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