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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);
void beginCommentGroup(const char* description) SK_OVERRIDE;
void addComment(const char* kywd, const char* value) SK_OVERRIDE;
void endCommentGroup() SK_OVERRIDE;
SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE;
protected:
void willSave() SK_OVERRIDE;
SaveLayerStrategy willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE;
void willRestore() SK_OVERRIDE;
void didConcat(const SkMatrix&) SK_OVERRIDE;
void didSetMatrix(const SkMatrix&) SK_OVERRIDE;
void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
const SkPaint&) SK_OVERRIDE;
virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
const SkPaint&) SK_OVERRIDE;
virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
SkScalar constY, const SkPaint&) SK_OVERRIDE;
virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
const SkMatrix* matrix, const SkPaint&) SK_OVERRIDE;
virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint& paint) SK_OVERRIDE;
virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkXfermode* xmode,
const SkPaint& paint) SK_OVERRIDE;
void onDrawPaint(const SkPaint&) SK_OVERRIDE;
void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) SK_OVERRIDE;
void onDrawRect(const SkRect&, const SkPaint&) SK_OVERRIDE;
void onDrawOval(const SkRect&, const SkPaint&) SK_OVERRIDE;
void onDrawRRect(const SkRRect&, const SkPaint&) SK_OVERRIDE;
void onDrawPath(const SkPath&, const SkPaint&) SK_OVERRIDE;
void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) SK_OVERRIDE;
void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, const SkPaint*,
DrawBitmapRectFlags flags) SK_OVERRIDE;
void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) SK_OVERRIDE;
void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
const SkPaint*) SK_OVERRIDE;
void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
const SkPaint*) SK_OVERRIDE;
void onDrawSprite(const SkBitmap&, int left, int top, const SkPaint*) SK_OVERRIDE;
void onDrawVertices(VertexMode vmode, int vertexCount,
const SkPoint vertices[], const SkPoint texs[],
const SkColor colors[], SkXfermode* xmode,
const uint16_t indices[], int indexCount,
const SkPaint&) SK_OVERRIDE;
void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE;
void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVERRIDE;
private:
SkCanvas* fProxy;
typedef SkCanvas INHERITED;
};
#endif
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