1 2 /* 3 * Copyright 2011 Google Inc. 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 #ifndef SkProxyCanvas_DEFINED 9 #define SkProxyCanvas_DEFINED 10 11 #include "SkCanvas.h" 12 13 /** This class overrides all virtual methods on SkCanvas, and redirects them 14 to a "proxy", another SkCanvas instance. It can be the basis for 15 intercepting (and possibly modifying) calls to a canvas. 16 17 There must be a proxy installed before the proxycanvas can be used (i.e. 18 before its virtual methods can be called). 19 */ 20 class SkProxyCanvas : public SkCanvas { 21 public: 22 SkProxyCanvas() : fProxy(NULL) {} 23 SkProxyCanvas(SkCanvas* proxy); 24 virtual ~SkProxyCanvas(); 25 26 SkCanvas* getProxy() const { return fProxy; } 27 void setProxy(SkCanvas* proxy); 28 29 virtual int save(SaveFlags flags = kMatrixClip_SaveFlag) SK_OVERRIDE; 30 virtual int saveLayer(const SkRect* bounds, const SkPaint* paint, 31 SaveFlags flags = kARGB_ClipLayer_SaveFlag) SK_OVERRIDE; 32 virtual void restore() SK_OVERRIDE; 33 34 virtual bool translate(SkScalar dx, SkScalar dy) SK_OVERRIDE; 35 virtual bool scale(SkScalar sx, SkScalar sy) SK_OVERRIDE; 36 virtual bool rotate(SkScalar degrees) SK_OVERRIDE; 37 virtual bool skew(SkScalar sx, SkScalar sy) SK_OVERRIDE; 38 virtual bool concat(const SkMatrix& matrix) SK_OVERRIDE; 39 virtual void setMatrix(const SkMatrix& matrix) SK_OVERRIDE; 40 41 virtual bool clipRect(const SkRect&, SkRegion::Op, bool) SK_OVERRIDE; 42 virtual bool clipPath(const SkPath&, SkRegion::Op, bool) SK_OVERRIDE; 43 virtual bool clipRegion(const SkRegion& deviceRgn, 44 SkRegion::Op op = SkRegion::kIntersect_Op) SK_OVERRIDE; 45 46 virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE; 47 virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], 48 const SkPaint& paint) SK_OVERRIDE; 49 virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE; 50 virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE; 51 virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 52 const SkPaint* paint = NULL) SK_OVERRIDE; 53 virtual void drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, 54 const SkRect& dst, const SkPaint* paint = NULL) SK_OVERRIDE; 55 virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m, 56 const SkPaint* paint = NULL) SK_OVERRIDE; 57 virtual void drawSprite(const SkBitmap& bitmap, int left, int top, 58 const SkPaint* paint = NULL) SK_OVERRIDE; 59 virtual void drawText(const void* text, size_t byteLength, SkScalar x, 60 SkScalar y, const SkPaint& paint) SK_OVERRIDE; 61 virtual void drawPosText(const void* text, size_t byteLength, 62 const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE; 63 virtual void drawPosTextH(const void* text, size_t byteLength, 64 const SkScalar xpos[], SkScalar constY, 65 const SkPaint& paint) SK_OVERRIDE; 66 virtual void drawTextOnPath(const void* text, size_t byteLength, 67 const SkPath& path, const SkMatrix* matrix, 68 const SkPaint& paint) SK_OVERRIDE; 69 virtual void drawPicture(SkPicture&) SK_OVERRIDE; 70 virtual void drawVertices(VertexMode vmode, int vertexCount, 71 const SkPoint vertices[], const SkPoint texs[], 72 const SkColor colors[], SkXfermode* xmode, 73 const uint16_t indices[], int indexCount, 74 const SkPaint& paint) SK_OVERRIDE; 75 virtual void drawData(const void* data, size_t length) SK_OVERRIDE; 76 77 virtual SkBounder* setBounder(SkBounder* bounder) SK_OVERRIDE; 78 virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE; 79 80 private: 81 SkCanvas* fProxy; 82 83 typedef SkCanvas INHERITED; 84 }; 85 86 #endif 87
