1 /* 2 * Copyright 2006 The Android Open Source Project 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkCornerPathEffect_DEFINED 9 #define SkCornerPathEffect_DEFINED 10 11 #include "include/core/SkFlattenable.h" 12 #include "include/core/SkPathEffect.h" 13 14 /** \class SkCornerPathEffect 15 16 SkCornerPathEffect is a subclass of SkPathEffect that can turn sharp corners 17 into various treatments (e.g. rounded corners) 18 */ 19 class SK_API SkCornerPathEffect : public SkPathEffect { 20 public: 21 /** radius must be > 0 to have an effect. It specifies the distance from each corner 22 that should be "rounded". 23 */ Make(SkScalar radius)24 static sk_sp<SkPathEffect> Make(SkScalar radius) { 25 return radius > 0 ? sk_sp<SkPathEffect>(new SkCornerPathEffect(radius)) : nullptr; 26 } 27 28 protected: 29 ~SkCornerPathEffect() override; 30 31 explicit SkCornerPathEffect(SkScalar radius); 32 void flatten(SkWriteBuffer&) const override; 33 bool onFilterPath(SkPath* dst, const SkPath& src, SkStrokeRec*, const SkRect*) const override; 34 35 private: SK_FLATTENABLE_HOOKS(SkCornerPathEffect)36 SK_FLATTENABLE_HOOKS(SkCornerPathEffect) 37 38 bool computeFastBounds(SkRect*) const override { 39 // Rounding sharp corners within a path produces a new path that is still contained within 40 // the original's bounds, so leave 'bounds' unmodified. 41 return true; 42 } 43 44 SkScalar fRadius; 45 46 using INHERITED = SkPathEffect; 47 }; 48 49 #endif 50