skia2/modules/sksg/include/SkSGTrimEffect.h
Florin Malita eb46bd892d [sksg] Hit-testing API
Introduce RenderNode::nodeAt(const SkPoint&) as the entry point for the hit-testing API.

This is backed by a onNodeAt() virtual, which gets dispatched throughout the render DAG,
and normally stops at the first leaf Draw node in encounters.

To support the implementation, introduce a GeometryNode::contains(const SkPoint&) API.

This is backed by a onContains() virtual, overridden in each concrete geometry class.

Expose nodeAt() on sksg::Scene, and add some basic unit tests.

Change-Id: I0c8abd9d1e51ecf2d8b4dd699f325cd636e21084
Reviewed-on: https://skia-review.googlesource.com/c/191296
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Mike Reed <reed@google.com>
2019-02-12 15:01:05 +00:00

60 lines
1.5 KiB
C++

/*
* 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"
#include "SkTrimPathEffect.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(Stop , SkScalar , fStop )
SG_ATTRIBUTE(Mode , SkTrimPathEffect::Mode, fMode )
protected:
void onClip(SkCanvas*, bool antiAlias) const override;
void onDraw(SkCanvas*, const SkPaint&) const override;
bool onContains(const SkPoint&) 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,
fStop = 1;
SkTrimPathEffect::Mode fMode = SkTrimPathEffect::Mode::kNormal;
using INHERITED = GeometryNode;
};
} // namespace sksg
#endif // SkSGTrimEffect_DEFINED