bef51c23c3
Apply opacity as fill/stroke paint alpha instead of saveLayer, when possible. R=robertphillips@google.com,stephana@google.com,reed@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2353503005 Committed: https://skia.googlesource.com/skia/+/3dbb7b9f196d793fbd16243157ee67638891f5dc Review-Url: https://codereview.chromium.org/2353503005
98 lines
3.0 KiB
C++
98 lines
3.0 KiB
C++
/*
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* Copyright 2016 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 SkSVGRenderContext_DEFINED
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#define SkSVGRenderContext_DEFINED
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#include "SkPaint.h"
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#include "SkRect.h"
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#include "SkSize.h"
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#include "SkSVGAttribute.h"
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#include "SkSVGIDMapper.h"
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#include "SkTLazy.h"
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#include "SkTypes.h"
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class SkCanvas;
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class SkSVGLength;
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class SkSVGLengthContext {
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public:
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SkSVGLengthContext(const SkSize& viewport, SkScalar dpi = 90)
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: fViewport(viewport), fDPI(dpi) {}
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enum class LengthType {
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kHorizontal,
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kVertical,
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kOther,
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};
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const SkSize& viewPort() const { return fViewport; }
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void setViewPort(const SkSize& viewport) { fViewport = viewport; }
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SkScalar resolve(const SkSVGLength&, LengthType) const;
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SkRect resolveRect(const SkSVGLength& x, const SkSVGLength& y,
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const SkSVGLength& w, const SkSVGLength& h) const;
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private:
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SkSize fViewport;
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SkScalar fDPI;
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};
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struct SkSVGPresentationContext {
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SkSVGPresentationContext();
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SkSVGPresentationContext(const SkSVGPresentationContext&) = default;
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SkSVGPresentationContext& operator=(const SkSVGPresentationContext&) = default;
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// Inherited presentation attributes, computed for the current node.
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SkSVGPresentationAttributes fInherited;
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// Cached paints, reflecting the current presentation attributes.
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SkPaint fFillPaint;
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SkPaint fStrokePaint;
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};
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class SkSVGRenderContext {
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public:
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SkSVGRenderContext(SkCanvas*, const SkSVGIDMapper&, const SkSVGLengthContext&,
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const SkSVGPresentationContext&);
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SkSVGRenderContext(const SkSVGRenderContext&);
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~SkSVGRenderContext();
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const SkSVGLengthContext& lengthContext() const { return *fLengthContext; }
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SkSVGLengthContext* writableLengthContext() { return fLengthContext.writable(); }
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SkCanvas* canvas() const { return fCanvas; }
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enum ApplyFlags {
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kLeaf = 1 << 0, // the target node doesn't have descendants
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};
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void applyPresentationAttributes(const SkSVGPresentationAttributes&, uint32_t flags);
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const SkSVGNode* findNodeById(const SkString&) const;
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const SkPaint* fillPaint() const;
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const SkPaint* strokePaint() const;
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private:
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// Stack-only
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void* operator new(size_t) = delete;
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void* operator new(size_t, void*) = delete;
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SkSVGRenderContext& operator=(const SkSVGRenderContext&) = delete;
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void applyOpacity(SkScalar opacity, uint32_t flags);
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const SkSVGIDMapper& fIDMapper;
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SkTCopyOnFirstWrite<SkSVGLengthContext> fLengthContext;
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SkTCopyOnFirstWrite<SkSVGPresentationContext> fPresentationContext;
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SkCanvas* fCanvas;
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// The save count on 'fCanvas' at construction time.
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// A restoreToCount() will be issued on destruction.
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int fCanvasSaveCount;
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};
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#endif // SkSVGRenderContext_DEFINED
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