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Drop papersprite draws that are too wide

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This prevents an arithmetic overflow when evaluating xscale, resulting
in a negative xscale.
This commit is contained in:
Eidolon 2024-01-30 17:01:09 -06:00
parent 3d10278bf2
commit 23b565cec5
1 changed files with 11 additions and 1 deletions
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12
src/r_things.cpp
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@ -2081,11 +2081,21 @@ static void R_ProjectSprite(mobj_t *thing)
if (x2 < 0)
return;
if ((range = x2 - x1) <= 0)
range = x2 - x1;
if (range < 0)
{
return;
}
range++; // fencepost problem
if (range > 32767)
{
// If the range happens to be too large for fixed_t,
// abort the draw to avoid xscale becoming negative due to arithmetic overflow.
return;
}
scalestep = ((yscale2 - yscale)/range);
if (scalestep == 0)