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canvas: trace/instrument canvas messages processing (#38600)

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Add some tracing/instrumenting for canvas messages processing.

Testing: We have not tests for tracing code.

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>
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sagudev 2025-08-11 20:21:49 +02:00 • committed by GitHub
parent 3f7f9ba6cd
commit 68ad03c40a
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6 changed files with 23 additions and 4 deletions
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12
components/canvas/canvas_data.rs
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@ -641,7 +641,15 @@ impl<DrawTarget: GenericDrawTarget> CanvasData<DrawTarget> {
/// Update image in WebRender
pub(crate) fn update_image_rendering(&mut self) {
let (descriptor, data) = self.drawtarget.image_descriptor_and_serializable_data();
let (descriptor, data) = {
#[cfg(feature = "tracing")]
let _span = tracing::trace_span!(
"image_descriptor_and_serializable_data",
servo_profiling = true,
)
.entered();
self.drawtarget.image_descriptor_and_serializable_data()
};
self.compositor_api
.update_image(self.image_key, descriptor, data);
@ -732,7 +740,7 @@ impl<DrawTarget: GenericDrawTarget> CanvasData<DrawTarget> {
/// It reads image data from the canvas
/// 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)]
#[servo_tracing::instrument(skip_all)]
pub(crate) fn read_pixels(&mut self, read_rect: Option<Rect<u32>>) -> Snapshot {
let canvas_size = self.drawtarget.get_size().cast();