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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
2008 Ludwig Nussel
This file is part of Quake III Arena source code.
Quake III Arena source code is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
Quake III Arena source code is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "tr_local.h"
/*
========================================================================
PCX files are used for 8 bit images
========================================================================
*/
typedef struct {
char manufacturer;
char version;
char encoding;
char bits_per_pixel;
unsigned short xmin,ymin,xmax,ymax;
unsigned short hres,vres;
unsigned char palette[48];
char reserved;
char color_planes;
unsigned short bytes_per_line;
unsigned short palette_type;
unsigned short hscreensize, vscreensize;
char filler[54];
unsigned char data[];
} pcx_t;
void R_LoadPCX ( const char *filename, byte **pic, int *width, int *height)
{
union {
byte *b;
void *v;
} raw;
byte *end;
pcx_t *pcx;
int len;
unsigned char dataByte = 0, runLength = 0;
byte *out, *pix;
unsigned short w, h;
byte *pic8;
byte *palette;
int i;
unsigned size = 0;
if (width)
*width = 0;
if (height)
*height = 0;
*pic = NULL;
//
// load the file
//
len = ri.FS_ReadFile( ( char * ) filename, &raw.v);
if (!raw.b || len < 0) {
return;
}
if((unsigned)len < sizeof(pcx_t))
{
ri.Printf (PRINT_ALL, "PCX truncated: %s\n", filename);
ri.FS_FreeFile (raw.v);
return;
}
//
// parse the PCX file
//
pcx = (pcx_t *)raw.b;
end = raw.b+len;
w = LittleShort(pcx->xmax)+1;
h = LittleShort(pcx->ymax)+1;
size = w*h;
if (pcx->manufacturer != 0x0a
|| pcx->version != 5
|| pcx->encoding != 1
|| pcx->color_planes != 1
|| pcx->bits_per_pixel != 8
|| w >= 1024
|| h >= 1024)
{
ri.Printf (PRINT_ALL, "Bad or unsupported pcx file %s (%dx%d@%d)\n", filename, w, h, pcx->bits_per_pixel);
return;
}
pix = pic8 = ri.Z_Malloc ( size );
raw.b = pcx->data;
// FIXME: should use bytes_per_line but original q3 didn't do that either
while(pix < pic8+size)
{
if(runLength > 0) {
*pix++ = dataByte;
--runLength;
continue;
}
if(raw.b+1 > end)
break;
dataByte = *raw.b++;
if((dataByte & 0xC0) == 0xC0)
{
if(raw.b+1 > end)
break;
runLength = dataByte & 0x3F;
dataByte = *raw.b++;
}
else
runLength = 1;
}
if(pix < pic8+size)
{
ri.Printf (PRINT_ALL, "PCX file truncated: %s\n", filename);
ri.FS_FreeFile (pcx);
ri.Free (pic8);
}
if (raw.b-(byte*)pcx >= end - (byte*)769 || end[-769] != 0x0c)
{
ri.Printf (PRINT_ALL, "PCX missing palette: %s\n", filename);
ri.FS_FreeFile (pcx);
ri.Free (pic8);
return;
}
palette = end-768;
pix = out = ri.Z_Malloc(4 * size );
for (i = 0 ; i < size ; i++)
{
unsigned char p = pic8[i];
pix[0] = palette[p*3];
pix[1] = palette[p*3 + 1];
pix[2] = palette[p*3 + 2];
pix[3] = 255;
pix += 4;
}
if (width)
*width = w;
if (height)
*height = h;
*pic = out;
ri.FS_FreeFile (pcx);
ri.Free (pic8);
}
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