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 void SwapPic (qpic_t *pic);
  28
  29
  30 /*
  31 ==================
  32 W_CleanupName
  33
  34 Lowercases name and pads with spaces and a terminating 0 to the length of
  35 lumpinfo_t->name.
  36 Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
  37 Space padding is so names can be printed nicely in tables.
  38 Can safely be performed in place.
  39 ==================
  40 */
  41 static void W_CleanupName (char *in, char *out)
  42 {
  43         int             i;
  44         int             c;
  45
  46         for (i=0 ; i<16 ; i++ )
  47         {
  48                 c = in[i];
  49                 if (!c)
  50                         break;
  51
  52                 if (c >= 'A' && c <= 'Z')
  53                         c += ('a' - 'A');
  54                 out[i] = c;
  55         }
  56
  57         for ( ; i< 16 ; i++ )
  58                 out[i] = 0;
  59 }
  60
  61 void *W_GetLumpName(char *name)
  62 {
  63         int i;
  64         lumpinfo_t *lump;
  65         char clean[16];
  66         wadinfo_t *header;
  67         int infotableofs;
  68         void *temp;
  69         static int wad_loaded = false;
  70         static int wad_numlumps = 0;
  71         static lumpinfo_t *wad_lumps = NULL;
  72         static qbyte *wad_base = NULL;
  73         static mempool_t *wad_mempool = NULL;
  74
  75         W_CleanupName (name, clean);
  76
  77         if (!wad_loaded)
  78         {
  79                 wad_loaded = true;
  80                 if ((temp = FS_LoadFile ("gfx.wad", tempmempool, false)))
  81                 {
  82                         if (memcmp(temp, "WAD2", 4))
  83                                 Con_Print("gfx.wad doesn't have WAD2 id\n");
  84                         else
  85                         {
  86                                 wad_mempool = Mem_AllocPool("gfx.wad", 0, NULL);
  87                                 wad_base = Mem_Alloc(wad_mempool, fs_filesize);
  88
  89                                 memcpy(wad_base, temp, fs_filesize);
  90                                 Mem_Free(temp);
  91
  92                                 header = (wadinfo_t *)wad_base;
  93                                 wad_numlumps = LittleLong(header->numlumps);
  94                                 infotableofs = LittleLong(header->infotableofs);
  95                                 wad_lumps = (lumpinfo_t *)(wad_base + infotableofs);
  96
  97                                 for (i=0, lump = wad_lumps ; i<wad_numlumps ; i++,lump++)
  98                                 {
  99                                         lump->filepos = LittleLong(lump->filepos);
 100                                         lump->size = LittleLong(lump->size);
 101                                         W_CleanupName (lump->name, lump->name);
 102                                         if (lump->type == TYP_QPIC)
 103                                                 SwapPic ( (qpic_t *)(wad_base + lump->filepos));
 104                                 }
 105                         }
 106                 }
 107         }
 108
 109         for (lump = wad_lumps, i = 0;i < wad_numlumps;i++, lump++)
 110                 if (!strcmp(clean, lump->name))
 111                         return (void *)(wad_base + lump->filepos);
 112
 113         if (wad_base)
 114                 Con_DPrintf("W_GetLumpByName(\"%s\"): couldn't find file in gfx.wad\n", name);
 115         else
 116                 Con_DPrintf("W_GetLumpByName(\"%s\"): couldn't load gfx.wad\n", name);
 117         return NULL;
 118 }
 119
 120 /*
 121 =============================================================================
 122
 123 automatic byte swapping
 124
 125 =============================================================================
 126 */
 127
 128 void SwapPic (qpic_t *pic)
 129 {
 130         pic->width = LittleLong(pic->width);
 131         pic->height = LittleLong(pic->height);
 132 }
 133
 134 // LordHavoc: added alternate WAD2/WAD3 system for HalfLife texture wads
 135 #define TEXWAD_MAXIMAGES 16384
 136 typedef struct
 137 {
 138         char name[16];
 139         qfile_t *file;
 140         int position;
 141         int size;
 142 } texwadlump_t;
 143
 144 static texwadlump_t texwadlump[TEXWAD_MAXIMAGES];
 145
 146 /*
 147 ====================
 148 W_LoadTextureWadFile
 149 ====================
 150 */
 151 void W_LoadTextureWadFile (char *filename, int complain)
 152 {
 153         lumpinfo_t              *lumps, *lump_p;
 154         wadinfo_t               header;
 155         int                             i, j;
 156         int                             infotableofs;
 157         qfile_t                 *file;
 158         int                             numlumps;
 159
 160         file = FS_Open (filename, "rb", false);
 161         if (!file)
 162         {
 163                 if (complain)
 164                         Con_Printf("W_LoadTextureWadFile: couldn't find %s\n", filename);
 165                 return;
 166         }
 167
 168         if (FS_Read(file, &header, sizeof(wadinfo_t)) != sizeof(wadinfo_t))
 169         {Con_Print("W_LoadTextureWadFile: unable to read wad header\n");return;}
 170
 171         if(memcmp(header.identification, "WAD3", 4))
 172         {Con_Printf("W_LoadTextureWadFile: Wad file %s doesn't have WAD3 id\n",filename);return;}
 173
 174         numlumps = LittleLong(header.numlumps);
 175         if (numlumps < 1 || numlumps > TEXWAD_MAXIMAGES)
 176         {Con_Printf("W_LoadTextureWadFile: invalid number of lumps (%i)\n", numlumps);return;}
 177         infotableofs = LittleLong(header.infotableofs);
 178         if (FS_Seek (file, infotableofs, SEEK_SET))
 179         {Con_Print("W_LoadTextureWadFile: unable to seek to lump table\n");return;}
 180         if (!(lumps = Mem_Alloc(tempmempool, sizeof(lumpinfo_t)*numlumps)))
 181         {Con_Print("W_LoadTextureWadFile: unable to allocate temporary memory for lump table\n");return;}
 182
 183         if (FS_Read(file, lumps, sizeof(lumpinfo_t) * numlumps) != sizeof(lumpinfo_t) * (size_t)numlumps)
 184         {Con_Print("W_LoadTextureWadFile: unable to read lump table\n");return;}
 185
 186         for (i=0, lump_p = lumps ; i<numlumps ; i++,lump_p++)
 187         {
 188                 W_CleanupName (lump_p->name, lump_p->name);
 189                 for (j = 0;j < TEXWAD_MAXIMAGES;j++)
 190                 {
 191                         if (texwadlump[j].name[0]) // occupied slot, check the name
 192                         {
 193                                 if (!strcmp(lump_p->name, texwadlump[j].name)) // name match, replace old one
 194                                         break;
 195                         }
 196                         else // empty slot
 197                                 break;
 198                 }
 199                 if (j >= TEXWAD_MAXIMAGES)
 200                         break; // abort loading
 201                 W_CleanupName (lump_p->name, texwadlump[j].name);
 202                 texwadlump[j].file = file;
 203                 texwadlump[j].position = LittleLong(lump_p->filepos);
 204                 texwadlump[j].size = LittleLong(lump_p->disksize);
 205         }
 206         Mem_Free(lumps);
 207         // leaves the file open
 208 }
 209
 210
 211 qbyte *W_ConvertWAD3Texture(miptex_t *tex)
 212 {
 213         qbyte *in, *data, *out, *pal;
 214         int d, p;
 215
 216         in = (qbyte *)tex + tex->offsets[0];
 217         data = out = Mem_Alloc(tempmempool, tex->width * tex->height * 4);
 218         if (!data)
 219                 return NULL;
 220         image_width = tex->width;
 221         image_height = tex->height;
 222         pal = in + (((image_width * image_height) * 85) >> 6);
 223         pal += 2;
 224         for (d = 0;d < image_width * image_height;d++)
 225         {
 226                 p = *in++;
 227                 if (tex->name[0] == '{' && p == 255)
 228                         out[0] = out[1] = out[2] = out[3] = 0;
 229                 else
 230                 {
 231                         p *= 3;
 232                         out[0] = pal[p];
 233                         out[1] = pal[p+1];
 234                         out[2] = pal[p+2];
 235                         out[3] = 255;
 236                 }
 237                 out += 4;
 238         }
 239         return data;
 240 }
 241
 242 qbyte *W_GetTexture(char *name)
 243 {
 244         char texname[17];
 245         int i, j;
 246         qfile_t *file;
 247         miptex_t *tex;
 248         qbyte *data;
 249
 250         texname[16] = 0;
 251         W_CleanupName (name, texname);
 252         for (i = 0;i < TEXWAD_MAXIMAGES;i++)
 253         {
 254                 if (texwadlump[i].name[0])
 255                 {
 256                         if (!strcmp(texname, texwadlump[i].name)) // found it
 257                         {
 258                                 file = texwadlump[i].file;
 259                                 if (FS_Seek(file, texwadlump[i].position, SEEK_SET))
 260                                 {Con_Print("W_GetTexture: corrupt WAD3 file\n");return NULL;}
 261
 262                                 tex = Mem_Alloc(tempmempool, texwadlump[i].size);
 263                                 if (!tex)
 264                                         return NULL;
 265                                 if (FS_Read(file, tex, texwadlump[i].size) < (size_t)texwadlump[i].size)
 266                                 {Con_Print("W_GetTexture: corrupt WAD3 file\n");return NULL;}
 267
 268                                 tex->width = LittleLong(tex->width);
 269                                 tex->height = LittleLong(tex->height);
 270                                 for (j = 0;j < MIPLEVELS;j++)
 271                                         tex->offsets[j] = LittleLong(tex->offsets[j]);
 272                                 data = W_ConvertWAD3Texture(tex);
 273                                 Mem_Free(tex);
 274                                 return data;
 275                         }
 276                 }
 277                 else
 278                         break;
 279         }
 280         image_width = image_height = 0;
 281         return NULL;
 282 }
 283