diff options
Diffstat (limited to 'experimental/sksg')
-rw-r--r-- | experimental/sksg/geometry/SkSGRoundEffect.cpp | 56 | ||||
-rw-r--r-- | experimental/sksg/geometry/SkSGRoundEffect.h | 50 |
2 files changed, 106 insertions, 0 deletions
diff --git a/experimental/sksg/geometry/SkSGRoundEffect.cpp b/experimental/sksg/geometry/SkSGRoundEffect.cpp new file mode 100644 index 0000000000..8cf9068f65 --- /dev/null +++ b/experimental/sksg/geometry/SkSGRoundEffect.cpp @@ -0,0 +1,56 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkSGRoundEffect.h" + +#include "SkCanvas.h" +#include "SkCornerPathEffect.h" +#include "SkStrokeRec.h" + +namespace sksg { + +RoundEffect::RoundEffect(sk_sp<GeometryNode> child) + : fChild(std::move(child)) { + this->observeInval(fChild); +} + +RoundEffect::~RoundEffect() { + this->unobserveInval(fChild); +} + +void RoundEffect::onClip(SkCanvas* canvas, bool antiAlias) const { + canvas->clipPath(fRoundedPath, SkClipOp::kIntersect, antiAlias); +} + +void RoundEffect::onDraw(SkCanvas* canvas, const SkPaint& paint) const { + SkASSERT(!paint.getPathEffect()); + + canvas->drawPath(fRoundedPath, paint); +} + +SkPath RoundEffect::onAsPath() const { + return fRoundedPath; +} + +SkRect RoundEffect::onRevalidate(InvalidationController* ic, const SkMatrix& ctm) { + SkASSERT(this->hasInval()); + + const auto childbounds = fChild->revalidate(ic, ctm); + const auto path = fChild->asPath(); + + if (auto round = SkCornerPathEffect::Make(fRadius)) { + fRoundedPath.reset(); + SkStrokeRec rec(SkStrokeRec::kHairline_InitStyle); + SkAssertResult(round->filterPath(&fRoundedPath, path, &rec, &childbounds)); + } else { + fRoundedPath = path; + } + + return fRoundedPath.computeTightBounds(); +} + +} // namespace sksg diff --git a/experimental/sksg/geometry/SkSGRoundEffect.h b/experimental/sksg/geometry/SkSGRoundEffect.h new file mode 100644 index 0000000000..67124ca072 --- /dev/null +++ b/experimental/sksg/geometry/SkSGRoundEffect.h @@ -0,0 +1,50 @@ +/* + * Copyright 2018 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SkSGRoundEffect_DEFINED +#define SkSGRoundEffect_DEFINED + +#include "SkSGGeometryNode.h" + +#include "SkPath.h" + +namespace sksg { + +/** + * Concrete Geometry node, applying a rounded-corner effect to its child. + */ +class RoundEffect final : public GeometryNode { +public: + static sk_sp<RoundEffect> Make(sk_sp<GeometryNode> child) { + return child ? sk_sp<RoundEffect>(new RoundEffect(std::move(child))) : nullptr; + } + + ~RoundEffect() override; + + SG_ATTRIBUTE(Radius, SkScalar, fRadius) + +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 RoundEffect(sk_sp<GeometryNode>); + + const sk_sp<GeometryNode> fChild; + + SkPath fRoundedPath; + SkScalar fRadius = 0; + + using INHERITED = GeometryNode; +}; + +} // namespace sksg + +#endif // SkSGRoundEffect_DEFINED |