59e72b71b5
Expand matte support to include normal/inverted luma modes [1]. [1] https://helpx.adobe.com/after-effects/using/alpha-channels-masks-mattes.html#track_mattes_and_traveling_mattes TBR= Bug: skia:9390 Change-Id: Ie6555852e70449e4343944c70d2f9b8a98bb33cb Reviewed-on: https://skia-review.googlesource.com/c/skia/+/248701 Reviewed-by: Florin Malita <fmalita@chromium.org> Commit-Queue: Florin Malita <fmalita@chromium.org>
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
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* Copyright 2018 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSGMaskEffect_DEFINED
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#define SkSGMaskEffect_DEFINED
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#include "modules/sksg/include/SkSGEffectNode.h"
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namespace sksg {
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/**
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* Concrete Effect node, applying a mask to its descendants.
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*
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*/
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class MaskEffect final : public EffectNode {
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public:
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enum class Mode : uint32_t {
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kAlphaNormal,
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kAlphaInvert,
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kLumaNormal,
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kLumaInvert,
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};
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static sk_sp<MaskEffect> Make(sk_sp<RenderNode> child, sk_sp<RenderNode> mask,
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Mode mode = Mode::kAlphaNormal) {
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return (child && mask)
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? sk_sp<MaskEffect>(new MaskEffect(std::move(child), std::move(mask), mode))
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: nullptr;
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}
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~MaskEffect() override;
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protected:
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MaskEffect(sk_sp<RenderNode>, sk_sp<RenderNode> mask, Mode);
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void onRender(SkCanvas*, const RenderContext*) const override;
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const RenderNode* onNodeAt(const SkPoint&) const override;
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SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
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private:
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const sk_sp<RenderNode> fMaskNode;
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const Mode fMaskMode;
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typedef EffectNode INHERITED;
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};
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} // namespace sksg
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#endif // SkSGMaskEffect_DEFINED
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