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 "modules/sksg/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 |