132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/*
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pcx.c
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PCX loading/saving functions
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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Portions Copyright (C) 1999,2000 Nelson Rush.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#include <stdlib.h>
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#include <qtypes.h>
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#include <quakeio.h>
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#include <console.h>
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#include <image.h>
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#include <zone.h>
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#include <quakefs.h>
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#include <sys.h>
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/*
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LoadPCX
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*/
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byte *LoadPCX (char *file, cache_user_t *cache, int buf_x, int buf_y) {
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pcx_t *pcx;
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byte *pix;
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byte *raw, *out;
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int x, y;
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int dataByte, runLength;
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/*
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Parse PCX file
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*/
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out = Cache_Check (cache);
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if (out)
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{
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Con_Printf("Using cached version of %s\n", file);
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return out;
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}
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raw = COM_LoadTempFile (file);
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if (!raw) {
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Con_Printf("Can not open %s\n", file);
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return NULL;
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}
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pcx = (pcx_t *)raw;
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raw = &pcx->data;
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if (pcx->manufacturer != 0x0a
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|| pcx->version != 5
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|| pcx->encoding != 1
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|| pcx->bits_per_pixel != 8
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|| pcx->xmax >= 320
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|| pcx->ymax >= 200)
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{
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Con_Printf ("Bad PCX file\n");
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return NULL;
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}
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if (!buf_x)
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buf_x = pcx->ymax;
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if (!buf_y)
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buf_y = pcx->ymax;
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Con_Printf("PCX file %s %dx%d\n", file, buf_x, buf_y);
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out = Cache_Alloc (cache, buf_x * buf_y, file);
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if (!out)
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Sys_Error("LoadPCX: couldn't allocate.");
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pix = out;
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memset(out, 0, buf_x * buf_y);
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for (y=0 ; y<=pcx->ymax ; y++, pix += buf_x) {
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for (x=0 ; x<=pcx->xmax ; ) {
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if (raw - (byte*)pcx > com_filesize) {
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Cache_Free(cache);
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Con_Printf("PCX file %s was malformed. You should delete it.\n", file);
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return NULL;
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}
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dataByte = *raw++;
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if ((dataByte & 0xC0) == 0xC0) {
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runLength = dataByte & 0x3F;
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if (raw - (byte*)pcx > com_filesize) {
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Cache_Free(cache);
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Con_Printf("PCX file %s was malformed. You should delete it.\n", file);
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return NULL;
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}
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dataByte = *raw++;
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} else
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runLength = 1;
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if (runLength + x > pcx->xmax + 2) {
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Cache_Free(cache);
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Con_Printf("PCX file %s was malformed. You should delete it.\n", file);
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return NULL;
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}
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while(runLength-- > 0)
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pix[x++] = dataByte;
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}
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}
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if (raw - (byte*)pcx > com_filesize) {
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Cache_Free(cache);
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Con_Printf("PCX file %s was malformed. You should delete it.\n", file);
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return NULL;
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}
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return out;
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}
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