| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SkColorShader_DEFINED |
| #define SkColorShader_DEFINED |
| |
| #include "SkShader.h" |
| |
| /** \class SkColorShader |
| A Shader that represents a single color. In general, this effect can be |
| accomplished by just using the color field on the paint, but if an |
| actual shader object is needed, this provides that feature. |
| */ |
| class SkColorShader : public SkShader { |
| public: |
| /** Create a ColorShader that will inherit its color from the Paint |
| at draw time. |
| */ |
| SkColorShader(); |
| |
| /** Create a ColorShader that ignores the color in the paint, and uses the |
| specified color. Note: like all shaders, at draw time the paint's alpha |
| will be respected, and is applied to the specified color. |
| */ |
| SkColorShader(SkColor c); |
| |
| virtual ~SkColorShader(); |
| |
| virtual uint32_t getFlags() { return fFlags; } |
| 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); |
| |
| virtual BitmapType asABitmap(SkBitmap* outTexture, |
| SkMatrix* outMatrix, |
| TileMode xy[2], |
| SkScalar* twoPointRadialParams); |
| |
| virtual GradientType asAGradient(GradientInfo* info) const; |
| |
| protected: |
| SkColorShader(SkFlattenableReadBuffer& ); |
| virtual void flatten(SkFlattenableWriteBuffer& ); |
| virtual Factory getFactory() { return CreateProc; } |
| private: |
| static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| return SkNEW_ARGS(SkColorShader, (buffer)); |
| } |
| SkColor fColor; // ignored if fInheritColor is true |
| SkPMColor fPMColor; // cached after setContext() |
| uint32_t fFlags; // cached after setContext() |
| uint16_t fColor16; // cached after setContext() |
| SkBool8 fInheritColor; |
| |
| // deferred allocation, used for asABitmap() |
| SkPixelRef* fAsABitmapPixelRef; |
| |
| typedef SkShader INHERITED; |
| }; |
| |
| #endif |