Prepare to spin out base submodules
diff --git a/internal/cgen/base/all-impl.c b/internal/cgen/base/all-impl.c
index 0ba6e6e..894207d 100644
--- a/internal/cgen/base/all-impl.c
+++ b/internal/cgen/base/all-impl.c
@@ -118,6 +118,20 @@
#endif // !defined(WUFFS_CONFIG__MODULES) ||
// defined(WUFFS_CONFIG__MODULE__BASE)
+#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)
+
+// !! INSERT base/f64conv-submodule.c.
+
+#endif // !defined(WUFFS_CONFIG__MODULES) ||
+ // defined(WUFFS_CONFIG__MODULE__BASE)
+
+#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)
+
+// !! INSERT base/pixconv-submodule.c.
+
+#endif // !defined(WUFFS_CONFIG__MODULES) ||
+ // defined(WUFFS_CONFIG__MODULE__BASE)
+
#ifdef __cplusplus
} // extern "C"
#endif
diff --git a/internal/cgen/base/f64conv-submodule.c b/internal/cgen/base/f64conv-submodule.c
new file mode 100644
index 0000000..3bea12c
--- /dev/null
+++ b/internal/cgen/base/f64conv-submodule.c
@@ -0,0 +1,1264 @@
+// After editing this file, run "go generate" in the parent directory.
+
+// Copyright 2020 The Wuffs Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// ---------------- IEEE 754 Floating Point
+
+#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE 1023
+#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION 500
+
+// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL is the largest N
+// such that ((10 << N) < (1 << 64)).
+#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL 60
+
+// wuffs_base__private_implementation__high_prec_dec (abbreviated as HPD) is a
+// fixed precision floating point decimal number, augmented with ±infinity
+// values, but it cannot represent NaN (Not a Number).
+//
+// "High precision" means that the mantissa holds 500 decimal digits. 500 is
+// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION.
+//
+// An HPD isn't for general purpose arithmetic, only for conversions to and
+// from IEEE 754 double-precision floating point, where the largest and
+// smallest positive, finite values are approximately 1.8e+308 and 4.9e-324.
+// HPD exponents above +1023 mean infinity, below -1023 mean zero. The ±1023
+// bounds are further away from zero than ±(324 + 500), where 500 and 1023 is
+// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION and
+// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE.
+//
+// digits[.. num_digits] are the number's digits in big-endian order. The
+// uint8_t values are in the range [0 ..= 9], not ['0' ..= '9'], where e.g. '7'
+// is the ASCII value 0x37.
+//
+// decimal_point is the index (within digits) of the decimal point. It may be
+// negative or be larger than num_digits, in which case the explicit digits are
+// padded with implicit zeroes.
+//
+// For example, if num_digits is 3 and digits is "\x07\x08\x09":
+// - A decimal_point of -2 means ".00789"
+// - A decimal_point of -1 means ".0789"
+// - A decimal_point of +0 means ".789"
+// - A decimal_point of +1 means "7.89"
+// - A decimal_point of +2 means "78.9"
+// - A decimal_point of +3 means "789."
+// - A decimal_point of +4 means "7890."
+// - A decimal_point of +5 means "78900."
+//
+// As above, a decimal_point higher than +1023 means that the overall value is
+// infinity, lower than -1023 means zero.
+//
+// negative is a sign bit. An HPD can distinguish positive and negative zero.
+//
+// truncated is whether there are more than
+// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION digits, and at
+// least one of those extra digits are non-zero. The existence of long-tail
+// digits can affect rounding.
+//
+// The "all fields are zero" value is valid, and represents the number +0.
+typedef struct {
+ uint32_t num_digits;
+ int32_t decimal_point;
+ bool negative;
+ bool truncated;
+ uint8_t digits[WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION];
+} wuffs_base__private_implementation__high_prec_dec;
+
+// wuffs_base__private_implementation__high_prec_dec__trim trims trailing
+// zeroes from the h->digits[.. h->num_digits] slice. They have no benefit,
+// since we explicitly track h->decimal_point.
+//
+// Preconditions:
+// - h is non-NULL.
+static inline void //
+wuffs_base__private_implementation__high_prec_dec__trim(
+ wuffs_base__private_implementation__high_prec_dec* h) {
+ while ((h->num_digits > 0) && (h->digits[h->num_digits - 1] == 0)) {
+ h->num_digits--;
+ }
+}
+
+static wuffs_base__status //
+wuffs_base__private_implementation__high_prec_dec__parse(
+ wuffs_base__private_implementation__high_prec_dec* h,
+ wuffs_base__slice_u8 s) {
+ if (!h) {
+ return wuffs_base__make_status(wuffs_base__error__bad_receiver);
+ }
+ h->num_digits = 0;
+ h->decimal_point = 0;
+ h->negative = false;
+ h->truncated = false;
+
+ uint8_t* p = s.ptr;
+ uint8_t* q = s.ptr + s.len;
+
+ for (; (p < q) && (*p == '_'); p++) {
+ }
+ if (p >= q) {
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+
+ // Parse sign.
+ do {
+ if (*p == '+') {
+ p++;
+ } else if (*p == '-') {
+ h->negative = true;
+ p++;
+ } else {
+ break;
+ }
+ for (; (p < q) && (*p == '_'); p++) {
+ }
+ } while (0);
+
+ // Parse digits.
+ uint32_t nd = 0;
+ int32_t dp = 0;
+ bool saw_digits = false;
+ bool saw_non_zero_digits = false;
+ bool saw_dot = false;
+ for (; p < q; p++) {
+ if (*p == '_') {
+ // No-op.
+
+ } else if ((*p == '.') || (*p == ',')) {
+ // As per https://en.wikipedia.org/wiki/Decimal_separator, both '.' or
+ // ',' are commonly used. We just parse either, regardless of LOCALE.
+ if (saw_dot) {
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+ saw_dot = true;
+ dp = (int32_t)nd;
+
+ } else if ('0' == *p) {
+ if (!saw_dot && !saw_non_zero_digits && saw_digits) {
+ // We don't allow unnecessary leading zeroes: "000123" or "0644".
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+ saw_digits = true;
+ if (nd == 0) {
+ // Track leading zeroes implicitly.
+ dp--;
+ } else if (nd <
+ WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
+ h->digits[nd++] = 0;
+ } else {
+ // Long-tail zeroes are ignored.
+ }
+
+ } else if (('0' < *p) && (*p <= '9')) {
+ if (!saw_dot && !saw_non_zero_digits && saw_digits) {
+ // We don't allow unnecessary leading zeroes: "000123" or "0644".
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+ saw_digits = true;
+ saw_non_zero_digits = true;
+ if (nd < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
+ h->digits[nd++] = (uint8_t)(*p - '0');
+ } else {
+ // Long-tail non-zeroes set the truncated bit.
+ h->truncated = true;
+ }
+
+ } else {
+ break;
+ }
+ }
+
+ if (!saw_digits) {
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+ if (!saw_dot) {
+ dp = (int32_t)nd;
+ }
+
+ // Parse exponent.
+ if ((p < q) && ((*p == 'E') || (*p == 'e'))) {
+ p++;
+ for (; (p < q) && (*p == '_'); p++) {
+ }
+ if (p >= q) {
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+
+ int32_t exp_sign = +1;
+ if (*p == '+') {
+ p++;
+ } else if (*p == '-') {
+ exp_sign = -1;
+ p++;
+ }
+
+ int32_t exp = 0;
+ const int32_t exp_large =
+ WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE +
+ WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION;
+ bool saw_exp_digits = false;
+ for (; p < q; p++) {
+ if (*p == '_') {
+ // No-op.
+ } else if (('0' <= *p) && (*p <= '9')) {
+ saw_exp_digits = true;
+ if (exp < exp_large) {
+ exp = (10 * exp) + ((int32_t)(*p - '0'));
+ }
+ } else {
+ break;
+ }
+ }
+ if (!saw_exp_digits) {
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+ dp += exp_sign * exp;
+ }
+
+ // Finish.
+ if (p != q) {
+ return wuffs_base__make_status(wuffs_base__error__bad_argument);
+ }
+ h->num_digits = nd;
+ if (nd == 0) {
+ h->decimal_point = 0;
+ } else if (dp <
+ -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
+ h->decimal_point =
+ -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE - 1;
+ } else if (dp >
+ +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
+ h->decimal_point =
+ +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE + 1;
+ } else {
+ h->decimal_point = dp;
+ }
+ wuffs_base__private_implementation__high_prec_dec__trim(h);
+ return wuffs_base__make_status(NULL);
+}
+
+// --------
+
+// The etc__hpd_left_shift and etc__powers_of_5 tables were printed by
+// script/print-hpd-left-shift.go. That script has an optional -comments flag,
+// whose output is not copied here, which prints further detail.
+//
+// These tables are used in
+// wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits.
+
+// wuffs_base__private_implementation__hpd_left_shift[i] encodes the number of
+// new digits created after multiplying a positive integer by (1 << i): the
+// additional length in the decimal representation. For example, shifting "234"
+// by 3 (equivalent to multiplying by 8) will produce "1872". Going from a
+// 3-length string to a 4-length string means that 1 new digit was added (and
+// existing digits may have changed).
+//
+// Shifting by i can add either N or N-1 new digits, depending on whether the
+// original positive integer compares >= or < to the i'th power of 5 (as 10
+// equals 2 * 5). Comparison is lexicographic, not numerical.
+//
+// For example, shifting by 4 (i.e. multiplying by 16) can add 1 or 2 new
+// digits, depending on a lexicographic comparison to (5 ** 4), i.e. "625":
+// - ("1" << 4) is "16", which adds 1 new digit.
+// - ("5678" << 4) is "90848", which adds 1 new digit.
+// - ("624" << 4) is "9984", which adds 1 new digit.
+// - ("62498" << 4) is "999968", which adds 1 new digit.
+// - ("625" << 4) is "10000", which adds 2 new digits.
+// - ("625001" << 4) is "10000016", which adds 2 new digits.
+// - ("7008" << 4) is "112128", which adds 2 new digits.
+// - ("99" << 4) is "1584", which adds 2 new digits.
+//
+// Thus, when i is 4, N is 2 and (5 ** i) is "625". This etc__hpd_left_shift
+// array encodes this as:
+// - etc__hpd_left_shift[4] is 0x1006 = (2 << 11) | 0x0006.
+// - etc__hpd_left_shift[5] is 0x1009 = (? << 11) | 0x0009.
+// where the ? isn't relevant for i == 4.
+//
+// The high 5 bits of etc__hpd_left_shift[i] is N, the higher of the two
+// possible number of new digits. The low 11 bits are an offset into the
+// etc__powers_of_5 array (of length 0x051C, so offsets fit in 11 bits). When i
+// is 4, its offset and the next one is 6 and 9, and etc__powers_of_5[6 .. 9]
+// is the string "\x06\x02\x05", so the relevant power of 5 is "625".
+//
+// Thanks to Ken Thompson for the original idea.
+static const uint16_t wuffs_base__private_implementation__hpd_left_shift[65] = {
+ 0x0000, 0x0800, 0x0801, 0x0803, 0x1006, 0x1009, 0x100D, 0x1812, 0x1817,
+ 0x181D, 0x2024, 0x202B, 0x2033, 0x203C, 0x2846, 0x2850, 0x285B, 0x3067,
+ 0x3073, 0x3080, 0x388E, 0x389C, 0x38AB, 0x38BB, 0x40CC, 0x40DD, 0x40EF,
+ 0x4902, 0x4915, 0x4929, 0x513E, 0x5153, 0x5169, 0x5180, 0x5998, 0x59B0,
+ 0x59C9, 0x61E3, 0x61FD, 0x6218, 0x6A34, 0x6A50, 0x6A6D, 0x6A8B, 0x72AA,
+ 0x72C9, 0x72E9, 0x7B0A, 0x7B2B, 0x7B4D, 0x8370, 0x8393, 0x83B7, 0x83DC,
+ 0x8C02, 0x8C28, 0x8C4F, 0x9477, 0x949F, 0x94C8, 0x9CF2, 0x051C, 0x051C,
+ 0x051C, 0x051C,
+};
+
+// wuffs_base__private_implementation__powers_of_5 contains the powers of 5,
+// concatenated together: "5", "25", "125", "625", "3125", etc.
+static const uint8_t wuffs_base__private_implementation__powers_of_5[0x051C] = {
+ 5, 2, 5, 1, 2, 5, 6, 2, 5, 3, 1, 2, 5, 1, 5, 6, 2, 5, 7, 8, 1, 2, 5, 3, 9,
+ 0, 6, 2, 5, 1, 9, 5, 3, 1, 2, 5, 9, 7, 6, 5, 6, 2, 5, 4, 8, 8, 2, 8, 1, 2,
+ 5, 2, 4, 4, 1, 4, 0, 6, 2, 5, 1, 2, 2, 0, 7, 0, 3, 1, 2, 5, 6, 1, 0, 3, 5,
+ 1, 5, 6, 2, 5, 3, 0, 5, 1, 7, 5, 7, 8, 1, 2, 5, 1, 5, 2, 5, 8, 7, 8, 9, 0,
+ 6, 2, 5, 7, 6, 2, 9, 3, 9, 4, 5, 3, 1, 2, 5, 3, 8, 1, 4, 6, 9, 7, 2, 6, 5,
+ 6, 2, 5, 1, 9, 0, 7, 3, 4, 8, 6, 3, 2, 8, 1, 2, 5, 9, 5, 3, 6, 7, 4, 3, 1,
+ 6, 4, 0, 6, 2, 5, 4, 7, 6, 8, 3, 7, 1, 5, 8, 2, 0, 3, 1, 2, 5, 2, 3, 8, 4,
+ 1, 8, 5, 7, 9, 1, 0, 1, 5, 6, 2, 5, 1, 1, 9, 2, 0, 9, 2, 8, 9, 5, 5, 0, 7,
+ 8, 1, 2, 5, 5, 9, 6, 0, 4, 6, 4, 4, 7, 7, 5, 3, 9, 0, 6, 2, 5, 2, 9, 8, 0,
+ 2, 3, 2, 2, 3, 8, 7, 6, 9, 5, 3, 1, 2, 5, 1, 4, 9, 0, 1, 1, 6, 1, 1, 9, 3,
+ 8, 4, 7, 6, 5, 6, 2, 5, 7, 4, 5, 0, 5, 8, 0, 5, 9, 6, 9, 2, 3, 8, 2, 8, 1,
+ 2, 5, 3, 7, 2, 5, 2, 9, 0, 2, 9, 8, 4, 6, 1, 9, 1, 4, 0, 6, 2, 5, 1, 8, 6,
+ 2, 6, 4, 5, 1, 4, 9, 2, 3, 0, 9, 5, 7, 0, 3, 1, 2, 5, 9, 3, 1, 3, 2, 2, 5,
+ 7, 4, 6, 1, 5, 4, 7, 8, 5, 1, 5, 6, 2, 5, 4, 6, 5, 6, 6, 1, 2, 8, 7, 3, 0,
+ 7, 7, 3, 9, 2, 5, 7, 8, 1, 2, 5, 2, 3, 2, 8, 3, 0, 6, 4, 3, 6, 5, 3, 8, 6,
+ 9, 6, 2, 8, 9, 0, 6, 2, 5, 1, 1, 6, 4, 1, 5, 3, 2, 1, 8, 2, 6, 9, 3, 4, 8,
+ 1, 4, 4, 5, 3, 1, 2, 5, 5, 8, 2, 0, 7, 6, 6, 0, 9, 1, 3, 4, 6, 7, 4, 0, 7,
+ 2, 2, 6, 5, 6, 2, 5, 2, 9, 1, 0, 3, 8, 3, 0, 4, 5, 6, 7, 3, 3, 7, 0, 3, 6,
+ 1, 3, 2, 8, 1, 2, 5, 1, 4, 5, 5, 1, 9, 1, 5, 2, 2, 8, 3, 6, 6, 8, 5, 1, 8,
+ 0, 6, 6, 4, 0, 6, 2, 5, 7, 2, 7, 5, 9, 5, 7, 6, 1, 4, 1, 8, 3, 4, 2, 5, 9,
+ 0, 3, 3, 2, 0, 3, 1, 2, 5, 3, 6, 3, 7, 9, 7, 8, 8, 0, 7, 0, 9, 1, 7, 1, 2,
+ 9, 5, 1, 6, 6, 0, 1, 5, 6, 2, 5, 1, 8, 1, 8, 9, 8, 9, 4, 0, 3, 5, 4, 5, 8,
+ 5, 6, 4, 7, 5, 8, 3, 0, 0, 7, 8, 1, 2, 5, 9, 0, 9, 4, 9, 4, 7, 0, 1, 7, 7,
+ 2, 9, 2, 8, 2, 3, 7, 9, 1, 5, 0, 3, 9, 0, 6, 2, 5, 4, 5, 4, 7, 4, 7, 3, 5,
+ 0, 8, 8, 6, 4, 6, 4, 1, 1, 8, 9, 5, 7, 5, 1, 9, 5, 3, 1, 2, 5, 2, 2, 7, 3,
+ 7, 3, 6, 7, 5, 4, 4, 3, 2, 3, 2, 0, 5, 9, 4, 7, 8, 7, 5, 9, 7, 6, 5, 6, 2,
+ 5, 1, 1, 3, 6, 8, 6, 8, 3, 7, 7, 2, 1, 6, 1, 6, 0, 2, 9, 7, 3, 9, 3, 7, 9,
+ 8, 8, 2, 8, 1, 2, 5, 5, 6, 8, 4, 3, 4, 1, 8, 8, 6, 0, 8, 0, 8, 0, 1, 4, 8,
+ 6, 9, 6, 8, 9, 9, 4, 1, 4, 0, 6, 2, 5, 2, 8, 4, 2, 1, 7, 0, 9, 4, 3, 0, 4,
+ 0, 4, 0, 0, 7, 4, 3, 4, 8, 4, 4, 9, 7, 0, 7, 0, 3, 1, 2, 5, 1, 4, 2, 1, 0,
+ 8, 5, 4, 7, 1, 5, 2, 0, 2, 0, 0, 3, 7, 1, 7, 4, 2, 2, 4, 8, 5, 3, 5, 1, 5,
+ 6, 2, 5, 7, 1, 0, 5, 4, 2, 7, 3, 5, 7, 6, 0, 1, 0, 0, 1, 8, 5, 8, 7, 1, 1,
+ 2, 4, 2, 6, 7, 5, 7, 8, 1, 2, 5, 3, 5, 5, 2, 7, 1, 3, 6, 7, 8, 8, 0, 0, 5,
+ 0, 0, 9, 2, 9, 3, 5, 5, 6, 2, 1, 3, 3, 7, 8, 9, 0, 6, 2, 5, 1, 7, 7, 6, 3,
+ 5, 6, 8, 3, 9, 4, 0, 0, 2, 5, 0, 4, 6, 4, 6, 7, 7, 8, 1, 0, 6, 6, 8, 9, 4,
+ 5, 3, 1, 2, 5, 8, 8, 8, 1, 7, 8, 4, 1, 9, 7, 0, 0, 1, 2, 5, 2, 3, 2, 3, 3,
+ 8, 9, 0, 5, 3, 3, 4, 4, 7, 2, 6, 5, 6, 2, 5, 4, 4, 4, 0, 8, 9, 2, 0, 9, 8,
+ 5, 0, 0, 6, 2, 6, 1, 6, 1, 6, 9, 4, 5, 2, 6, 6, 7, 2, 3, 6, 3, 2, 8, 1, 2,
+ 5, 2, 2, 2, 0, 4, 4, 6, 0, 4, 9, 2, 5, 0, 3, 1, 3, 0, 8, 0, 8, 4, 7, 2, 6,
+ 3, 3, 3, 6, 1, 8, 1, 6, 4, 0, 6, 2, 5, 1, 1, 1, 0, 2, 2, 3, 0, 2, 4, 6, 2,
+ 5, 1, 5, 6, 5, 4, 0, 4, 2, 3, 6, 3, 1, 6, 6, 8, 0, 9, 0, 8, 2, 0, 3, 1, 2,
+ 5, 5, 5, 5, 1, 1, 1, 5, 1, 2, 3, 1, 2, 5, 7, 8, 2, 7, 0, 2, 1, 1, 8, 1, 5,
+ 8, 3, 4, 0, 4, 5, 4, 1, 0, 1, 5, 6, 2, 5, 2, 7, 7, 5, 5, 5, 7, 5, 6, 1, 5,
+ 6, 2, 8, 9, 1, 3, 5, 1, 0, 5, 9, 0, 7, 9, 1, 7, 0, 2, 2, 7, 0, 5, 0, 7, 8,
+ 1, 2, 5, 1, 3, 8, 7, 7, 7, 8, 7, 8, 0, 7, 8, 1, 4, 4, 5, 6, 7, 5, 5, 2, 9,
+ 5, 3, 9, 5, 8, 5, 1, 1, 3, 5, 2, 5, 3, 9, 0, 6, 2, 5, 6, 9, 3, 8, 8, 9, 3,
+ 9, 0, 3, 9, 0, 7, 2, 2, 8, 3, 7, 7, 6, 4, 7, 6, 9, 7, 9, 2, 5, 5, 6, 7, 6,
+ 2, 6, 9, 5, 3, 1, 2, 5, 3, 4, 6, 9, 4, 4, 6, 9, 5, 1, 9, 5, 3, 6, 1, 4, 1,
+ 8, 8, 8, 2, 3, 8, 4, 8, 9, 6, 2, 7, 8, 3, 8, 1, 3, 4, 7, 6, 5, 6, 2, 5, 1,
+ 7, 3, 4, 7, 2, 3, 4, 7, 5, 9, 7, 6, 8, 0, 7, 0, 9, 4, 4, 1, 1, 9, 2, 4, 4,
+ 8, 1, 3, 9, 1, 9, 0, 6, 7, 3, 8, 2, 8, 1, 2, 5, 8, 6, 7, 3, 6, 1, 7, 3, 7,
+ 9, 8, 8, 4, 0, 3, 5, 4, 7, 2, 0, 5, 9, 6, 2, 2, 4, 0, 6, 9, 5, 9, 5, 3, 3,
+ 6, 9, 1, 4, 0, 6, 2, 5,
+};
+
+// wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits
+// returns the number of additional decimal digits when left-shifting by shift.
+//
+// See below for preconditions.
+static uint32_t //
+wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits(
+ wuffs_base__private_implementation__high_prec_dec* h,
+ uint32_t shift) {
+ // Masking with 0x3F should be unnecessary (assuming the preconditions) but
+ // it's cheap and ensures that we don't overflow the
+ // wuffs_base__private_implementation__hpd_left_shift array.
+ shift &= 63;
+
+ uint32_t x_a = wuffs_base__private_implementation__hpd_left_shift[shift];
+ uint32_t x_b = wuffs_base__private_implementation__hpd_left_shift[shift + 1];
+ uint32_t num_new_digits = x_a >> 11;
+ uint32_t pow5_a = 0x7FF & x_a;
+ uint32_t pow5_b = 0x7FF & x_b;
+
+ const uint8_t* pow5 =
+ &wuffs_base__private_implementation__powers_of_5[pow5_a];
+ uint32_t i = 0;
+ uint32_t n = pow5_b - pow5_a;
+ for (; i < n; i++) {
+ if (i >= h->num_digits) {
+ return num_new_digits - 1;
+ } else if (h->digits[i] == pow5[i]) {
+ continue;
+ } else if (h->digits[i] < pow5[i]) {
+ return num_new_digits - 1;
+ } else {
+ return num_new_digits;
+ }
+ }
+ return num_new_digits;
+}
+
+// --------
+
+// wuffs_base__private_implementation__high_prec_dec__rounded_integer returns
+// the integral (non-fractional) part of h, provided that it is 18 or fewer
+// decimal digits. For 19 or more digits, it returns UINT64_MAX. Note that:
+// - (1 << 53) is 9007199254740992, which has 16 decimal digits.
+// - (1 << 56) is 72057594037927936, which has 17 decimal digits.
+// - (1 << 59) is 576460752303423488, which has 18 decimal digits.
+// - (1 << 63) is 9223372036854775808, which has 19 decimal digits.
+// and that IEEE 754 double precision has 52 mantissa bits.
+//
+// That integral part is rounded-to-even: rounding 7.5 or 8.5 both give 8.
+//
+// h's negative bit is ignored: rounding -8.6 returns 9.
+//
+// See below for preconditions.
+static uint64_t //
+wuffs_base__private_implementation__high_prec_dec__rounded_integer(
+ wuffs_base__private_implementation__high_prec_dec* h) {
+ if ((h->num_digits == 0) || (h->decimal_point < 0)) {
+ return 0;
+ } else if (h->decimal_point > 18) {
+ return UINT64_MAX;
+ }
+
+ uint32_t dp = (uint32_t)(h->decimal_point);
+ uint64_t n = 0;
+ uint32_t i = 0;
+ for (; i < dp; i++) {
+ n = (10 * n) + ((i < h->num_digits) ? h->digits[i] : 0);
+ }
+
+ bool round_up = false;
+ if (dp < h->num_digits) {
+ round_up = h->digits[dp] >= 5;
+ if ((h->digits[dp] == 5) && (dp + 1 == h->num_digits)) {
+ // We are exactly halfway. If we're truncated, round up, otherwise round
+ // to even.
+ round_up = h->truncated || //
+ ((dp > 0) && (1 & h->digits[dp - 1]));
+ }
+ }
+ if (round_up) {
+ n++;
+ }
+
+ return n;
+}
+
+// wuffs_base__private_implementation__high_prec_dec__small_xshift shifts h's
+// number (where 'x' is 'l' or 'r' for left or right) by a small shift value.
+//
+// Preconditions:
+// - h is non-NULL.
+// - h->decimal_point is "not extreme".
+// - shift is non-zero.
+// - shift is "a small shift".
+//
+// "Not extreme" means within
+// ±WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE.
+//
+// "A small shift" means not more than
+// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL.
+//
+// wuffs_base__private_implementation__high_prec_dec__rounded_integer and
+// wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits
+// have the same preconditions.
+
+static void //
+wuffs_base__private_implementation__high_prec_dec__small_lshift(
+ wuffs_base__private_implementation__high_prec_dec* h,
+ uint32_t shift) {
+ if (h->num_digits == 0) {
+ return;
+ }
+ uint32_t num_new_digits =
+ wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits(
+ h, shift);
+ uint32_t rx = h->num_digits - 1; // Read index.
+ uint32_t wx = h->num_digits - 1 + num_new_digits; // Write index.
+ uint64_t n = 0;
+
+ // Repeat: pick up a digit, put down a digit, right to left.
+ while (((int32_t)rx) >= 0) {
+ n += ((uint64_t)(h->digits[rx])) << shift;
+ uint64_t quo = n / 10;
+ uint64_t rem = n - (10 * quo);
+ if (wx < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
+ h->digits[wx] = (uint8_t)rem;
+ } else if (rem > 0) {
+ h->truncated = true;
+ }
+ n = quo;
+ wx--;
+ rx--;
+ }
+
+ // Put down leading digits, right to left.
+ while (n > 0) {
+ uint64_t quo = n / 10;
+ uint64_t rem = n - (10 * quo);
+ if (wx < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
+ h->digits[wx] = (uint8_t)rem;
+ } else if (rem > 0) {
+ h->truncated = true;
+ }
+ n = quo;
+ wx--;
+ }
+
+ // Finish.
+ h->num_digits += num_new_digits;
+ if (h->num_digits >
+ WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
+ h->num_digits = WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION;
+ }
+ h->decimal_point += (int32_t)num_new_digits;
+ wuffs_base__private_implementation__high_prec_dec__trim(h);
+}
+
+static void //
+wuffs_base__private_implementation__high_prec_dec__small_rshift(
+ wuffs_base__private_implementation__high_prec_dec* h,
+ uint32_t shift) {
+ uint32_t rx = 0; // Read index.
+ uint32_t wx = 0; // Write index.
+ uint64_t n = 0;
+
+ // Pick up enough leading digits to cover the first shift.
+ while ((n >> shift) == 0) {
+ if (rx < h->num_digits) {
+ // Read a digit.
+ n = (10 * n) + h->digits[rx++];
+ } else if (n == 0) {
+ // h's number used to be zero and remains zero.
+ return;
+ } else {
+ // Read sufficient implicit trailing zeroes.
+ while ((n >> shift) == 0) {
+ n = 10 * n;
+ rx++;
+ }
+ break;
+ }
+ }
+ h->decimal_point -= ((int32_t)(rx - 1));
+ if (h->decimal_point <
+ -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
+ // After the shift, h's number is effectively zero.
+ h->num_digits = 0;
+ h->decimal_point = 0;
+ h->negative = false;
+ h->truncated = false;
+ return;
+ }
+
+ // Repeat: pick up a digit, put down a digit, left to right.
+ uint64_t mask = (((uint64_t)(1)) << shift) - 1;
+ while (rx < h->num_digits) {
+ uint8_t new_digit = ((uint8_t)(n >> shift));
+ n = (10 * (n & mask)) + h->digits[rx++];
+ h->digits[wx++] = new_digit;
+ }
+
+ // Put down trailing digits, left to right.
+ while (n > 0) {
+ uint8_t new_digit = ((uint8_t)(n >> shift));
+ n = 10 * (n & mask);
+ if (wx < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
+ h->digits[wx++] = new_digit;
+ } else if (new_digit > 0) {
+ h->truncated = true;
+ }
+ }
+
+ // Finish.
+ h->num_digits = wx;
+ wuffs_base__private_implementation__high_prec_dec__trim(h);
+}
+
+// --------
+
+// The wuffs_base__private_implementation__etc_powers_of_10 tables were printed
+// by script/print-mpb-powers-of-10.go. That script has an optional -comments
+// flag, whose output is not copied here, which prints further detail.
+//
+// These tables are used in
+// wuffs_base__private_implementation__medium_prec_bin__assign_from_hpd.
+
+// wuffs_base__private_implementation__big_powers_of_10 contains approximations
+// to the powers of 10, ranging from 1e-348 to 1e+340, with the exponent
+// stepping by 8: -348, -340, -332, ..., -12, -4, +4, +12, ..., +340. Each step
+// consists of three uint32_t elements. There are 87 triples, 87 * 3 = 261.
+//
+// For example, the third approximation, for 1e-332, consists of the uint32_t
+// triple (0x3055AC76, 0x8B16FB20, 0xFFFFFB72). The first two of that triple
+// are a little-endian uint64_t value: 0x8B16FB203055AC76. The last one is an
+// int32_t value: -1166. Together, they represent the approximation:
+// 1e-332 ≈ 0x8B16FB203055AC76 * (2 ** -1166)
+// Similarly, the (0x00000000, 0x9C400000, 0xFFFFFFCE) uint32_t triple means:
+// 1e+4 ≈ 0x9C40000000000000 * (2 ** -50) // This approx'n is exact.
+// Similarly, the (0xD4C4FB27, 0xED63A231, 0x000000A2) uint32_t triple means:
+// 1e+68 ≈ 0xED63A231D4C4FB27 * (2 ** 162)
+static const uint32_t
+ wuffs_base__private_implementation__big_powers_of_10[261] = {
+ 0x081C0288, 0xFA8FD5A0, 0xFFFFFB3C, 0xA23EBF76, 0xBAAEE17F, 0xFFFFFB57,
+ 0x3055AC76, 0x8B16FB20, 0xFFFFFB72, 0x5DCE35EA, 0xCF42894A, 0xFFFFFB8C,
+ 0x55653B2D, 0x9A6BB0AA, 0xFFFFFBA7, 0x3D1A45DF, 0xE61ACF03, 0xFFFFFBC1,
+ 0xC79AC6CA, 0xAB70FE17, 0xFFFFFBDC, 0xBEBCDC4F, 0xFF77B1FC, 0xFFFFFBF6,
+ 0x416BD60C, 0xBE5691EF, 0xFFFFFC11, 0x907FFC3C, 0x8DD01FAD, 0xFFFFFC2C,
+ 0x31559A83, 0xD3515C28, 0xFFFFFC46, 0xADA6C9B5, 0x9D71AC8F, 0xFFFFFC61,
+ 0x23EE8BCB, 0xEA9C2277, 0xFFFFFC7B, 0x4078536D, 0xAECC4991, 0xFFFFFC96,
+ 0x5DB6CE57, 0x823C1279, 0xFFFFFCB1, 0x4DFB5637, 0xC2109436, 0xFFFFFCCB,
+ 0x3848984F, 0x9096EA6F, 0xFFFFFCE6, 0x25823AC7, 0xD77485CB, 0xFFFFFD00,
+ 0x97BF97F4, 0xA086CFCD, 0xFFFFFD1B, 0x172AACE5, 0xEF340A98, 0xFFFFFD35,
+ 0x2A35B28E, 0xB23867FB, 0xFFFFFD50, 0xD2C63F3B, 0x84C8D4DF, 0xFFFFFD6B,
+ 0x1AD3CDBA, 0xC5DD4427, 0xFFFFFD85, 0xBB25C996, 0x936B9FCE, 0xFFFFFDA0,
+ 0x7D62A584, 0xDBAC6C24, 0xFFFFFDBA, 0x0D5FDAF6, 0xA3AB6658, 0xFFFFFDD5,
+ 0xDEC3F126, 0xF3E2F893, 0xFFFFFDEF, 0xAAFF80B8, 0xB5B5ADA8, 0xFFFFFE0A,
+ 0x6C7C4A8B, 0x87625F05, 0xFFFFFE25, 0x34C13053, 0xC9BCFF60, 0xFFFFFE3F,
+ 0x91BA2655, 0x964E858C, 0xFFFFFE5A, 0x70297EBD, 0xDFF97724, 0xFFFFFE74,
+ 0xB8E5B88F, 0xA6DFBD9F, 0xFFFFFE8F, 0x88747D94, 0xF8A95FCF, 0xFFFFFEA9,
+ 0x8FA89BCF, 0xB9447093, 0xFFFFFEC4, 0xBF0F156B, 0x8A08F0F8, 0xFFFFFEDF,
+ 0x653131B6, 0xCDB02555, 0xFFFFFEF9, 0xD07B7FAC, 0x993FE2C6, 0xFFFFFF14,
+ 0x2A2B3B06, 0xE45C10C4, 0xFFFFFF2E, 0x697392D3, 0xAA242499, 0xFFFFFF49,
+ 0x8300CA0E, 0xFD87B5F2, 0xFFFFFF63, 0x92111AEB, 0xBCE50864, 0xFFFFFF7E,
+ 0x6F5088CC, 0x8CBCCC09, 0xFFFFFF99, 0xE219652C, 0xD1B71758, 0xFFFFFFB3,
+ 0x00000000, 0x9C400000, 0xFFFFFFCE, 0x00000000, 0xE8D4A510, 0xFFFFFFE8,
+ 0xAC620000, 0xAD78EBC5, 0x00000003, 0xF8940984, 0x813F3978, 0x0000001E,
+ 0xC90715B3, 0xC097CE7B, 0x00000038, 0x7BEA5C70, 0x8F7E32CE, 0x00000053,
+ 0xABE98068, 0xD5D238A4, 0x0000006D, 0x179A2245, 0x9F4F2726, 0x00000088,
+ 0xD4C4FB27, 0xED63A231, 0x000000A2, 0x8CC8ADA8, 0xB0DE6538, 0x000000BD,
+ 0x1AAB65DB, 0x83C7088E, 0x000000D8, 0x42711D9A, 0xC45D1DF9, 0x000000F2,
+ 0xA61BE758, 0x924D692C, 0x0000010D, 0x1A708DEA, 0xDA01EE64, 0x00000127,
+ 0x9AEF774A, 0xA26DA399, 0x00000142, 0xB47D6B85, 0xF209787B, 0x0000015C,
+ 0x79DD1877, 0xB454E4A1, 0x00000177, 0x5B9BC5C2, 0x865B8692, 0x00000192,
+ 0xC8965D3D, 0xC83553C5, 0x000001AC, 0xFA97A0B3, 0x952AB45C, 0x000001C7,
+ 0x99A05FE3, 0xDE469FBD, 0x000001E1, 0xDB398C25, 0xA59BC234, 0x000001FC,
+ 0xA3989F5C, 0xF6C69A72, 0x00000216, 0x54E9BECE, 0xB7DCBF53, 0x00000231,
+ 0xF22241E2, 0x88FCF317, 0x0000024C, 0xD35C78A5, 0xCC20CE9B, 0x00000266,
+ 0x7B2153DF, 0x98165AF3, 0x00000281, 0x971F303A, 0xE2A0B5DC, 0x0000029B,
+ 0x5CE3B396, 0xA8D9D153, 0x000002B6, 0xA4A7443C, 0xFB9B7CD9, 0x000002D0,
+ 0xA7A44410, 0xBB764C4C, 0x000002EB, 0xB6409C1A, 0x8BAB8EEF, 0x00000306,
+ 0xA657842C, 0xD01FEF10, 0x00000320, 0xE9913129, 0x9B10A4E5, 0x0000033B,
+ 0xA19C0C9D, 0xE7109BFB, 0x00000355, 0x623BF429, 0xAC2820D9, 0x00000370,
+ 0x7AA7CF85, 0x80444B5E, 0x0000038B, 0x03ACDD2D, 0xBF21E440, 0x000003A5,
+ 0x5E44FF8F, 0x8E679C2F, 0x000003C0, 0x9C8CB841, 0xD433179D, 0x000003DA,
+ 0xB4E31BA9, 0x9E19DB92, 0x000003F5, 0xBADF77D9, 0xEB96BF6E, 0x0000040F,
+ 0x9BF0EE6B, 0xAF87023B, 0x0000042A,
+};
+
+// wuffs_base__private_implementation__small_powers_of_10 contains
+// approximations to the powers of 10, ranging from 1e+0 to 1e+7, with the
+// exponent stepping by 1. Each step consists of three uint32_t elements.
+//
+// For example, the third approximation, for 1e+2, consists of the uint32_t
+// triple (0x00000000, 0xC8000000, 0xFFFFFFC7). The first two of that triple
+// are a little-endian uint64_t value: 0xC800000000000000. The last one is an
+// int32_t value: -57. Together, they represent the approximation:
+// 1e+2 ≈ 0xC800000000000000 * (2 ** -57) // This approx'n is exact.
+// Similarly, the (0x00000000, 0x9C400000, 0xFFFFFFCE) uint32_t triple means:
+// 1e+4 ≈ 0x9C40000000000000 * (2 ** -50) // This approx'n is exact.
+static const uint32_t
+ wuffs_base__private_implementation__small_powers_of_10[24] = {
+ 0x00000000, 0x80000000, 0xFFFFFFC1, 0x00000000, 0xA0000000, 0xFFFFFFC4,
+ 0x00000000, 0xC8000000, 0xFFFFFFC7, 0x00000000, 0xFA000000, 0xFFFFFFCA,
+ 0x00000000, 0x9C400000, 0xFFFFFFCE, 0x00000000, 0xC3500000, 0xFFFFFFD1,
+ 0x00000000, 0xF4240000, 0xFFFFFFD4, 0x00000000, 0x98968000, 0xFFFFFFD8,
+};
+
+// wuffs_base__private_implementation__f64_powers_of_10 holds powers of 10 that
+// can be exactly represented by a float64 (what C calls a double).
+static const double wuffs_base__private_implementation__f64_powers_of_10[23] = {
+ 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11,
+ 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22,
+};
+
+// --------
+
+// wuffs_base__private_implementation__medium_prec_bin (abbreviated as MPB) is
+// a fixed precision floating point binary number. Unlike IEEE 754 Floating
+// Point, it cannot represent infinity or NaN (Not a Number).
+//
+// "Medium precision" means that the mantissa holds 64 binary digits, a little
+// more than "double precision", and sizeof(MPB) > sizeof(double). 64 is
+// obviously the number of bits in a uint64_t.
+//
+// An MPB isn't for general purpose arithmetic, only for conversions to and
+// from IEEE 754 double-precision floating point.
+//
+// There is no implicit mantissa bit. The mantissa field is zero if and only if
+// the overall floating point value is ±0. An MPB is normalized if the mantissa
+// is zero or its high bit (the 1<<63 bit) is set.
+//
+// There is no negative bit. An MPB can only represent non-negative numbers.
+//
+// The "all fields are zero" value is valid, and represents the number +0.
+//
+// This is the "Do It Yourself Floating Point" data structure from Loitsch,
+// "Printing Floating-Point Numbers Quickly and Accurately with Integers"
+// (https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf).
+//
+// Florian Loitsch is also the primary contributor to
+// https://github.com/google/double-conversion
+typedef struct {
+ uint64_t mantissa;
+ int32_t exp2;
+} wuffs_base__private_implementation__medium_prec_bin;
+
+static uint32_t //
+wuffs_base__private_implementation__medium_prec_bin__normalize(
+ wuffs_base__private_implementation__medium_prec_bin* m) {
+ if (m->mantissa == 0) {
+ return 0;
+ }
+ uint32_t shift = wuffs_base__count_leading_zeroes_u64(m->mantissa);
+ m->mantissa <<= shift;
+ m->exp2 -= (int32_t)shift;
+ return shift;
+}
+
+// wuffs_base__private_implementation__medium_prec_bin__mul_pow_10 sets m to be
+// (m * pow), where pow comes from an etc_powers_of_10 triple starting at p.
+//
+// The result is rounded, but not necessarily normalized.
+//
+// Preconditions:
+// - m is non-NULL.
+// - m->mantissa is non-zero.
+// - m->mantissa's high bit is set (i.e. m is normalized).
+//
+// The etc_powers_of_10 triple is already normalized.
+static void //
+wuffs_base__private_implementation__medium_prec_bin__mul_pow_10(
+ wuffs_base__private_implementation__medium_prec_bin* m,
+ const uint32_t* p) {
+ uint64_t p_mantissa = ((uint64_t)p[0]) | (((uint64_t)p[1]) << 32);
+ int32_t p_exp2 = (int32_t)p[2];
+
+ wuffs_base__multiply_u64__output o =
+ wuffs_base__multiply_u64(m->mantissa, p_mantissa);
+ // Round the mantissa up. It cannot overflow because the maximum possible
+ // value of o.hi is 0xFFFFFFFFFFFFFFFE.
+ m->mantissa = o.hi + (o.lo >> 63);
+ m->exp2 = m->exp2 + p_exp2 + 64;
+}
+
+// wuffs_base__private_implementation__medium_prec_bin__as_f64 converts m to a
+// double (what C calls a double-precision float64).
+//
+// Preconditions:
+// - m is non-NULL.
+// - m->mantissa is non-zero.
+// - m->mantissa's high bit is set (i.e. m is normalized).
+static double //
+wuffs_base__private_implementation__medium_prec_bin__as_f64(
+ const wuffs_base__private_implementation__medium_prec_bin* m,
+ bool negative) {
+ uint64_t mantissa64 = m->mantissa;
+ // An mpb's mantissa has the implicit (binary) decimal point at the right
+ // hand end of the mantissa's explicit digits. A double-precision's mantissa
+ // has that decimal point near the left hand end. There's also an explicit
+ // versus implicit leading 1 bit (binary digit). Together, the difference in
+ // semantics corresponds to adding 63.
+ int32_t exp2 = m->exp2 + 63;
+
+ // Ensure that exp2 is at least -1022, the minimum double-precision exponent
+ // for normal (as opposed to subnormal) numbers.
+ if (-1022 > exp2) {
+ uint32_t n = (uint32_t)(-1022 - exp2);
+ mantissa64 >>= n;
+ exp2 += (int32_t)n;
+ }
+
+ // Extract the (1 + 52) bits from the 64-bit mantissa64. 52 is the number of
+ // explicit mantissa bits in a double-precision f64.
+ //
+ // Before, we have 64 bits and due to normalization, the high bit 'H' is 1.
+ // 63 55 47 etc 15 7
+ // H210_9876_5432_1098_7654_etc_etc_etc_5432_1098_7654_3210
+ // ++++_++++_++++_++++_++++_etc_etc_etc_++++_+..._...._.... Kept bits.
+ // ...._...._...H_2109_8765_etc_etc_etc_6543_2109_8765_4321 After shifting.
+ // After, we have 53 bits (and bit #52 is this 'H' bit).
+ uint64_t mantissa53 = mantissa64 >> 11;
+
+ // Round up if the old bit #10 (the highest bit dropped by shifting) was set.
+ // We also fix any overflow from rounding up.
+ if (mantissa64 & 1024) {
+ mantissa53++;
+ if ((mantissa53 >> 53) != 0) {
+ mantissa53 >>= 1;
+ exp2++;
+ }
+ }
+
+ // Handle double-precision infinity (a nominal exponent of 1024) and
+ // subnormals (an exponent of -1023 and no implicit mantissa bit, bit #52).
+ if (exp2 >= 1024) {
+ mantissa53 = 0;
+ exp2 = 1024;
+ } else if ((mantissa53 >> 52) == 0) {
+ exp2 = -1023;
+ }
+
+ // Pack the bits and return.
+ const int32_t f64_bias = -1023;
+ uint64_t exp2_bits =
+ (uint64_t)((exp2 - f64_bias) & 0x07FF); // (1 << 11) - 1.
+ uint64_t bits = (mantissa53 & 0x000FFFFFFFFFFFFF) | // (1 << 52) - 1.
+ (exp2_bits << 52) | //
+ (negative ? 0x8000000000000000 : 0); // (1 << 63).
+ return wuffs_base__ieee_754_bit_representation__to_f64(bits);
+}
+
+// wuffs_base__private_implementation__medium_prec_bin__parse_number_f64
+// converts from an HPD to a double, using an MPB as scratch space. It returns
+// a NULL status.repr if there is no ambiguity in the truncation or rounding to
+// a float64 (an IEEE 754 double-precision floating point value).
+//
+// It may modify m even if it returns a non-NULL status.repr.
+static wuffs_base__result_f64 //
+wuffs_base__private_implementation__medium_prec_bin__parse_number_f64(
+ wuffs_base__private_implementation__medium_prec_bin* m,
+ const wuffs_base__private_implementation__high_prec_dec* h,
+ bool skip_fast_path_for_tests) {
+ do {
+ // m->mantissa is a uint64_t, which is an integer approximation to a
+ // rational value - h's underlying digits after m's normalization. This
+ // error is an upper bound on the difference between the approximate and
+ // actual value.
+ //
+ // The DiyFpStrtod function in https://github.com/google/double-conversion
+ // uses a finer grain (1/8th of the ULP, Unit in the Last Place) when
+ // tracking error. This implementation is coarser (1 ULP) but simpler.
+ //
+ // It is an error in the "numerical approximation" sense, not in the
+ // typical programming sense (as in "bad input" or "a result type").
+ uint64_t error = 0;
+
+ // Convert up to 19 decimal digits (in h->digits) to 64 binary digits (in
+ // m->mantissa): (1e19 < (1<<64)) and ((1<<64) < 1e20). If we have more
+ // than 19 digits, we're truncating (with error).
+ uint32_t i;
+ uint32_t i_end = h->num_digits;
+ if (i_end > 19) {
+ i_end = 19;
+ error = 1;
+ }
+ uint64_t mantissa = 0;
+ for (i = 0; i < i_end; i++) {
+ mantissa = (10 * mantissa) + h->digits[i];
+ }
+ m->mantissa = mantissa;
+ m->exp2 = 0;
+
+ // Check that exp10 lies in the (big_powers_of_10 + small_powers_of_10)
+ // range, -348 ..= +347, stepping big_powers_of_10 by 8 (which is 87
+ // triples) and small_powers_of_10 by 1 (which is 8 triples).
+ int32_t exp10 = h->decimal_point - ((int32_t)(i_end));
+ if (exp10 < -348) {
+ goto fail;
+ }
+ uint32_t bpo10 = ((uint32_t)(exp10 + 348)) / 8;
+ uint32_t spo10 = ((uint32_t)(exp10 + 348)) % 8;
+ if (bpo10 >= 87) {
+ goto fail;
+ }
+
+ // Try a fast path, if float64 math would be exact.
+ //
+ // 15 is such that 1e15 can be losslessly represented in a float64
+ // mantissa: (1e15 < (1<<53)) and ((1<<53) < 1e16).
+ //
+ // 22 is the maximum valid index for the
+ // wuffs_base__private_implementation__f64_powers_of_10 array.
+ do {
+ if (skip_fast_path_for_tests || ((mantissa >> 52) != 0)) {
+ break;
+ }
+ double d = (double)mantissa;
+
+ if (exp10 == 0) {
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = h->negative ? -d : +d;
+ return ret;
+
+ } else if (exp10 > 0) {
+ if (exp10 > 22) {
+ if (exp10 > (15 + 22)) {
+ break;
+ }
+ // If exp10 is in the range 23 ..= 37, try moving a few of the zeroes
+ // from the exponent to the mantissa. If we're still under 1e15, we
+ // haven't truncated any mantissa bits.
+ if (exp10 > 22) {
+ d *= wuffs_base__private_implementation__f64_powers_of_10[exp10 -
+ 22];
+ exp10 = 22;
+ if (d >= 1e15) {
+ break;
+ }
+ }
+ }
+ d *= wuffs_base__private_implementation__f64_powers_of_10[exp10];
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = h->negative ? -d : +d;
+ return ret;
+
+ } else { // "if (exp10 < 0)" is effectively "if (true)" here.
+ if (exp10 < -22) {
+ break;
+ }
+ d /= wuffs_base__private_implementation__f64_powers_of_10[-exp10];
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = h->negative ? -d : +d;
+ return ret;
+ }
+ } while (0);
+
+ // Normalize (and scale the error).
+ error <<= wuffs_base__private_implementation__medium_prec_bin__normalize(m);
+
+ // Multiplying two MPB values nominally multiplies two mantissas, call them
+ // A and B, which are integer approximations to the precise values (A+a)
+ // and (B+b) for some error terms a and b.
+ //
+ // MPB multiplication calculates (((A+a) * (B+b)) >> 64) to be ((A*B) >>
+ // 64). Shifting (truncating) and rounding introduces further error. The
+ // difference between the calculated result:
+ // ((A*B ) >> 64)
+ // and the true result:
+ // ((A*B + A*b + a*B + a*b) >> 64) + rounding_error
+ // is:
+ // (( A*b + a*B + a*b) >> 64) + rounding_error
+ // which can be re-grouped as:
+ // ((A*b) >> 64) + ((a*(B+b)) >> 64) + rounding_error
+ //
+ // Now, let A and a be "m->mantissa" and "error", and B and b be the
+ // pre-calculated power of 10. A and B are both less than (1 << 64), a is
+ // the "error" local variable and b is less than 1.
+ //
+ // An upper bound (in absolute value) on ((A*b) >> 64) is therefore 1.
+ //
+ // An upper bound on ((a*(B+b)) >> 64) is a, also known as error.
+ //
+ // Finally, the rounding_error is at most 1.
+ //
+ // In total, calling mpb__mul_pow_10 will raise the worst-case error by 2.
+ // The subsequent re-normalization can multiply that by a further factor.
+
+ // Multiply by small_powers_of_10[etc].
+ wuffs_base__private_implementation__medium_prec_bin__mul_pow_10(
+ m, &wuffs_base__private_implementation__small_powers_of_10[3 * spo10]);
+ error += 2;
+ error <<= wuffs_base__private_implementation__medium_prec_bin__normalize(m);
+
+ // Multiply by big_powers_of_10[etc].
+ wuffs_base__private_implementation__medium_prec_bin__mul_pow_10(
+ m, &wuffs_base__private_implementation__big_powers_of_10[3 * bpo10]);
+ error += 2;
+ error <<= wuffs_base__private_implementation__medium_prec_bin__normalize(m);
+
+ // We have a good approximation of h, but we still have to check whether
+ // the error is small enough. Equivalently, whether the number of surplus
+ // mantissa bits (the bits dropped when going from m's 64 mantissa bits to
+ // the smaller number of double-precision mantissa bits) would always round
+ // up or down, even when perturbed by ±error. We start at 11 surplus bits
+ // (m has 64, double-precision has 1+52), but it can be higher for
+ // subnormals.
+ //
+ // In many cases, the error is small enough and we return true.
+ const int32_t f64_bias = -1023;
+ int32_t subnormal_exp2 = f64_bias - 63;
+ uint32_t surplus_bits = 11;
+ if (subnormal_exp2 >= m->exp2) {
+ surplus_bits += 1 + ((uint32_t)(subnormal_exp2 - m->exp2));
+ }
+
+ uint64_t surplus_mask =
+ (((uint64_t)1) << surplus_bits) - 1; // e.g. 0x07FF.
+ uint64_t surplus = m->mantissa & surplus_mask;
+ uint64_t halfway = ((uint64_t)1) << (surplus_bits - 1); // e.g. 0x0400.
+
+ // Do the final calculation in *signed* arithmetic.
+ int64_t i_surplus = (int64_t)surplus;
+ int64_t i_halfway = (int64_t)halfway;
+ int64_t i_error = (int64_t)error;
+
+ if ((i_surplus > (i_halfway - i_error)) &&
+ (i_surplus < (i_halfway + i_error))) {
+ goto fail;
+ }
+
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = wuffs_base__private_implementation__medium_prec_bin__as_f64(
+ m, h->negative);
+ return ret;
+ } while (0);
+
+fail:
+ do {
+ wuffs_base__result_f64 ret;
+ ret.status.repr = "#base: mpb__parse_number_f64 failed";
+ ret.value = 0;
+ return ret;
+ } while (0);
+}
+
+// --------
+
+wuffs_base__result_f64 //
+wuffs_base__parse_number_f64_special(wuffs_base__slice_u8 s,
+ const char* fallback_status_repr) {
+ do {
+ uint8_t* p = s.ptr;
+ uint8_t* q = s.ptr + s.len;
+
+ for (; (p < q) && (*p == '_'); p++) {
+ }
+ if (p >= q) {
+ goto fallback;
+ }
+
+ // Parse sign.
+ bool negative = false;
+ do {
+ if (*p == '+') {
+ p++;
+ } else if (*p == '-') {
+ negative = true;
+ p++;
+ } else {
+ break;
+ }
+ for (; (p < q) && (*p == '_'); p++) {
+ }
+ } while (0);
+ if (p >= q) {
+ goto fallback;
+ }
+
+ bool nan = false;
+ switch (p[0]) {
+ case 'I':
+ case 'i':
+ if (((q - p) < 3) || //
+ ((p[1] != 'N') && (p[1] != 'n')) || //
+ ((p[2] != 'F') && (p[2] != 'f'))) {
+ goto fallback;
+ }
+ p += 3;
+
+ if ((p >= q) || (*p == '_')) {
+ break;
+ } else if (((q - p) < 5) || //
+ ((p[0] != 'I') && (p[0] != 'i')) || //
+ ((p[1] != 'N') && (p[1] != 'n')) || //
+ ((p[2] != 'I') && (p[2] != 'i')) || //
+ ((p[3] != 'T') && (p[3] != 't')) || //
+ ((p[4] != 'Y') && (p[4] != 'y'))) {
+ goto fallback;
+ }
+ p += 5;
+
+ if ((p >= q) || (*p == '_')) {
+ break;
+ }
+ goto fallback;
+
+ case 'N':
+ case 'n':
+ if (((q - p) < 3) || //
+ ((p[1] != 'A') && (p[1] != 'a')) || //
+ ((p[2] != 'N') && (p[2] != 'n'))) {
+ goto fallback;
+ }
+ p += 3;
+
+ if ((p >= q) || (*p == '_')) {
+ nan = true;
+ break;
+ }
+ goto fallback;
+
+ default:
+ goto fallback;
+ }
+
+ // Finish.
+ for (; (p < q) && (*p == '_'); p++) {
+ }
+ if (p != q) {
+ goto fallback;
+ }
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = wuffs_base__ieee_754_bit_representation__to_f64(
+ (nan ? 0x7FFFFFFFFFFFFFFF : 0x7FF0000000000000) |
+ (negative ? 0x8000000000000000 : 0));
+ return ret;
+ } while (0);
+
+fallback:
+ do {
+ wuffs_base__result_f64 ret;
+ ret.status.repr = fallback_status_repr;
+ ret.value = 0;
+ return ret;
+ } while (0);
+}
+
+wuffs_base__result_f64 //
+wuffs_base__parse_number_f64(wuffs_base__slice_u8 s) {
+ wuffs_base__private_implementation__medium_prec_bin m;
+ wuffs_base__private_implementation__high_prec_dec h;
+
+ do {
+ // powers converts decimal powers of 10 to binary powers of 2. For example,
+ // (10000 >> 13) is 1. It stops before the elements exceed 60, also known
+ // as WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL.
+ static const uint32_t num_powers = 19;
+ static const uint8_t powers[19] = {
+ 0, 3, 6, 9, 13, 16, 19, 23, 26, 29, //
+ 33, 36, 39, 43, 46, 49, 53, 56, 59, //
+ };
+
+ wuffs_base__status status =
+ wuffs_base__private_implementation__high_prec_dec__parse(&h, s);
+ if (status.repr) {
+ return wuffs_base__parse_number_f64_special(s, status.repr);
+ }
+
+ // Handle zero and obvious extremes. The largest and smallest positive
+ // finite f64 values are approximately 1.8e+308 and 4.9e-324.
+ if ((h.num_digits == 0) || (h.decimal_point < -326)) {
+ goto zero;
+ } else if (h.decimal_point > 310) {
+ goto infinity;
+ }
+
+ wuffs_base__result_f64 mpb_result =
+ wuffs_base__private_implementation__medium_prec_bin__parse_number_f64(
+ &m, &h, false);
+ if (mpb_result.status.repr == NULL) {
+ return mpb_result;
+ }
+
+ // Scale by powers of 2 until we're in the range [½ .. 1], which gives us
+ // our exponent (in base-2). First we shift right, possibly a little too
+ // far, ending with a value certainly below 1 and possibly below ½...
+ const int32_t f64_bias = -1023;
+ int32_t exp2 = 0;
+ while (h.decimal_point > 0) {
+ uint32_t n = (uint32_t)(+h.decimal_point);
+ uint32_t shift =
+ (n < num_powers)
+ ? powers[n]
+ : WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;
+
+ wuffs_base__private_implementation__high_prec_dec__small_rshift(&h,
+ shift);
+ if (h.decimal_point <
+ -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
+ goto zero;
+ }
+ exp2 += (int32_t)shift;
+ }
+ // ...then we shift left, putting us in [½ .. 1].
+ while (h.decimal_point <= 0) {
+ uint32_t shift;
+ if (h.decimal_point == 0) {
+ if (h.digits[0] >= 5) {
+ break;
+ }
+ shift = (h.digits[0] <= 2) ? 2 : 1;
+ } else {
+ uint32_t n = (uint32_t)(-h.decimal_point);
+ shift = (n < num_powers)
+ ? powers[n]
+ : WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;
+ }
+
+ wuffs_base__private_implementation__high_prec_dec__small_lshift(&h,
+ shift);
+ if (h.decimal_point >
+ +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
+ goto infinity;
+ }
+ exp2 -= (int32_t)shift;
+ }
+
+ // We're in the range [½ .. 1] but f64 uses [1 .. 2].
+ exp2--;
+
+ // The minimum normal exponent is (f64_bias + 1).
+ while ((f64_bias + 1) > exp2) {
+ uint32_t n = (uint32_t)((f64_bias + 1) - exp2);
+ if (n > WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL) {
+ n = WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;
+ }
+ wuffs_base__private_implementation__high_prec_dec__small_rshift(&h, n);
+ exp2 += (int32_t)n;
+ }
+
+ // Check for overflow.
+ if ((exp2 - f64_bias) >= 0x07FF) { // (1 << 11) - 1.
+ goto infinity;
+ }
+
+ // Extract 53 bits for the mantissa (in base-2).
+ wuffs_base__private_implementation__high_prec_dec__small_lshift(&h, 53);
+ uint64_t man2 =
+ wuffs_base__private_implementation__high_prec_dec__rounded_integer(&h);
+
+ // Rounding might have added one bit. If so, shift and re-check overflow.
+ if ((man2 >> 53) != 0) {
+ man2 >>= 1;
+ exp2++;
+ if ((exp2 - f64_bias) >= 0x07FF) { // (1 << 11) - 1.
+ goto infinity;
+ }
+ }
+
+ // Handle subnormal numbers.
+ if ((man2 >> 52) == 0) {
+ exp2 = f64_bias;
+ }
+
+ // Pack the bits and return.
+ uint64_t exp2_bits =
+ (uint64_t)((exp2 - f64_bias) & 0x07FF); // (1 << 11) - 1.
+ uint64_t bits = (man2 & 0x000FFFFFFFFFFFFF) | // (1 << 52) - 1.
+ (exp2_bits << 52) | //
+ (h.negative ? 0x8000000000000000 : 0); // (1 << 63).
+
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);
+ return ret;
+ } while (0);
+
+zero:
+ do {
+ uint64_t bits = h.negative ? 0x8000000000000000 : 0;
+
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);
+ return ret;
+ } while (0);
+
+infinity:
+ do {
+ uint64_t bits = h.negative ? 0xFFF0000000000000 : 0x7FF0000000000000;
+
+ wuffs_base__result_f64 ret;
+ ret.status.repr = NULL;
+ ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);
+ return ret;
+ } while (0);
+}
diff --git a/internal/cgen/base/image-impl.c b/internal/cgen/base/image-impl.c
index 413eec5..6f4baa1 100644
--- a/internal/cgen/base/image-impl.c
+++ b/internal/cgen/base/image-impl.c
@@ -23,51 +23,6 @@
// --------
-static uint64_t //
-wuffs_base__pixel_swizzler__squash_bgr_565_888(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 src) {
- size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
-
- size_t n = len4;
- while (n--) {
- uint32_t argb = wuffs_base__load_u32le__no_bounds_check(s);
- uint32_t b5 = 0x1F & (argb >> (8 - 5));
- uint32_t g6 = 0x3F & (argb >> (16 - 6));
- uint32_t r5 = 0x1F & (argb >> (24 - 5));
- uint32_t alpha = argb & 0xFF000000;
- wuffs_base__store_u32le__no_bounds_check(
- d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));
- s += 4;
- d += 4;
- }
- return len4 * 4;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 src) {
- size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
-
- size_t n = len4;
- while (n--) {
- uint8_t b0 = s[0];
- uint8_t b1 = s[1];
- uint8_t b2 = s[2];
- uint8_t b3 = s[3];
- d[0] = b2;
- d[1] = b1;
- d[2] = b0;
- d[3] = b3;
- s += 4;
- d += 4;
- }
- return len4 * 4;
-}
-
static inline uint32_t //
wuffs_base__swap_u32_argb_abgr(uint32_t u) {
uint32_t o = u & 0xFF00FF00;
@@ -78,152 +33,6 @@
// --------
-static inline uint32_t //
-wuffs_base__composite_nonpremul_nonpremul_u32_axxx(uint32_t dst_nonpremul,
- uint32_t src_nonpremul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
-
- // Convert dst from nonpremul to premul.
- dr = (dr * da) / 0xFFFF;
- dg = (dg * da) / 0xFFFF;
- db = (db * da) / 0xFFFF;
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert dst from premul to nonpremul.
- if (da != 0) {
- dr = (dr * 0xFFFF) / da;
- dg = (dg * 0xFFFF) / da;
- db = (db * 0xFFFF) / da;
- }
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-static inline uint32_t //
-wuffs_base__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,
- uint32_t src_premul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
-
- // Convert dst from nonpremul to premul.
- dr = (dr * da) / 0xFFFF;
- dg = (dg * da) / 0xFFFF;
- db = (db * da) / 0xFFFF;
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (premul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = sr + ((dr * ia) / 0xFFFF);
- dg = sg + ((dg * ia) / 0xFFFF);
- db = sb + ((db * ia) / 0xFFFF);
-
- // Convert dst from premul to nonpremul.
- if (da != 0) {
- dr = (dr * 0xFFFF) / da;
- dg = (dg * 0xFFFF) / da;
- db = (db * 0xFFFF) / da;
- }
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-static inline uint32_t //
-wuffs_base__composite_premul_nonpremul_u32_axxx(uint32_t dst_premul,
- uint32_t src_nonpremul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-static inline uint32_t //
-wuffs_base__composite_premul_premul_u32_axxx(uint32_t dst_premul,
- uint32_t src_premul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (premul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = sr + ((dr * ia) / 0xFFFF);
- dg = sg + ((dg * ia) / 0xFFFF);
- db = sb + ((db * ia) / 0xFFFF);
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-// --------
-
wuffs_base__color_u32_argb_premul //
wuffs_base__pixel_buffer__color_u32_at(const wuffs_base__pixel_buffer* pb,
uint32_t x,
@@ -447,985 +256,3 @@
return (uint8_t)best_index;
}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- return wuffs_base__slice_u8__copy_from_slice(dst, src);
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__copy_3_3(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t src_len3 = src.len / 3;
- size_t len = dst_len3 < src_len3 ? dst_len3 : src_len3;
- if (len > 0) {
- memmove(dst.ptr, src.ptr, len * 3);
- }
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__copy_4_4(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- if (len > 0) {
- memmove(dst.ptr, src.ptr, len * 4);
- }
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__bgr(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t src_len3 = src.len / 3;
- size_t len = dst_len2 < src_len3 ? dst_len2 : src_len3;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t b5 = s[0] >> 3;
- uint32_t g6 = s[1] >> 2;
- uint32_t r5 = s[2] >> 3;
- uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
-
- s += 1 * 3;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- wuffs_base__store_u16le__no_bounds_check(
- d + (0 * 2),
- wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
- wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
- wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)))));
-
- s += 1 * 4;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * ((uint32_t)s[3]);
- uint32_t sr = 0x101 * ((uint32_t)s[2]);
- uint32_t sg = 0x101 * ((uint32_t)s[1]);
- uint32_t sb = 0x101 * ((uint32_t)s[0]);
-
- // Convert from 565 color to 16-bit color.
- uint32_t old_rgb_565 = wuffs_base__load_u16le__no_bounds_check(d + (0 * 2));
- uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
- uint32_t dr = (0x8421 * old_r5) >> 4;
- uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
- uint32_t dg = (0x1041 * old_g6) >> 2;
- uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
- uint32_t db = (0x8421 * old_b5) >> 4;
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert from 16-bit color to 565 color and combine the components.
- uint32_t new_r5 = 0x1F & (dr >> 11);
- uint32_t new_g6 = 0x3F & (dg >> 10);
- uint32_t new_b5 = 0x1F & (db >> 11);
- uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2),
- (uint16_t)new_rgb_565);
-
- s += 1 * 4;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__y(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t len = dst_len2 < src.len ? dst_len2 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t y5 = s[0] >> 3;
- uint32_t y6 = s[0] >> 2;
- uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
-
- s += 1 * 1;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__index__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len2 = dst.len / 2;
- size_t len = dst_len2 < src.len ? dst_len2 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- wuffs_base__store_u16le__no_bounds_check(
- d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
- wuffs_base__store_u16le__no_bounds_check(
- d + (1 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[1] * 4)));
- wuffs_base__store_u16le__no_bounds_check(
- d + (2 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[2] * 4)));
- wuffs_base__store_u16le__no_bounds_check(
- d + (3 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[3] * 4)));
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 2;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- wuffs_base__store_u16le__no_bounds_check(
- d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
-
- s += 1 * 1;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len2 = dst.len / 2;
- size_t len = dst_len2 < src.len ? dst_len2 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)s0);
- }
-
- s += 1 * 1;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t s0 =
- wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
- wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)));
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
-
- s += 1 * 4;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * ((uint32_t)s[3]);
- uint32_t sr = 0x101 * ((uint32_t)s[2]);
- uint32_t sg = 0x101 * ((uint32_t)s[1]);
- uint32_t sb = 0x101 * ((uint32_t)s[0]);
- uint32_t dr = 0x101 * ((uint32_t)d[2]);
- uint32_t dg = 0x101 * ((uint32_t)d[1]);
- uint32_t db = 0x101 * ((uint32_t)d[0]);
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert from 16-bit color to 8-bit color.
- d[0] = (uint8_t)(db >> 8);
- d[1] = (uint8_t)(dg >> 8);
- d[2] = (uint8_t)(dr >> 8);
-
- s += 1 * 4;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4),
- wuffs_base__composite_nonpremul_nonpremul_u32_axxx(d0, s0));
-
- s += 1 * 4;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4),
- wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));
-
- s += 1 * 4;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), wuffs_base__composite_premul_nonpremul_u32_axxx(d0, s0));
-
- s += 1 * 4;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxx__index__src(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len3 = dst.len / 3;
- size_t len = dst_len3 < src.len ? dst_len3 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- // The comparison in the while condition is ">", not ">=", because with
- // ">=", the last 4-byte store could write past the end of the dst slice.
- //
- // Each 4-byte store writes one too many bytes, but a subsequent store
- // will overwrite that with the correct byte. There is always another
- // store, whether a 4-byte store in this loop or a 1-byte store in the
- // next loop.
- while (n > loop_unroll_count) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (1 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[1] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (2 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[2] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (3 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[3] * 4)));
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 3;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
-
- s += 1 * 1;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len3 = dst.len / 3;
- size_t len = dst_len3 < src.len ? dst_len3 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
- }
- uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[1] * 4));
- if (s1) {
- wuffs_base__store_u24le__no_bounds_check(d + (1 * 3), s1);
- }
- uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[2] * 4));
- if (s2) {
- wuffs_base__store_u24le__no_bounds_check(d + (2 * 3), s2);
- }
- uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[3] * 4));
- if (s3) {
- wuffs_base__store_u24le__no_bounds_check(d + (3 * 3), s3);
- }
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 3;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
- }
-
- s += 1 * 1;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxx__y(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t len = dst_len3 < src.len ? dst_len3 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint8_t s0 = s[0];
- d[0] = s0;
- d[1] = s0;
- d[2] = s0;
-
- s += 1 * 1;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__index__src(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len4 = dst.len / 4;
- size_t len = dst_len4 < src.len ? dst_len4 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (1 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[1] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (2 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[2] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (3 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[3] * 4)));
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 4;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
-
- s += 1 * 1;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len4 = dst.len / 4;
- size_t len = dst_len4 < src.len ? dst_len4 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
- }
- uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[1] * 4));
- if (s1) {
- wuffs_base__store_u32le__no_bounds_check(d + (1 * 4), s1);
- }
- uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[2] * 4));
- if (s2) {
- wuffs_base__store_u32le__no_bounds_check(d + (2 * 4), s2);
- }
- uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[3] * 4));
- if (s3) {
- wuffs_base__store_u32le__no_bounds_check(d + (3 * 4), s3);
- }
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 4;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
- }
-
- s += 1 * 1;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__xxx(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len3 = src.len / 3;
- size_t len = dst_len4 < src_len3 ? dst_len4 : src_len3;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4),
- 0xFF000000 | wuffs_base__load_u24le__no_bounds_check(s + (0 * 3)));
-
- s += 1 * 3;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__y(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t len = dst_len4 < src.len ? dst_len4 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));
-
- s += 1 * 1;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__y(wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- return wuffs_base__pixel_swizzler__bgr_565__y;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- return wuffs_base__pixel_swizzler__xxx__y;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__BGRX:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__RGBX:
- return wuffs_base__pixel_swizzler__xxxx__y;
- }
- return NULL;
-}
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
- wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
- if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
- 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__copy_1_1;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- if (wuffs_base__pixel_swizzler__squash_bgr_565_888(dst_palette,
- src_palette) != 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgr_565__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
- 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
- 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
- src_palette) != 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
- src_palette) != 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
- }
- return NULL;
- }
- return NULL;
-}
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__bgr(wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- return wuffs_base__pixel_swizzler__bgr_565__bgr;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- return wuffs_base__pixel_swizzler__copy_3_3;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__BGRX:
- return wuffs_base__pixel_swizzler__xxxx__xxx;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__RGBX:
- // TODO.
- break;
- }
- return NULL;
-}
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
- wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__copy_4_4;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__BGRX:
- // TODO.
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__RGBX:
- // TODO.
- break;
- }
- return NULL;
-}
-
-// --------
-
-wuffs_base__status //
-wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__pixel_format src_format,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- if (!p) {
- return wuffs_base__make_status(wuffs_base__error__bad_receiver);
- }
-
- // TODO: support many more formats.
-
- wuffs_base__pixel_swizzler__func func = NULL;
-
- switch (src_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__Y:
- func = wuffs_base__pixel_swizzler__prepare__y(p, dst_format, dst_palette,
- src_palette, blend);
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
- func = wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
- p, dst_format, dst_palette, src_palette, blend);
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- func = wuffs_base__pixel_swizzler__prepare__bgr(
- p, dst_format, dst_palette, src_palette, blend);
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- func = wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
- p, dst_format, dst_palette, src_palette, blend);
- break;
- }
-
- p->private_impl.func = func;
- return wuffs_base__make_status(
- func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);
-}
-
-uint64_t //
-wuffs_base__pixel_swizzler__swizzle_interleaved(
- const wuffs_base__pixel_swizzler* p,
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (p && p->private_impl.func) {
- return (*p->private_impl.func)(dst, dst_palette, src);
- }
- return 0;
-}
diff --git a/internal/cgen/base/pixconv-submodule.c b/internal/cgen/base/pixconv-submodule.c
new file mode 100644
index 0000000..1e065bd
--- /dev/null
+++ b/internal/cgen/base/pixconv-submodule.c
@@ -0,0 +1,1190 @@
+// After editing this file, run "go generate" in the parent directory.
+
+// Copyright 2017 The Wuffs Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// ---------------- Pixel Swizzler
+
+static inline uint32_t //
+wuffs_base__composite_nonpremul_nonpremul_u32_axxx(uint32_t dst_nonpremul,
+ uint32_t src_nonpremul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
+
+ // Convert dst from nonpremul to premul.
+ dr = (dr * da) / 0xFFFF;
+ dg = (dg * da) / 0xFFFF;
+ db = (db * da) / 0xFFFF;
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert dst from premul to nonpremul.
+ if (da != 0) {
+ dr = (dr * 0xFFFF) / da;
+ dg = (dg * 0xFFFF) / da;
+ db = (db * 0xFFFF) / da;
+ }
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+static inline uint32_t //
+wuffs_base__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,
+ uint32_t src_premul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
+
+ // Convert dst from nonpremul to premul.
+ dr = (dr * da) / 0xFFFF;
+ dg = (dg * da) / 0xFFFF;
+ db = (db * da) / 0xFFFF;
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (premul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = sr + ((dr * ia) / 0xFFFF);
+ dg = sg + ((dg * ia) / 0xFFFF);
+ db = sb + ((db * ia) / 0xFFFF);
+
+ // Convert dst from premul to nonpremul.
+ if (da != 0) {
+ dr = (dr * 0xFFFF) / da;
+ dg = (dg * 0xFFFF) / da;
+ db = (db * 0xFFFF) / da;
+ }
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+static inline uint32_t //
+wuffs_base__composite_premul_nonpremul_u32_axxx(uint32_t dst_premul,
+ uint32_t src_nonpremul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+static inline uint32_t //
+wuffs_base__composite_premul_premul_u32_axxx(uint32_t dst_premul,
+ uint32_t src_premul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (premul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = sr + ((dr * ia) / 0xFFFF);
+ dg = sg + ((dg * ia) / 0xFFFF);
+ db = sb + ((db * ia) / 0xFFFF);
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__squash_bgr_565_888(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 src) {
+ size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+
+ size_t n = len4;
+ while (n--) {
+ uint32_t argb = wuffs_base__load_u32le__no_bounds_check(s);
+ uint32_t b5 = 0x1F & (argb >> (8 - 5));
+ uint32_t g6 = 0x3F & (argb >> (16 - 6));
+ uint32_t r5 = 0x1F & (argb >> (24 - 5));
+ uint32_t alpha = argb & 0xFF000000;
+ wuffs_base__store_u32le__no_bounds_check(
+ d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));
+ s += 4;
+ d += 4;
+ }
+ return len4 * 4;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 src) {
+ size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+
+ size_t n = len4;
+ while (n--) {
+ uint8_t b0 = s[0];
+ uint8_t b1 = s[1];
+ uint8_t b2 = s[2];
+ uint8_t b3 = s[3];
+ d[0] = b2;
+ d[1] = b1;
+ d[2] = b0;
+ d[3] = b3;
+ s += 4;
+ d += 4;
+ }
+ return len4 * 4;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ return wuffs_base__slice_u8__copy_from_slice(dst, src);
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__copy_3_3(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t src_len3 = src.len / 3;
+ size_t len = dst_len3 < src_len3 ? dst_len3 : src_len3;
+ if (len > 0) {
+ memmove(dst.ptr, src.ptr, len * 3);
+ }
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__copy_4_4(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ if (len > 0) {
+ memmove(dst.ptr, src.ptr, len * 4);
+ }
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__bgr(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t src_len3 = src.len / 3;
+ size_t len = dst_len2 < src_len3 ? dst_len2 : src_len3;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t b5 = s[0] >> 3;
+ uint32_t g6 = s[1] >> 2;
+ uint32_t r5 = s[2] >> 3;
+ uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
+
+ s += 1 * 3;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (0 * 2),
+ wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
+ wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
+ wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)))));
+
+ s += 1 * 4;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * ((uint32_t)s[3]);
+ uint32_t sr = 0x101 * ((uint32_t)s[2]);
+ uint32_t sg = 0x101 * ((uint32_t)s[1]);
+ uint32_t sb = 0x101 * ((uint32_t)s[0]);
+
+ // Convert from 565 color to 16-bit color.
+ uint32_t old_rgb_565 = wuffs_base__load_u16le__no_bounds_check(d + (0 * 2));
+ uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
+ uint32_t dr = (0x8421 * old_r5) >> 4;
+ uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
+ uint32_t dg = (0x1041 * old_g6) >> 2;
+ uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
+ uint32_t db = (0x8421 * old_b5) >> 4;
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert from 16-bit color to 565 color and combine the components.
+ uint32_t new_r5 = 0x1F & (dr >> 11);
+ uint32_t new_g6 = 0x3F & (dg >> 10);
+ uint32_t new_b5 = 0x1F & (db >> 11);
+ uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2),
+ (uint16_t)new_rgb_565);
+
+ s += 1 * 4;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__y(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t len = dst_len2 < src.len ? dst_len2 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t y5 = s[0] >> 3;
+ uint32_t y6 = s[0] >> 2;
+ uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
+
+ s += 1 * 1;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__index__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len2 = dst.len / 2;
+ size_t len = dst_len2 < src.len ? dst_len2 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (1 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[1] * 4)));
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (2 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[2] * 4)));
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (3 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[3] * 4)));
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 2;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+
+ s += 1 * 1;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len2 = dst.len / 2;
+ size_t len = dst_len2 < src.len ? dst_len2 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)s0);
+ }
+
+ s += 1 * 1;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t s0 =
+ wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
+ wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)));
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+
+ s += 1 * 4;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * ((uint32_t)s[3]);
+ uint32_t sr = 0x101 * ((uint32_t)s[2]);
+ uint32_t sg = 0x101 * ((uint32_t)s[1]);
+ uint32_t sb = 0x101 * ((uint32_t)s[0]);
+ uint32_t dr = 0x101 * ((uint32_t)d[2]);
+ uint32_t dg = 0x101 * ((uint32_t)d[1]);
+ uint32_t db = 0x101 * ((uint32_t)d[0]);
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert from 16-bit color to 8-bit color.
+ d[0] = (uint8_t)(db >> 8);
+ d[1] = (uint8_t)(dg >> 8);
+ d[2] = (uint8_t)(dr >> 8);
+
+ s += 1 * 4;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4),
+ wuffs_base__composite_nonpremul_nonpremul_u32_axxx(d0, s0));
+
+ s += 1 * 4;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4),
+ wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));
+
+ s += 1 * 4;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), wuffs_base__composite_premul_nonpremul_u32_axxx(d0, s0));
+
+ s += 1 * 4;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxx__index__src(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len3 = dst.len / 3;
+ size_t len = dst_len3 < src.len ? dst_len3 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ // The comparison in the while condition is ">", not ">=", because with
+ // ">=", the last 4-byte store could write past the end of the dst slice.
+ //
+ // Each 4-byte store writes one too many bytes, but a subsequent store
+ // will overwrite that with the correct byte. There is always another
+ // store, whether a 4-byte store in this loop or a 1-byte store in the
+ // next loop.
+ while (n > loop_unroll_count) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (1 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[1] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (2 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[2] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (3 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[3] * 4)));
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 3;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+
+ s += 1 * 1;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len3 = dst.len / 3;
+ size_t len = dst_len3 < src.len ? dst_len3 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+ }
+ uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[1] * 4));
+ if (s1) {
+ wuffs_base__store_u24le__no_bounds_check(d + (1 * 3), s1);
+ }
+ uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[2] * 4));
+ if (s2) {
+ wuffs_base__store_u24le__no_bounds_check(d + (2 * 3), s2);
+ }
+ uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[3] * 4));
+ if (s3) {
+ wuffs_base__store_u24le__no_bounds_check(d + (3 * 3), s3);
+ }
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 3;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+ }
+
+ s += 1 * 1;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxx__y(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t len = dst_len3 < src.len ? dst_len3 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint8_t s0 = s[0];
+ d[0] = s0;
+ d[1] = s0;
+ d[2] = s0;
+
+ s += 1 * 1;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__index__src(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len4 = dst.len / 4;
+ size_t len = dst_len4 < src.len ? dst_len4 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (1 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[1] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (2 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[2] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (3 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[3] * 4)));
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 4;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+
+ s += 1 * 1;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len4 = dst.len / 4;
+ size_t len = dst_len4 < src.len ? dst_len4 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
+ }
+ uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[1] * 4));
+ if (s1) {
+ wuffs_base__store_u32le__no_bounds_check(d + (1 * 4), s1);
+ }
+ uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[2] * 4));
+ if (s2) {
+ wuffs_base__store_u32le__no_bounds_check(d + (2 * 4), s2);
+ }
+ uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[3] * 4));
+ if (s3) {
+ wuffs_base__store_u32le__no_bounds_check(d + (3 * 4), s3);
+ }
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 4;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
+ }
+
+ s += 1 * 1;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__xxx(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len3 = src.len / 3;
+ size_t len = dst_len4 < src_len3 ? dst_len4 : src_len3;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4),
+ 0xFF000000 | wuffs_base__load_u24le__no_bounds_check(s + (0 * 3)));
+
+ s += 1 * 3;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__y(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t len = dst_len4 < src.len ? dst_len4 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));
+
+ s += 1 * 1;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__y(wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ return wuffs_base__pixel_swizzler__bgr_565__y;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ return wuffs_base__pixel_swizzler__xxx__y;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRX:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBX:
+ return wuffs_base__pixel_swizzler__xxxx__y;
+ }
+ return NULL;
+}
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
+ wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
+ if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
+ 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__copy_1_1;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ if (wuffs_base__pixel_swizzler__squash_bgr_565_888(dst_palette,
+ src_palette) != 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgr_565__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
+ 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
+ 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
+ src_palette) != 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
+ src_palette) != 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+ }
+ return NULL;
+}
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__bgr(wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ return wuffs_base__pixel_swizzler__bgr_565__bgr;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ return wuffs_base__pixel_swizzler__copy_3_3;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRX:
+ return wuffs_base__pixel_swizzler__xxxx__xxx;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBX:
+ // TODO.
+ break;
+ }
+ return NULL;
+}
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
+ wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__copy_4_4;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRX:
+ // TODO.
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBX:
+ // TODO.
+ break;
+ }
+ return NULL;
+}
+
+// --------
+
+wuffs_base__status //
+wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__pixel_format src_format,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ if (!p) {
+ return wuffs_base__make_status(wuffs_base__error__bad_receiver);
+ }
+
+ // TODO: support many more formats.
+
+ wuffs_base__pixel_swizzler__func func = NULL;
+
+ switch (src_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__Y:
+ func = wuffs_base__pixel_swizzler__prepare__y(p, dst_format, dst_palette,
+ src_palette, blend);
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
+ func = wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
+ p, dst_format, dst_palette, src_palette, blend);
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ func = wuffs_base__pixel_swizzler__prepare__bgr(
+ p, dst_format, dst_palette, src_palette, blend);
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ func = wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
+ p, dst_format, dst_palette, src_palette, blend);
+ break;
+ }
+
+ p->private_impl.func = func;
+ return wuffs_base__make_status(
+ func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);
+}
+
+uint64_t //
+wuffs_base__pixel_swizzler__swizzle_interleaved(
+ const wuffs_base__pixel_swizzler* p,
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (p && p->private_impl.func) {
+ return (*p->private_impl.func)(dst, dst_palette, src);
+ }
+ return 0;
+}
diff --git a/internal/cgen/base/strconv-impl.c b/internal/cgen/base/strconv-impl.c
index 06710a1..9d29040 100644
--- a/internal/cgen/base/strconv-impl.c
+++ b/internal/cgen/base/strconv-impl.c
@@ -299,1255 +299,6 @@
} while (0);
}
- // ---------------- IEEE 754 Floating Point
-
-#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE 1023
-#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION 500
-
-// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL is the largest N
-// such that ((10 << N) < (1 << 64)).
-#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL 60
-
-// wuffs_base__private_implementation__high_prec_dec (abbreviated as HPD) is a
-// fixed precision floating point decimal number, augmented with ±infinity
-// values, but it cannot represent NaN (Not a Number).
-//
-// "High precision" means that the mantissa holds 500 decimal digits. 500 is
-// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION.
-//
-// An HPD isn't for general purpose arithmetic, only for conversions to and
-// from IEEE 754 double-precision floating point, where the largest and
-// smallest positive, finite values are approximately 1.8e+308 and 4.9e-324.
-// HPD exponents above +1023 mean infinity, below -1023 mean zero. The ±1023
-// bounds are further away from zero than ±(324 + 500), where 500 and 1023 is
-// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION and
-// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE.
-//
-// digits[.. num_digits] are the number's digits in big-endian order. The
-// uint8_t values are in the range [0 ..= 9], not ['0' ..= '9'], where e.g. '7'
-// is the ASCII value 0x37.
-//
-// decimal_point is the index (within digits) of the decimal point. It may be
-// negative or be larger than num_digits, in which case the explicit digits are
-// padded with implicit zeroes.
-//
-// For example, if num_digits is 3 and digits is "\x07\x08\x09":
-// - A decimal_point of -2 means ".00789"
-// - A decimal_point of -1 means ".0789"
-// - A decimal_point of +0 means ".789"
-// - A decimal_point of +1 means "7.89"
-// - A decimal_point of +2 means "78.9"
-// - A decimal_point of +3 means "789."
-// - A decimal_point of +4 means "7890."
-// - A decimal_point of +5 means "78900."
-//
-// As above, a decimal_point higher than +1023 means that the overall value is
-// infinity, lower than -1023 means zero.
-//
-// negative is a sign bit. An HPD can distinguish positive and negative zero.
-//
-// truncated is whether there are more than
-// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION digits, and at
-// least one of those extra digits are non-zero. The existence of long-tail
-// digits can affect rounding.
-//
-// The "all fields are zero" value is valid, and represents the number +0.
-typedef struct {
- uint32_t num_digits;
- int32_t decimal_point;
- bool negative;
- bool truncated;
- uint8_t digits[WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION];
-} wuffs_base__private_implementation__high_prec_dec;
-
-// wuffs_base__private_implementation__high_prec_dec__trim trims trailing
-// zeroes from the h->digits[.. h->num_digits] slice. They have no benefit,
-// since we explicitly track h->decimal_point.
-//
-// Preconditions:
-// - h is non-NULL.
-static inline void //
-wuffs_base__private_implementation__high_prec_dec__trim(
- wuffs_base__private_implementation__high_prec_dec* h) {
- while ((h->num_digits > 0) && (h->digits[h->num_digits - 1] == 0)) {
- h->num_digits--;
- }
-}
-
-static wuffs_base__status //
-wuffs_base__private_implementation__high_prec_dec__parse(
- wuffs_base__private_implementation__high_prec_dec* h,
- wuffs_base__slice_u8 s) {
- if (!h) {
- return wuffs_base__make_status(wuffs_base__error__bad_receiver);
- }
- h->num_digits = 0;
- h->decimal_point = 0;
- h->negative = false;
- h->truncated = false;
-
- uint8_t* p = s.ptr;
- uint8_t* q = s.ptr + s.len;
-
- for (; (p < q) && (*p == '_'); p++) {
- }
- if (p >= q) {
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
-
- // Parse sign.
- do {
- if (*p == '+') {
- p++;
- } else if (*p == '-') {
- h->negative = true;
- p++;
- } else {
- break;
- }
- for (; (p < q) && (*p == '_'); p++) {
- }
- } while (0);
-
- // Parse digits.
- uint32_t nd = 0;
- int32_t dp = 0;
- bool saw_digits = false;
- bool saw_non_zero_digits = false;
- bool saw_dot = false;
- for (; p < q; p++) {
- if (*p == '_') {
- // No-op.
-
- } else if ((*p == '.') || (*p == ',')) {
- // As per https://en.wikipedia.org/wiki/Decimal_separator, both '.' or
- // ',' are commonly used. We just parse either, regardless of LOCALE.
- if (saw_dot) {
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
- saw_dot = true;
- dp = (int32_t)nd;
-
- } else if ('0' == *p) {
- if (!saw_dot && !saw_non_zero_digits && saw_digits) {
- // We don't allow unnecessary leading zeroes: "000123" or "0644".
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
- saw_digits = true;
- if (nd == 0) {
- // Track leading zeroes implicitly.
- dp--;
- } else if (nd <
- WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
- h->digits[nd++] = 0;
- } else {
- // Long-tail zeroes are ignored.
- }
-
- } else if (('0' < *p) && (*p <= '9')) {
- if (!saw_dot && !saw_non_zero_digits && saw_digits) {
- // We don't allow unnecessary leading zeroes: "000123" or "0644".
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
- saw_digits = true;
- saw_non_zero_digits = true;
- if (nd < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
- h->digits[nd++] = (uint8_t)(*p - '0');
- } else {
- // Long-tail non-zeroes set the truncated bit.
- h->truncated = true;
- }
-
- } else {
- break;
- }
- }
-
- if (!saw_digits) {
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
- if (!saw_dot) {
- dp = (int32_t)nd;
- }
-
- // Parse exponent.
- if ((p < q) && ((*p == 'E') || (*p == 'e'))) {
- p++;
- for (; (p < q) && (*p == '_'); p++) {
- }
- if (p >= q) {
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
-
- int32_t exp_sign = +1;
- if (*p == '+') {
- p++;
- } else if (*p == '-') {
- exp_sign = -1;
- p++;
- }
-
- int32_t exp = 0;
- const int32_t exp_large =
- WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE +
- WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION;
- bool saw_exp_digits = false;
- for (; p < q; p++) {
- if (*p == '_') {
- // No-op.
- } else if (('0' <= *p) && (*p <= '9')) {
- saw_exp_digits = true;
- if (exp < exp_large) {
- exp = (10 * exp) + ((int32_t)(*p - '0'));
- }
- } else {
- break;
- }
- }
- if (!saw_exp_digits) {
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
- dp += exp_sign * exp;
- }
-
- // Finish.
- if (p != q) {
- return wuffs_base__make_status(wuffs_base__error__bad_argument);
- }
- h->num_digits = nd;
- if (nd == 0) {
- h->decimal_point = 0;
- } else if (dp <
- -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
- h->decimal_point =
- -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE - 1;
- } else if (dp >
- +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
- h->decimal_point =
- +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE + 1;
- } else {
- h->decimal_point = dp;
- }
- wuffs_base__private_implementation__high_prec_dec__trim(h);
- return wuffs_base__make_status(NULL);
-}
-
-// --------
-
-// The etc__hpd_left_shift and etc__powers_of_5 tables were printed by
-// script/print-hpd-left-shift.go. That script has an optional -comments flag,
-// whose output is not copied here, which prints further detail.
-//
-// These tables are used in
-// wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits.
-
-// wuffs_base__private_implementation__hpd_left_shift[i] encodes the number of
-// new digits created after multiplying a positive integer by (1 << i): the
-// additional length in the decimal representation. For example, shifting "234"
-// by 3 (equivalent to multiplying by 8) will produce "1872". Going from a
-// 3-length string to a 4-length string means that 1 new digit was added (and
-// existing digits may have changed).
-//
-// Shifting by i can add either N or N-1 new digits, depending on whether the
-// original positive integer compares >= or < to the i'th power of 5 (as 10
-// equals 2 * 5). Comparison is lexicographic, not numerical.
-//
-// For example, shifting by 4 (i.e. multiplying by 16) can add 1 or 2 new
-// digits, depending on a lexicographic comparison to (5 ** 4), i.e. "625":
-// - ("1" << 4) is "16", which adds 1 new digit.
-// - ("5678" << 4) is "90848", which adds 1 new digit.
-// - ("624" << 4) is "9984", which adds 1 new digit.
-// - ("62498" << 4) is "999968", which adds 1 new digit.
-// - ("625" << 4) is "10000", which adds 2 new digits.
-// - ("625001" << 4) is "10000016", which adds 2 new digits.
-// - ("7008" << 4) is "112128", which adds 2 new digits.
-// - ("99" << 4) is "1584", which adds 2 new digits.
-//
-// Thus, when i is 4, N is 2 and (5 ** i) is "625". This etc__hpd_left_shift
-// array encodes this as:
-// - etc__hpd_left_shift[4] is 0x1006 = (2 << 11) | 0x0006.
-// - etc__hpd_left_shift[5] is 0x1009 = (? << 11) | 0x0009.
-// where the ? isn't relevant for i == 4.
-//
-// The high 5 bits of etc__hpd_left_shift[i] is N, the higher of the two
-// possible number of new digits. The low 11 bits are an offset into the
-// etc__powers_of_5 array (of length 0x051C, so offsets fit in 11 bits). When i
-// is 4, its offset and the next one is 6 and 9, and etc__powers_of_5[6 .. 9]
-// is the string "\x06\x02\x05", so the relevant power of 5 is "625".
-//
-// Thanks to Ken Thompson for the original idea.
-static const uint16_t wuffs_base__private_implementation__hpd_left_shift[65] = {
- 0x0000, 0x0800, 0x0801, 0x0803, 0x1006, 0x1009, 0x100D, 0x1812, 0x1817,
- 0x181D, 0x2024, 0x202B, 0x2033, 0x203C, 0x2846, 0x2850, 0x285B, 0x3067,
- 0x3073, 0x3080, 0x388E, 0x389C, 0x38AB, 0x38BB, 0x40CC, 0x40DD, 0x40EF,
- 0x4902, 0x4915, 0x4929, 0x513E, 0x5153, 0x5169, 0x5180, 0x5998, 0x59B0,
- 0x59C9, 0x61E3, 0x61FD, 0x6218, 0x6A34, 0x6A50, 0x6A6D, 0x6A8B, 0x72AA,
- 0x72C9, 0x72E9, 0x7B0A, 0x7B2B, 0x7B4D, 0x8370, 0x8393, 0x83B7, 0x83DC,
- 0x8C02, 0x8C28, 0x8C4F, 0x9477, 0x949F, 0x94C8, 0x9CF2, 0x051C, 0x051C,
- 0x051C, 0x051C,
-};
-
-// wuffs_base__private_implementation__powers_of_5 contains the powers of 5,
-// concatenated together: "5", "25", "125", "625", "3125", etc.
-static const uint8_t wuffs_base__private_implementation__powers_of_5[0x051C] = {
- 5, 2, 5, 1, 2, 5, 6, 2, 5, 3, 1, 2, 5, 1, 5, 6, 2, 5, 7, 8, 1, 2, 5, 3, 9,
- 0, 6, 2, 5, 1, 9, 5, 3, 1, 2, 5, 9, 7, 6, 5, 6, 2, 5, 4, 8, 8, 2, 8, 1, 2,
- 5, 2, 4, 4, 1, 4, 0, 6, 2, 5, 1, 2, 2, 0, 7, 0, 3, 1, 2, 5, 6, 1, 0, 3, 5,
- 1, 5, 6, 2, 5, 3, 0, 5, 1, 7, 5, 7, 8, 1, 2, 5, 1, 5, 2, 5, 8, 7, 8, 9, 0,
- 6, 2, 5, 7, 6, 2, 9, 3, 9, 4, 5, 3, 1, 2, 5, 3, 8, 1, 4, 6, 9, 7, 2, 6, 5,
- 6, 2, 5, 1, 9, 0, 7, 3, 4, 8, 6, 3, 2, 8, 1, 2, 5, 9, 5, 3, 6, 7, 4, 3, 1,
- 6, 4, 0, 6, 2, 5, 4, 7, 6, 8, 3, 7, 1, 5, 8, 2, 0, 3, 1, 2, 5, 2, 3, 8, 4,
- 1, 8, 5, 7, 9, 1, 0, 1, 5, 6, 2, 5, 1, 1, 9, 2, 0, 9, 2, 8, 9, 5, 5, 0, 7,
- 8, 1, 2, 5, 5, 9, 6, 0, 4, 6, 4, 4, 7, 7, 5, 3, 9, 0, 6, 2, 5, 2, 9, 8, 0,
- 2, 3, 2, 2, 3, 8, 7, 6, 9, 5, 3, 1, 2, 5, 1, 4, 9, 0, 1, 1, 6, 1, 1, 9, 3,
- 8, 4, 7, 6, 5, 6, 2, 5, 7, 4, 5, 0, 5, 8, 0, 5, 9, 6, 9, 2, 3, 8, 2, 8, 1,
- 2, 5, 3, 7, 2, 5, 2, 9, 0, 2, 9, 8, 4, 6, 1, 9, 1, 4, 0, 6, 2, 5, 1, 8, 6,
- 2, 6, 4, 5, 1, 4, 9, 2, 3, 0, 9, 5, 7, 0, 3, 1, 2, 5, 9, 3, 1, 3, 2, 2, 5,
- 7, 4, 6, 1, 5, 4, 7, 8, 5, 1, 5, 6, 2, 5, 4, 6, 5, 6, 6, 1, 2, 8, 7, 3, 0,
- 7, 7, 3, 9, 2, 5, 7, 8, 1, 2, 5, 2, 3, 2, 8, 3, 0, 6, 4, 3, 6, 5, 3, 8, 6,
- 9, 6, 2, 8, 9, 0, 6, 2, 5, 1, 1, 6, 4, 1, 5, 3, 2, 1, 8, 2, 6, 9, 3, 4, 8,
- 1, 4, 4, 5, 3, 1, 2, 5, 5, 8, 2, 0, 7, 6, 6, 0, 9, 1, 3, 4, 6, 7, 4, 0, 7,
- 2, 2, 6, 5, 6, 2, 5, 2, 9, 1, 0, 3, 8, 3, 0, 4, 5, 6, 7, 3, 3, 7, 0, 3, 6,
- 1, 3, 2, 8, 1, 2, 5, 1, 4, 5, 5, 1, 9, 1, 5, 2, 2, 8, 3, 6, 6, 8, 5, 1, 8,
- 0, 6, 6, 4, 0, 6, 2, 5, 7, 2, 7, 5, 9, 5, 7, 6, 1, 4, 1, 8, 3, 4, 2, 5, 9,
- 0, 3, 3, 2, 0, 3, 1, 2, 5, 3, 6, 3, 7, 9, 7, 8, 8, 0, 7, 0, 9, 1, 7, 1, 2,
- 9, 5, 1, 6, 6, 0, 1, 5, 6, 2, 5, 1, 8, 1, 8, 9, 8, 9, 4, 0, 3, 5, 4, 5, 8,
- 5, 6, 4, 7, 5, 8, 3, 0, 0, 7, 8, 1, 2, 5, 9, 0, 9, 4, 9, 4, 7, 0, 1, 7, 7,
- 2, 9, 2, 8, 2, 3, 7, 9, 1, 5, 0, 3, 9, 0, 6, 2, 5, 4, 5, 4, 7, 4, 7, 3, 5,
- 0, 8, 8, 6, 4, 6, 4, 1, 1, 8, 9, 5, 7, 5, 1, 9, 5, 3, 1, 2, 5, 2, 2, 7, 3,
- 7, 3, 6, 7, 5, 4, 4, 3, 2, 3, 2, 0, 5, 9, 4, 7, 8, 7, 5, 9, 7, 6, 5, 6, 2,
- 5, 1, 1, 3, 6, 8, 6, 8, 3, 7, 7, 2, 1, 6, 1, 6, 0, 2, 9, 7, 3, 9, 3, 7, 9,
- 8, 8, 2, 8, 1, 2, 5, 5, 6, 8, 4, 3, 4, 1, 8, 8, 6, 0, 8, 0, 8, 0, 1, 4, 8,
- 6, 9, 6, 8, 9, 9, 4, 1, 4, 0, 6, 2, 5, 2, 8, 4, 2, 1, 7, 0, 9, 4, 3, 0, 4,
- 0, 4, 0, 0, 7, 4, 3, 4, 8, 4, 4, 9, 7, 0, 7, 0, 3, 1, 2, 5, 1, 4, 2, 1, 0,
- 8, 5, 4, 7, 1, 5, 2, 0, 2, 0, 0, 3, 7, 1, 7, 4, 2, 2, 4, 8, 5, 3, 5, 1, 5,
- 6, 2, 5, 7, 1, 0, 5, 4, 2, 7, 3, 5, 7, 6, 0, 1, 0, 0, 1, 8, 5, 8, 7, 1, 1,
- 2, 4, 2, 6, 7, 5, 7, 8, 1, 2, 5, 3, 5, 5, 2, 7, 1, 3, 6, 7, 8, 8, 0, 0, 5,
- 0, 0, 9, 2, 9, 3, 5, 5, 6, 2, 1, 3, 3, 7, 8, 9, 0, 6, 2, 5, 1, 7, 7, 6, 3,
- 5, 6, 8, 3, 9, 4, 0, 0, 2, 5, 0, 4, 6, 4, 6, 7, 7, 8, 1, 0, 6, 6, 8, 9, 4,
- 5, 3, 1, 2, 5, 8, 8, 8, 1, 7, 8, 4, 1, 9, 7, 0, 0, 1, 2, 5, 2, 3, 2, 3, 3,
- 8, 9, 0, 5, 3, 3, 4, 4, 7, 2, 6, 5, 6, 2, 5, 4, 4, 4, 0, 8, 9, 2, 0, 9, 8,
- 5, 0, 0, 6, 2, 6, 1, 6, 1, 6, 9, 4, 5, 2, 6, 6, 7, 2, 3, 6, 3, 2, 8, 1, 2,
- 5, 2, 2, 2, 0, 4, 4, 6, 0, 4, 9, 2, 5, 0, 3, 1, 3, 0, 8, 0, 8, 4, 7, 2, 6,
- 3, 3, 3, 6, 1, 8, 1, 6, 4, 0, 6, 2, 5, 1, 1, 1, 0, 2, 2, 3, 0, 2, 4, 6, 2,
- 5, 1, 5, 6, 5, 4, 0, 4, 2, 3, 6, 3, 1, 6, 6, 8, 0, 9, 0, 8, 2, 0, 3, 1, 2,
- 5, 5, 5, 5, 1, 1, 1, 5, 1, 2, 3, 1, 2, 5, 7, 8, 2, 7, 0, 2, 1, 1, 8, 1, 5,
- 8, 3, 4, 0, 4, 5, 4, 1, 0, 1, 5, 6, 2, 5, 2, 7, 7, 5, 5, 5, 7, 5, 6, 1, 5,
- 6, 2, 8, 9, 1, 3, 5, 1, 0, 5, 9, 0, 7, 9, 1, 7, 0, 2, 2, 7, 0, 5, 0, 7, 8,
- 1, 2, 5, 1, 3, 8, 7, 7, 7, 8, 7, 8, 0, 7, 8, 1, 4, 4, 5, 6, 7, 5, 5, 2, 9,
- 5, 3, 9, 5, 8, 5, 1, 1, 3, 5, 2, 5, 3, 9, 0, 6, 2, 5, 6, 9, 3, 8, 8, 9, 3,
- 9, 0, 3, 9, 0, 7, 2, 2, 8, 3, 7, 7, 6, 4, 7, 6, 9, 7, 9, 2, 5, 5, 6, 7, 6,
- 2, 6, 9, 5, 3, 1, 2, 5, 3, 4, 6, 9, 4, 4, 6, 9, 5, 1, 9, 5, 3, 6, 1, 4, 1,
- 8, 8, 8, 2, 3, 8, 4, 8, 9, 6, 2, 7, 8, 3, 8, 1, 3, 4, 7, 6, 5, 6, 2, 5, 1,
- 7, 3, 4, 7, 2, 3, 4, 7, 5, 9, 7, 6, 8, 0, 7, 0, 9, 4, 4, 1, 1, 9, 2, 4, 4,
- 8, 1, 3, 9, 1, 9, 0, 6, 7, 3, 8, 2, 8, 1, 2, 5, 8, 6, 7, 3, 6, 1, 7, 3, 7,
- 9, 8, 8, 4, 0, 3, 5, 4, 7, 2, 0, 5, 9, 6, 2, 2, 4, 0, 6, 9, 5, 9, 5, 3, 3,
- 6, 9, 1, 4, 0, 6, 2, 5,
-};
-
-// wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits
-// returns the number of additional decimal digits when left-shifting by shift.
-//
-// See below for preconditions.
-static uint32_t //
-wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits(
- wuffs_base__private_implementation__high_prec_dec* h,
- uint32_t shift) {
- // Masking with 0x3F should be unnecessary (assuming the preconditions) but
- // it's cheap and ensures that we don't overflow the
- // wuffs_base__private_implementation__hpd_left_shift array.
- shift &= 63;
-
- uint32_t x_a = wuffs_base__private_implementation__hpd_left_shift[shift];
- uint32_t x_b = wuffs_base__private_implementation__hpd_left_shift[shift + 1];
- uint32_t num_new_digits = x_a >> 11;
- uint32_t pow5_a = 0x7FF & x_a;
- uint32_t pow5_b = 0x7FF & x_b;
-
- const uint8_t* pow5 =
- &wuffs_base__private_implementation__powers_of_5[pow5_a];
- uint32_t i = 0;
- uint32_t n = pow5_b - pow5_a;
- for (; i < n; i++) {
- if (i >= h->num_digits) {
- return num_new_digits - 1;
- } else if (h->digits[i] == pow5[i]) {
- continue;
- } else if (h->digits[i] < pow5[i]) {
- return num_new_digits - 1;
- } else {
- return num_new_digits;
- }
- }
- return num_new_digits;
-}
-
-// --------
-
-// wuffs_base__private_implementation__high_prec_dec__rounded_integer returns
-// the integral (non-fractional) part of h, provided that it is 18 or fewer
-// decimal digits. For 19 or more digits, it returns UINT64_MAX. Note that:
-// - (1 << 53) is 9007199254740992, which has 16 decimal digits.
-// - (1 << 56) is 72057594037927936, which has 17 decimal digits.
-// - (1 << 59) is 576460752303423488, which has 18 decimal digits.
-// - (1 << 63) is 9223372036854775808, which has 19 decimal digits.
-// and that IEEE 754 double precision has 52 mantissa bits.
-//
-// That integral part is rounded-to-even: rounding 7.5 or 8.5 both give 8.
-//
-// h's negative bit is ignored: rounding -8.6 returns 9.
-//
-// See below for preconditions.
-static uint64_t //
-wuffs_base__private_implementation__high_prec_dec__rounded_integer(
- wuffs_base__private_implementation__high_prec_dec* h) {
- if ((h->num_digits == 0) || (h->decimal_point < 0)) {
- return 0;
- } else if (h->decimal_point > 18) {
- return UINT64_MAX;
- }
-
- uint32_t dp = (uint32_t)(h->decimal_point);
- uint64_t n = 0;
- uint32_t i = 0;
- for (; i < dp; i++) {
- n = (10 * n) + ((i < h->num_digits) ? h->digits[i] : 0);
- }
-
- bool round_up = false;
- if (dp < h->num_digits) {
- round_up = h->digits[dp] >= 5;
- if ((h->digits[dp] == 5) && (dp + 1 == h->num_digits)) {
- // We are exactly halfway. If we're truncated, round up, otherwise round
- // to even.
- round_up = h->truncated || //
- ((dp > 0) && (1 & h->digits[dp - 1]));
- }
- }
- if (round_up) {
- n++;
- }
-
- return n;
-}
-
-// wuffs_base__private_implementation__high_prec_dec__small_xshift shifts h's
-// number (where 'x' is 'l' or 'r' for left or right) by a small shift value.
-//
-// Preconditions:
-// - h is non-NULL.
-// - h->decimal_point is "not extreme".
-// - shift is non-zero.
-// - shift is "a small shift".
-//
-// "Not extreme" means within
-// ±WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE.
-//
-// "A small shift" means not more than
-// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL.
-//
-// wuffs_base__private_implementation__high_prec_dec__rounded_integer and
-// wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits
-// have the same preconditions.
-
-static void //
-wuffs_base__private_implementation__high_prec_dec__small_lshift(
- wuffs_base__private_implementation__high_prec_dec* h,
- uint32_t shift) {
- if (h->num_digits == 0) {
- return;
- }
- uint32_t num_new_digits =
- wuffs_base__private_implementation__high_prec_dec__lshift_num_new_digits(
- h, shift);
- uint32_t rx = h->num_digits - 1; // Read index.
- uint32_t wx = h->num_digits - 1 + num_new_digits; // Write index.
- uint64_t n = 0;
-
- // Repeat: pick up a digit, put down a digit, right to left.
- while (((int32_t)rx) >= 0) {
- n += ((uint64_t)(h->digits[rx])) << shift;
- uint64_t quo = n / 10;
- uint64_t rem = n - (10 * quo);
- if (wx < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
- h->digits[wx] = (uint8_t)rem;
- } else if (rem > 0) {
- h->truncated = true;
- }
- n = quo;
- wx--;
- rx--;
- }
-
- // Put down leading digits, right to left.
- while (n > 0) {
- uint64_t quo = n / 10;
- uint64_t rem = n - (10 * quo);
- if (wx < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
- h->digits[wx] = (uint8_t)rem;
- } else if (rem > 0) {
- h->truncated = true;
- }
- n = quo;
- wx--;
- }
-
- // Finish.
- h->num_digits += num_new_digits;
- if (h->num_digits >
- WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
- h->num_digits = WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION;
- }
- h->decimal_point += (int32_t)num_new_digits;
- wuffs_base__private_implementation__high_prec_dec__trim(h);
-}
-
-static void //
-wuffs_base__private_implementation__high_prec_dec__small_rshift(
- wuffs_base__private_implementation__high_prec_dec* h,
- uint32_t shift) {
- uint32_t rx = 0; // Read index.
- uint32_t wx = 0; // Write index.
- uint64_t n = 0;
-
- // Pick up enough leading digits to cover the first shift.
- while ((n >> shift) == 0) {
- if (rx < h->num_digits) {
- // Read a digit.
- n = (10 * n) + h->digits[rx++];
- } else if (n == 0) {
- // h's number used to be zero and remains zero.
- return;
- } else {
- // Read sufficient implicit trailing zeroes.
- while ((n >> shift) == 0) {
- n = 10 * n;
- rx++;
- }
- break;
- }
- }
- h->decimal_point -= ((int32_t)(rx - 1));
- if (h->decimal_point <
- -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
- // After the shift, h's number is effectively zero.
- h->num_digits = 0;
- h->decimal_point = 0;
- h->negative = false;
- h->truncated = false;
- return;
- }
-
- // Repeat: pick up a digit, put down a digit, left to right.
- uint64_t mask = (((uint64_t)(1)) << shift) - 1;
- while (rx < h->num_digits) {
- uint8_t new_digit = ((uint8_t)(n >> shift));
- n = (10 * (n & mask)) + h->digits[rx++];
- h->digits[wx++] = new_digit;
- }
-
- // Put down trailing digits, left to right.
- while (n > 0) {
- uint8_t new_digit = ((uint8_t)(n >> shift));
- n = 10 * (n & mask);
- if (wx < WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION) {
- h->digits[wx++] = new_digit;
- } else if (new_digit > 0) {
- h->truncated = true;
- }
- }
-
- // Finish.
- h->num_digits = wx;
- wuffs_base__private_implementation__high_prec_dec__trim(h);
-}
-
-// --------
-
-// The wuffs_base__private_implementation__etc_powers_of_10 tables were printed
-// by script/print-mpb-powers-of-10.go. That script has an optional -comments
-// flag, whose output is not copied here, which prints further detail.
-//
-// These tables are used in
-// wuffs_base__private_implementation__medium_prec_bin__assign_from_hpd.
-
-// wuffs_base__private_implementation__big_powers_of_10 contains approximations
-// to the powers of 10, ranging from 1e-348 to 1e+340, with the exponent
-// stepping by 8: -348, -340, -332, ..., -12, -4, +4, +12, ..., +340. Each step
-// consists of three uint32_t elements. There are 87 triples, 87 * 3 = 261.
-//
-// For example, the third approximation, for 1e-332, consists of the uint32_t
-// triple (0x3055AC76, 0x8B16FB20, 0xFFFFFB72). The first two of that triple
-// are a little-endian uint64_t value: 0x8B16FB203055AC76. The last one is an
-// int32_t value: -1166. Together, they represent the approximation:
-// 1e-332 ≈ 0x8B16FB203055AC76 * (2 ** -1166)
-// Similarly, the (0x00000000, 0x9C400000, 0xFFFFFFCE) uint32_t triple means:
-// 1e+4 ≈ 0x9C40000000000000 * (2 ** -50) // This approx'n is exact.
-// Similarly, the (0xD4C4FB27, 0xED63A231, 0x000000A2) uint32_t triple means:
-// 1e+68 ≈ 0xED63A231D4C4FB27 * (2 ** 162)
-static const uint32_t
- wuffs_base__private_implementation__big_powers_of_10[261] = {
- 0x081C0288, 0xFA8FD5A0, 0xFFFFFB3C, 0xA23EBF76, 0xBAAEE17F, 0xFFFFFB57,
- 0x3055AC76, 0x8B16FB20, 0xFFFFFB72, 0x5DCE35EA, 0xCF42894A, 0xFFFFFB8C,
- 0x55653B2D, 0x9A6BB0AA, 0xFFFFFBA7, 0x3D1A45DF, 0xE61ACF03, 0xFFFFFBC1,
- 0xC79AC6CA, 0xAB70FE17, 0xFFFFFBDC, 0xBEBCDC4F, 0xFF77B1FC, 0xFFFFFBF6,
- 0x416BD60C, 0xBE5691EF, 0xFFFFFC11, 0x907FFC3C, 0x8DD01FAD, 0xFFFFFC2C,
- 0x31559A83, 0xD3515C28, 0xFFFFFC46, 0xADA6C9B5, 0x9D71AC8F, 0xFFFFFC61,
- 0x23EE8BCB, 0xEA9C2277, 0xFFFFFC7B, 0x4078536D, 0xAECC4991, 0xFFFFFC96,
- 0x5DB6CE57, 0x823C1279, 0xFFFFFCB1, 0x4DFB5637, 0xC2109436, 0xFFFFFCCB,
- 0x3848984F, 0x9096EA6F, 0xFFFFFCE6, 0x25823AC7, 0xD77485CB, 0xFFFFFD00,
- 0x97BF97F4, 0xA086CFCD, 0xFFFFFD1B, 0x172AACE5, 0xEF340A98, 0xFFFFFD35,
- 0x2A35B28E, 0xB23867FB, 0xFFFFFD50, 0xD2C63F3B, 0x84C8D4DF, 0xFFFFFD6B,
- 0x1AD3CDBA, 0xC5DD4427, 0xFFFFFD85, 0xBB25C996, 0x936B9FCE, 0xFFFFFDA0,
- 0x7D62A584, 0xDBAC6C24, 0xFFFFFDBA, 0x0D5FDAF6, 0xA3AB6658, 0xFFFFFDD5,
- 0xDEC3F126, 0xF3E2F893, 0xFFFFFDEF, 0xAAFF80B8, 0xB5B5ADA8, 0xFFFFFE0A,
- 0x6C7C4A8B, 0x87625F05, 0xFFFFFE25, 0x34C13053, 0xC9BCFF60, 0xFFFFFE3F,
- 0x91BA2655, 0x964E858C, 0xFFFFFE5A, 0x70297EBD, 0xDFF97724, 0xFFFFFE74,
- 0xB8E5B88F, 0xA6DFBD9F, 0xFFFFFE8F, 0x88747D94, 0xF8A95FCF, 0xFFFFFEA9,
- 0x8FA89BCF, 0xB9447093, 0xFFFFFEC4, 0xBF0F156B, 0x8A08F0F8, 0xFFFFFEDF,
- 0x653131B6, 0xCDB02555, 0xFFFFFEF9, 0xD07B7FAC, 0x993FE2C6, 0xFFFFFF14,
- 0x2A2B3B06, 0xE45C10C4, 0xFFFFFF2E, 0x697392D3, 0xAA242499, 0xFFFFFF49,
- 0x8300CA0E, 0xFD87B5F2, 0xFFFFFF63, 0x92111AEB, 0xBCE50864, 0xFFFFFF7E,
- 0x6F5088CC, 0x8CBCCC09, 0xFFFFFF99, 0xE219652C, 0xD1B71758, 0xFFFFFFB3,
- 0x00000000, 0x9C400000, 0xFFFFFFCE, 0x00000000, 0xE8D4A510, 0xFFFFFFE8,
- 0xAC620000, 0xAD78EBC5, 0x00000003, 0xF8940984, 0x813F3978, 0x0000001E,
- 0xC90715B3, 0xC097CE7B, 0x00000038, 0x7BEA5C70, 0x8F7E32CE, 0x00000053,
- 0xABE98068, 0xD5D238A4, 0x0000006D, 0x179A2245, 0x9F4F2726, 0x00000088,
- 0xD4C4FB27, 0xED63A231, 0x000000A2, 0x8CC8ADA8, 0xB0DE6538, 0x000000BD,
- 0x1AAB65DB, 0x83C7088E, 0x000000D8, 0x42711D9A, 0xC45D1DF9, 0x000000F2,
- 0xA61BE758, 0x924D692C, 0x0000010D, 0x1A708DEA, 0xDA01EE64, 0x00000127,
- 0x9AEF774A, 0xA26DA399, 0x00000142, 0xB47D6B85, 0xF209787B, 0x0000015C,
- 0x79DD1877, 0xB454E4A1, 0x00000177, 0x5B9BC5C2, 0x865B8692, 0x00000192,
- 0xC8965D3D, 0xC83553C5, 0x000001AC, 0xFA97A0B3, 0x952AB45C, 0x000001C7,
- 0x99A05FE3, 0xDE469FBD, 0x000001E1, 0xDB398C25, 0xA59BC234, 0x000001FC,
- 0xA3989F5C, 0xF6C69A72, 0x00000216, 0x54E9BECE, 0xB7DCBF53, 0x00000231,
- 0xF22241E2, 0x88FCF317, 0x0000024C, 0xD35C78A5, 0xCC20CE9B, 0x00000266,
- 0x7B2153DF, 0x98165AF3, 0x00000281, 0x971F303A, 0xE2A0B5DC, 0x0000029B,
- 0x5CE3B396, 0xA8D9D153, 0x000002B6, 0xA4A7443C, 0xFB9B7CD9, 0x000002D0,
- 0xA7A44410, 0xBB764C4C, 0x000002EB, 0xB6409C1A, 0x8BAB8EEF, 0x00000306,
- 0xA657842C, 0xD01FEF10, 0x00000320, 0xE9913129, 0x9B10A4E5, 0x0000033B,
- 0xA19C0C9D, 0xE7109BFB, 0x00000355, 0x623BF429, 0xAC2820D9, 0x00000370,
- 0x7AA7CF85, 0x80444B5E, 0x0000038B, 0x03ACDD2D, 0xBF21E440, 0x000003A5,
- 0x5E44FF8F, 0x8E679C2F, 0x000003C0, 0x9C8CB841, 0xD433179D, 0x000003DA,
- 0xB4E31BA9, 0x9E19DB92, 0x000003F5, 0xBADF77D9, 0xEB96BF6E, 0x0000040F,
- 0x9BF0EE6B, 0xAF87023B, 0x0000042A,
-};
-
-// wuffs_base__private_implementation__small_powers_of_10 contains
-// approximations to the powers of 10, ranging from 1e+0 to 1e+7, with the
-// exponent stepping by 1. Each step consists of three uint32_t elements.
-//
-// For example, the third approximation, for 1e+2, consists of the uint32_t
-// triple (0x00000000, 0xC8000000, 0xFFFFFFC7). The first two of that triple
-// are a little-endian uint64_t value: 0xC800000000000000. The last one is an
-// int32_t value: -57. Together, they represent the approximation:
-// 1e+2 ≈ 0xC800000000000000 * (2 ** -57) // This approx'n is exact.
-// Similarly, the (0x00000000, 0x9C400000, 0xFFFFFFCE) uint32_t triple means:
-// 1e+4 ≈ 0x9C40000000000000 * (2 ** -50) // This approx'n is exact.
-static const uint32_t
- wuffs_base__private_implementation__small_powers_of_10[24] = {
- 0x00000000, 0x80000000, 0xFFFFFFC1, 0x00000000, 0xA0000000, 0xFFFFFFC4,
- 0x00000000, 0xC8000000, 0xFFFFFFC7, 0x00000000, 0xFA000000, 0xFFFFFFCA,
- 0x00000000, 0x9C400000, 0xFFFFFFCE, 0x00000000, 0xC3500000, 0xFFFFFFD1,
- 0x00000000, 0xF4240000, 0xFFFFFFD4, 0x00000000, 0x98968000, 0xFFFFFFD8,
-};
-
-// wuffs_base__private_implementation__f64_powers_of_10 holds powers of 10 that
-// can be exactly represented by a float64 (what C calls a double).
-static const double wuffs_base__private_implementation__f64_powers_of_10[23] = {
- 1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11,
- 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22,
-};
-
-// --------
-
-// wuffs_base__private_implementation__medium_prec_bin (abbreviated as MPB) is
-// a fixed precision floating point binary number. Unlike IEEE 754 Floating
-// Point, it cannot represent infinity or NaN (Not a Number).
-//
-// "Medium precision" means that the mantissa holds 64 binary digits, a little
-// more than "double precision", and sizeof(MPB) > sizeof(double). 64 is
-// obviously the number of bits in a uint64_t.
-//
-// An MPB isn't for general purpose arithmetic, only for conversions to and
-// from IEEE 754 double-precision floating point.
-//
-// There is no implicit mantissa bit. The mantissa field is zero if and only if
-// the overall floating point value is ±0. An MPB is normalized if the mantissa
-// is zero or its high bit (the 1<<63 bit) is set.
-//
-// There is no negative bit. An MPB can only represent non-negative numbers.
-//
-// The "all fields are zero" value is valid, and represents the number +0.
-//
-// This is the "Do It Yourself Floating Point" data structure from Loitsch,
-// "Printing Floating-Point Numbers Quickly and Accurately with Integers"
-// (https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf).
-//
-// Florian Loitsch is also the primary contributor to
-// https://github.com/google/double-conversion
-typedef struct {
- uint64_t mantissa;
- int32_t exp2;
-} wuffs_base__private_implementation__medium_prec_bin;
-
-static uint32_t //
-wuffs_base__private_implementation__medium_prec_bin__normalize(
- wuffs_base__private_implementation__medium_prec_bin* m) {
- if (m->mantissa == 0) {
- return 0;
- }
- uint32_t shift = wuffs_base__count_leading_zeroes_u64(m->mantissa);
- m->mantissa <<= shift;
- m->exp2 -= (int32_t)shift;
- return shift;
-}
-
-// wuffs_base__private_implementation__medium_prec_bin__mul_pow_10 sets m to be
-// (m * pow), where pow comes from an etc_powers_of_10 triple starting at p.
-//
-// The result is rounded, but not necessarily normalized.
-//
-// Preconditions:
-// - m is non-NULL.
-// - m->mantissa is non-zero.
-// - m->mantissa's high bit is set (i.e. m is normalized).
-//
-// The etc_powers_of_10 triple is already normalized.
-static void //
-wuffs_base__private_implementation__medium_prec_bin__mul_pow_10(
- wuffs_base__private_implementation__medium_prec_bin* m,
- const uint32_t* p) {
- uint64_t p_mantissa = ((uint64_t)p[0]) | (((uint64_t)p[1]) << 32);
- int32_t p_exp2 = (int32_t)p[2];
-
- wuffs_base__multiply_u64__output o =
- wuffs_base__multiply_u64(m->mantissa, p_mantissa);
- // Round the mantissa up. It cannot overflow because the maximum possible
- // value of o.hi is 0xFFFFFFFFFFFFFFFE.
- m->mantissa = o.hi + (o.lo >> 63);
- m->exp2 = m->exp2 + p_exp2 + 64;
-}
-
-// wuffs_base__private_implementation__medium_prec_bin__as_f64 converts m to a
-// double (what C calls a double-precision float64).
-//
-// Preconditions:
-// - m is non-NULL.
-// - m->mantissa is non-zero.
-// - m->mantissa's high bit is set (i.e. m is normalized).
-static double //
-wuffs_base__private_implementation__medium_prec_bin__as_f64(
- const wuffs_base__private_implementation__medium_prec_bin* m,
- bool negative) {
- uint64_t mantissa64 = m->mantissa;
- // An mpb's mantissa has the implicit (binary) decimal point at the right
- // hand end of the mantissa's explicit digits. A double-precision's mantissa
- // has that decimal point near the left hand end. There's also an explicit
- // versus implicit leading 1 bit (binary digit). Together, the difference in
- // semantics corresponds to adding 63.
- int32_t exp2 = m->exp2 + 63;
-
- // Ensure that exp2 is at least -1022, the minimum double-precision exponent
- // for normal (as opposed to subnormal) numbers.
- if (-1022 > exp2) {
- uint32_t n = (uint32_t)(-1022 - exp2);
- mantissa64 >>= n;
- exp2 += (int32_t)n;
- }
-
- // Extract the (1 + 52) bits from the 64-bit mantissa64. 52 is the number of
- // explicit mantissa bits in a double-precision f64.
- //
- // Before, we have 64 bits and due to normalization, the high bit 'H' is 1.
- // 63 55 47 etc 15 7
- // H210_9876_5432_1098_7654_etc_etc_etc_5432_1098_7654_3210
- // ++++_++++_++++_++++_++++_etc_etc_etc_++++_+..._...._.... Kept bits.
- // ...._...._...H_2109_8765_etc_etc_etc_6543_2109_8765_4321 After shifting.
- // After, we have 53 bits (and bit #52 is this 'H' bit).
- uint64_t mantissa53 = mantissa64 >> 11;
-
- // Round up if the old bit #10 (the highest bit dropped by shifting) was set.
- // We also fix any overflow from rounding up.
- if (mantissa64 & 1024) {
- mantissa53++;
- if ((mantissa53 >> 53) != 0) {
- mantissa53 >>= 1;
- exp2++;
- }
- }
-
- // Handle double-precision infinity (a nominal exponent of 1024) and
- // subnormals (an exponent of -1023 and no implicit mantissa bit, bit #52).
- if (exp2 >= 1024) {
- mantissa53 = 0;
- exp2 = 1024;
- } else if ((mantissa53 >> 52) == 0) {
- exp2 = -1023;
- }
-
- // Pack the bits and return.
- const int32_t f64_bias = -1023;
- uint64_t exp2_bits =
- (uint64_t)((exp2 - f64_bias) & 0x07FF); // (1 << 11) - 1.
- uint64_t bits = (mantissa53 & 0x000FFFFFFFFFFFFF) | // (1 << 52) - 1.
- (exp2_bits << 52) | //
- (negative ? 0x8000000000000000 : 0); // (1 << 63).
- return wuffs_base__ieee_754_bit_representation__to_f64(bits);
-}
-
-// wuffs_base__private_implementation__medium_prec_bin__parse_number_f64
-// converts from an HPD to a double, using an MPB as scratch space. It returns
-// a NULL status.repr if there is no ambiguity in the truncation or rounding to
-// a float64 (an IEEE 754 double-precision floating point value).
-//
-// It may modify m even if it returns a non-NULL status.repr.
-static wuffs_base__result_f64 //
-wuffs_base__private_implementation__medium_prec_bin__parse_number_f64(
- wuffs_base__private_implementation__medium_prec_bin* m,
- const wuffs_base__private_implementation__high_prec_dec* h,
- bool skip_fast_path_for_tests) {
- do {
- // m->mantissa is a uint64_t, which is an integer approximation to a
- // rational value - h's underlying digits after m's normalization. This
- // error is an upper bound on the difference between the approximate and
- // actual value.
- //
- // The DiyFpStrtod function in https://github.com/google/double-conversion
- // uses a finer grain (1/8th of the ULP, Unit in the Last Place) when
- // tracking error. This implementation is coarser (1 ULP) but simpler.
- //
- // It is an error in the "numerical approximation" sense, not in the
- // typical programming sense (as in "bad input" or "a result type").
- uint64_t error = 0;
-
- // Convert up to 19 decimal digits (in h->digits) to 64 binary digits (in
- // m->mantissa): (1e19 < (1<<64)) and ((1<<64) < 1e20). If we have more
- // than 19 digits, we're truncating (with error).
- uint32_t i;
- uint32_t i_end = h->num_digits;
- if (i_end > 19) {
- i_end = 19;
- error = 1;
- }
- uint64_t mantissa = 0;
- for (i = 0; i < i_end; i++) {
- mantissa = (10 * mantissa) + h->digits[i];
- }
- m->mantissa = mantissa;
- m->exp2 = 0;
-
- // Check that exp10 lies in the (big_powers_of_10 + small_powers_of_10)
- // range, -348 ..= +347, stepping big_powers_of_10 by 8 (which is 87
- // triples) and small_powers_of_10 by 1 (which is 8 triples).
- int32_t exp10 = h->decimal_point - ((int32_t)(i_end));
- if (exp10 < -348) {
- goto fail;
- }
- uint32_t bpo10 = ((uint32_t)(exp10 + 348)) / 8;
- uint32_t spo10 = ((uint32_t)(exp10 + 348)) % 8;
- if (bpo10 >= 87) {
- goto fail;
- }
-
- // Try a fast path, if float64 math would be exact.
- //
- // 15 is such that 1e15 can be losslessly represented in a float64
- // mantissa: (1e15 < (1<<53)) and ((1<<53) < 1e16).
- //
- // 22 is the maximum valid index for the
- // wuffs_base__private_implementation__f64_powers_of_10 array.
- do {
- if (skip_fast_path_for_tests || ((mantissa >> 52) != 0)) {
- break;
- }
- double d = (double)mantissa;
-
- if (exp10 == 0) {
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = h->negative ? -d : +d;
- return ret;
-
- } else if (exp10 > 0) {
- if (exp10 > 22) {
- if (exp10 > (15 + 22)) {
- break;
- }
- // If exp10 is in the range 23 ..= 37, try moving a few of the zeroes
- // from the exponent to the mantissa. If we're still under 1e15, we
- // haven't truncated any mantissa bits.
- if (exp10 > 22) {
- d *= wuffs_base__private_implementation__f64_powers_of_10[exp10 -
- 22];
- exp10 = 22;
- if (d >= 1e15) {
- break;
- }
- }
- }
- d *= wuffs_base__private_implementation__f64_powers_of_10[exp10];
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = h->negative ? -d : +d;
- return ret;
-
- } else { // "if (exp10 < 0)" is effectively "if (true)" here.
- if (exp10 < -22) {
- break;
- }
- d /= wuffs_base__private_implementation__f64_powers_of_10[-exp10];
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = h->negative ? -d : +d;
- return ret;
- }
- } while (0);
-
- // Normalize (and scale the error).
- error <<= wuffs_base__private_implementation__medium_prec_bin__normalize(m);
-
- // Multiplying two MPB values nominally multiplies two mantissas, call them
- // A and B, which are integer approximations to the precise values (A+a)
- // and (B+b) for some error terms a and b.
- //
- // MPB multiplication calculates (((A+a) * (B+b)) >> 64) to be ((A*B) >>
- // 64). Shifting (truncating) and rounding introduces further error. The
- // difference between the calculated result:
- // ((A*B ) >> 64)
- // and the true result:
- // ((A*B + A*b + a*B + a*b) >> 64) + rounding_error
- // is:
- // (( A*b + a*B + a*b) >> 64) + rounding_error
- // which can be re-grouped as:
- // ((A*b) >> 64) + ((a*(B+b)) >> 64) + rounding_error
- //
- // Now, let A and a be "m->mantissa" and "error", and B and b be the
- // pre-calculated power of 10. A and B are both less than (1 << 64), a is
- // the "error" local variable and b is less than 1.
- //
- // An upper bound (in absolute value) on ((A*b) >> 64) is therefore 1.
- //
- // An upper bound on ((a*(B+b)) >> 64) is a, also known as error.
- //
- // Finally, the rounding_error is at most 1.
- //
- // In total, calling mpb__mul_pow_10 will raise the worst-case error by 2.
- // The subsequent re-normalization can multiply that by a further factor.
-
- // Multiply by small_powers_of_10[etc].
- wuffs_base__private_implementation__medium_prec_bin__mul_pow_10(
- m, &wuffs_base__private_implementation__small_powers_of_10[3 * spo10]);
- error += 2;
- error <<= wuffs_base__private_implementation__medium_prec_bin__normalize(m);
-
- // Multiply by big_powers_of_10[etc].
- wuffs_base__private_implementation__medium_prec_bin__mul_pow_10(
- m, &wuffs_base__private_implementation__big_powers_of_10[3 * bpo10]);
- error += 2;
- error <<= wuffs_base__private_implementation__medium_prec_bin__normalize(m);
-
- // We have a good approximation of h, but we still have to check whether
- // the error is small enough. Equivalently, whether the number of surplus
- // mantissa bits (the bits dropped when going from m's 64 mantissa bits to
- // the smaller number of double-precision mantissa bits) would always round
- // up or down, even when perturbed by ±error. We start at 11 surplus bits
- // (m has 64, double-precision has 1+52), but it can be higher for
- // subnormals.
- //
- // In many cases, the error is small enough and we return true.
- const int32_t f64_bias = -1023;
- int32_t subnormal_exp2 = f64_bias - 63;
- uint32_t surplus_bits = 11;
- if (subnormal_exp2 >= m->exp2) {
- surplus_bits += 1 + ((uint32_t)(subnormal_exp2 - m->exp2));
- }
-
- uint64_t surplus_mask =
- (((uint64_t)1) << surplus_bits) - 1; // e.g. 0x07FF.
- uint64_t surplus = m->mantissa & surplus_mask;
- uint64_t halfway = ((uint64_t)1) << (surplus_bits - 1); // e.g. 0x0400.
-
- // Do the final calculation in *signed* arithmetic.
- int64_t i_surplus = (int64_t)surplus;
- int64_t i_halfway = (int64_t)halfway;
- int64_t i_error = (int64_t)error;
-
- if ((i_surplus > (i_halfway - i_error)) &&
- (i_surplus < (i_halfway + i_error))) {
- goto fail;
- }
-
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = wuffs_base__private_implementation__medium_prec_bin__as_f64(
- m, h->negative);
- return ret;
- } while (0);
-
-fail:
- do {
- wuffs_base__result_f64 ret;
- ret.status.repr = "#base: mpb__parse_number_f64 failed";
- ret.value = 0;
- return ret;
- } while (0);
-}
-
-// --------
-
-wuffs_base__result_f64 //
-wuffs_base__parse_number_f64_special(wuffs_base__slice_u8 s,
- const char* fallback_status_repr) {
- do {
- uint8_t* p = s.ptr;
- uint8_t* q = s.ptr + s.len;
-
- for (; (p < q) && (*p == '_'); p++) {
- }
- if (p >= q) {
- goto fallback;
- }
-
- // Parse sign.
- bool negative = false;
- do {
- if (*p == '+') {
- p++;
- } else if (*p == '-') {
- negative = true;
- p++;
- } else {
- break;
- }
- for (; (p < q) && (*p == '_'); p++) {
- }
- } while (0);
- if (p >= q) {
- goto fallback;
- }
-
- bool nan = false;
- switch (p[0]) {
- case 'I':
- case 'i':
- if (((q - p) < 3) || //
- ((p[1] != 'N') && (p[1] != 'n')) || //
- ((p[2] != 'F') && (p[2] != 'f'))) {
- goto fallback;
- }
- p += 3;
-
- if ((p >= q) || (*p == '_')) {
- break;
- } else if (((q - p) < 5) || //
- ((p[0] != 'I') && (p[0] != 'i')) || //
- ((p[1] != 'N') && (p[1] != 'n')) || //
- ((p[2] != 'I') && (p[2] != 'i')) || //
- ((p[3] != 'T') && (p[3] != 't')) || //
- ((p[4] != 'Y') && (p[4] != 'y'))) {
- goto fallback;
- }
- p += 5;
-
- if ((p >= q) || (*p == '_')) {
- break;
- }
- goto fallback;
-
- case 'N':
- case 'n':
- if (((q - p) < 3) || //
- ((p[1] != 'A') && (p[1] != 'a')) || //
- ((p[2] != 'N') && (p[2] != 'n'))) {
- goto fallback;
- }
- p += 3;
-
- if ((p >= q) || (*p == '_')) {
- nan = true;
- break;
- }
- goto fallback;
-
- default:
- goto fallback;
- }
-
- // Finish.
- for (; (p < q) && (*p == '_'); p++) {
- }
- if (p != q) {
- goto fallback;
- }
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = wuffs_base__ieee_754_bit_representation__to_f64(
- (nan ? 0x7FFFFFFFFFFFFFFF : 0x7FF0000000000000) |
- (negative ? 0x8000000000000000 : 0));
- return ret;
- } while (0);
-
-fallback:
- do {
- wuffs_base__result_f64 ret;
- ret.status.repr = fallback_status_repr;
- ret.value = 0;
- return ret;
- } while (0);
-}
-
-wuffs_base__result_f64 //
-wuffs_base__parse_number_f64(wuffs_base__slice_u8 s) {
- wuffs_base__private_implementation__medium_prec_bin m;
- wuffs_base__private_implementation__high_prec_dec h;
-
- do {
- // powers converts decimal powers of 10 to binary powers of 2. For example,
- // (10000 >> 13) is 1. It stops before the elements exceed 60, also known
- // as WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL.
- static const uint32_t num_powers = 19;
- static const uint8_t powers[19] = {
- 0, 3, 6, 9, 13, 16, 19, 23, 26, 29, //
- 33, 36, 39, 43, 46, 49, 53, 56, 59, //
- };
-
- wuffs_base__status status =
- wuffs_base__private_implementation__high_prec_dec__parse(&h, s);
- if (status.repr) {
- return wuffs_base__parse_number_f64_special(s, status.repr);
- }
-
- // Handle zero and obvious extremes. The largest and smallest positive
- // finite f64 values are approximately 1.8e+308 and 4.9e-324.
- if ((h.num_digits == 0) || (h.decimal_point < -326)) {
- goto zero;
- } else if (h.decimal_point > 310) {
- goto infinity;
- }
-
- wuffs_base__result_f64 mpb_result =
- wuffs_base__private_implementation__medium_prec_bin__parse_number_f64(
- &m, &h, false);
- if (mpb_result.status.repr == NULL) {
- return mpb_result;
- }
-
- // Scale by powers of 2 until we're in the range [½ .. 1], which gives us
- // our exponent (in base-2). First we shift right, possibly a little too
- // far, ending with a value certainly below 1 and possibly below ½...
- const int32_t f64_bias = -1023;
- int32_t exp2 = 0;
- while (h.decimal_point > 0) {
- uint32_t n = (uint32_t)(+h.decimal_point);
- uint32_t shift =
- (n < num_powers)
- ? powers[n]
- : WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;
-
- wuffs_base__private_implementation__high_prec_dec__small_rshift(&h,
- shift);
- if (h.decimal_point <
- -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
- goto zero;
- }
- exp2 += (int32_t)shift;
- }
- // ...then we shift left, putting us in [½ .. 1].
- while (h.decimal_point <= 0) {
- uint32_t shift;
- if (h.decimal_point == 0) {
- if (h.digits[0] >= 5) {
- break;
- }
- shift = (h.digits[0] <= 2) ? 2 : 1;
- } else {
- uint32_t n = (uint32_t)(-h.decimal_point);
- shift = (n < num_powers)
- ? powers[n]
- : WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;
- }
-
- wuffs_base__private_implementation__high_prec_dec__small_lshift(&h,
- shift);
- if (h.decimal_point >
- +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {
- goto infinity;
- }
- exp2 -= (int32_t)shift;
- }
-
- // We're in the range [½ .. 1] but f64 uses [1 .. 2].
- exp2--;
-
- // The minimum normal exponent is (f64_bias + 1).
- while ((f64_bias + 1) > exp2) {
- uint32_t n = (uint32_t)((f64_bias + 1) - exp2);
- if (n > WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL) {
- n = WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;
- }
- wuffs_base__private_implementation__high_prec_dec__small_rshift(&h, n);
- exp2 += (int32_t)n;
- }
-
- // Check for overflow.
- if ((exp2 - f64_bias) >= 0x07FF) { // (1 << 11) - 1.
- goto infinity;
- }
-
- // Extract 53 bits for the mantissa (in base-2).
- wuffs_base__private_implementation__high_prec_dec__small_lshift(&h, 53);
- uint64_t man2 =
- wuffs_base__private_implementation__high_prec_dec__rounded_integer(&h);
-
- // Rounding might have added one bit. If so, shift and re-check overflow.
- if ((man2 >> 53) != 0) {
- man2 >>= 1;
- exp2++;
- if ((exp2 - f64_bias) >= 0x07FF) { // (1 << 11) - 1.
- goto infinity;
- }
- }
-
- // Handle subnormal numbers.
- if ((man2 >> 52) == 0) {
- exp2 = f64_bias;
- }
-
- // Pack the bits and return.
- uint64_t exp2_bits =
- (uint64_t)((exp2 - f64_bias) & 0x07FF); // (1 << 11) - 1.
- uint64_t bits = (man2 & 0x000FFFFFFFFFFFFF) | // (1 << 52) - 1.
- (exp2_bits << 52) | //
- (h.negative ? 0x8000000000000000 : 0); // (1 << 63).
-
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);
- return ret;
- } while (0);
-
-zero:
- do {
- uint64_t bits = h.negative ? 0x8000000000000000 : 0;
-
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);
- return ret;
- } while (0);
-
-infinity:
- do {
- uint64_t bits = h.negative ? 0xFFF0000000000000 : 0x7FF0000000000000;
-
- wuffs_base__result_f64 ret;
- ret.status.repr = NULL;
- ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);
- return ret;
- } while (0);
-}
-
// ---------------- Hexadecimal
size_t //
diff --git a/internal/cgen/cgen.go b/internal/cgen/cgen.go
index 0a04649..7f6491d 100644
--- a/internal/cgen/cgen.go
+++ b/internal/cgen/cgen.go
@@ -116,13 +116,15 @@
}
buf := make(buffer, 0, 128*1024)
if err := expandBangBangInsert(&buf, baseAllImplC, map[string]func(*buffer) error{
- "// !! INSERT InterfaceDeclarations.\n": insertInterfaceDeclarations,
- "// !! INSERT InterfaceDefinitions.\n": insertInterfaceDefinitions,
- "// !! INSERT base/all-private.h.\n": insertBaseAllPrivateH,
- "// !! INSERT base/all-public.h.\n": insertBaseAllPublicH,
- "// !! INSERT base/copyright\n": insertBaseCopyright,
- "// !! INSERT base/image-impl.c.\n": insertBaseImageImplC,
- "// !! INSERT base/strconv-impl.c.\n": insertBaseStrConvImplC,
+ "// !! INSERT InterfaceDeclarations.\n": insertInterfaceDeclarations,
+ "// !! INSERT InterfaceDefinitions.\n": insertInterfaceDefinitions,
+ "// !! INSERT base/all-private.h.\n": insertBaseAllPrivateH,
+ "// !! INSERT base/all-public.h.\n": insertBaseAllPublicH,
+ "// !! INSERT base/copyright\n": insertBaseCopyright,
+ "// !! INSERT base/f64conv-submodule.c.\n": insertBaseF64ConvSubmoduleC,
+ "// !! INSERT base/image-impl.c.\n": insertBaseImageImplC,
+ "// !! INSERT base/pixconv-submodule.c.\n": insertBasePixConvSubmoduleC,
+ "// !! INSERT base/strconv-impl.c.\n": insertBaseStrConvImplC,
"// !! INSERT wuffs_base__status strings.\n": func(b *buffer) error {
for _, z := range builtin.Statuses {
msg, _ := t.Unescape(z)
@@ -327,12 +329,24 @@
return nil
}
+func insertBaseF64ConvSubmoduleC(buf *buffer) error {
+ buf.writes(baseF64ConvSubmoduleC)
+ buf.writeb('\n')
+ return nil
+}
+
func insertBaseImageImplC(buf *buffer) error {
buf.writes(baseImageImplC)
buf.writeb('\n')
return nil
}
+func insertBasePixConvSubmoduleC(buf *buffer) error {
+ buf.writes(basePixConvSubmoduleC)
+ buf.writeb('\n')
+ return nil
+}
+
func insertBaseStrConvImplC(buf *buffer) error {
buf.writes(baseStrConvImplC)
buf.writeb('\n')
diff --git a/internal/cgen/data.go b/internal/cgen/data.go
index 4f5bce9..9d08a41 100644
--- a/internal/cgen/data.go
+++ b/internal/cgen/data.go
@@ -23,20 +23,14 @@
"" +
"// ----------------\n\n#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)\n\nconst uint8_t wuffs_base__low_bits_mask__u8[9] = {\n 0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF,\n};\n\nconst uint16_t wuffs_base__low_bits_mask__u16[17] = {\n 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF,\n 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF,\n};\n\nconst uint32_t wuffs_base__low_bits_mask__u32[33] = {\n 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000F, 0x0000001F,\n 0x0000003F, 0x0000007F, 0x000000FF, 0x000001FF, 0x000003FF, 0x000007FF,\n 0x00000FFF, 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, 0x0001FFFF,\n 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, 0x001FFFFF, 0x003FFFFF, 0x007FFFFF,\n 0x00FFFFFF, 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, 0x1FFFFFFF,\n 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF,\n};\n\nconst uint64_t wuffs_base__low_bits_mask__u64[65] = {\n 0x0000000000000000, 0x0000000000000001, 0x0000000000000003,\n 0x0000000000" +
"000007, 0x000000000000000F, 0x000000000000001F,\n 0x000000000000003F, 0x000000000000007F, 0x00000000000000FF,\n 0x00000000000001FF, 0x00000000000003FF, 0x00000000000007FF,\n 0x0000000000000FFF, 0x0000000000001FFF, 0x0000000000003FFF,\n 0x0000000000007FFF, 0x000000000000FFFF, 0x000000000001FFFF,\n 0x000000000003FFFF, 0x000000000007FFFF, 0x00000000000FFFFF,\n 0x00000000001FFFFF, 0x00000000003FFFFF, 0x00000000007FFFFF,\n 0x0000000000FFFFFF, 0x0000000001FFFFFF, 0x0000000003FFFFFF,\n 0x0000000007FFFFFF, 0x000000000FFFFFFF, 0x000000001FFFFFFF,\n 0x000000003FFFFFFF, 0x000000007FFFFFFF, 0x00000000FFFFFFFF,\n 0x00000001FFFFFFFF, 0x00000003FFFFFFFF, 0x00000007FFFFFFFF,\n 0x0000000FFFFFFFFF, 0x0000001FFFFFFFFF, 0x0000003FFFFFFFFF,\n 0x0000007FFFFFFFFF, 0x000000FFFFFFFFFF, 0x000001FFFFFFFFFF,\n 0x000003FFFFFFFFFF, 0x000007FFFFFFFFFF, 0x00000FFFFFFFFFFF,\n 0x00001FFFFFFFFFFF, 0x00003FFFFFFFFFFF, 0x00007FFFFFFFFFFF,\n 0x0000FFFFFFFFFFFF, 0x0001FFFFFFFFFFFF, 0x0003FFFFFFFFFFFF,\n 0x0007FFFFFF" +
- "FFFFFF, 0x000FFFFFFFFFFFFF, 0x001FFFFFFFFFFFFF,\n 0x003FFFFFFFFFFFFF, 0x007FFFFFFFFFFFFF, 0x00FFFFFFFFFFFFFF,\n 0x01FFFFFFFFFFFFFF, 0x03FFFFFFFFFFFFFF, 0x07FFFFFFFFFFFFFF,\n 0x0FFFFFFFFFFFFFFF, 0x1FFFFFFFFFFFFFFF, 0x3FFFFFFFFFFFFFFF,\n 0x7FFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF,\n};\n\n// !! INSERT wuffs_base__status strings.\n\n// !! INSERT InterfaceDefinitions.\n\n// !! INSERT base/image-impl.c.\n\n// !! INSERT base/strconv-impl.c.\n\n#endif // !defined(WUFFS_CONFIG__MODULES) ||\n // defined(WUFFS_CONFIG__MODULE__BASE)\n\n#ifdef __cplusplus\n} // extern \"C\"\n#endif\n\n#endif // WUFFS_IMPLEMENTATION\n\n// !! WUFFS MONOLITHIC RELEASE DISCARDS EVERYTHING BELOW.\n\n#endif // WUFFS_INCLUDE_GUARD__BASE\n" +
+ "FFFFFF, 0x000FFFFFFFFFFFFF, 0x001FFFFFFFFFFFFF,\n 0x003FFFFFFFFFFFFF, 0x007FFFFFFFFFFFFF, 0x00FFFFFFFFFFFFFF,\n 0x01FFFFFFFFFFFFFF, 0x03FFFFFFFFFFFFFF, 0x07FFFFFFFFFFFFFF,\n 0x0FFFFFFFFFFFFFFF, 0x1FFFFFFFFFFFFFFF, 0x3FFFFFFFFFFFFFFF,\n 0x7FFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF,\n};\n\n// !! INSERT wuffs_base__status strings.\n\n// !! INSERT InterfaceDefinitions.\n\n// !! INSERT base/image-impl.c.\n\n// !! INSERT base/strconv-impl.c.\n\n#endif // !defined(WUFFS_CONFIG__MODULES) ||\n // defined(WUFFS_CONFIG__MODULE__BASE)\n\n#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)\n\n// !! INSERT base/f64conv-submodule.c.\n\n#endif // !defined(WUFFS_CONFIG__MODULES) ||\n // defined(WUFFS_CONFIG__MODULE__BASE)\n\n#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)\n\n// !! INSERT base/pixconv-submodule.c.\n\n#endif // !defined(WUFFS_CONFIG__MODULES) ||\n // defined(WUFFS_CONFIG__MODULE__BASE)\n\n#ifdef __cplusplus\n} // extern \"C\"\n#endif\n\n#endif // WUFFS_IMPLEMENTATION\n" +
+ "\n// !! WUFFS MONOLITHIC RELEASE DISCARDS EVERYTHING BELOW.\n\n#endif // WUFFS_INCLUDE_GUARD__BASE\n" +
""
const baseImageImplC = "" +
"// ---------------- Images\n\nconst uint32_t wuffs_base__pixel_format__bits_per_channel[16] = {\n 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,\n 0x08, 0x0A, 0x0C, 0x10, 0x18, 0x20, 0x30, 0x40,\n};\n\n" +
"" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__squash_bgr_565_888(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n\n size_t n = len4;\n while (n--) {\n uint32_t argb = wuffs_base__load_u32le__no_bounds_check(s);\n uint32_t b5 = 0x1F & (argb >> (8 - 5));\n uint32_t g6 = 0x3F & (argb >> (16 - 6));\n uint32_t r5 = 0x1F & (argb >> (24 - 5));\n uint32_t alpha = argb & 0xFF000000;\n wuffs_base__store_u32le__no_bounds_check(\n d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));\n s += 4;\n d += 4;\n }\n return len4 * 4;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n\n size_t n = len4;\n while (n--) {\n " +
- " uint8_t b0 = s[0];\n uint8_t b1 = s[1];\n uint8_t b2 = s[2];\n uint8_t b3 = s[3];\n d[0] = b2;\n d[1] = b1;\n d[2] = b0;\n d[3] = b3;\n s += 4;\n d += 4;\n }\n return len4 * 4;\n}\n\nstatic inline uint32_t //\nwuffs_base__swap_u32_argb_abgr(uint32_t u) {\n uint32_t o = u & 0xFF00FF00;\n uint32_t r = u & 0x00FF0000;\n uint32_t b = u & 0x000000FF;\n return o | (r >> 16) | (b << 16);\n}\n\n" +
- "" +
- "// --------\n\nstatic inline uint32_t //\nwuffs_base__composite_nonpremul_nonpremul_u32_axxx(uint32_t dst_nonpremul,\n uint32_t src_nonpremul) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));\n\n // Convert dst from nonpremul to premul.\n dr = (dr * da) / 0xFFFF;\n dg = (dg * da) / 0xFFFF;\n db = (db * da) / 0xFFFF;\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = ((sr * sa) + (dr * i" +
- "a)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert dst from premul to nonpremul.\n if (da != 0) {\n dr = (dr * 0xFFFF) / da;\n dg = (dg * 0xFFFF) / da;\n db = (db * 0xFFFF) / da;\n }\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\nstatic inline uint32_t //\nwuffs_base__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,\n uint32_t src_premul) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8))" +
- ";\n uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));\n\n // Convert dst from nonpremul to premul.\n dr = (dr * da) / 0xFFFF;\n dg = (dg * da) / 0xFFFF;\n db = (db * da) / 0xFFFF;\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (premul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = sr + ((dr * ia) / 0xFFFF);\n dg = sg + ((dg * ia) / 0xFFFF);\n db = sb + ((db * ia) / 0xFFFF);\n\n // Convert dst from premul to nonpremul.\n if (da != 0) {\n dr = (dr * 0xFFFF) / da;\n dg = (dg * 0xFFFF) / da;\n db = (db * 0xFFFF) / da;\n }\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\nstatic inline uint32_t //\nwuffs_base__composite_premul_nonpremul_u32_axxx(uint32_t dst_premul,\n uint32_t src_nonpremul) {\n // Convert from 8-bit color to 16-bit color.\n " +
- " uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\nstatic inline uint32_t //\nwuffs_base__composite_premul_premul_u32_axxx(uint32_t dst_premul,\n " +
- " uint32_t src_premul) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (premul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = sr + ((dr * ia) / 0xFFFF);\n dg = sg + ((dg * ia) / 0xFFFF);\n db = sb + ((db * ia) / 0xFFFF);\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\n" +
+ "// --------\n\nstatic inline uint32_t //\nwuffs_base__swap_u32_argb_abgr(uint32_t u) {\n uint32_t o = u & 0xFF00FF00;\n uint32_t r = u & 0x00FF0000;\n uint32_t b = u & 0x000000FF;\n return o | (r >> 16) | (b << 16);\n}\n\n" +
"" +
"// --------\n\nwuffs_base__color_u32_argb_premul //\nwuffs_base__pixel_buffer__color_u32_at(const wuffs_base__pixel_buffer* pb,\n uint32_t x,\n uint32_t y) {\n if (!pb || (x >= pb->pixcfg.private_impl.width) ||\n (y >= pb->pixcfg.private_impl.height)) {\n return 0;\n }\n\n if (wuffs_base__pixel_format__is_planar(&pb->pixcfg.private_impl.pixfmt)) {\n // TODO: support planar formats.\n return 0;\n }\n\n size_t stride = pb->private_impl.planes[0].stride;\n uint8_t* row = pb->private_impl.planes[0].ptr + (stride * ((size_t)y));\n\n switch (pb->pixcfg.private_impl.pixfmt.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n return wuffs_base__load_u32le__no_bounds_check(row + (4 * ((size_t)x)));\n\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: {\n uint8_t* palette = pb->private_impl.planes[3].ptr;\n return wu" +
"ffs_base__load_u32le__no_bounds_check(palette +\n (4 * ((size_t)row[x])));\n }\n\n // Common formats above. Rarer formats below.\n\n case WUFFS_BASE__PIXEL_FORMAT__Y:\n return 0xFF000000 | (0x00010101 * ((uint32_t)(row[x])));\n\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL: {\n uint8_t* palette = pb->private_impl.planes[3].ptr;\n return wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(\n wuffs_base__load_u32le__no_bounds_check(palette +\n (4 * ((size_t)row[x]))));\n }\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n return wuffs_base__color_u16_rgb_565__as__color_u32_argb_premul(\n wuffs_base__load_u16le__no_bounds_check(row + (2 * ((size_t)x))));\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n return 0xFF000000 |\n wuffs_base__load_u24le__no_bounds_check(row + (3 * ((size_t)x)));\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n re" +
@@ -47,50 +41,7 @@
"gr(color));\n break;\n\n default:\n // TODO: support more formats.\n return wuffs_base__make_status(wuffs_base__error__unsupported_option);\n }\n\n return wuffs_base__make_status(NULL);\n}\n\n" +
"" +
"// --------\n\nuint8_t //\nwuffs_base__pixel_palette__closest_element(\n wuffs_base__slice_u8 palette_slice,\n wuffs_base__pixel_format palette_format,\n wuffs_base__color_u32_argb_premul c) {\n size_t n = palette_slice.len / 4;\n if (n > 256) {\n n = 256;\n }\n size_t best_index = 0;\n uint64_t best_score = 0xFFFFFFFFFFFFFFFF;\n\n // Work in 16-bit color.\n uint32_t ca = 0x101 * (0xFF & (c >> 24));\n uint32_t cr = 0x101 * (0xFF & (c >> 16));\n uint32_t cg = 0x101 * (0xFF & (c >> 8));\n uint32_t cb = 0x101 * (0xFF & (c >> 0));\n\n switch (palette_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY: {\n bool nonpremul = palette_format.repr ==\n WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL;\n\n size_t i;\n for (i = 0; i < n; i++) {\n // Work in 16-bit color.\n uint32_t pb = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 0]))" +
- ";\n uint32_t pg = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 1]));\n uint32_t pr = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 2]));\n uint32_t pa = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 3]));\n\n // Convert to premultiplied alpha.\n if (nonpremul && (pa != 0xFFFF)) {\n pb = (pb * pa) / 0xFFFF;\n pg = (pg * pa) / 0xFFFF;\n pr = (pr * pa) / 0xFFFF;\n }\n\n // These deltas are conceptually int32_t (signed) but after squaring,\n // it's equivalent to work in uint32_t (unsigned).\n pb -= cb;\n pg -= cg;\n pr -= cr;\n pa -= ca;\n uint64_t score = ((uint64_t)(pb * pb)) + ((uint64_t)(pg * pg)) +\n ((uint64_t)(pr * pr)) + ((uint64_t)(pa * pa));\n if (best_score > score) {\n best_score = score;\n best_index = i;\n }\n }\n break;\n }\n }\n\n return (uint8_t)best_index;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n return wuffs_base__slice_u8__copy_from_slice(dst, src);\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__copy_3_3(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 = dst.len / 3;\n size_t src_len3 = src.len / 3;\n size_t len = dst_len3 < src_len3 ? dst_len3 : src_len3;\n if (len > 0) {\n memmove(dst.ptr, src.ptr, len * 3);\n }\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__copy_4_4(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 <" +
- " src_len4 ? dst_len4 : src_len4;\n if (len > 0) {\n memmove(dst.ptr, src.ptr, len * 4);\n }\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__bgr(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t src_len3 = src.len / 3;\n size_t len = dst_len2 < src_len3 ? dst_len2 : src_len3;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t b5 = s[0] >> 3;\n uint32_t g6 = s[1] >> 2;\n uint32_t r5 = s[2] >> 3;\n uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);\n wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);\n\n s += 1 * 3;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t src_len4 = src.len / 4;\n size_t len = " +
- "dst_len2 < src_len4 ? dst_len2 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n wuffs_base__store_u16le__no_bounds_check(\n d + (0 * 2),\n wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(\n wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(\n wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)))));\n\n s += 1 * 4;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * ((uint32_t)s[3]);\n uint32_t sr = 0" +
- "x101 * ((uint32_t)s[2]);\n uint32_t sg = 0x101 * ((uint32_t)s[1]);\n uint32_t sb = 0x101 * ((uint32_t)s[0]);\n\n // Convert from 565 color to 16-bit color.\n uint32_t old_rgb_565 = wuffs_base__load_u16le__no_bounds_check(d + (0 * 2));\n uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);\n uint32_t dr = (0x8421 * old_r5) >> 4;\n uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);\n uint32_t dg = (0x1041 * old_g6) >> 2;\n uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);\n uint32_t db = (0x8421 * old_b5) >> 4;\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n dr = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert from 16-bit color to 565 color and combine the components.\n uint32_t new_r5 = 0x1F & (dr >> 11);\n uint32_t new_g6 = 0x3F & (dg >> 10);\n uint32_t new_b5 = 0x1F & (db >> 11);\n uint32_t new_rgb" +
- "_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);\n wuffs_base__store_u16le__no_bounds_check(d + (0 * 2),\n (uint16_t)new_rgb_565);\n\n s += 1 * 4;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__y(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t len = dst_len2 < src.len ? dst_len2 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t y5 = s[0] >> 3;\n uint32_t y6 = s[0] >> 2;\n uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);\n wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);\n\n s += 1 * 1;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__index__src(\n wuffs_base__slice_u8" +
- " dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len2 = dst.len / 2;\n size_t len = dst_len2 < src.len ? dst_len2 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count) {\n wuffs_base__store_u16le__no_bounds_check(\n d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n wuffs_base__store_u16le__no_bounds_check(\n d + (1 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[1] * 4)));\n wuffs_base__store_u16le__no_bounds_check(\n d + (2 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[2] * 4)));\n wuffs_base__store_u16le__no_bounds_check(\n d + (3 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr" +
- " + ((size_t)s[3] * 4)));\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 2;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n wuffs_base__store_u16le__no_bounds_check(\n d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n\n s += 1 * 1;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len2 = dst.len / 2;\n size_t len = dst_len2 < src.len ? dst_len2 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u16le__no_bounds" +
- "_check(d + (0 * 2), (uint16_t)s0);\n }\n\n s += 1 * 1;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 = dst.len / 3;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t s0 =\n wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(\n wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)));\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n\n s += 1 * 4;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 = dst.len / 3;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;\n uint8_t* d = d" +
- "st.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * ((uint32_t)s[3]);\n uint32_t sr = 0x101 * ((uint32_t)s[2]);\n uint32_t sg = 0x101 * ((uint32_t)s[1]);\n uint32_t sb = 0x101 * ((uint32_t)s[0]);\n uint32_t dr = 0x101 * ((uint32_t)d[2]);\n uint32_t dg = 0x101 * ((uint32_t)d[1]);\n uint32_t db = 0x101 * ((uint32_t)d[0]);\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n dr = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert from 16-bit color to 8-bit color.\n d[0] = (uint8_t)(db >> 8);\n d[1] = (uint8_t)(dg >> 8);\n d[2] = (uint8_t)(dr >> 8);\n\n s += 1 * 4;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4),\n wuffs_base__composite_nonpremul_nonpremul_u32_axxx(d0, s0));\n\n s += 1 * 4;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4),\n wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));\n\n s += 1 * 4;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;\n ui" +
- "nt8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), wuffs_base__composite_premul_nonpremul_u32_axxx(d0, s0));\n\n s += 1 * 4;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxx__index__src(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len3 = dst.len / 3;\n size_t len = dst_len3 < src.len ? dst_len3 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n // The comparison in the while condition is \">\", not \">=\", because with\n // \">=\", the last 4-byte store could write past the end of the dst slice.\n //\n // Each 4-byte store writes one too many bytes, but a subsequent store\n // will overwrite that with the correct byte. There is always another\n // store, whether a 4-byte store in this loop or a 1-byte store in the\n // next loop.\n while (n > loop_unroll_count) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 3), wuffs_base__load_u32le__no_bounds_c" +
- "heck(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (1 * 3), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[1] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (2 * 3), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[2] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (3 * 3), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[3] * 4)));\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 3;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n\n s += 1 * 1;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__" +
- "pixel_swizzler__xxx__index_binary_alpha__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len3 = dst.len / 3;\n size_t len = dst_len3 < src.len ? dst_len3 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n }\n uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[1] * 4));\n if (s1) {\n wuffs_base__store_u24le__no_bounds_check(d + (1 * 3), s1);\n }\n uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n " +
- " ((size_t)s[2] * 4));\n if (s2) {\n wuffs_base__store_u24le__no_bounds_check(d + (2 * 3), s2);\n }\n uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[3] * 4));\n if (s3) {\n wuffs_base__store_u24le__no_bounds_check(d + (3 * 3), s3);\n }\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 3;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n }\n\n s += 1 * 1;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxx__y(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 =" +
- " dst.len / 3;\n size_t len = dst_len3 < src.len ? dst_len3 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint8_t s0 = s[0];\n d[0] = s0;\n d[1] = s0;\n d[2] = s0;\n\n s += 1 * 1;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__index__src(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len4 = dst.len / 4;\n size_t len = dst_len4 < src.len ? dst_len4 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (1 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[1] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (2 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_pale" +
- "tte.ptr + ((size_t)s[2] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (3 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[3] * 4)));\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 4;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n\n s += 1 * 1;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len4 = dst.len / 4;\n size_t len = dst_len4 < src.len ? dst_len4 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count)" +
- " {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);\n }\n uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[1] * 4));\n if (s1) {\n wuffs_base__store_u32le__no_bounds_check(d + (1 * 4), s1);\n }\n uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[2] * 4));\n if (s2) {\n wuffs_base__store_u32le__no_bounds_check(d + (2 * 4), s2);\n }\n uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[3] * 4));\n if (s3) {\n wuffs_base__store_u32le__no_bounds_check(d + (3 * 4), s3);\n }\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count *" +
- " 4;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);\n }\n\n s += 1 * 1;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__xxx(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len3 = src.len / 3;\n size_t len = dst_len4 < src_len3 ? dst_len4 : src_len3;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4),\n 0xFF000000 | wuffs_base__load_u24le__no_bounds_check(s + (0 * 3)));\n\n s += 1 * 3;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n" +
- "\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__y(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t len = dst_len4 < src.len ? dst_len4 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));\n\n s += 1 * 1;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\n" +
- "" +
- "// --------\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__y(wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n return wuffs_base__pixel_swizzler__bgr_565__y;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n return wuffs_base__pixel_swizzler__xxx__y;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__BGRX:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n case WU" +
- "FFS_BASE__PIXEL_FORMAT__RGBX:\n return wuffs_base__pixel_swizzler__xxxx__y;\n }\n return NULL;\n}\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(\n wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:\n if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=\n 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__copy_1_1;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n if (wuffs_base__pixel_swizzler__squash_bgr_565_888(dst_palette,\n " +
- " src_palette) != 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__bgr_565__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=\n 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_pa" +
- "lette) !=\n 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,\n src_palette) != 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n if (wuffs_base__pixel_swizzler__" +
- "swap_rgbx_bgrx(dst_palette,\n src_palette) != 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;\n }\n return NULL;\n }\n return NULL;\n}\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__bgr(wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n return wuffs_base__pixel_swizzler__bgr_565__bgr;\n\n case WUFFS_BASE__PIXEL_FORMAT__B" +
- "GR:\n return wuffs_base__pixel_swizzler__copy_3_3;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__BGRX:\n return wuffs_base__pixel_swizzler__xxxx__xxx;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__RGBX:\n // TODO.\n break;\n }\n return NULL;\n}\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__bgra_nonpremul(\n wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_b" +
- "ase__pixel_swizzler__bgr_565__bgra_nonpremul__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__copy_4_4;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swiz" +
- "zler__bgra_premul__bgra_nonpremul__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__BGRX:\n // TODO.\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__RGBX:\n // TODO.\n break;\n }\n return NULL;\n}\n\n" +
- "" +
- "// --------\n\nwuffs_base__status //\nwuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__pixel_format src_format,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n if (!p) {\n return wuffs_base__make_status(wuffs_base__error__bad_receiver);\n }\n\n // TODO: support many more formats.\n\n wuffs_base__pixel_swizzler__func func = NULL;\n\n switch (src_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__Y:\n func = wuffs_base__pixel_swizzler__prepare__y(p, dst_format, dst_palette,\n src_palette, blend);\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:\n func = wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(\n p, dst_format, dst_" +
- "palette, src_palette, blend);\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n func = wuffs_base__pixel_swizzler__prepare__bgr(\n p, dst_format, dst_palette, src_palette, blend);\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n func = wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(\n p, dst_format, dst_palette, src_palette, blend);\n break;\n }\n\n p->private_impl.func = func;\n return wuffs_base__make_status(\n func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);\n}\n\nuint64_t //\nwuffs_base__pixel_swizzler__swizzle_interleaved(\n const wuffs_base__pixel_swizzler* p,\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (p && p->private_impl.func) {\n return (*p->private_impl.func)(dst, dst_palette, src);\n }\n return 0;\n}\n" +
+ ";\n uint32_t pg = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 1]));\n uint32_t pr = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 2]));\n uint32_t pa = 0x101 * ((uint32_t)(palette_slice.ptr[(4 * i) + 3]));\n\n // Convert to premultiplied alpha.\n if (nonpremul && (pa != 0xFFFF)) {\n pb = (pb * pa) / 0xFFFF;\n pg = (pg * pa) / 0xFFFF;\n pr = (pr * pa) / 0xFFFF;\n }\n\n // These deltas are conceptually int32_t (signed) but after squaring,\n // it's equivalent to work in uint32_t (unsigned).\n pb -= cb;\n pg -= cg;\n pr -= cr;\n pa -= ca;\n uint64_t score = ((uint64_t)(pb * pb)) + ((uint64_t)(pg * pg)) +\n ((uint64_t)(pr * pr)) + ((uint64_t)(pa * pa));\n if (best_score > score) {\n best_score = score;\n best_index = i;\n }\n }\n break;\n }\n }\n\n return (uint8_t)best_index;\n}\n" +
""
const baseStrConvImplC = "" +
@@ -105,8 +56,21 @@
"alue = +(int64_t)(r.value);\n return ret;\n }\n } while (0);\n\nfail_bad_argument:\n do {\n wuffs_base__result_i64 ret;\n ret.status.repr = wuffs_base__error__bad_argument;\n ret.value = 0;\n return ret;\n } while (0);\n\nfail_out_of_bounds:\n do {\n wuffs_base__result_i64 ret;\n ret.status.repr = wuffs_base__error__out_of_bounds;\n ret.value = 0;\n return ret;\n } while (0);\n}\n\nwuffs_base__result_u64 //\nwuffs_base__parse_number_u64(wuffs_base__slice_u8 s) {\n uint8_t* p = s.ptr;\n uint8_t* q = s.ptr + s.len;\n\n for (; (p < q) && (*p == '_'); p++) {\n }\n\n if (p >= q) {\n goto fail_bad_argument;\n\n } else if (*p == '0') {\n p++;\n if (p >= q) {\n goto ok_zero;\n }\n if (*p == '_') {\n p++;\n for (; p < q; p++) {\n if (*p != '_') {\n goto fail_bad_argument;\n }\n }\n goto ok_zero;\n }\n\n if ((*p == 'x') || (*p == 'X')) {\n p++;\n for (; (p < q) && (*p == '_'); p++) {\n }\n if (p < q) {\n goto hexadecimal;\n }\n\n " +
" } else if ((*p == 'd') || (*p == 'D')) {\n p++;\n for (; (p < q) && (*p == '_'); p++) {\n }\n if (p < q) {\n goto decimal;\n }\n }\n\n goto fail_bad_argument;\n }\n\ndecimal:\n do {\n uint64_t v = wuffs_base__parse_number__decimal_digits[*p++];\n if (v == 0) {\n goto fail_bad_argument;\n }\n v &= 0x0F;\n\n // UINT64_MAX is 18446744073709551615, which is ((10 * max10) + max1).\n const uint64_t max10 = 1844674407370955161;\n const uint8_t max1 = 5;\n\n for (; p < q; p++) {\n if (*p == '_') {\n continue;\n }\n uint8_t digit = wuffs_base__parse_number__decimal_digits[*p];\n if (digit == 0) {\n goto fail_bad_argument;\n }\n digit &= 0x0F;\n if ((v > max10) || ((v == max10) && (digit > max1))) {\n goto fail_out_of_bounds;\n }\n v = (10 * v) + ((uint64_t)(digit));\n }\n\n wuffs_base__result_u64 ret;\n ret.status.repr = NULL;\n ret.value = v;\n return ret;\n } while (0);\n\nhexadecimal:\n do {\n uint64_t v = " +
"wuffs_base__parse_number__hexadecimal_digits[*p++];\n if (v == 0) {\n goto fail_bad_argument;\n }\n v &= 0x0F;\n\n for (; p < q; p++) {\n if (*p == '_') {\n continue;\n }\n uint8_t digit = wuffs_base__parse_number__hexadecimal_digits[*p];\n if (digit == 0) {\n goto fail_bad_argument;\n }\n digit &= 0x0F;\n if ((v >> 60) != 0) {\n goto fail_out_of_bounds;\n }\n v = (v << 4) | ((uint64_t)(digit));\n }\n\n wuffs_base__result_u64 ret;\n ret.status.repr = NULL;\n ret.value = v;\n return ret;\n } while (0);\n\nok_zero:\n do {\n wuffs_base__result_u64 ret;\n ret.status.repr = NULL;\n ret.value = 0;\n return ret;\n } while (0);\n\nfail_bad_argument:\n do {\n wuffs_base__result_u64 ret;\n ret.status.repr = wuffs_base__error__bad_argument;\n ret.value = 0;\n return ret;\n } while (0);\n\nfail_out_of_bounds:\n do {\n wuffs_base__result_u64 ret;\n ret.status.repr = wuffs_base__error__out_of_bounds;\n ret.value = 0;\n return ret;\n " +
- " } while (0);\n}\n\n " +
+ " } while (0);\n}\n\n" +
"" +
+ "// ---------------- Hexadecimal\n\nsize_t //\nwuffs_base__hexadecimal__decode2(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t src_len2 = src.len / 2;\n size_t len = dst.len < src_len2 ? dst.len : src_len2;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n while (n--) {\n *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[0]] << 4) |\n (wuffs_base__parse_number__hexadecimal_digits[s[1]] & 0x0F));\n d += 1;\n s += 2;\n }\n\n return len;\n}\n\nsize_t //\nwuffs_base__hexadecimal__decode4(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t src_len4 = src.len / 4;\n size_t len = dst.len < src_len4 ? dst.len : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n while (n--) {\n *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[2]] << 4) |\n (wuffs_base__parse_number__hexadecimal_digits[s[3]] & 0x0F));\n d += 1;\n s +" +
+ "= 4;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// ---------------- Unicode and UTF-8\n\nsize_t //\nwuffs_base__utf_8__encode(wuffs_base__slice_u8 dst, uint32_t code_point) {\n if (code_point <= 0x7F) {\n if (dst.len >= 1) {\n dst.ptr[0] = (uint8_t)(code_point);\n return 1;\n }\n\n } else if (code_point <= 0x07FF) {\n if (dst.len >= 2) {\n dst.ptr[0] = (uint8_t)(0xC0 | ((code_point >> 6)));\n dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));\n return 2;\n }\n\n } else if (code_point <= 0xFFFF) {\n if ((dst.len >= 3) && ((code_point < 0xD800) || (0xDFFF < code_point))) {\n dst.ptr[0] = (uint8_t)(0xE0 | ((code_point >> 12)));\n dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));\n dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));\n return 3;\n }\n\n } else if (code_point <= 0x10FFFF) {\n if (dst.len >= 4) {\n dst.ptr[0] = (uint8_t)(0xF0 | ((code_point >> 18)));\n dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 12) & 0x3F));\n dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3" +
+ "F));\n dst.ptr[3] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));\n return 4;\n }\n }\n\n return 0;\n}\n\n// wuffs_base__utf_8__byte_length_minus_1 is the byte length (minus 1) of a\n// UTF-8 encoded code point, based on the encoding's initial byte.\n// - 0x00 is 1-byte UTF-8 (ASCII).\n// - 0x01 is the start of 2-byte UTF-8.\n// - 0x02 is the start of 3-byte UTF-8.\n// - 0x03 is the start of 4-byte UTF-8.\n// - 0x40 is a UTF-8 tail byte.\n// - 0x80 is invalid UTF-8.\n//\n// RFC 3629 (UTF-8) gives this grammar for valid UTF-8:\n// UTF8-1 = %x00-7F\n// UTF8-2 = %xC2-DF UTF8-tail\n// UTF8-3 = %xE0 %xA0-BF UTF8-tail / %xE1-EC 2( UTF8-tail ) /\n// %xED %x80-9F UTF8-tail / %xEE-EF 2( UTF8-tail )\n// UTF8-4 = %xF0 %x90-BF 2( UTF8-tail ) / %xF1-F3 3( UTF8-tail ) /\n// %xF4 %x80-8F 2( UTF8-tail )\n// UTF8-tail = %x80-BF\nstatic const uint8_t wuffs_base__utf_8__byte_length_minus_1[256] = {\n // 0 1 2 3 4 5 6 7\n // 8 9" +
+ " A B C D E F\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00 ..= 0x07.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x08 ..= 0x0F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x10 ..= 0x17.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x18 ..= 0x1F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x20 ..= 0x27.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x28 ..= 0x2F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x30 ..= 0x37.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x38 ..= 0x3F.\n\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x40 ..= 0x47.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x48 ..= 0x4F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x50 ..= 0x57.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x58 ..= 0x5F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x60 ..= 0x67.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x68 .." +
+ "= 0x6F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x70 ..= 0x77.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x78 ..= 0x7F.\n\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x80 ..= 0x87.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x88 ..= 0x8F.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x90 ..= 0x97.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x98 ..= 0x9F.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA0 ..= 0xA7.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA8 ..= 0xAF.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB0 ..= 0xB7.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB8 ..= 0xBF.\n\n 0x80, 0x80, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC0 ..= 0xC7.\n 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC8 ..= 0xCF.\n 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD0 ..= 0xD7.\n 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD8 ..= 0xDF.\n 0x02, 0x02, 0x02" +
+ ", 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE0 ..= 0xE7.\n 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE8 ..= 0xEF.\n 0x03, 0x03, 0x03, 0x03, 0x03, 0x80, 0x80, 0x80, // 0xF0 ..= 0xF7.\n 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 0xF8 ..= 0xFF.\n // 0 1 2 3 4 5 6 7\n // 8 9 A B C D E F\n};\n\nwuffs_base__utf_8__next__output //\nwuffs_base__utf_8__next(wuffs_base__slice_u8 s) {\n if (s.len == 0) {\n return wuffs_base__make_utf_8__next__output(0, 0);\n }\n uint32_t c = s.ptr[0];\n switch (wuffs_base__utf_8__byte_length_minus_1[c & 0xFF]) {\n case 0:\n return wuffs_base__make_utf_8__next__output(c, 1);\n\n case 1:\n if (s.len < 2) {\n break;\n }\n c = wuffs_base__load_u16le__no_bounds_check(s.ptr);\n if ((c & 0xC000) != 0x8000) {\n break;\n }\n c = (0x0007C0 & (c << 6)) | (0x00003F & (c >> 8));\n return wuffs_base__make_utf_8__next__output(c, 2);\n\n case 2:\n if (s.len < 3) {\n " +
+ " break;\n }\n c = wuffs_base__load_u24le__no_bounds_check(s.ptr);\n if ((c & 0xC0C000) != 0x808000) {\n break;\n }\n c = (0x00F000 & (c << 12)) | (0x000FC0 & (c >> 2)) |\n (0x00003F & (c >> 16));\n if ((c <= 0x07FF) || ((0xD800 <= c) && (c <= 0xDFFF))) {\n break;\n }\n return wuffs_base__make_utf_8__next__output(c, 3);\n\n case 3:\n if (s.len < 4) {\n break;\n }\n c = wuffs_base__load_u32le__no_bounds_check(s.ptr);\n if ((c & 0xC0C0C000) != 0x80808000) {\n break;\n }\n c = (0x1C0000 & (c << 18)) | (0x03F000 & (c << 4)) |\n (0x000FC0 & (c >> 10)) | (0x00003F & (c >> 24));\n if ((c <= 0xFFFF) || (0x110000 <= c)) {\n break;\n }\n return wuffs_base__make_utf_8__next__output(c, 4);\n }\n\n return wuffs_base__make_utf_8__next__output(\n WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, 1);\n}\n\nsize_t //\nwuffs_base__utf_8__longest_valid_prefix(wuffs_base__slice_u8 s) {\n // TODO: possibly optimize the all-A" +
+ "SCII case (4 or 8 bytes at a time).\n //\n // TODO: possibly optimize this by manually inlining the\n // wuffs_base__utf_8__next calls.\n size_t original_len = s.len;\n while (s.len > 0) {\n wuffs_base__utf_8__next__output o = wuffs_base__utf_8__next(s);\n if ((o.code_point > 0x7F) && (o.byte_length == 1)) {\n break;\n }\n s.ptr += o.byte_length;\n s.len -= o.byte_length;\n }\n return original_len - s.len;\n}\n\nsize_t //\nwuffs_base__ascii__longest_valid_prefix(wuffs_base__slice_u8 s) {\n // TODO: possibly optimize this by checking 4 or 8 bytes at a time.\n uint8_t* original_ptr = s.ptr;\n uint8_t* p = s.ptr;\n uint8_t* q = s.ptr + s.len;\n for (; (p != q) && ((*p & 0x80) == 0); p++) {\n }\n return (size_t)(p - original_ptr);\n}\n" +
+ ""
+
+const baseF64ConvSubmoduleC = "" +
"// ---------------- IEEE 754 Floating Point\n\n#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE 1023\n#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION 500\n\n// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL is the largest N\n// such that ((10 << N) < (1 << 64)).\n#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL 60\n\n// wuffs_base__private_implementation__high_prec_dec (abbreviated as HPD) is a\n// fixed precision floating point decimal number, augmented with ±infinity\n// values, but it cannot represent NaN (Not a Number).\n//\n// \"High precision\" means that the mantissa holds 500 decimal digits. 500 is\n// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION.\n//\n// An HPD isn't for general purpose arithmetic, only for conversions to and\n// from IEEE 754 double-precision floating point, where the largest and\n// smallest positive, finite values are approximately 1.8e+308 and 4.9e-324.\n// HPD exponents above +1023 mean infinity, below -1023 mean zero. Th" +
"e ±1023\n// bounds are further away from zero than ±(324 + 500), where 500 and 1023 is\n// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION and\n// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE.\n//\n// digits[.. num_digits] are the number's digits in big-endian order. The\n// uint8_t values are in the range [0 ..= 9], not ['0' ..= '9'], where e.g. '7'\n// is the ASCII value 0x37.\n//\n// decimal_point is the index (within digits) of the decimal point. It may be\n// negative or be larger than num_digits, in which case the explicit digits are\n// padded with implicit zeroes.\n//\n// For example, if num_digits is 3 and digits is \"\\x07\\x08\\x09\":\n// - A decimal_point of -2 means \".00789\"\n// - A decimal_point of -1 means \".0789\"\n// - A decimal_point of +0 means \".789\"\n// - A decimal_point of +1 means \"7.89\"\n// - A decimal_point of +2 means \"78.9\"\n// - A decimal_point of +3 means \"789.\"\n// - A decimal_point of +4 means \"7890.\"\n// - A decimal_point of +5 means \"78900.\"\n//\n// As above, a" +
" decimal_point higher than +1023 means that the overall value is\n// infinity, lower than -1023 means zero.\n//\n// negative is a sign bit. An HPD can distinguish positive and negative zero.\n//\n// truncated is whether there are more than\n// WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION digits, and at\n// least one of those extra digits are non-zero. The existence of long-tail\n// digits can affect rounding.\n//\n// The \"all fields are zero\" value is valid, and represents the number +0.\ntypedef struct {\n uint32_t num_digits;\n int32_t decimal_point;\n bool negative;\n bool truncated;\n uint8_t digits[WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DIGITS_PRECISION];\n} wuffs_base__private_implementation__high_prec_dec;\n\n// wuffs_base__private_implementation__high_prec_dec__trim trims trailing\n// zeroes from the h->digits[.. h->num_digits] slice. They have no benefit,\n// since we explicitly track h->decimal_point.\n//\n// Preconditions:\n// - h is non-NULL.\nstatic inline void //\nwuffs_base__private_implementation_" +
@@ -162,18 +126,62 @@
"shift =\n (n < num_powers)\n ? powers[n]\n : WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;\n\n wuffs_base__private_implementation__high_prec_dec__small_rshift(&h,\n shift);\n if (h.decimal_point <\n -WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {\n goto zero;\n }\n exp2 += (int32_t)shift;\n }\n // ...then we shift left, putting us in [½ .. 1].\n while (h.decimal_point <= 0) {\n uint32_t shift;\n if (h.decimal_point == 0) {\n if (h.digits[0] >= 5) {\n break;\n }\n shift = (h.digits[0] <= 2) ? 2 : 1;\n } else {\n uint32_t n = (uint32_t)(-h.decimal_point);\n shift = (n < num_powers)\n ? powers[n]\n : WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;\n }\n\n wuffs_base__private_implementation__high_prec_dec__small_lshift(&h,\n " +
" shift);\n if (h.decimal_point >\n +WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE) {\n goto infinity;\n }\n exp2 -= (int32_t)shift;\n }\n\n // We're in the range [½ .. 1] but f64 uses [1 .. 2].\n exp2--;\n\n // The minimum normal exponent is (f64_bias + 1).\n while ((f64_bias + 1) > exp2) {\n uint32_t n = (uint32_t)((f64_bias + 1) - exp2);\n if (n > WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL) {\n n = WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__SHIFT__MAX_INCL;\n }\n wuffs_base__private_implementation__high_prec_dec__small_rshift(&h, n);\n exp2 += (int32_t)n;\n }\n\n // Check for overflow.\n if ((exp2 - f64_bias) >= 0x07FF) { // (1 << 11) - 1.\n goto infinity;\n }\n\n // Extract 53 bits for the mantissa (in base-2).\n wuffs_base__private_implementation__high_prec_dec__small_lshift(&h, 53);\n uint64_t man2 =\n wuffs_base__private_implementation__high_prec_dec_" +
"_rounded_integer(&h);\n\n // Rounding might have added one bit. If so, shift and re-check overflow.\n if ((man2 >> 53) != 0) {\n man2 >>= 1;\n exp2++;\n if ((exp2 - f64_bias) >= 0x07FF) { // (1 << 11) - 1.\n goto infinity;\n }\n }\n\n // Handle subnormal numbers.\n if ((man2 >> 52) == 0) {\n exp2 = f64_bias;\n }\n\n // Pack the bits and return.\n uint64_t exp2_bits =\n (uint64_t)((exp2 - f64_bias) & 0x07FF); // (1 << 11) - 1.\n uint64_t bits = (man2 & 0x000FFFFFFFFFFFFF) | // (1 << 52) - 1.\n (exp2_bits << 52) | //\n (h.negative ? 0x8000000000000000 : 0); // (1 << 63).\n\n wuffs_base__result_f64 ret;\n ret.status.repr = NULL;\n ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);\n return ret;\n } while (0);\n\nzero:\n do {\n uint64_t bits = h.negative ? 0x8000000000000000 : 0;\n\n wuffs_base__result_f64 ret;\n ret.status.repr = NULL;\n ret.value = wuffs_base" +
- "__ieee_754_bit_representation__to_f64(bits);\n return ret;\n } while (0);\n\ninfinity:\n do {\n uint64_t bits = h.negative ? 0xFFF0000000000000 : 0x7FF0000000000000;\n\n wuffs_base__result_f64 ret;\n ret.status.repr = NULL;\n ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);\n return ret;\n } while (0);\n}\n\n" +
+ "__ieee_754_bit_representation__to_f64(bits);\n return ret;\n } while (0);\n\ninfinity:\n do {\n uint64_t bits = h.negative ? 0xFFF0000000000000 : 0x7FF0000000000000;\n\n wuffs_base__result_f64 ret;\n ret.status.repr = NULL;\n ret.value = wuffs_base__ieee_754_bit_representation__to_f64(bits);\n return ret;\n } while (0);\n}\n" +
+ ""
+
+const basePixConvSubmoduleC = "" +
+ "// ---------------- Pixel Swizzler\n\nstatic inline uint32_t //\nwuffs_base__composite_nonpremul_nonpremul_u32_axxx(uint32_t dst_nonpremul,\n uint32_t src_nonpremul) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));\n\n // Convert dst from nonpremul to premul.\n dr = (dr * da) / 0xFFFF;\n dg = (dg * da) / 0xFFFF;\n db = (db * da) / 0xFFFF;\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr" +
+ " = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert dst from premul to nonpremul.\n if (da != 0) {\n dr = (dr * 0xFFFF) / da;\n dg = (dg * 0xFFFF) / da;\n db = (db * 0xFFFF) / da;\n }\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\nstatic inline uint32_t //\nwuffs_base__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,\n uint32_t src_premul) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));\n uint32_t dg = 0x101 * (0xFF " +
+ "& (dst_nonpremul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));\n\n // Convert dst from nonpremul to premul.\n dr = (dr * da) / 0xFFFF;\n dg = (dg * da) / 0xFFFF;\n db = (db * da) / 0xFFFF;\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (premul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = sr + ((dr * ia) / 0xFFFF);\n dg = sg + ((dg * ia) / 0xFFFF);\n db = sb + ((db * ia) / 0xFFFF);\n\n // Convert dst from premul to nonpremul.\n if (da != 0) {\n dr = (dr * 0xFFFF) / da;\n dg = (dg * 0xFFFF) / da;\n db = (db * 0xFFFF) / da;\n }\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\nstatic inline uint32_t //\nwuffs_base__composite_premul_nonpremul_u32_axxx(uint32_t dst_premul,\n uint32_t src_nonpremul) {\n // Convert from 8-bit c" +
+ "olor to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}\n\nstatic inline uint32_t //\nwuffs_base__composite_premul_premul_u32_axxx(ui" +
+ "nt32_t dst_premul,\n uint32_t src_premul) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));\n uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));\n uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));\n uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));\n uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));\n uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));\n uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));\n uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (premul) over dst (premul).\n da = sa + ((da * ia) / 0xFFFF);\n dr = sr + ((dr * ia) / 0xFFFF);\n dg = sg + ((dg * ia) / 0xFFFF);\n db = sb + ((db * ia) / 0xFFFF);\n\n // Convert from 16-bit color to 8-bit color and combine the components.\n da >>= 8;\n dr >>= 8;\n dg >>= 8;\n db >>= 8;\n return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);\n}" +
+ "\n\n" +
"" +
- "// ---------------- Hexadecimal\n\nsize_t //\nwuffs_base__hexadecimal__decode2(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t src_len2 = src.len / 2;\n size_t len = dst.len < src_len2 ? dst.len : src_len2;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n while (n--) {\n *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[0]] << 4) |\n (wuffs_base__parse_number__hexadecimal_digits[s[1]] & 0x0F));\n d += 1;\n s += 2;\n }\n\n return len;\n}\n\nsize_t //\nwuffs_base__hexadecimal__decode4(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t src_len4 = src.len / 4;\n size_t len = dst.len < src_len4 ? dst.len : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n while (n--) {\n *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[2]] << 4) |\n (wuffs_base__parse_number__hexadecimal_digits[s[3]] & 0x0F));\n d += 1;\n s +" +
- "= 4;\n }\n\n return len;\n}\n\n" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__squash_bgr_565_888(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n\n size_t n = len4;\n while (n--) {\n uint32_t argb = wuffs_base__load_u32le__no_bounds_check(s);\n uint32_t b5 = 0x1F & (argb >> (8 - 5));\n uint32_t g6 = 0x3F & (argb >> (16 - 6));\n uint32_t r5 = 0x1F & (argb >> (24 - 5));\n uint32_t alpha = argb & 0xFF000000;\n wuffs_base__store_u32le__no_bounds_check(\n d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));\n s += 4;\n d += 4;\n }\n return len4 * 4;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 src) {\n size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n\n size_t n = len4;\n while (n--) {\n " +
+ " uint8_t b0 = s[0];\n uint8_t b1 = s[1];\n uint8_t b2 = s[2];\n uint8_t b3 = s[3];\n d[0] = b2;\n d[1] = b1;\n d[2] = b0;\n d[3] = b3;\n s += 4;\n d += 4;\n }\n return len4 * 4;\n}\n\n" +
"" +
- "// ---------------- Unicode and UTF-8\n\nsize_t //\nwuffs_base__utf_8__encode(wuffs_base__slice_u8 dst, uint32_t code_point) {\n if (code_point <= 0x7F) {\n if (dst.len >= 1) {\n dst.ptr[0] = (uint8_t)(code_point);\n return 1;\n }\n\n } else if (code_point <= 0x07FF) {\n if (dst.len >= 2) {\n dst.ptr[0] = (uint8_t)(0xC0 | ((code_point >> 6)));\n dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));\n return 2;\n }\n\n } else if (code_point <= 0xFFFF) {\n if ((dst.len >= 3) && ((code_point < 0xD800) || (0xDFFF < code_point))) {\n dst.ptr[0] = (uint8_t)(0xE0 | ((code_point >> 12)));\n dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));\n dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));\n return 3;\n }\n\n } else if (code_point <= 0x10FFFF) {\n if (dst.len >= 4) {\n dst.ptr[0] = (uint8_t)(0xF0 | ((code_point >> 18)));\n dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 12) & 0x3F));\n dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3" +
- "F));\n dst.ptr[3] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));\n return 4;\n }\n }\n\n return 0;\n}\n\n// wuffs_base__utf_8__byte_length_minus_1 is the byte length (minus 1) of a\n// UTF-8 encoded code point, based on the encoding's initial byte.\n// - 0x00 is 1-byte UTF-8 (ASCII).\n// - 0x01 is the start of 2-byte UTF-8.\n// - 0x02 is the start of 3-byte UTF-8.\n// - 0x03 is the start of 4-byte UTF-8.\n// - 0x40 is a UTF-8 tail byte.\n// - 0x80 is invalid UTF-8.\n//\n// RFC 3629 (UTF-8) gives this grammar for valid UTF-8:\n// UTF8-1 = %x00-7F\n// UTF8-2 = %xC2-DF UTF8-tail\n// UTF8-3 = %xE0 %xA0-BF UTF8-tail / %xE1-EC 2( UTF8-tail ) /\n// %xED %x80-9F UTF8-tail / %xEE-EF 2( UTF8-tail )\n// UTF8-4 = %xF0 %x90-BF 2( UTF8-tail ) / %xF1-F3 3( UTF8-tail ) /\n// %xF4 %x80-8F 2( UTF8-tail )\n// UTF8-tail = %x80-BF\nstatic const uint8_t wuffs_base__utf_8__byte_length_minus_1[256] = {\n // 0 1 2 3 4 5 6 7\n // 8 9" +
- " A B C D E F\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00 ..= 0x07.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x08 ..= 0x0F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x10 ..= 0x17.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x18 ..= 0x1F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x20 ..= 0x27.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x28 ..= 0x2F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x30 ..= 0x37.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x38 ..= 0x3F.\n\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x40 ..= 0x47.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x48 ..= 0x4F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x50 ..= 0x57.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x58 ..= 0x5F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x60 ..= 0x67.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x68 .." +
- "= 0x6F.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x70 ..= 0x77.\n 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x78 ..= 0x7F.\n\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x80 ..= 0x87.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x88 ..= 0x8F.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x90 ..= 0x97.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x98 ..= 0x9F.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA0 ..= 0xA7.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA8 ..= 0xAF.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB0 ..= 0xB7.\n 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB8 ..= 0xBF.\n\n 0x80, 0x80, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC0 ..= 0xC7.\n 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC8 ..= 0xCF.\n 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD0 ..= 0xD7.\n 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD8 ..= 0xDF.\n 0x02, 0x02, 0x02" +
- ", 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE0 ..= 0xE7.\n 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE8 ..= 0xEF.\n 0x03, 0x03, 0x03, 0x03, 0x03, 0x80, 0x80, 0x80, // 0xF0 ..= 0xF7.\n 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 0xF8 ..= 0xFF.\n // 0 1 2 3 4 5 6 7\n // 8 9 A B C D E F\n};\n\nwuffs_base__utf_8__next__output //\nwuffs_base__utf_8__next(wuffs_base__slice_u8 s) {\n if (s.len == 0) {\n return wuffs_base__make_utf_8__next__output(0, 0);\n }\n uint32_t c = s.ptr[0];\n switch (wuffs_base__utf_8__byte_length_minus_1[c & 0xFF]) {\n case 0:\n return wuffs_base__make_utf_8__next__output(c, 1);\n\n case 1:\n if (s.len < 2) {\n break;\n }\n c = wuffs_base__load_u16le__no_bounds_check(s.ptr);\n if ((c & 0xC000) != 0x8000) {\n break;\n }\n c = (0x0007C0 & (c << 6)) | (0x00003F & (c >> 8));\n return wuffs_base__make_utf_8__next__output(c, 2);\n\n case 2:\n if (s.len < 3) {\n " +
- " break;\n }\n c = wuffs_base__load_u24le__no_bounds_check(s.ptr);\n if ((c & 0xC0C000) != 0x808000) {\n break;\n }\n c = (0x00F000 & (c << 12)) | (0x000FC0 & (c >> 2)) |\n (0x00003F & (c >> 16));\n if ((c <= 0x07FF) || ((0xD800 <= c) && (c <= 0xDFFF))) {\n break;\n }\n return wuffs_base__make_utf_8__next__output(c, 3);\n\n case 3:\n if (s.len < 4) {\n break;\n }\n c = wuffs_base__load_u32le__no_bounds_check(s.ptr);\n if ((c & 0xC0C0C000) != 0x80808000) {\n break;\n }\n c = (0x1C0000 & (c << 18)) | (0x03F000 & (c << 4)) |\n (0x000FC0 & (c >> 10)) | (0x00003F & (c >> 24));\n if ((c <= 0xFFFF) || (0x110000 <= c)) {\n break;\n }\n return wuffs_base__make_utf_8__next__output(c, 4);\n }\n\n return wuffs_base__make_utf_8__next__output(\n WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, 1);\n}\n\nsize_t //\nwuffs_base__utf_8__longest_valid_prefix(wuffs_base__slice_u8 s) {\n // TODO: possibly optimize the all-A" +
- "SCII case (4 or 8 bytes at a time).\n //\n // TODO: possibly optimize this by manually inlining the\n // wuffs_base__utf_8__next calls.\n size_t original_len = s.len;\n while (s.len > 0) {\n wuffs_base__utf_8__next__output o = wuffs_base__utf_8__next(s);\n if ((o.code_point > 0x7F) && (o.byte_length == 1)) {\n break;\n }\n s.ptr += o.byte_length;\n s.len -= o.byte_length;\n }\n return original_len - s.len;\n}\n\nsize_t //\nwuffs_base__ascii__longest_valid_prefix(wuffs_base__slice_u8 s) {\n // TODO: possibly optimize this by checking 4 or 8 bytes at a time.\n uint8_t* original_ptr = s.ptr;\n uint8_t* p = s.ptr;\n uint8_t* q = s.ptr + s.len;\n for (; (p != q) && ((*p & 0x80) == 0); p++) {\n }\n return (size_t)(p - original_ptr);\n}\n" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n return wuffs_base__slice_u8__copy_from_slice(dst, src);\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__copy_3_3(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 = dst.len / 3;\n size_t src_len3 = src.len / 3;\n size_t len = dst_len3 < src_len3 ? dst_len3 : src_len3;\n if (len > 0) {\n memmove(dst.ptr, src.ptr, len * 3);\n }\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__copy_4_4(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 <" +
+ " src_len4 ? dst_len4 : src_len4;\n if (len > 0) {\n memmove(dst.ptr, src.ptr, len * 4);\n }\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__bgr(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t src_len3 = src.len / 3;\n size_t len = dst_len2 < src_len3 ? dst_len2 : src_len3;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t b5 = s[0] >> 3;\n uint32_t g6 = s[1] >> 2;\n uint32_t r5 = s[2] >> 3;\n uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);\n wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);\n\n s += 1 * 3;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t src_len4 = src.len / 4;\n size_t len = " +
+ "dst_len2 < src_len4 ? dst_len2 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n wuffs_base__store_u16le__no_bounds_check(\n d + (0 * 2),\n wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(\n wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(\n wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)))));\n\n s += 1 * 4;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * ((uint32_t)s[3]);\n uint32_t sr = 0" +
+ "x101 * ((uint32_t)s[2]);\n uint32_t sg = 0x101 * ((uint32_t)s[1]);\n uint32_t sb = 0x101 * ((uint32_t)s[0]);\n\n // Convert from 565 color to 16-bit color.\n uint32_t old_rgb_565 = wuffs_base__load_u16le__no_bounds_check(d + (0 * 2));\n uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);\n uint32_t dr = (0x8421 * old_r5) >> 4;\n uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);\n uint32_t dg = (0x1041 * old_g6) >> 2;\n uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);\n uint32_t db = (0x8421 * old_b5) >> 4;\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n dr = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert from 16-bit color to 565 color and combine the components.\n uint32_t new_r5 = 0x1F & (dr >> 11);\n uint32_t new_g6 = 0x3F & (dg >> 10);\n uint32_t new_b5 = 0x1F & (db >> 11);\n uint32_t new_rgb" +
+ "_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);\n wuffs_base__store_u16le__no_bounds_check(d + (0 * 2),\n (uint16_t)new_rgb_565);\n\n s += 1 * 4;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__y(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len2 = dst.len / 2;\n size_t len = dst_len2 < src.len ? dst_len2 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t y5 = s[0] >> 3;\n uint32_t y6 = s[0] >> 2;\n uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);\n wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);\n\n s += 1 * 1;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__index__src(\n wuffs_base__slice_u8" +
+ " dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len2 = dst.len / 2;\n size_t len = dst_len2 < src.len ? dst_len2 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count) {\n wuffs_base__store_u16le__no_bounds_check(\n d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n wuffs_base__store_u16le__no_bounds_check(\n d + (1 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[1] * 4)));\n wuffs_base__store_u16le__no_bounds_check(\n d + (2 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[2] * 4)));\n wuffs_base__store_u16le__no_bounds_check(\n d + (3 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr" +
+ " + ((size_t)s[3] * 4)));\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 2;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n wuffs_base__store_u16le__no_bounds_check(\n d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n\n s += 1 * 1;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len2 = dst.len / 2;\n size_t len = dst_len2 < src.len ? dst_len2 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u16le__no_bounds" +
+ "_check(d + (0 * 2), (uint16_t)s0);\n }\n\n s += 1 * 1;\n d += 1 * 2;\n n -= 1;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 = dst.len / 3;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t s0 =\n wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(\n wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)));\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n\n s += 1 * 4;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 = dst.len / 3;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;\n uint8_t* d = d" +
+ "st.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n // Convert from 8-bit color to 16-bit color.\n uint32_t sa = 0x101 * ((uint32_t)s[3]);\n uint32_t sr = 0x101 * ((uint32_t)s[2]);\n uint32_t sg = 0x101 * ((uint32_t)s[1]);\n uint32_t sb = 0x101 * ((uint32_t)s[0]);\n uint32_t dr = 0x101 * ((uint32_t)d[2]);\n uint32_t dg = 0x101 * ((uint32_t)d[1]);\n uint32_t db = 0x101 * ((uint32_t)d[0]);\n\n // Calculate the inverse of the src-alpha: how much of the dst to keep.\n uint32_t ia = 0xFFFF - sa;\n\n // Composite src (nonpremul) over dst (premul).\n dr = ((sr * sa) + (dr * ia)) / 0xFFFF;\n dg = ((sg * sa) + (dg * ia)) / 0xFFFF;\n db = ((sb * sa) + (db * ia)) / 0xFFFF;\n\n // Convert from 16-bit color to 8-bit color.\n d[0] = (uint8_t)(db >> 8);\n d[1] = (uint8_t)(dg >> 8);\n d[2] = (uint8_t)(dr >> 8);\n\n s += 1 * 4;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4),\n wuffs_base__composite_nonpremul_nonpremul_u32_axxx(d0, s0));\n\n s += 1 * 4;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4),\n wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));\n\n s += 1 * 4;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len4 = src.len / 4;\n size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;\n ui" +
+ "nt8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), wuffs_base__composite_premul_nonpremul_u32_axxx(d0, s0));\n\n s += 1 * 4;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxx__index__src(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len3 = dst.len / 3;\n size_t len = dst_len3 < src.len ? dst_len3 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n // The comparison in the while condition is \">\", not \">=\", because with\n // \">=\", the last 4-byte store could write past the end of the dst slice.\n //\n // Each 4-byte store writes one too many bytes, but a subsequent store\n // will overwrite that with the correct byte. There is always another\n // store, whether a 4-byte store in this loop or a 1-byte store in the\n // next loop.\n while (n > loop_unroll_count) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 3), wuffs_base__load_u32le__no_bounds_c" +
+ "heck(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (1 * 3), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[1] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (2 * 3), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[2] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (3 * 3), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[3] * 4)));\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 3;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n\n s += 1 * 1;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__" +
+ "pixel_swizzler__xxx__index_binary_alpha__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len3 = dst.len / 3;\n size_t len = dst_len3 < src.len ? dst_len3 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n }\n uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[1] * 4));\n if (s1) {\n wuffs_base__store_u24le__no_bounds_check(d + (1 * 3), s1);\n }\n uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n " +
+ " ((size_t)s[2] * 4));\n if (s2) {\n wuffs_base__store_u24le__no_bounds_check(d + (2 * 3), s2);\n }\n uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[3] * 4));\n if (s3) {\n wuffs_base__store_u24le__no_bounds_check(d + (3 * 3), s3);\n }\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 3;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);\n }\n\n s += 1 * 1;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxx__y(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len3 =" +
+ " dst.len / 3;\n size_t len = dst_len3 < src.len ? dst_len3 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n uint8_t s0 = s[0];\n d[0] = s0;\n d[1] = s0;\n d[2] = s0;\n\n s += 1 * 1;\n d += 1 * 3;\n n -= 1;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__index__src(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len4 = dst.len / 4;\n size_t len = dst_len4 < src.len ? dst_len4 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (1 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[1] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (2 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_pale" +
+ "tte.ptr + ((size_t)s[2] * 4)));\n wuffs_base__store_u32le__no_bounds_check(\n d + (3 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[3] * 4)));\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count * 4;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(\n dst_palette.ptr + ((size_t)s[0] * 4)));\n\n s += 1 * 1;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over(\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (dst_palette.len != 1024) {\n return 0;\n }\n size_t dst_len4 = dst.len / 4;\n size_t len = dst_len4 < src.len ? dst_len4 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n const size_t loop_unroll_count = 4;\n\n while (n >= loop_unroll_count)" +
+ " {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);\n }\n uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[1] * 4));\n if (s1) {\n wuffs_base__store_u32le__no_bounds_check(d + (1 * 4), s1);\n }\n uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[2] * 4));\n if (s2) {\n wuffs_base__store_u32le__no_bounds_check(d + (2 * 4), s2);\n }\n uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[3] * 4));\n if (s3) {\n wuffs_base__store_u32le__no_bounds_check(d + (3 * 4), s3);\n }\n\n s += loop_unroll_count * 1;\n d += loop_unroll_count *" +
+ " 4;\n n -= loop_unroll_count;\n }\n\n while (n >= 1) {\n uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +\n ((size_t)s[0] * 4));\n if (s0) {\n wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);\n }\n\n s += 1 * 1;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__xxx(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t src_len3 = src.len / 3;\n size_t len = dst_len4 < src_len3 ? dst_len4 : src_len3;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4),\n 0xFF000000 | wuffs_base__load_u24le__no_bounds_check(s + (0 * 3)));\n\n s += 1 * 3;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n" +
+ "\nstatic uint64_t //\nwuffs_base__pixel_swizzler__xxxx__y(wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n size_t dst_len4 = dst.len / 4;\n size_t len = dst_len4 < src.len ? dst_len4 : src.len;\n uint8_t* d = dst.ptr;\n uint8_t* s = src.ptr;\n size_t n = len;\n\n // TODO: unroll.\n\n while (n >= 1) {\n wuffs_base__store_u32le__no_bounds_check(\n d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));\n\n s += 1 * 1;\n d += 1 * 4;\n n -= 1;\n }\n\n return len;\n}\n\n" +
+ "" +
+ "// --------\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__y(wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n return wuffs_base__pixel_swizzler__bgr_565__y;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n return wuffs_base__pixel_swizzler__xxx__y;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__BGRX:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n case WU" +
+ "FFS_BASE__PIXEL_FORMAT__RGBX:\n return wuffs_base__pixel_swizzler__xxxx__y;\n }\n return NULL;\n}\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(\n wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:\n if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=\n 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__copy_1_1;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n if (wuffs_base__pixel_swizzler__squash_bgr_565_888(dst_palette,\n " +
+ " src_palette) != 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__bgr_565__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=\n 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_pa" +
+ "lette) !=\n 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,\n src_palette) != 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n if (wuffs_base__pixel_swizzler__" +
+ "swap_rgbx_bgrx(dst_palette,\n src_palette) != 1024) {\n return NULL;\n }\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__xxxx__index__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;\n }\n return NULL;\n }\n return NULL;\n}\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__bgr(wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n return wuffs_base__pixel_swizzler__bgr_565__bgr;\n\n case WUFFS_BASE__PIXEL_FORMAT__B" +
+ "GR:\n return wuffs_base__pixel_swizzler__copy_3_3;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__BGRX:\n return wuffs_base__pixel_swizzler__xxxx__xxx;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__RGBX:\n // TODO.\n break;\n }\n return NULL;\n}\n\nstatic wuffs_base__pixel_swizzler__func //\nwuffs_base__pixel_swizzler__prepare__bgra_nonpremul(\n wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n switch (dst_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__BGR_565:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_b" +
+ "ase__pixel_swizzler__bgr_565__bgra_nonpremul__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swizzler__copy_4_4;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:\n switch (blend) {\n case WUFFS_BASE__PIXEL_BLEND__SRC:\n return wuffs_base__pixel_swiz" +
+ "zler__bgra_premul__bgra_nonpremul__src;\n case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:\n return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over;\n }\n return NULL;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__BGRX:\n // TODO.\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__RGB:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:\n case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:\n case WUFFS_BASE__PIXEL_FORMAT__RGBX:\n // TODO.\n break;\n }\n return NULL;\n}\n\n" +
+ "" +
+ "// --------\n\nwuffs_base__status //\nwuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,\n wuffs_base__pixel_format dst_format,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__pixel_format src_format,\n wuffs_base__slice_u8 src_palette,\n wuffs_base__pixel_blend blend) {\n if (!p) {\n return wuffs_base__make_status(wuffs_base__error__bad_receiver);\n }\n\n // TODO: support many more formats.\n\n wuffs_base__pixel_swizzler__func func = NULL;\n\n switch (src_format.repr) {\n case WUFFS_BASE__PIXEL_FORMAT__Y:\n func = wuffs_base__pixel_swizzler__prepare__y(p, dst_format, dst_palette,\n src_palette, blend);\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:\n func = wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(\n p, dst_format, dst_" +
+ "palette, src_palette, blend);\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGR:\n func = wuffs_base__pixel_swizzler__prepare__bgr(\n p, dst_format, dst_palette, src_palette, blend);\n break;\n\n case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:\n func = wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(\n p, dst_format, dst_palette, src_palette, blend);\n break;\n }\n\n p->private_impl.func = func;\n return wuffs_base__make_status(\n func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);\n}\n\nuint64_t //\nwuffs_base__pixel_swizzler__swizzle_interleaved(\n const wuffs_base__pixel_swizzler* p,\n wuffs_base__slice_u8 dst,\n wuffs_base__slice_u8 dst_palette,\n wuffs_base__slice_u8 src) {\n if (p && p->private_impl.func) {\n return (*p->private_impl.func)(dst, dst_palette, src);\n }\n return 0;\n}\n" +
""
const baseFundamentalPrivateH = "" +
diff --git a/internal/cgen/gen.go b/internal/cgen/gen.go
index 21a4f6d..b946828 100644
--- a/internal/cgen/gen.go
+++ b/internal/cgen/gen.go
@@ -77,6 +77,9 @@
{"base/image-impl.c", "baseImageImplC"},
{"base/strconv-impl.c", "baseStrConvImplC"},
+ {"base/f64conv-submodule.c", "baseF64ConvSubmoduleC"},
+ {"base/pixconv-submodule.c", "basePixConvSubmoduleC"},
+
{"base/fundamental-private.h", "baseFundamentalPrivateH"},
{"base/fundamental-public.h", "baseFundamentalPublicH"},
{"base/memory-private.h", "baseMemoryPrivateH"},
diff --git a/release/c/wuffs-unsupported-snapshot.c b/release/c/wuffs-unsupported-snapshot.c
index 72a4d01..b5161ef 100644
--- a/release/c/wuffs-unsupported-snapshot.c
+++ b/release/c/wuffs-unsupported-snapshot.c
@@ -8531,51 +8531,6 @@
// --------
-static uint64_t //
-wuffs_base__pixel_swizzler__squash_bgr_565_888(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 src) {
- size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
-
- size_t n = len4;
- while (n--) {
- uint32_t argb = wuffs_base__load_u32le__no_bounds_check(s);
- uint32_t b5 = 0x1F & (argb >> (8 - 5));
- uint32_t g6 = 0x3F & (argb >> (16 - 6));
- uint32_t r5 = 0x1F & (argb >> (24 - 5));
- uint32_t alpha = argb & 0xFF000000;
- wuffs_base__store_u32le__no_bounds_check(
- d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));
- s += 4;
- d += 4;
- }
- return len4 * 4;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 src) {
- size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
-
- size_t n = len4;
- while (n--) {
- uint8_t b0 = s[0];
- uint8_t b1 = s[1];
- uint8_t b2 = s[2];
- uint8_t b3 = s[3];
- d[0] = b2;
- d[1] = b1;
- d[2] = b0;
- d[3] = b3;
- s += 4;
- d += 4;
- }
- return len4 * 4;
-}
-
static inline uint32_t //
wuffs_base__swap_u32_argb_abgr(uint32_t u) {
uint32_t o = u & 0xFF00FF00;
@@ -8586,152 +8541,6 @@
// --------
-static inline uint32_t //
-wuffs_base__composite_nonpremul_nonpremul_u32_axxx(uint32_t dst_nonpremul,
- uint32_t src_nonpremul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
-
- // Convert dst from nonpremul to premul.
- dr = (dr * da) / 0xFFFF;
- dg = (dg * da) / 0xFFFF;
- db = (db * da) / 0xFFFF;
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert dst from premul to nonpremul.
- if (da != 0) {
- dr = (dr * 0xFFFF) / da;
- dg = (dg * 0xFFFF) / da;
- db = (db * 0xFFFF) / da;
- }
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-static inline uint32_t //
-wuffs_base__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,
- uint32_t src_premul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
-
- // Convert dst from nonpremul to premul.
- dr = (dr * da) / 0xFFFF;
- dg = (dg * da) / 0xFFFF;
- db = (db * da) / 0xFFFF;
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (premul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = sr + ((dr * ia) / 0xFFFF);
- dg = sg + ((dg * ia) / 0xFFFF);
- db = sb + ((db * ia) / 0xFFFF);
-
- // Convert dst from premul to nonpremul.
- if (da != 0) {
- dr = (dr * 0xFFFF) / da;
- dg = (dg * 0xFFFF) / da;
- db = (db * 0xFFFF) / da;
- }
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-static inline uint32_t //
-wuffs_base__composite_premul_nonpremul_u32_axxx(uint32_t dst_premul,
- uint32_t src_nonpremul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-static inline uint32_t //
-wuffs_base__composite_premul_premul_u32_axxx(uint32_t dst_premul,
- uint32_t src_premul) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
- uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
- uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
- uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
- uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
- uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
- uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
- uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (premul) over dst (premul).
- da = sa + ((da * ia) / 0xFFFF);
- dr = sr + ((dr * ia) / 0xFFFF);
- dg = sg + ((dg * ia) / 0xFFFF);
- db = sb + ((db * ia) / 0xFFFF);
-
- // Convert from 16-bit color to 8-bit color and combine the components.
- da >>= 8;
- dr >>= 8;
- dg >>= 8;
- db >>= 8;
- return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
-}
-
-// --------
-
wuffs_base__color_u32_argb_premul //
wuffs_base__pixel_buffer__color_u32_at(const wuffs_base__pixel_buffer* pb,
uint32_t x,
@@ -8956,988 +8765,6 @@
return (uint8_t)best_index;
}
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- return wuffs_base__slice_u8__copy_from_slice(dst, src);
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__copy_3_3(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t src_len3 = src.len / 3;
- size_t len = dst_len3 < src_len3 ? dst_len3 : src_len3;
- if (len > 0) {
- memmove(dst.ptr, src.ptr, len * 3);
- }
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__copy_4_4(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- if (len > 0) {
- memmove(dst.ptr, src.ptr, len * 4);
- }
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__bgr(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t src_len3 = src.len / 3;
- size_t len = dst_len2 < src_len3 ? dst_len2 : src_len3;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t b5 = s[0] >> 3;
- uint32_t g6 = s[1] >> 2;
- uint32_t r5 = s[2] >> 3;
- uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
-
- s += 1 * 3;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- wuffs_base__store_u16le__no_bounds_check(
- d + (0 * 2),
- wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
- wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
- wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)))));
-
- s += 1 * 4;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * ((uint32_t)s[3]);
- uint32_t sr = 0x101 * ((uint32_t)s[2]);
- uint32_t sg = 0x101 * ((uint32_t)s[1]);
- uint32_t sb = 0x101 * ((uint32_t)s[0]);
-
- // Convert from 565 color to 16-bit color.
- uint32_t old_rgb_565 = wuffs_base__load_u16le__no_bounds_check(d + (0 * 2));
- uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
- uint32_t dr = (0x8421 * old_r5) >> 4;
- uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
- uint32_t dg = (0x1041 * old_g6) >> 2;
- uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
- uint32_t db = (0x8421 * old_b5) >> 4;
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert from 16-bit color to 565 color and combine the components.
- uint32_t new_r5 = 0x1F & (dr >> 11);
- uint32_t new_g6 = 0x3F & (dg >> 10);
- uint32_t new_b5 = 0x1F & (db >> 11);
- uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2),
- (uint16_t)new_rgb_565);
-
- s += 1 * 4;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__y(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len2 = dst.len / 2;
- size_t len = dst_len2 < src.len ? dst_len2 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t y5 = s[0] >> 3;
- uint32_t y6 = s[0] >> 2;
- uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
-
- s += 1 * 1;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__index__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len2 = dst.len / 2;
- size_t len = dst_len2 < src.len ? dst_len2 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- wuffs_base__store_u16le__no_bounds_check(
- d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
- wuffs_base__store_u16le__no_bounds_check(
- d + (1 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[1] * 4)));
- wuffs_base__store_u16le__no_bounds_check(
- d + (2 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[2] * 4)));
- wuffs_base__store_u16le__no_bounds_check(
- d + (3 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[3] * 4)));
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 2;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- wuffs_base__store_u16le__no_bounds_check(
- d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
-
- s += 1 * 1;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len2 = dst.len / 2;
- size_t len = dst_len2 < src.len ? dst_len2 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)s0);
- }
-
- s += 1 * 1;
- d += 1 * 2;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t s0 =
- wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
- wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)));
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
-
- s += 1 * 4;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- // Convert from 8-bit color to 16-bit color.
- uint32_t sa = 0x101 * ((uint32_t)s[3]);
- uint32_t sr = 0x101 * ((uint32_t)s[2]);
- uint32_t sg = 0x101 * ((uint32_t)s[1]);
- uint32_t sb = 0x101 * ((uint32_t)s[0]);
- uint32_t dr = 0x101 * ((uint32_t)d[2]);
- uint32_t dg = 0x101 * ((uint32_t)d[1]);
- uint32_t db = 0x101 * ((uint32_t)d[0]);
-
- // Calculate the inverse of the src-alpha: how much of the dst to keep.
- uint32_t ia = 0xFFFF - sa;
-
- // Composite src (nonpremul) over dst (premul).
- dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
- dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
- db = ((sb * sa) + (db * ia)) / 0xFFFF;
-
- // Convert from 16-bit color to 8-bit color.
- d[0] = (uint8_t)(db >> 8);
- d[1] = (uint8_t)(dg >> 8);
- d[2] = (uint8_t)(dr >> 8);
-
- s += 1 * 4;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4),
- wuffs_base__composite_nonpremul_nonpremul_u32_axxx(d0, s0));
-
- s += 1 * 4;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4),
- wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));
-
- s += 1 * 4;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len4 = src.len / 4;
- size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), wuffs_base__composite_premul_nonpremul_u32_axxx(d0, s0));
-
- s += 1 * 4;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxx__index__src(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len3 = dst.len / 3;
- size_t len = dst_len3 < src.len ? dst_len3 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- // The comparison in the while condition is ">", not ">=", because with
- // ">=", the last 4-byte store could write past the end of the dst slice.
- //
- // Each 4-byte store writes one too many bytes, but a subsequent store
- // will overwrite that with the correct byte. There is always another
- // store, whether a 4-byte store in this loop or a 1-byte store in the
- // next loop.
- while (n > loop_unroll_count) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (1 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[1] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (2 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[2] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (3 * 3), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[3] * 4)));
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 3;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
-
- s += 1 * 1;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len3 = dst.len / 3;
- size_t len = dst_len3 < src.len ? dst_len3 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
- }
- uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[1] * 4));
- if (s1) {
- wuffs_base__store_u24le__no_bounds_check(d + (1 * 3), s1);
- }
- uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[2] * 4));
- if (s2) {
- wuffs_base__store_u24le__no_bounds_check(d + (2 * 3), s2);
- }
- uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[3] * 4));
- if (s3) {
- wuffs_base__store_u24le__no_bounds_check(d + (3 * 3), s3);
- }
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 3;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
- }
-
- s += 1 * 1;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxx__y(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len3 = dst.len / 3;
- size_t len = dst_len3 < src.len ? dst_len3 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- uint8_t s0 = s[0];
- d[0] = s0;
- d[1] = s0;
- d[2] = s0;
-
- s += 1 * 1;
- d += 1 * 3;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__index__src(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len4 = dst.len / 4;
- size_t len = dst_len4 < src.len ? dst_len4 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (1 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[1] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (2 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[2] * 4)));
- wuffs_base__store_u32le__no_bounds_check(
- d + (3 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[3] * 4)));
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 4;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
- dst_palette.ptr + ((size_t)s[0] * 4)));
-
- s += 1 * 1;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over(
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (dst_palette.len != 1024) {
- return 0;
- }
- size_t dst_len4 = dst.len / 4;
- size_t len = dst_len4 < src.len ? dst_len4 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- const size_t loop_unroll_count = 4;
-
- while (n >= loop_unroll_count) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
- }
- uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[1] * 4));
- if (s1) {
- wuffs_base__store_u32le__no_bounds_check(d + (1 * 4), s1);
- }
- uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[2] * 4));
- if (s2) {
- wuffs_base__store_u32le__no_bounds_check(d + (2 * 4), s2);
- }
- uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[3] * 4));
- if (s3) {
- wuffs_base__store_u32le__no_bounds_check(d + (3 * 4), s3);
- }
-
- s += loop_unroll_count * 1;
- d += loop_unroll_count * 4;
- n -= loop_unroll_count;
- }
-
- while (n >= 1) {
- uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
- ((size_t)s[0] * 4));
- if (s0) {
- wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
- }
-
- s += 1 * 1;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__xxx(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t src_len3 = src.len / 3;
- size_t len = dst_len4 < src_len3 ? dst_len4 : src_len3;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4),
- 0xFF000000 | wuffs_base__load_u24le__no_bounds_check(s + (0 * 3)));
-
- s += 1 * 3;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-static uint64_t //
-wuffs_base__pixel_swizzler__xxxx__y(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- size_t dst_len4 = dst.len / 4;
- size_t len = dst_len4 < src.len ? dst_len4 : src.len;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
-
- // TODO: unroll.
-
- while (n >= 1) {
- wuffs_base__store_u32le__no_bounds_check(
- d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));
-
- s += 1 * 1;
- d += 1 * 4;
- n -= 1;
- }
-
- return len;
-}
-
-// --------
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__y(wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- return wuffs_base__pixel_swizzler__bgr_565__y;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- return wuffs_base__pixel_swizzler__xxx__y;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__BGRX:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__RGBX:
- return wuffs_base__pixel_swizzler__xxxx__y;
- }
- return NULL;
-}
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
- wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
- if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
- 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__copy_1_1;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- if (wuffs_base__pixel_swizzler__squash_bgr_565_888(dst_palette,
- src_palette) != 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgr_565__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
- 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
- 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
- src_palette) != 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
- src_palette) != 1024) {
- return NULL;
- }
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__xxxx__index__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
- }
- return NULL;
- }
- return NULL;
-}
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__bgr(wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- return wuffs_base__pixel_swizzler__bgr_565__bgr;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- return wuffs_base__pixel_swizzler__copy_3_3;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__BGRX:
- return wuffs_base__pixel_swizzler__xxxx__xxx;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__RGBX:
- // TODO.
- break;
- }
- return NULL;
-}
-
-static wuffs_base__pixel_swizzler__func //
-wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
- wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- switch (dst_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__copy_4_4;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
- switch (blend) {
- case WUFFS_BASE__PIXEL_BLEND__SRC:
- return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src;
- case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
- return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over;
- }
- return NULL;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__BGRX:
- // TODO.
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__RGB:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
- case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
- case WUFFS_BASE__PIXEL_FORMAT__RGBX:
- // TODO.
- break;
- }
- return NULL;
-}
-
-// --------
-
-wuffs_base__status //
-wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,
- wuffs_base__pixel_format dst_format,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__pixel_format src_format,
- wuffs_base__slice_u8 src_palette,
- wuffs_base__pixel_blend blend) {
- if (!p) {
- return wuffs_base__make_status(wuffs_base__error__bad_receiver);
- }
-
- // TODO: support many more formats.
-
- wuffs_base__pixel_swizzler__func func = NULL;
-
- switch (src_format.repr) {
- case WUFFS_BASE__PIXEL_FORMAT__Y:
- func = wuffs_base__pixel_swizzler__prepare__y(p, dst_format, dst_palette,
- src_palette, blend);
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
- func = wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
- p, dst_format, dst_palette, src_palette, blend);
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGR:
- func = wuffs_base__pixel_swizzler__prepare__bgr(
- p, dst_format, dst_palette, src_palette, blend);
- break;
-
- case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
- func = wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
- p, dst_format, dst_palette, src_palette, blend);
- break;
- }
-
- p->private_impl.func = func;
- return wuffs_base__make_status(
- func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);
-}
-
-uint64_t //
-wuffs_base__pixel_swizzler__swizzle_interleaved(
- const wuffs_base__pixel_swizzler* p,
- wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 dst_palette,
- wuffs_base__slice_u8 src) {
- if (p && p->private_impl.func) {
- return (*p->private_impl.func)(dst, dst_palette, src);
- }
- return 0;
-}
-
// ---------------- String Conversions
// wuffs_base__parse_number__foo_digits entries are 0x00 for invalid digits,
@@ -10223,6 +9050,233 @@
} while (0);
}
+// ---------------- Hexadecimal
+
+size_t //
+wuffs_base__hexadecimal__decode2(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 src) {
+ size_t src_len2 = src.len / 2;
+ size_t len = dst.len < src_len2 ? dst.len : src_len2;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ while (n--) {
+ *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[0]] << 4) |
+ (wuffs_base__parse_number__hexadecimal_digits[s[1]] & 0x0F));
+ d += 1;
+ s += 2;
+ }
+
+ return len;
+}
+
+size_t //
+wuffs_base__hexadecimal__decode4(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 src) {
+ size_t src_len4 = src.len / 4;
+ size_t len = dst.len < src_len4 ? dst.len : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ while (n--) {
+ *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[2]] << 4) |
+ (wuffs_base__parse_number__hexadecimal_digits[s[3]] & 0x0F));
+ d += 1;
+ s += 4;
+ }
+
+ return len;
+}
+
+// ---------------- Unicode and UTF-8
+
+size_t //
+wuffs_base__utf_8__encode(wuffs_base__slice_u8 dst, uint32_t code_point) {
+ if (code_point <= 0x7F) {
+ if (dst.len >= 1) {
+ dst.ptr[0] = (uint8_t)(code_point);
+ return 1;
+ }
+
+ } else if (code_point <= 0x07FF) {
+ if (dst.len >= 2) {
+ dst.ptr[0] = (uint8_t)(0xC0 | ((code_point >> 6)));
+ dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
+ return 2;
+ }
+
+ } else if (code_point <= 0xFFFF) {
+ if ((dst.len >= 3) && ((code_point < 0xD800) || (0xDFFF < code_point))) {
+ dst.ptr[0] = (uint8_t)(0xE0 | ((code_point >> 12)));
+ dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));
+ dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
+ return 3;
+ }
+
+ } else if (code_point <= 0x10FFFF) {
+ if (dst.len >= 4) {
+ dst.ptr[0] = (uint8_t)(0xF0 | ((code_point >> 18)));
+ dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 12) & 0x3F));
+ dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));
+ dst.ptr[3] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
+ return 4;
+ }
+ }
+
+ return 0;
+}
+
+// wuffs_base__utf_8__byte_length_minus_1 is the byte length (minus 1) of a
+// UTF-8 encoded code point, based on the encoding's initial byte.
+// - 0x00 is 1-byte UTF-8 (ASCII).
+// - 0x01 is the start of 2-byte UTF-8.
+// - 0x02 is the start of 3-byte UTF-8.
+// - 0x03 is the start of 4-byte UTF-8.
+// - 0x40 is a UTF-8 tail byte.
+// - 0x80 is invalid UTF-8.
+//
+// RFC 3629 (UTF-8) gives this grammar for valid UTF-8:
+// UTF8-1 = %x00-7F
+// UTF8-2 = %xC2-DF UTF8-tail
+// UTF8-3 = %xE0 %xA0-BF UTF8-tail / %xE1-EC 2( UTF8-tail ) /
+// %xED %x80-9F UTF8-tail / %xEE-EF 2( UTF8-tail )
+// UTF8-4 = %xF0 %x90-BF 2( UTF8-tail ) / %xF1-F3 3( UTF8-tail ) /
+// %xF4 %x80-8F 2( UTF8-tail )
+// UTF8-tail = %x80-BF
+static const uint8_t wuffs_base__utf_8__byte_length_minus_1[256] = {
+ // 0 1 2 3 4 5 6 7
+ // 8 9 A B C D E F
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00 ..= 0x07.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x08 ..= 0x0F.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x10 ..= 0x17.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x18 ..= 0x1F.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x20 ..= 0x27.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x28 ..= 0x2F.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x30 ..= 0x37.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x38 ..= 0x3F.
+
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x40 ..= 0x47.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x48 ..= 0x4F.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x50 ..= 0x57.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x58 ..= 0x5F.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x60 ..= 0x67.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x68 ..= 0x6F.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x70 ..= 0x77.
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x78 ..= 0x7F.
+
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x80 ..= 0x87.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x88 ..= 0x8F.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x90 ..= 0x97.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x98 ..= 0x9F.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA0 ..= 0xA7.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA8 ..= 0xAF.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB0 ..= 0xB7.
+ 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB8 ..= 0xBF.
+
+ 0x80, 0x80, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC0 ..= 0xC7.
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC8 ..= 0xCF.
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD0 ..= 0xD7.
+ 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD8 ..= 0xDF.
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE0 ..= 0xE7.
+ 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE8 ..= 0xEF.
+ 0x03, 0x03, 0x03, 0x03, 0x03, 0x80, 0x80, 0x80, // 0xF0 ..= 0xF7.
+ 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 0xF8 ..= 0xFF.
+ // 0 1 2 3 4 5 6 7
+ // 8 9 A B C D E F
+};
+
+wuffs_base__utf_8__next__output //
+wuffs_base__utf_8__next(wuffs_base__slice_u8 s) {
+ if (s.len == 0) {
+ return wuffs_base__make_utf_8__next__output(0, 0);
+ }
+ uint32_t c = s.ptr[0];
+ switch (wuffs_base__utf_8__byte_length_minus_1[c & 0xFF]) {
+ case 0:
+ return wuffs_base__make_utf_8__next__output(c, 1);
+
+ case 1:
+ if (s.len < 2) {
+ break;
+ }
+ c = wuffs_base__load_u16le__no_bounds_check(s.ptr);
+ if ((c & 0xC000) != 0x8000) {
+ break;
+ }
+ c = (0x0007C0 & (c << 6)) | (0x00003F & (c >> 8));
+ return wuffs_base__make_utf_8__next__output(c, 2);
+
+ case 2:
+ if (s.len < 3) {
+ break;
+ }
+ c = wuffs_base__load_u24le__no_bounds_check(s.ptr);
+ if ((c & 0xC0C000) != 0x808000) {
+ break;
+ }
+ c = (0x00F000 & (c << 12)) | (0x000FC0 & (c >> 2)) |
+ (0x00003F & (c >> 16));
+ if ((c <= 0x07FF) || ((0xD800 <= c) && (c <= 0xDFFF))) {
+ break;
+ }
+ return wuffs_base__make_utf_8__next__output(c, 3);
+
+ case 3:
+ if (s.len < 4) {
+ break;
+ }
+ c = wuffs_base__load_u32le__no_bounds_check(s.ptr);
+ if ((c & 0xC0C0C000) != 0x80808000) {
+ break;
+ }
+ c = (0x1C0000 & (c << 18)) | (0x03F000 & (c << 4)) |
+ (0x000FC0 & (c >> 10)) | (0x00003F & (c >> 24));
+ if ((c <= 0xFFFF) || (0x110000 <= c)) {
+ break;
+ }
+ return wuffs_base__make_utf_8__next__output(c, 4);
+ }
+
+ return wuffs_base__make_utf_8__next__output(
+ WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, 1);
+}
+
+size_t //
+wuffs_base__utf_8__longest_valid_prefix(wuffs_base__slice_u8 s) {
+ // TODO: possibly optimize the all-ASCII case (4 or 8 bytes at a time).
+ //
+ // TODO: possibly optimize this by manually inlining the
+ // wuffs_base__utf_8__next calls.
+ size_t original_len = s.len;
+ while (s.len > 0) {
+ wuffs_base__utf_8__next__output o = wuffs_base__utf_8__next(s);
+ if ((o.code_point > 0x7F) && (o.byte_length == 1)) {
+ break;
+ }
+ s.ptr += o.byte_length;
+ s.len -= o.byte_length;
+ }
+ return original_len - s.len;
+}
+
+size_t //
+wuffs_base__ascii__longest_valid_prefix(wuffs_base__slice_u8 s) {
+ // TODO: possibly optimize this by checking 4 or 8 bytes at a time.
+ uint8_t* original_ptr = s.ptr;
+ uint8_t* p = s.ptr;
+ uint8_t* q = s.ptr + s.len;
+ for (; (p != q) && ((*p & 0x80) == 0); p++) {
+ }
+ return (size_t)(p - original_ptr);
+}
+
+#endif // !defined(WUFFS_CONFIG__MODULES) ||
+ // defined(WUFFS_CONFIG__MODULE__BASE)
+
+#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)
+
// ---------------- IEEE 754 Floating Point
#define WUFFS_BASE__PRIVATE_IMPLEMENTATION__HPD__DECIMAL_POINT__RANGE 1023
@@ -11472,226 +10526,1184 @@
} while (0);
}
-// ---------------- Hexadecimal
+#endif // !defined(WUFFS_CONFIG__MODULES) ||
+ // defined(WUFFS_CONFIG__MODULE__BASE)
-size_t //
-wuffs_base__hexadecimal__decode2(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 src) {
- size_t src_len2 = src.len / 2;
- size_t len = dst.len < src_len2 ? dst.len : src_len2;
- uint8_t* d = dst.ptr;
- uint8_t* s = src.ptr;
- size_t n = len;
+#if !defined(WUFFS_CONFIG__MODULES) || defined(WUFFS_CONFIG__MODULE__BASE)
- while (n--) {
- *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[0]] << 4) |
- (wuffs_base__parse_number__hexadecimal_digits[s[1]] & 0x0F));
- d += 1;
- s += 2;
+// ---------------- Pixel Swizzler
+
+static inline uint32_t //
+wuffs_base__composite_nonpremul_nonpremul_u32_axxx(uint32_t dst_nonpremul,
+ uint32_t src_nonpremul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
+
+ // Convert dst from nonpremul to premul.
+ dr = (dr * da) / 0xFFFF;
+ dg = (dg * da) / 0xFFFF;
+ db = (db * da) / 0xFFFF;
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert dst from premul to nonpremul.
+ if (da != 0) {
+ dr = (dr * 0xFFFF) / da;
+ dg = (dg * 0xFFFF) / da;
+ db = (db * 0xFFFF) / da;
}
- return len;
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
}
-size_t //
-wuffs_base__hexadecimal__decode4(wuffs_base__slice_u8 dst,
- wuffs_base__slice_u8 src) {
- size_t src_len4 = src.len / 4;
- size_t len = dst.len < src_len4 ? dst.len : src_len4;
+static inline uint32_t //
+wuffs_base__composite_nonpremul_premul_u32_axxx(uint32_t dst_nonpremul,
+ uint32_t src_premul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_nonpremul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_nonpremul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_nonpremul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_nonpremul >> 0));
+
+ // Convert dst from nonpremul to premul.
+ dr = (dr * da) / 0xFFFF;
+ dg = (dg * da) / 0xFFFF;
+ db = (db * da) / 0xFFFF;
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (premul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = sr + ((dr * ia) / 0xFFFF);
+ dg = sg + ((dg * ia) / 0xFFFF);
+ db = sb + ((db * ia) / 0xFFFF);
+
+ // Convert dst from premul to nonpremul.
+ if (da != 0) {
+ dr = (dr * 0xFFFF) / da;
+ dg = (dg * 0xFFFF) / da;
+ db = (db * 0xFFFF) / da;
+ }
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+static inline uint32_t //
+wuffs_base__composite_premul_nonpremul_u32_axxx(uint32_t dst_premul,
+ uint32_t src_nonpremul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_nonpremul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_nonpremul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_nonpremul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_nonpremul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+static inline uint32_t //
+wuffs_base__composite_premul_premul_u32_axxx(uint32_t dst_premul,
+ uint32_t src_premul) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * (0xFF & (src_premul >> 24));
+ uint32_t sr = 0x101 * (0xFF & (src_premul >> 16));
+ uint32_t sg = 0x101 * (0xFF & (src_premul >> 8));
+ uint32_t sb = 0x101 * (0xFF & (src_premul >> 0));
+ uint32_t da = 0x101 * (0xFF & (dst_premul >> 24));
+ uint32_t dr = 0x101 * (0xFF & (dst_premul >> 16));
+ uint32_t dg = 0x101 * (0xFF & (dst_premul >> 8));
+ uint32_t db = 0x101 * (0xFF & (dst_premul >> 0));
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (premul) over dst (premul).
+ da = sa + ((da * ia) / 0xFFFF);
+ dr = sr + ((dr * ia) / 0xFFFF);
+ dg = sg + ((dg * ia) / 0xFFFF);
+ db = sb + ((db * ia) / 0xFFFF);
+
+ // Convert from 16-bit color to 8-bit color and combine the components.
+ da >>= 8;
+ dr >>= 8;
+ dg >>= 8;
+ db >>= 8;
+ return (db << 0) | (dg << 8) | (dr << 16) | (da << 24);
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__squash_bgr_565_888(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 src) {
+ size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
uint8_t* d = dst.ptr;
uint8_t* s = src.ptr;
- size_t n = len;
+ size_t n = len4;
while (n--) {
- *d = (uint8_t)((wuffs_base__parse_number__hexadecimal_digits[s[2]] << 4) |
- (wuffs_base__parse_number__hexadecimal_digits[s[3]] & 0x0F));
- d += 1;
+ uint32_t argb = wuffs_base__load_u32le__no_bounds_check(s);
+ uint32_t b5 = 0x1F & (argb >> (8 - 5));
+ uint32_t g6 = 0x3F & (argb >> (16 - 6));
+ uint32_t r5 = 0x1F & (argb >> (24 - 5));
+ uint32_t alpha = argb & 0xFF000000;
+ wuffs_base__store_u32le__no_bounds_check(
+ d, alpha | (r5 << 11) | (g6 << 5) | (b5 << 0));
s += 4;
+ d += 4;
+ }
+ return len4 * 4;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__swap_rgbx_bgrx(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 src) {
+ size_t len4 = (dst.len < src.len ? dst.len : src.len) / 4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+
+ size_t n = len4;
+ while (n--) {
+ uint8_t b0 = s[0];
+ uint8_t b1 = s[1];
+ uint8_t b2 = s[2];
+ uint8_t b3 = s[3];
+ d[0] = b2;
+ d[1] = b1;
+ d[2] = b0;
+ d[3] = b3;
+ s += 4;
+ d += 4;
+ }
+ return len4 * 4;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__copy_1_1(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ return wuffs_base__slice_u8__copy_from_slice(dst, src);
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__copy_3_3(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t src_len3 = src.len / 3;
+ size_t len = dst_len3 < src_len3 ? dst_len3 : src_len3;
+ if (len > 0) {
+ memmove(dst.ptr, src.ptr, len * 3);
+ }
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__copy_4_4(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ if (len > 0) {
+ memmove(dst.ptr, src.ptr, len * 4);
+ }
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__bgr(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t src_len3 = src.len / 3;
+ size_t len = dst_len2 < src_len3 ? dst_len2 : src_len3;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t b5 = s[0] >> 3;
+ uint32_t g6 = s[1] >> 2;
+ uint32_t r5 = s[2] >> 3;
+ uint32_t rgb_565 = (r5 << 11) | (g6 << 5) | (b5 << 0);
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
+
+ s += 1 * 3;
+ d += 1 * 2;
+ n -= 1;
}
return len;
}
-// ---------------- Unicode and UTF-8
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
-size_t //
-wuffs_base__utf_8__encode(wuffs_base__slice_u8 dst, uint32_t code_point) {
- if (code_point <= 0x7F) {
- if (dst.len >= 1) {
- dst.ptr[0] = (uint8_t)(code_point);
- return 1;
- }
+ // TODO: unroll.
- } else if (code_point <= 0x07FF) {
- if (dst.len >= 2) {
- dst.ptr[0] = (uint8_t)(0xC0 | ((code_point >> 6)));
- dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
- return 2;
- }
+ while (n >= 1) {
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (0 * 2),
+ wuffs_base__color_u32_argb_premul__as__color_u16_rgb_565(
+ wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
+ wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)))));
- } else if (code_point <= 0xFFFF) {
- if ((dst.len >= 3) && ((code_point < 0xD800) || (0xDFFF < code_point))) {
- dst.ptr[0] = (uint8_t)(0xE0 | ((code_point >> 12)));
- dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));
- dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
- return 3;
- }
-
- } else if (code_point <= 0x10FFFF) {
- if (dst.len >= 4) {
- dst.ptr[0] = (uint8_t)(0xF0 | ((code_point >> 18)));
- dst.ptr[1] = (uint8_t)(0x80 | ((code_point >> 12) & 0x3F));
- dst.ptr[2] = (uint8_t)(0x80 | ((code_point >> 6) & 0x3F));
- dst.ptr[3] = (uint8_t)(0x80 | ((code_point >> 0) & 0x3F));
- return 4;
- }
+ s += 1 * 4;
+ d += 1 * 2;
+ n -= 1;
}
- return 0;
+ return len;
}
-// wuffs_base__utf_8__byte_length_minus_1 is the byte length (minus 1) of a
-// UTF-8 encoded code point, based on the encoding's initial byte.
-// - 0x00 is 1-byte UTF-8 (ASCII).
-// - 0x01 is the start of 2-byte UTF-8.
-// - 0x02 is the start of 3-byte UTF-8.
-// - 0x03 is the start of 4-byte UTF-8.
-// - 0x40 is a UTF-8 tail byte.
-// - 0x80 is invalid UTF-8.
-//
-// RFC 3629 (UTF-8) gives this grammar for valid UTF-8:
-// UTF8-1 = %x00-7F
-// UTF8-2 = %xC2-DF UTF8-tail
-// UTF8-3 = %xE0 %xA0-BF UTF8-tail / %xE1-EC 2( UTF8-tail ) /
-// %xED %x80-9F UTF8-tail / %xEE-EF 2( UTF8-tail )
-// UTF8-4 = %xF0 %x90-BF 2( UTF8-tail ) / %xF1-F3 3( UTF8-tail ) /
-// %xF4 %x80-8F 2( UTF8-tail )
-// UTF8-tail = %x80-BF
-static const uint8_t wuffs_base__utf_8__byte_length_minus_1[256] = {
- // 0 1 2 3 4 5 6 7
- // 8 9 A B C D E F
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00 ..= 0x07.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x08 ..= 0x0F.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x10 ..= 0x17.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x18 ..= 0x1F.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x20 ..= 0x27.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x28 ..= 0x2F.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x30 ..= 0x37.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x38 ..= 0x3F.
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len2 < src_len4 ? dst_len2 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x40 ..= 0x47.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x48 ..= 0x4F.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x50 ..= 0x57.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x58 ..= 0x5F.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x60 ..= 0x67.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x68 ..= 0x6F.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x70 ..= 0x77.
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x78 ..= 0x7F.
+ // TODO: unroll.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x80 ..= 0x87.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x88 ..= 0x8F.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x90 ..= 0x97.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0x98 ..= 0x9F.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA0 ..= 0xA7.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xA8 ..= 0xAF.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB0 ..= 0xB7.
- 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, // 0xB8 ..= 0xBF.
+ while (n >= 1) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * ((uint32_t)s[3]);
+ uint32_t sr = 0x101 * ((uint32_t)s[2]);
+ uint32_t sg = 0x101 * ((uint32_t)s[1]);
+ uint32_t sb = 0x101 * ((uint32_t)s[0]);
- 0x80, 0x80, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC0 ..= 0xC7.
- 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xC8 ..= 0xCF.
- 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD0 ..= 0xD7.
- 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, // 0xD8 ..= 0xDF.
- 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE0 ..= 0xE7.
- 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, // 0xE8 ..= 0xEF.
- 0x03, 0x03, 0x03, 0x03, 0x03, 0x80, 0x80, 0x80, // 0xF0 ..= 0xF7.
- 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, // 0xF8 ..= 0xFF.
- // 0 1 2 3 4 5 6 7
- // 8 9 A B C D E F
-};
+ // Convert from 565 color to 16-bit color.
+ uint32_t old_rgb_565 = wuffs_base__load_u16le__no_bounds_check(d + (0 * 2));
+ uint32_t old_r5 = 0x1F & (old_rgb_565 >> 11);
+ uint32_t dr = (0x8421 * old_r5) >> 4;
+ uint32_t old_g6 = 0x3F & (old_rgb_565 >> 5);
+ uint32_t dg = (0x1041 * old_g6) >> 2;
+ uint32_t old_b5 = 0x1F & (old_rgb_565 >> 0);
+ uint32_t db = (0x8421 * old_b5) >> 4;
-wuffs_base__utf_8__next__output //
-wuffs_base__utf_8__next(wuffs_base__slice_u8 s) {
- if (s.len == 0) {
- return wuffs_base__make_utf_8__next__output(0, 0);
- }
- uint32_t c = s.ptr[0];
- switch (wuffs_base__utf_8__byte_length_minus_1[c & 0xFF]) {
- case 0:
- return wuffs_base__make_utf_8__next__output(c, 1);
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
- case 1:
- if (s.len < 2) {
- break;
- }
- c = wuffs_base__load_u16le__no_bounds_check(s.ptr);
- if ((c & 0xC000) != 0x8000) {
- break;
- }
- c = (0x0007C0 & (c << 6)) | (0x00003F & (c >> 8));
- return wuffs_base__make_utf_8__next__output(c, 2);
+ // Composite src (nonpremul) over dst (premul).
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
- case 2:
- if (s.len < 3) {
- break;
- }
- c = wuffs_base__load_u24le__no_bounds_check(s.ptr);
- if ((c & 0xC0C000) != 0x808000) {
- break;
- }
- c = (0x00F000 & (c << 12)) | (0x000FC0 & (c >> 2)) |
- (0x00003F & (c >> 16));
- if ((c <= 0x07FF) || ((0xD800 <= c) && (c <= 0xDFFF))) {
- break;
- }
- return wuffs_base__make_utf_8__next__output(c, 3);
+ // Convert from 16-bit color to 565 color and combine the components.
+ uint32_t new_r5 = 0x1F & (dr >> 11);
+ uint32_t new_g6 = 0x3F & (dg >> 10);
+ uint32_t new_b5 = 0x1F & (db >> 11);
+ uint32_t new_rgb_565 = (new_r5 << 11) | (new_g6 << 5) | (new_b5 << 0);
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2),
+ (uint16_t)new_rgb_565);
- case 3:
- if (s.len < 4) {
- break;
- }
- c = wuffs_base__load_u32le__no_bounds_check(s.ptr);
- if ((c & 0xC0C0C000) != 0x80808000) {
- break;
- }
- c = (0x1C0000 & (c << 18)) | (0x03F000 & (c << 4)) |
- (0x000FC0 & (c >> 10)) | (0x00003F & (c >> 24));
- if ((c <= 0xFFFF) || (0x110000 <= c)) {
- break;
- }
- return wuffs_base__make_utf_8__next__output(c, 4);
+ s += 1 * 4;
+ d += 1 * 2;
+ n -= 1;
}
- return wuffs_base__make_utf_8__next__output(
- WUFFS_BASE__UNICODE_REPLACEMENT_CHARACTER, 1);
+ return len;
}
-size_t //
-wuffs_base__utf_8__longest_valid_prefix(wuffs_base__slice_u8 s) {
- // TODO: possibly optimize the all-ASCII case (4 or 8 bytes at a time).
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__y(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len2 = dst.len / 2;
+ size_t len = dst_len2 < src.len ? dst_len2 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t y5 = s[0] >> 3;
+ uint32_t y6 = s[0] >> 2;
+ uint32_t rgb_565 = (y5 << 11) | (y6 << 5) | (y5 << 0);
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)rgb_565);
+
+ s += 1 * 1;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__index__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len2 = dst.len / 2;
+ size_t len = dst_len2 < src.len ? dst_len2 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (1 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[1] * 4)));
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (2 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[2] * 4)));
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (3 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[3] * 4)));
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 2;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ wuffs_base__store_u16le__no_bounds_check(
+ d + (0 * 2), wuffs_base__load_u16le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+
+ s += 1 * 1;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len2 = dst.len / 2;
+ size_t len = dst_len2 < src.len ? dst_len2 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u16le__no_bounds_check(d + (0 * 2), (uint16_t)s0);
+ }
+
+ s += 1 * 1;
+ d += 1 * 2;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t s0 =
+ wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(
+ wuffs_base__load_u32le__no_bounds_check(s + (0 * 4)));
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+
+ s += 1 * 4;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len3 < src_len4 ? dst_len3 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ // Convert from 8-bit color to 16-bit color.
+ uint32_t sa = 0x101 * ((uint32_t)s[3]);
+ uint32_t sr = 0x101 * ((uint32_t)s[2]);
+ uint32_t sg = 0x101 * ((uint32_t)s[1]);
+ uint32_t sb = 0x101 * ((uint32_t)s[0]);
+ uint32_t dr = 0x101 * ((uint32_t)d[2]);
+ uint32_t dg = 0x101 * ((uint32_t)d[1]);
+ uint32_t db = 0x101 * ((uint32_t)d[0]);
+
+ // Calculate the inverse of the src-alpha: how much of the dst to keep.
+ uint32_t ia = 0xFFFF - sa;
+
+ // Composite src (nonpremul) over dst (premul).
+ dr = ((sr * sa) + (dr * ia)) / 0xFFFF;
+ dg = ((sg * sa) + (dg * ia)) / 0xFFFF;
+ db = ((sb * sa) + (db * ia)) / 0xFFFF;
+
+ // Convert from 16-bit color to 8-bit color.
+ d[0] = (uint8_t)(db >> 8);
+ d[1] = (uint8_t)(dg >> 8);
+ d[2] = (uint8_t)(dr >> 8);
+
+ s += 1 * 4;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4),
+ wuffs_base__composite_nonpremul_nonpremul_u32_axxx(d0, s0));
+
+ s += 1 * 4;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4),
+ wuffs_base__color_u32_argb_nonpremul__as__color_u32_argb_premul(s0));
+
+ s += 1 * 4;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len4 = src.len / 4;
+ size_t len = dst_len4 < src_len4 ? dst_len4 : src_len4;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint32_t d0 = wuffs_base__load_u32le__no_bounds_check(d + (0 * 4));
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(s + (0 * 4));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), wuffs_base__composite_premul_nonpremul_u32_axxx(d0, s0));
+
+ s += 1 * 4;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxx__index__src(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len3 = dst.len / 3;
+ size_t len = dst_len3 < src.len ? dst_len3 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ // The comparison in the while condition is ">", not ">=", because with
+ // ">=", the last 4-byte store could write past the end of the dst slice.
//
- // TODO: possibly optimize this by manually inlining the
- // wuffs_base__utf_8__next calls.
- size_t original_len = s.len;
- while (s.len > 0) {
- wuffs_base__utf_8__next__output o = wuffs_base__utf_8__next(s);
- if ((o.code_point > 0x7F) && (o.byte_length == 1)) {
- break;
- }
- s.ptr += o.byte_length;
- s.len -= o.byte_length;
+ // Each 4-byte store writes one too many bytes, but a subsequent store
+ // will overwrite that with the correct byte. There is always another
+ // store, whether a 4-byte store in this loop or a 1-byte store in the
+ // next loop.
+ while (n > loop_unroll_count) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (1 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[1] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (2 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[2] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (3 * 3), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[3] * 4)));
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 3;
+ n -= loop_unroll_count;
}
- return original_len - s.len;
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+
+ s += 1 * 1;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
}
-size_t //
-wuffs_base__ascii__longest_valid_prefix(wuffs_base__slice_u8 s) {
- // TODO: possibly optimize this by checking 4 or 8 bytes at a time.
- uint8_t* original_ptr = s.ptr;
- uint8_t* p = s.ptr;
- uint8_t* q = s.ptr + s.len;
- for (; (p != q) && ((*p & 0x80) == 0); p++) {
+static uint64_t //
+wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
}
- return (size_t)(p - original_ptr);
+ size_t dst_len3 = dst.len / 3;
+ size_t len = dst_len3 < src.len ? dst_len3 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+ }
+ uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[1] * 4));
+ if (s1) {
+ wuffs_base__store_u24le__no_bounds_check(d + (1 * 3), s1);
+ }
+ uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[2] * 4));
+ if (s2) {
+ wuffs_base__store_u24le__no_bounds_check(d + (2 * 3), s2);
+ }
+ uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[3] * 4));
+ if (s3) {
+ wuffs_base__store_u24le__no_bounds_check(d + (3 * 3), s3);
+ }
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 3;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u24le__no_bounds_check(d + (0 * 3), s0);
+ }
+
+ s += 1 * 1;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxx__y(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len3 = dst.len / 3;
+ size_t len = dst_len3 < src.len ? dst_len3 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ uint8_t s0 = s[0];
+ d[0] = s0;
+ d[1] = s0;
+ d[2] = s0;
+
+ s += 1 * 1;
+ d += 1 * 3;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__index__src(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len4 = dst.len / 4;
+ size_t len = dst_len4 < src.len ? dst_len4 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (1 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[1] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (2 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[2] * 4)));
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (3 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[3] * 4)));
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 4;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), wuffs_base__load_u32le__no_bounds_check(
+ dst_palette.ptr + ((size_t)s[0] * 4)));
+
+ s += 1 * 1;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over(
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (dst_palette.len != 1024) {
+ return 0;
+ }
+ size_t dst_len4 = dst.len / 4;
+ size_t len = dst_len4 < src.len ? dst_len4 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ const size_t loop_unroll_count = 4;
+
+ while (n >= loop_unroll_count) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
+ }
+ uint32_t s1 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[1] * 4));
+ if (s1) {
+ wuffs_base__store_u32le__no_bounds_check(d + (1 * 4), s1);
+ }
+ uint32_t s2 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[2] * 4));
+ if (s2) {
+ wuffs_base__store_u32le__no_bounds_check(d + (2 * 4), s2);
+ }
+ uint32_t s3 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[3] * 4));
+ if (s3) {
+ wuffs_base__store_u32le__no_bounds_check(d + (3 * 4), s3);
+ }
+
+ s += loop_unroll_count * 1;
+ d += loop_unroll_count * 4;
+ n -= loop_unroll_count;
+ }
+
+ while (n >= 1) {
+ uint32_t s0 = wuffs_base__load_u32le__no_bounds_check(dst_palette.ptr +
+ ((size_t)s[0] * 4));
+ if (s0) {
+ wuffs_base__store_u32le__no_bounds_check(d + (0 * 4), s0);
+ }
+
+ s += 1 * 1;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__xxx(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t src_len3 = src.len / 3;
+ size_t len = dst_len4 < src_len3 ? dst_len4 : src_len3;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4),
+ 0xFF000000 | wuffs_base__load_u24le__no_bounds_check(s + (0 * 3)));
+
+ s += 1 * 3;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+static uint64_t //
+wuffs_base__pixel_swizzler__xxxx__y(wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ size_t dst_len4 = dst.len / 4;
+ size_t len = dst_len4 < src.len ? dst_len4 : src.len;
+ uint8_t* d = dst.ptr;
+ uint8_t* s = src.ptr;
+ size_t n = len;
+
+ // TODO: unroll.
+
+ while (n >= 1) {
+ wuffs_base__store_u32le__no_bounds_check(
+ d + (0 * 4), 0xFF000000 | (0x010101 * (uint32_t)s[0]));
+
+ s += 1 * 1;
+ d += 1 * 4;
+ n -= 1;
+ }
+
+ return len;
+}
+
+// --------
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__y(wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ return wuffs_base__pixel_swizzler__bgr_565__y;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ return wuffs_base__pixel_swizzler__xxx__y;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRX:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBX:
+ return wuffs_base__pixel_swizzler__xxxx__y;
+ }
+ return NULL;
+}
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
+ wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
+ if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
+ 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__copy_1_1;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ if (wuffs_base__pixel_swizzler__squash_bgr_565_888(dst_palette,
+ src_palette) != 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgr_565__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgr_565__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
+ 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ if (wuffs_base__slice_u8__copy_from_slice(dst_palette, src_palette) !=
+ 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
+ src_palette) != 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ if (wuffs_base__pixel_swizzler__swap_rgbx_bgrx(dst_palette,
+ src_palette) != 1024) {
+ return NULL;
+ }
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__xxxx__index__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__xxxx__index_binary_alpha__src_over;
+ }
+ return NULL;
+ }
+ return NULL;
+}
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__bgr(wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ return wuffs_base__pixel_swizzler__bgr_565__bgr;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ return wuffs_base__pixel_swizzler__copy_3_3;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRX:
+ return wuffs_base__pixel_swizzler__xxxx__xxx;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBX:
+ // TODO.
+ break;
+ }
+ return NULL;
+}
+
+static wuffs_base__pixel_swizzler__func //
+wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
+ wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ switch (dst_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__BGR_565:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgr_565__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgr__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__copy_4_4;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgra_nonpremul__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_PREMUL:
+ switch (blend) {
+ case WUFFS_BASE__PIXEL_BLEND__SRC:
+ return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src;
+ case WUFFS_BASE__PIXEL_BLEND__SRC_OVER:
+ return wuffs_base__pixel_swizzler__bgra_premul__bgra_nonpremul__src_over;
+ }
+ return NULL;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__BGRX:
+ // TODO.
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__RGB:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_NONPREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_PREMUL:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBA_BINARY:
+ case WUFFS_BASE__PIXEL_FORMAT__RGBX:
+ // TODO.
+ break;
+ }
+ return NULL;
+}
+
+// --------
+
+wuffs_base__status //
+wuffs_base__pixel_swizzler__prepare(wuffs_base__pixel_swizzler* p,
+ wuffs_base__pixel_format dst_format,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__pixel_format src_format,
+ wuffs_base__slice_u8 src_palette,
+ wuffs_base__pixel_blend blend) {
+ if (!p) {
+ return wuffs_base__make_status(wuffs_base__error__bad_receiver);
+ }
+
+ // TODO: support many more formats.
+
+ wuffs_base__pixel_swizzler__func func = NULL;
+
+ switch (src_format.repr) {
+ case WUFFS_BASE__PIXEL_FORMAT__Y:
+ func = wuffs_base__pixel_swizzler__prepare__y(p, dst_format, dst_palette,
+ src_palette, blend);
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__INDEXED__BGRA_BINARY:
+ func = wuffs_base__pixel_swizzler__prepare__indexed__bgra_binary(
+ p, dst_format, dst_palette, src_palette, blend);
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGR:
+ func = wuffs_base__pixel_swizzler__prepare__bgr(
+ p, dst_format, dst_palette, src_palette, blend);
+ break;
+
+ case WUFFS_BASE__PIXEL_FORMAT__BGRA_NONPREMUL:
+ func = wuffs_base__pixel_swizzler__prepare__bgra_nonpremul(
+ p, dst_format, dst_palette, src_palette, blend);
+ break;
+ }
+
+ p->private_impl.func = func;
+ return wuffs_base__make_status(
+ func ? NULL : wuffs_base__error__unsupported_pixel_swizzler_option);
+}
+
+uint64_t //
+wuffs_base__pixel_swizzler__swizzle_interleaved(
+ const wuffs_base__pixel_swizzler* p,
+ wuffs_base__slice_u8 dst,
+ wuffs_base__slice_u8 dst_palette,
+ wuffs_base__slice_u8 src) {
+ if (p && p->private_impl.func) {
+ return (*p->private_impl.func)(dst, dst_palette, src);
+ }
+ return 0;
}
#endif // !defined(WUFFS_CONFIG__MODULES) ||
