xref: /aosp_15_r20/external/skia/modules/svg/src/SkSVGUse.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker /*
2*c8dee2aaSAndroid Build Coastguard Worker  * Copyright 2017 Google Inc.
3*c8dee2aaSAndroid Build Coastguard Worker  *
4*c8dee2aaSAndroid Build Coastguard Worker  * Use of this source code is governed by a BSD-style license that can be
5*c8dee2aaSAndroid Build Coastguard Worker  * found in the LICENSE file.
6*c8dee2aaSAndroid Build Coastguard Worker  */
7*c8dee2aaSAndroid Build Coastguard Worker 
8*c8dee2aaSAndroid Build Coastguard Worker #include "modules/svg/include/SkSVGUse.h"
9*c8dee2aaSAndroid Build Coastguard Worker 
10*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkCanvas.h"
11*c8dee2aaSAndroid Build Coastguard Worker #include "include/core/SkScalar.h"
12*c8dee2aaSAndroid Build Coastguard Worker #include "include/private/base/SkDebug.h"
13*c8dee2aaSAndroid Build Coastguard Worker #include "modules/svg/include/SkSVGAttributeParser.h"
14*c8dee2aaSAndroid Build Coastguard Worker #include "modules/svg/include/SkSVGRenderContext.h"
15*c8dee2aaSAndroid Build Coastguard Worker 
SkSVGUse()16*c8dee2aaSAndroid Build Coastguard Worker SkSVGUse::SkSVGUse() : INHERITED(SkSVGTag::kUse) {}
17*c8dee2aaSAndroid Build Coastguard Worker 
appendChild(sk_sp<SkSVGNode>)18*c8dee2aaSAndroid Build Coastguard Worker void SkSVGUse::appendChild(sk_sp<SkSVGNode>) {
19*c8dee2aaSAndroid Build Coastguard Worker     SkDEBUGF("cannot append child nodes to this element.\n");
20*c8dee2aaSAndroid Build Coastguard Worker }
21*c8dee2aaSAndroid Build Coastguard Worker 
parseAndSetAttribute(const char * n,const char * v)22*c8dee2aaSAndroid Build Coastguard Worker bool SkSVGUse::parseAndSetAttribute(const char* n, const char* v) {
23*c8dee2aaSAndroid Build Coastguard Worker     return INHERITED::parseAndSetAttribute(n, v) ||
24*c8dee2aaSAndroid Build Coastguard Worker            this->setX(SkSVGAttributeParser::parse<SkSVGLength>("x", n, v)) ||
25*c8dee2aaSAndroid Build Coastguard Worker            this->setY(SkSVGAttributeParser::parse<SkSVGLength>("y", n, v)) ||
26*c8dee2aaSAndroid Build Coastguard Worker            this->setHref(SkSVGAttributeParser::parse<SkSVGIRI>("xlink:href", n, v));
27*c8dee2aaSAndroid Build Coastguard Worker }
28*c8dee2aaSAndroid Build Coastguard Worker 
onPrepareToRender(SkSVGRenderContext * ctx) const29*c8dee2aaSAndroid Build Coastguard Worker bool SkSVGUse::onPrepareToRender(SkSVGRenderContext* ctx) const {
30*c8dee2aaSAndroid Build Coastguard Worker     if (fHref.iri().isEmpty() || !INHERITED::onPrepareToRender(ctx)) {
31*c8dee2aaSAndroid Build Coastguard Worker         return false;
32*c8dee2aaSAndroid Build Coastguard Worker     }
33*c8dee2aaSAndroid Build Coastguard Worker 
34*c8dee2aaSAndroid Build Coastguard Worker     if (fX.value() || fY.value()) {
35*c8dee2aaSAndroid Build Coastguard Worker         // Restored when the local SkSVGRenderContext leaves scope.
36*c8dee2aaSAndroid Build Coastguard Worker         ctx->saveOnce();
37*c8dee2aaSAndroid Build Coastguard Worker         ctx->canvas()->translate(fX.value(), fY.value());
38*c8dee2aaSAndroid Build Coastguard Worker     }
39*c8dee2aaSAndroid Build Coastguard Worker 
40*c8dee2aaSAndroid Build Coastguard Worker     // TODO: width/height override for <svg> targets.
41*c8dee2aaSAndroid Build Coastguard Worker 
42*c8dee2aaSAndroid Build Coastguard Worker     return true;
43*c8dee2aaSAndroid Build Coastguard Worker }
44*c8dee2aaSAndroid Build Coastguard Worker 
onRender(const SkSVGRenderContext & ctx) const45*c8dee2aaSAndroid Build Coastguard Worker void SkSVGUse::onRender(const SkSVGRenderContext& ctx) const {
46*c8dee2aaSAndroid Build Coastguard Worker     const auto ref = ctx.findNodeById(fHref);
47*c8dee2aaSAndroid Build Coastguard Worker     if (!ref) {
48*c8dee2aaSAndroid Build Coastguard Worker         return;
49*c8dee2aaSAndroid Build Coastguard Worker     }
50*c8dee2aaSAndroid Build Coastguard Worker 
51*c8dee2aaSAndroid Build Coastguard Worker     ref->render(ctx);
52*c8dee2aaSAndroid Build Coastguard Worker }
53*c8dee2aaSAndroid Build Coastguard Worker 
onAsPath(const SkSVGRenderContext & ctx) const54*c8dee2aaSAndroid Build Coastguard Worker SkPath SkSVGUse::onAsPath(const SkSVGRenderContext& ctx) const {
55*c8dee2aaSAndroid Build Coastguard Worker     const auto ref = ctx.findNodeById(fHref);
56*c8dee2aaSAndroid Build Coastguard Worker     if (!ref) {
57*c8dee2aaSAndroid Build Coastguard Worker         return SkPath();
58*c8dee2aaSAndroid Build Coastguard Worker     }
59*c8dee2aaSAndroid Build Coastguard Worker 
60*c8dee2aaSAndroid Build Coastguard Worker     return ref->asPath(ctx);
61*c8dee2aaSAndroid Build Coastguard Worker }
62*c8dee2aaSAndroid Build Coastguard Worker 
onObjectBoundingBox(const SkSVGRenderContext & ctx) const63*c8dee2aaSAndroid Build Coastguard Worker SkRect SkSVGUse::onObjectBoundingBox(const SkSVGRenderContext& ctx) const {
64*c8dee2aaSAndroid Build Coastguard Worker     const auto ref = ctx.findNodeById(fHref);
65*c8dee2aaSAndroid Build Coastguard Worker     if (!ref) {
66*c8dee2aaSAndroid Build Coastguard Worker         return SkRect::MakeEmpty();
67*c8dee2aaSAndroid Build Coastguard Worker     }
68*c8dee2aaSAndroid Build Coastguard Worker 
69*c8dee2aaSAndroid Build Coastguard Worker     const SkSVGLengthContext& lctx = ctx.lengthContext();
70*c8dee2aaSAndroid Build Coastguard Worker     const SkScalar x = lctx.resolve(fX, SkSVGLengthContext::LengthType::kHorizontal);
71*c8dee2aaSAndroid Build Coastguard Worker     const SkScalar y = lctx.resolve(fY, SkSVGLengthContext::LengthType::kVertical);
72*c8dee2aaSAndroid Build Coastguard Worker 
73*c8dee2aaSAndroid Build Coastguard Worker     SkRect bounds = ref->objectBoundingBox(ctx);
74*c8dee2aaSAndroid Build Coastguard Worker     bounds.offset(x, y);
75*c8dee2aaSAndroid Build Coastguard Worker 
76*c8dee2aaSAndroid Build Coastguard Worker     return bounds;
77*c8dee2aaSAndroid Build Coastguard Worker }
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