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/*
* Copyright 2020 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSVGFe_DEFINED
#define SkSVGFe_DEFINED
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/private/base/SkAPI.h"
#include "modules/svg/include/SkSVGHiddenContainer.h"
#include "modules/svg/include/SkSVGNode.h"
#include "modules/svg/include/SkSVGTypes.h"
#include "src/base/SkTLazy.h"
#include <vector>
class SkImageFilter;
class SkSVGFilterContext;
class SkSVGRenderContext;
class SK_API SkSVGFe : public SkSVGHiddenContainer {
public:
static bool IsFilterEffect(const sk_sp<SkSVGNode>& node) {
switch (node->tag()) {
case SkSVGTag::kFeBlend:
case SkSVGTag::kFeColorMatrix:
case SkSVGTag::kFeComponentTransfer:
case SkSVGTag::kFeComposite:
case SkSVGTag::kFeDiffuseLighting:
case SkSVGTag::kFeDisplacementMap:
case SkSVGTag::kFeFlood:
case SkSVGTag::kFeGaussianBlur:
case SkSVGTag::kFeImage:
case SkSVGTag::kFeMerge:
case SkSVGTag::kFeMorphology:
case SkSVGTag::kFeOffset:
case SkSVGTag::kFeSpecularLighting:
case SkSVGTag::kFeTurbulence:
return true;
default:
return false;
}
}
sk_sp<SkImageFilter> makeImageFilter(const SkSVGRenderContext& ctx,
const SkSVGFilterContext& fctx) const;
// https://www.w3.org/TR/SVG11/filters.html#FilterPrimitiveSubRegion
SkRect resolveFilterSubregion(const SkSVGRenderContext&, const SkSVGFilterContext&) const;
/**
* Resolves the colorspace within which this filter effect should be applied.
* Spec: https://www.w3.org/TR/SVG11/painting.html#ColorInterpolationProperties
* 'color-interpolation-filters' property.
*/
virtual SkSVGColorspace resolveColorspace(const SkSVGRenderContext&,
const SkSVGFilterContext&) const;
/** Propagates any inherited presentation attributes in the given context. */
void applyProperties(SkSVGRenderContext*) const;
SVG_ATTR(In, SkSVGFeInputType, SkSVGFeInputType())
SVG_ATTR(Result, SkSVGStringType, SkSVGStringType())
SVG_OPTIONAL_ATTR(X, SkSVGLength)
SVG_OPTIONAL_ATTR(Y, SkSVGLength)
SVG_OPTIONAL_ATTR(Width, SkSVGLength)
SVG_OPTIONAL_ATTR(Height, SkSVGLength)
protected:
explicit SkSVGFe(SkSVGTag t) : INHERITED(t) {}
virtual sk_sp<SkImageFilter> onMakeImageFilter(const SkSVGRenderContext&,
const SkSVGFilterContext&) const = 0;
virtual std::vector<SkSVGFeInputType> getInputs() const = 0;
bool parseAndSetAttribute(const char*, const char*) override;
private:
/**
* Resolves the rect specified by the x, y, width and height attributes (if specified) on this
* filter effect. These attributes are resolved according to the given length context and
* the value of 'primitiveUnits' on the parent <filter> element.
*/
SkRect resolveBoundaries(const SkSVGRenderContext&, const SkSVGFilterContext&) const;
using INHERITED = SkSVGHiddenContainer;
};
#endif // SkSVGFe_DEFINED
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