| |
| /* |
| * 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. |
| */ |
| class SK_API SkEmptyShader : public SkShader { |
| public: |
| SkEmptyShader(); |
| |
| virtual uint32_t getFlags(); |
| virtual uint8_t getSpan16Alpha() const; |
| virtual bool setContext(const SkBitmap& device, const SkPaint& paint, |
| const SkMatrix& matrix); |
| virtual void shadeSpan(int x, int y, SkPMColor span[], int count); |
| virtual void shadeSpan16(int x, int y, uint16_t span[], int count); |
| virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count); |
| |
| protected: |
| SkEmptyShader(SkFlattenableReadBuffer&); |
| virtual Factory getFactory(); |
| virtual void flatten(SkFlattenableWriteBuffer&); |
| |
| private: |
| typedef SkShader INHERITED; |
| }; |
| |
| #endif |