1 #ifndef SkProxyCanvas_DEFINED 2 #define SkProxyCanvas_DEFINED 3 4 #include "SkCanvas.h" 5 6 /** This class overrides all virtual methods on SkCanvas, and redirects them 7 to a "proxy", another SkCanvas instance. It can be the basis for 8 intercepting (and possibly modifying) calls to a canvas. 9 10 There must be a proxy installed before the proxycanvas can be used (i.e. 11 before its virtual methods can be called). 12 */ 13 class SkProxyCanvas : public SkCanvas { 14 public: 15 SkProxyCanvas() : fProxy(NULL) {} 16 SkProxyCanvas(SkCanvas* proxy); 17 virtual ~SkProxyCanvas(); 18 19 SkCanvas* getProxy() const { return fProxy; } 20 void setProxy(SkCanvas* proxy); 21 22 // overrides from SkCanvas 23 24 virtual bool getViewport(SkIPoint* size) const; 25 virtual bool setViewport(int x, int y); 26 27 virtual SkDevice* setBitmapDevice(const SkBitmap& bitmap); 28 29 virtual int save(SaveFlags flags = kMatrixClip_SaveFlag); 30 virtual int saveLayer(const SkRect* bounds, const SkPaint* paint, 31 SaveFlags flags = kARGB_ClipLayer_SaveFlag); 32 virtual void restore(); 33 34 virtual bool translate(SkScalar dx, SkScalar dy); 35 virtual bool scale(SkScalar sx, SkScalar sy); 36 virtual bool rotate(SkScalar degrees); 37 virtual bool skew(SkScalar sx, SkScalar sy); 38 virtual bool concat(const SkMatrix& matrix); 39 virtual void setMatrix(const SkMatrix& matrix); 40 41 virtual bool clipRect(const SkRect& rect, 42 SkRegion::Op op = SkRegion::kIntersect_Op); 43 virtual bool clipPath(const SkPath& path, 44 SkRegion::Op op = SkRegion::kIntersect_Op); 45 virtual bool clipRegion(const SkRegion& deviceRgn, 46 SkRegion::Op op = SkRegion::kIntersect_Op); 47 48 virtual void drawPaint(const SkPaint& paint); 49 virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], 50 const SkPaint& paint); 51 virtual void drawRect(const SkRect& rect, const SkPaint& paint); 52 virtual void drawPath(const SkPath& path, const SkPaint& paint); 53 virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 54 const SkPaint* paint = NULL); 55 virtual void drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, 56 const SkRect& dst, const SkPaint* paint = NULL); 57 virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m, 58 const SkPaint* paint = NULL); 59 virtual void drawSprite(const SkBitmap& bitmap, int left, int top, 60 const SkPaint* paint = NULL); 61 virtual void drawText(const void* text, size_t byteLength, SkScalar x, 62 SkScalar y, const SkPaint& paint); 63 virtual void drawPosText(const void* text, size_t byteLength, 64 const SkPoint pos[], const SkPaint& paint); 65 virtual void drawPosTextH(const void* text, size_t byteLength, 66 const SkScalar xpos[], SkScalar constY, 67 const SkPaint& paint); 68 virtual void drawTextOnPath(const void* text, size_t byteLength, 69 const SkPath& path, const SkMatrix* matrix, 70 const SkPaint& paint); 71 virtual void drawPicture(SkPicture&); 72 virtual void drawShape(SkShape*); 73 virtual void drawVertices(VertexMode vmode, int vertexCount, 74 const SkPoint vertices[], const SkPoint texs[], 75 const SkColor colors[], SkXfermode* xmode, 76 const uint16_t indices[], int indexCount, 77 const SkPaint& paint); 78 virtual void drawData(const void* data, size_t length); 79 80 virtual SkBounder* setBounder(SkBounder* bounder); 81 virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter); 82 83 virtual SkDevice* createDevice(SkBitmap::Config, int width, int height, 84 bool isOpaque, bool isForLayer); 85 86 private: 87 SkCanvas* fProxy; 88 89 typedef SkCanvas INHERITED; 90 }; 91 92 #endif 93
