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