c0132ffa64
- plumb a RenderContext RenderNode::render() argument to track pending
opacity
- defer opacity application until we can determine whether a layer is
required (group with multiple children) or the opacity can be pushed
onto the draw paint (for single/atomic draws)
Bug: skia:
Change-Id: I962ba08bad780395d5d738307bde986e9efa502b
Reviewed-on: https://skia-review.googlesource.com/146445
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
43 lines
952 B
C++
43 lines
952 B
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 SkSGOpacityEffect_DEFINED
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#define SkSGOpacityEffect_DEFINED
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#include "SkSGEffectNode.h"
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namespace sksg {
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/**
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* Concrete Effect node, applying opacity to its descendants.
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*
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*/
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class OpacityEffect final : public EffectNode {
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public:
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static sk_sp<OpacityEffect> Make(sk_sp<RenderNode> child, float opacity = 1) {
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return child ? sk_sp<OpacityEffect>(new OpacityEffect(std::move(child), opacity)) : nullptr;
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}
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SG_ATTRIBUTE(Opacity, float, fOpacity)
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protected:
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OpacityEffect(sk_sp<RenderNode>, float);
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void onRender(SkCanvas*, const RenderContext*) const override;
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SkRect onRevalidate(InvalidationController*, const SkMatrix&) override;
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private:
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float fOpacity;
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typedef EffectNode INHERITED;
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};
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} // namespace sksg
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#endif // SkSGOpacityEffect_DEFINED
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