| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkColorSpaceXform_Base_DEFINED |
| #define SkColorSpaceXform_Base_DEFINED |
| |
| #include "SkColorSpace.h" |
| #include "SkColorSpace_Base.h" |
| #include "SkColorSpaceXform.h" |
| #include "SkResourceCache.h" |
| |
| class SkColorSpace_XYZ; |
| |
| class SkColorSpaceXform_Base : public SkColorSpaceXform { |
| public: |
| // A somewhat more powerful SkColorSpaceXform::New() that allows tweaking premulBehavior. |
| static std::unique_ptr<SkColorSpaceXform> New(SkColorSpace* srcSpace, |
| SkColorSpace* dstSpace, |
| SkTransferFunctionBehavior premulBehavior); |
| |
| static constexpr int kDstGammaTableSize = 1024; |
| static void BuildDstGammaTables(const uint8_t* outGammaTables[3], |
| uint8_t* gammaTableStorage, |
| const SkColorSpace_XYZ* space, |
| bool gammasAreMatching); |
| |
| virtual bool onApply(ColorFormat dstFormat, void* dst, ColorFormat srcFormat, const void* src, |
| int count, SkAlphaType alphaType) const = 0; |
| }; |
| |
| enum SrcGamma { |
| kLinear_SrcGamma, |
| kTable_SrcGamma, |
| kSRGB_SrcGamma, |
| }; |
| |
| enum DstGamma { |
| kLinear_DstGamma, |
| kSRGB_DstGamma, |
| k2Dot2_DstGamma, |
| kTable_DstGamma, |
| }; |
| |
| class SkColorSpaceXform_XYZ : public SkColorSpaceXform_Base { |
| public: |
| SkColorSpaceXform_XYZ(SkColorSpace_XYZ* src, SkColorSpace_XYZ* dst, SkTransferFunctionBehavior); |
| |
| bool onApply(ColorFormat dstFormat, void* dst, |
| ColorFormat srcFormat, const void* src, |
| int count, SkAlphaType alphaType) const override; |
| |
| void pretendNotToBeIdentityForTesting() { |
| fSrcToDstIsIdentity = false; |
| } |
| |
| private: |
| // These tables pointers may point into fSrcStorage/fDstStorage or into pre-baked tables. |
| const float* fSrcGammaTables[3]; |
| const uint8_t* fDstGammaTables[3]; |
| SkAutoTMalloc<float> fSrcStorage; |
| sk_sp<SkData> fDstStorage; |
| |
| float fSrcToDst[12]; |
| bool fSrcToDstIsIdentity; |
| bool fColorSpacesAreIdentical; |
| SrcGamma fSrcGamma; |
| DstGamma fDstGamma; |
| SkTransferFunctionBehavior fPremulBehavior; |
| }; |
| |
| struct LoadTablesContext { |
| const void* fSrc; |
| const float* fR; |
| const float* fG; |
| const float* fB; |
| }; |
| |
| // Must be kept in sync with "Tables" struct in RasterPipeline_opts byte_tables_rgb. |
| struct TablesContext { |
| const uint8_t* fR; |
| const uint8_t* fG; |
| const uint8_t* fB; |
| int fCount; |
| }; |
| |
| // For testing. Bypasses opts for when src and dst color spaces are equal. |
| std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace_XYZ* space); |
| |
| #endif |