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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPictureShader_DEFINED
#define SkPictureShader_DEFINED
#include "SkShader.h"
class SkBitmap;
class SkPicture;
/*
* An SkPictureShader can be used to draw SkPicture-based patterns.
*
* The SkPicture is first rendered into a tile, which is then used to shade the area according
* to specified tiling rules.
*/
class SkPictureShader : public SkShader {
public:
static sk_sp<SkShader> Make(sk_sp<SkPicture>, TileMode, TileMode, const SkMatrix*,
const SkRect*);
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader)
#if SK_SUPPORT_GPU
sk_sp<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override;
#endif
protected:
SkPictureShader(SkReadBuffer&);
void flatten(SkWriteBuffer&) const override;
size_t onContextSize(const ContextRec&) const override;
Context* onCreateContext(const ContextRec&, void* storage) const override;
bool onAppendStages(SkRasterPipeline*, SkColorSpace*, SkArenaAlloc*,
const SkMatrix&, const SkPaint&, const SkMatrix*) const override;
private:
SkPictureShader(sk_sp<SkPicture>, TileMode, TileMode, const SkMatrix*, const SkRect*);
sk_sp<SkShader> refBitmapShader(const SkMatrix&, const SkMatrix* localMatrix,
SkColorSpace* dstColorSpace,
const int maxTextureSize = 0) const;
sk_sp<SkPicture> fPicture;
SkRect fTile;
TileMode fTmx, fTmy;
class PictureShaderContext : public SkShader::Context {
public:
static Context* Create(void* storage, const SkPictureShader&, const ContextRec&,
sk_sp<SkShader> bitmapShader);
virtual ~PictureShaderContext();
uint32_t getFlags() const override;
ShadeProc asAShadeProc(void** ctx) override;
void shadeSpan(int x, int y, SkPMColor dstC[], int count) override;
private:
PictureShaderContext(const SkPictureShader&, const ContextRec&,
sk_sp<SkShader> bitmapShader);
sk_sp<SkShader> fBitmapShader;
SkShader::Context* fBitmapShaderContext;
void* fBitmapShaderContextStorage;
typedef SkShader::Context INHERITED;
};
typedef SkShader INHERITED;
};
#endif // SkPictureShader_DEFINED
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