| /* |
| * 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: |
| static constexpr int kDstGammaTableSize = 1024; |
| |
| protected: |
| virtual bool onApply(ColorFormat dstFormat, void* dst, ColorFormat srcFormat, const void* src, |
| int count, SkAlphaType alphaType) const = 0; |
| |
| private: |
| static void BuildDstGammaTables(const uint8_t* outGammaTables[3], uint8_t* gammaTableStorage, |
| const SkColorSpace_XYZ* space, bool gammasAreMatching); |
| |
| friend class SkColorSpaceXform; |
| friend class SkColorSpace_XYZ; |
| }; |
| |
| enum SrcGamma { |
| kLinear_SrcGamma, |
| kTable_SrcGamma, |
| }; |
| |
| enum DstGamma { |
| kLinear_DstGamma, |
| kSRGB_DstGamma, |
| k2Dot2_DstGamma, |
| kTable_DstGamma, |
| }; |
| |
| enum ColorSpaceMatch { |
| kNone_ColorSpaceMatch, |
| kGamut_ColorSpaceMatch, |
| kFull_ColorSpaceMatch, |
| }; |
| |
| template <SrcGamma kSrc, DstGamma kDst, ColorSpaceMatch kCSM> |
| class SkColorSpaceXform_XYZ : public SkColorSpaceXform_Base { |
| protected: |
| bool onApply(ColorFormat dstFormat, void* dst, ColorFormat srcFormat, const void* src, |
| int count, SkAlphaType alphaType) const override; |
| |
| private: |
| SkColorSpaceXform_XYZ(SkColorSpace_XYZ* srcSpace, const SkMatrix44& srcToDst, |
| SkColorSpace_XYZ* dstSpace); |
| |
| // Contain pointers into storage or pointers into precomputed tables. |
| const float* fSrcGammaTables[3]; |
| SkAutoTMalloc<float> fSrcStorage; |
| const uint8_t* fDstGammaTables[3]; |
| sk_sp<SkData> fDstStorage; |
| |
| float fSrcToDst[16]; |
| |
| friend class SkColorSpaceXform; |
| friend std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace_XYZ* space); |
| }; |
| |
| // For testing. Bypasses opts for when src and dst color spaces are equal. |
| std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace_XYZ* space); |
| |
| #endif |