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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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37
components/script/dom/canvasrenderingcontext2d.rs
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@ -2,7 +2,6 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use canvas::canvas_paint_thread::RectToi32;
use canvas_traits::{Canvas2dMsg, CanvasCommonMsg, CanvasMsg};
use canvas_traits::{CompositionOrBlending, LineCapStyle, LineJoinStyle};
use canvas_traits::{FillOrStrokeStyle, FillRule, LinearGradientStyle, RadialGradientStyle, RepetitionStyle};
@ -363,36 +362,30 @@ impl CanvasRenderingContext2D {
let smoothing_enabled = self.state.borrow().image_smoothing_enabled;
// If the source and target canvas are the same
let msg = if &*self.canvas == canvas {
CanvasMsg::Canvas2d(Canvas2dMsg::DrawImageSelf(image_size,
dest_rect,
source_rect,
smoothing_enabled))
if &*self.canvas == canvas {
let msg = CanvasMsg::Canvas2d(Canvas2dMsg::DrawImageSelf(
image_size, dest_rect, source_rect, smoothing_enabled));
self.ipc_renderer.send(msg).unwrap();
} else {
// Source and target canvases are different
let context = match canvas.get_or_init_2d_context() {
Some(context) => context,
None => return Err(Error::InvalidState),
};
let (sender, receiver) = ipc::channel().unwrap();
let msg = CanvasMsg::Canvas2d(Canvas2dMsg::DrawImageInOther(
self.ipc_renderer.clone(),
image_size,
dest_rect,
source_rect,
smoothing_enabled,
sender));
let renderer = context.get_ipc_renderer();
let (sender, receiver) = ipc::channel::<Vec<u8>>().unwrap();
// Reads pixels from source image
renderer.send(CanvasMsg::Canvas2d(Canvas2dMsg::GetImageData(source_rect.to_i32(),
image_size,
sender)))
.unwrap();
let imagedata = receiver.recv().unwrap();
// Writes pixels to destination canvas
CanvasMsg::Canvas2d(Canvas2dMsg::DrawImage(imagedata,
source_rect.size,
dest_rect,
source_rect,
smoothing_enabled))
renderer.send(msg).unwrap();
receiver.recv().unwrap();
};
self.ipc_renderer.send(msg).unwrap();
self.mark_as_dirty();
Ok(())
}