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 "modules/svg/include/SkSVGFeMorphology.h"
9
10 #include "include/core/SkImageFilter.h"
11 #include "include/core/SkM44.h"
12 #include "include/core/SkRect.h"
13 #include "include/effects/SkImageFilters.h"
14 #include "include/private/base/SkAssert.h"
15 #include "modules/svg/include/SkSVGAttributeParser.h"
16 #include "modules/svg/include/SkSVGFilterContext.h"
17 #include "modules/svg/include/SkSVGRenderContext.h"
18
19 #include <tuple>
20
parseAndSetAttribute(const char * name,const char * value)21 bool SkSVGFeMorphology::parseAndSetAttribute(const char* name, const char* value) {
22 return INHERITED::parseAndSetAttribute(name, value) ||
23 this->setOperator(SkSVGAttributeParser::parse<SkSVGFeMorphology::Operator>(
24 "operator", name, value)) ||
25 this->setRadius(SkSVGAttributeParser::parse<SkSVGFeMorphology::Radius>(
26 "radius", name, value));
27 }
28
onMakeImageFilter(const SkSVGRenderContext & ctx,const SkSVGFilterContext & fctx) const29 sk_sp<SkImageFilter> SkSVGFeMorphology::onMakeImageFilter(const SkSVGRenderContext& ctx,
30 const SkSVGFilterContext& fctx) const {
31 const SkRect cropRect = this->resolveFilterSubregion(ctx, fctx);
32 const SkSVGColorspace colorspace = this->resolveColorspace(ctx, fctx);
33 sk_sp<SkImageFilter> input = fctx.resolveInput(ctx, this->getIn(), colorspace);
34
35 const auto r = SkV2{fRadius.fX, fRadius.fY}
36 * ctx.transformForCurrentOBB(fctx.primitiveUnits()).scale;
37 switch (fOperator) {
38 case Operator::kErode:
39 return SkImageFilters::Erode(r.x, r.y, input, cropRect);
40 case Operator::kDilate:
41 return SkImageFilters::Dilate(r.x, r.y, input, cropRect);
42 }
43
44 SkUNREACHABLE;
45 }
46
47 template <>
parse(SkSVGFeMorphology::Operator * op)48 bool SkSVGAttributeParser::parse<SkSVGFeMorphology::Operator>(SkSVGFeMorphology::Operator* op) {
49 static constexpr std::tuple<const char*, SkSVGFeMorphology::Operator> gMap[] = {
50 { "dilate", SkSVGFeMorphology::Operator::kDilate },
51 { "erode" , SkSVGFeMorphology::Operator::kErode },
52 };
53
54 return this->parseEnumMap(gMap, op) && this->parseEOSToken();
55 }
56
57 template <>
parse(SkSVGFeMorphology::Radius * radius)58 bool SkSVGAttributeParser::parse<SkSVGFeMorphology::Radius>(SkSVGFeMorphology::Radius* radius) {
59 std::vector<SkSVGNumberType> values;
60 if (!this->parse(&values)) {
61 return false;
62 }
63
64 radius->fX = values[0];
65 radius->fY = values.size() > 1 ? values[1] : values[0];
66 return true;
67 }
68