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