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/core/SkBlendMode.h"
9 #include "include/effects/SkImageFilters.h"
10 #include "modules/svg/include/SkSVGAttributeParser.h"
11 #include "modules/svg/include/SkSVGFeBlend.h"
12 #include "modules/svg/include/SkSVGFilterContext.h"
13 #include "modules/svg/include/SkSVGRenderContext.h"
14 #include "modules/svg/include/SkSVGValue.h"
15
parseAndSetAttribute(const char * name,const char * value)16 bool SkSVGFeBlend::parseAndSetAttribute(const char* name, const char* value) {
17 return INHERITED::parseAndSetAttribute(name, value) ||
18 this->setIn2(SkSVGAttributeParser::parse<SkSVGFeInputType>("in2", name, value)) ||
19 this->setMode(SkSVGAttributeParser::parse<SkSVGFeBlend::Mode>("mode", name, value));
20 }
21
GetBlendMode(SkSVGFeBlend::Mode mode)22 static SkBlendMode GetBlendMode(SkSVGFeBlend::Mode mode) {
23 switch (mode) {
24 case SkSVGFeBlend::Mode::kNormal:
25 return SkBlendMode::kSrcOver;
26 case SkSVGFeBlend::Mode::kMultiply:
27 return SkBlendMode::kMultiply;
28 case SkSVGFeBlend::Mode::kScreen:
29 return SkBlendMode::kScreen;
30 case SkSVGFeBlend::Mode::kDarken:
31 return SkBlendMode::kDarken;
32 case SkSVGFeBlend::Mode::kLighten:
33 return SkBlendMode::kLighten;
34 }
35
36 SkUNREACHABLE;
37 }
38
onMakeImageFilter(const SkSVGRenderContext & ctx,const SkSVGFilterContext & fctx) const39 sk_sp<SkImageFilter> SkSVGFeBlend::onMakeImageFilter(const SkSVGRenderContext& ctx,
40 const SkSVGFilterContext& fctx) const {
41 const SkRect cropRect = this->resolveFilterSubregion(ctx, fctx);
42 const SkBlendMode blendMode = GetBlendMode(this->getMode());
43 const SkSVGColorspace colorspace = this->resolveColorspace(ctx, fctx);
44 const sk_sp<SkImageFilter> background = fctx.resolveInput(ctx, fIn2, colorspace);
45 const sk_sp<SkImageFilter> foreground = fctx.resolveInput(ctx, this->getIn(), colorspace);
46 return SkImageFilters::Blend(blendMode, background, foreground, cropRect);
47 }
48
49 template <>
parse(SkSVGFeBlend::Mode * mode)50 bool SkSVGAttributeParser::parse<SkSVGFeBlend::Mode>(
51 SkSVGFeBlend::Mode* mode) {
52 static constexpr std::tuple<const char*, SkSVGFeBlend::Mode> gMap[] = {
53 { "normal" , SkSVGFeBlend::Mode::kNormal },
54 { "multiply", SkSVGFeBlend::Mode::kMultiply },
55 { "screen" , SkSVGFeBlend::Mode::kScreen },
56 { "darken" , SkSVGFeBlend::Mode::kDarken },
57 { "lighten" , SkSVGFeBlend::Mode::kLighten },
58 };
59
60 return this->parseEnumMap(gMap, mode) && this->parseEOSToken();
61 }
62