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/SkSVGFeGaussianBlur.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 SkSVGFeGaussianBlur::parseAndSetAttribute(const char* name, const char* value) {
16 return INHERITED::parseAndSetAttribute(name, value) ||
17 this->setStdDeviation(SkSVGAttributeParser::parse<SkSVGFeGaussianBlur::StdDeviation>(
18 "stdDeviation", name, value));
19 }
20
onMakeImageFilter(const SkSVGRenderContext & ctx,const SkSVGFilterContext & fctx) const21 sk_sp<SkImageFilter> SkSVGFeGaussianBlur::onMakeImageFilter(const SkSVGRenderContext& ctx,
22 const SkSVGFilterContext& fctx) const {
23 const auto sigma = SkV2{fStdDeviation.fX, fStdDeviation.fY}
24 * ctx.transformForCurrentOBB(fctx.primitiveUnits()).scale;
25
26 return SkImageFilters::Blur(
27 sigma.x, sigma.y,
28 fctx.resolveInput(ctx, this->getIn(), this->resolveColorspace(ctx, fctx)),
29 this->resolveFilterSubregion(ctx, fctx));
30 }
31
32 template <>
parse(SkSVGFeGaussianBlur::StdDeviation * stdDeviation)33 bool SkSVGAttributeParser::parse<SkSVGFeGaussianBlur::StdDeviation>(
34 SkSVGFeGaussianBlur::StdDeviation* stdDeviation) {
35 std::vector<SkSVGNumberType> values;
36 if (!this->parse(&values)) {
37 return false;
38 }
39
40 stdDeviation->fX = values[0];
41 stdDeviation->fY = values.size() > 1 ? values[1] : values[0];
42 return true;
43 }
44