| /* |
| * 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 SkBitmapProcShader_DEFINED |
| #define SkBitmapProcShader_DEFINED |
| |
| #include "SkShader.h" |
| #include "SkSmallAllocator.h" |
| |
| struct SkBitmapProcState; |
| class SkBitmapProvider; |
| |
| class SkBitmapProcShader : public SkShader { |
| public: |
| SkBitmapProcShader(const SkBitmap& src, TileMode tx, TileMode ty, |
| const SkMatrix* localMatrix = nullptr); |
| |
| bool isOpaque() const override; |
| |
| // SkBitmapProcShader stores bitmap coordinates in a 16bit buffer, as it |
| // communicates between its matrix-proc and its sampler-proc. Until we can |
| // widen that, we have to reject bitmaps that are larger. |
| static bool BitmapIsTooBig(const SkBitmap&); |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapProcShader) |
| |
| #if SK_SUPPORT_GPU |
| sk_sp<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override; |
| #endif |
| |
| protected: |
| void flatten(SkWriteBuffer&) const override; |
| size_t onContextSize(const ContextRec& rec) const override { |
| return ContextSize(rec, fRawBitmap.info()); |
| } |
| Context* onCreateContext(const ContextRec&, void* storage) const override; |
| bool onIsABitmap(SkBitmap*, SkMatrix*, TileMode*) const override; |
| |
| SkBitmap fRawBitmap; |
| uint8_t fTileModeX, fTileModeY; |
| |
| private: |
| friend class SkImageShader; |
| |
| static size_t ContextSize(const ContextRec&, const SkImageInfo& srcInfo); |
| static Context* MakeContext(const SkShader&, TileMode tmx, TileMode tmy, |
| const SkBitmapProvider&, const ContextRec&, void* storage); |
| |
| typedef SkShader INHERITED; |
| }; |
| |
| enum {kSkBlitterContextSize = 3332}; |
| |
| // Commonly used allocator. It currently is only used to allocate up to 3 objects. The total |
| // bytes requested is calculated using one of our large shaders, its context size plus the size of |
| // an Sk3DBlitter in SkDraw.cpp |
| // Note that some contexts may contain other contexts (e.g. for compose shaders), but we've not |
| // yet found a situation where the size below isn't big enough. |
| typedef SkSmallAllocator<3, kSkBlitterContextSize> SkTBlitterAllocator; |
| |
| // If alloc is non-nullptr, it will be used to allocate the returned SkShader, and MUST outlive |
| // the SkShader. |
| sk_sp<SkShader> SkMakeBitmapShader(const SkBitmap& src, SkShader::TileMode, SkShader::TileMode, |
| const SkMatrix* localMatrix, SkTBlitterAllocator* alloc); |
| |
| #endif |