1 /* 2 * Copyright 2018 Google Inc. 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 SkSGOpacityEffect_DEFINED 9 #define SkSGOpacityEffect_DEFINED 10 11 #include "SkSGEffectNode.h" 12 13 namespace sksg { 14 15 /** 16 * Concrete Effect node, applying opacity to its descendants. 17 * 18 */ 19 class OpacityEffect final : public EffectNode { 20 public: 21 static sk_sp<OpacityEffect> Make(sk_sp<RenderNode> child, float opacity = 1) { 22 return child ? sk_sp<OpacityEffect>(new OpacityEffect(std::move(child), opacity)) : nullptr; 23 } 24 25 SG_ATTRIBUTE(Opacity, float, fOpacity) 26 27 protected: 28 OpacityEffect(sk_sp<RenderNode>, float); 29 30 void onRender(SkCanvas*, const RenderContext*) const override; 31 const RenderNode* onNodeAt(const SkPoint&) const override; 32 33 SkRect onRevalidate(InvalidationController*, const SkMatrix&) override; 34 35 private: 36 float fOpacity; 37 38 typedef EffectNode INHERITED; 39 }; 40 41 } // namespace sksg 42 43 #endif // SkSGOpacityEffect_DEFINED 44
