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canvas: Use stored transform instead of querying canvas paint thread (#38097)

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We already store transform in context state, so let's just use this when
querying instead of using IPC to ask canvas paint thread.

Testing: Existing WPT tests
work towards #38022

try run: https://github.com/sagudev/servo/actions/runs/16299182583

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
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sagudev 2025-07-16 16:59:10 +02:00 • committed by GitHub
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3 changed files with 1 additions and 15 deletions
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5
components/script/canvas_state.rs
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@ -1965,10 +1965,7 @@ impl CanvasState {
// https://html.spec.whatwg.org/multipage/#dom-context-2d-gettransform
pub(crate) fn get_transform(&self, global: &GlobalScope, can_gc: CanGc) -> DomRoot<DOMMatrix> {
let (sender, receiver) = ipc::channel::<Transform2D<f32>>().unwrap();
self.send_canvas_2d_msg(Canvas2dMsg::GetTransform(sender));
let transform = receiver.recv().unwrap();
let transform = self.state.borrow_mut().transform;
DOMMatrix::new(global, true, transform.cast::<f64>().to_3d(), can_gc)
}