| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "../skcms.h" |
| #include "Curve.h" |
| #include "LinearAlgebra.h" |
| #include "Macros.h" |
| #include "PortableMath.h" |
| #include "TransferFunction.h" |
| #include "Transform.h" |
| #include <assert.h> |
| #include <limits.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| // Without this wasm would try to use the N=4 128-bit vector code path, |
| // which while ideal, causes tons of compiler problems. This would be |
| // a good thing to revisit as emcc matures (currently 1.38.5). |
| #if 1 && defined(__EMSCRIPTEN_major__) |
| #if !defined(SKCMS_PORTABLE) |
| #define SKCMS_PORTABLE |
| #endif |
| #endif |
| |
| extern bool g_skcms_dump_profile; |
| bool g_skcms_dump_profile = false; |
| |
| #if !defined(NDEBUG) && defined(__clang__) |
| // Basic profiling tools to time each Op. Not at all thread safe. |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| #if defined(__arm__) || defined(__aarch64__) |
| #include <time.h> |
| static const char* now_units = "ticks"; |
| static uint64_t now() { return (uint64_t)clock(); } |
| #else |
| static const char* now_units = "cycles"; |
| static uint64_t now() { return __builtin_readcyclecounter(); } |
| #endif |
| |
| #define M(op) +1 |
| static uint64_t counts[FOREACH_Op(M)]; |
| #undef M |
| |
| static void profile_dump_stats() { |
| #define M(op) #op, |
| static const char* names[] = { FOREACH_Op(M) }; |
| #undef M |
| for (int i = 0; i < ARRAY_COUNT(counts); i++) { |
| if (counts[i]) { |
| fprintf(stderr, "%16s: %12llu %s\n", |
| names[i], (unsigned long long)counts[i], now_units); |
| } |
| } |
| } |
| |
| static inline Op profile_next_op(Op op) { |
| if (__builtin_expect(g_skcms_dump_profile, false)) { |
| static uint64_t start = 0; |
| static uint64_t* current = NULL; |
| |
| if (!current) { |
| atexit(profile_dump_stats); |
| } else { |
| *current += now() - start; |
| } |
| |
| current = &counts[op]; |
| start = now(); |
| } |
| return op; |
| } |
| #else |
| static inline Op profile_next_op(Op op) { |
| (void)g_skcms_dump_profile; |
| return op; |
| } |
| #endif |
| |
| #if defined(__clang__) |
| typedef float __attribute__((ext_vector_type(4))) Fx4; |
| typedef int32_t __attribute__((ext_vector_type(4))) I32x4; |
| typedef uint64_t __attribute__((ext_vector_type(4))) U64x4; |
| typedef uint32_t __attribute__((ext_vector_type(4))) U32x4; |
| typedef uint16_t __attribute__((ext_vector_type(4))) U16x4; |
| typedef uint8_t __attribute__((ext_vector_type(4))) U8x4; |
| |
| typedef float __attribute__((ext_vector_type(8))) Fx8; |
| typedef int32_t __attribute__((ext_vector_type(8))) I32x8; |
| typedef uint64_t __attribute__((ext_vector_type(8))) U64x8; |
| typedef uint32_t __attribute__((ext_vector_type(8))) U32x8; |
| typedef uint16_t __attribute__((ext_vector_type(8))) U16x8; |
| typedef uint8_t __attribute__((ext_vector_type(8))) U8x8; |
| |
| typedef float __attribute__((ext_vector_type(16))) Fx16; |
| typedef int32_t __attribute__((ext_vector_type(16))) I32x16; |
| typedef uint64_t __attribute__((ext_vector_type(16))) U64x16; |
| typedef uint32_t __attribute__((ext_vector_type(16))) U32x16; |
| typedef uint16_t __attribute__((ext_vector_type(16))) U16x16; |
| typedef uint8_t __attribute__((ext_vector_type(16))) U8x16; |
| #elif defined(__GNUC__) |
| typedef float __attribute__((vector_size(16))) Fx4; |
| typedef int32_t __attribute__((vector_size(16))) I32x4; |
| typedef uint64_t __attribute__((vector_size(32))) U64x4; |
| typedef uint32_t __attribute__((vector_size(16))) U32x4; |
| typedef uint16_t __attribute__((vector_size( 8))) U16x4; |
| typedef uint8_t __attribute__((vector_size( 4))) U8x4; |
| |
| typedef float __attribute__((vector_size(32))) Fx8; |
| typedef int32_t __attribute__((vector_size(32))) I32x8; |
| typedef uint64_t __attribute__((vector_size(64))) U64x8; |
| typedef uint32_t __attribute__((vector_size(32))) U32x8; |
| typedef uint16_t __attribute__((vector_size(16))) U16x8; |
| typedef uint8_t __attribute__((vector_size( 8))) U8x8; |
| |
| typedef float __attribute__((vector_size( 64))) Fx16; |
| typedef int32_t __attribute__((vector_size( 64))) I32x16; |
| typedef uint64_t __attribute__((vector_size(128))) U64x16; |
| typedef uint32_t __attribute__((vector_size( 64))) U32x16; |
| typedef uint16_t __attribute__((vector_size( 32))) U16x16; |
| typedef uint8_t __attribute__((vector_size( 16))) U8x16; |
| #endif |
| |
| // First, instantiate our default exec_ops() implementation using the default compiliation target. |
| |
| #if defined(SKCMS_PORTABLE) || !(defined(__clang__) || defined(__GNUC__)) |
| #define N 1 |
| |
| #define F float |
| #define U64 uint64_t |
| #define U32 uint32_t |
| #define I32 int32_t |
| #define U16 uint16_t |
| #define U8 uint8_t |
| |
| #define F0 0.0f |
| #define F1 1.0f |
| |
| #elif defined(__AVX512F__) |
| #define N 16 |
| |
| #define F Fx16 |
| #define U64 U64x16 |
| #define U32 U32x16 |
| #define I32 I32x16 |
| #define U16 U16x16 |
| #define U8 U8x16 |
| |
| #define F0 (F){0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0} |
| #define F1 (F){1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1} |
| #elif defined(__AVX__) |
| #define N 8 |
| |
| #define F Fx8 |
| #define U64 U64x8 |
| #define U32 U32x8 |
| #define I32 I32x8 |
| #define U16 U16x8 |
| #define U8 U8x8 |
| |
| #define F0 (F){0,0,0,0, 0,0,0,0} |
| #define F1 (F){1,1,1,1, 1,1,1,1} |
| #else |
| #define N 4 |
| |
| #define F Fx4 |
| #define U64 U64x4 |
| #define U32 U32x4 |
| #define I32 I32x4 |
| #define U16 U16x4 |
| #define U8 U8x4 |
| |
| #define F0 (F){0,0,0,0} |
| #define F1 (F){1,1,1,1} |
| #endif |
| |
| #define NS(id) id |
| #define ATTR |
| #include "Transform_inl.h" |
| #undef N |
| #undef F |
| #undef U64 |
| #undef U32 |
| #undef I32 |
| #undef U16 |
| #undef U8 |
| #undef F0 |
| #undef F1 |
| #undef NS |
| #undef ATTR |
| |
| // Now, instantiate any other versions of run_program() we may want for runtime detection. |
| #if !defined(SKCMS_PORTABLE) && (defined(__clang__) || defined(__GNUC__)) \ |
| && defined(__x86_64__) && !defined(__AVX2__) |
| #define N 8 |
| #define F Fx8 |
| #define U64 U64x8 |
| #define U32 U32x8 |
| #define I32 I32x8 |
| #define U16 U16x8 |
| #define U8 U8x8 |
| #define F0 (F){0,0,0,0, 0,0,0,0} |
| #define F1 (F){1,1,1,1, 1,1,1,1} |
| |
| #define NS(id) id ## _hsw |
| #define ATTR __attribute__((target("avx2,f16c"))) |
| |
| // We check these guards to see if we have support for these features. |
| // They're likely _not_ defined here in our baseline build config. |
| #ifndef __AVX__ |
| #define __AVX__ 1 |
| #define UNDEF_AVX |
| #endif |
| #ifndef __F16C__ |
| #define __F16C__ 1 |
| #define UNDEF_F16C |
| #endif |
| #ifndef __AVX2__ |
| #define __AVX2__ 1 |
| #define UNDEF_AVX2 |
| #endif |
| |
| #include "Transform_inl.h" |
| |
| #undef N |
| #undef F |
| #undef U64 |
| #undef U32 |
| #undef I32 |
| #undef U16 |
| #undef U8 |
| #undef F0 |
| #undef F1 |
| #undef NS |
| #undef ATTR |
| |
| #ifdef UNDEF_AVX |
| #undef __AVX__ |
| #undef UNDEF_AVX |
| #endif |
| #ifdef UNDEF_F16C |
| #undef __F16C__ |
| #undef UNDEF_F16C |
| #endif |
| #ifdef UNDEF_AVX2 |
| #undef __AVX2__ |
| #undef UNDEF_AVX2 |
| #endif |
| |
| #define TEST_FOR_HSW |
| |
| static bool hsw_ok_ = false; |
| static void check_hsw_ok() { |
| // See http://www.sandpile.org/x86/cpuid.htm |
| |
| // First, a basic cpuid(1). |
| uint32_t eax, ebx, ecx, edx; |
| __asm__ __volatile__("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) |
| : "0"(1), "2"(0)); |
| |
| // Sanity check for prerequisites. |
| if ((edx & (1<<25)) != (1<<25)) { return; } // SSE |
| if ((edx & (1<<26)) != (1<<26)) { return; } // SSE2 |
| if ((ecx & (1<< 0)) != (1<< 0)) { return; } // SSE3 |
| if ((ecx & (1<< 9)) != (1<< 9)) { return; } // SSSE3 |
| if ((ecx & (1<<19)) != (1<<19)) { return; } // SSE4.1 |
| if ((ecx & (1<<20)) != (1<<20)) { return; } // SSE4.2 |
| |
| if ((ecx & (3<<26)) != (3<<26)) { return; } // XSAVE + OSXSAVE |
| |
| { |
| uint32_t eax_xgetbv, edx_xgetbv; |
| __asm__ __volatile__("xgetbv" : "=a"(eax_xgetbv), "=d"(edx_xgetbv) : "c"(0)); |
| if ((eax_xgetbv & (3<<1)) != (3<<1)) { return; } // XMM+YMM state saved? |
| } |
| |
| if ((ecx & (1<<28)) != (1<<28)) { return; } // AVX |
| if ((ecx & (1<<29)) != (1<<29)) { return; } // F16C |
| if ((ecx & (1<<12)) != (1<<12)) { return; } // FMA (TODO: not currently used) |
| |
| // Call cpuid(7) to check for our final AVX2 feature bit! |
| __asm__ __volatile__("cpuid" : "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx) |
| : "0"(7), "2"(0)); |
| if ((ebx & (1<< 5)) != (1<< 5)) { return; } // AVX2 |
| |
| hsw_ok_ = true; |
| } |
| |
| #if defined(_MSC_VER) |
| #include <Windows.h> |
| INIT_ONCE check_hsw_ok_once = INIT_ONCE_STATIC_INIT; |
| |
| static BOOL check_hsw_ok_InitOnce_wrapper(INIT_ONCE* once, void* param, void** ctx) { |
| (void)once; |
| (void)param; |
| (void)ctx; |
| check_hsw_ok(); |
| return TRUE; |
| } |
| |
| static bool hsw_ok() { |
| InitOnceExecuteOnce(&check_hsw_ok_once, check_hsw_ok_InitOnce_wrapper, NULL, NULL); |
| return hsw_ok_; |
| } |
| #else |
| #include <pthread.h> |
| static pthread_once_t check_hsw_ok_once = PTHREAD_ONCE_INIT; |
| |
| static bool hsw_ok() { |
| pthread_once(&check_hsw_ok_once, check_hsw_ok); |
| return hsw_ok_; |
| } |
| #endif |
| |
| #endif |
| |
| static bool is_identity_tf(const skcms_TransferFunction* tf) { |
| return tf->g == 1 && tf->a == 1 |
| && tf->b == 0 && tf->c == 0 && tf->d == 0 && tf->e == 0 && tf->f == 0; |
| } |
| |
| typedef struct { |
| Op op; |
| const void* arg; |
| } OpAndArg; |
| |
| static OpAndArg select_curve_op(const skcms_Curve* curve, int channel) { |
| static const struct { Op parametric, table_8, table_16; } ops[] = { |
| { Op_tf_r, Op_table_8_r, Op_table_16_r }, |
| { Op_tf_g, Op_table_8_g, Op_table_16_g }, |
| { Op_tf_b, Op_table_8_b, Op_table_16_b }, |
| { Op_tf_a, Op_table_8_a, Op_table_16_a }, |
| }; |
| |
| if (curve->table_entries == 0) { |
| return is_identity_tf(&curve->parametric) |
| ? (OpAndArg){ Op_noop, NULL } |
| : (OpAndArg){ ops[channel].parametric, &curve->parametric }; |
| } else if (curve->table_8) { |
| return (OpAndArg){ ops[channel].table_8, curve }; |
| } else if (curve->table_16) { |
| return (OpAndArg){ ops[channel].table_16, curve }; |
| } |
| |
| assert(false); |
| return (OpAndArg){Op_noop,NULL}; |
| } |
| |
| static size_t bytes_per_pixel(skcms_PixelFormat fmt) { |
| switch (fmt >> 1) { // ignore rgb/bgr |
| case skcms_PixelFormat_RGB_565 >> 1: return 2; |
| case skcms_PixelFormat_RGB_888 >> 1: return 3; |
| case skcms_PixelFormat_RGBA_8888 >> 1: return 4; |
| case skcms_PixelFormat_RGBA_1010102 >> 1: return 4; |
| case skcms_PixelFormat_RGB_161616 >> 1: return 6; |
| case skcms_PixelFormat_RGBA_16161616 >> 1: return 8; |
| case skcms_PixelFormat_RGB_hhh >> 1: return 6; |
| case skcms_PixelFormat_RGBA_hhhh >> 1: return 8; |
| case skcms_PixelFormat_RGB_fff >> 1: return 12; |
| case skcms_PixelFormat_RGBA_ffff >> 1: return 16; |
| } |
| assert(false); |
| return 0; |
| } |
| |
| static bool prep_for_destination(const skcms_ICCProfile* profile, |
| skcms_Matrix3x3* fromXYZD50, |
| skcms_TransferFunction* invR, |
| skcms_TransferFunction* invG, |
| skcms_TransferFunction* invB) { |
| // We only support destinations with parametric transfer functions |
| // and with gamuts that can be transformed from XYZD50. |
| return profile->has_trc |
| && profile->has_toXYZD50 |
| && profile->trc[0].table_entries == 0 |
| && profile->trc[1].table_entries == 0 |
| && profile->trc[2].table_entries == 0 |
| && skcms_TransferFunction_invert(&profile->trc[0].parametric, invR) |
| && skcms_TransferFunction_invert(&profile->trc[1].parametric, invG) |
| && skcms_TransferFunction_invert(&profile->trc[2].parametric, invB) |
| && skcms_Matrix3x3_invert(&profile->toXYZD50, fromXYZD50); |
| } |
| |
| bool skcms_Transform(const void* src, |
| skcms_PixelFormat srcFmt, |
| skcms_AlphaFormat srcAlpha, |
| const skcms_ICCProfile* srcProfile, |
| void* dst, |
| skcms_PixelFormat dstFmt, |
| skcms_AlphaFormat dstAlpha, |
| const skcms_ICCProfile* dstProfile, |
| size_t nz) { |
| const size_t dst_bpp = bytes_per_pixel(dstFmt), |
| src_bpp = bytes_per_pixel(srcFmt); |
| // Let's just refuse if the request is absurdly big. |
| if (nz * dst_bpp > INT_MAX || nz * src_bpp > INT_MAX) { |
| return false; |
| } |
| int n = (int)nz; |
| |
| // Null profiles default to sRGB. Passing null for both is handy when doing format conversion. |
| if (!srcProfile) { |
| srcProfile = skcms_sRGB_profile(); |
| } |
| if (!dstProfile) { |
| dstProfile = skcms_sRGB_profile(); |
| } |
| |
| // We can't transform in place unless the PixelFormats are the same size. |
| if (dst == src && (dstFmt >> 1) != (srcFmt >> 1)) { |
| return false; |
| } |
| // TODO: this check lazilly disallows U16 <-> F16, but that would actually be fine. |
| // TODO: more careful alias rejection (like, dst == src + 1)? |
| |
| Op program [32]; |
| const void* arguments[32]; |
| |
| Op* ops = program; |
| const void** args = arguments; |
| |
| skcms_TransferFunction inv_dst_tf_r, inv_dst_tf_g, inv_dst_tf_b; |
| skcms_Matrix3x3 from_xyz; |
| |
| switch (srcFmt >> 1) { |
| default: return false; |
| case skcms_PixelFormat_RGB_565 >> 1: *ops++ = Op_load_565; break; |
| case skcms_PixelFormat_RGB_888 >> 1: *ops++ = Op_load_888; break; |
| case skcms_PixelFormat_RGBA_8888 >> 1: *ops++ = Op_load_8888; break; |
| case skcms_PixelFormat_RGBA_1010102 >> 1: *ops++ = Op_load_1010102; break; |
| case skcms_PixelFormat_RGB_161616 >> 1: *ops++ = Op_load_161616; break; |
| case skcms_PixelFormat_RGBA_16161616 >> 1: *ops++ = Op_load_16161616; break; |
| case skcms_PixelFormat_RGB_hhh >> 1: *ops++ = Op_load_hhh; break; |
| case skcms_PixelFormat_RGBA_hhhh >> 1: *ops++ = Op_load_hhhh; break; |
| case skcms_PixelFormat_RGB_fff >> 1: *ops++ = Op_load_fff; break; |
| case skcms_PixelFormat_RGBA_ffff >> 1: *ops++ = Op_load_ffff; break; |
| } |
| if (srcFmt & 1) { |
| *ops++ = Op_swap_rb; |
| } |
| |
| if (srcProfile->data_color_space == skcms_Signature_CMYK) { |
| // Photoshop creates CMYK images as inverse CMYK. |
| // These happen to be the only ones we've _ever_ seen. |
| *ops++ = Op_invert; |
| // With CMYK, ignore the alpha type, to avoid changing K or conflating CMY with K. |
| srcAlpha = skcms_AlphaFormat_Unpremul; |
| } |
| |
| if (srcAlpha == skcms_AlphaFormat_Opaque) { |
| *ops++ = Op_force_opaque; |
| } else if (srcAlpha == skcms_AlphaFormat_PremulAsEncoded) { |
| *ops++ = Op_unpremul; |
| } |
| |
| // TODO: We can skip this work if both srcAlpha and dstAlpha are PremulLinear, and the profiles |
| // are the same. Also, if dstAlpha is PremulLinear, and SrcAlpha is Opaque. |
| if (dstProfile != srcProfile || |
| srcAlpha == skcms_AlphaFormat_PremulLinear || |
| dstAlpha == skcms_AlphaFormat_PremulLinear) { |
| |
| if (!prep_for_destination(dstProfile, |
| &from_xyz, &inv_dst_tf_r, &inv_dst_tf_b, &inv_dst_tf_g)) { |
| return false; |
| } |
| |
| if (srcProfile->has_A2B) { |
| if (srcProfile->A2B.input_channels) { |
| for (int i = 0; i < (int)srcProfile->A2B.input_channels; i++) { |
| OpAndArg oa = select_curve_op(&srcProfile->A2B.input_curves[i], i); |
| if (oa.op != Op_noop) { |
| *ops++ = oa.op; |
| *args++ = oa.arg; |
| } |
| } |
| switch (srcProfile->A2B.input_channels) { |
| case 3: *ops++ = srcProfile->A2B.grid_8 ? Op_clut_3D_8 : Op_clut_3D_16; break; |
| case 4: *ops++ = srcProfile->A2B.grid_8 ? Op_clut_4D_8 : Op_clut_4D_16; break; |
| default: return false; |
| } |
| *args++ = &srcProfile->A2B; |
| } |
| |
| if (srcProfile->A2B.matrix_channels == 3) { |
| for (int i = 0; i < 3; i++) { |
| OpAndArg oa = select_curve_op(&srcProfile->A2B.matrix_curves[i], i); |
| if (oa.op != Op_noop) { |
| *ops++ = oa.op; |
| *args++ = oa.arg; |
| } |
| } |
| |
| static const skcms_Matrix3x4 I = {{ |
| {1,0,0,0}, |
| {0,1,0,0}, |
| {0,0,1,0}, |
| }}; |
| if (0 != memcmp(&I, &srcProfile->A2B.matrix, sizeof(I))) { |
| *ops++ = Op_matrix_3x4; |
| *args++ = &srcProfile->A2B.matrix; |
| } |
| } |
| |
| if (srcProfile->A2B.output_channels == 3) { |
| for (int i = 0; i < 3; i++) { |
| OpAndArg oa = select_curve_op(&srcProfile->A2B.output_curves[i], i); |
| if (oa.op != Op_noop) { |
| *ops++ = oa.op; |
| *args++ = oa.arg; |
| } |
| } |
| } |
| |
| if (srcProfile->pcs == skcms_Signature_Lab) { |
| *ops++ = Op_lab_to_xyz; |
| } |
| |
| } else if (srcProfile->has_trc && srcProfile->has_toXYZD50) { |
| for (int i = 0; i < 3; i++) { |
| OpAndArg oa = select_curve_op(&srcProfile->trc[i], i); |
| if (oa.op != Op_noop) { |
| *ops++ = oa.op; |
| *args++ = oa.arg; |
| } |
| } |
| } else { |
| return false; |
| } |
| |
| // At this point our source colors are linear, either RGB (XYZ-type profiles) |
| // or XYZ (A2B-type profiles). Unpremul is a linear operation (multiply by a |
| // constant 1/a), so either way we can do it now if needed. |
| if (srcAlpha == skcms_AlphaFormat_PremulLinear) { |
| *ops++ = Op_unpremul; |
| } |
| |
| // A2B sources should already be in XYZD50 at this point. |
| // Others still need to be transformed using their toXYZD50 matrix. |
| // N.B. There are profiles that contain both A2B tags and toXYZD50 matrices. |
| // If we use the A2B tags, we need to ignore the XYZD50 matrix entirely. |
| assert (srcProfile->has_A2B || srcProfile->has_toXYZD50); |
| static const skcms_Matrix3x3 I = {{ |
| { 1.0f, 0.0f, 0.0f }, |
| { 0.0f, 1.0f, 0.0f }, |
| { 0.0f, 0.0f, 1.0f }, |
| }}; |
| const skcms_Matrix3x3* to_xyz = srcProfile->has_A2B ? &I : &srcProfile->toXYZD50; |
| |
| // There's a chance the source and destination gamuts are identical, |
| // in which case we can skip the gamut transform. |
| if (0 != memcmp(&dstProfile->toXYZD50, to_xyz, sizeof(skcms_Matrix3x3))) { |
| // Concat the entire gamut transform into from_xyz, |
| // now slightly misnamed but it's a handy spot to stash the result. |
| from_xyz = skcms_Matrix3x3_concat(&from_xyz, to_xyz); |
| *ops++ = Op_matrix_3x3; |
| *args++ = &from_xyz; |
| } |
| |
| if (dstAlpha == skcms_AlphaFormat_PremulLinear) { |
| *ops++ = Op_premul; |
| } |
| |
| // Encode back to dst RGB using its parametric transfer functions. |
| if (!is_identity_tf(&inv_dst_tf_r)) { *ops++ = Op_tf_r; *args++ = &inv_dst_tf_r; } |
| if (!is_identity_tf(&inv_dst_tf_g)) { *ops++ = Op_tf_g; *args++ = &inv_dst_tf_g; } |
| if (!is_identity_tf(&inv_dst_tf_b)) { *ops++ = Op_tf_b; *args++ = &inv_dst_tf_b; } |
| } |
| |
| if (dstAlpha == skcms_AlphaFormat_Opaque) { |
| *ops++ = Op_force_opaque; |
| } else if (dstAlpha == skcms_AlphaFormat_PremulAsEncoded) { |
| *ops++ = Op_premul; |
| } |
| if (dstFmt & 1) { |
| *ops++ = Op_swap_rb; |
| } |
| if (dstFmt < skcms_PixelFormat_RGB_hhh) { |
| *ops++ = Op_clamp; |
| } |
| switch (dstFmt >> 1) { |
| default: return false; |
| case skcms_PixelFormat_RGB_565 >> 1: *ops++ = Op_store_565; break; |
| case skcms_PixelFormat_RGB_888 >> 1: *ops++ = Op_store_888; break; |
| case skcms_PixelFormat_RGBA_8888 >> 1: *ops++ = Op_store_8888; break; |
| case skcms_PixelFormat_RGBA_1010102 >> 1: *ops++ = Op_store_1010102; break; |
| case skcms_PixelFormat_RGB_161616 >> 1: *ops++ = Op_store_161616; break; |
| case skcms_PixelFormat_RGBA_16161616 >> 1: *ops++ = Op_store_16161616; break; |
| case skcms_PixelFormat_RGB_hhh >> 1: *ops++ = Op_store_hhh; break; |
| case skcms_PixelFormat_RGBA_hhhh >> 1: *ops++ = Op_store_hhhh; break; |
| case skcms_PixelFormat_RGB_fff >> 1: *ops++ = Op_store_fff; break; |
| case skcms_PixelFormat_RGBA_ffff >> 1: *ops++ = Op_store_ffff; break; |
| } |
| |
| void (*run)(const Op*, const void**, const char*, char*, int, size_t,size_t) = run_program; |
| #if defined(TEST_FOR_HSW) |
| if (hsw_ok()) { |
| run = run_program_hsw; |
| } |
| #endif |
| run(program, arguments, src, dst, n, src_bpp,dst_bpp); |
| return true; |
| } |
| |
| static void assert_usable_as_destination(const skcms_ICCProfile* profile) { |
| #if defined(NDEBUG) |
| (void)profile; |
| #else |
| skcms_Matrix3x3 fromXYZD50; |
| skcms_TransferFunction invR, invG, invB; |
| assert(prep_for_destination(profile, &fromXYZD50, &invR, &invG, &invB)); |
| #endif |
| } |
| |
| bool skcms_MakeUsableAsDestination(skcms_ICCProfile* profile) { |
| skcms_Matrix3x3 fromXYZD50; |
| if (!profile->has_trc || !profile->has_toXYZD50 |
| || !skcms_Matrix3x3_invert(&profile->toXYZD50, &fromXYZD50)) { |
| return false; |
| } |
| |
| skcms_TransferFunction tf[3]; |
| for (int i = 0; i < 3; i++) { |
| skcms_TransferFunction inv; |
| if (profile->trc[i].table_entries == 0 |
| && skcms_TransferFunction_invert(&profile->trc[i].parametric, &inv)) { |
| tf[i] = profile->trc[i].parametric; |
| continue; |
| } |
| |
| float max_error; |
| // Parametric curves from skcms_ApproximateCurve() are guaranteed to be invertible. |
| if (!skcms_ApproximateCurve(&profile->trc[i], &tf[i], &max_error)) { |
| return false; |
| } |
| } |
| |
| for (int i = 0; i < 3; ++i) { |
| profile->trc[i].table_entries = 0; |
| profile->trc[i].parametric = tf[i]; |
| } |
| |
| assert_usable_as_destination(profile); |
| return true; |
| } |
| |
| bool skcms_MakeUsableAsDestinationWithSingleCurve(skcms_ICCProfile* profile) { |
| // Operate on a copy of profile, so we can choose the best TF for the original curves |
| skcms_ICCProfile result = *profile; |
| if (!skcms_MakeUsableAsDestination(&result)) { |
| return false; |
| } |
| |
| int best_tf = 0; |
| float min_max_error = INFINITY_; |
| for (int i = 0; i < 3; i++) { |
| skcms_TransferFunction inv; |
| skcms_TransferFunction_invert(&result.trc[i].parametric, &inv); |
| |
| float err = 0; |
| for (int j = 0; j < 3; ++j) { |
| err = fmaxf_(err, skcms_MaxRoundtripError(&profile->trc[j], &inv)); |
| } |
| if (min_max_error > err) { |
| min_max_error = err; |
| best_tf = i; |
| } |
| } |
| |
| for (int i = 0; i < 3; i++) { |
| result.trc[i].parametric = result.trc[best_tf].parametric; |
| } |
| |
| *profile = result; |
| assert_usable_as_destination(profile); |
| return true; |
| } |
