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/*
* 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);
};
struct LoadTablesContext {
const uint32_t* fSrc;
const float* fR;
const float* fG;
const float* fB;
};
struct StoreTablesContext {
uint32_t* fDst;
const uint8_t* fR;
const uint8_t* fG;
const uint8_t* fB;
int fCount;
};
class SkColorSpaceXform_Pipeline : public SkColorSpaceXform_Base {
protected:
virtual bool onApply(ColorFormat dstFormat, void* dst, ColorFormat srcFormat, const void* src,
int count, SkAlphaType alphaType) const;
private:
SkColorSpaceXform_Pipeline(SkColorSpace_XYZ* srcSpace, const SkMatrix44& srcToDst,
SkColorSpace_XYZ* dstSpace, ColorSpaceMatch csm, SrcGamma srcGamma,
DstGamma dstGamma);
// 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[12];
ColorSpaceMatch fCSM;
SrcGamma fSrcGamma;
DstGamma fDstGamma;
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
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