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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkOverdrawCanvas_DEFINED
#define SkOverdrawCanvas_DEFINED
#include "SkCanvasVirtualEnforcer.h"
#include "SkNWayCanvas.h"
/**
* Captures all drawing commands. Rather than draw the actual content, this device
* increments the alpha channel of each pixel every time it would have been touched
* by a draw call. This is useful for detecting overdraw.
*/
class SK_API SkOverdrawCanvas : public SkCanvasVirtualEnforcer<SkNWayCanvas> {
public:
/* Does not take ownership of canvas */
SkOverdrawCanvas(SkCanvas*);
void onDrawText(const void*, size_t, SkScalar, SkScalar, const SkPaint&) override;
void onDrawPosText(const void*, size_t, const SkPoint[], const SkPaint&) override;
void onDrawPosTextH(const void*, size_t, const SkScalar[], SkScalar, const SkPaint&) override;
void onDrawTextOnPath(const void*, size_t, const SkPath&, const SkMatrix*,
const SkPaint&) override;
void onDrawTextRSXform(const void*, size_t, const SkRSXform[], const SkRect*,
const SkPaint&) override;
void onDrawTextBlob(const SkTextBlob*, SkScalar, SkScalar, const SkPaint&) override;
void onDrawPatch(const SkPoint[12], const SkColor[4], const SkPoint[4], SkBlendMode,
const SkPaint&) override;
void onDrawPaint(const SkPaint&) override;
void onDrawRect(const SkRect&, const SkPaint&) override;
void onDrawRegion(const SkRegion&, const SkPaint&) override;
void onDrawOval(const SkRect&, const SkPaint&) override;
void onDrawArc(const SkRect&, SkScalar, SkScalar, bool, const SkPaint&) override;
void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
void onDrawRRect(const SkRRect&, const SkPaint&) override;
void onDrawPoints(PointMode, size_t, const SkPoint[], const SkPaint&) override;
void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override;
void onDrawAtlas(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[],
int, SkBlendMode, const SkRect*, const SkPaint*) override;
void onDrawPath(const SkPath&, const SkPaint&) override;
void onDrawImage(const SkImage*, SkScalar, SkScalar, const SkPaint*) override;
void onDrawImageRect(const SkImage*, const SkRect*, const SkRect&, const SkPaint*,
SrcRectConstraint) override;
void onDrawImageNine(const SkImage*, const SkIRect&, const SkRect&, const SkPaint*) override;
void onDrawImageLattice(const SkImage*, const Lattice&, const SkRect&, const SkPaint*) override;
void onDrawBitmap(const SkBitmap&, SkScalar, SkScalar, const SkPaint*) override;
void onDrawBitmapRect(const SkBitmap&, const SkRect*, const SkRect&, const SkPaint*,
SrcRectConstraint) override;
void onDrawBitmapNine(const SkBitmap&, const SkIRect&, const SkRect&, const SkPaint*) override;
void onDrawBitmapLattice(const SkBitmap&, const Lattice&, const SkRect&,
const SkPaint*) override;
void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
void onDrawAnnotation(const SkRect&, const char key[], SkData* value) override;
void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override;
private:
void drawPosTextCommon(const void*, size_t, const SkScalar[], int, const SkPoint&,
const SkPaint&);
inline SkPaint overdrawPaint(const SkPaint& paint);
SkPaint fPaint;
typedef SkCanvasVirtualEnforcer<SkNWayCanvas> INHERITED;
};
#endif
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