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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 SkNoDrawCanvas_DEFINED
#define SkNoDrawCanvas_DEFINED
#include "include/core/SkCanvas.h"
#include "include/core/SkCanvasVirtualEnforcer.h"
struct SkIRect;
// SkNoDrawCanvas is a helper for SkCanvas subclasses which do not need to
// actually rasterize (e.g., analysis of the draw calls).
//
// It provides the following simplifications:
//
// * not backed by any device/pixels
// * conservative clipping (clipping calls only use rectangles)
//
class SK_API SkNoDrawCanvas : public SkCanvasVirtualEnforcer<SkCanvas> {
public:
SkNoDrawCanvas(int width, int height);
SkNoDrawCanvas(const SkIRect&);
explicit SkNoDrawCanvas(sk_sp<SkBaseDevice> device);
// Optimization to reset state to be the same as after construction.
void resetCanvas(int w, int h) { this->resetForNextPicture(SkIRect::MakeWH(w, h)); }
void resetCanvas(const SkIRect& rect) { this->resetForNextPicture(rect); }
protected:
SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override;
bool onDoSaveBehind(const SkRect*) override;
// No-op overrides for aborting rasterization earlier than SkNullBlitter.
void onDrawAnnotation(const SkRect&, const char[], SkData*) override {}
void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override {}
void onDrawDrawable(SkDrawable*, const SkMatrix*) 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 onDrawBehind(const SkPaint&) override {}
void onDrawPoints(PointMode, size_t, const SkPoint[], 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 onDrawRRect(const SkRRect&, const SkPaint&) override {}
void onDrawPath(const SkPath&, const SkPaint&) override {}
void onDrawImage2(const SkImage*, SkScalar, SkScalar, const SkSamplingOptions&,
const SkPaint*) override {}
void onDrawImageRect2(const SkImage*, const SkRect&, const SkRect&, const SkSamplingOptions&,
const SkPaint*, SrcRectConstraint) override {}
void onDrawImageLattice2(const SkImage*, const Lattice&, const SkRect&, SkFilterMode,
const SkPaint*) override {}
void onDrawAtlas2(const SkImage*, const SkRSXform[], const SkRect[], const SkColor[], int,
SkBlendMode, const SkSamplingOptions&, const SkRect*, const SkPaint*) override {}
void onDrawVerticesObject(const SkVertices*, SkBlendMode, const SkPaint&) override {}
void onDrawShadowRec(const SkPath&, const SkDrawShadowRec&) override {}
void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override {}
void onDrawEdgeAAQuad(const SkRect&, const SkPoint[4], QuadAAFlags, const SkColor4f&,
SkBlendMode) override {}
void onDrawEdgeAAImageSet2(const ImageSetEntry[], int, const SkPoint[], const SkMatrix[],
const SkSamplingOptions&, const SkPaint*,
SrcRectConstraint) override {}
private:
using INHERITED = SkCanvasVirtualEnforcer<SkCanvas>;
};
#endif // SkNoDrawCanvas_DEFINED
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