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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSGMaskEffect_DEFINED
#define SkSGMaskEffect_DEFINED
#include "modules/sksg/include/SkSGEffectNode.h"
namespace sksg {
/**
* Concrete Effect node, applying a mask to its descendants.
*
*/
class MaskEffect final : public EffectNode {
public:
enum class Mode : uint32_t {
kAlphaNormal,
kAlphaInvert,
kLumaNormal,
kLumaInvert,
};
static sk_sp<MaskEffect> Make(sk_sp<RenderNode> child, sk_sp<RenderNode> mask,
Mode mode = Mode::kAlphaNormal) {
return (child && mask)
? sk_sp<MaskEffect>(new MaskEffect(std::move(child), std::move(mask), mode))
: nullptr;
}
~MaskEffect() override;
protected:
MaskEffect(sk_sp<RenderNode>, sk_sp<RenderNode> mask, Mode);
void onRender(SkCanvas*, const RenderContext*) const override;
const RenderNode* onNodeAt(const SkPoint&) const override;
SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
private:
const sk_sp<RenderNode> fMaskNode;
const Mode fMaskMode;
typedef EffectNode INHERITED;
};
} // namespace sksg
#endif // SkSGMaskEffect_DEFINED