Auto merge of #18242 - joone:ellipse, r=jdm

Implement Ellipse Canvas 2D API

This patch needs to update rust-azure to 0.21.0.

- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #17598

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- [] There are tests for these changes OR
- [] These changes do not require tests because _____

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components/canvas/canvas_paint_thread.rs

@@ -173,6 +173,9 @@ impl<'a> CanvasPaintThread<'a> {
                             Canvas2dMsg::ArcTo(ref cp1, ref cp2, radius) => {
                                 painter.arc_to(cp1, cp2, radius)
                             }
+                            Canvas2dMsg::Ellipse(ref center, radius_x, radius_y, rotation, start, end, ccw) => {
+                                painter.ellipse(center, radius_x, radius_y, rotation, start, end, ccw)
+                            }
                             Canvas2dMsg::RestoreContext => painter.restore_context_state(),
                             Canvas2dMsg::SaveContext => painter.save_context_state(),
                             Canvas2dMsg::SetFillStyle(style) => painter.set_fill_style(style),
@@ -501,6 +504,17 @@ impl<'a> CanvasPaintThread<'a> {
         }
     }
 
+    fn ellipse(&mut self,
+           center: &Point2D<AzFloat>,
+           radius_x: AzFloat,
+           radius_y: AzFloat,
+           rotation_angle: AzFloat,
+           start_angle: AzFloat,
+           end_angle: AzFloat,
+           ccw: bool) {
+        self.path_builder.ellipse(*center, radius_x, radius_y, rotation_angle, start_angle, end_angle, ccw);
+    }
+
     fn set_fill_style(&mut self, style: FillOrStrokeStyle) {
         if let Some(pattern) = style.to_azure_pattern(&self.drawtarget) {
             self.state.fill_style = pattern

components/canvas_traits/canvas.rs

@@ -42,6 +42,7 @@ pub enum Canvas2dMsg {
     ClearRect(Rect<f32>),
     Clip,
     ClosePath,
+    Ellipse(Point2D<f32>, f32, f32, f32, f32, f32, bool),
     Fill,
     FillText(String, f64, f64, Option<f64>),
     FillRect(Rect<f32>),

components/script/dom/canvasrenderingcontext2d.rs

@@ -957,6 +957,26 @@ impl CanvasRenderingContext2DMethods for CanvasRenderingContext2D {
         Ok(())
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-context-2d-ellipse
+    fn Ellipse(&self, x: f64, y: f64, rx: f64, ry: f64, rotation: f64, start: f64, end: f64, ccw: bool) -> ErrorResult {
+        if !([x, y, rx, ry, rotation, start, end].iter().all(|x| x.is_finite())) {
+            return Ok(());
+        }
+        if rx < 0.0 || ry < 0.0 {
+            return Err(Error::IndexSize);
+        }
+
+        let msg = CanvasMsg::Canvas2d(Canvas2dMsg::Ellipse(Point2D::new(x as f32, y as f32),
+                                                       rx as f32,
+                                                       ry as f32,
+                                                       rotation as f32,
+                                                       start as f32,
+                                                       end as f32,
+                                                       ccw));
+        self.ipc_renderer.send(msg).unwrap();
+        Ok(())
+    }
+
     // https://html.spec.whatwg.org/multipage/#dom-context-2d-imagesmoothingenabled
     fn ImageSmoothingEnabled(&self) -> bool {
         let state = self.state.borrow();

components/script/dom/paintrenderingcontext2d.rs

@@ -263,6 +263,11 @@ impl PaintRenderingContext2DMethods for PaintRenderingContext2D {
         self.context.ArcTo(cp1x, cp1y, cp2x, cp2y, r)
     }
 
+    // https://html.spec.whatwg.org/multipage/#dom-context-2d-ellipse
+    fn Ellipse(&self, x: f64, y: f64, rx: f64, ry: f64, rotation: f64, start: f64, end: f64, ccw: bool) -> ErrorResult {
+        self.context.Ellipse(x, y, rx, ry, rotation, start, end, ccw)
+    }
+
     // https://html.spec.whatwg.org/multipage/#dom-context-2d-imagesmoothingenabled
     fn ImageSmoothingEnabled(&self) -> bool {
         self.context.ImageSmoothingEnabled()

components/script/dom/webidls/CanvasRenderingContext2D.webidl

@@ -264,4 +264,9 @@ interface CanvasPath {
   // [LenientFloat] void ellipse(double x, double y, double radiusX, double radiusY,
   //                             double rotation, double startAngle, double endAngle,
   //                             boolean anticlockwise);
+
+  [Throws]
+  void ellipse(unrestricted double x, unrestricted double y, unrestricted double radius_x,
+               unrestricted double radius_y, unrestricted double rotation, unrestricted double startAngle,
+               unrestricted double endAngle, optional boolean anticlockwise = false);
 };