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canvas: Port CanvasMsg channel to generic channel (#39348)

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Additionally also improve the warning message if the routed receiver
disconnects and exit the thread.
If the routed receiver disconnects, we can't receive any canvas messages
anymore, and any control messages can't remedy that, so we might as well
exit.

Testing: Channel changes are covered by existing tests. Exiting the
canvas thread if the routed thread disconnects is not tested, and needs
reviewer attention.
Part of https://github.com/servo/servo/issues/38912

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
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Jonathan Schwender 2025-09-18 08:06:08 +08:00 • committed by GitHub
parent 76645e5e26
commit 666b17a9a1
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4 changed files with 23 additions and 18 deletions
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2
components/shared/constellation/from_script_message.rs
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@ -542,7 +542,7 @@ pub enum ScriptToConstellationMessage {
/// 2D canvases may use the GPU and we don't want to give untrusted content access to the GPU.)
CreateCanvasPaintThread(
UntypedSize2D<u64>,
IpcSender<Option<(IpcSender<CanvasMsg>, CanvasId, ImageKey)>>,
IpcSender<Option<(GenericSender<CanvasMsg>, CanvasId, ImageKey)>>,
),
/// Notifies the constellation that this pipeline is requesting focus.
///