| /* |
| * 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; |
| |
| SkScalar fStart = 0, // starting t |
| fEnd = 1, // ending t |
| fOffset = 0; // t offset |
| |
| using INHERITED = GeometryNode; |
| }; |
| |
| } // namespace sksg |
| |
| #endif // SkSGTrimEffect_DEFINED |