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Make canvas send their data themselves to other canvas

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This commit is contained in:
Anthony Ramine 2016-05-28 13:53:09 +02:00
parent 2086d216dd
commit f8c3fe1076
7 changed files with 43 additions and 26 deletions
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26
components/canvas/canvas_paint_thread.rs
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@ -148,6 +148,12 @@ impl<'a> CanvasPaintThread<'a> {
Canvas2dMsg::DrawImageSelf(image_size, dest_rect, source_rect, smoothing_enabled) => {
painter.draw_image_self(image_size, dest_rect, source_rect, smoothing_enabled)
}
Canvas2dMsg::DrawImageInOther(
renderer, image_size, dest_rect, source_rect, smoothing, sender
) => {
painter.draw_image_in_other(
renderer, image_size, dest_rect, source_rect, smoothing, sender)
}
Canvas2dMsg::MoveTo(ref point) => painter.move_to(point),
Canvas2dMsg::LineTo(ref point) => painter.line_to(point),
Canvas2dMsg::Rect(ref rect) => painter.rect(rect),
@ -371,6 +377,26 @@ impl<'a> CanvasPaintThread<'a> {
}
}
fn draw_image_in_other(&self,
renderer: IpcSender<CanvasMsg>,
image_size: Size2D<f64>,
dest_rect: Rect<f64>,
source_rect: Rect<f64>,
smoothing_enabled: bool,
sender: IpcSender<()>) {
let mut image_data = self.read_pixels(source_rect.to_i32(), image_size);
// TODO: avoid double byte_swap.
byte_swap(&mut image_data);
let msg = CanvasMsg::Canvas2d(Canvas2dMsg::DrawImage(
image_data, source_rect.size, dest_rect, source_rect, smoothing_enabled));
renderer.send(msg).unwrap();
// We acknowledge to the caller here that the data was sent to the
// other canvas so that if JS immediately afterwards try to get the
// pixels of the other one, it won't retrieve the other values.
sender.send(()).unwrap();
}
fn move_to(&self, point: &Point2D<AzFloat>) {
self.path_builder.move_to(*point)
}