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Single-patch textures: print an error if patch header is missing, cease memory errors

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James R 2023-04-22 15:18:59 -07:00
parent 5085bdfdd8
commit 47411735d0
1 changed files with 21 additions and 0 deletions
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21
src/r_textures.c
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@ -295,6 +295,27 @@ UINT8 *R_GenerateTexture(size_t texnum)
wadnum = patch->wad;
lumpnum = patch->lump;
lumplength = W_LumpLengthPwad(wadnum, lumpnum);
// The header does not exist
if (lumplength < offsetof(softwarepatch_t, columnofs))
{
CONS_Alert(
CONS_ERROR,
"%.8s: texture lump data is too small. Expected %s bytes, got %s. (%s)\n",
texture->name,
sizeu1(offsetof(softwarepatch_t, columnofs)),
sizeu2(lumplength),
wadfiles[wadnum]->lumpinfo[lumpnum].fullname
);
// Allocate dummy data. Keep 4-bytes aligned.
// Column offsets will be initialized to 0, which points to the 0xff byte (empty column flag).
block = Z_Calloc(4 + (texture->width * 4), PU_CACHE, &texturecache[texnum]);
block[0] = 0xff;
texturecolumnofs[texnum] = (UINT32*)&block[4];
return block;
}
pdata = W_CacheLumpNumPwad(wadnum, lumpnum, PU_CACHE);
realpatch = (softwarepatch_t *)pdata;