Canvas: implement rectangle drawing.

2 files changed, 10 insertions, 1 deletions

diff --git a/components/script/dom/canvasrenderingcontext2d.rs b/components/script/dom/canvasrenderingcontext2d.rs
index f21d23cd073..5c89b58f276 100644
--- a/components/script/dom/canvasrenderingcontext2d.rs
+++ b/components/script/dom/canvasrenderingcontext2d.rs
@@ -640,6 +640,15 @@ impl<'a> CanvasRenderingContext2DMethods for JSRef<'a, CanvasRenderingContext2D>
         self.renderer.send(CanvasMsg::Canvas2d(Canvas2dMsg::LineTo(Point2D(x as f32, y as f32)))).unwrap();
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-context-2d-rect
+    fn Rect(self, x: f64, y: f64, width: f64, height: f64) {
+        if [x, y, width, height].iter().all(|val| val.is_finite()) {
+            let rect = Rect(Point2D(x as f32, y as f32),
+                            Size2D(width as f32, height as f32));
+            self.renderer.send(CanvasMsg::Canvas2d(Canvas2dMsg::Rect(rect))).unwrap();
+        }
+    }
+
     // https://html.spec.whatwg.org/multipage/#dom-context-2d-quadraticcurveto
     fn QuadraticCurveTo(self, cpx: f64, cpy: f64, x: f64, y: f64) {
         if !(cpx.is_finite() && cpy.is_finite() &&
diff --git a/components/script/dom/webidls/CanvasRenderingContext2D.webidl b/components/script/dom/webidls/CanvasRenderingContext2D.webidl
index e1d5416f13e..44f9c707600 100644
--- a/components/script/dom/webidls/CanvasRenderingContext2D.webidl
+++ b/components/script/dom/webidls/CanvasRenderingContext2D.webidl
@@ -171,7 +171,7 @@ interface CanvasPathMethods {
              unrestricted double radius);
 // NOT IMPLEMENTED  [LenientFloat] void arcTo(double x1, double y1, double x2, double y2, double radiusX, double radiusY, double rotation);
 
-  //void rect(double x, double y, double w, double h);
+  void rect(unrestricted double x, unrestricted double y, unrestricted double w, unrestricted double h);
 
   [Throws]
   void arc(double x, double y, double radius, double startAngle, double endAngle, optional boolean anticlockwise = false);