ba28d03e94
Review URL: https://codereview.appspot.com/5909063 git-svn-id: http://skia.googlecode.com/svn/trunk@3494 2bbb7eff-a529-9590-31e7-b0007b416f81
44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
|
|
/*
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
|
|
|
|
#ifndef SkEmptyShader_DEFINED
|
|
#define SkEmptyShader_DEFINED
|
|
|
|
#include "SkShader.h"
|
|
|
|
/**
|
|
* \class SkEmptyShader
|
|
* A Shader that always draws nothing. Its setContext always returns false,
|
|
* so it never expects that its shadeSpan() methods will get called.
|
|
*/
|
|
class SK_API SkEmptyShader : public SkShader {
|
|
public:
|
|
SkEmptyShader() {}
|
|
|
|
virtual uint32_t getFlags() SK_OVERRIDE;
|
|
virtual uint8_t getSpan16Alpha() const SK_OVERRIDE;
|
|
virtual bool setContext(const SkBitmap&, const SkPaint&,
|
|
const SkMatrix&) SK_OVERRIDE;
|
|
virtual void shadeSpan(int x, int y, SkPMColor span[], int count) SK_OVERRIDE;
|
|
virtual void shadeSpan16(int x, int y, uint16_t span[], int count) SK_OVERRIDE;
|
|
virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) SK_OVERRIDE;
|
|
|
|
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkEmptyShader)
|
|
|
|
protected:
|
|
SkEmptyShader(SkFlattenableReadBuffer&);
|
|
virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
|
|
|
|
private:
|
|
typedef SkShader INHERITED;
|
|
};
|
|
|
|
#endif
|