diff options
Diffstat (limited to 'src/renderergl2/tr_image_pcx.c')
| -rw-r--r-- | src/renderergl2/tr_image_pcx.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/src/renderergl2/tr_image_pcx.c b/src/renderergl2/tr_image_pcx.c new file mode 100644 index 00000000..5e1de51b --- /dev/null +++ b/src/renderergl2/tr_image_pcx.c @@ -0,0 +1,179 @@ +/* +=========================================================================== +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 "../qcommon/q_shared.h" +#include "../qcommon/qfiles.h" +#include "../qcommon/qcommon.h" +#include "../renderercommon/tr_public.h" +extern refimport_t ri; + +/* +======================================================================== + +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.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.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); +} |