src/lib/16_ca.c

   1 /* Catacomb Apocalypse Source Code\r
   2  * Copyright (C) 1993-2014 Flat Rock Software\r
   3  *\r
   4  * This program is free software; you can redistribute it and/or modify\r
   5  * it under the terms of the GNU General Public License as published by\r
   6  * the Free Software Foundation; either version 2 of the License, or\r
   7  * (at your option) any later version.\r
   8  *\r
   9  * This program is distributed in the hope that it will be useful,\r
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  12  * GNU General Public License for more details.\r
  13  *\r
  14  * You should have received a copy of the GNU General Public License along\r
  15  * with this program; if not, write to the Free Software Foundation, Inc.,\r
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\r
  17  */\r
  18 \r
  19 // ID_CA.C\r
  20 \r
  21 /*\r
  22 =============================================================================\r
  23 \r
  24 Id Software Caching Manager\r
  25 ---------------------------\r
  26 \r
  27 Must be started BEFORE the memory manager, because it needs to get the headers\r
  28 loaded into the data segment\r
  29 \r
  30 =============================================================================\r
  31 */\r
  32 \r
  33 #include "src/lib/16_ca.h"\r
  34 #pragma hdrstop\r
  35 \r
  36 #pragma warn -pro\r
  37 #pragma warn -use\r
  38 \r
  39 #define THREEBYTEGRSTARTS\r
  40 //https://github.com/open-watcom/open-watcom-v2/issues/279#issuecomment-244587566 for _seg\r
  41 //http://www.shikadi.net/moddingwiki/GameMaps_Format for info on the code\r
  42 /*\r
  43 =============================================================================\r
  44 \r
  45                                                  LOCAL CONSTANTS\r
  46 \r
  47 =============================================================================\r
  48 */\r
  49 \r
  50 /*typedef struct\r
  51 {\r
  52   word bit0,bit1;       // 0-255 is a character, > is a pointer to a node\r
  53 } huffnode;*/\r
  54 \r
  55 \r
  56 /*typedef struct\r
  57 {\r
  58         unsigned        RLEWtag;\r
  59         long            headeroffsets[100];\r
  60         byte            tileinfo[];\r
  61 } mapfiletype;*/\r
  62 \r
  63 \r
  64 /*\r
  65 =============================================================================\r
  66 \r
  67                                                  GLOBAL VARIABLES\r
  68 \r
  69 =============================================================================\r
  70 */\r
  71 \r
  72 /*byte          _seg    *tinf;\r
  73 int                     mapon;\r
  74 \r
  75 unsigned        _seg    *mapsegs[3];\r
  76 maptype         _seg    *mapheaderseg[NUMMAPS];\r
  77 byte            _seg    *audiosegs[NUMSNDCHUNKS];\r
  78 void            _seg    *grsegs[NUMCHUNKS];\r
  79 \r
  80 byte            far     grneeded[NUMCHUNKS];*/\r
  81 \r
  82 void    (*drawcachebox)         (char *title, unsigned numcache);\r
  83 void    (*updatecachebox)       (void);\r
  84 void    (*finishcachebox)       (void);\r
  85 \r
  86 /*\r
  87 =============================================================================\r
  88 \r
  89                                                  LOCAL VARIABLES\r
  90 \r
  91 =============================================================================\r
  92 */\r
  93 \r
  94 /*extern        long    far     CGAhead;\r
  95 extern  long    far     EGAhead;\r
  96 extern  byte    CGAdict;\r
  97 extern  byte    EGAdict;\r
  98 extern  byte    far     maphead;\r
  99 extern  byte    mapdict;\r
 100 extern  byte    far     audiohead;\r
 101 extern  byte    audiodict;*/\r
 102 \r
 103 void CA_CannotOpen(char *string, global_game_variables_t *gvar);\r
 104 \r
 105 /*long          _seg *grstarts; // array of offsets in egagraph, -1 for sparse\r
 106 long            _seg *audiostarts;      // array of offsets in audio / audiot\r
 107 \r
 108 #ifdef GRHEADERLINKED\r
 109 huffnode        *gvar->ca.grhuffman;\r
 110 #else\r
 111 huffnode        gvar->ca.grhuffman[255];\r
 112 #endif\r
 113 \r
 114 #ifdef AUDIOHEADERLINKED\r
 115 huffnode        *audiohuffman;\r
 116 #else\r
 117 huffnode        audiohuffman[255];\r
 118 #endif\r
 119 \r
 120 \r
 121 int                     grhandle;               // handle to EGAGRAPH\r
 122 int                     maphandle;              // handle to MAPTEMP / GAMEMAPS\r
 123 int                     audiohandle;    // handle to AUDIOT / AUDIO\r
 124 */\r
 125 long            chunkcomplen,chunkexplen;\r
 126 /*\r
 127 SDMode          oldsoundmode;\r
 128 \r
 129 \r
 130 \r
 131 void    CAL_DialogDraw (char *title,unsigned numcache);\r
 132 void    CAL_DialogUpdate (void);\r
 133 void    CAL_DialogFinish (void);*/\r
 134 void    CAL_CarmackExpand (unsigned far *source, unsigned far *dest,\r
 135                 unsigned length);\r
 136 \r
 137 \r
 138 #ifdef THREEBYTEGRSTARTS\r
 139 #define FILEPOSSIZE     3\r
 140 //#define       GRFILEPOS(c) (*(long far *)(((byte far *)grstarts)+(c)*3)&0xffffff)\r
 141 CASVT GRFILEPOS(int c, global_game_variables_t *gvar)\r
 142 {\r
 143         CASVT value;\r
 144         int     offset;\r
 145 \r
 146         offset = c*3;\r
 147 \r
 148         value = *(CASVT far *)(((byte far *)gvar->ca.grstarts)+offset);\r
 149 \r
 150         value &= 0x00ffffffl;\r
 151 \r
 152         if (value == 0xffffffl)\r
 153                 value = -1;\r
 154 \r
 155         return value;\r
 156 };\r
 157 #else\r
 158 #define FILEPOSSIZE     4\r
 159 //#define       GRFILEPOS(c) (gvar->ca.grstarts[c])\r
 160 CASVT GRFILEPOS(int c, global_game_variables_t *gvar)\r
 161 {\r
 162         return gvar->ca.grstarts[c];\r
 163 }\r
 164 #endif\r
 165 \r
 166 #define EXTENSION       "hb1"\r
 167 \r
 168 /*\r
 169 =============================================================================\r
 170 \r
 171                                            LOW LEVEL ROUTINES\r
 172 \r
 173 =============================================================================\r
 174 */\r
 175 \r
 176 /*\r
 177 ============================\r
 178 =\r
 179 = CA_OpenDebug / CA_CloseDebug\r
 180 =\r
 181 = Opens a binary file with the handle "debughandle"\r
 182 =\r
 183 ============================\r
 184 */\r
 185 void CA_OpenDebug(global_game_variables_t *gvar)\r
 186 {\r
 187 #ifdef __BORLANDC__\r
 188         unlink("debug.16b");\r
 189         gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);\r
 190 #endif\r
 191 #ifdef __WATCOMC__\r
 192         unlink("debug.16w");\r
 193         gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);\r
 194 #endif\r
 195 }\r
 196 \r
 197 void CA_CloseDebug(global_game_variables_t *gvar)\r
 198 {\r
 199         close(gvar->handle.debughandle);\r
 200 }\r
 201 \r
 202 \r
 203 \r
 204 /*\r
 205 ============================\r
 206 =\r
 207 = CAL_GetGrChunkLength\r
 208 =\r
 209 = Gets the length of an explicit length chunk (not tiles)\r
 210 = The file pointer is positioned so the compressed data can be read in next.\r
 211 =\r
 212 ============================\r
 213 */\r
 214 \r
 215 void CAL_GetGrChunkLength (int chunk,global_game_variables_t *gvar)\r
 216 {\r
 217         lseek(gvar->ca.file.grhandle,GRFILEPOS(chunk,gvar),SEEK_SET);\r
 218         read(gvar->ca.file.grhandle,&gvar->ca.chunkexplen,sizeof(gvar->ca.chunkexplen));\r
 219         gvar->ca.chunkcomplen = GRFILEPOS(chunk+1,gvar)-GRFILEPOS(chunk,gvar)-4;\r
 220 }\r
 221 \r
 222 \r
 223 /*\r
 224 ==========================\r
 225 =\r
 226 = CA_FarRead\r
 227 =\r
 228 = Read from a file to a far pointer\r
 229 =\r
 230 ==========================\r
 231 */\r
 232 \r
 233 boolean CA_FarRead(int handle, byte far *dest, dword length, global_game_variables_t *gvar)\r
 234 {\r
 235         boolean flag=0;\r
 236         if (length>0xfffflu)\r
 237                 Quit (gvar, "CA_FarRead doesn't support 64K reads yet!");//TODO: EXPAND!!!\r
 238 \r
 239         __asm {\r
 240                 push    ds\r
 241                 mov     bx,[handle]\r
 242                 mov     cx,[WORD PTR length]\r
 243                 mov     dx,[WORD PTR dest]\r
 244                 mov     ds,[WORD PTR dest+2]\r
 245                 mov     ah,0x3f                         // READ w/handle\r
 246                 int     21h\r
 247                 pop     ds\r
 248                 jnc     good\r
 249                 mov     errno,ax\r
 250                 mov     flag,0\r
 251                 jmp End\r
 252 #ifdef __BORLANDC__\r
 253         }\r
 254 #endif\r
 255 good:\r
 256 #ifdef __BORLANDC__\r
 257         __asm {\r
 258 #endif\r
 259                 cmp     ax,[WORD PTR length]\r
 260                 je      done\r
 261 //              errno = EINVFMT;                        // user manager knows this is bad read\r
 262                 mov     flag,0\r
 263                 jmp End\r
 264 #ifdef __BORLANDC__\r
 265         }\r
 266 #endif\r
 267 done:\r
 268 #ifdef __BORLANDC__\r
 269         __asm {\r
 270 #endif\r
 271                 mov     flag,1\r
 272 #ifdef __BORLANDC__\r
 273         }\r
 274 #endif\r
 275 End:\r
 276 #ifdef __WATCOMC__\r
 277         }\r
 278 #endif\r
 279         return flag;\r
 280 }\r
 281 \r
 282 \r
 283 /*\r
 284 ==========================\r
 285 =\r
 286 = CA_FarWrite\r
 287 =\r
 288 = Write from a file to a far pointer\r
 289 =\r
 290 ==========================\r
 291 */\r
 292 \r
 293 boolean CA_FarWrite(int handle, byte far *source, dword length, global_game_variables_t *gvar)\r
 294 {\r
 295         boolean flag=0;\r
 296         if (length>0xfffflu)\r
 297                 Quit (gvar, "CA_FarWrite doesn't support 64K reads yet!");//TODO: EXPAND!!!\r
 298 \r
 299         __asm {\r
 300                 push    ds\r
 301                 mov     bx,[handle]\r
 302                 mov     cx,[WORD PTR length]\r
 303                 mov     dx,[WORD PTR source]\r
 304                 mov     ds,[WORD PTR source+2]\r
 305                 mov     ah,0x40                 // WRITE w/handle\r
 306                 int     21h\r
 307                 pop     ds\r
 308                 jnc     good\r
 309                 mov     errno,ax\r
 310                 mov flag,0\r
 311                 jmp End\r
 312 #ifdef __BORLANDC__\r
 313         }\r
 314 #endif\r
 315 good:\r
 316 #ifdef __BORLANDC__\r
 317         __asm {\r
 318 #endif\r
 319                 cmp     ax,[WORD PTR length]\r
 320                 je      done\r
 321 //              errno = ENOMEM;                         // user manager knows this is bad write\r
 322                 mov     flag,0\r
 323                 jmp End\r
 324 #ifdef __BORLANDC__\r
 325         }\r
 326 #endif\r
 327 done:\r
 328 #ifdef __BORLANDC__\r
 329         __asm {\r
 330 #endif\r
 331                 mov     flag,1\r
 332 #ifdef __BORLANDC__\r
 333         }\r
 334 #endif\r
 335 End:\r
 336 #ifdef __WATCOMC__\r
 337         }\r
 338 #endif\r
 339         return flag;\r
 340 }\r
 341 \r
 342 \r
 343 /*\r
 344 ==========================\r
 345 =\r
 346 = CA_ReadFile\r
 347 =\r
 348 = Reads a file into an allready allocated buffer\r
 349 =\r
 350 ==========================\r
 351 */\r
 352 \r
 353 boolean CA_ReadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)\r
 354 {\r
 355         int handle;\r
 356         sdword size;\r
 357         //long size;\r
 358 \r
 359         if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
 360                 return false;\r
 361 \r
 362         size = filelength(handle);\r
 363 #ifdef __DEBUG_CA__\r
 364         if(dbg_debugca>0){\r
 365                 printf("===============================================================================\n");\r
 366                 printf("                CA_ReadFile\n");\r
 367                 printf("===============================================================================\n");\r
 368                 //%04x\r
 369                 printf("        ptr=%Fp\n", ptr);\r
 370                 printf("        *ptr=%Fp\n", *ptr);\r
 371                 printf("        &ptr=%Fp\n", &ptr);\r
 372         }\r
 373 #endif\r
 374         if(!CA_FarRead(handle,*ptr,size, gvar))\r
 375         {\r
 376                 close(handle);\r
 377                 return false;\r
 378         }\r
 379         close(handle);\r
 380         return true;\r
 381 }\r
 382 \r
 383 \r
 384 /*\r
 385 ==========================\r
 386 =\r
 387 = CA_WriteFile\r
 388 =\r
 389 = Writes a file from a memory buffer\r
 390 =\r
 391 ==========================\r
 392 */\r
 393 \r
 394 boolean CA_WriteFile (char *filename, void far *ptr, long length, global_game_variables_t *gvar)\r
 395 {\r
 396         int handle;\r
 397         //sdword size;\r
 398         //long size;\r
 399 \r
 400         handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,\r
 401                                 S_IREAD | S_IWRITE | S_IFREG);\r
 402 \r
 403         if (handle == -1)\r
 404                 return false;\r
 405 \r
 406         if (!CA_FarWrite (handle,ptr,length, gvar))\r
 407         {\r
 408                 close(handle);\r
 409                 return false;\r
 410         }\r
 411         close(handle);\r
 412         return true;\r
 413 }\r
 414 \r
 415 \r
 416 \r
 417 /*\r
 418 ==========================\r
 419 =\r
 420 = CA_LoadFile\r
 421 =\r
 422 = Allocate space for and load a file\r
 423 =\r
 424 ==========================\r
 425 */\r
 426 \r
 427 boolean CA_LoadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)\r
 428 {\r
 429         int handle;\r
 430         sdword size;\r
 431         //long size;\r
 432 \r
 433         if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
 434                 return false;\r
 435 \r
 436         size = filelength(handle);\r
 437 #ifdef __DEBUG_CA__\r
 438         if(dbg_debugca>0){\r
 439                 printf("===============================================================================\n");\r
 440                 printf("                CA_LoadFile\n");\r
 441                 printf("===============================================================================\n");\r
 442                 //%04x\r
 443                 printf("        ptr=%Fp\n", ptr);\r
 444                 printf("        *ptr=%Fp\n", *ptr);\r
 445                 printf("        &ptr=%Fp\n", &ptr);\r
 446         }\r
 447 #endif\r
 448         MM_GetPtr(ptr,size, gvar);\r
 449 #ifdef __DEBUG_CA__\r
 450         if(dbg_debugca>0){\r
 451                 //%04x\r
 452                 printf("---------------------------------------\n");\r
 453                 printf("        ptr=%Fp\n", ptr);\r
 454                 printf("        *ptr=%Fp\n", *ptr);\r
 455                 printf("        &ptr=%Fp\n", &ptr);\r
 456                 printf("-------------------------------------------------------------------------------\n");\r
 457         }\r
 458 #endif\r
 459         if(!CA_FarRead(handle,*ptr,size, gvar))\r
 460         {\r
 461                 close(handle);\r
 462                 return false;\r
 463         }\r
 464         close(handle);\r
 465         return true;\r
 466 }\r
 467 \r
 468 /*\r
 469 ============================================================================\r
 470 \r
 471                 COMPRESSION routines, see JHUFF.C for more\r
 472 \r
 473 ============================================================================\r
 474 */\r
 475 \r
 476 \r
 477 \r
 478 /*\r
 479 ===============\r
 480 =\r
 481 = CAL_OptimizeNodes\r
 482 =\r
 483 = Goes through a huffman table and changes the 256-511 node numbers to the\r
 484 = actular address of the node.  Must be called before CAL_HuffExpand\r
 485 =\r
 486 ===============\r
 487 */\r
 488 \r
 489 void CAL_OptimizeNodes(huffnode *table)\r
 490 {\r
 491   huffnode *node;\r
 492   int i;\r
 493 \r
 494   node = table;\r
 495 \r
 496   for (i=0;i<255;i++)\r
 497   {\r
 498         if (node->bit0 >= 256)\r
 499           node->bit0 = (unsigned)(table+(node->bit0-256));\r
 500         if (node->bit1 >= 256)\r
 501           node->bit1 = (unsigned)(table+(node->bit1-256));\r
 502         node++;\r
 503   }\r
 504 }\r
 505 \r
 506 \r
 507 \r
 508 /*\r
 509 ======================\r
 510 =\r
 511 = CAL_HuffExpand\r
 512 =\r
 513 = Length is the length of the EXPANDED data\r
 514 =\r
 515 ======================\r
 516 */\r
 517 \r
 518 void CAL_HuffExpand (byte far *source, byte far *dest,\r
 519   long length,huffnode *hufftable)\r
 520 {\r
 521 //  unsigned bit,byte,node,code;\r
 522   unsigned sourceseg,sourceoff,destseg,destoff,endoff;\r
 523         huffnode *headptr;\r
 524 //  huffnode *nodeon;\r
 525 \r
 526         headptr = hufftable+254;        // head node is allways node 254\r
 527 \r
 528   source++;     // normalize\r
 529   source--;\r
 530   dest++;\r
 531   dest--;\r
 532 \r
 533   sourceseg = FP_SEG(source);\r
 534   sourceoff = FP_OFF(source);\r
 535   destseg = FP_SEG(dest);\r
 536   destoff = FP_OFF(dest);\r
 537   endoff = destoff+length;\r
 538 \r
 539 //\r
 540 // ds:si source\r
 541 // es:di dest\r
 542 // ss:bx node pointer\r
 543 //\r
 544 \r
 545         if (length <0xfff0)\r
 546         {\r
 547 \r
 548 //--------------------------\r
 549 // expand less than 64k of data\r
 550 //--------------------------\r
 551 \r
 552         __asm {\r
 553                 mov     bx,[word ptr headptr]\r
 554 \r
 555                 mov     si,[sourceoff]\r
 556                 mov     di,[destoff]\r
 557                 mov     es,[destseg]\r
 558                 mov     ds,[sourceseg]\r
 559                 mov     ax,[endoff]\r
 560 \r
 561                 mov     ch,[si]                         // load first byte\r
 562                 inc     si\r
 563                 mov     cl,1\r
 564 #ifdef __BORLANDC__\r
 565         }\r
 566 #endif\r
 567 expandshort:\r
 568 #ifdef __BORLANDC__\r
 569         __asm {\r
 570 #endif\r
 571                 test    ch,cl                   // bit set?\r
 572                 jnz     bit1short\r
 573                 mov     dx,[ss:bx]                      // take bit0 path from node\r
 574                 shl     cl,1                            // advance to next bit position\r
 575                 jc      newbyteshort\r
 576                 jnc     sourceupshort\r
 577 #ifdef __BORLANDC__\r
 578         }\r
 579 #endif\r
 580 bit1short:\r
 581 #ifdef __BORLANDC__\r
 582         __asm {\r
 583 #endif\r
 584                 mov     dx,[ss:bx+2]            // take bit1 path\r
 585                 shl     cl,1                            // advance to next bit position\r
 586                 jnc     sourceupshort\r
 587 #ifdef __BORLANDC__\r
 588         }\r
 589 #endif\r
 590 newbyteshort:\r
 591 #ifdef __BORLANDC__\r
 592         __asm {\r
 593 #endif\r
 594                 mov     ch,[si]                         // load next byte\r
 595                 inc     si\r
 596                 mov     cl,1                            // back to first bit\r
 597 #ifdef __BORLANDC__\r
 598         }\r
 599 #endif\r
 600 sourceupshort:\r
 601 #ifdef __BORLANDC__\r
 602         __asm {\r
 603 #endif\r
 604                 or      dh,dh                           // if dx<256 its a byte, else move node\r
 605                 jz      storebyteshort\r
 606                 mov     bx,dx                           // next node = (huffnode *)code\r
 607                 jmp     expandshort\r
 608 #ifdef __BORLANDC__\r
 609         }\r
 610 #endif\r
 611 storebyteshort:\r
 612 #ifdef __BORLANDC__\r
 613         __asm {\r
 614 #endif\r
 615                 mov     [es:di],dl\r
 616                 inc     di                                      // write a decopmpressed byte out\r
 617                 mov     bx,[word ptr headptr]           // back to the head node for next bit\r
 618 \r
 619                 cmp     di,ax                           // done?\r
 620                 jne     expandshort\r
 621         }\r
 622         }\r
 623         else\r
 624         {\r
 625 \r
 626 //--------------------------\r
 627 // expand more than 64k of data\r
 628 //--------------------------\r
 629 \r
 630   length--;\r
 631 \r
 632         __asm {\r
 633                 mov     bx,[word ptr headptr]\r
 634                 mov     cl,1\r
 635 \r
 636                 mov     si,[sourceoff]\r
 637                 mov     di,[destoff]\r
 638                 mov     es,[destseg]\r
 639                 mov     ds,[sourceseg]\r
 640 \r
 641                 lodsb                   // load first byte\r
 642 #ifdef __BORLANDC__\r
 643         }\r
 644 #endif\r
 645 expand:\r
 646 #ifdef __BORLANDC__\r
 647         __asm {\r
 648 #endif\r
 649                 test    al,cl           // bit set?\r
 650                 jnz     bit1\r
 651                 mov     dx,[ss:bx]      // take bit0 path from node\r
 652                 jmp     gotcode\r
 653 #ifdef __BORLANDC__\r
 654         }\r
 655 #endif\r
 656 bit1:\r
 657 #ifdef __BORLANDC__\r
 658         __asm {\r
 659 #endif\r
 660                 mov     dx,[ss:bx+2]    // take bit1 path\r
 661 #ifdef __BORLANDC__\r
 662         }\r
 663 #endif\r
 664 gotcode:\r
 665 #ifdef __BORLANDC__\r
 666         __asm {\r
 667 #endif\r
 668                 shl     cl,1            // advance to next bit position\r
 669                 jnc     sourceup\r
 670                 lodsb\r
 671                 cmp     si,0x10         // normalize ds:si\r
 672                 jb      sinorm\r
 673                 mov     cx,ds\r
 674                 inc     cx\r
 675                 mov     ds,cx\r
 676                 xor     si,si\r
 677 #ifdef __BORLANDC__\r
 678         }\r
 679 #endif\r
 680 sinorm:\r
 681 #ifdef __BORLANDC__\r
 682         __asm {\r
 683 #endif\r
 684                 mov     cl,1            // back to first bit\r
 685 #ifdef __BORLANDC__\r
 686         }\r
 687 #endif\r
 688 sourceup:\r
 689 #ifdef __BORLANDC__\r
 690         __asm {\r
 691 #endif\r
 692                 or      dh,dh           // if dx<256 its a byte, else move node\r
 693                 jz      storebyte\r
 694                 mov     bx,dx           // next node = (huffnode *)code\r
 695                 jmp     expand\r
 696 #ifdef __BORLANDC__\r
 697         }\r
 698 #endif\r
 699 storebyte:\r
 700 #ifdef __BORLANDC__\r
 701         __asm {\r
 702 #endif\r
 703                 mov     [es:di],dl\r
 704                 inc     di              // write a decopmpressed byte out\r
 705                 mov     bx,[word ptr headptr]   // back to the head node for next bit\r
 706 \r
 707                 cmp     di,0x10         // normalize es:di\r
 708                 jb      dinorm\r
 709                 mov     dx,es\r
 710                 inc     dx\r
 711                 mov     es,dx\r
 712                 xor     di,di\r
 713 #ifdef __BORLANDC__\r
 714         }\r
 715 #endif\r
 716 dinorm:\r
 717 #ifdef __BORLANDC__\r
 718         __asm {\r
 719 #endif\r
 720                 sub     [WORD PTR ss:length],1\r
 721                 jnc     expand\r
 722                 dec     [WORD PTR ss:length+2]\r
 723                 jns     expand          // when length = ffff ffff, done\r
 724         }\r
 725         }\r
 726 \r
 727         __asm {\r
 728                 mov     ax,ss\r
 729                 mov     ds,ax\r
 730         }\r
 731 \r
 732 }\r
 733 \r
 734 \r
 735 /*\r
 736 ======================\r
 737 =\r
 738 = CAL_CarmackExpand\r
 739 =\r
 740 = Length is the length of the EXPANDED data\r
 741 =\r
 742 ======================\r
 743 */\r
 744 \r
 745 #define NEARTAG 0xa7\r
 746 #define FARTAG  0xa8\r
 747 \r
 748 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)\r
 749 {\r
 750         unsigned        ch,chhigh,count,offset;\r
 751         unsigned        far *copyptr, far *inptr, far *outptr;\r
 752 \r
 753         length/=2;\r
 754 \r
 755         inptr = source;\r
 756         outptr = dest;\r
 757 \r
 758         while (length)\r
 759         {\r
 760                 ch = *inptr++;\r
 761                 chhigh = ch>>8;\r
 762                 if (chhigh == NEARTAG)\r
 763                 {\r
 764                         count = ch&0xff;\r
 765                         if (!count)\r
 766                         {                               // have to insert a word containing the tag byte\r
 767                                 ch |= *(/*(unsigned char far *)*/inptr)++;\r
 768                                 *outptr++ = ch;\r
 769                                 length--;\r
 770                         }\r
 771                         else\r
 772                         {\r
 773                                 offset = *(/*(unsigned char far *)*/inptr)++;\r
 774                                 copyptr = outptr - offset;\r
 775                                 length -= count;\r
 776                                 while (count--)\r
 777                                         *outptr++ = *copyptr++;\r
 778                         }\r
 779                 }\r
 780                 else if (chhigh == FARTAG)\r
 781                 {\r
 782                         count = ch&0xff;\r
 783                         if (!count)\r
 784                         {                               // have to insert a word containing the tag byte\r
 785                                 ch |= *(/*(unsigned char far *)*/inptr)++;\r
 786                                 *outptr++ = ch;\r
 787                                 length --;\r
 788                         }\r
 789                         else\r
 790                         {\r
 791                                 offset = *inptr++;\r
 792                                 copyptr = dest + offset;\r
 793                                 length -= count;\r
 794                                 while (count--)\r
 795                                         *outptr++ = *copyptr++;\r
 796                         }\r
 797                 }\r
 798                 else\r
 799                 {\r
 800                         *outptr++ = ch;\r
 801                         length --;\r
 802                 }\r
 803         }\r
 804 }\r
 805 \r
 806 \r
 807 /*\r
 808 ======================\r
 809 =\r
 810 = CA_RLEWcompress\r
 811 =\r
 812 ======================\r
 813 */\r
 814 \r
 815 long CA_RLEWCompress (unsigned far *source, long length, unsigned far *dest,\r
 816   unsigned rlewtag)\r
 817 {\r
 818   long complength;\r
 819   unsigned value,count,i;\r
 820   unsigned far *start,far *end;\r
 821 \r
 822   start = dest;\r
 823 \r
 824   end = source + (length+1)/2;\r
 825 \r
 826 //\r
 827 // compress it\r
 828 //\r
 829   do\r
 830   {\r
 831         count = 1;\r
 832         value = *source++;\r
 833         while (*source == value && source<end)\r
 834         {\r
 835           count++;\r
 836           source++;\r
 837         }\r
 838         if (count>3 || value == rlewtag)\r
 839         {\r
 840     //\r
 841     // send a tag / count / value string\r
 842     //\r
 843       *dest++ = rlewtag;\r
 844       *dest++ = count;\r
 845       *dest++ = value;\r
 846     }\r
 847     else\r
 848     {\r
 849     //\r
 850     // send word without compressing\r
 851     //\r
 852       for (i=1;i<=count;i++)\r
 853         *dest++ = value;\r
 854         }\r
 855 \r
 856   } while (source<end);\r
 857 \r
 858   complength = 2*(dest-start);\r
 859   return complength;\r
 860 }\r
 861 \r
 862 \r
 863 /*\r
 864 ======================\r
 865 =\r
 866 = CA_RLEWexpand\r
 867 = length is EXPANDED length\r
 868 =\r
 869 ======================\r
 870 */\r
 871 \r
 872 void CA_RLEWexpand (unsigned far *source, unsigned far *dest,long length,\r
 873   unsigned rlewtag)\r
 874 {\r
 875 //  unsigned value,count,i;\r
 876   unsigned far *end;\r
 877   unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;\r
 878 \r
 879 \r
 880 //\r
 881 // expand it\r
 882 //\r
 883 #if 0\r
 884   do\r
 885   {\r
 886         value = *source++;\r
 887         if (value != rlewtag)\r
 888         //\r
 889         // uncompressed\r
 890         //\r
 891           *dest++=value;\r
 892         else\r
 893         {\r
 894         //\r
 895         // compressed string\r
 896         //\r
 897           count = *source++;\r
 898           value = *source++;\r
 899           for (i=1;i<=count;i++)\r
 900         *dest++ = value;\r
 901         }\r
 902   } while (dest<end);\r
 903 #endif\r
 904 \r
 905   end = dest + (length)/2;\r
 906   sourceseg = FP_SEG(source);\r
 907   sourceoff = FP_OFF(source);\r
 908   destseg = FP_SEG(dest);\r
 909   destoff = FP_OFF(dest);\r
 910   endseg = FP_SEG(end);\r
 911   endoff = FP_OFF(end);\r
 912 \r
 913 \r
 914 //\r
 915 // ax = source value\r
 916 // bx = tag value\r
 917 // cx = repeat counts\r
 918 // dx = scratch\r
 919 //\r
 920 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!\r
 921 //\r
 922         __asm {\r
 923                 mov     bx,rlewtag\r
 924                 mov     si,sourceoff\r
 925                 mov     di,destoff\r
 926                 mov     es,destseg\r
 927                 mov     ds,sourceseg\r
 928 #ifdef __BORLANDC__\r
 929         }\r
 930 #endif\r
 931 expand:\r
 932 #ifdef __BORLANDC__\r
 933         __asm {\r
 934 #endif\r
 935                 lodsw\r
 936                 cmp     ax,bx\r
 937                 je      repeat\r
 938                 stosw\r
 939                 jmp     next\r
 940 #ifdef __BORLANDC__\r
 941         }\r
 942 #endif\r
 943 repeat:\r
 944 #ifdef __BORLANDC__\r
 945         __asm {\r
 946 #endif\r
 947                 lodsw\r
 948                 mov     cx,ax           // repeat count\r
 949                 lodsw                   // repeat value\r
 950                 rep stosw\r
 951 #ifdef __BORLANDC__\r
 952         }\r
 953 #endif\r
 954 next:\r
 955 #ifdef __BORLANDC__\r
 956         __asm {\r
 957 #endif\r
 958                 cmp     si,0x10         // normalize ds:si\r
 959                 jb      sinorm\r
 960                 mov     ax,si\r
 961                 shr     ax,1\r
 962                 shr     ax,1\r
 963                 shr     ax,1\r
 964                 shr     ax,1\r
 965                 mov     dx,ds\r
 966                 add     dx,ax\r
 967                 mov     ds,dx\r
 968                 and     si,0xf\r
 969 #ifdef __BORLANDC__\r
 970         }\r
 971 #endif\r
 972 sinorm:\r
 973 #ifdef __BORLANDC__\r
 974         __asm {\r
 975 #endif\r
 976                 cmp     di,0x10         // normalize es:di\r
 977                 jb      dinorm\r
 978                 mov     ax,di\r
 979                 shr     ax,1\r
 980                 shr     ax,1\r
 981                 shr     ax,1\r
 982                 shr     ax,1\r
 983                 mov     dx,es\r
 984                 add     dx,ax\r
 985                 mov     es,dx\r
 986                 and     di,0xf\r
 987 #ifdef __BORLANDC__\r
 988         }\r
 989 #endif\r
 990 dinorm:\r
 991 #ifdef __BORLANDC__\r
 992         __asm {\r
 993 #endif\r
 994                 cmp     di,ss:endoff\r
 995                 jne     expand\r
 996                 mov     ax,es\r
 997                 cmp     ax,ss:endseg\r
 998                 jb      expand\r
 999 \r
1000                 mov     ax,ss\r
1001                 mov     ds,ax\r
1002         }\r
1003 }\r
1004 \r
1005 \r
1006 /*\r
1007 =============================================================================\r
1008 \r
1009                                          CACHE MANAGER ROUTINES\r
1010 \r
1011 =============================================================================\r
1012 */\r
1013 \r
1014 /*\r
1015 ======================\r
1016 =\r
1017 = CAL_SetupGrFile\r
1018 =\r
1019 ======================\r
1020 */\r
1021 \r
1022 void CAL_SetupGrFile (global_game_variables_t *gvar)\r
1023 {\r
1024         char fname[13];\r
1025         int handle;\r
1026 #if NUMPICS>0\r
1027         memptr compseg;\r
1028 #endif\r
1029 \r
1030 #ifdef GRHEADERLINKED\r
1031 \r
1032         gvar->ca.grhuffman = (huffnode *)&VGAdict;\r
1033         grstarts = (long _seg *)FP_SEG(&VGAhead);\r
1034 \r
1035         CAL_OptimizeNodes (gvar->ca.grhuffman);\r
1036 \r
1037 #else\r
1038 \r
1039 //\r
1040 // load ???dict.ext (huffman dictionary for graphics files)\r
1041 //\r
1042 \r
1043         strcpy(fname,GDICTNAME);\r
1044         strcat(fname,EXTENSION);\r
1045 \r
1046         if ((handle = open(fname,\r
1047                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1048                 CA_CannotOpen(fname,gvar);\r
1049 \r
1050         read(handle, &gvar->ca.grhuffman, sizeof(gvar->ca.grhuffman));\r
1051         close(handle);\r
1052         CAL_OptimizeNodes (gvar->ca.grhuffman);\r
1053 //\r
1054 // load the data offsets from ???head.ext\r
1055 //\r
1056         MM_GetPtr (MEMPTRCONV gvar->ca.grstarts,(NUMCHUNKS+1)*FILEPOSSIZE, gvar);\r
1057 \r
1058         strcpy(fname,GHEADNAME);\r
1059         strcat(fname,EXTENSION);\r
1060 \r
1061         if ((handle = open(fname,\r
1062                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1063                 CA_CannotOpen(fname,gvar);\r
1064 \r
1065         CA_FarRead(handle, (memptr)gvar->ca.grstarts, (NUMCHUNKS+1)*FILEPOSSIZE, gvar);\r
1066 \r
1067         close(handle);\r
1068 \r
1069 \r
1070 #endif\r
1071 \r
1072 //\r
1073 // Open the graphics file, leaving it open until the game is finished\r
1074 //\r
1075         strcpy(fname,GFILENAME);\r
1076         strcat(fname,EXTENSION);\r
1077 \r
1078         gvar->ca.file.grhandle = open(fname, O_RDONLY | O_BINARY);\r
1079         if (gvar->ca.file.grhandle == -1)\r
1080                 CA_CannotOpen(fname,gvar);\r
1081 \r
1082 \r
1083 //\r
1084 // load the pic and sprite headers into the arrays in the data segment\r
1085 //\r
1086 #if NUMPICS>0\r
1087         MM_GetPtr(MEMPTRCONV gvar->video.pictable,NUMPICS*sizeof(pictabletype),gvar);\r
1088         CAL_GetGrChunkLength(STRUCTPIC,gvar);           // position file pointer\r
1089         printf("CAL_SetupGrFile:\n");\r
1090         printf("        gvar->ca.chunkcomplen size is %lu\n", gvar->ca.chunkcomplen);\r
1091         MM_GetPtr(MEMPTRANDPERCONV compseg,gvar->ca.chunkcomplen,gvar);                                                         IN_Ack(gvar);\r
1092         CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen,gvar);\r
1093         CAL_HuffExpand (compseg, (byte far *)gvar->video.pictable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);\r
1094         MM_FreePtr(MEMPTRANDPERCONV compseg,gvar);\r
1095 #endif\r
1096 \r
1097 #if 0\r
1098         //NUMPICM>0\r
1099         MM_GetPtr(MEMPTRCONV picmtable,NUMPICM*sizeof(pictabletype));\r
1100         CAL_GetGrChunkLength(STRUCTPICM);               // position file pointer\r
1101         MM_GetPtr(&compseg,gvar->ca.chunkcomplen);\r
1102         CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);\r
1103         CAL_HuffExpand (compseg, (byte far *)picmtable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);\r
1104         MM_FreePtr(&compseg);\r
1105 //#endif\r
1106 \r
1107 //#if NUMSPRITES>0\r
1108         MM_GetPtr(MEMPTRCONV spritetable,NUMSPRITES*sizeof(spritetabletype));\r
1109         CAL_GetGrChunkLength(STRUCTSPRITE);     // position file pointer\r
1110         MM_GetPtr(&compseg,gvar->ca.chunkcomplen);\r
1111         CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);\r
1112         CAL_HuffExpand (compseg, (byte far *)spritetable,NUMSPRITES*sizeof(spritetabletype),gvar->ca.grhuffman);\r
1113         MM_FreePtr(&compseg);\r
1114 #endif\r
1115 \r
1116 }\r
1117 \r
1118 //==========================================================================\r
1119 \r
1120 \r
1121 /*\r
1122 ======================\r
1123 =\r
1124 = CAL_SetupMapFile\r
1125 =\r
1126 ======================\r
1127 */\r
1128 \r
1129 void CAL_SetupMapFile (global_game_variables_t *gvar)\r
1130 {\r
1131 #ifndef MAPHEADERLINKED\r
1132         int handle;\r
1133         long length;\r
1134 #endif\r
1135 \r
1136 //\r
1137 // load maphead.ext (offsets and tileinfo for map file)\r
1138 //\r
1139 #ifndef MAPHEADERLINKED\r
1140         if ((handle = open("maphead.mph",\r
1141                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1142                 Quit (gvar, "Can't open maphead.mph");\r
1143         length = filelength(handle);\r
1144         MM_GetPtr (MEMPTRCONV gvar->ca.tinf,length,gvar);\r
1145         CA_FarRead(handle, gvar->ca.tinf, length,gvar);\r
1146         close(handle);\r
1147 #else\r
1148 \r
1149         gvar->ca.tinf = (byte _seg *)FP_SEG(&maphead);\r
1150 \r
1151 #endif\r
1152 \r
1153 //\r
1154 // open the data file\r
1155 //\r
1156 //TODO: multiple files\r
1157         if ((gvar->ca.file.maphandle = open("data/test.map",\r
1158                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1159                 Quit (gvar, "Can't open data/test.map!");\r
1160 /*#ifdef MAPHEADERLINKED\r
1161         if ((maphandle = open("GAMEMAPS.16"ENSION,\r
1162                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1163                 Quit (gvar, "Can't open GAMEMAPS.16"ENSION"!");\r
1164 #else\r
1165         if ((maphandle = open("MAPTEMP.16"ENSION,\r
1166                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1167                 Quit (gvar, "Can't open MAPTEMP.16"ENSION"!");\r
1168 #endif*/\r
1169 }\r
1170 \r
1171 //==========================================================================\r
1172 \r
1173 \r
1174 /*\r
1175 ======================\r
1176 =\r
1177 = CAL_SetupAudioFile\r
1178 =\r
1179 ======================\r
1180 */\r
1181 \r
1182 /*void CAL_SetupAudioFile (void)\r
1183 {\r
1184         int handle;\r
1185         long length;\r
1186 \r
1187 //\r
1188 // load maphead.ext (offsets and tileinfo for map file)\r
1189 //\r
1190 #ifndef AUDIOHEADERLINKED\r
1191         if ((handle = open("AUDIOHED.16",\r
1192                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1193                 Quit (gvar, "Can't open AUDIOHED.16""!");\r
1194         length = filelength(handle);\r
1195         MM_GetPtr (MEMPTRCONV audiostarts,length);\r
1196         CA_FarRead(handle, (byte far *)audiostarts, length);\r
1197         close(handle);\r
1198 #else\r
1199         audiohuffman = (huffnode *)&audiodict;\r
1200         CAL_OptimizeNodes (audiohuffman);\r
1201         audiostarts = (long _seg *)FP_SEG(&audiohead);\r
1202 #endif\r
1203 \r
1204 //\r
1205 // open the data file\r
1206 //\r
1207 #ifndef AUDIOHEADERLINKED\r
1208         if ((audiohandle = open("AUDIOT.16",\r
1209                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1210                 Quit (gvar, "Can't open AUDIOT.16""!");\r
1211 #else\r
1212         if ((audiohandle = open("AUDIO.16",\r
1213                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1214                 Quit (gvar, "Can't open AUDIO.16""!");\r
1215 #endif\r
1216 }*/\r
1217 \r
1218 //==========================================================================\r
1219 \r
1220 \r
1221 /*\r
1222 ======================\r
1223 =\r
1224 = CA_Startup\r
1225 =\r
1226 = Open all files and load in headers\r
1227 =\r
1228 ======================\r
1229 */\r
1230 \r
1231 void CA_Startup(global_game_variables_t *gvar)\r
1232 {\r
1233 #ifdef PROFILE\r
1234 #ifdef __BORLANDC__\r
1235         unlink("profile.16b");\r
1236         gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);\r
1237 #endif\r
1238 #ifdef __WATCOMC__\r
1239         unlink("profile.16w");\r
1240         gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);\r
1241 #endif\r
1242 #endif//profile\r
1243 \r
1244 #ifdef __BORLANDC__\r
1245         unlink("meminfo.16b");\r
1246         gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);\r
1247 #endif\r
1248 #ifdef __WATCOMC__\r
1249         unlink("meminfo.16w");\r
1250         gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);\r
1251 #endif\r
1252 \r
1253 \r
1254 #ifndef NOMAPS\r
1255         CAL_SetupMapFile (gvar);\r
1256 #endif\r
1257 #ifndef NOGRAPHICS\r
1258         CAL_SetupGrFile (gvar);\r
1259 #endif\r
1260 #ifndef NOAUDIO\r
1261         CAL_SetupMapFile (gvar);\r
1262 #endif\r
1263 \r
1264         gvar->ca.mapon = -1;\r
1265         gvar->ca.ca_levelbit = 1;\r
1266         gvar->ca.ca_levelnum = 0;\r
1267 \r
1268 /*      drawcachebox    = CAL_DialogDraw;\r
1269         updatecachebox  = CAL_DialogUpdate;\r
1270         finishcachebox  = CAL_DialogFinish;*/\r
1271 }\r
1272 \r
1273 //==========================================================================\r
1274 \r
1275 \r
1276 /*\r
1277 ======================\r
1278 =\r
1279 = CA_Shutdown\r
1280 =\r
1281 = Closes all files\r
1282 =\r
1283 ======================\r
1284 */\r
1285 \r
1286 void CA_Shutdown(global_game_variables_t *gvar)\r
1287 {\r
1288 #ifdef PROFILE\r
1289         close(gvar->handle.profilehandle);\r
1290 #endif\r
1291         close(gvar->handle.showmemhandle);\r
1292 \r
1293         close(gvar->ca.file.maphandle);\r
1294         close(gvar->ca.file.grhandle);\r
1295         close(gvar->ca.file.audiohandle);\r
1296 }\r
1297 \r
1298 //===========================================================================\r
1299 \r
1300 /*\r
1301 ======================\r
1302 =\r
1303 = CA_CacheAudioChunk\r
1304 =\r
1305 ======================\r
1306 */\r
1307 /*++++\r
1308 void CA_CacheAudioChunk (int chunk)\r
1309 {\r
1310         long    pos,compressed;\r
1311 #ifdef AUDIOHEADERLINKED\r
1312         long    expanded;\r
1313         memptr  bigbufferseg;\r
1314         byte    far *source;\r
1315 #endif\r
1316 \r
1317         if (audiosegs[chunk])\r
1318         {\r
1319                 MM_SetPurge (MEMPTRCONV audiosegs[chunk],0);\r
1320                 return;                                                 // allready in memory\r
1321         }\r
1322 \r
1323 // MDM begin - (GAMERS EDGE)\r
1324 //\r
1325         if (!FindFile("AUDIO.16",NULL,2))\r
1326                 Quit (gvar, "CA_CacheAudioChunk(): Can't find audio files.");\r
1327 //\r
1328 // MDM end\r
1329 \r
1330 //\r
1331 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate\r
1332 // a larger buffer\r
1333 //\r
1334         pos = audiostarts[chunk];\r
1335         compressed = audiostarts[chunk+1]-pos;\r
1336 \r
1337         lseek(audiohandle,pos,SEEK_SET);\r
1338 \r
1339 #ifndef AUDIOHEADERLINKED\r
1340 \r
1341         MM_GetPtr (MEMPTRCONV audiosegs[chunk],compressed);\r
1342         if (mmerror)\r
1343                 return;\r
1344 \r
1345         CA_FarRead(audiohandle,audiosegs[chunk],compressed);\r
1346 \r
1347 #else\r
1348 \r
1349         if (compressed<=BUFFERSIZE)\r
1350         {\r
1351                 CA_FarRead(audiohandle,bufferseg,compressed);\r
1352                 source = bufferseg;\r
1353         }\r
1354         else\r
1355         {\r
1356                 MM_GetPtr(&bigbufferseg,compressed);\r
1357                 if (mmerror)\r
1358                         return;\r
1359                 MM_SetLock (&bigbufferseg,true);\r
1360                 CA_FarRead(audiohandle,bigbufferseg,compressed);\r
1361                 source = bigbufferseg;\r
1362         }\r
1363 \r
1364         expanded = *(long far *)source;\r
1365         source += 4;                    // skip over length\r
1366         MM_GetPtr (MEMPTRCONV audiosegs[chunk],expanded);\r
1367         if (mmerror)\r
1368                 goto done;\r
1369         CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);\r
1370 \r
1371 done:\r
1372         if (compressed>BUFFERSIZE)\r
1373                 MM_FreePtr(&bigbufferseg);\r
1374 #endif\r
1375 }*/\r
1376 \r
1377 //===========================================================================\r
1378 \r
1379 /*\r
1380 ======================\r
1381 =\r
1382 = CA_LoadAllSounds\r
1383 =\r
1384 = Purges all sounds, then loads all new ones (mode switch)\r
1385 =\r
1386 ======================\r
1387 */\r
1388 /*++++\r
1389 void CA_LoadAllSounds (void)\r
1390 {\r
1391         unsigned        start,i;\r
1392 \r
1393         switch (oldsoundmode)\r
1394         {\r
1395         case sdm_Off:\r
1396                 goto cachein;\r
1397         case sdm_PC:\r
1398                 start = STARTPCSOUNDS;\r
1399                 break;\r
1400         case sdm_AdLib:\r
1401                 start = STARTADLIBSOUNDS;\r
1402                 break;\r
1403         }\r
1404 \r
1405         for (i=0;i<NUMSOUNDS;i++,start++)\r
1406                 if (audiosegs[start])\r
1407                         MM_SetPurge (MEMPTRCONV audiosegs[start],3);            // make purgable\r
1408 \r
1409 cachein:\r
1410 \r
1411         switch (SoundMode)\r
1412         {\r
1413         case sdm_Off:\r
1414                 return;\r
1415         case sdm_PC:\r
1416                 start = STARTPCSOUNDS;\r
1417                 break;\r
1418         case sdm_AdLib:\r
1419                 start = STARTADLIBSOUNDS;\r
1420                 break;\r
1421         }\r
1422 \r
1423         for (i=0;i<NUMSOUNDS;i++,start++)\r
1424                 CA_CacheAudioChunk (start);\r
1425 \r
1426         oldsoundmode = SoundMode;\r
1427 }*/\r
1428 \r
1429 //===========================================================================\r
1430 \r
1431 //????#if GRMODE == EGAGR\r
1432 \r
1433 /*\r
1434 ======================\r
1435 =\r
1436 = CAL_ShiftSprite\r
1437 =\r
1438 = Make a shifted (one byte wider) copy of a sprite into another area\r
1439 =\r
1440 ======================\r
1441 */\r
1442 /*++++\r
1443 unsigned        static  sheight,swidth;\r
1444 boolean static dothemask;\r
1445 \r
1446 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,\r
1447         unsigned width, unsigned height, unsigned pixshift, boolean domask, global_game_variables_t *gvar)\r
1448 {\r
1449 \r
1450         sheight = height;               // because we are going to reassign bp\r
1451         swidth = width;\r
1452         dothemask = domask;\r
1453 \r
1454         __asm {\r
1455                 mov     ax,[segment]\r
1456                 mov     ds,ax           // source and dest are in same segment, and all local\r
1457 \r
1458                 mov     bx,[source]\r
1459                 mov     di,[dest]\r
1460 \r
1461                 mov     bp,[pixshift]\r
1462                 shl     bp,1\r
1463                 mov     bp,WORD PTR [shifttabletable+bp]        // bp holds pointer to shift table\r
1464 //              mov     bp,WORD PTR [gvar->video.shifttabletable+bp]    // bp holds pointer to shift table\r
1465 \r
1466                 cmp     [ss:dothemask],0\r
1467                 je              skipmask\r
1468 \r
1469 //\r
1470 // table shift the mask\r
1471 //\r
1472                 mov     dx,[ss:sheight]\r
1473 #ifdef __BORLANDC__\r
1474         }\r
1475 #endif\r
1476 domaskrow:\r
1477 #ifdef __BORLANDC__\r
1478         __asm {\r
1479 #endif\r
1480                 mov     BYTE PTR [di],255       // 0xff first byte\r
1481                 mov     cx,ss:[swidth]\r
1482 #ifdef __BORLANDC__\r
1483         }\r
1484 #endif\r
1485 domaskbyte:\r
1486 #ifdef __BORLANDC__\r
1487         __asm {\r
1488 #endif\r
1489                 mov     al,[bx]                         // source\r
1490                 not     al\r
1491                 inc     bx                                      // next source byte\r
1492                 xor     ah,ah\r
1493                 shl     ax,1\r
1494                 mov     si,ax\r
1495                 mov     ax,[bp+si]                      // table shift into two bytes\r
1496                 not     ax\r
1497                 and     [di],al                         // and with first byte\r
1498                 inc     di\r
1499                 mov     [di],ah                         // replace next byte\r
1500 \r
1501                 loop    domaskbyte\r
1502 \r
1503                 inc     di                                      // the last shifted byte has 1s in it\r
1504                 dec     dx\r
1505                 jnz     domaskrow\r
1506 #ifdef __BORLANDC__\r
1507         }\r
1508 #endif\r
1509 skipmask:\r
1510 #ifdef __BORLANDC__\r
1511         __asm {\r
1512 #endif\r
1513 //\r
1514 // table shift the data\r
1515 //\r
1516                 mov     dx,ss:[sheight]\r
1517                 shl     dx,1\r
1518                 shl     dx,1                            // four planes of data\r
1519 #ifdef __BORLANDC__\r
1520         }\r
1521 #endif\r
1522 dodatarow:\r
1523 #ifdef __BORLANDC__\r
1524         __asm {\r
1525 #endif\r
1526                 mov     BYTE PTR [di],0         // 0 first byte\r
1527                 mov     cx,ss:[swidth]\r
1528 #ifdef __BORLANDC__\r
1529         }\r
1530 #endif\r
1531 dodatabyte:\r
1532 #ifdef __BORLANDC__\r
1533         __asm {\r
1534 #endif\r
1535                 mov     al,[bx]                         // source\r
1536                 inc     bx                                      // next source byte\r
1537                 xor     ah,ah\r
1538                 shl     ax,1\r
1539                 mov     si,ax\r
1540                 mov     ax,[bp+si]                      // table shift into two bytes\r
1541                 or      [di],al                         // or with first byte\r
1542                 inc     di\r
1543                 mov     [di],ah                         // replace next byte\r
1544 \r
1545                 loop    dodatabyte\r
1546 \r
1547                 inc     di                                      // the last shifted byte has 0s in it\r
1548                 dec     dx\r
1549                 jnz     dodatarow\r
1550 \r
1551 //\r
1552 // done\r
1553 //\r
1554 \r
1555                 mov     ax,ss                           // restore data segment\r
1556                 mov     ds,ax\r
1557         }\r
1558 \r
1559 }\r
1560 \r
1561 #endif\r
1562 */\r
1563 //===========================================================================\r
1564 \r
1565 /*\r
1566 ======================\r
1567 =\r
1568 = CAL_CacheSprite\r
1569 =\r
1570 = Generate shifts and set up sprite structure for a given sprite\r
1571 =\r
1572 ======================\r
1573 */\r
1574 /*++++\r
1575 void CAL_CacheSprite (int chunk, byte far *compressed, global_game_variables_t *gvar)\r
1576 {\r
1577         int i;\r
1578         unsigned shiftstarts[5];\r
1579         unsigned smallplane,bigplane,expanded;\r
1580         spritetabletype far *spr;\r
1581         spritetype _seg *dest;\r
1582 \r
1583 #if 0\r
1584 //GRMODE == CGAGR\r
1585 //\r
1586 // CGA has no pel panning, so shifts are never needed\r
1587 //\r
1588         spr = &gvar->video.spritetable[chunk-STARTSPRITES];\r
1589         smallplane = spr->width*spr->height;\r
1590         MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);\r
1591         if (mmerror)\r
1592                 return;\r
1593         dest = (spritetype _seg *)grsegs[chunk];\r
1594         dest->sourceoffset[0] = MAXSHIFTS*6;    // start data after 3 unsigned tables\r
1595         dest->planesize[0] = smallplane;\r
1596         dest->width[0] = spr->width;\r
1597 \r
1598 //\r
1599 // expand the unshifted shape\r
1600 //\r
1601         CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,gvar->ca.grhuffman);\r
1602 \r
1603 #endif\r
1604 \r
1605 \r
1606 //#if GRMODE == EGAGR\r
1607 \r
1608 //\r
1609 // calculate sizes\r
1610 //\r
1611         spr = &gvar->video.spritetable[chunk-STARTSPRITES];\r
1612         smallplane = spr->width*spr->height;\r
1613         bigplane = (spr->width+1)*spr->height;\r
1614 \r
1615         shiftstarts[0] = MAXSHIFTS*6;   // start data after 3 unsigned tables\r
1616         shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite\r
1617         shiftstarts[2] = shiftstarts[1] + bigplane*5;\r
1618         shiftstarts[3] = shiftstarts[2] + bigplane*5;\r
1619         shiftstarts[4] = shiftstarts[3] + bigplane*5;   // nothing ever put here\r
1620 \r
1621         expanded = shiftstarts[spr->shifts];\r
1622         MM_GetPtr (MEMPTRCONV gvar->ca.grsegs[chunk],expanded, gvar);\r
1623         if (gvar->mm.mmerror)\r
1624                 return;\r
1625         dest = (spritetype _seg *)gvar->ca.grsegs[chunk];\r
1626 \r
1627 //\r
1628 // expand the unshifted shape\r
1629 //\r
1630         CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,gvar->ca.grhuffman);\r
1631 \r
1632 //\r
1633 // make the shifts!\r
1634 //\r
1635         switch (spr->shifts)\r
1636         {\r
1637         case    1:\r
1638                 for (i=0;i<4;i++)\r
1639                 {\r
1640                         dest->sourceoffset[i] = shiftstarts[0];\r
1641                         dest->planesize[i] = smallplane;\r
1642                         dest->width[i] = spr->width;\r
1643                 }\r
1644                 break;\r
1645 \r
1646         case    2:\r
1647                 for (i=0;i<2;i++)\r
1648                 {\r
1649                         dest->sourceoffset[i] = shiftstarts[0];\r
1650                         dest->planesize[i] = smallplane;\r
1651                         dest->width[i] = spr->width;\r
1652                 }\r
1653                 for (i=2;i<4;i++)\r
1654                 {\r
1655                         dest->sourceoffset[i] = shiftstarts[1];\r
1656                         dest->planesize[i] = bigplane;\r
1657                         dest->width[i] = spr->width+1;\r
1658                 }\r
1659                 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],\r
1660                         dest->sourceoffset[2],spr->width,spr->height,4,true,gvar);\r
1661                 break;\r
1662 \r
1663         case    4:\r
1664                 dest->sourceoffset[0] = shiftstarts[0];\r
1665                 dest->planesize[0] = smallplane;\r
1666                 dest->width[0] = spr->width;\r
1667 \r
1668                 dest->sourceoffset[1] = shiftstarts[1];\r
1669                 dest->planesize[1] = bigplane;\r
1670                 dest->width[1] = spr->width+1;\r
1671                 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],\r
1672                         dest->sourceoffset[1],spr->width,spr->height,2,true,gvar);\r
1673 \r
1674                 dest->sourceoffset[2] = shiftstarts[2];\r
1675                 dest->planesize[2] = bigplane;\r
1676                 dest->width[2] = spr->width+1;\r
1677                 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],\r
1678                         dest->sourceoffset[2],spr->width,spr->height,4,true,gvar);\r
1679 \r
1680                 dest->sourceoffset[3] = shiftstarts[3];\r
1681                 dest->planesize[3] = bigplane;\r
1682                 dest->width[3] = spr->width+1;\r
1683                 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],\r
1684                         dest->sourceoffset[3],spr->width,spr->height,6,true,gvar);\r
1685 \r
1686                 break;\r
1687 \r
1688         default:\r
1689                 Quit (gvar, "CAL_CacheSprite: Bad shifts number!");\r
1690         }\r
1691 \r
1692 //#endif\r
1693 }*/\r
1694 \r
1695 //===========================================================================\r
1696 \r
1697 \r
1698 /*\r
1699 ======================\r
1700 =\r
1701 = CAL_ExpandGrChunk\r
1702 =\r
1703 = Does whatever is needed with a pointer to a compressed chunk\r
1704 =\r
1705 ======================\r
1706 */\r
1707 /*++++\r
1708 void CAL_ExpandGrChunk (int chunk, byte far *source)\r
1709 {\r
1710         long    expanded;\r
1711 \r
1712 \r
1713         if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)\r
1714         {\r
1715         //\r
1716         // expanded sizes of tile8/16/32 are implicit\r
1717         //\r
1718 \r
1719 #if GRMODE == EGAGR\r
1720 #define BLOCK           32\r
1721 #define MASKBLOCK       40\r
1722 #endif\r
1723 \r
1724 #if GRMODE == CGAGR\r
1725 #define BLOCK           16\r
1726 #define MASKBLOCK       32\r
1727 #endif\r
1728 \r
1729                 if (chunk<STARTTILE8M)                  // tile 8s are all in one chunk!\r
1730                         expanded = BLOCK*NUMTILE8;\r
1731                 else if (chunk<STARTTILE16)\r
1732                         expanded = MASKBLOCK*NUMTILE8M;\r
1733                 else if (chunk<STARTTILE16M)    // all other tiles are one/chunk\r
1734                         expanded = BLOCK*4;\r
1735                 else if (chunk<STARTTILE32)\r
1736                         expanded = MASKBLOCK*4;\r
1737                 else if (chunk<STARTTILE32M)\r
1738                         expanded = BLOCK*16;\r
1739                 else\r
1740                         expanded = MASKBLOCK*16;\r
1741         }\r
1742         else\r
1743         {\r
1744         //\r
1745         // everything else has an explicit size longword\r
1746         //\r
1747                 expanded = *(long far *)source;\r
1748                 source += 4;                    // skip over length\r
1749         }\r
1750 \r
1751 //\r
1752 // allocate final space, decompress it, and free bigbuffer\r
1753 // Sprites need to have shifts made and various other junk\r
1754 //\r
1755         if (chunk>=STARTSPRITES && chunk< STARTTILE8)\r
1756                 CAL_CacheSprite(chunk,source);\r
1757         else\r
1758         {\r
1759                 MM_GetPtr (&grsegs[chunk],expanded);\r
1760                 if (mmerror)\r
1761                         return;\r
1762                 CAL_HuffExpand (source,grsegs[chunk],expanded,gvar->ca.grhuffman);\r
1763         }\r
1764 }\r
1765 */\r
1766 \r
1767 /*\r
1768 ======================\r
1769 =\r
1770 = CAL_ReadGrChunk\r
1771 =\r
1772 = Gets a chunk off disk, optimizing reads to general buffer\r
1773 =\r
1774 ======================\r
1775 */\r
1776 /*++++\r
1777 void CAL_ReadGrChunk (int chunk)\r
1778 {\r
1779         long    pos,compressed;\r
1780         memptr  bigbufferseg;\r
1781         byte    far *source;\r
1782         int             next;\r
1783 \r
1784 //\r
1785 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate\r
1786 // a larger buffer\r
1787 //\r
1788         pos = GRFILEPOS(chunk,gvar);\r
1789         if (pos<0)                                                      // $FFFFFFFF start is a sparse tile\r
1790           return;\r
1791 \r
1792         next = chunk +1;\r
1793         while (GRFILEPOS(next,gvar) == -1)              // skip past any sparse tiles\r
1794                 next++;\r
1795 \r
1796         compressed = GRFILEPOS(next,gvar)-pos;\r
1797 \r
1798         lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
1799 \r
1800         if (compressed<=BUFFERSIZE)\r
1801         {\r
1802                 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);\r
1803                 source = bufferseg;\r
1804         }\r
1805         else\r
1806         {\r
1807                 MM_GetPtr(&bigbufferseg,compressed);\r
1808                 if (mmerror)\r
1809                         return;\r
1810                 MM_SetLock (&bigbufferseg,true);\r
1811                 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);\r
1812                 source = bigbufferseg;\r
1813         }\r
1814 \r
1815         CAL_ExpandGrChunk (chunk,source);\r
1816 \r
1817         if (compressed>BUFFERSIZE)\r
1818                 MM_FreePtr(&bigbufferseg);\r
1819 }\r
1820 */\r
1821 /*\r
1822 ======================\r
1823 =\r
1824 = CA_CacheGrChunk\r
1825 =\r
1826 = Makes sure a given chunk is in memory, loadiing it if needed\r
1827 =\r
1828 ======================\r
1829 */\r
1830 /*++++\r
1831 void CA_CacheGrChunk (int chunk)\r
1832 {\r
1833         long    pos,compressed;\r
1834         memptr  bigbufferseg;\r
1835         byte    far *source;\r
1836         int             next;\r
1837 \r
1838         gvar->ca.grneeded[chunk] |= ca_levelbit;                // make sure it doesn't get removed\r
1839         if (grsegs[chunk])\r
1840         {\r
1841                 MM_SetPurge (&grsegs[chunk],0);\r
1842                 return;                                                 // allready in memory\r
1843         }\r
1844 \r
1845 // MDM begin - (GAMERS EDGE)\r
1846 //\r
1847         if (!FindFile("EGAGRAPH.16",NULL,2))\r
1848                 Quit (gvar, "CA_CacheGrChunk(): Can't find graphics files.");\r
1849 //\r
1850 // MDM end\r
1851 \r
1852 //\r
1853 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate\r
1854 // a larger buffer\r
1855 //\r
1856         pos = GRFILEPOS(chunk,gvar);\r
1857         if (pos<0)                                                      // $FFFFFFFF start is a sparse tile\r
1858           return;\r
1859 \r
1860         next = chunk +1;\r
1861         while (GRFILEPOS(next) == -1)           // skip past any sparse tiles\r
1862                 next++;\r
1863 \r
1864         compressed = GRFILEPOS(next,gvar)-pos;\r
1865 \r
1866         lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
1867 \r
1868         if (compressed<=BUFFERSIZE)\r
1869         {\r
1870                 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);\r
1871                 source = bufferseg;\r
1872         }\r
1873         else\r
1874         {\r
1875                 MM_GetPtr(&bigbufferseg,compressed);\r
1876                 MM_SetLock (&bigbufferseg,true);\r
1877                 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);\r
1878                 source = bigbufferseg;\r
1879         }\r
1880 \r
1881         CAL_ExpandGrChunk (chunk,source);\r
1882 \r
1883         if (compressed>BUFFERSIZE)\r
1884                 MM_FreePtr(&bigbufferseg);\r
1885 }\r
1886 */\r
1887 \r
1888 \r
1889 //==========================================================================\r
1890 \r
1891 /*\r
1892 ======================\r
1893 =\r
1894 = CA_CacheMap\r
1895 =\r
1896 ======================\r
1897 */\r
1898 \r
1899 void CA_CacheMap (global_game_variables_t *gvar)\r
1900 {\r
1901         long    pos,compressed;\r
1902         int             plane;\r
1903         memptr  *dest,bigbufferseg;\r
1904         unsigned        size;\r
1905         unsigned        far     *source;\r
1906 #ifdef MAPHEADERLINKED\r
1907         memptr  buffer2seg;\r
1908         long    expanded;\r
1909 #endif\r
1910 \r
1911 \r
1912 //\r
1913 // free up memory from last map\r
1914 //\r
1915         if (gvar->ca.mapon>-1 && gvar->ca.mapheaderseg[gvar->ca.mapon])\r
1916                 MM_SetPurge ((MEMPTRCONV gvar->ca.mapheaderseg[(gvar->ca.mapon)]), 3, gvar);\r
1917         for (plane=0;plane<MAPPLANES;plane++)\r
1918                 if (gvar->ca.mapsegs[plane])\r
1919                         MM_FreePtr (MEMPTRCONV gvar->ca.mapsegs[plane], gvar);\r
1920 \r
1921         gvar->ca.mapon = gvar->ca.mapnum;\r
1922 \r
1923 \r
1924 //\r
1925 // load map header\r
1926 // The header will be cached if it is still around\r
1927 //\r
1928         if (!gvar->ca.mapheaderseg[gvar->ca.mapnum])\r
1929         {\r
1930                 pos = ((mapfiletype     _seg *)gvar->ca.tinf)->headeroffsets[gvar->ca.mapnum];\r
1931                 if (pos<0)                                              // $FFFFFFFF start is a sparse map\r
1932                         Quit (gvar, "CA_CacheMap: Tried to load a non existent map!");\r
1933 \r
1934                 MM_GetPtr(MEMPTRCONV gvar->ca.mapheaderseg[gvar->ca.mapnum],sizeof(maptype), gvar);\r
1935                 lseek(gvar->ca.file.maphandle,pos,SEEK_SET);\r
1936 #ifdef MAPHEADERLINKED\r
1937 //#if BUFFERSIZE < sizeof(maptype)\r
1938 //The general buffer size is too small!\r
1939 //#endif\r
1940                 //\r
1941                 // load in, then unhuffman to the destination\r
1942                 //\r
1943                 CA_FarRead (gvar->ca.file.maphandle,gvar->mm.bufferseg,((mapfiletype    _seg *)gvar->ca.tinf)->headersize[gvar->ca.mapnum], gvar);\r
1944                 CAL_HuffExpand ((byte huge *)bufferseg,\r
1945                         (byte huge *)gvar->ca.mapheaderseg[gvar->ca.mapnum],sizeof(maptype),maphuffman, gvar);\r
1946 #else\r
1947                 CA_FarRead (gvar->ca.file.maphandle,(memptr)gvar->ca.mapheaderseg[gvar->ca.mapnum],sizeof(maptype), gvar);\r
1948 #endif\r
1949         }\r
1950         else\r
1951                 MM_SetPurge (MEMPTRCONV gvar->ca.mapheaderseg[gvar->ca.mapnum], 0, gvar);\r
1952 \r
1953 //\r
1954 // load the planes in\r
1955 // If a plane's pointer still exists it will be overwritten (levels are\r
1956 // allways reloaded, never cached)\r
1957 //\r
1958 \r
1959         size = gvar->ca.mapheaderseg[gvar->ca.mapnum]->width * gvar->ca.mapheaderseg[gvar->ca.mapnum]->height * 2;\r
1960 \r
1961         for (plane = 0; plane<MAPPLANES; plane++)\r
1962         {\r
1963                 pos = gvar->ca.mapheaderseg[gvar->ca.mapnum]->planestart[plane];\r
1964                 compressed = gvar->ca.mapheaderseg[gvar->ca.mapnum]->planelength[plane];\r
1965 \r
1966                 if (!compressed)\r
1967                         continue;               // the plane is not used in this game\r
1968 \r
1969                 dest = MEMPTRCONV gvar->ca.mapsegs[plane];\r
1970                 MM_GetPtr(dest,size, gvar);\r
1971 \r
1972                 lseek(gvar->ca.file.maphandle,pos,SEEK_SET);\r
1973                 if (compressed<=BUFFERSIZE)\r
1974                         source = gvar->mm.bufferseg;\r
1975                 else\r
1976                 {\r
1977                         MM_GetPtr(&bigbufferseg,compressed, gvar);\r
1978                         MM_SetLock (&bigbufferseg,true, gvar);\r
1979                         source = bigbufferseg;\r
1980                 }\r
1981 \r
1982                 CA_FarRead(gvar->ca.file.maphandle,(byte far *)source,compressed, gvar);\r
1983 #ifdef MAPHEADERLINKED\r
1984                 //\r
1985                 // unhuffman, then unRLEW\r
1986                 // The huffman'd chunk has a two byte expanded length first\r
1987                 // The resulting RLEW chunk also does, even though it's not really\r
1988                 // needed\r
1989                 //\r
1990                 expanded = *source;\r
1991                 source++;\r
1992                 MM_GetPtr (&buffer2seg,expanded, gvar);\r
1993                 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);\r
1994                 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,\r
1995                 ((mapfiletype _seg *)tinf)->RLEWtag);\r
1996                 MM_FreePtr (&buffer2seg);\r
1997 \r
1998 #else\r
1999                 //\r
2000                 // unRLEW, skipping expanded length\r
2001                 //\r
2002                 CA_RLEWexpand (source+1, *dest,size,\r
2003                 ((mapfiletype _seg *)gvar->ca.tinf)->RLEWtag);\r
2004 #endif\r
2005 \r
2006                 if (compressed>BUFFERSIZE)\r
2007                         MM_FreePtr(&bigbufferseg, gvar);\r
2008         }\r
2009 }\r
2010 \r
2011 //===========================================================================\r
2012 \r
2013 /*\r
2014 ======================\r
2015 =\r
2016 = CA_UpLevel\r
2017 =\r
2018 = Goes up a bit level in the needed lists and clears it out.\r
2019 = Everything is made purgable\r
2020 =\r
2021 ======================\r
2022 */\r
2023 \r
2024 void CA_UpLevel (global_game_variables_t *gvar)\r
2025 {\r
2026         if (gvar->ca.ca_levelnum==7)\r
2027                 printf("CA_UpLevel: Up past level 7!");\r
2028 \r
2029         gvar->ca.ca_levelbit<<=1;\r
2030         gvar->ca.ca_levelnum++;\r
2031 }\r
2032 \r
2033 //===========================================================================\r
2034 \r
2035 /*\r
2036 ======================\r
2037 =\r
2038 = CA_DownLevel\r
2039 =\r
2040 = Goes down a bit level in the needed lists and recaches\r
2041 = everything from the lower level\r
2042 =\r
2043 ======================\r
2044 */\r
2045 \r
2046 void CA_DownLevel (global_game_variables_t *gvar)\r
2047 {\r
2048         if (!gvar->ca.ca_levelnum)\r
2049                 printf("CA_DownLevel: Down past level 0!");\r
2050         gvar->ca.ca_levelbit>>=1;\r
2051         gvar->ca.ca_levelnum--;\r
2052         ////++++++++++++++++++++++++++++++++++++++++++CA_CacheMarks(NULL);\r
2053 }\r
2054 \r
2055 //===========================================================================\r
2056 \r
2057 /*\r
2058 ======================\r
2059 =\r
2060 = CA_ClearMarks\r
2061 =\r
2062 = Clears out all the marks at the current level\r
2063 =\r
2064 ======================\r
2065 */\r
2066 \r
2067 void CA_ClearMarks (global_game_variables_t *gvar)\r
2068 {\r
2069         int i;\r
2070 \r
2071         for (i=0;i<NUMCHUNKS;i++)\r
2072                 gvar->ca.grneeded[i]&=~gvar->ca.ca_levelbit;\r
2073 }\r
2074 \r
2075 //===========================================================================\r
2076 \r
2077 /*\r
2078 ======================\r
2079 =\r
2080 = CA_ClearAllMarks\r
2081 =\r
2082 = Clears out all the marks on all the levels\r
2083 =\r
2084 ======================\r
2085 */\r
2086 \r
2087 void CA_ClearAllMarks (global_game_variables_t *gvar)\r
2088 {\r
2089         _fmemset (gvar->ca.grneeded,0,sizeof(gvar->ca.grneeded));\r
2090         gvar->ca.ca_levelbit = 1;\r
2091         gvar->ca.ca_levelnum = 0;\r
2092 }\r
2093 \r
2094 //===========================================================================\r
2095 \r
2096 /*\r
2097 ======================\r
2098 =\r
2099 = CA_FreeGraphics\r
2100 =\r
2101 ======================\r
2102 */\r
2103 \r
2104 void CA_SetGrPurge (global_game_variables_t *gvar)\r
2105 {\r
2106         int i;\r
2107 \r
2108 //\r
2109 // free graphics\r
2110 //\r
2111         CA_ClearMarks (gvar);\r
2112 \r
2113         for (i=0;i<NUMCHUNKS;i++)\r
2114                 if (gvar->ca.grsegs[i])\r
2115                         MM_SetPurge (gvar->ca.grsegs[i],3, gvar);\r
2116 }\r
2117 \r
2118 \r
2119 /*\r
2120 ======================\r
2121 =\r
2122 = CA_SetAllPurge\r
2123 =\r
2124 = Make everything possible purgable\r
2125 =\r
2126 ======================\r
2127 */\r
2128 \r
2129 void CA_SetAllPurge (global_game_variables_t *gvar)\r
2130 {\r
2131         int i;\r
2132 \r
2133         CA_ClearMarks (gvar);\r
2134 \r
2135 //\r
2136 // free cursor sprite and background save\r
2137 //\r
2138         //____VW_FreeCursor ();\r
2139 \r
2140 //\r
2141 // free map headers and map planes\r
2142 //\r
2143         for (i=0;i<NUMMAPS;i++)\r
2144                 if (gvar->ca.mapheaderseg[i])\r
2145                         MM_SetPurge (MEMPTRCONV gvar->ca.mapheaderseg[i],3, gvar);\r
2146 \r
2147         for (i=0;i<3;i++)\r
2148                 if (gvar->ca.mapsegs[i])\r
2149                         MM_FreePtr (MEMPTRCONV gvar->ca.mapsegs[i], gvar);\r
2150 \r
2151 //\r
2152 // free sounds\r
2153 //\r
2154         for (i=0;i<NUMSNDCHUNKS;i++)\r
2155                 if (gvar->ca.audiosegs[i])\r
2156                         MM_SetPurge (MEMPTRCONV gvar->ca.audiosegs[i],3, gvar);\r
2157 \r
2158 //\r
2159 // free graphics\r
2160 //\r
2161         CA_SetGrPurge (gvar);\r
2162 }\r
2163 \r
2164 \r
2165 //===========================================================================\r
2166 \r
2167 \r
2168 /*\r
2169 ======================\r
2170 =\r
2171 = CAL_DialogDraw\r
2172 =\r
2173 ======================\r
2174 */\r
2175 /*\r
2176 #define NUMBARS (17l*8)\r
2177 #define BARSTEP 8\r
2178 \r
2179 unsigned        thx,thy,lastx;\r
2180 long            barx,barstep;\r
2181 \r
2182 void    CAL_DialogDraw (char *title,unsigned numcache)\r
2183 {\r
2184         unsigned        homex,homey,x;\r
2185 \r
2186         barstep = (NUMBARS<<16)/numcache;\r
2187 \r
2188 //\r
2189 // draw dialog window (masked tiles 12 - 20 are window borders)\r
2190 //\r
2191         US_CenterWindow (20,8);\r
2192         homex = PrintX;\r
2193         homey = PrintY;\r
2194 \r
2195         US_CPrint ("Loading");\r
2196         fontcolor = F_SECONDCOLOR;\r
2197         US_CPrint (title);\r
2198         fontcolor = F_BLACK;\r
2199 \r
2200 //\r
2201 // draw thermometer bar\r
2202 //\r
2203         thx = homex + 8;\r
2204         thy = homey + 32;\r
2205         VWB_DrawTile8(thx,thy,0);               // CAT3D numbers\r
2206         VWB_DrawTile8(thx,thy+8,3);\r
2207         VWB_DrawTile8(thx,thy+16,6);\r
2208         VWB_DrawTile8(thx+17*8,thy,2);\r
2209         VWB_DrawTile8(thx+17*8,thy+8,5);\r
2210         VWB_DrawTile8(thx+17*8,thy+16,8);\r
2211         for (x=thx+8;x<thx+17*8;x+=8)\r
2212         {\r
2213                 VWB_DrawTile8(x,thy,1);\r
2214                 VWB_DrawTile8(x,thy+8,4);\r
2215                 VWB_DrawTile8(x,thy+16,7);\r
2216         }\r
2217 \r
2218         thx += 4;               // first line location\r
2219         thy += 5;\r
2220         barx = (long)thx<<16;\r
2221         lastx = thx;\r
2222 \r
2223         VW_UpdateScreen();\r
2224 }\r
2225 */\r
2226 \r
2227 /*\r
2228 ======================\r
2229 =\r
2230 = CAL_DialogUpdate\r
2231 =\r
2232 ======================\r
2233 */\r
2234 /*\r
2235 void    CAL_DialogUpdate (void)\r
2236 {\r
2237         unsigned        x,xh;\r
2238 \r
2239         barx+=barstep;\r
2240         xh = barx>>16;\r
2241         if (xh - lastx > BARSTEP)\r
2242         {\r
2243                 for (x=lastx;x<=xh;x++)\r
2244 #if GRMODE == EGAGR\r
2245                         VWB_Vlin (thy,thy+13,x,14);\r
2246 #endif\r
2247 #if GRMODE == CGAGR\r
2248                         VWB_Vlin (thy,thy+13,x,SECONDCOLOR);\r
2249 #endif\r
2250                 lastx = xh;\r
2251                 VW_UpdateScreen();\r
2252         }\r
2253 }*/\r
2254 \r
2255 /*\r
2256 ======================\r
2257 =\r
2258 = CAL_DialogFinish\r
2259 =\r
2260 ======================\r
2261 */\r
2262 /*\r
2263 void    CAL_DialogFinish (void)\r
2264 {\r
2265         unsigned        x,xh;\r
2266 \r
2267         xh = thx + NUMBARS;\r
2268         for (x=lastx;x<=xh;x++)\r
2269 #if GRMODE == EGAGR\r
2270                 VWB_Vlin (thy,thy+13,x,14);\r
2271 #endif\r
2272 #if GRMODE == CGAGR\r
2273                 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);\r
2274 #endif\r
2275         VW_UpdateScreen();\r
2276 \r
2277 }*/\r
2278 \r
2279 //===========================================================================\r
2280 \r
2281 /*\r
2282 ======================\r
2283 =\r
2284 = CA_CacheMarks\r
2285 =\r
2286 ======================\r
2287 */\r
2288 #define MAXEMPTYREAD    1024\r
2289 /*++++ segments\r
2290 void CAL_CacheMarks (char *title, global_game_variables_t *gvar)\r
2291 {\r
2292         boolean dialog;\r
2293         int     i,next,numcache;\r
2294         long    pos,endpos,nextpos,nextendpos,compressed;\r
2295         long    bufferstart,bufferend;  // file position of general buffer\r
2296         byte    far *source;\r
2297         memptr  bigbufferseg;\r
2298 \r
2299         dialog = (title!=NULL);\r
2300 \r
2301         numcache = 0;\r
2302 //\r
2303 // go through and make everything not needed purgable\r
2304 //\r
2305         for (i=0;i<NUMCHUNKS;i++)\r
2306                 if (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit))//if (grneeded[i]&ca_levelbit)\r
2307                 {\r
2308                         if (gvar->ca.grsegs[i])                                 // its allready in memory, make\r
2309                                 MM_SetPurge(gvar->ca.grsegs[i],0,gvar); // sure it stays there!\r
2310                         else\r
2311                                 numcache++;\r
2312                 }\r
2313                 else\r
2314                 {\r
2315                         if (gvar->ca.grsegs[i])                                 // not needed, so make it purgeable\r
2316                                 MM_SetPurge(gvar->ca.grsegs[i],3,gvar);\r
2317                 }\r
2318 \r
2319         if (!numcache)                  // nothing to cache!\r
2320                 return;\r
2321 \r
2322 // MDM begin - (GAMERS EDGE)\r
2323 //\r
2324 //????  if (!FindFile("EGAGRAPH.16",NULL,2))\r
2325 //????          Quit (gvar, "CA_CacheMarks(): Can't find graphics files.");\r
2326 //\r
2327 // MDM end\r
2328 \r
2329         if (dialog)\r
2330         {\r
2331 #ifdef PROFILE\r
2332                 write(profilehandle,title,strlen(title));\r
2333                 write(profilehandle,"\n",1);\r
2334 #endif\r
2335                 if (drawcachebox)\r
2336                         drawcachebox(title,numcache);\r
2337         }\r
2338 \r
2339 //\r
2340 // go through and load in anything still needed\r
2341 //\r
2342         bufferstart = bufferend = 0;            // nothing good in buffer now\r
2343 \r
2344         for (i=0;i<NUMCHUNKS;i++)\r
2345                 if ( (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit)) && !gvar->ca.grsegs[i])\r
2346                 {\r
2347 //\r
2348 // update thermometer\r
2349 //\r
2350                         if (dialog && updatecachebox)\r
2351                                 updatecachebox ();\r
2352 \r
2353                         pos = GRFILEPOS(i,gvar);\r
2354                         if (pos<0)\r
2355                                 continue;\r
2356 \r
2357                         next = i +1;\r
2358                         while (GRFILEPOS(next) == -1)           // skip past any sparse tiles\r
2359                                 next++;\r
2360 \r
2361                         compressed = GRFILEPOS(next,gvar)-pos;\r
2362                         endpos = pos+compressed;\r
2363 \r
2364                         if (compressed<=BUFFERSIZE)\r
2365                         {\r
2366                                 if (bufferstart<=pos\r
2367                                 && bufferend>= endpos)\r
2368                                 {\r
2369                                 // data is allready in buffer\r
2370                                         source = (byte _seg *)bufferseg+(pos-bufferstart);\r
2371                                 }\r
2372                                 else\r
2373                                 {\r
2374                                 // load buffer with a new block from disk\r
2375                                 // try to get as many of the needed blocks in as possible\r
2376                                         while ( next < NUMCHUNKS )\r
2377                                         {\r
2378                                                 while (next < NUMCHUNKS &&\r
2379                                                 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))\r
2380                                                         next++;\r
2381                                                 if (next == NUMCHUNKS)\r
2382                                                         continue;\r
2383 \r
2384                                                 nextpos = GRFILEPOS(next,gvar);\r
2385                                                 while (GRFILEPOS(++next,gvar) == -1)    // skip past any sparse tiles\r
2386                                                         ;\r
2387                                                 nextendpos = GRFILEPOS(next,gvar);\r
2388                                                 if (nextpos - endpos <= MAXEMPTYREAD\r
2389                                                 && nextendpos-pos <= BUFFERSIZE)\r
2390                                                         endpos = nextendpos;\r
2391                                                 else\r
2392                                                         next = NUMCHUNKS;                       // read pos to posend\r
2393                                         }\r
2394 \r
2395                                         lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
2396                                         CA_FarRead(gvar->ca.file.grhandle,(gvar->mm.bufferseg),endpos-pos,gvar);\r
2397                                         bufferstart = pos;\r
2398                                         bufferend = endpos;\r
2399                                         source = bufferseg;\r
2400                                 }\r
2401                         }\r
2402                         else\r
2403                         {\r
2404                         // big chunk, allocate temporary buffer\r
2405                                 MM_GetPtr(&bigbufferseg,compressed,gvar);\r
2406                                 if (mmerror)\r
2407                                         return;\r
2408                                 MM_SetLock (&bigbufferseg,true);\r
2409                                 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
2410                                 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed,gvar);\r
2411                                 source = bigbufferseg;\r
2412                         }\r
2413 \r
2414                         CAL_ExpandGrChunk (i,source);\r
2415                         if (mmerror)\r
2416                                 return;\r
2417 \r
2418                         if (compressed>BUFFERSIZE)\r
2419                                 MM_FreePtr(&bigbufferseg);\r
2420 \r
2421                 }\r
2422 \r
2423 //\r
2424 // finish up any thermometer remnants\r
2425 //\r
2426                 if (dialog && finishcachebox)\r
2427                         finishcachebox();\r
2428 }//*/\r
2429 \r
2430 void CA_CannotOpen(char *string, global_game_variables_t *gvar)\r
2431 {\r
2432  char str[30];\r
2433 \r
2434  strcpy(str,"Can't open ");\r
2435  strcat(str,string);\r
2436  strcat(str,"!\n");\r
2437  Quit (gvar, str);\r
2438 }\r