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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkNoSaveLayerCanvas_DEFINED
#define SkNoSaveLayerCanvas_DEFINED
#include "SkCanvas.h"
#include "SkRRect.h"
// The NoSaveLayerCanvas is used to play back SkPictures when the saveLayer
// functionality isn't required (e.g., during analysis of the draw calls).
// It also simplifies the clipping calls to only use rectangles.
class SkNoSaveLayerCanvas : public SkCanvas {
public:
SkNoSaveLayerCanvas(SkBaseDevice* device) : INHERITED(device) {}
// turn saveLayer() into save() for speed, should not affect correctness.
virtual int saveLayer(const SkRect* bounds,
const SkPaint* paint,
SaveFlags flags) SK_OVERRIDE {
// Like SkPictureRecord, we don't want to create layers, but we do need
// to respect the save and (possibly) its rect-clip.
int count = this->INHERITED::save(flags);
if (NULL != bounds) {
this->INHERITED::clipRectBounds(bounds, flags, NULL);
}
return count;
}
protected:
// disable aa for speed
virtual void onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE {
this->INHERITED::onClipRect(rect, op, kHard_ClipEdgeStyle);
}
// for speed, just respect the bounds, and disable AA. May give us a few
// false positives and negatives.
virtual void onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE {
this->updateClipConservativelyUsingBounds(path.getBounds(), op,
path.isInverseFillType());
}
virtual void onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle) SK_OVERRIDE {
this->updateClipConservativelyUsingBounds(rrect.getBounds(), op, false);
}
private:
typedef SkCanvas INHERITED;
};
#endif // SkNoSaveLayerCanvas_DEFINED
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