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      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 "SkSVGEllipse.h"
     10 #include "SkSVGRenderContext.h"
     11 #include "SkSVGValue.h"
     12 
     13 SkSVGEllipse::SkSVGEllipse() : INHERITED(SkSVGTag::kEllipse) {}
     14 
     15 void SkSVGEllipse::setCx(const SkSVGLength& cx) {
     16     fCx = cx;
     17 }
     18 
     19 void SkSVGEllipse::setCy(const SkSVGLength& cy) {
     20     fCy = cy;
     21 }
     22 
     23 void SkSVGEllipse::setRx(const SkSVGLength& rx) {
     24     fRx = rx;
     25 }
     26 
     27 void SkSVGEllipse::setRy(const SkSVGLength& ry) {
     28     fRy = ry;
     29 }
     30 
     31 void SkSVGEllipse::onSetAttribute(SkSVGAttribute attr, const SkSVGValue& v) {
     32     switch (attr) {
     33     case SkSVGAttribute::kCx:
     34         if (const auto* cx = v.as<SkSVGLengthValue>()) {
     35             this->setCx(*cx);
     36         }
     37         break;
     38     case SkSVGAttribute::kCy:
     39         if (const auto* cy = v.as<SkSVGLengthValue>()) {
     40             this->setCy(*cy);
     41         }
     42         break;
     43     case SkSVGAttribute::kRx:
     44         if (const auto* rx = v.as<SkSVGLengthValue>()) {
     45             this->setRx(*rx);
     46         }
     47         break;
     48     case SkSVGAttribute::kRy:
     49         if (const auto* ry = v.as<SkSVGLengthValue>()) {
     50             this->setRy(*ry);
     51         }
     52         break;
     53     default:
     54         this->INHERITED::onSetAttribute(attr, v);
     55     }
     56 }
     57 
     58 SkRect SkSVGEllipse::resolve(const SkSVGLengthContext& lctx) const {
     59     const auto cx = lctx.resolve(fCx, SkSVGLengthContext::LengthType::kHorizontal);
     60     const auto cy = lctx.resolve(fCy, SkSVGLengthContext::LengthType::kVertical);
     61     const auto rx = lctx.resolve(fRx, SkSVGLengthContext::LengthType::kHorizontal);
     62     const auto ry = lctx.resolve(fRy, SkSVGLengthContext::LengthType::kVertical);
     63 
     64     return (rx > 0 && ry > 0)
     65         ? SkRect::MakeXYWH(cx - rx, cy - ry, rx * 2, ry * 2)
     66         : SkRect::MakeEmpty();
     67 }
     68 
     69 void SkSVGEllipse::onDraw(SkCanvas* canvas, const SkSVGLengthContext& lctx,
     70                           const SkPaint& paint, SkPath::FillType) const {
     71     canvas->drawOval(this->resolve(lctx), paint);
     72 }
     73 
     74 SkPath SkSVGEllipse::onAsPath(const SkSVGRenderContext& ctx) const {
     75     SkPath path;
     76     path.addOval(this->resolve(ctx.lengthContext()));
     77     this->mapToParent(&path);
     78 
     79     return path;
     80 }
     81