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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 void beginCommentGroup(const char* description) SK_OVERRIDE; | |
30 void addComment(const char* kywd, const char* value) SK_OVERRIDE; | |
31 void endCommentGroup() SK_OVERRIDE; | |
32 | |
33 SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE; | |
34 | |
35 protected: | |
36 void willSave() SK_OVERRIDE; | |
37 SaveLayerStrategy willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK
_OVERRIDE; | |
38 void willRestore() SK_OVERRIDE; | |
39 | |
40 void didConcat(const SkMatrix&) SK_OVERRIDE; | |
41 void didSetMatrix(const SkMatrix&) SK_OVERRIDE; | |
42 | |
43 void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRID
E; | |
44 virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkS
calar y, | |
45 const SkPaint&) SK_OVERRIDE; | |
46 virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoin
t pos[], | |
47 const SkPaint&) SK_OVERRIDE; | |
48 virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkSca
lar xpos[], | |
49 SkScalar constY, const SkPaint&) SK_OVERRIDE; | |
50 virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkP
ath& path, | |
51 const SkMatrix* matrix, const SkPaint&) SK_OVE
RRIDE; | |
52 virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, | |
53 const SkPaint& paint) SK_OVERRIDE; | |
54 virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], | |
55 const SkPoint texCoords[4], SkXfermode* xmode, | |
56 const SkPaint& paint) SK_OVERRIDE; | |
57 | |
58 void onDrawPaint(const SkPaint&) SK_OVERRIDE; | |
59 void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPain
t&) SK_OVERRIDE; | |
60 void onDrawRect(const SkRect&, const SkPaint&) SK_OVERRIDE; | |
61 void onDrawOval(const SkRect&, const SkPaint&) SK_OVERRIDE; | |
62 void onDrawRRect(const SkRRect&, const SkPaint&) SK_OVERRIDE; | |
63 void onDrawPath(const SkPath&, const SkPaint&) SK_OVERRIDE; | |
64 void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPain
t*) SK_OVERRIDE; | |
65 void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst,
const SkPaint*, | |
66 DrawBitmapRectFlags flags) SK_OVERRIDE; | |
67 void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*
) SK_OVERRIDE; | |
68 void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst, | |
69 const SkPaint*) SK_OVERRIDE; | |
70 void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect&
dst, | |
71 const SkPaint*) SK_OVERRIDE; | |
72 void onDrawSprite(const SkBitmap&, int left, int top, const SkPaint*) SK_OVE
RRIDE; | |
73 void onDrawVertices(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&) SK_OVERRIDE; | |
78 | |
79 void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE; | |
80 void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE; | |
81 void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE; | |
82 void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE; | |
83 | |
84 void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVE
RRIDE; | |
85 | |
86 private: | |
87 SkCanvas* fProxy; | |
88 | |
89 typedef SkCanvas INHERITED; | |
90 }; | |
91 | |
92 #endif | |
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