ed38d201de
AE supports dashing all strokes. Dashes are specified as an arbitrary
number of intervals (alternating dash/gap) plus a start offset.
All values can be animated independently (but of course!).
- implement a SkSG dash effect (based on SkDashPathEffect)
- expand the shape builder logic to allow local geometry adjustments
(kind of a bummer that dashing is a stroke/paint property as opposed
to a geometry effect in AE)
Change-Id: Ic9ff35f2f9a552a3c26f9e1596ce58ad81f7ced5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274550
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
/*
|
|
* Copyright 2020 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifndef SkSGDashEffect_DEFINED
|
|
#define SkSGDashEffect_DEFINED
|
|
|
|
#include "include/core/SkPath.h"
|
|
#include "modules/sksg/include/SkSGGeometryNode.h"
|
|
|
|
#include <vector>
|
|
|
|
namespace sksg {
|
|
|
|
/**
|
|
* Apply a dash effect to the child geometry.
|
|
*
|
|
* Follows the same semantics as SkDashPathEffect, with one minor tweak: when the number of
|
|
* intervals is odd, they are repeated once more to attain an even sequence (same as SVG
|
|
* stroke-dasharray: https://www.w3.org/TR/SVG11/painting.html#StrokeDasharrayProperty).
|
|
*/
|
|
class DashEffect final : public GeometryNode {
|
|
public:
|
|
static sk_sp<DashEffect> Make(sk_sp<GeometryNode> child) {
|
|
return child ? sk_sp<DashEffect>(new DashEffect(std::move(child))) : nullptr;
|
|
}
|
|
|
|
~DashEffect() override;
|
|
|
|
SG_ATTRIBUTE(Intervals, std::vector<float>, fIntervals)
|
|
SG_ATTRIBUTE(Phase, float , fPhase )
|
|
|
|
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 DashEffect(sk_sp<GeometryNode>);
|
|
|
|
const sk_sp<GeometryNode> fChild;
|
|
|
|
SkPath fDashedPath; // cache
|
|
|
|
std::vector<float> fIntervals;
|
|
float fPhase;
|
|
};
|
|
|
|
} // namespace sksg
|
|
|
|
#endif // SkSGDashEffect_DEFINED
|