Benjamin Otte 719021e1f4 gpu: Handle tiny offscreens ...

Due to rounding errors, it is possible after intersecting a lot of
rectangles to end up with a tiny size for an offscreen. And because we
allow an epsilon before ceil()ing to an integer (see commit afc7b46264
for details) it is now possible that we end up with a size of 0.

Avoid that by always enforcing a minimum size of 1px.

Test included

The test uses a different codepath to arrive at the same problem - it
specifies the small size instead of triggering it via rounding errors
and clipping like the original bug (and most likely the more common case
to encounter this problem.

Fixes #6656

2024-04-28 13:51:42 +02:00

83 B

20x20px

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