| /* |
| * 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 "SkShaderBase.h" |
| #include <atomic> |
| |
| class SkArenaAlloc; |
| 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 SkShaderBase { |
| public: |
| ~SkPictureShader() override; |
| |
| static sk_sp<SkShader> Make(sk_sp<SkPicture>, TileMode, TileMode, const SkMatrix*, |
| const SkRect*); |
| |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader) |
| |
| #if SK_SUPPORT_GPU |
| std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override; |
| #endif |
| |
| protected: |
| SkPictureShader(SkReadBuffer&); |
| void flatten(SkWriteBuffer&) const override; |
| bool onAppendStages(const StageRec&) const override; |
| Context* onMakeContext(const ContextRec&, SkArenaAlloc*) const override; |
| sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override; |
| |
| private: |
| SkPictureShader(sk_sp<SkPicture>, TileMode, TileMode, const SkMatrix*, const SkRect*, |
| sk_sp<SkColorSpace>); |
| |
| sk_sp<SkShader> refBitmapShader(const SkMatrix&, SkTCopyOnFirstWrite<SkMatrix>* localMatrix, |
| SkColorSpace* dstColorSpace, |
| const int maxTextureSize = 0) const; |
| |
| class PictureShaderContext : public Context { |
| public: |
| PictureShaderContext( |
| const SkPictureShader&, const ContextRec&, sk_sp<SkShader> bitmapShader, SkArenaAlloc*); |
| |
| uint32_t getFlags() const override; |
| |
| void shadeSpan(int x, int y, SkPMColor dstC[], int count) override; |
| |
| sk_sp<SkShader> fBitmapShader; |
| SkShaderBase::Context* fBitmapShaderContext; |
| void* fBitmapShaderContextStorage; |
| |
| typedef Context INHERITED; |
| }; |
| |
| sk_sp<SkPicture> fPicture; |
| SkRect fTile; |
| TileMode fTmx, fTmy; |
| |
| // Should never be set by a public constructor. This is only used when onMakeColorSpace() |
| // forces a deferred color space xform. |
| sk_sp<SkColorSpace> fColorSpace; |
| |
| const uint32_t fUniqueID; |
| mutable std::atomic<bool> fAddedToCache; |
| |
| typedef SkShaderBase INHERITED; |
| }; |
| |
| #endif // SkPictureShader_DEFINED |