thirdpartymirrors/RingRacers
1
0
Fork 0
mirror of https://github.com/KartKrewDev/RingRacers.git synced 2026-04-22 10:02:01 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Clamp lindex during vissprite light calculation

Browse source 
Mitigates against negative or very large xscale values causing lindex
to evaluate < 0, preventing a potential colormap indexing-related crash.
This commit is contained in:
Eidolon 2024-01-30 17:02:17 -06:00
parent 23b565cec5
commit f4b4c664c4
1 changed files with 2 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
src/r_things.cpp
View file

@ -2538,8 +2538,8 @@ static void R_ProjectSprite(mobj_t *thing)
// diminished light
lindex = FixedMul(xscale, LIGHTRESOLUTIONFIX)>>(LIGHTSCALESHIFT);
if (lindex >= MAXLIGHTSCALE)
lindex = MAXLIGHTSCALE-1;
// Mitigate against negative xscale and arithmetic overflow
lindex = std::clamp(lindex, 0, MAXLIGHTSCALE - 1);
if (vis->cut & SC_SEMIBRIGHT)
lindex = (MAXLIGHTSCALE/2) + (lindex >> 1);