Closed Bug 823239 Opened 12 years ago Closed 12 years ago

CSS Earth demo causing over invalidation

Categories

(Core :: Layout, defect)

Product:
Core
Component:
Layout
Platform:
x86
macOS
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED WONTFIX

People

(Reporter: BenWa, Unassigned)

References

(
URL
)

Details

It looks like we should be able to just animate layers on this page but we don't. Paint flashing shows that we redraw all the layers each frame.

https://developer.mozilla.org/en-US/demos/detail/css3-up-and-running/
The page is animating background-position on both the page (body) background, and the globe image. We don't current handle this without repainting.

Using a sliding transform animation here would fix both of those cases.

The moon is also animated by changing the following properties: margin-left, margin-top, width, height, z-index. All of which trigger repainting.

Again, most of this could be implemented using transforms.
Is this something we want to handle soon-ish or should we resolve the bug as INVALID/WONTFIX?
Fixing these would be a lot of work, and I believe most authors are already using animated transforms to move content without repainting.

Without additional evidence to the contrary, I think we shouldn't worry about this for the time being.
Status: NEW → RESOLVED
Closed: 12 years ago
Resolution: --- → WONTFIX
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