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Updated the pcx loader(s), to ensure that min offsets are handled correctly and consistently.

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git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@2873 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2008-01-23 01:41:25 +00:00
parent 18ee105ed5
commit 433ade6f5c
1 changed files with 34 additions and 20 deletions
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54
engine/client/image.c
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@ -1215,7 +1215,7 @@ qbyte *ReadPCXFile(qbyte *buf, int length, int *width, int *height)
qbyte *pcx_rgb;
unsigned short xmin, ymin, xmax, ymax;
unsigned short xmin, ymin, swidth, sheight;
//
// parse the PCX file
@ -1225,21 +1225,21 @@ qbyte *ReadPCXFile(qbyte *buf, int length, int *width, int *height)
xmin = LittleShort(pcx->xmin);
ymin = LittleShort(pcx->ymin);
xmax = LittleShort(pcx->xmax);
ymax = LittleShort(pcx->ymax);
swidth = LittleShort(pcx->xmax)-xmin+1;
sheight = LittleShort(pcx->ymax)-ymin+1;
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->bits_per_pixel != 8
|| xmax >= 1024
|| ymax >= 1024)
|| swidth >= 1024
|| sheight >= 1024)
{
return NULL;
}
*width = xmax-xmin+1;
*height = ymax-ymin+1;
*width = swidth;
*height = sheight;
if (r_dodgypcxfiles.value)
palette = host_basepal;
@ -1248,13 +1248,13 @@ qbyte *ReadPCXFile(qbyte *buf, int length, int *width, int *height)
data = (char *)(pcx+1);
count = (xmax+1) * (ymax+1);
count = (swidth) * (sheight);
pcx_rgb = BZ_Malloc( count * 4);
for (y=0 ; y<=ymax ; y++)
for (y=0 ; y<swidth ; y++)
{
pix = pcx_rgb + 4*y*(xmax+1);
for (x=0 ; x<=xmax ; )
pix = pcx_rgb + 4*y*(swidth);
for (x=0 ; x<sheight ; )
{
dataByte = *data;
data++;
@ -1262,6 +1262,12 @@ qbyte *ReadPCXFile(qbyte *buf, int length, int *width, int *height)
if((dataByte & 0xC0) == 0xC0)
{
runLength = dataByte & 0x3F;
if (x+runLength>swidth)
{
Con_Printf("corrupt pcx\n");
BZ_Free(pcx_rgb);
return NULL;
}
dataByte = *data;
data++;
}
@ -1296,7 +1302,7 @@ qbyte *ReadPCXData(qbyte *buf, int length, int width, int height, qbyte *result)
int count;
qbyte *data;
unsigned short xmin, ymin, xmax, ymax;
unsigned short xmin, ymin, swidth, sheight;
//
// parse the PCX file
@ -1306,8 +1312,8 @@ qbyte *ReadPCXData(qbyte *buf, int length, int width, int height, qbyte *result)
xmin = LittleShort(pcx->xmin);
ymin = LittleShort(pcx->ymin);
xmax = LittleShort(pcx->xmax);
ymax = LittleShort(pcx->ymax);
swidth = LittleShort(pcx->xmax)-xmin+1;
sheight = LittleShort(pcx->ymax)-ymin+1;
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
@ -1317,21 +1323,24 @@ qbyte *ReadPCXData(qbyte *buf, int length, int width, int height, qbyte *result)
return NULL;
}
if (width != xmax-xmin+1 ||
height > ymax-ymin+1)
return NULL;
if (width != swidth ||
height > sheight)
{
Con_Printf("unsupported pcx size\n");
return NULL; //we can't feed the requester with enough info
}
palette = buf + length-768;
data = (char *)(pcx+1);
count = (xmax+1) * (ymax+1);
count = (swidth) * (sheight);
for (y=0 ; y<height ; y++)
{
pix = result + y*(xmax+1);
for (x=0 ; x<=xmax ; )
pix = result + y*swidth;
for (x=0 ; x<swidth ; )
{
dataByte = *data;
data++;
@ -1339,6 +1348,11 @@ qbyte *ReadPCXData(qbyte *buf, int length, int width, int height, qbyte *result)
if((dataByte & 0xC0) == 0xC0)
{
runLength = dataByte & 0x3F;
if (x+runLength>swidth)
{
Con_Printf("corrupt pcx\n");
return NULL;
}
dataByte = *data;
data++;
}