1 /*
2 * Copyright 2020 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "include/effects/SkImageFilters.h"
9 #include "modules/svg/include/SkSVGAttributeParser.h"
10 #include "modules/svg/include/SkSVGFeMorphology.h"
11 #include "modules/svg/include/SkSVGFilterContext.h"
12 #include "modules/svg/include/SkSVGRenderContext.h"
13 #include "modules/svg/include/SkSVGValue.h"
14
parseAndSetAttribute(const char * name,const char * value)15 bool SkSVGFeMorphology::parseAndSetAttribute(const char* name, const char* value) {
16 return INHERITED::parseAndSetAttribute(name, value) ||
17 this->setOperator(SkSVGAttributeParser::parse<SkSVGFeMorphology::Operator>(
18 "operator", name, value)) ||
19 this->setRadius(SkSVGAttributeParser::parse<SkSVGFeMorphology::Radius>(
20 "radius", name, value));
21 }
22
onMakeImageFilter(const SkSVGRenderContext & ctx,const SkSVGFilterContext & fctx) const23 sk_sp<SkImageFilter> SkSVGFeMorphology::onMakeImageFilter(const SkSVGRenderContext& ctx,
24 const SkSVGFilterContext& fctx) const {
25 const SkRect cropRect = this->resolveFilterSubregion(ctx, fctx);
26 const SkSVGColorspace colorspace = this->resolveColorspace(ctx, fctx);
27 sk_sp<SkImageFilter> input = fctx.resolveInput(ctx, this->getIn(), colorspace);
28
29 const auto r = SkV2{fRadius.fX, fRadius.fY}
30 * ctx.transformForCurrentOBB(fctx.primitiveUnits()).scale;
31 switch (fOperator) {
32 case Operator::kErode:
33 return SkImageFilters::Erode(r.x, r.y, input, cropRect);
34 case Operator::kDilate:
35 return SkImageFilters::Dilate(r.x, r.y, input, cropRect);
36 }
37
38 SkUNREACHABLE;
39 }
40
41 template <>
parse(SkSVGFeMorphology::Operator * op)42 bool SkSVGAttributeParser::parse<SkSVGFeMorphology::Operator>(SkSVGFeMorphology::Operator* op) {
43 static constexpr std::tuple<const char*, SkSVGFeMorphology::Operator> gMap[] = {
44 { "dilate", SkSVGFeMorphology::Operator::kDilate },
45 { "erode" , SkSVGFeMorphology::Operator::kErode },
46 };
47
48 return this->parseEnumMap(gMap, op) && this->parseEOSToken();
49 }
50
51 template <>
parse(SkSVGFeMorphology::Radius * radius)52 bool SkSVGAttributeParser::parse<SkSVGFeMorphology::Radius>(SkSVGFeMorphology::Radius* radius) {
53 std::vector<SkSVGNumberType> values;
54 if (!this->parse(&values)) {
55 return false;
56 }
57
58 radius->fX = values[0];
59 radius->fY = values.size() > 1 ? values[1] : values[0];
60 return true;
61 }
62