wad.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20
  21
  22 #include "quakedef.h"
  23 #include "image.h"
  24 #include "wad.h"
  25
  26
  27 /*
  28 ==================
  29 W_CleanupName
  30
  31 Lowercases name and pads with spaces and a terminating 0 to the length of
  32 lumpinfo_t->name.
  33 Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
  34 Space padding is so names can be printed nicely in tables.
  35 Can safely be performed in place.
  36 ==================
  37 */
  38 static void W_CleanupName (const char *in, char *out)
  39 {
  40         int             i;
  41         int             c;
  42
  43         for (i=0 ; i<16 ; i++ )
  44         {
  45                 c = in[i];
  46                 if (!c)
  47                         break;
  48
  49                 if (c >= 'A' && c <= 'Z')
  50                         c += ('a' - 'A');
  51                 out[i] = c;
  52         }
  53
  54         for ( ; i< 16 ; i++ )
  55                 out[i] = 0;
  56 }
  57
  58 unsigned char *W_GetLumpName(const char *name)
  59 {
  60         int i;
  61         fs_offset_t filesize;
  62         lumpinfo_t *lump;
  63         char clean[16];
  64         wadinfo_t *header;
  65         int infotableofs;
  66         static int wad_loaded = false;
  67         static int wad_numlumps = 0;
  68         static lumpinfo_t *wad_lumps = NULL;
  69         static unsigned char *wad_base = NULL;
  70
  71         W_CleanupName (name, clean);
  72
  73         if (!wad_loaded)
  74         {
  75                 wad_loaded = true;
  76                 if ((wad_base = FS_LoadFile ("gfx.wad", cls.permanentmempool, false, &filesize)))
  77                 {
  78                         if (memcmp(wad_base, "WAD2", 4))
  79                         {
  80                                 Con_Print("gfx.wad doesn't have WAD2 id\n");
  81                                 Mem_Free(wad_base);
  82                                 wad_base = NULL;
  83                         }
  84                         else
  85                         {
  86                                 header = (wadinfo_t *)wad_base;
  87                                 wad_numlumps = LittleLong(header->numlumps);
  88                                 infotableofs = LittleLong(header->infotableofs);
  89                                 wad_lumps = (lumpinfo_t *)(wad_base + infotableofs);
  90
  91                                 for (i=0, lump = wad_lumps ; i<wad_numlumps ; i++,lump++)
  92                                 {
  93                                         lump->filepos = LittleLong(lump->filepos);
  94                                         lump->size = LittleLong(lump->size);
  95                                         W_CleanupName (lump->name, lump->name);
  96                                 }
  97                         }
  98                 }
  99         }
 100
 101         for (lump = wad_lumps, i = 0;i < wad_numlumps;i++, lump++)
 102                 if (!strcmp(clean, lump->name))
 103                         return (wad_base + lump->filepos);
 104
 105         if (wad_base)
 106                 Con_DPrintf("W_GetLumpByName(\"%s\"): couldn't find file in gfx.wad\n", name);
 107         else
 108                 Con_DPrintf("W_GetLumpByName(\"%s\"): couldn't load gfx.wad\n", name);
 109         return NULL;
 110 }
 111
 112 /*
 113 =============================================================================
 114
 115 automatic byte swapping
 116
 117 =============================================================================
 118 */
 119
 120 // LordHavoc: added alternate WAD2/WAD3 system for HalfLife texture wads
 121 #define TEXWAD_MAXIMAGES 16384
 122 typedef struct texwadlump_s
 123 {
 124         char name[16];
 125         qfile_t *file;
 126         int position;
 127         int size;
 128 } texwadlump_t;
 129
 130 static texwadlump_t texwadlump[TEXWAD_MAXIMAGES];
 131
 132 /*
 133 ====================
 134 W_LoadTextureWadFile
 135 ====================
 136 */
 137 void W_LoadTextureWadFile (char *filename, int complain)
 138 {
 139         lumpinfo_t              *lumps, *lump_p;
 140         wadinfo_t               header;
 141         int                             i, j;
 142         int                             infotableofs;
 143         qfile_t                 *file;
 144         int                             numlumps;
 145
 146         file = FS_Open (filename, "rb", false, false);
 147         if (!file)
 148         {
 149                 if (complain)
 150                         Con_Printf("W_LoadTextureWadFile: couldn't find %s\n", filename);
 151                 return;
 152         }
 153
 154         if (FS_Read(file, &header, sizeof(wadinfo_t)) != sizeof(wadinfo_t))
 155         {Con_Print("W_LoadTextureWadFile: unable to read wad header\n");return;}
 156
 157         if(memcmp(header.identification, "WAD3", 4))
 158         {Con_Printf("W_LoadTextureWadFile: Wad file %s doesn't have WAD3 id\n",filename);return;}
 159
 160         numlumps = LittleLong(header.numlumps);
 161         if (numlumps < 1 || numlumps > TEXWAD_MAXIMAGES)
 162         {Con_Printf("W_LoadTextureWadFile: invalid number of lumps (%i)\n", numlumps);return;}
 163         infotableofs = LittleLong(header.infotableofs);
 164         if (FS_Seek (file, infotableofs, SEEK_SET))
 165         {Con_Print("W_LoadTextureWadFile: unable to seek to lump table\n");return;}
 166         if (!(lumps = (lumpinfo_t *)Mem_Alloc(tempmempool, sizeof(lumpinfo_t)*numlumps)))
 167         {Con_Print("W_LoadTextureWadFile: unable to allocate temporary memory for lump table\n");return;}
 168
 169         if (FS_Read(file, lumps, sizeof(lumpinfo_t) * numlumps) != (fs_offset_t)sizeof(lumpinfo_t) * numlumps)
 170         {Con_Print("W_LoadTextureWadFile: unable to read lump table\n");return;}
 171
 172         for (i=0, lump_p = lumps ; i<numlumps ; i++,lump_p++)
 173         {
 174                 W_CleanupName (lump_p->name, lump_p->name);
 175                 for (j = 0;j < TEXWAD_MAXIMAGES;j++)
 176                 {
 177                         if (texwadlump[j].name[0]) // occupied slot, check the name
 178                         {
 179                                 if (!strcmp(lump_p->name, texwadlump[j].name)) // name match, replace old one
 180                                         break;
 181                         }
 182                         else // empty slot
 183                                 break;
 184                 }
 185                 if (j >= TEXWAD_MAXIMAGES)
 186                         break; // abort loading
 187                 W_CleanupName (lump_p->name, texwadlump[j].name);
 188                 texwadlump[j].file = file;
 189                 texwadlump[j].position = LittleLong(lump_p->filepos);
 190                 texwadlump[j].size = LittleLong(lump_p->disksize);
 191         }
 192         Mem_Free(lumps);
 193         // leaves the file open
 194 }
 195
 196
 197 unsigned char *W_ConvertWAD3Texture(miptex_t *tex)
 198 {
 199         unsigned char *in, *data, *out, *pal;
 200         int d, p;
 201
 202         in = (unsigned char *)tex + tex->offsets[0];
 203         data = out = (unsigned char *)Mem_Alloc(tempmempool, tex->width * tex->height * 4);
 204         if (!data)
 205                 return NULL;
 206         image_width = tex->width;
 207         image_height = tex->height;
 208         pal = in + (((image_width * image_height) * 85) >> 6);
 209         pal += 2;
 210         for (d = 0;d < image_width * image_height;d++)
 211         {
 212                 p = *in++;
 213                 if (tex->name[0] == '{' && p == 255)
 214                         out[0] = out[1] = out[2] = out[3] = 0;
 215                 else
 216                 {
 217                         p *= 3;
 218                         out[0] = pal[p];
 219                         out[1] = pal[p+1];
 220                         out[2] = pal[p+2];
 221                         out[3] = 255;
 222                 }
 223                 out += 4;
 224         }
 225         return data;
 226 }
 227
 228 unsigned char *W_GetTexture(char *name)
 229 {
 230         char texname[17];
 231         int i, j;
 232         qfile_t *file;
 233         miptex_t *tex;
 234         unsigned char *data;
 235
 236         texname[16] = 0;
 237         W_CleanupName (name, texname);
 238         for (i = 0;i < TEXWAD_MAXIMAGES;i++)
 239         {
 240                 if (texwadlump[i].name[0])
 241                 {
 242                         if (!strcmp(texname, texwadlump[i].name)) // found it
 243                         {
 244                                 file = texwadlump[i].file;
 245                                 if (FS_Seek(file, texwadlump[i].position, SEEK_SET))
 246                                 {Con_Print("W_GetTexture: corrupt WAD3 file\n");return NULL;}
 247
 248                                 tex = (miptex_t *)Mem_Alloc(tempmempool, texwadlump[i].size);
 249                                 if (!tex)
 250                                         return NULL;
 251                                 if (FS_Read(file, tex, texwadlump[i].size) < texwadlump[i].size)
 252                                 {Con_Print("W_GetTexture: corrupt WAD3 file\n");return NULL;}
 253
 254                                 tex->width = LittleLong(tex->width);
 255                                 tex->height = LittleLong(tex->height);
 256                                 for (j = 0;j < MIPLEVELS;j++)
 257                                         tex->offsets[j] = LittleLong(tex->offsets[j]);
 258                                 data = W_ConvertWAD3Texture(tex);
 259                                 Mem_Free(tex);
 260                                 return data;
 261                         }
 262                 }
 263                 else
 264                         break;
 265         }
 266         image_width = image_height = 0;
 267         return NULL;
 268 }
 269