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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkCoreBlitters_DEFINED
#define SkCoreBlitters_DEFINED
#include "SkBitmapProcShader.h"
#include "SkBlitter.h"
#include "SkBlitRow.h"
#include "SkPaint.h"
#include "SkShaderBase.h"
#include "SkXfermodePriv.h"
class SkRasterBlitter : public SkBlitter {
public:
SkRasterBlitter(const SkPixmap& device) : fDevice(device) {}
protected:
const SkPixmap fDevice;
private:
typedef SkBlitter INHERITED;
};
class SkShaderBlitter : public SkRasterBlitter {
public:
/**
* The storage for shaderContext is owned by the caller, but the object itself is not.
* The blitter only ensures that the storage always holds a live object, but it may
* exchange that object.
*/
SkShaderBlitter(const SkPixmap& device, const SkPaint& paint,
SkShaderBase::Context* shaderContext);
virtual ~SkShaderBlitter();
protected:
uint32_t fShaderFlags;
const SkShader* fShader;
SkShaderBase::Context* fShaderContext;
bool fConstInY;
private:
// illegal
SkShaderBlitter& operator=(const SkShaderBlitter&);
typedef SkRasterBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class SkA8_Coverage_Blitter : public SkRasterBlitter {
public:
SkA8_Coverage_Blitter(const SkPixmap& device, const SkPaint& paint);
void blitH(int x, int y, int width) override;
void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override;
void blitV(int x, int y, int height, SkAlpha alpha) override;
void blitRect(int x, int y, int width, int height) override;
void blitMask(const SkMask&, const SkIRect&) override;
const SkPixmap* justAnOpaqueColor(uint32_t*) override;
private:
typedef SkRasterBlitter INHERITED;
};
////////////////////////////////////////////////////////////////
class SkARGB32_Blitter : public SkRasterBlitter {
public:
SkARGB32_Blitter(const SkPixmap& device, const SkPaint& paint);
void blitH(int x, int y, int width) override;
void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override;
void blitV(int x, int y, int height, SkAlpha alpha) override;
void blitRect(int x, int y, int width, int height) override;
void blitMask(const SkMask&, const SkIRect&) override;
const SkPixmap* justAnOpaqueColor(uint32_t*) override;
void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override;
void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override;
protected:
SkColor fColor;
SkPMColor fPMColor;
private:
unsigned fSrcA, fSrcR, fSrcG, fSrcB;
// illegal
SkARGB32_Blitter& operator=(const SkARGB32_Blitter&);
typedef SkRasterBlitter INHERITED;
};
class SkARGB32_Opaque_Blitter : public SkARGB32_Blitter {
public:
SkARGB32_Opaque_Blitter(const SkPixmap& device, const SkPaint& paint)
: INHERITED(device, paint) { SkASSERT(paint.getAlpha() == 0xFF); }
void blitMask(const SkMask&, const SkIRect&) override;
void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override;
void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override;
private:
typedef SkARGB32_Blitter INHERITED;
};
class SkARGB32_Black_Blitter : public SkARGB32_Opaque_Blitter {
public:
SkARGB32_Black_Blitter(const SkPixmap& device, const SkPaint& paint)
: INHERITED(device, paint) {}
void blitAntiH(int x, int y, const SkAlpha antialias[], const int16_t runs[]) override;
void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) override;
void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) override;
private:
typedef SkARGB32_Opaque_Blitter INHERITED;
};
class SkARGB32_Shader_Blitter : public SkShaderBlitter {
public:
SkARGB32_Shader_Blitter(const SkPixmap& device, const SkPaint& paint,
SkShaderBase::Context* shaderContext);
~SkARGB32_Shader_Blitter() override;
void blitH(int x, int y, int width) override;
void blitV(int x, int y, int height, SkAlpha alpha) override;
void blitRect(int x, int y, int width, int height) override;
void blitAntiH(int x, int y, const SkAlpha[], const int16_t[]) override;
void blitMask(const SkMask&, const SkIRect&) override;
private:
SkXfermode* fXfermode;
SkPMColor* fBuffer;
SkBlitRow::Proc32 fProc32;
SkBlitRow::Proc32 fProc32Blend;
bool fShadeDirectlyIntoDevice;
// illegal
SkARGB32_Shader_Blitter& operator=(const SkARGB32_Shader_Blitter&);
typedef SkShaderBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////////////////////////
typedef void (*SkS32D16BlendProc)(uint16_t*, const SkPMColor*, int, uint8_t);
class SkRGB565_Shader_Blitter : public SkShaderBlitter {
public:
SkRGB565_Shader_Blitter(const SkPixmap& device, const SkPaint&, SkShaderBase::Context*);
~SkRGB565_Shader_Blitter() override;
void blitH(int x, int y, int width) override;
void blitAntiH(int x, int y, const SkAlpha[], const int16_t[]) override;
static bool Supports(const SkPixmap& device, const SkPaint&);
private:
SkPMColor* fBuffer;
SkS32D16BlendProc fBlend;
SkS32D16BlendProc fBlendCoverage;
typedef SkShaderBlitter INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
// Neither of these ever returns nullptr, but this first factory may return a SkNullBlitter.
SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap&, const SkPaint&, const SkMatrix& ctm,
SkArenaAlloc*);
// Use this if you've pre-baked a shader pipeline, including modulating with paint alpha.
// This factory never returns an SkNullBlitter.
SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap&, const SkPaint&,
const SkRasterPipeline& shaderPipeline,
bool shader_is_opaque,
SkArenaAlloc*);
#endif
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