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 SkSGMaskEffect_DEFINED |
9 | #define SkSGMaskEffect_DEFINED |
10 | |
11 | #include "modules/sksg/include/SkSGEffectNode.h" |
12 | |
13 | namespace sksg { |
14 | |
15 | /** |
16 | * Concrete Effect node, applying a mask to its descendants. |
17 | * |
18 | */ |
19 | class MaskEffect final : public EffectNode { |
20 | public: |
21 | enum class Mode : uint32_t { |
22 | kAlphaNormal, |
23 | kAlphaInvert, |
24 | kLumaNormal, |
25 | kLumaInvert, |
26 | }; |
27 | |
28 | static sk_sp<MaskEffect> Make(sk_sp<RenderNode> child, sk_sp<RenderNode> mask, |
29 | Mode mode = Mode::kAlphaNormal) { |
30 | return (child && mask) |
31 | ? sk_sp<MaskEffect>(new MaskEffect(std::move(child), std::move(mask), mode)) |
32 | : nullptr; |
33 | } |
34 | |
35 | ~MaskEffect() override; |
36 | |
37 | protected: |
38 | MaskEffect(sk_sp<RenderNode>, sk_sp<RenderNode> mask, Mode); |
39 | |
40 | void onRender(SkCanvas*, const RenderContext*) const override; |
41 | const RenderNode* onNodeAt(const SkPoint&) const override; |
42 | |
43 | SkRect onRevalidate(InvalidationController*, const SkMatrix&) override; |
44 | |
45 | private: |
46 | const sk_sp<RenderNode> fMaskNode; |
47 | const Mode fMaskMode; |
48 | |
49 | typedef EffectNode INHERITED; |
50 | }; |
51 | |
52 | } // namespace sksg |
53 | |
54 | #endif // SkSGMaskEffect_DEFINED |
55 | |