Open Bug 1118392 Opened 9 years ago Updated 2 years ago

Reftests can not detect failures dependent on a non-zero device offset

Categories

(Core :: Layout, defect)

Product:
Core
Component:
Layout
Platform:
x86
Linux
Type:
defect

Tracking

()

People

(Reporter: kip, Unassigned)

References

Details

When reftests capture images for comparison, they are rasterized with a device offset of (0,0) resulting in false positives for bugs that only occur with a non-zero device offset.

This could be addressed by more accurately capturing the last rendered frame without re-rasterization or by including chrome in the reftest window that would introduce a device offset in the rasterization.

Bug 1067286 is an example of a regression that could not be tested due to this limitation.
Severity: normal → S3
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