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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 SkProxyCanvas : public SkCanvas {
public:
SkProxyCanvas() : fProxy(NULL) {}
SkProxyCanvas(SkCanvas* proxy);
virtual ~SkProxyCanvas();
SkCanvas* getProxy() const { return fProxy; }
void setProxy(SkCanvas* proxy);
virtual int save(SaveFlags flags = kMatrixClip_SaveFlag) SK_OVERRIDE;
virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
SaveFlags flags = kARGB_ClipLayer_SaveFlag) SK_OVERRIDE;
virtual void restore() SK_OVERRIDE;
virtual bool translate(SkScalar dx, SkScalar dy) SK_OVERRIDE;
virtual bool scale(SkScalar sx, SkScalar sy) SK_OVERRIDE;
virtual bool rotate(SkScalar degrees) SK_OVERRIDE;
virtual bool skew(SkScalar sx, SkScalar sy) SK_OVERRIDE;
virtual bool concat(const SkMatrix& matrix) SK_OVERRIDE;
virtual void setMatrix(const SkMatrix& matrix) SK_OVERRIDE;
virtual bool clipRect(const SkRect&, SkRegion::Op, bool) SK_OVERRIDE;
virtual bool clipPath(const SkPath&, SkRegion::Op, bool) SK_OVERRIDE;
virtual bool clipRegion(const SkRegion& deviceRgn,
SkRegion::Op op = SkRegion::kIntersect_Op) SK_OVERRIDE;
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 drawRect(const SkRect& rect, 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 drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
const SkRect& dst, const SkPaint* paint = NULL) 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 SkBounder* setBounder(SkBounder* bounder) SK_OVERRIDE;
virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE;
private:
SkCanvas* fProxy;
typedef SkCanvas INHERITED;
};
#endif
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