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Avoid copying pixels in ctx.putImageData sometimes

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This commit is contained in:
Anthony Ramine 2018-10-06 02:58:45 +02:00
parent 19f40cdf0b
commit 75e6f5dfaa
6 changed files with 53 additions and 41 deletions
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5
components/script/dom/canvasrenderingcontext2d.rs
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@ -1197,6 +1197,7 @@ impl CanvasRenderingContext2DMethods for CanvasRenderingContext2D {
}
// https://html.spec.whatwg.org/multipage/#dom-context-2d-putimagedata
#[allow(unsafe_code)]
fn PutImageData_(
&self,
imagedata: &ImageData,
@ -1281,11 +1282,13 @@ impl CanvasRenderingContext2DMethods for CanvasRenderingContext2D {
let dirty_rect = Rect::new(Point2D::new(dirty_x, dirty_y), dirty_size);
// Step 7.
let (sender, receiver) = ipc::bytes_channel().unwrap();
self.send_canvas_2d_msg(Canvas2dMsg::PutImageData(
imagedata.get_rect(dirty_rect.try_cast().unwrap()).into(),
receiver,
origin.to_vector(),
dirty_size,
));
sender.send(unsafe { &imagedata.get_rect(dirty_rect.try_cast().unwrap()) }).unwrap();
self.mark_as_dirty();
}