michael@0: 
michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkCanvasStack_DEFINED
michael@0: #define SkCanvasStack_DEFINED
michael@0: 
michael@0: #include "SkNWayCanvas.h"
michael@0: #include "SkTArray.h"
michael@0: 
michael@0: class SkCanvasStack : public SkNWayCanvas {
michael@0: public:
michael@0:     SkCanvasStack(int width, int height);
michael@0:     virtual ~SkCanvasStack();
michael@0: 
michael@0:     void pushCanvas(SkCanvas* canvas, const SkIPoint& origin);
michael@0:     virtual void removeAll() SK_OVERRIDE;
michael@0: 
michael@0:     /*
michael@0:      * The following add/remove canvas methods are overrides from SkNWayCanvas
michael@0:      * that do not make sense in the context of our CanvasStack, but since we
michael@0:      * can share most of the other implementation of NWay we override those
michael@0:      * methods to be no-ops.
michael@0:      */
michael@0:     virtual void addCanvas(SkCanvas*) SK_OVERRIDE { SkDEBUGFAIL("Invalid Op"); }
michael@0:     virtual void removeCanvas(SkCanvas*) SK_OVERRIDE { SkDEBUGFAIL("Invalid Op"); }
michael@0: 
michael@0: protected:
michael@0:     virtual void didSetMatrix(const SkMatrix&) SK_OVERRIDE;
michael@0: 
michael@0:     virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
michael@0:     virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
michael@0:     virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
michael@0:     virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     void clipToZOrderedBounds();
michael@0: 
michael@0:     struct CanvasData {
michael@0:         SkIPoint origin;
michael@0:         SkRegion requiredClip;
michael@0:     };
michael@0: 
michael@0:     SkTArray<CanvasData> fCanvasData;
michael@0: 
michael@0:     typedef SkNWayCanvas INHERITED;
michael@0: };
michael@0: 
michael@0: #endif