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/*
* 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 SkTransparentShader_DEFINED
#define SkTransparentShader_DEFINED
#include "SkShader.h"
class SK_API SkTransparentShader : public SkShader {
public:
SkTransparentShader() {}
virtual size_t contextSize() const SK_OVERRIDE;
class TransparentShaderContext : public SkShader::Context {
public:
TransparentShaderContext(const SkTransparentShader& shader, const ContextRec&);
virtual ~TransparentShaderContext();
virtual uint32_t getFlags() const SK_OVERRIDE;
virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE;
virtual void shadeSpan16(int x, int y, uint16_t span[], int count) SK_OVERRIDE;
private:
const SkBitmap* fDevice;
typedef SkShader::Context INHERITED;
};
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTransparentShader)
protected:
virtual Context* onCreateContext(const ContextRec&, void* storage) const SK_OVERRIDE;
// we don't need to flatten anything at all
virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE {}
private:
#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
SkTransparentShader(SkReadBuffer& buffer) : INHERITED(buffer) {}
#endif
typedef SkShader INHERITED;
};
#endif
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