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 "SkSGEffectNode.h"
12
13namespace sksg {
14
15/**
16 * Concrete Effect node, applying a mask to its descendants.
17 *
18 */
19class MaskEffect final : public EffectNode {
20public:
21    static sk_sp<MaskEffect> Make(sk_sp<RenderNode> child, sk_sp<RenderNode> mask) {
22        return (child && mask)
23            ? sk_sp<MaskEffect>(new MaskEffect(std::move(child), std::move(mask)))
24            : nullptr;
25    }
26
27    ~MaskEffect() override;
28
29protected:
30    MaskEffect(sk_sp<RenderNode>, sk_sp<RenderNode> mask);
31
32    void onRender(SkCanvas*) const override;
33
34    SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
35
36private:
37    sk_sp<RenderNode> fMaskNode;
38
39    typedef EffectNode INHERITED;
40};
41
42} // namespace sksg
43
44#endif // SkSGMaskEffect_DEFINED
45