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Fix composite "flats as patch" name overlap crash

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This commit is contained in:
Sally Coolatta 2024-05-19 03:54:00 -04:00
parent 47bcad4ab1
commit 619cf708a1
1 changed files with 95 additions and 3 deletions
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98
src/r_textures.c
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@ -1068,6 +1068,98 @@ void R_LoadTexturesPwad(UINT16 wadnum)
R_FinishLoadingTextures(newtextures);
}
static lumpnum_t W_GetTexPatchLumpNum(const char *name)
{
// Flats as a texture patch crashes horribly, and flats
// can share the same name as textures.
// But even if they worked, we want to prioritize:
// Patches -> Textures -> anything else
enum
{
USE_PATCHES,
USE_TEXTURES,
USE__MAX,
};
lumpnum_t lump = LUMPERROR;
INT32 lump_type_it;
for (lump_type_it = 0; lump_type_it < USE__MAX; lump_type_it++)
{
INT32 i;
for (i = numwadfiles - 1; i >= 0; i--) // Scan wad files backwards so patched lumps take precedent
{
lumpnum_t start = LUMPERROR;
lumpnum_t end = LUMPERROR;
switch (wadfiles[i]->type)
{
case RET_WAD:
if (lump_type_it == USE_PATCHES)
{
if ((start = W_CheckNumForMarkerStartPwad("P_START", (UINT16)i, 0)) == INT16_MAX)
continue;
else if ((end = W_CheckNumForNamePwad("P_END", (UINT16)i, start)) == INT16_MAX)
continue;
}
else if (lump_type_it == USE_TEXTURES)
{
if ((start = W_CheckNumForMarkerStartPwad("TX_START", (UINT16)i, 0)) == INT16_MAX)
continue;
else if ((end = W_CheckNumForNamePwad("TX_END", (UINT16)i, start)) == INT16_MAX)
continue;
}
break;
case RET_PK3:
case RET_FOLDER:
if (lump_type_it == USE_PATCHES)
{
if ((start = W_CheckNumForFolderStartPK3("Patches/", i, 0)) == INT16_MAX)
continue;
if ((end = W_CheckNumForFolderEndPK3("Patches/", i, start)) == INT16_MAX)
continue;
}
else if (lump_type_it == USE_TEXTURES)
{
if ((start = W_CheckNumForFolderStartPK3("Textures/", i, 0)) == INT16_MAX)
continue;
if ((end = W_CheckNumForFolderEndPK3("Textures/", i, start)) == INT16_MAX)
continue;
}
break;
default:
continue;
}
// Now find lump with specified name in that range.
lump = W_CheckNumForNamePwad(name, (UINT16)i, start);
if (lump < end)
{
lump += (i<<16); // found it, in our constraints
break;
}
lump = LUMPERROR;
}
if (lump != LUMPERROR)
{
break;
}
}
if (lump == LUMPERROR)
{
// Use whatever else you can find.
return W_GetNumForName(name);
}
return lump;
}
static texpatch_t *R_ParsePatch(boolean actuallyLoadPatch)
{
char *texturesToken;
@ -1240,13 +1332,13 @@ static texpatch_t *R_ParsePatch(boolean actuallyLoadPatch)
if (actuallyLoadPatch == true)
{
// Check lump exists
patchLumpNum = W_GetNumForName(patchName);
patchLumpNum = W_GetTexPatchLumpNum(patchName);
// If so, allocate memory for texpatch_t and fill 'er up
resultPatch = (texpatch_t *)Z_Malloc(sizeof(texpatch_t),PU_STATIC,NULL);
resultPatch->originx = patchXPos;
resultPatch->originy = patchYPos;
resultPatch->lump = patchLumpNum & 65535;
resultPatch->wad = patchLumpNum>>16;
resultPatch->lump = LUMPNUM(patchLumpNum);
resultPatch->wad = WADFILENUM(patchLumpNum);
resultPatch->flip = flip;
resultPatch->alpha = alpha;
resultPatch->style = style;