| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "tests/Test.h" |
| |
| #include "include/core/SkTypes.h" |
| #include "include/private/SkFixed.h" |
| #include "src/core/SkBitmapProcState.h" |
| #include "src/opts/SkBitmapProcState_opts.h" |
| |
| #include <cstddef> |
| #include <cstdint> |
| #include <string> |
| |
| int highBits(uint32_t rv) { |
| return (rv >> 18) & ((1 << 14) - 1); |
| } |
| |
| int middleBits(uint32_t rv) { |
| return (rv >> 14) & ((1 << 4) - 1); |
| } |
| |
| int lowBits(uint32_t rv) { |
| return rv & ((1 << 14) - 1); |
| } |
| |
| DEF_TEST(MatrixProcs_pack_clamp, r) { |
| struct TestCase { |
| std::string name; |
| SkFixed input; |
| unsigned max; |
| uint32_t expectedOutput; |
| }; |
| // The input values are somewhat arbitrary, inspired by real-world values |
| // with some edge cases added as well. |
| TestCase tests[] = { |
| // Negative values keep the fractional part out of convenience, but it is effectively |
| // ignored later. |
| {"-2.100 => {0x00, 0xe, 0x00}", SkFloatToFixed(-2.100f), 63, 0x38000}, |
| {"-1.900 => {0x00, 0x1, 0x00}", SkFloatToFixed(-1.900f), 63, 0x04000}, |
| {"-0.500 => {0x00, 0x8, 0x00}", SkFloatToFixed(-0.500f), 63, 0x20000}, |
| {"0.0000 => {0x00, 0x0, 0x01}", SkFloatToFixed(0.0000f), 63, 0x000001}, |
| {"0.0416 => {0x00, 0x0, 0x01}", SkFloatToFixed(0.0416f), 63, 0x000001}, |
| {"1.8583 => {0x01, 0xd, 0x02}", SkFloatToFixed(1.8583f), 63, 0x074002}, |
| {"3.6749 => {0x03, 0xa, 0x04}", SkFloatToFixed(3.6749f), 63, 0x0e8004}, |
| {"5.4916 => {0x05, 0x7, 0x06}", SkFloatToFixed(5.4916f), 63, 0x15c006}, |
| {"7.3083 => {0x07, 0x4, 0x08}", SkFloatToFixed(7.3083f), 63, 0x1d0008}, |
| {"9.0000 => {0x09, 0x0, 0x0a}", SkFloatToFixed(9.0000f), 63, 0x24000a}, |
| {"50.000 => {0x32, 0x0, 0x33}", SkFloatToFixed(50.000f), 63, 0xc80033}, |
| {"50.875 => {0x32, 0xe, 0x33}", SkFloatToFixed(50.875f), 63, 0xcb8033}, |
| {"62.123 => {0x3e, 0x1, 0x3f}", SkFloatToFixed(62.123f), 63, 0xf8403f}, |
| {"62.999 => {0x3e, 0xf, 0x3f}", SkFloatToFixed(62.999f), 63, 0xfbc03f}, |
| {"63.000 => {0x3f, 0x0, 0x3f}", SkFloatToFixed(63.000f), 63, 0xfc003f}, |
| // Similarly, overflow keeps the fractional part. |
| {"64.500 => {0x3f, 0x8, 0x3f}", SkFloatToFixed(64.500f), 63, 0xfe003f}, |
| {"127.20 => {0x3f, 0x3, 0x3f}", SkFloatToFixed(127.20f), 63, 0xfcc03f}, |
| // Maximum has changed from 63 to 256 |
| {"64.510 => {0x40, 0x8, 0x41}", SkFloatToFixed(64.510f), 256, 0x1020041}, |
| {"127.21 => {0x7f, 0x3, 0x80}", SkFloatToFixed(127.21f), 256, 0x1fcc080}, |
| {"256.77 => {0x100, 0xc, 0x100}", SkFloatToFixed(256.77f), 256, 0x4030100}, |
| {"10000. => {0x100, 0x0, 0x100}", SkFloatToFixed(10000.f), 256, 0x4000100}, |
| }; |
| |
| constexpr size_t NUM_TESTS = sizeof(tests) / sizeof(TestCase); |
| |
| for (size_t i = 0; i < NUM_TESTS; i++) { |
| TestCase tc = tests[i]; |
| uint32_t rv = sktests::pack_clamp(tc.input, tc.max); |
| uint32_t exp = tc.expectedOutput; |
| |
| REPORTER_ASSERT(r, rv == tc.expectedOutput, |
| "%s | %x != %x | {%x, %x, %x} != {%x, %x, %x}\n", |
| tc.name.c_str(), rv, exp, |
| highBits(rv), middleBits(rv), lowBits(rv), |
| highBits(exp), middleBits(exp), lowBits(exp)); |
| } |
| } |
| |
| DEF_TEST(MatrixProcs_pack_clamp_out_of_range, r) { |
| // See https://crbug.com/1357122 |
| struct TestCase { |
| std::string name; |
| SkFixed input; |
| unsigned max; |
| uint32_t expectedOutput; |
| }; |
| |
| // None of these should crash or cause UBSAN errors, although if they were used in drawing, |
| // they might be incorrect due to packing 16 bits of SkFixed into 14 bits of space. |
| static constexpr unsigned MAX_PACKED_VALUE = (1 << 14) - 1; |
| TestCase tests[] = { |
| {"16000.42=>{0xff, 6, 0xff}", SkFloatToFixed(16000.42f), 255, 0x3fd80ff}, |
| {"17000.42=>{0xff, 6, 0xff}", SkFloatToFixed(17000.42f), 255, 0x3fd80ff}, |
| {"18000.42=>{0xff, 6, 0xff}", SkFloatToFixed(18000.42f), 255, 0x3fd80ff}, |
| |
| {"16000.42=>{0x3e80, 6, 0x3e81}", SkFloatToFixed(16000.42f), MAX_PACKED_VALUE, 0xfa01be81}, |
| {"16382.00=>{0x3ffe, 0, 0x3fff}", SkFloatToFixed(16382.00f), MAX_PACKED_VALUE, 0xfff83fff}, |
| {"16382.51=>{0x3ffe, 8, 0x3fff}}", SkFloatToFixed(16382.51f), MAX_PACKED_VALUE, 0xfffa3fff}, |
| {"17000.42=>{0x3fff, 6, 0x3fff}", SkFloatToFixed(17000.42f), MAX_PACKED_VALUE, 0xfffdbfff}, |
| {"18000.42=>{0x3fff, 6, 0x3fff}", SkFloatToFixed(18000.42f), MAX_PACKED_VALUE, 0xfffdbfff}, |
| // Adding 1 to this would overflow and cause an UBSAN issue, if it were not suppressed. |
| // We suppress the warning and it wraps around. |
| {"32767.90=>{0x3fff, e, 0x0}", SkFloatToFixed(32767.90f), MAX_PACKED_VALUE, 0xffff8000}, |
| }; |
| |
| constexpr size_t NUM_TESTS = sizeof(tests) / sizeof(TestCase); |
| |
| for (size_t i = 0; i < NUM_TESTS; i++) { |
| TestCase tc = tests[i]; |
| uint32_t rv = sktests::pack_clamp(tc.input, tc.max); |
| uint32_t exp = tc.expectedOutput; |
| |
| REPORTER_ASSERT(r, rv == tc.expectedOutput, |
| "%s | %x != %x | {%x, %x, %x} != {%x, %x, %x}\n", |
| tc.name.c_str(), rv, exp, |
| highBits(rv), middleBits(rv), lowBits(rv), |
| highBits(exp), middleBits(exp), lowBits(exp)); |
| } |
| } |
| |
| DEF_TEST(MatrixProcs_pack_repeat, r) { |
| struct TestCase { |
| std::string name; |
| SkFixed input; |
| unsigned max; |
| uint32_t expectedOutput; |
| size_t width; |
| }; |
| TestCase tests[] = { |
| // negative values wrap back around |
| {"-0.300 => {0x2c, 0xc, 0x2d}", SkFloatToFixed(-0.300f), 63, 0xb3002d, 63}, |
| {"-0.200 => {0x33, 0x3, 0x34}", SkFloatToFixed(-0.200f), 63, 0xccc034, 63}, |
| {"-0.100 => {0x39, 0x9, 0x3a}", SkFloatToFixed(-0.100f), 63, 0xe6403a, 63}, |
| // The domain of the function is primarily [0.0, 1.0) |
| {"0.0000 => {0x00, 0x0, 0x01}", SkFloatToFixed(0.0000f), 63, 0x000001, 63}, |
| {"0.1000 => {0x06, 0x6, 0x07}", SkFloatToFixed(0.1000f), 63, 0x198007, 63}, |
| {"0.1234 => {0x07, 0xe, 0x08}", SkFloatToFixed(0.1234f), 63, 0x1f8008, 63}, |
| {"0.2000 => {0x0c, 0xc, 0x0d}", SkFloatToFixed(0.2000f), 63, 0x33000d, 63}, |
| {"0.3000 => {0x13, 0x3, 0x14}", SkFloatToFixed(0.3000f), 63, 0x4cc014, 63}, |
| {"0.4000 => {0x19, 0x9, 0x1a}", SkFloatToFixed(0.4000f), 63, 0x66401a, 63}, |
| {"0.5000 => {0x20, 0x0, 0x21}", SkFloatToFixed(0.5000f), 63, 0x800021, 63}, |
| {"0.5678 => {0x24, 0x5, 0x25}", SkFloatToFixed(0.5678f), 63, 0x914025, 63}, |
| {"0.6000 => {0x26, 0x6, 0x27}", SkFloatToFixed(0.6000f), 63, 0x998027, 63}, |
| {"0.7000 => {0x2c, 0xc, 0x2d}", SkFloatToFixed(0.7000f), 63, 0xb3002d, 63}, |
| {"0.8000 => {0x33, 0x3, 0x34}", SkFloatToFixed(0.8000f), 63, 0xccc034, 63}, |
| {"0.9000 => {0x39, 0x9, 0x3a}", SkFloatToFixed(0.9000f), 63, 0xe6403a, 63}, |
| {"0.9500 => {0x3c, 0xc, 0x3d}", SkFloatToFixed(0.9500f), 63, 0xf3003d, 63}, |
| {"0.9990 => {0x3f, 0xe, 0x00}", SkFloatToFixed(0.9990f), 63, 0xff8000, 63}, |
| // As we go past 1.0, we wrap around, conceptually similar to modular arithmetic. |
| {"1.0000 => {0x00, 0x0, 0x01}", SkFloatToFixed(1.0000f), 63, 0x000001, 63}, |
| {"1.1000 => {0x06, 0x6, 0x07}", SkFloatToFixed(1.1000f), 63, 0x198007, 63}, |
| {"1.1234 => {0x07, 0xe, 0x08}", SkFloatToFixed(1.1234f), 63, 0x1f8008, 63}, |
| {"1.9500 => {0x3c, 0xc, 0x3d}", SkFloatToFixed(1.9500f), 63, 0xf3003d, 63}, |
| // Maximum has changed from 63 to 256 |
| {"0.4567 => {0x75, 0x5, 0x76}", SkFloatToFixed(0.4567f), 256, 0x1d54076, 256}, |
| {"1.0000 => {0x00, 0x0, 0x01}", SkFloatToFixed(1.0000f), 256, 0x0000001, 256}, |
| {"1.2345 => {0x3c, 0x4, 0x3d}", SkFloatToFixed(1.2345f), 256, 0x0f1003d, 256}, |
| // width does not have to match the maximum value (e.g. rescaling) |
| {"0.1111 [64,128] => {0x07, 0x3, 0x07}", SkFloatToFixed(0.1111f), 64, 0x1cc007, 128}, |
| {"0.1111 [64,256] => {0x07, 0x3, 0x07}", SkFloatToFixed(0.1111f), 64, 0x1cc007, 256}, |
| {"0.1111 [64,512] => {0x07, 0x3, 0x07}", SkFloatToFixed(0.1111f), 64, 0x1cc007, 512}, |
| {"0.1111 [64, 32] => {0x07, 0x3, 0x09}", SkFloatToFixed(0.1111f), 64, 0x1cc009, 32}, |
| {"0.1111 [64, 8] => {0x07, 0x3, 0x0f}", SkFloatToFixed(0.1111f), 64, 0x1cc00f, 8}, |
| }; |
| |
| constexpr size_t NUM_TESTS = sizeof(tests) / sizeof(TestCase); |
| |
| for (size_t i = 0; i < NUM_TESTS; i++) { |
| TestCase tc = tests[i]; |
| uint32_t rv = sktests::pack_repeat(tc.input, tc.max, tc.width); |
| uint32_t exp = tc.expectedOutput; |
| |
| REPORTER_ASSERT(r, rv == tc.expectedOutput, |
| "%s | %x != %x | {%x, %x, %x} != {%x, %x, %x}\n", |
| tc.name.c_str(), rv, exp, |
| highBits(rv), middleBits(rv), lowBits(rv), |
| highBits(exp), middleBits(exp), lowBits(exp)); |
| } |
| } |
| |
| DEF_TEST(MatrixProcs_pack_mirror, r) { |
| struct TestCase { |
| std::string name; |
| SkFixed input; |
| unsigned max; |
| uint32_t expectedOutput; |
| size_t width; |
| }; |
| TestCase tests[] = { |
| // negative values are treated similarly to absolute values, except |
| // the first integer is bigger than the last integer. |
| {"-0.300 => {0x13, 0xc, 0x12}", SkFloatToFixed(-0.300f), 63, 0x4f0012, 63}, |
| {"-0.200 => {0x0c, 0x3, 0x0b}", SkFloatToFixed(-0.200f), 63, 0x30c00b, 63}, |
| {"-0.100 => {0x06, 0x9, 0x05}", SkFloatToFixed(-0.100f), 63, 0x1a4005, 63}, |
| // The domain of the function is primarily [0.0, 1.0) |
| {"0.0000 => {0x00, 0x0, 0x01}", SkFloatToFixed(0.0000f), 63, 0x000001, 63}, |
| {"0.1000 => {0x06, 0x6, 0x07}", SkFloatToFixed(0.1000f), 63, 0x198007, 63}, |
| {"0.1234 => {0x07, 0xe, 0x08}", SkFloatToFixed(0.1234f), 63, 0x1f8008, 63}, |
| {"0.2000 => {0x0c, 0xc, 0x0d}", SkFloatToFixed(0.2000f), 63, 0x33000d, 63}, |
| {"0.3000 => {0x13, 0x3, 0x14}", SkFloatToFixed(0.3000f), 63, 0x4cc014, 63}, |
| {"0.4000 => {0x19, 0x9, 0x1a}", SkFloatToFixed(0.4000f), 63, 0x66401a, 63}, |
| {"0.5000 => {0x20, 0x0, 0x21}", SkFloatToFixed(0.5000f), 63, 0x800021, 63}, |
| {"0.5678 => {0x24, 0x5, 0x25}", SkFloatToFixed(0.5678f), 63, 0x914025, 63}, |
| {"0.6000 => {0x26, 0x6, 0x27}", SkFloatToFixed(0.6000f), 63, 0x998027, 63}, |
| {"0.7000 => {0x2c, 0xc, 0x2d}", SkFloatToFixed(0.7000f), 63, 0xb3002d, 63}, |
| {"0.8000 => {0x33, 0x3, 0x34}", SkFloatToFixed(0.8000f), 63, 0xccc034, 63}, |
| {"0.9000 => {0x39, 0x9, 0x3a}", SkFloatToFixed(0.9000f), 63, 0xe6403a, 63}, |
| {"0.9500 => {0x3c, 0xc, 0x3d}", SkFloatToFixed(0.9500f), 63, 0xf3003d, 63}, |
| {"0.9990 => {0x3f, 0xe, 0x3f}", SkFloatToFixed(0.9990f), 63, 0xff803f, 63}, |
| // As we go past 1.0, we bounce back, as off a wall or reflecting off a mirror. |
| {"1.0000 => {0x3f, 0x0, 0x3e}", SkFloatToFixed(1.0000f), 63, 0xfc003e, 63}, |
| {"1.1000 => {0x39, 0x6, 0x38}", SkFloatToFixed(1.1000f), 63, 0xe58038, 63}, |
| {"1.1234 => {0x38, 0xe, 0x37}", SkFloatToFixed(1.1234f), 63, 0xe38037, 63}, |
| {"1.9500 => {0x03, 0xc, 0x02}", SkFloatToFixed(1.9500f), 63, 0xf0002, 63}, |
| // Maximum has changed from 63 to 256 |
| {"0.4567 => {0x75, 0x5, 0x76}", SkFloatToFixed(0.4567f), 256, 0x1d54076, 256}, |
| {"1.0000 => {0x100,0x0, 0xff}", SkFloatToFixed(1.0000f), 256, 0x40000ff, 256}, |
| {"1.2345 => {0xc4, 0x4, 0xc3}", SkFloatToFixed(1.2345f), 256, 0x31100c3, 256}, |
| // width does not have to match the maximum value (e.g. rescaling) |
| {"0.1111 [64,128] => {0x07, 0x3, 0x07}", SkFloatToFixed(0.1111f), 64, 0x1cc007, 128}, |
| {"0.1111 [64,256] => {0x07, 0x3, 0x07}", SkFloatToFixed(0.1111f), 64, 0x1cc007, 256}, |
| {"0.1111 [64,512] => {0x07, 0x3, 0x07}", SkFloatToFixed(0.1111f), 64, 0x1cc007, 512}, |
| {"0.1111 [64, 32] => {0x07, 0x3, 0x09}", SkFloatToFixed(0.1111f), 64, 0x1cc009, 32}, |
| {"0.1111 [64, 8] => {0x07, 0x3, 0x0f}", SkFloatToFixed(0.1111f), 64, 0x1cc00f, 8}, |
| }; |
| |
| constexpr size_t NUM_TESTS = sizeof(tests) / sizeof(TestCase); |
| |
| for (size_t i = 0; i < NUM_TESTS; i++) { |
| TestCase tc = tests[i]; |
| uint32_t rv = sktests::pack_mirror(tc.input, tc.max, tc.width); |
| uint32_t exp = tc.expectedOutput; |
| |
| REPORTER_ASSERT(r, rv == tc.expectedOutput, |
| "%s | %x != %x | {%x, %x, %x} != {%x, %x, %x}\n", |
| tc.name.c_str(), rv, exp, |
| highBits(rv), middleBits(rv), lowBits(rv), |
| highBits(exp), middleBits(exp), lowBits(exp)); |
| } |
| } |
| |
| DEF_TEST(MatrixProcs_unpack_int, r) { |
| struct TestCase { |
| std::string name; |
| uint32_t input; |
| int expectedLowerBound; |
| int expectedLerp; |
| int expectedUpperBound; |
| }; |
| // These are selected from earlier tests to make sure the packed values unpack correctly. |
| TestCase tests[] = { |
| {"0x000000 => {0x00, 0x0, 0x00}", 0x000000, 0x00, 0x0, 0x00}, |
| {"0x074002 => {0x01, 0xd, 0x02}", 0x074002, 0x01, 0xd, 0x02}, |
| {"0x15c006 => {0x05, 0x7, 0x06}", 0x15c006, 0x05, 0x7, 0x06}, |
| {"0x1d0008 => {0x07, 0x4, 0x08}", 0x1d0008, 0x07, 0x4, 0x08}, |
| {"0x24000a => {0x09, 0x0, 0x0a}", 0x24000a, 0x09, 0x0, 0x0a}, |
| {"0xfc003f => {0x3f, 0x0, 0x3f}", 0xfc003f, 0x3f, 0x0, 0x3f}, |
| {"0x4000100 => {0x100, 0x0, 0x100}", 0x4000100, 0x100, 0x0, 0x100}, |
| }; |
| |
| constexpr size_t NUM_TESTS = sizeof(tests) / sizeof(TestCase); |
| |
| for (size_t i = 0; i < NUM_TESTS; i++) { |
| TestCase tc = tests[i]; |
| int lower, upper, lerp; |
| sktests::decode_packed_coordinates_and_weight(tc.input, &lower, &upper, &lerp); |
| |
| REPORTER_ASSERT(r, lower == tc.expectedLowerBound, |
| "%s lower %x != %x", tc.name.c_str(), lower, tc.expectedLowerBound); |
| REPORTER_ASSERT(r, lerp == tc.expectedLerp, |
| "%s lerp %x != %x", tc.name.c_str(), lerp, tc.expectedLerp); |
| REPORTER_ASSERT(r, upper == tc.expectedUpperBound, |
| "%s upper %x != %x", tc.name.c_str(), upper, tc.expectedUpperBound); |
| // Make sure our helpers work as expected. |
| SkASSERT(tc.expectedLowerBound == highBits(tc.input)); |
| SkASSERT(tc.expectedLerp == middleBits(tc.input)); |
| SkASSERT(tc.expectedUpperBound == lowBits(tc.input)); |
| } |
| } |
