| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkColorData.h" |
| #include "SkColorSpacePriv.h" |
| #include "SkColorSpaceXformPriv.h" |
| #include "SkColorSpaceXform_A2B.h" |
| #include "SkColorSpaceXform_Base.h" |
| #include "SkColorSpace_A2B.h" |
| #include "SkColorSpace_XYZ.h" |
| #include "SkHalf.h" |
| #include "SkMakeUnique.h" |
| #include "SkOpts.h" |
| #include "SkPM4fPriv.h" |
| #include "SkRasterPipeline.h" |
| #include "SkSRGB.h" |
| #include "../jumper/SkJumper.h" |
| |
| static constexpr float sk_linear_from_2dot2[256] = { |
| 0.000000000000000000f, 0.000005077051900662f, 0.000023328004666099f, 0.000056921765712193f, |
| 0.000107187362341244f, 0.000175123977503027f, 0.000261543754548491f, 0.000367136269815943f, |
| 0.000492503787191433f, 0.000638182842167022f, 0.000804658499513058f, 0.000992374304074325f, |
| 0.001201739522438400f, 0.001433134589671860f, 0.001686915316789280f, 0.001963416213396470f, |
| 0.002262953160706430f, 0.002585825596234170f, 0.002932318323938360f, 0.003302703032003640f, |
| 0.003697239578900130f, 0.004116177093282750f, 0.004559754922526020f, 0.005028203456855540f, |
| 0.005521744850239660f, 0.006040593654849810f, 0.006584957382581690f, 0.007155037004573030f, |
| 0.007751027397660610f, 0.008373117745148580f, 0.009021491898012130f, 0.009696328701658230f, |
| 0.010397802292555300f, 0.011126082368383200f, 0.011881334434813700f, 0.012663720031582100f, |
| 0.013473396940142600f, 0.014310519374884100f, 0.015175238159625200f, 0.016067700890886900f, |
| 0.016988052089250000f, 0.017936433339950200f, 0.018912983423721500f, 0.019917838438785700f, |
| 0.020951131914781100f, 0.022012994919336500f, 0.023103556157921400f, 0.024222942067534200f, |
| 0.025371276904734600f, 0.026548682828472900f, 0.027755279978126000f, 0.028991186547107800f, |
| 0.030256518852388700f, 0.031551391400226400f, 0.032875916948383800f, 0.034230206565082000f, |
| 0.035614369684918800f, 0.037028514161960200f, 0.038472746320194600f, 0.039947171001525600f, |
| 0.041451891611462500f, 0.042987010162657100f, 0.044552627316421400f, 0.046148842422351000f, |
| 0.047775753556170600f, 0.049433457555908000f, 0.051122050056493400f, 0.052841625522879000f, |
| 0.054592277281760300f, 0.056374097551979800f, 0.058187177473685400f, 0.060031607136313200f, |
| 0.061907475605455800f, 0.063814870948677200f, 0.065753880260330100f, 0.067724589685424300f, |
| 0.069727084442598800f, 0.071761448846239100f, 0.073827766327784600f, 0.075926119456264800f, |
| 0.078056589958101900f, 0.080219258736215100f, 0.082414205888459200f, 0.084641510725429500f, |
| 0.086901251787660300f, 0.089193506862247800f, 0.091518352998919500f, 0.093875866525577800f, |
| 0.096266123063339700f, 0.098689197541094500f, 0.101145164209600000f, 0.103634096655137000f, |
| 0.106156067812744000f, 0.108711149979039000f, 0.111299414824660000f, 0.113920933406333000f, |
| 0.116575776178572000f, 0.119264013005047000f, 0.121985713169619000f, 0.124740945387051000f, |
| 0.127529777813422000f, 0.130352278056244000f, 0.133208513184300000f, 0.136098549737202000f, |
| 0.139022453734703000f, 0.141980290685736000f, 0.144972125597231000f, 0.147998022982685000f, |
| 0.151058046870511000f, 0.154152260812165000f, 0.157280727890073000f, 0.160443510725344000f, |
| 0.163640671485290000f, 0.166872271890766000f, 0.170138373223312000f, 0.173439036332135000f, |
| 0.176774321640903000f, 0.180144289154390000f, 0.183548998464951000f, 0.186988508758844000f, |
| 0.190462878822409000f, 0.193972167048093000f, 0.197516431440340000f, 0.201095729621346000f, |
| 0.204710118836677000f, 0.208359655960767000f, 0.212044397502288000f, 0.215764399609395000f, |
| 0.219519718074868000f, 0.223310408341127000f, 0.227136525505149000f, 0.230998124323267000f, |
| 0.234895259215880000f, 0.238827984272048000f, 0.242796353254002000f, 0.246800419601550000f, |
| 0.250840236436400000f, 0.254915856566385000f, 0.259027332489606000f, 0.263174716398492000f, |
| 0.267358060183772000f, 0.271577415438375000f, 0.275832833461245000f, 0.280124365261085000f, |
| 0.284452061560024000f, 0.288815972797219000f, 0.293216149132375000f, 0.297652640449211000f, |
| 0.302125496358853000f, 0.306634766203158000f, 0.311180499057984000f, 0.315762743736397000f, |
| 0.320381548791810000f, 0.325036962521076000f, 0.329729032967515000f, 0.334457807923889000f, |
| 0.339223334935327000f, 0.344025661302187000f, 0.348864834082879000f, 0.353740900096629000f, |
| 0.358653905926199000f, 0.363603897920553000f, 0.368590922197487000f, 0.373615024646202000f, |
| 0.378676250929840000f, 0.383774646487975000f, 0.388910256539059000f, 0.394083126082829000f, |
| 0.399293299902674000f, 0.404540822567962000f, 0.409825738436323000f, 0.415148091655907000f, |
| 0.420507926167587000f, 0.425905285707146000f, 0.431340213807410000f, 0.436812753800359000f, |
| 0.442322948819202000f, 0.447870841800410000f, 0.453456475485731000f, 0.459079892424160000f, |
| 0.464741134973889000f, 0.470440245304218000f, 0.476177265397440000f, 0.481952237050698000f, |
| 0.487765201877811000f, 0.493616201311074000f, 0.499505276603030000f, 0.505432468828216000f, |
| 0.511397818884880000f, 0.517401367496673000f, 0.523443155214325000f, 0.529523222417277000f, |
| 0.535641609315311000f, 0.541798355950137000f, 0.547993502196972000f, 0.554227087766085000f, |
| 0.560499152204328000f, 0.566809734896638000f, 0.573158875067523000f, 0.579546611782525000f, |
| 0.585972983949661000f, 0.592438030320847000f, 0.598941789493296000f, 0.605484299910907000f, |
| 0.612065599865624000f, 0.618685727498780000f, 0.625344720802427000f, 0.632042617620641000f, |
| 0.638779455650817000f, 0.645555272444935000f, 0.652370105410821000f, 0.659223991813387000f, |
| 0.666116968775851000f, 0.673049073280942000f, 0.680020342172095000f, 0.687030812154625000f, |
| 0.694080519796882000f, 0.701169501531402000f, 0.708297793656032000f, 0.715465432335048000f, |
| 0.722672453600255000f, 0.729918893352071000f, 0.737204787360605000f, 0.744530171266715000f, |
| 0.751895080583051000f, 0.759299550695091000f, 0.766743616862161000f, 0.774227314218442000f, |
| 0.781750677773962000f, 0.789313742415586000f, 0.796916542907978000f, 0.804559113894567000f, |
| 0.812241489898490000f, 0.819963705323528000f, 0.827725794455034000f, 0.835527791460841000f, |
| 0.843369730392169000f, 0.851251645184515000f, 0.859173569658532000f, 0.867135537520905000f, |
| 0.875137582365205000f, 0.883179737672745000f, 0.891262036813419000f, 0.899384513046529000f, |
| 0.907547199521614000f, 0.915750129279253000f, 0.923993335251873000f, 0.932276850264543000f, |
| 0.940600707035753000f, 0.948964938178195000f, 0.957369576199527000f, 0.965814653503130000f, |
| 0.974300202388861000f, 0.982826255053791000f, 0.991392843592940000f, 1.000000000000000000f, |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static void build_table_linear_from_gamma(float* outTable, float exponent) { |
| for (float x = 0.0f; x <= 1.0f; x += (1.0f/255.0f)) { |
| *outTable++ = powf(x, exponent); |
| } |
| } |
| |
| // outTable is always 256 entries, inTable may be larger or smaller. |
| static void build_table_linear_from_gamma(float* outTable, const float* inTable, |
| int inTableSize) { |
| if (256 == inTableSize) { |
| memcpy(outTable, inTable, sizeof(float) * 256); |
| return; |
| } |
| |
| for (float x = 0.0f; x <= 1.0f; x += (1.0f/255.0f)) { |
| *outTable++ = interp_lut(x, inTable, inTableSize); |
| } |
| } |
| |
| |
| static void build_table_linear_from_gamma(float* outTable, float g, float a, float b, float c, |
| float d, float e, float f) { |
| // Y = (aX + b)^g + e for X >= d |
| // Y = cX + f otherwise |
| for (float x = 0.0f; x <= 1.0f; x += (1.0f/255.0f)) { |
| if (x >= d) { |
| *outTable++ = clamp_0_1(powf(a * x + b, g) + e); |
| } else { |
| *outTable++ = clamp_0_1(c * x + f); |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static const int kDstGammaTableSize = SkColorSpaceXform_Base::kDstGammaTableSize; |
| |
| static void build_table_linear_to_gamma(uint8_t* outTable, float exponent) { |
| float toGammaExp = 1.0f / exponent; |
| |
| for (int i = 0; i < kDstGammaTableSize; i++) { |
| float x = ((float) i) * (1.0f / ((float) (kDstGammaTableSize - 1))); |
| outTable[i] = clamp_normalized_float_to_byte(powf(x, toGammaExp)); |
| } |
| } |
| |
| static void build_table_linear_to_gamma(uint8_t* outTable, const float* inTable, |
| int inTableSize) { |
| invert_table_gamma(nullptr, outTable, kDstGammaTableSize, inTable, inTableSize); |
| } |
| |
| static float inverse_parametric(float x, float g, float a, float b, float c, float d, float e, |
| float f) { |
| // We need to take the inverse of the following piecewise function. |
| // Y = (aX + b)^g + e for X >= d |
| // Y = cX + f otherwise |
| |
| // Assume that the gamma function is continuous, or this won't make much sense anyway. |
| // Plug in |d| to the second equation to calculate the new piecewise interval. |
| // Then simply use the inverse of the original functions. |
| float interval = c * d + f; |
| if (x < interval) { |
| // X = (Y - F) / C |
| if (0.0f == c) { |
| // The gamma curve for this segment is constant, so the inverse is undefined. |
| // Since this is the lower segment, guess zero. |
| return 0.0f; |
| } |
| |
| return (x - f) / c; |
| } |
| |
| // X = ((Y - E)^(1 / G) - B) / A |
| if (0.0f == a || 0.0f == g) { |
| // The gamma curve for this segment is constant, so the inverse is undefined. |
| // Since this is the upper segment, guess one. |
| return 1.0f; |
| } |
| |
| return (powf(x - e, 1.0f / g) - b) / a; |
| } |
| |
| static void build_table_linear_to_gamma(uint8_t* outTable, float g, float a, |
| float b, float c, float d, float e, float f) { |
| for (int i = 0; i < kDstGammaTableSize; i++) { |
| float x = ((float) i) * (1.0f / ((float) (kDstGammaTableSize - 1))); |
| float y = inverse_parametric(x, g, a, b, c, d, e, f); |
| outTable[i] = clamp_normalized_float_to_byte(y); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| template <typename T> |
| struct GammaFns { |
| const T* fSRGBTable; |
| const T* f2Dot2Table; |
| void (*fBuildFromValue)(T*, float); |
| void (*fBuildFromTable)(T*, const float*, int); |
| void (*fBuildFromParam)(T*, float, float, float, float, float, float, float); |
| }; |
| |
| static const GammaFns<float> kToLinear { |
| sk_linear_from_srgb, |
| sk_linear_from_2dot2, |
| &build_table_linear_from_gamma, |
| &build_table_linear_from_gamma, |
| &build_table_linear_from_gamma, |
| }; |
| |
| static const GammaFns<uint8_t> kFromLinear { |
| nullptr, |
| nullptr, |
| &build_table_linear_to_gamma, |
| &build_table_linear_to_gamma, |
| &build_table_linear_to_gamma, |
| }; |
| |
| // Build tables to transform src gamma to linear. |
| template <typename T> |
| static void build_gamma_tables(const T* outGammaTables[3], T* gammaTableStorage, int gammaTableSize, |
| const SkColorSpace_XYZ* space, const GammaFns<T>& fns, |
| bool gammasAreMatching) |
| { |
| switch (space->gammaNamed()) { |
| case kSRGB_SkGammaNamed: |
| outGammaTables[0] = outGammaTables[1] = outGammaTables[2] = fns.fSRGBTable; |
| break; |
| case k2Dot2Curve_SkGammaNamed: |
| outGammaTables[0] = outGammaTables[1] = outGammaTables[2] = fns.f2Dot2Table; |
| break; |
| case kLinear_SkGammaNamed: |
| outGammaTables[0] = outGammaTables[1] = outGammaTables[2] = nullptr; |
| break; |
| default: { |
| const SkGammas* gammas = space->gammas(); |
| SkASSERT(gammas); |
| |
| auto build_table = [=](int i) { |
| if (gammas->isNamed(i)) { |
| switch (gammas->data(i).fNamed) { |
| case kSRGB_SkGammaNamed: |
| (*fns.fBuildFromParam)(&gammaTableStorage[i * gammaTableSize], |
| gSRGB_TransferFn.fG, |
| gSRGB_TransferFn.fA, |
| gSRGB_TransferFn.fB, |
| gSRGB_TransferFn.fC, |
| gSRGB_TransferFn.fD, |
| gSRGB_TransferFn.fE, |
| gSRGB_TransferFn.fF); |
| outGammaTables[i] = &gammaTableStorage[i * gammaTableSize]; |
| break; |
| case k2Dot2Curve_SkGammaNamed: |
| (*fns.fBuildFromValue)(&gammaTableStorage[i * gammaTableSize], 2.2f); |
| outGammaTables[i] = &gammaTableStorage[i * gammaTableSize]; |
| break; |
| case kLinear_SkGammaNamed: |
| (*fns.fBuildFromValue)(&gammaTableStorage[i * gammaTableSize], 1.0f); |
| outGammaTables[i] = &gammaTableStorage[i * gammaTableSize]; |
| break; |
| default: |
| SkASSERT(false); |
| break; |
| } |
| } else if (gammas->isValue(i)) { |
| (*fns.fBuildFromValue)(&gammaTableStorage[i * gammaTableSize], |
| gammas->data(i).fValue); |
| outGammaTables[i] = &gammaTableStorage[i * gammaTableSize]; |
| } else if (gammas->isTable(i)) { |
| (*fns.fBuildFromTable)(&gammaTableStorage[i * gammaTableSize], gammas->table(i), |
| gammas->data(i).fTable.fSize); |
| outGammaTables[i] = &gammaTableStorage[i * gammaTableSize]; |
| } else { |
| SkASSERT(gammas->isParametric(i)); |
| const SkColorSpaceTransferFn& params = gammas->params(i); |
| (*fns.fBuildFromParam)(&gammaTableStorage[i * gammaTableSize], params.fG, |
| params.fA, params.fB, params.fC, params.fD, params.fE, |
| params.fF); |
| outGammaTables[i] = &gammaTableStorage[i * gammaTableSize]; |
| } |
| }; |
| |
| if (gammasAreMatching) { |
| build_table(0); |
| outGammaTables[1] = outGammaTables[0]; |
| outGammaTables[2] = outGammaTables[0]; |
| } else { |
| build_table(0); |
| build_table(1); |
| build_table(2); |
| } |
| |
| break; |
| } |
| } |
| } |
| |
| void SkColorSpaceXform_Base::BuildDstGammaTables(const uint8_t* dstGammaTables[3], |
| uint8_t* dstStorage, |
| const SkColorSpace_XYZ* space, |
| bool gammasAreMatching) { |
| build_gamma_tables(dstGammaTables, dstStorage, kDstGammaTableSize, space, kFromLinear, |
| gammasAreMatching); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| std::unique_ptr<SkColorSpaceXform> SkColorSpaceXform::New(SkColorSpace* src, |
| SkColorSpace* dst) { |
| return SkColorSpaceXform_Base::New(src, dst, SkTransferFunctionBehavior::kRespect); |
| } |
| |
| std::unique_ptr<SkColorSpaceXform> SkColorSpaceXform_Base::New( |
| SkColorSpace* src, |
| SkColorSpace* dst, |
| SkTransferFunctionBehavior premulBehavior) { |
| |
| if (!src || !dst) { |
| // Invalid input |
| return nullptr; |
| } |
| |
| if (!dst->toXYZD50()) { |
| SkCSXformPrintf("only XYZ destinations supported\n"); |
| return nullptr; |
| } |
| |
| if (src->toXYZD50()) { |
| return skstd::make_unique<SkColorSpaceXform_XYZ>(static_cast<SkColorSpace_XYZ*>(src), |
| static_cast<SkColorSpace_XYZ*>(dst), |
| premulBehavior); |
| } |
| return skstd::make_unique<SkColorSpaceXform_A2B>(static_cast<SkColorSpace_A2B*>(src), |
| static_cast<SkColorSpace_XYZ*>(dst)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static inline int num_tables(SkColorSpace_XYZ* space) { |
| switch (space->gammaNamed()) { |
| case kSRGB_SkGammaNamed: |
| case k2Dot2Curve_SkGammaNamed: |
| case kLinear_SkGammaNamed: |
| return 0; |
| default: { |
| const SkGammas* gammas = space->gammas(); |
| SkASSERT(gammas); |
| |
| // It's likely that each component will have the same gamma. In this case, |
| // we only need to build one table. |
| return gammas->allChannelsSame() ? 1 : 3; |
| } |
| } |
| } |
| |
| SkColorSpaceXform_XYZ::SkColorSpaceXform_XYZ(SkColorSpace_XYZ* src, |
| SkColorSpace_XYZ* dst, |
| SkTransferFunctionBehavior premulBehavior) |
| : fPremulBehavior(premulBehavior) |
| { |
| fColorSpacesAreIdentical = SkColorSpace::Equals(src, dst); |
| |
| SkMatrix44 srcToDst(SkMatrix44::kIdentity_Constructor); |
| if (!fColorSpacesAreIdentical && *src->toXYZD50() != *dst->toXYZD50()) { |
| srcToDst.setConcat(*dst->fromXYZD50(), *src->toXYZD50()); |
| } |
| |
| fSrcToDst[ 0] = srcToDst.get(0, 0); |
| fSrcToDst[ 1] = srcToDst.get(1, 0); |
| fSrcToDst[ 2] = srcToDst.get(2, 0); |
| fSrcToDst[ 3] = srcToDst.get(0, 1); |
| fSrcToDst[ 4] = srcToDst.get(1, 1); |
| fSrcToDst[ 5] = srcToDst.get(2, 1); |
| fSrcToDst[ 6] = srcToDst.get(0, 2); |
| fSrcToDst[ 7] = srcToDst.get(1, 2); |
| fSrcToDst[ 8] = srcToDst.get(2, 2); |
| fSrcToDst[ 9] = srcToDst.get(0, 3); |
| fSrcToDst[10] = srcToDst.get(1, 3); |
| fSrcToDst[11] = srcToDst.get(2, 3); |
| fSrcToDstIsIdentity = srcToDst.isIdentity(); |
| |
| const int numSrcTables = num_tables(src); |
| const size_t srcEntries = numSrcTables * 256; |
| const bool srcGammasAreMatching = (1 >= numSrcTables); |
| fSrcStorage.reset(srcEntries); |
| build_gamma_tables(fSrcGammaTables, fSrcStorage.get(), 256, src, kToLinear, |
| srcGammasAreMatching); |
| |
| const int numDstTables = num_tables(dst); |
| dst->toDstGammaTables(fDstGammaTables, &fDstStorage, numDstTables); |
| |
| if (src->gammaIsLinear()) { |
| fSrcGamma = kLinear_SrcGamma; |
| } else if (kSRGB_SkGammaNamed == src->gammaNamed()) { |
| fSrcGamma = kSRGB_SrcGamma; |
| } else { |
| fSrcGamma = kTable_SrcGamma; |
| } |
| |
| switch (dst->gammaNamed()) { |
| case kSRGB_SkGammaNamed: |
| fDstGamma = kSRGB_DstGamma; |
| break; |
| case k2Dot2Curve_SkGammaNamed: |
| fDstGamma = k2Dot2_DstGamma; |
| break; |
| case kLinear_SkGammaNamed: |
| fDstGamma = kLinear_DstGamma; |
| break; |
| default: |
| fDstGamma = kTable_DstGamma; |
| break; |
| } |
| } |
| |
| bool SkColorSpaceXform_XYZ::apply(ColorFormat dstColorFormat, void* dst, |
| ColorFormat srcColorFormat, const void* src, |
| int len, SkAlphaType alphaType) const { |
| if (fColorSpacesAreIdentical && kPremul_SkAlphaType != alphaType) { |
| if ((kRGBA_8888_ColorFormat == dstColorFormat && |
| kRGBA_8888_ColorFormat == srcColorFormat) || |
| (kBGRA_8888_ColorFormat == dstColorFormat && |
| kBGRA_8888_ColorFormat == srcColorFormat)) |
| { |
| memcpy(dst, src, len * sizeof(uint32_t)); |
| return true; |
| } |
| |
| if ((kRGBA_8888_ColorFormat == dstColorFormat && |
| kBGRA_8888_ColorFormat == srcColorFormat) || |
| (kBGRA_8888_ColorFormat == dstColorFormat && |
| kRGBA_8888_ColorFormat == srcColorFormat)) |
| { |
| SkOpts::RGBA_to_BGRA((uint32_t*)dst, src, len); |
| return true; |
| } |
| } |
| |
| SkRasterPipeline_<256> pipeline; |
| |
| SkJumper_MemoryCtx src_ctx = { (void*)src, 0 }, |
| dst_ctx = { (void*)dst, 0 }; |
| |
| SkJumper_LoadTablesCtx loadTables; |
| switch (srcColorFormat) { |
| case kRGBA_8888_ColorFormat: |
| if (kLinear_SrcGamma == fSrcGamma) { |
| pipeline.append(SkRasterPipeline::load_8888, &src_ctx); |
| } else { |
| loadTables.src = src; |
| loadTables.r = fSrcGammaTables[0]; |
| loadTables.g = fSrcGammaTables[1]; |
| loadTables.b = fSrcGammaTables[2]; |
| pipeline.append(SkRasterPipeline::load_tables, &loadTables); |
| } |
| |
| break; |
| case kBGRA_8888_ColorFormat: |
| if (kLinear_SrcGamma == fSrcGamma) { |
| pipeline.append(SkRasterPipeline::load_bgra, &src_ctx); |
| } else { |
| loadTables.src = src; |
| loadTables.r = fSrcGammaTables[2]; |
| loadTables.g = fSrcGammaTables[1]; |
| loadTables.b = fSrcGammaTables[0]; |
| pipeline.append(SkRasterPipeline::load_tables, &loadTables); |
| pipeline.append(SkRasterPipeline::swap_rb); |
| } |
| |
| break; |
| case kRGBA_F16_ColorFormat: |
| if (kLinear_SrcGamma != fSrcGamma) { |
| return false; |
| } |
| pipeline.append(SkRasterPipeline::load_f16, &src_ctx); |
| break; |
| case kRGBA_F32_ColorFormat: |
| if (kLinear_SrcGamma != fSrcGamma) { |
| return false; |
| } |
| pipeline.append(SkRasterPipeline::load_f32, &src_ctx); |
| break; |
| case kRGBA_U16_BE_ColorFormat: |
| switch (fSrcGamma) { |
| case kLinear_SrcGamma: |
| pipeline.append(SkRasterPipeline::load_u16_be, &src_ctx); |
| break; |
| case kSRGB_SrcGamma: |
| pipeline.append(SkRasterPipeline::load_u16_be, &src_ctx); |
| pipeline.append(SkRasterPipeline::from_srgb); |
| break; |
| case kTable_SrcGamma: |
| loadTables.src = src; |
| loadTables.r = fSrcGammaTables[0]; |
| loadTables.g = fSrcGammaTables[1]; |
| loadTables.b = fSrcGammaTables[2]; |
| pipeline.append(SkRasterPipeline::load_tables_u16_be, &loadTables); |
| break; |
| } |
| break; |
| case kRGB_U16_BE_ColorFormat: |
| switch (fSrcGamma) { |
| case kLinear_SrcGamma: |
| pipeline.append(SkRasterPipeline::load_rgb_u16_be, &src_ctx); |
| break; |
| case kSRGB_SrcGamma: |
| pipeline.append(SkRasterPipeline::load_rgb_u16_be, &src_ctx); |
| pipeline.append(SkRasterPipeline::from_srgb); |
| break; |
| case kTable_SrcGamma: |
| loadTables.src = src; |
| loadTables.r = fSrcGammaTables[0]; |
| loadTables.g = fSrcGammaTables[1]; |
| loadTables.b = fSrcGammaTables[2]; |
| pipeline.append(SkRasterPipeline::load_tables_rgb_u16_be, &loadTables); |
| break; |
| } |
| break; |
| default: |
| return false; |
| } |
| |
| if (!fSrcToDstIsIdentity) { |
| pipeline.append(SkRasterPipeline::matrix_3x4, fSrcToDst); |
| |
| if (kRGBA_F16_ColorFormat != dstColorFormat && |
| kRGBA_F32_ColorFormat != dstColorFormat) |
| { |
| bool need_clamp_0, need_clamp_1; |
| analyze_3x4_matrix(fSrcToDst, &need_clamp_0, &need_clamp_1); |
| |
| if (need_clamp_0) { pipeline.append(SkRasterPipeline::clamp_0); } |
| if (need_clamp_1) { pipeline.append(SkRasterPipeline::clamp_1); } |
| } |
| } |
| |
| if (kPremul_SkAlphaType == alphaType && SkTransferFunctionBehavior::kRespect == fPremulBehavior) |
| { |
| pipeline.append(SkRasterPipeline::premul); |
| } |
| |
| SkJumper_ByteTablesRGBCtx tables; |
| float to_2dot2 = 1/2.2f; |
| switch (fDstGamma) { |
| case kSRGB_DstGamma: |
| pipeline.append(SkRasterPipeline::to_srgb); |
| break; |
| case k2Dot2_DstGamma: |
| pipeline.append(SkRasterPipeline::gamma, &to_2dot2); |
| break; |
| case kTable_DstGamma: |
| tables.r = fDstGammaTables[0]; |
| tables.g = fDstGammaTables[1]; |
| tables.b = fDstGammaTables[2]; |
| tables.n = SkColorSpaceXform_Base::kDstGammaTableSize; |
| pipeline.append(SkRasterPipeline::byte_tables_rgb, &tables); |
| default: |
| break; |
| } |
| |
| if (kPremul_SkAlphaType == alphaType && SkTransferFunctionBehavior::kIgnore == fPremulBehavior) |
| { |
| pipeline.append(SkRasterPipeline::premul); |
| } |
| |
| switch (dstColorFormat) { |
| case kRGBA_8888_ColorFormat: |
| pipeline.append(SkRasterPipeline::store_8888, &dst_ctx); |
| break; |
| case kBGRA_8888_ColorFormat: |
| pipeline.append(SkRasterPipeline::store_bgra, &dst_ctx); |
| break; |
| case kRGBA_F16_ColorFormat: |
| if (kLinear_DstGamma != fDstGamma) { |
| return false; |
| } |
| pipeline.append(SkRasterPipeline::store_f16, &dst_ctx); |
| break; |
| case kRGBA_F32_ColorFormat: |
| if (kLinear_DstGamma != fDstGamma) { |
| return false; |
| } |
| pipeline.append(SkRasterPipeline::store_f32, &dst_ctx); |
| break; |
| case kBGR_565_ColorFormat: |
| if (kOpaque_SkAlphaType != alphaType) { |
| return false; |
| } |
| pipeline.append(SkRasterPipeline::store_565, &dst_ctx); |
| break; |
| default: |
| return false; |
| } |
| pipeline.run(0,0, len,1); |
| return true; |
| } |
| |
| std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace_XYZ* space) { |
| auto xform = skstd::make_unique<SkColorSpaceXform_XYZ>(space, space, |
| SkTransferFunctionBehavior::kRespect); |
| xform->pretendNotToBeIdentityForTesting(); |
| return std::move(xform); |
| } |
| |
| bool SkColorSpaceXform::Apply(SkColorSpace* dstCS, ColorFormat dstFormat, void* dst, |
| SkColorSpace* srcCS, ColorFormat srcFormat, const void* src, |
| int len, AlphaOp op) { |
| SkAlphaType at; |
| switch (op) { |
| case kPreserve_AlphaOp: at = kUnpremul_SkAlphaType; break; |
| case kPremul_AlphaOp: at = kPremul_SkAlphaType; break; |
| case kSrcIsOpaque_AlphaOp: at = kOpaque_SkAlphaType; break; |
| } |
| return New(srcCS, dstCS)->apply(dstFormat, dst, srcFormat, src, len, at); |
| } |
