bd64f18947
Introduce sksg::BlendModeEffect and use to wrap Skottie layers based on their "bm" property. Depending on the presence of non-trivial layer blend modes and the nature of the destination buffer (fully transparent vs. unknown/pre-filled), we may now need to render animation frames into a separate layer for correct compositing. Track the presence of non-trivial layer blend modes such that we only incur this extra layer overhead when needed. Also allow clients to pass a "drawing to fully transparent buffer" hint such that we can avoid the extra layer even when blend modes are present. Change-Id: Iaf645878666da4349d0bef8890bbecad23a0aa9b Reviewed-on: https://skia-review.googlesource.com/c/194840 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Florin Malita <fmalita@chromium.org>
137 lines
3.2 KiB
C++
137 lines
3.2 KiB
C++
/*
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* Copyright 2019 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 SkSGRenderEffect_DEFINED
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#define SkSGRenderEffect_DEFINED
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#include "SkSGEffectNode.h"
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#include "SkBlendMode.h"
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#include "SkColor.h"
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#include <memory>
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#include <vector>
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// TODO: merge EffectNode.h with this header
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class SkImageFilter;
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namespace sksg {
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/**
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* ImageFilter base class.
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*/
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class ImageFilter : public Node {
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public:
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~ImageFilter() override;
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const sk_sp<SkImageFilter>& getFilter() const {
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SkASSERT(!this->hasInval());
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return fFilter;
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}
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protected:
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explicit ImageFilter(sk_sp<ImageFilter> input = 0);
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using InputsT = std::vector<sk_sp<ImageFilter>>;
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explicit ImageFilter(std::unique_ptr<InputsT> inputs);
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SkRect onRevalidate(InvalidationController*, const SkMatrix&) final;
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virtual sk_sp<SkImageFilter> onRevalidateFilter() = 0;
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sk_sp<SkImageFilter> refInput(size_t) const;
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private:
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const std::unique_ptr<InputsT> fInputs;
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sk_sp<SkImageFilter> fFilter;
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using INHERITED = Node;
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};
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/**
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* Attaches an ImageFilter (chain) to the render DAG.
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*/
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class ImageFilterEffect final : public EffectNode {
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public:
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~ImageFilterEffect() override;
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static sk_sp<RenderNode> Make(sk_sp<RenderNode> child, sk_sp<ImageFilter> filter);
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protected:
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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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ImageFilterEffect(sk_sp<RenderNode> child, sk_sp<ImageFilter> filter);
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sk_sp<ImageFilter> fImageFilter;
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using INHERITED = EffectNode;
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};
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/**
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* SkDropShadowImageFilter node.
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*/
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class DropShadowImageFilter final : public ImageFilter {
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public:
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~DropShadowImageFilter() override;
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static sk_sp<DropShadowImageFilter> Make(sk_sp<ImageFilter> input = nullptr);
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enum class Mode { kShadowAndForeground, kShadowOnly };
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SG_ATTRIBUTE(Offset, SkVector, fOffset)
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SG_ATTRIBUTE(Sigma , SkVector, fSigma )
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SG_ATTRIBUTE(Color , SkColor , fColor )
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SG_ATTRIBUTE(Mode , Mode , fMode )
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protected:
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sk_sp<SkImageFilter> onRevalidateFilter() override;
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private:
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explicit DropShadowImageFilter(sk_sp<ImageFilter> input);
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SkVector fOffset = { 0, 0 },
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fSigma = { 0, 0 };
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SkColor fColor = SK_ColorBLACK;
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Mode fMode = Mode::kShadowAndForeground;
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using INHERITED = ImageFilter;
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};
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/**
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* Applies a SkBlendMode to descendant render nodes.
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*/
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class BlendModeEffect final : public EffectNode {
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public:
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~BlendModeEffect() override;
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static sk_sp<BlendModeEffect> Make(sk_sp<RenderNode> child,
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SkBlendMode = SkBlendMode::kSrcOver);
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SG_ATTRIBUTE(Mode, SkBlendMode, fMode)
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protected:
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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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private:
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BlendModeEffect(sk_sp<RenderNode>, SkBlendMode);
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SkBlendMode fMode;
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using INHERITED = EffectNode;
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};
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} // namespace sksg
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#endif // SkSGRenderEffect_DEFINED
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