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Auto merge of #5945 - mmatyas:canvas_mxrotate, r=jdm

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This commit is contained in:
bors-servo 2015-05-06 08:53:56 -05:00
commit 3327fe3013
10 changed files with 15 additions and 45 deletions
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14
components/script/dom/canvasrenderingcontext2d.rs
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@ -355,6 +355,20 @@ impl<'a> CanvasRenderingContext2DMethods for JSRef<'a, CanvasRenderingContext2D>
self.update_transform()
}
// https://html.spec.whatwg.org/multipage/#dom-context-2d-rotate
fn Rotate(self, angle: f64) {
if angle == 0.0 || !angle.is_finite() {
return;
}
let (sin, cos) = (angle.sin(), angle.cos());
let transform = self.state.borrow().transform;
self.state.borrow_mut().transform = transform.mul(&Matrix2D::new(cos as f32, sin as f32,
-sin as f32, cos as f32,
0.0, 0.0));
self.update_transform()
}
// https://html.spec.whatwg.org/multipage/#dom-context-2d-translate
fn Translate(self, x: f64, y: f64) {
if !(x.is_finite() && y.is_finite()) {