397a517d1a
The main feature is <svg> viewBox and proper viewport support, but the CL touches a few other things: * refactor SkSVGRenderContext to auto-restore canvas state, and split the presentation bits into a separate CoW SkSVGPresentationContext * introduce SkSVGNode::onPrepareToRender(), as a way for nodes to push their custom state before the actual onRender() call (instead of relying on non-virtual SkSVGNode to know about all possible state bits) * add a "Type" suffix to SVG types, to disambiguate (e.g. SkSVGRectType vs. SkSVGRect) R=robertphillips@google.com,stephana@google.com GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2222793002 Review-Url: https://codereview.chromium.org/2222793002
95 lines
2.8 KiB
C++
95 lines
2.8 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 "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) : fViewport(viewport) {}
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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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};
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class SkSVGPresentationContext {
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public:
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SkSVGPresentationContext();
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SkSVGPresentationContext(const SkSVGPresentationContext&);
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SkSVGPresentationContext& operator=(const SkSVGPresentationContext&);
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const SkPaint* fillPaint() const { return fFill.getMaybeNull(); }
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const SkPaint* strokePaint() const { return fStroke.getMaybeNull(); }
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void setFillColor(SkColor);
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void setStrokeColor(SkColor);
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private:
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void initFrom(const SkSVGPresentationContext&);
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SkPaint& ensureFill();
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SkPaint& ensureStroke();
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// TODO: convert to regular SkPaints and track explicit attribute values instead.
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SkTLazy<SkPaint> fFill;
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SkTLazy<SkPaint> fStroke;
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};
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class SkSVGRenderContext {
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public:
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SkSVGRenderContext(SkCanvas*, const SkSVGLengthContext&, 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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const SkSVGPresentationContext& presentationContext() const { return *fPresentationContext; }
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SkSVGPresentationContext* writablePresentationContext() {
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return fPresentationContext.writable();
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}
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SkCanvas* canvas() const { return fCanvas; }
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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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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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