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canvas: Make GetImageData simple and only IPC message to obtain pixels (#38274)

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Currently we had `GetImageData` and `SendPixels` to obtain pixels from
script thread. This PR unifies those into single `GetImageData` that
does not need canvas size and has optional rect (for obtaining sub
image).

Testing: Existing WPT tests

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
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sagudev 2025-07-26 04:28:52 +02:00 • committed by GitHub
parent 77f85f390e
commit 8b2a5fca54
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5 changed files with 26 additions and 63 deletions
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8
components/canvas/canvas_data.rs
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@ -723,12 +723,8 @@ impl<DrawTarget: GenericDrawTarget> CanvasData<DrawTarget> {
/// canvas_size: The size of the canvas we're reading from
/// read_rect: The area of the canvas we want to read from
#[allow(unsafe_code)]
pub(crate) fn read_pixels(
&mut self,
read_rect: Option<Rect<u32>>,
canvas_size: Option<Size2D<u32>>,
) -> Snapshot {
let canvas_size = canvas_size.unwrap_or(self.drawtarget.get_size().cast());
pub(crate) fn read_pixels(&mut self, read_rect: Option<Rect<u32>>) -> Snapshot {
let canvas_size = self.drawtarget.get_size().cast();
if let Some(read_rect) = read_rect {
let canvas_rect = Rect::from_size(canvas_size);