diff options
| author | Vito Caputo <vcaputo@pengaru.com> | 2023-08-12 18:09:20 -0700 |
|---|---|---|
| committer | Vito Caputo <vcaputo@pengaru.com> | 2023-08-12 21:49:30 -0700 |
| commit | be6d4f83b96be034e393d6ef83d57a944ae16067 (patch) | |
| tree | 94b702f7cdf6fbf3eaaa56beee1fb01f6e8a5d07 /src/til.h | |
| parent | bc9b657747095dc84266578f457b821f669e15d8 (diff) | |
modules/checkers: fix clipping bug in fragmenter
The existing code wasn't clipping correctly to the right/bottom
edges of the incoming fragment when the xoff/yoff was 0 but
xshift/yshift non-zero. In that case the incoming fragment bound
was unintentionally being enlarged, resulting in an overrun when
the such a cell was filled/cleared.
It was discovered watching montage under rtv, which stumbled
across running checkers w/size=128 on a montage tile of 128x96.
The height/y coords of the single checker cell filling the whole
montage tile weren't getting clamped properly down to the 96-tall
tile.
The shifting for centering checkers introduced some really
annoying arithmetic in this fragmenter.
Diffstat (limited to 'src/til.h')
0 files changed, 0 insertions, 0 deletions