7bb85dbb5e
The default colorspace for filter effects is linear RGB, as specified in https://www.w3.org/TR/SVG11/painting.html#ColorInterpolationProperties. Currently we perform all filtering in the destination colorspace. This CL adds the new presentation attribute with the default setting (according to the spec) of linear RGB. This CL does not actually implement any colorspace transformations for filters. Bug: skia:10841 Change-Id: Id778ad3fa5cb6e0aed756584a50880edd9d82e2b Reviewed-on: https://skia-review.googlesource.com/c/skia/+/352738 Commit-Queue: Tyler Denniston <tdenniston@google.com> Reviewed-by: Florin Malita <fmalita@chromium.org>
208 lines
9.5 KiB
C++
208 lines
9.5 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 SkSVGNode_DEFINED
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#define SkSVGNode_DEFINED
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#include "include/core/SkRefCnt.h"
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#include "modules/svg/include/SkSVGAttribute.h"
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#include "modules/svg/include/SkSVGAttributeParser.h"
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class SkCanvas;
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class SkMatrix;
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class SkPaint;
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class SkPath;
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class SkSVGLengthContext;
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class SkSVGRenderContext;
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class SkSVGValue;
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enum class SkSVGTag {
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kCircle,
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kClipPath,
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kDefs,
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kEllipse,
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kFeColorMatrix,
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kFeComposite,
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kFeFlood,
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kFeGaussianBlur,
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kFeTurbulence,
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kFilter,
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kG,
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kLine,
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kLinearGradient,
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kMask,
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kPath,
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kPattern,
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kPolygon,
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kPolyline,
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kRadialGradient,
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kRect,
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kStop,
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kSvg,
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kText,
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kTextLiteral,
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kTextPath,
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kTSpan,
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kUse
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};
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#define SVG_PRES_ATTR(attr_name, attr_type, attr_inherited) \
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private: \
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bool set##attr_name(SkSVGAttributeParser::ParseResult< \
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SkSVGProperty<attr_type, attr_inherited>>&& pr) {\
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if (pr.isValid()) { this->set##attr_name(std::move(*pr)); } \
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return pr.isValid(); \
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} \
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\
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public: \
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const SkSVGProperty<attr_type, attr_inherited>& get##attr_name() const { \
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return fPresentationAttributes.f##attr_name; \
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} \
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void set##attr_name(const SkSVGProperty<attr_type, attr_inherited>& v) { \
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auto* dest = &fPresentationAttributes.f##attr_name; \
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if (!dest->isInheritable() || v.isValue()) { \
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/* TODO: If dest is not inheritable, handle v == "inherit" */ \
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*dest = v; \
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} else { \
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dest->set(SkSVGPropertyState::kInherit); \
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} \
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} \
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void set##attr_name(SkSVGProperty<attr_type, attr_inherited>&& v) { \
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auto* dest = &fPresentationAttributes.f##attr_name; \
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if (!dest->isInheritable() || v.isValue()) { \
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/* TODO: If dest is not inheritable, handle v == "inherit" */ \
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*dest = std::move(v); \
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} else { \
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dest->set(SkSVGPropertyState::kInherit); \
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} \
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}
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class SkSVGNode : public SkRefCnt {
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public:
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~SkSVGNode() override;
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SkSVGTag tag() const { return fTag; }
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virtual void appendChild(sk_sp<SkSVGNode>) = 0;
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void render(const SkSVGRenderContext&) const;
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bool asPaint(const SkSVGRenderContext&, SkPaint*) const;
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SkPath asPath(const SkSVGRenderContext&) const;
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SkRect objectBoundingBox(const SkSVGRenderContext&) const;
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void setAttribute(SkSVGAttribute, const SkSVGValue&);
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bool setAttribute(const char* attributeName, const char* attributeValue);
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// TODO: consolidate with existing setAttribute
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virtual bool parseAndSetAttribute(const char* name, const char* value);
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// inherited
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SVG_PRES_ATTR(ClipRule , SkSVGFillRule , true)
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SVG_PRES_ATTR(Color , SkSVGColorType , true)
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SVG_PRES_ATTR(ColorInterpolationFilters, SkSVGColorspace, true)
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SVG_PRES_ATTR(FillRule , SkSVGFillRule , true)
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SVG_PRES_ATTR(Fill , SkSVGPaint , true)
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SVG_PRES_ATTR(FillOpacity , SkSVGNumberType, true)
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SVG_PRES_ATTR(FontFamily , SkSVGFontFamily, true)
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SVG_PRES_ATTR(FontSize , SkSVGFontSize , true)
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SVG_PRES_ATTR(FontStyle , SkSVGFontStyle , true)
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SVG_PRES_ATTR(FontWeight , SkSVGFontWeight, true)
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SVG_PRES_ATTR(Stroke , SkSVGPaint , true)
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SVG_PRES_ATTR(StrokeDashArray , SkSVGDashArray , true)
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SVG_PRES_ATTR(StrokeDashOffset , SkSVGLength , true)
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SVG_PRES_ATTR(StrokeLineCap , SkSVGLineCap , true)
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SVG_PRES_ATTR(StrokeLineJoin , SkSVGLineJoin , true)
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SVG_PRES_ATTR(StrokeMiterLimit , SkSVGNumberType, true)
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SVG_PRES_ATTR(StrokeOpacity , SkSVGNumberType, true)
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SVG_PRES_ATTR(StrokeWidth , SkSVGLength , true)
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SVG_PRES_ATTR(TextAnchor , SkSVGTextAnchor, true)
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SVG_PRES_ATTR(Visibility , SkSVGVisibility, true)
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// not inherited
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SVG_PRES_ATTR(ClipPath , SkSVGFuncIRI , false)
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SVG_PRES_ATTR(Mask , SkSVGFuncIRI , false)
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SVG_PRES_ATTR(Filter , SkSVGFuncIRI , false)
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SVG_PRES_ATTR(Opacity , SkSVGNumberType, false)
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SVG_PRES_ATTR(StopColor , SkSVGColor , false)
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SVG_PRES_ATTR(StopOpacity , SkSVGNumberType, false)
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SVG_PRES_ATTR(FloodColor , SkSVGColor , false)
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SVG_PRES_ATTR(FloodOpacity , SkSVGNumberType, false)
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protected:
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SkSVGNode(SkSVGTag);
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// Called before onRender(), to apply local attributes to the context. Unlike onRender(),
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// onPrepareToRender() bubbles up the inheritance chain: overriders should always call
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// INHERITED::onPrepareToRender(), unless they intend to short-circuit rendering
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// (return false).
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// Implementations are expected to return true if rendering is to continue, or false if
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// the node/subtree rendering is disabled.
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virtual bool onPrepareToRender(SkSVGRenderContext*) const;
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virtual void onRender(const SkSVGRenderContext&) const = 0;
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virtual bool onAsPaint(const SkSVGRenderContext&, SkPaint*) const { return false; }
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virtual SkPath onAsPath(const SkSVGRenderContext&) const = 0;
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virtual void onSetAttribute(SkSVGAttribute, const SkSVGValue&) {}
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virtual bool hasChildren() const { return false; }
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virtual SkRect onObjectBoundingBox(const SkSVGRenderContext&) const {
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return SkRect::MakeEmpty();
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}
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private:
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SkSVGTag fTag;
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// FIXME: this should be sparse
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SkSVGPresentationAttributes fPresentationAttributes;
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using INHERITED = SkRefCnt;
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};
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#undef SVG_PRES_ATTR // presentation attributes are only defined for the base class
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#define _SVG_ATTR_SETTERS(attr_name, attr_type, attr_default, set_cp, set_mv) \
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private: \
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bool set##attr_name( \
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const SkSVGAttributeParser::ParseResult<attr_type>& pr) { \
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if (pr.isValid()) { this->set##attr_name(*pr); } \
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return pr.isValid(); \
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} \
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bool set##attr_name( \
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SkSVGAttributeParser::ParseResult<attr_type>&& pr) { \
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if (pr.isValid()) { this->set##attr_name(std::move(*pr)); } \
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return pr.isValid(); \
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} \
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public: \
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void set##attr_name(const attr_type& a) { set_cp(a); } \
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void set##attr_name(attr_type&& a) { set_mv(std::move(a)); }
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#define SVG_ATTR(attr_name, attr_type, attr_default) \
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private: \
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attr_type f##attr_name = attr_default; \
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public: \
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const attr_type& get##attr_name() const { return f##attr_name; } \
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_SVG_ATTR_SETTERS( \
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attr_name, attr_type, attr_default, \
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[this](const attr_type& a) { this->f##attr_name = a; }, \
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[this](attr_type&& a) { this->f##attr_name = std::move(a); })
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#define SVG_OPTIONAL_ATTR(attr_name, attr_type) \
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private: \
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SkTLazy<attr_type> f##attr_name; \
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public: \
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const SkTLazy<attr_type>& get##attr_name() const { return f##attr_name; } \
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_SVG_ATTR_SETTERS( \
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attr_name, attr_type, attr_default, \
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[this](const attr_type& a) { this->f##attr_name.set(a); }, \
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[this](attr_type&& a) { this->f##attr_name.set(std::move(a)); })
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#endif // SkSVGNode_DEFINED
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