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