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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkCanvasStack_DEFINED
#define SkCanvasStack_DEFINED
#include "SkNWayCanvas.h"
#include "SkTArray.h"
class SkCanvasStack : public SkNWayCanvas {
public:
SkCanvasStack(int width, int height);
virtual ~SkCanvasStack();
void pushCanvas(SkCanvas* canvas, const SkIPoint& origin);
void removeAll() override;
/*
* The following add/remove canvas methods are overrides from SkNWayCanvas
* that do not make sense in the context of our CanvasStack, but since we
* can share most of the other implementation of NWay we override those
* methods to be no-ops.
*/
void addCanvas(SkCanvas*) override { SkDEBUGFAIL("Invalid Op"); }
void removeCanvas(SkCanvas*) override { SkDEBUGFAIL("Invalid Op"); }
protected:
void didSetMatrix(const SkMatrix&) override;
void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
void onClipRegion(const SkRegion&, SkRegion::Op) override;
private:
void clipToZOrderedBounds();
struct CanvasData {
SkIPoint origin;
SkRegion requiredClip;
};
SkTArray<CanvasData> fCanvasData;
typedef SkNWayCanvas INHERITED;
};
#endif
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