Auto merge of #24524 - bblanke:consolidate-size-helpers, r=jdm

Make offscreen canvas rendering context use offscreen canvas' size; Consolidate size helpers

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Addresses issues raised in the review of PR #24518 and includes changes to 17 tests' metadata for those that now PASS.

Contains fixes in PR #24518:

Updated the offscreen canvas rendering context to use the offscreen canvas' size. This involved upgrading several methods to accept u64 sizes.

Additionally, the code in OffscreenCanvas::SetWidth() and OffscreenCanvas::SetHeight() was updated to send CanvasMsg::Recreate to the canvas paint thread.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `___` with appropriate data: -->
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #24465 and fix #24536

<!-- Either: -->
- [X] There are tests for these changes – 17 were updated to PASS

1 files changed, 12 insertions, 2 deletions

diff --git a/components/script/dom/imagedata.rs b/components/script/dom/imagedata.rs
index d89e5e36d1b..b09984e267f 100644
--- a/components/script/dom/imagedata.rs
+++ b/components/script/dom/imagedata.rs
@@ -169,8 +169,8 @@ impl ImageData {
     }
 
     #[allow(unsafe_code)]
-    pub unsafe fn get_rect(&self, rect: Rect<u32>) -> Cow<[u8]> {
-        pixels::rgba8_get_rect(self.as_slice(), self.get_size(), rect)
+    pub unsafe fn get_rect(&self, rect: Rect<u64>) -> Cow<[u8]> {
+        pixels::rgba8_get_rect(self.as_slice(), self.get_size().to_u64(), rect)
     }
 
     pub fn get_size(&self) -> Size2D<u32> {
@@ -194,3 +194,13 @@ impl ImageDataMethods for ImageData {
         NonNull::new(self.data.get()).expect("got a null pointer")
     }
 }
+
+pub trait Size2DExt {
+    fn to_u64(&self) -> Size2D<u64>;
+}
+
+impl Size2DExt for Size2D<u32> {
+    fn to_u64(&self) -> Size2D<u64> {
+        return Size2D::new(self.width as u64, self.height as u64);
+    }
+}