3 * Copyright 2011 Google Inc.
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
8 #ifndef SkProxyCanvas_DEFINED
9 #define SkProxyCanvas_DEFINED
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.
17 There must be a proxy installed before the proxycanvas can be used (i.e.
18 before its virtual methods can be called).
20 class SK_API SkProxyCanvas : public SkCanvas {
22 SkProxyCanvas() : fProxy(NULL) {}
23 SkProxyCanvas(SkCanvas* proxy);
24 virtual ~SkProxyCanvas();
26 SkCanvas* getProxy() const { return fProxy; }
27 void setProxy(SkCanvas* proxy);
29 virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE;
30 virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
31 const SkPaint& paint) SK_OVERRIDE;
32 virtual void drawOval(const SkRect&, const SkPaint& paint) SK_OVERRIDE;
33 virtual void drawRect(const SkRect&, const SkPaint& paint) SK_OVERRIDE;
34 virtual void drawRRect(const SkRRect&, const SkPaint& paint) SK_OVERRIDE;
35 virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE;
36 virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
37 const SkPaint* paint = NULL) SK_OVERRIDE;
38 virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
39 const SkRect& dst, const SkPaint* paint,
40 DrawBitmapRectFlags flags) SK_OVERRIDE;
41 virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
42 const SkPaint* paint = NULL) SK_OVERRIDE;
43 virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
44 const SkPaint* paint = NULL) SK_OVERRIDE;
45 virtual void drawVertices(VertexMode vmode, int vertexCount,
46 const SkPoint vertices[], const SkPoint texs[],
47 const SkColor colors[], SkXfermode* xmode,
48 const uint16_t indices[], int indexCount,
49 const SkPaint& paint) SK_OVERRIDE;
50 virtual void drawData(const void* data, size_t length) SK_OVERRIDE;
52 virtual void beginCommentGroup(const char* description) SK_OVERRIDE;
53 virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE;
54 virtual void endCommentGroup() SK_OVERRIDE;
56 virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE;
59 virtual void willSave() SK_OVERRIDE;
60 virtual SaveLayerStrategy willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE;
61 virtual void willRestore() SK_OVERRIDE;
63 virtual void didConcat(const SkMatrix&) SK_OVERRIDE;
64 virtual void didSetMatrix(const SkMatrix&) SK_OVERRIDE;
66 virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
67 virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
68 const SkPaint&) SK_OVERRIDE;
69 virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
70 const SkPaint&) SK_OVERRIDE;
71 virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
72 SkScalar constY, const SkPaint&) SK_OVERRIDE;
73 virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
74 const SkMatrix* matrix, const SkPaint&) SK_OVERRIDE;
75 virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
76 const SkPaint& paint) SK_OVERRIDE;
77 virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
78 const SkPoint texCoords[4], SkXfermode* xmode,
79 const SkPaint& paint) SK_OVERRIDE;
81 virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
82 virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
83 virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
84 virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE;
86 virtual void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVERRIDE;
91 typedef SkCanvas INHERITED;