1/*
2 * Copyright 2016 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 "SkCanvas.h"
9#include "SkSVGCircle.h"
10#include "SkSVGRenderContext.h"
11#include "SkSVGValue.h"
12
13SkSVGCircle::SkSVGCircle() : INHERITED(SkSVGTag::kCircle) {}
14
15void SkSVGCircle::setCx(const SkSVGLength& cx) {
16    fCx = cx;
17}
18
19void SkSVGCircle::setCy(const SkSVGLength& cy) {
20    fCy = cy;
21}
22
23void SkSVGCircle::setR(const SkSVGLength& r) {
24    fR = r;
25}
26
27void SkSVGCircle::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
28    switch (attr) {
29    case SkSVGAttribute::kCx:
30        if (const auto* cx = v.as<SkSVGLengthValue>()) {
31            this->setCx(*cx);
32        }
33        break;
34    case SkSVGAttribute::kCy:
35        if (const auto* cy = v.as<SkSVGLengthValue>()) {
36            this->setCy(*cy);
37        }
38        break;
39    case SkSVGAttribute::kR:
40        if (const auto* r = v.as<SkSVGLengthValue>()) {
41            this->setR(*r);
42        }
43        break;
44    default:
45        this->INHERITED::onSetAttribute(attr, v);
46    }
47}
48
49std::tuple<SkPoint, SkScalar> SkSVGCircle::resolve(const SkSVGLengthContext& lctx) const {
50    const auto cx = lctx.resolve(fCx, SkSVGLengthContext::LengthType::kHorizontal);
51    const auto cy = lctx.resolve(fCy, SkSVGLengthContext::LengthType::kVertical);
52    const auto  r = lctx.resolve(fR , SkSVGLengthContext::LengthType::kOther);
53
54    return std::make_tuple(SkPoint::Make(cx, cy), r);
55}
56void SkSVGCircle::onDraw(SkCanvas* canvas, const SkSVGLengthContext& lctx,
57                         const SkPaint& paint, SkPath::FillType) const {
58    SkPoint pos;
59    SkScalar r;
60    std::tie(pos, r) = this->resolve(lctx);
61
62    if (r > 0) {
63        canvas->drawCircle(pos.x(), pos.y(), r, paint);
64    }
65}
66
67SkPath SkSVGCircle::onAsPath(const SkSVGRenderContext& ctx) const {
68    SkPoint pos;
69    SkScalar r;
70    std::tie(pos, r) = this->resolve(ctx.lengthContext());
71
72    SkPath path;
73    path.addCircle(pos.x(), pos.y(), r);
74    this->mapToParent(&path);
75
76    return path;
77}
78