michael@0: 
michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef SkBitmapProcShader_DEFINED
michael@0: #define SkBitmapProcShader_DEFINED
michael@0: 
michael@0: #include "SkShader.h"
michael@0: #include "SkBitmapProcState.h"
michael@0: #include "SkSmallAllocator.h"
michael@0: 
michael@0: class SkBitmapProcShader : public SkShader {
michael@0: public:
michael@0:     SkBitmapProcShader(const SkBitmap& src, TileMode tx, TileMode ty);
michael@0: 
michael@0:     // overrides from SkShader
michael@0:     virtual bool isOpaque() const SK_OVERRIDE;
michael@0:     virtual bool setContext(const SkBitmap&, const SkPaint&, const SkMatrix&) SK_OVERRIDE;
michael@0:     virtual void endContext() SK_OVERRIDE;
michael@0:     virtual uint32_t getFlags() SK_OVERRIDE { return fFlags; }
michael@0:     virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE;
michael@0:     virtual ShadeProc asAShadeProc(void** ctx) SK_OVERRIDE;
michael@0:     virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE;
michael@0:     virtual BitmapType asABitmap(SkBitmap*, SkMatrix*, TileMode*) const SK_OVERRIDE;
michael@0: 
michael@0:     static bool CanDo(const SkBitmap&, TileMode tx, TileMode ty);
michael@0: 
michael@0:     SK_TO_STRING_OVERRIDE()
michael@0:     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBitmapProcShader)
michael@0: 
michael@0: #if SK_SUPPORT_GPU
michael@0:     GrEffectRef* asNewEffect(GrContext*, const SkPaint&) const SK_OVERRIDE;
michael@0: #endif
michael@0: 
michael@0: protected:
michael@0:     SkBitmapProcShader(SkReadBuffer& );
michael@0:     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
michael@0: 
michael@0:     SkBitmap          fRawBitmap;   // experimental for RLE encoding
michael@0:     SkBitmapProcState fState;
michael@0:     uint32_t          fFlags;
michael@0: 
michael@0: private:
michael@0:     typedef SkShader INHERITED;
michael@0: };
michael@0: 
michael@0: // Commonly used allocator. It currently is only used to allocate up to 2 objects. The total
michael@0: // bytes requested is calculated using one of our large shaders plus the size of an Sk3DBlitter
michael@0: // in SkDraw.cpp
michael@0: typedef SkSmallAllocator<2, sizeof(SkBitmapProcShader) + sizeof(void*) * 2> SkTBlitterAllocator;
michael@0: 
michael@0: // If alloc is non-NULL, it will be used to allocate the returned SkShader, and MUST outlive
michael@0: // the SkShader.
michael@0: SkShader* CreateBitmapShader(const SkBitmap& src, SkShader::TileMode, SkShader::TileMode,
michael@0:                              SkTBlitterAllocator* alloc);
michael@0: 
michael@0: #endif