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 SK_API 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 clipRRect(const SkRRect&, SkRegion::Op, bool) SK_OVERRIDE; 43 virtual bool clipPath(const SkPath&, SkRegion::Op, bool) SK_OVERRIDE; 44 virtual bool clipRegion(const SkRegion& deviceRgn, 45 SkRegion::Op op = SkRegion::kIntersect_Op) SK_OVERRIDE; 46 47 virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE; 48 virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[], 49 const SkPaint& paint) SK_OVERRIDE; 50 virtual void drawOval(const SkRect&, const SkPaint& paint) SK_OVERRIDE; 51 virtual void drawRect(const SkRect&, const SkPaint& paint) SK_OVERRIDE; 52 virtual void drawRRect(const SkRRect&, const SkPaint& paint) SK_OVERRIDE; 53 virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE; 54 virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top, 55 const SkPaint* paint = NULL) SK_OVERRIDE; 56 virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, 57 const SkRect& dst, const SkPaint* paint, 58 DrawBitmapRectFlags flags) SK_OVERRIDE; 59 virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m, 60 const SkPaint* paint = NULL) SK_OVERRIDE; 61 virtual void drawSprite(const SkBitmap& bitmap, int left, int top, 62 const SkPaint* paint = NULL) SK_OVERRIDE; 63 virtual void drawText(const void* text, size_t byteLength, SkScalar x, 64 SkScalar y, const SkPaint& paint) SK_OVERRIDE; 65 virtual void drawPosText(const void* text, size_t byteLength, 66 const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE; 67 virtual void drawPosTextH(const void* text, size_t byteLength, 68 const SkScalar xpos[], SkScalar constY, 69 const SkPaint& paint) SK_OVERRIDE; 70 virtual void drawTextOnPath(const void* text, size_t byteLength, 71 const SkPath& path, const SkMatrix* matrix, 72 const SkPaint& paint) SK_OVERRIDE; 73 virtual void drawPicture(SkPicture&) SK_OVERRIDE; 74 virtual void drawVertices(VertexMode vmode, int vertexCount, 75 const SkPoint vertices[], const SkPoint texs[], 76 const SkColor colors[], SkXfermode* xmode, 77 const uint16_t indices[], int indexCount, 78 const SkPaint& paint) SK_OVERRIDE; 79 virtual void drawData(const void* data, size_t length) SK_OVERRIDE; 80 81 virtual void beginCommentGroup(const char* description) SK_OVERRIDE; 82 virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE; 83 virtual void endCommentGroup() SK_OVERRIDE; 84 85 virtual SkBounder* setBounder(SkBounder* bounder) SK_OVERRIDE; 86 virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE; 87 88 private: 89 SkCanvas* fProxy; 90 91 typedef SkCanvas INHERITED; 92 }; 93 94 #endif 95
