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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSGTrimEffect_DEFINED
#define SkSGTrimEffect_DEFINED
#include "SkSGGeometryNode.h"
#include "SkPath.h"
class SkCanvas;
class SkPaint;
namespace sksg {
/**
* Concrete Geometry node, applying a trim effect to its child.
*/
class TrimEffect final : public GeometryNode {
public:
static sk_sp<TrimEffect> Make(sk_sp<GeometryNode> child) {
return child ? sk_sp<TrimEffect>(new TrimEffect(std::move(child))) : nullptr;
}
~TrimEffect() override;
SG_ATTRIBUTE(Start , SkScalar, fStart )
SG_ATTRIBUTE(End , SkScalar, fEnd )
SG_ATTRIBUTE(Offset, SkScalar, fOffset)
protected:
void onClip(SkCanvas*, bool antiAlias) const override;
void onDraw(SkCanvas*, const SkPaint&) const override;
SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
SkPath onAsPath() const override;
private:
explicit TrimEffect(sk_sp<GeometryNode>);
const sk_sp<GeometryNode> fChild;
SkPath fTrimmedPath;
SkScalar fStart = 0, // starting t
fEnd = 1, // ending t
fOffset = 0; // t offset
using INHERITED = GeometryNode;
};
} // namespace sksg
#endif // SkSGTrimEffect_DEFINED
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