1 2 /* 3 * Copyright 2007 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #ifndef SkColorShader_DEFINED 11 #define SkColorShader_DEFINED 12 13 #include "SkShader.h" 14 15 /** \class SkColorShader 16 A Shader that represents a single color. In general, this effect can be 17 accomplished by just using the color field on the paint, but if an 18 actual shader object is needed, this provides that feature. 19 */ 20 class SK_API SkColorShader : public SkShader { 21 public: 22 /** Create a ColorShader that will inherit its color from the Paint 23 at draw time. 24 */ 25 SkColorShader(); 26 27 /** Create a ColorShader that ignores the color in the paint, and uses the 28 specified color. Note: like all shaders, at draw time the paint's alpha 29 will be respected, and is applied to the specified color. 30 */ 31 SkColorShader(SkColor c); 32 33 virtual ~SkColorShader(); 34 35 virtual uint32_t getFlags() SK_OVERRIDE; 36 virtual uint8_t getSpan16Alpha() const SK_OVERRIDE; 37 virtual bool isOpaque() const SK_OVERRIDE; 38 virtual bool setContext(const SkBitmap& device, const SkPaint& paint, 39 const SkMatrix& matrix) SK_OVERRIDE; 40 virtual void shadeSpan(int x, int y, SkPMColor span[], int count) SK_OVERRIDE; 41 virtual void shadeSpan16(int x, int y, uint16_t span[], int count) SK_OVERRIDE; 42 virtual void shadeSpanAlpha(int x, int y, uint8_t alpha[], int count) SK_OVERRIDE; 43 44 // we return false for this, use asAGradient 45 virtual BitmapType asABitmap(SkBitmap* outTexture, 46 SkMatrix* outMatrix, 47 TileMode xy[2], 48 SkScalar* twoPointRadialParams) const SK_OVERRIDE; 49 50 virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE; 51 52 protected: 53 SkColorShader(SkFlattenableReadBuffer&); 54 55 virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE; 56 virtual Factory getFactory() SK_OVERRIDE; 57 58 private: 59 static SkFlattenable* CreateProc(SkFlattenableReadBuffer&); 60 61 SkColor fColor; // ignored if fInheritColor is true 62 SkPMColor fPMColor; // cached after setContext() 63 uint32_t fFlags; // cached after setContext() 64 uint16_t fColor16; // cached after setContext() 65 SkBool8 fInheritColor; 66 67 typedef SkShader INHERITED; 68 }; 69 70 #endif 71
