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 typedef struct mwad_s
  27 {
  28         qfile_t *file;
  29         int numlumps;
  30         lumpinfo_t *lumps;
  31 }
  32 mwad_t;
  33
  34 typedef struct wadstate_s
  35 {
  36         unsigned char *gfx_base;
  37         mwad_t gfx;
  38         memexpandablearray_t hlwads;
  39 }
  40 wadstate_t;
  41
  42 static wadstate_t wad;
  43
  44 /*
  45 ==================
  46 W_CleanupName
  47
  48 Lowercases name and pads with spaces and a terminating 0 to the length of
  49 lumpinfo_t->name.
  50 Used so lumpname lookups can proceed rapidly by comparing 4 chars at a time
  51 Space padding is so names can be printed nicely in tables.
  52 Can safely be performed in place.
  53 ==================
  54 */
  55 static void W_CleanupName (const char *in, char *out)
  56 {
  57         int             i;
  58         int             c;
  59
  60         for (i=0 ; i<16 ; i++ )
  61         {
  62                 c = in[i];
  63                 if (!c)
  64                         break;
  65
  66                 if (c >= 'A' && c <= 'Z')
  67                         c += ('a' - 'A');
  68                 out[i] = c;
  69         }
  70
  71         for ( ; i< 16 ; i++ )
  72                 out[i] = 0;
  73 }
  74
  75 static void W_SwapLumps(int numlumps, lumpinfo_t *lumps)
  76 {
  77         int i;
  78         for (i = 0;i < numlumps;i++)
  79         {
  80                 lumps[i].filepos = LittleLong(lumps[i].filepos);
  81                 lumps[i].disksize = LittleLong(lumps[i].disksize);
  82                 lumps[i].size = LittleLong(lumps[i].size);
  83                 W_CleanupName(lumps[i].name, lumps[i].name);
  84         }
  85 }
  86
  87 void W_UnloadAll(void)
  88 {
  89         unsigned int i;
  90         mwad_t *w;
  91         // free gfx.wad if it is loaded
  92         if (wad.gfx_base)
  93                 Mem_Free(wad.gfx_base);
  94         wad.gfx_base = NULL;
  95         // close all hlwad files and free their lumps data
  96         for (i = 0;i < Mem_ExpandableArray_IndexRange(&wad.hlwads);i++)
  97         {
  98                 w = (mwad_t *) Mem_ExpandableArray_RecordAtIndex(&wad.hlwads, i);
  99                 if (!w)
 100                         continue;
 101                 if (w->file)
 102                         FS_Close(w->file);
 103                 w->file = NULL;
 104                 if (w->lumps)
 105                         Mem_Free(w->lumps);
 106                 w->lumps = NULL;
 107         }
 108         // free the hlwads array
 109         Mem_ExpandableArray_FreeArray(&wad.hlwads);
 110         // clear all state
 111         memset(&wad, 0, sizeof(wad));
 112 }
 113
 114 unsigned char *W_GetLumpName(const char *name)
 115 {
 116         int i;
 117         fs_offset_t filesize;
 118         lumpinfo_t *lump;
 119         char clean[16];
 120         wadinfo_t *header;
 121         int infotableofs;
 122
 123         W_CleanupName (name, clean);
 124
 125         if (!wad.gfx_base)
 126         {
 127                 if ((wad.gfx_base = FS_LoadFile ("gfx.wad", cls.permanentmempool, false, &filesize)))
 128                 {
 129                         if (memcmp(wad.gfx_base, "WAD2", 4))
 130                         {
 131                                 Con_Print("gfx.wad doesn't have WAD2 id\n");
 132                                 Mem_Free(wad.gfx_base);
 133                                 wad.gfx_base = NULL;
 134                         }
 135                         else
 136                         {
 137                                 header = (wadinfo_t *)wad.gfx_base;
 138                                 wad.gfx.numlumps = LittleLong(header->numlumps);
 139                                 infotableofs = LittleLong(header->infotableofs);
 140                                 wad.gfx.lumps = (lumpinfo_t *)(wad.gfx_base + infotableofs);
 141
 142                                 // byteswap the gfx.wad lumps in place
 143                                 W_SwapLumps(wad.gfx.numlumps, wad.gfx.lumps);
 144                         }
 145                 }
 146         }
 147
 148         for (lump = wad.gfx.lumps, i = 0;i < wad.gfx.numlumps;i++, lump++)
 149                 if (!strcmp(clean, lump->name))
 150                         return (wad.gfx_base + lump->filepos);
 151         return NULL;
 152 }
 153
 154 /*
 155 ====================
 156 W_LoadTextureWadFile
 157 ====================
 158 */
 159 void W_LoadTextureWadFile (char *filename, int complain)
 160 {
 161         wadinfo_t               header;
 162         int                             infotableofs;
 163         qfile_t                 *file;
 164         int                             numlumps;
 165         mwad_t                  *w;
 166
 167         file = FS_OpenVirtualFile(filename, false);
 168         if (!file)
 169         {
 170                 if (complain)
 171                         Con_Printf("W_LoadTextureWadFile: couldn't find %s\n", filename);
 172                 return;
 173         }
 174
 175         if (FS_Read(file, &header, sizeof(wadinfo_t)) != sizeof(wadinfo_t))
 176         {Con_Print("W_LoadTextureWadFile: unable to read wad header\n");FS_Close(file);file = NULL;return;}
 177
 178         if(memcmp(header.identification, "WAD3", 4))
 179         {Con_Printf("W_LoadTextureWadFile: Wad file %s doesn't have WAD3 id\n",filename);FS_Close(file);file = NULL;return;}
 180
 181         numlumps = LittleLong(header.numlumps);
 182         if (numlumps < 1 || numlumps > 65536)
 183         {Con_Printf("W_LoadTextureWadFile: invalid number of lumps (%i)\n", numlumps);FS_Close(file);file = NULL;return;}
 184         infotableofs = LittleLong(header.infotableofs);
 185         if (FS_Seek (file, infotableofs, SEEK_SET))
 186         {Con_Print("W_LoadTextureWadFile: unable to seek to lump table\n");FS_Close(file);file = NULL;return;}
 187
 188         if (!wad.hlwads.mempool)
 189                 Mem_ExpandableArray_NewArray(&wad.hlwads, cls.permanentmempool, sizeof(mwad_t), 16);
 190         w = (mwad_t *) Mem_ExpandableArray_AllocRecord(&wad.hlwads);
 191         w->file = file;
 192         w->numlumps = numlumps;
 193         w->lumps = (lumpinfo_t *) Mem_Alloc(cls.permanentmempool, w->numlumps * sizeof(lumpinfo_t));
 194
 195         if (!w->lumps)
 196         {
 197                 Con_Print("W_LoadTextureWadFile: unable to allocate temporary memory for lump table\n");
 198                 FS_Close(w->file);
 199                 w->file = NULL;
 200                 w->numlumps = 0;
 201                 return;
 202         }
 203
 204         if (FS_Read(file, w->lumps, sizeof(lumpinfo_t) * w->numlumps) != (fs_offset_t)sizeof(lumpinfo_t) * numlumps)
 205         {
 206                 Con_Print("W_LoadTextureWadFile: unable to read lump table\n");
 207                 FS_Close(w->file);
 208                 w->file = NULL;
 209                 w->numlumps = 0;
 210                 Mem_Free(w->lumps);
 211                 w->lumps = NULL;
 212                 return;
 213         }
 214
 215         W_SwapLumps(w->numlumps, w->lumps);
 216
 217         // leaves the file open
 218 }
 219
 220 unsigned char *W_ConvertWAD3TextureBGRA(miptex_t *tex)
 221 {
 222         unsigned char *in, *data, *out, *pal;
 223         int d, p;
 224
 225         in = (unsigned char *)tex + tex->offsets[0];
 226         data = out = (unsigned char *)Mem_Alloc(tempmempool, tex->width * tex->height * 4);
 227         if (!data)
 228                 return NULL;
 229         image_width = tex->width;
 230         image_height = tex->height;
 231         pal = in + (((image_width * image_height) * 85) >> 6);
 232         pal += 2;
 233         for (d = 0;d < image_width * image_height;d++)
 234         {
 235                 p = *in++;
 236                 if (tex->name[0] == '{' && p == 255)
 237                         out[0] = out[1] = out[2] = out[3] = 0;
 238                 else
 239                 {
 240                         p *= 3;
 241                         out[2] = pal[p];
 242                         out[1] = pal[p+1];
 243                         out[0] = pal[p+2];
 244                         out[3] = 255;
 245                 }
 246                 out += 4;
 247         }
 248         return data;
 249 }
 250
 251 unsigned char *W_GetTextureBGRA(char *name)
 252 {
 253         unsigned int i, j, k;
 254         miptex_t *tex;
 255         unsigned char *data;
 256         mwad_t *w;
 257         char texname[17];
 258         size_t range;
 259
 260         texname[16] = 0;
 261         W_CleanupName(name, texname);
 262         if (!wad.hlwads.mempool)
 263                 Mem_ExpandableArray_NewArray(&wad.hlwads, cls.permanentmempool, sizeof(mwad_t), 16);
 264         range = Mem_ExpandableArray_IndexRange(&wad.hlwads);
 265         for (k = 0;k < range;k++)
 266         {
 267                 w = (mwad_t *)Mem_ExpandableArray_RecordAtIndex(&wad.hlwads, k);
 268                 if (!w)
 269                         continue;
 270                 for (i = 0;i < (unsigned int)w->numlumps;i++)
 271                 {
 272                         if (!strcmp(texname, w->lumps[i].name)) // found it
 273                         {
 274                                 if (FS_Seek(w->file, w->lumps[i].filepos, SEEK_SET))
 275                                 {Con_Print("W_GetTexture: corrupt WAD3 file\n");return NULL;}
 276
 277                                 tex = (miptex_t *)Mem_Alloc(tempmempool, w->lumps[i].disksize);
 278                                 if (!tex)
 279                                         return NULL;
 280                                 if (FS_Read(w->file, tex, w->lumps[i].size) < w->lumps[i].disksize)
 281                                 {Con_Print("W_GetTexture: corrupt WAD3 file\n");return NULL;}
 282
 283                                 tex->width = LittleLong(tex->width);
 284                                 tex->height = LittleLong(tex->height);
 285                                 for (j = 0;j < MIPLEVELS;j++)
 286                                         tex->offsets[j] = LittleLong(tex->offsets[j]);
 287                                 data = W_ConvertWAD3TextureBGRA(tex);
 288                                 Mem_Free(tex);
 289                                 return data;
 290                         }
 291                 }
 292         }
 293         image_width = image_height = 0;
 294         return NULL;
 295 }
 296