100 lines
4.9 KiB
C++
100 lines
4.9 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkProxyCanvas_DEFINED
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#define SkProxyCanvas_DEFINED
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#include "SkCanvas.h"
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/** This class overrides all virtual methods on SkCanvas, and redirects them
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to a "proxy", another SkCanvas instance. It can be the basis for
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intercepting (and possibly modifying) calls to a canvas.
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There must be a proxy installed before the proxycanvas can be used (i.e.
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before its virtual methods can be called).
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*/
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class SK_API SkProxyCanvas : public SkCanvas {
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public:
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SkProxyCanvas() : fProxy(NULL) {}
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SkProxyCanvas(SkCanvas* proxy);
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virtual ~SkProxyCanvas();
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SkCanvas* getProxy() const { return fProxy; }
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void setProxy(SkCanvas* proxy);
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virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE;
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virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawOval(const SkRect&, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawRect(const SkRect&, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawRRect(const SkRRect&, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE;
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virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
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const SkPaint* paint = NULL) SK_OVERRIDE;
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virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
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const SkRect& dst, const SkPaint* paint,
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DrawBitmapRectFlags flags) SK_OVERRIDE;
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virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
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const SkPaint* paint = NULL) SK_OVERRIDE;
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virtual void drawImage(const SkImage* image, SkScalar left, SkScalar top,
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const SkPaint* paint = NULL) SK_OVERRIDE;
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virtual void drawImageRect(const SkImage* image, const SkRect* src,
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const SkRect& dst,
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const SkPaint* paint = NULL) SK_OVERRIDE;
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virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
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const SkPaint* paint = NULL) SK_OVERRIDE;
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virtual void drawVertices(VertexMode vmode, int vertexCount,
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const SkPoint vertices[], const SkPoint texs[],
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const SkColor colors[], SkXfermode* xmode,
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const uint16_t indices[], int indexCount,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void drawData(const void* data, size_t length) SK_OVERRIDE;
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virtual void beginCommentGroup(const char* description) SK_OVERRIDE;
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virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE;
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virtual void endCommentGroup() SK_OVERRIDE;
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virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE;
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protected:
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virtual void willSave() SK_OVERRIDE;
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virtual SaveLayerStrategy willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE;
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virtual void willRestore() SK_OVERRIDE;
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virtual void didConcat(const SkMatrix&) SK_OVERRIDE;
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virtual void didSetMatrix(const SkMatrix&) SK_OVERRIDE;
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virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
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virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
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const SkPaint&) SK_OVERRIDE;
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virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
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const SkPaint&) SK_OVERRIDE;
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virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
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SkScalar constY, const SkPaint&) SK_OVERRIDE;
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virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
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const SkMatrix* matrix, const SkPaint&) SK_OVERRIDE;
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virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
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const SkPoint texCoords[4], SkXfermode* xmode,
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const SkPaint& paint) SK_OVERRIDE;
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virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
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virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
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virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
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virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE;
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virtual void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVERRIDE;
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private:
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SkCanvas* fProxy;
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typedef SkCanvas INHERITED;
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};
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#endif
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