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>
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
/*
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* Copyright 2020 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 SkSVGFe_DEFINED
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#define SkSVGFe_DEFINED
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#include <vector>
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#include "modules/svg/include/SkSVGHiddenContainer.h"
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class SkImageFilter;
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class SkSVGFilterContext;
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class SkSVGFe : public SkSVGHiddenContainer {
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public:
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static bool IsFilterEffect(const sk_sp<SkSVGNode>& node) {
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return node->tag() == SkSVGTag::kFeTurbulence || node->tag() == SkSVGTag::kFeColorMatrix ||
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node->tag() == SkSVGTag::kFeComposite || node->tag() == SkSVGTag::kFeFlood ||
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node->tag() == SkSVGTag::kFeGaussianBlur;
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}
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sk_sp<SkImageFilter> makeImageFilter(const SkSVGRenderContext& ctx,
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const SkSVGFilterContext& fctx) const;
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// https://www.w3.org/TR/SVG11/filters.html#FilterPrimitiveSubRegion
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SkRect resolveFilterSubregion(const SkSVGRenderContext&, const SkSVGFilterContext&) const;
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/**
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* Resolves the colorspace within which this filter effect should be applied.
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* Spec: https://www.w3.org/TR/SVG11/painting.html#ColorInterpolationProperties
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* 'color-interpolation-filters' property.
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*/
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SkSVGColorspace resolveColorspace(const SkSVGRenderContext&) const;
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/** Propagates any inherited presentation attributes in the given context. */
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void applyProperties(SkSVGRenderContext*) const;
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SVG_ATTR(In, SkSVGFeInputType, SkSVGFeInputType(SkSVGFeInputType::Type::kSourceGraphic))
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SVG_ATTR(Result, SkSVGStringType, SkSVGStringType())
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SVG_OPTIONAL_ATTR(X, SkSVGLength)
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SVG_OPTIONAL_ATTR(Y, SkSVGLength)
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SVG_OPTIONAL_ATTR(Width, SkSVGLength)
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SVG_OPTIONAL_ATTR(Height, SkSVGLength)
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protected:
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explicit SkSVGFe(SkSVGTag t) : INHERITED(t) {}
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virtual sk_sp<SkImageFilter> onMakeImageFilter(const SkSVGRenderContext&,
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const SkSVGFilterContext&) const = 0;
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virtual std::vector<SkSVGFeInputType> getInputs() const = 0;
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bool parseAndSetAttribute(const char*, const char*) override;
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private:
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/**
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* Resolves the rect specified by the x, y, width and height attributes (if specified) on this
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* filter effect. These attributes are resolved according to the given length context and
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* the value of 'primitiveUnits' on the parent <filter> element.
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*/
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SkRect resolveBoundaries(const SkSVGRenderContext&, const SkSVGFilterContext&) const;
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using INHERITED = SkSVGHiddenContainer;
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};
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#endif // SkSVGFe_DEFINED
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