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: #ifndef SkTransparentShader_DEFINED
michael@0: #define SkTransparentShader_DEFINED
michael@0: 
michael@0: #include "SkShader.h"
michael@0: 
michael@0: class SK_API SkTransparentShader : public SkShader {
michael@0: public:
michael@0:     SkTransparentShader() {}
michael@0: 
michael@0:     virtual uint32_t getFlags() SK_OVERRIDE;
michael@0:     virtual bool    setContext(const SkBitmap& device,
michael@0:                                const SkPaint& paint,
michael@0:                                const SkMatrix& matrix) SK_OVERRIDE;
michael@0:     virtual void    shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE;
michael@0:     virtual void    shadeSpan16(int x, int y, uint16_t span[], int count) SK_OVERRIDE;
michael@0: 
michael@0:     SK_TO_STRING_OVERRIDE()
michael@0:     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTransparentShader)
michael@0: 
michael@0: private:
michael@0:     // these are a cache from the call to setContext()
michael@0:     const SkBitmap* fDevice;
michael@0:     uint8_t         fAlpha;
michael@0: 
michael@0:     SkTransparentShader(SkReadBuffer& buffer) : INHERITED(buffer) {}
michael@0: 
michael@0:     typedef SkShader INHERITED;
michael@0: };
michael@0: 
michael@0: #endif