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Merge branch 'errorifpng' into 'master'

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Error if the lump is a PNG lump

See merge request STJr/SRB2!466
This commit is contained in:
Monster Iestyn 2019-03-20 16:26:28 -04:00
commit 828691a7ac
1 changed files with 32 additions and 0 deletions
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32
src/w_wad.c
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@ -1179,6 +1179,23 @@ void zerr(int ret)
}
#endif
#define NO_PNG_LUMPS
#ifdef NO_PNG_LUMPS
static void ErrorIfPNG(UINT8 *d, size_t s, char *f, char *l)
{
if (s < 67) // http://garethrees.org/2007/11/14/pngcrush/
return;
// Check for PNG file signature using memcmp
// As it may be faster on CPUs with slow unaligned memory access
// Ref: http://www.libpng.org/pub/png/spec/1.2/PNG-Rationale.html#R.PNG-file-signature
if (memcmp(&d[0], "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a", 8) == 0)
{
I_Error("W_Wad: Lump \"%s\" in file \"%s\" is a .PNG - please convert to either Doom or Flat (raw) image format.", l, f);
}
}
#endif
/** Reads bytes from the head of a lump.
* Note: If the lump is compressed, the whole thing has to be read anyway.
*
@ -1218,7 +1235,15 @@ size_t W_ReadLumpHeaderPwad(UINT16 wad, UINT16 lump, void *dest, size_t size, si
switch(wadfiles[wad]->lumpinfo[lump].compression)
{
case CM_NOCOMPRESSION: // If it's uncompressed, we directly write the data into our destination, and return the bytes read.
#ifdef NO_PNG_LUMPS
{
size_t bytesread = fread(dest, 1, size, handle);
ErrorIfPNG(dest, bytesread, wadfiles[wad]->filename, l->name2);
return bytesread;
}
#else
return fread(dest, 1, size, handle);
#endif
case CM_LZF: // Is it LZF compressed? Used by ZWADs.
{
#ifdef ZWAD
@ -1253,11 +1278,15 @@ size_t W_ReadLumpHeaderPwad(UINT16 wad, UINT16 lump, void *dest, size_t size, si
M_Memcpy(dest, decData + offset, size);
Z_Free(rawData);
Z_Free(decData);
#ifdef NO_PNG_LUMPS
ErrorIfPNG(dest, size, wadfiles[wad]->filename, l->name2);
#endif
return size;
#else
//I_Error("ZWAD files not supported on this platform.");
return 0;
#endif
}
#ifdef HAVE_ZLIB
case CM_DEFLATE: // Is it compressed via DEFLATE? Very common in ZIPs/PK3s, also what most doom-related editors support.
@ -1311,6 +1340,9 @@ size_t W_ReadLumpHeaderPwad(UINT16 wad, UINT16 lump, void *dest, size_t size, si
Z_Free(rawData);
Z_Free(decData);
#ifdef NO_PNG_LUMPS
ErrorIfPNG(dest, size, wadfiles[wad]->filename, l->name2);
#endif
return size;
}
#endif