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            c hunkcomplen,c hunkexplen;\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 long GRFILEPOS(int c, global_game_variables_t *gvar)\r
 142 {\r
 143         long value;\r
 144         int     offset;\r
 145 \r
 146         offset = c*3;\r
 147 \r
 148         value = *(long 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 #endif\r
 161 \r
 162 /*\r
 163 =============================================================================\r
 164 \r
 165                                            LOW LEVEL ROUTINES\r
 166 \r
 167 =============================================================================\r
 168 */\r
 169 \r
 170 /*\r
 171 ============================\r
 172 =\r
 173 = CA_OpenDebug / CA_CloseDebug\r
 174 =\r
 175 = Opens a binary file with the handle "debughandle"\r
 176 =\r
 177 ============================\r
 178 */\r
 179 void CA_OpenDebug(global_game_variables_t *gvar)\r
 180 {\r
 181 #ifdef __BORLANDC__\r
 182         unlink("debug.16b");\r
 183         gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);\r
 184 #endif\r
 185 #ifdef __WATCOMC__\r
 186         unlink("debug.16w");\r
 187         gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);\r
 188 #endif\r
 189 }\r
 190 \r
 191 void CA_CloseDebug(global_game_variables_t *gvar)\r
 192 {\r
 193         close(gvar->handle.debughandle);\r
 194 }\r
 195 \r
 196 \r
 197 \r
 198 /*\r
 199 ============================\r
 200 =\r
 201 = CAL_GetGrChunkLength\r
 202 =\r
 203 = Gets the length of an explicit length chunk (not tiles)\r
 204 = The file pointer is positioned so the compressed data can be read in next.\r
 205 =\r
 206 ============================\r
 207 */\r
 208 \r
 209 void CAL_GetGrChunkLength (int chunk,global_game_variables_t *gvar)\r
 210 {\r
 211         lseek(gvar->ca.file.grhandle,GRFILEPOS(chunk),SEEK_SET);\r
 212         read(gvar->ca.file.grhandle,&gvar->ca.chunkexplen,sizeof(gvar->ca.chunkexplen));\r
 213         gvar->ca.chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;\r
 214 }\r
 215 \r
 216 \r
 217 /*\r
 218 ==========================\r
 219 =\r
 220 = CA_FarRead\r
 221 =\r
 222 = Read from a file to a far pointer\r
 223 =\r
 224 ==========================\r
 225 */\r
 226 \r
 227 boolean CA_FarRead(int handle, byte far *dest, dword length, global_game_variables_t *gvar)\r
 228 {\r
 229         boolean flag=0;\r
 230         //dword fat=0;\r
 231         //word segm=0;\r
 232         if(gvar->pm.emm.EMSVer<0x40)\r
 233         if(length>0xfffflu)\r
 234         {\r
 235                 printf("File is a fat bakapee\n");\r
 236                 //segm=(length%0xfffflu)-1;\r
 237                 //fat=segm*0xfffflu;\r
 238                 //length-=fat;\r
 239                 printf("CA_FarRead doesn't support 64K reads yet!\n");\r
 240                 return 0;//TODO: EXPAND!!!\r
 241         }\r
 242 \r
 243         //if(!fat&&!segm)\r
 244         //{\r
 245         __asm {\r
 246                 push    ds\r
 247                 mov     bx,[handle]\r
 248                 mov     cx,[WORD PTR length]\r
 249                 mov     dx,[WORD PTR dest]\r
 250                 mov     ds,[WORD PTR dest+2]\r
 251                 mov     ah,0x3f                         // READ w/handle\r
 252                 int     21h\r
 253                 pop     ds\r
 254                 jnc     good\r
 255                 mov     errno,ax\r
 256                 mov     flag,0\r
 257                 jmp End\r
 258 #ifdef __BORLANDC__\r
 259         }\r
 260 #endif\r
 261 good:\r
 262 #ifdef __BORLANDC__\r
 263         __asm {\r
 264 #endif\r
 265                 cmp     ax,[WORD PTR length]\r
 266                 je      done\r
 267 //              errno = EINVFMT;                        // user manager knows this is bad read\r
 268                 mov     flag,0\r
 269                 jmp End\r
 270 #ifdef __BORLANDC__\r
 271         }\r
 272 #endif\r
 273 done:\r
 274 #ifdef __BORLANDC__\r
 275         __asm {\r
 276 #endif\r
 277                 mov     flag,1\r
 278 #ifdef __BORLANDC__\r
 279         }\r
 280 #endif\r
 281 End:\r
 282 #ifdef __WATCOMC__\r
 283         }\r
 284 #endif\r
 285         return flag;\r
 286 }\r
 287 \r
 288 \r
 289 /*\r
 290 ==========================\r
 291 =\r
 292 = CA_SegWrite\r
 293 =\r
 294 = Write from a file to a far pointer\r
 295 =\r
 296 ==========================\r
 297 */\r
 298 \r
 299 boolean CA_FarWrite(int handle, byte far *source, dword length, global_game_variables_t *gvar)\r
 300 {\r
 301         boolean flag=0;\r
 302         //dword fat=0;\r
 303         //word segm=0;\r
 304         if(gvar->pm.emm.EMSVer<0x40)\r
 305         if(length>0xfffflu)\r
 306         {\r
 307                 printf("File is a fat bakapee\n");\r
 308                 //segm=(length%0xfffflu)-1;\r
 309                 //fat=segm*0xfffflu;\r
 310                 //length-=fat;\r
 311                 printf("CA_FarWrite doesn't support 64K reads yet!\n");\r
 312                 return 0;\r
 313         }\r
 314 \r
 315         //if(!fat&&!segm)\r
 316         //{\r
 317         __asm {\r
 318                 push    ds\r
 319                 mov     bx,[handle]\r
 320                 mov     cx,[WORD PTR length]\r
 321                 mov     dx,[WORD PTR source]\r
 322                 mov     ds,[WORD PTR source+2]\r
 323                 mov     ah,0x40                 // WRITE w/handle\r
 324                 int     21h\r
 325                 pop     ds\r
 326                 jnc     good\r
 327                 mov     errno,ax\r
 328                 mov flag,0\r
 329                 jmp End\r
 330 #ifdef __BORLANDC__\r
 331         }\r
 332 #endif\r
 333 good:\r
 334 #ifdef __BORLANDC__\r
 335         __asm {\r
 336 #endif\r
 337                 cmp     ax,[WORD PTR length]\r
 338                 je      done\r
 339 //              errno = ENOMEM;                         // user manager knows this is bad write\r
 340                 mov     flag,0\r
 341                 jmp End\r
 342 #ifdef __BORLANDC__\r
 343         }\r
 344 #endif\r
 345 done:\r
 346 #ifdef __BORLANDC__\r
 347         __asm {\r
 348 #endif\r
 349                 mov     flag,1\r
 350 #ifdef __BORLANDC__\r
 351         }\r
 352 #endif\r
 353 End:\r
 354 #ifdef __WATCOMC__\r
 355         }\r
 356 #endif\r
 357         return flag;\r
 358 }\r
 359 \r
 360 \r
 361 /*\r
 362 ==========================\r
 363 =\r
 364 = CA_ReadFile\r
 365 =\r
 366 = Reads a file into an allready allocated buffer\r
 367 =\r
 368 ==========================\r
 369 */\r
 370 \r
 371 boolean CA_ReadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)\r
 372 {\r
 373         int handle;\r
 374         sdword size;\r
 375         //long size;\r
 376 \r
 377         if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
 378                 return false;\r
 379 \r
 380         size = filelength(handle);\r
 381 #ifdef __DEBUG_CA__\r
 382         if(dbg_debugca>0){\r
 383                 printf("===============================================================================\n");\r
 384                 printf("                CA_ReadFile\n");\r
 385                 printf("===============================================================================\n");\r
 386                 //%04x\r
 387                 printf("        ptr=%Fp\n", ptr);\r
 388                 printf("        *ptr=%Fp\n", *ptr);\r
 389                 printf("        &ptr=%Fp\n", &ptr);\r
 390         }\r
 391 #endif\r
 392         if(!CA_FarRead(handle,*ptr,size, gvar))\r
 393         {\r
 394                 close(handle);\r
 395                 return false;\r
 396         }\r
 397         close(handle);\r
 398         return true;\r
 399 }\r
 400 \r
 401 \r
 402 /*\r
 403 ==========================\r
 404 =\r
 405 = CA_WriteFile\r
 406 =\r
 407 = Writes a file from a memory buffer\r
 408 =\r
 409 ==========================\r
 410 */\r
 411 \r
 412 boolean CA_WriteFile (char *filename, void far *ptr, long length, global_game_variables_t *gvar)\r
 413 {\r
 414         int handle;\r
 415         //sdword size;\r
 416         //long size;\r
 417 \r
 418         handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,\r
 419                                 S_IREAD | S_IWRITE | S_IFREG);\r
 420 \r
 421         if (handle == -1)\r
 422                 return false;\r
 423 \r
 424         if (!CA_FarWrite (handle,ptr,length, gvar))\r
 425         {\r
 426                 close(handle);\r
 427                 return false;\r
 428         }\r
 429         close(handle);\r
 430         return true;\r
 431 }\r
 432 \r
 433 \r
 434 \r
 435 /*\r
 436 ==========================\r
 437 =\r
 438 = CA_LoadFile\r
 439 =\r
 440 = Allocate space for and load a file\r
 441 =\r
 442 ==========================\r
 443 */\r
 444 \r
 445 boolean CA_LoadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)\r
 446 {\r
 447         int handle;\r
 448         sdword size;\r
 449         //long size;\r
 450 \r
 451         if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
 452                 return false;\r
 453 \r
 454         size = filelength(handle);\r
 455 #ifdef __DEBUG_CA__\r
 456         if(dbg_debugca>0){\r
 457                 printf("===============================================================================\n");\r
 458                 printf("                CA_LoadFile\n");\r
 459                 printf("===============================================================================\n");\r
 460                 //%04x\r
 461                 printf("        ptr=%Fp\n", ptr);\r
 462                 printf("        *ptr=%Fp\n", *ptr);\r
 463                 printf("        &ptr=%Fp\n", &ptr);\r
 464         }\r
 465 #endif\r
 466         MM_GetPtr(ptr,size, gvar);\r
 467 #ifdef __DEBUG_CA__\r
 468         if(dbg_debugca>0){\r
 469                 //%04x\r
 470                 printf("---------------------------------------\n");\r
 471                 printf("        ptr=%Fp\n", ptr);\r
 472                 printf("        *ptr=%Fp\n", *ptr);\r
 473                 printf("        &ptr=%Fp\n", &ptr);\r
 474                 printf("-------------------------------------------------------------------------------\n");\r
 475         }\r
 476 #endif\r
 477         if(!CA_FarRead(handle,*ptr,size, gvar))\r
 478         {\r
 479                 close(handle);\r
 480                 return false;\r
 481         }\r
 482         close(handle);\r
 483         return true;\r
 484 }\r
 485 \r
 486 /*\r
 487 ============================================================================\r
 488 \r
 489                 COMPRESSION routines, see JHUFF.C for more\r
 490 \r
 491 ============================================================================\r
 492 */\r
 493 \r
 494 \r
 495 \r
 496 /*\r
 497 ===============\r
 498 =\r
 499 = CAL_OptimizeNodes\r
 500 =\r
 501 = Goes through a huffman table and changes the 256-511 node numbers to the\r
 502 = actular address of the node.  Must be called before CAL_HuffExpand\r
 503 =\r
 504 ===============\r
 505 */\r
 506 \r
 507 void CAL_OptimizeNodes(huffnode *table)\r
 508 {\r
 509   huffnode *node;\r
 510   int i;\r
 511 \r
 512   node = table;\r
 513 \r
 514   for (i=0;i<255;i++)\r
 515   {\r
 516         if (node->bit0 >= 256)\r
 517           node->bit0 = (unsigned)(table+(node->bit0-256));\r
 518         if (node->bit1 >= 256)\r
 519           node->bit1 = (unsigned)(table+(node->bit1-256));\r
 520         node++;\r
 521   }\r
 522 }\r
 523 \r
 524 \r
 525 \r
 526 /*\r
 527 ======================\r
 528 =\r
 529 = CAL_HuffExpand\r
 530 =\r
 531 = Length is the length of the EXPANDED data\r
 532 =\r
 533 ======================\r
 534 */\r
 535 \r
 536 void CAL_HuffExpand (byte far *source, byte far *dest,\r
 537   long length,huffnode *hufftable)\r
 538 {\r
 539 //  unsigned bit,byte,node,code;\r
 540   unsigned sourceseg,sourceoff,destseg,destoff,endoff;\r
 541         huffnode *headptr;\r
 542 //  huffnode *nodeon;\r
 543 \r
 544         headptr = hufftable+254;        // head node is allways node 254\r
 545 \r
 546   source++;     // normalize\r
 547   source--;\r
 548   dest++;\r
 549   dest--;\r
 550 \r
 551   sourceseg = FP_SEG(source);\r
 552   sourceoff = FP_OFF(source);\r
 553   destseg = FP_SEG(dest);\r
 554   destoff = FP_OFF(dest);\r
 555   endoff = destoff+length;\r
 556 \r
 557 //\r
 558 // ds:si source\r
 559 // es:di dest\r
 560 // ss:bx node pointer\r
 561 //\r
 562 \r
 563         if (length <0xfff0)\r
 564         {\r
 565 \r
 566 //--------------------------\r
 567 // expand less than 64k of data\r
 568 //--------------------------\r
 569 \r
 570         __asm {\r
 571                 mov     bx,[word ptr headptr]\r
 572 \r
 573                 mov     si,[sourceoff]\r
 574                 mov     di,[destoff]\r
 575                 mov     es,[destseg]\r
 576                 mov     ds,[sourceseg]\r
 577                 mov     ax,[endoff]\r
 578 \r
 579                 mov     ch,[si]                         // load first byte\r
 580                 inc     si\r
 581                 mov     cl,1\r
 582 #ifdef __BORLANDC__\r
 583         }\r
 584 #endif\r
 585 expandshort:\r
 586 #ifdef __BORLANDC__\r
 587         __asm {\r
 588 #endif\r
 589                 test    ch,cl                   // bit set?\r
 590                 jnz     bit1short\r
 591                 mov     dx,[ss:bx]                      // take bit0 path from node\r
 592                 shl     cl,1                            // advance to next bit position\r
 593                 jc      newbyteshort\r
 594                 jnc     sourceupshort\r
 595 #ifdef __BORLANDC__\r
 596         }\r
 597 #endif\r
 598 bit1short:\r
 599 #ifdef __BORLANDC__\r
 600         __asm {\r
 601 #endif\r
 602                 mov     dx,[ss:bx+2]            // take bit1 path\r
 603                 shl     cl,1                            // advance to next bit position\r
 604                 jnc     sourceupshort\r
 605 #ifdef __BORLANDC__\r
 606         }\r
 607 #endif\r
 608 newbyteshort:\r
 609 #ifdef __BORLANDC__\r
 610         __asm {\r
 611 #endif\r
 612                 mov     ch,[si]                         // load next byte\r
 613                 inc     si\r
 614                 mov     cl,1                            // back to first bit\r
 615 #ifdef __BORLANDC__\r
 616         }\r
 617 #endif\r
 618 sourceupshort:\r
 619 #ifdef __BORLANDC__\r
 620         __asm {\r
 621 #endif\r
 622                 or      dh,dh                           // if dx<256 its a byte, else move node\r
 623                 jz      storebyteshort\r
 624                 mov     bx,dx                           // next node = (huffnode *)code\r
 625                 jmp     expandshort\r
 626 #ifdef __BORLANDC__\r
 627         }\r
 628 #endif\r
 629 storebyteshort:\r
 630 #ifdef __BORLANDC__\r
 631         __asm {\r
 632 #endif\r
 633                 mov     [es:di],dl\r
 634                 inc     di                                      // write a decopmpressed byte out\r
 635                 mov     bx,[word ptr headptr]           // back to the head node for next bit\r
 636 \r
 637                 cmp     di,ax                           // done?\r
 638                 jne     expandshort\r
 639         }\r
 640         }\r
 641         else\r
 642         {\r
 643 \r
 644 //--------------------------\r
 645 // expand more than 64k of data\r
 646 //--------------------------\r
 647 \r
 648   length--;\r
 649 \r
 650         __asm {\r
 651                 mov     bx,[word ptr headptr]\r
 652                 mov     cl,1\r
 653 \r
 654                 mov     si,[sourceoff]\r
 655                 mov     di,[destoff]\r
 656                 mov     es,[destseg]\r
 657                 mov     ds,[sourceseg]\r
 658 \r
 659                 lodsb                   // load first byte\r
 660 #ifdef __BORLANDC__\r
 661         }\r
 662 #endif\r
 663 expand:\r
 664 #ifdef __BORLANDC__\r
 665         __asm {\r
 666 #endif\r
 667                 test    al,cl           // bit set?\r
 668                 jnz     bit1\r
 669                 mov     dx,[ss:bx]      // take bit0 path from node\r
 670                 jmp     gotcode\r
 671 #ifdef __BORLANDC__\r
 672         }\r
 673 #endif\r
 674 bit1:\r
 675 #ifdef __BORLANDC__\r
 676         __asm {\r
 677 #endif\r
 678                 mov     dx,[ss:bx+2]    // take bit1 path\r
 679 #ifdef __BORLANDC__\r
 680         }\r
 681 #endif\r
 682 gotcode:\r
 683 #ifdef __BORLANDC__\r
 684         __asm {\r
 685 #endif\r
 686                 shl     cl,1            // advance to next bit position\r
 687                 jnc     sourceup\r
 688                 lodsb\r
 689                 cmp     si,0x10         // normalize ds:si\r
 690                 jb      sinorm\r
 691                 mov     cx,ds\r
 692                 inc     cx\r
 693                 mov     ds,cx\r
 694                 xor     si,si\r
 695 #ifdef __BORLANDC__\r
 696         }\r
 697 #endif\r
 698 sinorm:\r
 699 #ifdef __BORLANDC__\r
 700         __asm {\r
 701 #endif\r
 702                 mov     cl,1            // back to first bit\r
 703 #ifdef __BORLANDC__\r
 704         }\r
 705 #endif\r
 706 sourceup:\r
 707 #ifdef __BORLANDC__\r
 708         __asm {\r
 709 #endif\r
 710                 or      dh,dh           // if dx<256 its a byte, else move node\r
 711                 jz      storebyte\r
 712                 mov     bx,dx           // next node = (huffnode *)code\r
 713                 jmp     expand\r
 714 #ifdef __BORLANDC__\r
 715         }\r
 716 #endif\r
 717 storebyte:\r
 718 #ifdef __BORLANDC__\r
 719         __asm {\r
 720 #endif\r
 721                 mov     [es:di],dl\r
 722                 inc     di              // write a decopmpressed byte out\r
 723                 mov     bx,[word ptr headptr]   // back to the head node for next bit\r
 724 \r
 725                 cmp     di,0x10         // normalize es:di\r
 726                 jb      dinorm\r
 727                 mov     dx,es\r
 728                 inc     dx\r
 729                 mov     es,dx\r
 730                 xor     di,di\r
 731 #ifdef __BORLANDC__\r
 732         }\r
 733 #endif\r
 734 dinorm:\r
 735 #ifdef __BORLANDC__\r
 736         __asm {\r
 737 #endif\r
 738                 sub     [WORD PTR ss:length],1\r
 739                 jnc     expand\r
 740                 dec     [WORD PTR ss:length+2]\r
 741                 jns     expand          // when length = ffff ffff, done\r
 742         }\r
 743         }\r
 744 \r
 745         __asm {\r
 746                 mov     ax,ss\r
 747                 mov     ds,ax\r
 748         }\r
 749 \r
 750 }\r
 751 \r
 752 \r
 753 /*\r
 754 ======================\r
 755 =\r
 756 = CAL_CarmackExpand\r
 757 =\r
 758 = Length is the length of the EXPANDED data\r
 759 =\r
 760 ======================\r
 761 */\r
 762 \r
 763 #define NEARTAG 0xa7\r
 764 #define FARTAG  0xa8\r
 765 \r
 766 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)\r
 767 {\r
 768         unsigned        ch,chhigh,count,offset;\r
 769         unsigned        far *copyptr, far *inptr, far *outptr;\r
 770 \r
 771         length/=2;\r
 772 \r
 773         inptr = source;\r
 774         outptr = dest;\r
 775 \r
 776         while (length)\r
 777         {\r
 778                 ch = *inptr++;\r
 779                 chhigh = ch>>8;\r
 780                 if (chhigh == NEARTAG)\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 = *(/*(unsigned char far *)*/inptr)++;\r
 792                                 copyptr = outptr - offset;\r
 793                                 length -= count;\r
 794                                 while (count--)\r
 795                                         *outptr++ = *copyptr++;\r
 796                         }\r
 797                 }\r
 798                 else if (chhigh == FARTAG)\r
 799                 {\r
 800                         count = ch&0xff;\r
 801                         if (!count)\r
 802                         {                               // have to insert a word containing the tag byte\r
 803                                 ch |= *(/*(unsigned char far *)*/inptr)++;\r
 804                                 *outptr++ = ch;\r
 805                                 length --;\r
 806                         }\r
 807                         else\r
 808                         {\r
 809                                 offset = *inptr++;\r
 810                                 copyptr = dest + offset;\r
 811                                 length -= count;\r
 812                                 while (count--)\r
 813                                         *outptr++ = *copyptr++;\r
 814                         }\r
 815                 }\r
 816                 else\r
 817                 {\r
 818                         *outptr++ = ch;\r
 819                         length --;\r
 820                 }\r
 821         }\r
 822 }\r
 823 \r
 824 \r
 825 /*\r
 826 ======================\r
 827 =\r
 828 = CA_RLEWcompress\r
 829 =\r
 830 ======================\r
 831 */\r
 832 \r
 833 long CA_RLEWCompress (unsigned far *source, long length, unsigned far *dest,\r
 834   unsigned rlewtag)\r
 835 {\r
 836   long complength;\r
 837   unsigned value,count,i;\r
 838   unsigned far *start,far *end;\r
 839 \r
 840   start = dest;\r
 841 \r
 842   end = source + (length+1)/2;\r
 843 \r
 844 //\r
 845 // compress it\r
 846 //\r
 847   do\r
 848   {\r
 849         count = 1;\r
 850         value = *source++;\r
 851         while (*source == value && source<end)\r
 852         {\r
 853           count++;\r
 854           source++;\r
 855         }\r
 856         if (count>3 || value == rlewtag)\r
 857         {\r
 858     //\r
 859     // send a tag / count / value string\r
 860     //\r
 861       *dest++ = rlewtag;\r
 862       *dest++ = count;\r
 863       *dest++ = value;\r
 864     }\r
 865     else\r
 866     {\r
 867     //\r
 868     // send word without compressing\r
 869     //\r
 870       for (i=1;i<=count;i++)\r
 871         *dest++ = value;\r
 872         }\r
 873 \r
 874   } while (source<end);\r
 875 \r
 876   complength = 2*(dest-start);\r
 877   return complength;\r
 878 }\r
 879 \r
 880 \r
 881 /*\r
 882 ======================\r
 883 =\r
 884 = CA_RLEWexpand\r
 885 = length is EXPANDED length\r
 886 =\r
 887 ======================\r
 888 */\r
 889 \r
 890 void CA_RLEWexpand (unsigned far *source, unsigned far *dest,long length,\r
 891   unsigned rlewtag)\r
 892 {\r
 893 //  unsigned value,count,i;\r
 894   unsigned far *end;\r
 895   unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;\r
 896 \r
 897 \r
 898 //\r
 899 // expand it\r
 900 //\r
 901 #if 0\r
 902   do\r
 903   {\r
 904         value = *source++;\r
 905         if (value != rlewtag)\r
 906         //\r
 907         // uncompressed\r
 908         //\r
 909           *dest++=value;\r
 910         else\r
 911         {\r
 912         //\r
 913         // compressed string\r
 914         //\r
 915           count = *source++;\r
 916           value = *source++;\r
 917           for (i=1;i<=count;i++)\r
 918         *dest++ = value;\r
 919         }\r
 920   } while (dest<end);\r
 921 #endif\r
 922 \r
 923   end = dest + (length)/2;\r
 924   sourceseg = FP_SEG(source);\r
 925   sourceoff = FP_OFF(source);\r
 926   destseg = FP_SEG(dest);\r
 927   destoff = FP_OFF(dest);\r
 928   endseg = FP_SEG(end);\r
 929   endoff = FP_OFF(end);\r
 930 \r
 931 \r
 932 //\r
 933 // ax = source value\r
 934 // bx = tag value\r
 935 // cx = repeat counts\r
 936 // dx = scratch\r
 937 //\r
 938 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!\r
 939 //\r
 940         __asm {\r
 941                 mov     bx,rlewtag\r
 942                 mov     si,sourceoff\r
 943                 mov     di,destoff\r
 944                 mov     es,destseg\r
 945                 mov     ds,sourceseg\r
 946 #ifdef __BORLANDC__\r
 947         }\r
 948 #endif\r
 949 expand:\r
 950 #ifdef __BORLANDC__\r
 951         __asm {\r
 952 #endif\r
 953                 lodsw\r
 954                 cmp     ax,bx\r
 955                 je      repeat\r
 956                 stosw\r
 957                 jmp     next\r
 958 #ifdef __BORLANDC__\r
 959         }\r
 960 #endif\r
 961 repeat:\r
 962 #ifdef __BORLANDC__\r
 963         __asm {\r
 964 #endif\r
 965                 lodsw\r
 966                 mov     cx,ax           // repeat count\r
 967                 lodsw                   // repeat value\r
 968                 rep stosw\r
 969 #ifdef __BORLANDC__\r
 970         }\r
 971 #endif\r
 972 next:\r
 973 #ifdef __BORLANDC__\r
 974         __asm {\r
 975 #endif\r
 976                 cmp     si,0x10         // normalize ds:si\r
 977                 jb      sinorm\r
 978                 mov     ax,si\r
 979                 shr     ax,1\r
 980                 shr     ax,1\r
 981                 shr     ax,1\r
 982                 shr     ax,1\r
 983                 mov     dx,ds\r
 984                 add     dx,ax\r
 985                 mov     ds,dx\r
 986                 and     si,0xf\r
 987 #ifdef __BORLANDC__\r
 988         }\r
 989 #endif\r
 990 sinorm:\r
 991 #ifdef __BORLANDC__\r
 992         __asm {\r
 993 #endif\r
 994                 cmp     di,0x10         // normalize es:di\r
 995                 jb      dinorm\r
 996                 mov     ax,di\r
 997                 shr     ax,1\r
 998                 shr     ax,1\r
 999                 shr     ax,1\r
1000                 shr     ax,1\r
1001                 mov     dx,es\r
1002                 add     dx,ax\r
1003                 mov     es,dx\r
1004                 and     di,0xf\r
1005 #ifdef __BORLANDC__\r
1006         }\r
1007 #endif\r
1008 dinorm:\r
1009 #ifdef __BORLANDC__\r
1010         __asm {\r
1011 #endif\r
1012                 cmp     di,ss:endoff\r
1013                 jne     expand\r
1014                 mov     ax,es\r
1015                 cmp     ax,ss:endseg\r
1016                 jb      expand\r
1017 \r
1018                 mov     ax,ss\r
1019                 mov     ds,ax\r
1020         }\r
1021 }\r
1022 \r
1023 \r
1024 /*\r
1025 =============================================================================\r
1026 \r
1027                                          CACHE MANAGER ROUTINES\r
1028 \r
1029 =============================================================================\r
1030 */\r
1031 \r
1032 /*\r
1033 ======================\r
1034 =\r
1035 = CAL_SetupGrFile\r
1036 =\r
1037 ======================\r
1038 */\r
1039 \r
1040 void CAL_SetupGrFile (global_game_variables_t *gvar)\r
1041 {\r
1042         char fname[13];\r
1043         int handle;\r
1044         memptr compseg;\r
1045 \r
1046 #ifdef GRHEADERLINKED\r
1047 \r
1048         gvar->ca.grhuffman = (huffnode *)&VGAdict;\r
1049         grstarts = (long _seg *)FP_SEG(&VGAhead);\r
1050 \r
1051         CAL_OptimizeNodes (gvar->ca.grhuffman);\r
1052 \r
1053 #else\r
1054 \r
1055 //\r
1056 // load ???dict.ext (huffman dictionary for graphics files)\r
1057 //\r
1058 \r
1059         strcpy(fname,GDICTNAME);\r
1060         strcat(fname,EXTENSION);\r
1061 \r
1062         if ((handle = open(fname,\r
1063                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1064                 CA_CannotOpen(fname,gvar);\r
1065 \r
1066         read(handle, &gvar->ca.grhuffman, sizeof(gvar->ca.grhuffman));\r
1067         close(handle);\r
1068         CAL_OptimizeNodes (gvar->ca.grhuffman);\r
1069 //\r
1070 // load the data offsets from ???head.ext\r
1071 //\r
1072         MM_GetPtr (MEMPTR gvar->ca.grstarts,(NUMCHUNKS+1)*FILEPOSSIZE, gvar);\r
1073 \r
1074         strcpy(fname,GHEADNAME);\r
1075         strcat(fname,EXTENSION);\r
1076 \r
1077         if ((handle = open(fname,\r
1078                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1079                 CA_CannotOpen(fname,gvar);\r
1080 \r
1081         CA_FarRead(handle, (memptr)gvar->ca.grstarts, (NUMCHUNKS+1)*FILEPOSSIZE, gvar);\r
1082 \r
1083         close(handle);\r
1084 \r
1085 \r
1086 #endif\r
1087 \r
1088 //\r
1089 // Open the graphics file, leaving it open until the game is finished\r
1090 //\r
1091         strcpy(fname,GFILENAME);\r
1092         strcat(fname,EXTENSION);\r
1093 \r
1094         gvar->ca.file.grhandle = open(fname, O_RDONLY | O_BINARY);\r
1095         if (gvar->ca.file.grhandle == -1)\r
1096                 CA_CannotOpen(fname,gvar);\r
1097 \r
1098 \r
1099 //\r
1100 // load the pic and sprite headers into the arrays in the data segment\r
1101 //\r
1102 #if NUMPICS>0\r
1103         MM_GetPtr(MEMPTR gvar->video.pictable,NUMPICS*sizeof(pictabletype),gvar);\r
1104         CAL_GetGrChunkLength(STRUCTPIC,gvar);           // position file pointer\r
1105         MM_GetPtr(&compseg,gvar->ca.chunkcomplen, gvar);\r
1106         CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen,gvar);\r
1107         CAL_HuffExpand (compseg, (byte far *)gvar->video.pictable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);\r
1108         MM_FreePtr(&compseg,gvar);\r
1109 #endif\r
1110 \r
1111 #if NUMPICM>0\r
1112         MM_GetPtr(MEMPTR picmtable,NUMPICM*sizeof(pictabletype));\r
1113         CAL_GetGrChunkLength(STRUCTPICM);               // position file pointer\r
1114         MM_GetPtr(&compseg,gvar->ca.chunkcomplen);\r
1115         CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);\r
1116         CAL_HuffExpand (compseg, (byte far *)picmtable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);\r
1117         MM_FreePtr(&compseg);\r
1118 #endif\r
1119 \r
1120 #if NUMSPRITES>0\r
1121         MM_GetPtr(MEMPTR spritetable,NUMSPRITES*sizeof(spritetabletype));\r
1122         CAL_GetGrChunkLength(STRUCTSPRITE);     // position file pointer\r
1123         MM_GetPtr(&compseg,gvar->ca.chunkcomplen);\r
1124         CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);\r
1125         CAL_HuffExpand (compseg, (byte far *)spritetable,NUMSPRITES*sizeof(spritetabletype),gvar->ca.grhuffman);\r
1126         MM_FreePtr(&compseg);\r
1127 #endif\r
1128 \r
1129 }\r
1130 \r
1131 //==========================================================================\r
1132 \r
1133 \r
1134 /*\r
1135 ======================\r
1136 =\r
1137 = CAL_SetupMapFile\r
1138 =\r
1139 ======================\r
1140 */\r
1141 \r
1142 void CAL_SetupMapFile (global_game_variables_t *gvar)\r
1143 {\r
1144 #ifndef MAPHEADERLINKED\r
1145         int handle;\r
1146         long length;\r
1147 #endif\r
1148 \r
1149 //\r
1150 // load maphead.ext (offsets and tileinfo for map file)\r
1151 //\r
1152 #ifndef MAPHEADERLINKED\r
1153         if ((handle = open("maphead.mph",\r
1154                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1155                 Quit (gvar, "Can't open maphead.mph");\r
1156         length = filelength(handle);\r
1157         MM_GetPtr (MEMPTR gvar->ca.tinf,length,gvar);\r
1158         CA_FarRead(handle, gvar->ca.tinf, length,gvar);\r
1159         close(handle);\r
1160 //#else\r
1161 \r
1162         gvar->ca.tinf = (byte _seg *)FP_SEG(&maphead);\r
1163 \r
1164 #endif\r
1165 \r
1166 //\r
1167 // open the data file\r
1168 //\r
1169 //TODO: multiple files\r
1170         if ((gvar->ca.file.maphandle = open("data/test.map",\r
1171                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1172                 Quit (gvar, "Can't open data/test.map!");\r
1173 /*#ifdef MAPHEADERLINKED\r
1174         if ((maphandle = open("GAMEMAPS.16"ENSION,\r
1175                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1176                 Quit ("Can't open GAMEMAPS.16"ENSION"!");\r
1177 #else\r
1178         if ((maphandle = open("MAPTEMP.16"ENSION,\r
1179                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1180                 Quit ("Can't open MAPTEMP.16"ENSION"!");\r
1181 #endif*/\r
1182 }\r
1183 \r
1184 //==========================================================================\r
1185 \r
1186 \r
1187 /*\r
1188 ======================\r
1189 =\r
1190 = CAL_SetupAudioFile\r
1191 =\r
1192 ======================\r
1193 */\r
1194 \r
1195 /*void CAL_SetupAudioFile (void)\r
1196 {\r
1197         int handle;\r
1198         long length;\r
1199 \r
1200 //\r
1201 // load maphead.ext (offsets and tileinfo for map file)\r
1202 //\r
1203 #ifndef AUDIOHEADERLINKED\r
1204         if ((handle = open("AUDIOHED.16",\r
1205                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1206                 Quit (gvar, "Can't open AUDIOHED.16""!");\r
1207         length = filelength(handle);\r
1208         MM_GetPtr (MEMPTR audiostarts,length);\r
1209         CA_FarRead(handle, (byte far *)audiostarts, length);\r
1210         close(handle);\r
1211 #else\r
1212         audiohuffman = (huffnode *)&audiodict;\r
1213         CAL_OptimizeNodes (audiohuffman);\r
1214         audiostarts = (long _seg *)FP_SEG(&audiohead);\r
1215 #endif\r
1216 \r
1217 //\r
1218 // open the data file\r
1219 //\r
1220 #ifndef AUDIOHEADERLINKED\r
1221         if ((audiohandle = open("AUDIOT.16",\r
1222                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1223                 Quit (gvar, "Can't open AUDIOT.16""!");\r
1224 #else\r
1225         if ((audiohandle = open("AUDIO.16",\r
1226                  O_RDONLY | O_BINARY, S_IREAD)) == -1)\r
1227                 Quit (gvar, "Can't open AUDIO.16""!");\r
1228 #endif\r
1229 }*/\r
1230 \r
1231 //==========================================================================\r
1232 \r
1233 \r
1234 /*\r
1235 ======================\r
1236 =\r
1237 = CA_Startup\r
1238 =\r
1239 = Open all files and load in headers\r
1240 =\r
1241 ======================\r
1242 */\r
1243 \r
1244 void CA_Startup(global_game_variables_t *gvar)\r
1245 {\r
1246 #ifdef PROFILE\r
1247 #ifdef __BORLANDC__\r
1248         unlink("profile.16b");\r
1249         gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);\r
1250 #endif\r
1251 #ifdef __WATCOMC__\r
1252         unlink("profile.16w");\r
1253         gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);\r
1254 #endif\r
1255 #endif//profile\r
1256 \r
1257 #ifdef __BORLANDC__\r
1258         unlink("meminfo.16b");\r
1259         gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);\r
1260 #endif\r
1261 #ifdef __WATCOMC__\r
1262         unlink("meminfo.16w");\r
1263         gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);\r
1264 #endif\r
1265 \r
1266 \r
1267 #ifndef NOMAPS\r
1268         CAL_SetupMapFile (gvar);\r
1269 #endif\r
1270 #ifndef NOGRAPHICS\r
1271         CAL_SetupGrFile (gvar);\r
1272 #endif\r
1273 #ifndef NOAUDIO\r
1274         CAL_SetupMapFile (gvar);\r
1275 #endif\r
1276 \r
1277         gvar->ca.camap.mapon = -1;\r
1278         gvar->ca.ca_levelbit = 1;\r
1279         gvar->ca.ca_levelnum = 0;\r
1280 \r
1281 /*      drawcachebox    = CAL_DialogDraw;\r
1282         updatecachebox  = CAL_DialogUpdate;\r
1283         finishcachebox  = CAL_DialogFinish;*/\r
1284 }\r
1285 \r
1286 //==========================================================================\r
1287 \r
1288 \r
1289 /*\r
1290 ======================\r
1291 =\r
1292 = CA_Shutdown\r
1293 =\r
1294 = Closes all files\r
1295 =\r
1296 ======================\r
1297 */\r
1298 \r
1299 void CA_Shutdown(global_game_variables_t *gvar)\r
1300 {\r
1301 #ifdef PROFILE\r
1302         close(gvar->handle.profilehandle);\r
1303 #endif\r
1304         close(gvar->handle.showmemhandle);\r
1305 \r
1306         close(gvar->ca.file.maphandle);\r
1307         close(gvar->ca.file.grhandle);\r
1308         close(gvar->ca.file.audiohandle);\r
1309 }\r
1310 \r
1311 //===========================================================================\r
1312 \r
1313 /*\r
1314 ======================\r
1315 =\r
1316 = CA_CacheAudioChunk\r
1317 =\r
1318 ======================\r
1319 */\r
1320 /*++++\r
1321 void CA_CacheAudioChunk (int chunk)\r
1322 {\r
1323         long    pos,compressed;\r
1324 #ifdef AUDIOHEADERLINKED\r
1325         long    expanded;\r
1326         memptr  bigbufferseg;\r
1327         byte    far *source;\r
1328 #endif\r
1329 \r
1330         if (audiosegs[chunk])\r
1331         {\r
1332                 MM_SetPurge (MEMPTR audiosegs[chunk],0);\r
1333                 return;                                                 // allready in memory\r
1334         }\r
1335 \r
1336 // MDM begin - (GAMERS EDGE)\r
1337 //\r
1338         if (!FindFile("AUDIO.16",NULL,2))\r
1339                 Quit (gvar, "CA_CacheAudioChunk(): Can't find audio files.");\r
1340 //\r
1341 // MDM end\r
1342 \r
1343 //\r
1344 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate\r
1345 // a larger buffer\r
1346 //\r
1347         pos = audiostarts[chunk];\r
1348         compressed = audiostarts[chunk+1]-pos;\r
1349 \r
1350         lseek(audiohandle,pos,SEEK_SET);\r
1351 \r
1352 #ifndef AUDIOHEADERLINKED\r
1353 \r
1354         MM_GetPtr (MEMPTR audiosegs[chunk],compressed);\r
1355         if (mmerror)\r
1356                 return;\r
1357 \r
1358         CA_FarRead(audiohandle,audiosegs[chunk],compressed);\r
1359 \r
1360 #else\r
1361 \r
1362         if (compressed<=BUFFERSIZE)\r
1363         {\r
1364                 CA_FarRead(audiohandle,bufferseg,compressed);\r
1365                 source = bufferseg;\r
1366         }\r
1367         else\r
1368         {\r
1369                 MM_GetPtr(&bigbufferseg,compressed);\r
1370                 if (mmerror)\r
1371                         return;\r
1372                 MM_SetLock (&bigbufferseg,true);\r
1373                 CA_FarRead(audiohandle,bigbufferseg,compressed);\r
1374                 source = bigbufferseg;\r
1375         }\r
1376 \r
1377         expanded = *(long far *)source;\r
1378         source += 4;                    // skip over length\r
1379         MM_GetPtr (MEMPTR audiosegs[chunk],expanded);\r
1380         if (mmerror)\r
1381                 goto done;\r
1382         CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);\r
1383 \r
1384 done:\r
1385         if (compressed>BUFFERSIZE)\r
1386                 MM_FreePtr(&bigbufferseg);\r
1387 #endif\r
1388 }*/\r
1389 \r
1390 //===========================================================================\r
1391 \r
1392 /*\r
1393 ======================\r
1394 =\r
1395 = CA_LoadAllSounds\r
1396 =\r
1397 = Purges all sounds, then loads all new ones (mode switch)\r
1398 =\r
1399 ======================\r
1400 */\r
1401 /*++++\r
1402 void CA_LoadAllSounds (void)\r
1403 {\r
1404         unsigned        start,i;\r
1405 \r
1406         switch (oldsoundmode)\r
1407         {\r
1408         case sdm_Off:\r
1409                 goto cachein;\r
1410         case sdm_PC:\r
1411                 start = STARTPCSOUNDS;\r
1412                 break;\r
1413         case sdm_AdLib:\r
1414                 start = STARTADLIBSOUNDS;\r
1415                 break;\r
1416         }\r
1417 \r
1418         for (i=0;i<NUMSOUNDS;i++,start++)\r
1419                 if (audiosegs[start])\r
1420                         MM_SetPurge (MEMPTR audiosegs[start],3);                // make purgable\r
1421 \r
1422 cachein:\r
1423 \r
1424         switch (SoundMode)\r
1425         {\r
1426         case sdm_Off:\r
1427                 return;\r
1428         case sdm_PC:\r
1429                 start = STARTPCSOUNDS;\r
1430                 break;\r
1431         case sdm_AdLib:\r
1432                 start = STARTADLIBSOUNDS;\r
1433                 break;\r
1434         }\r
1435 \r
1436         for (i=0;i<NUMSOUNDS;i++,start++)\r
1437                 CA_CacheAudioChunk (start);\r
1438 \r
1439         oldsoundmode = SoundMode;\r
1440 }*/\r
1441 \r
1442 //===========================================================================\r
1443 \r
1444 //????#if GRMODE == EGAGR\r
1445 #if 0\r
1446 \r
1447 /*\r
1448 ======================\r
1449 =\r
1450 = CAL_ShiftSprite\r
1451 =\r
1452 = Make a shifted (one byte wider) copy of a sprite into another area\r
1453 =\r
1454 ======================\r
1455 */\r
1456 \r
1457 unsigned        static  sheight,swidth;\r
1458 boolean static dothemask;\r
1459 \r
1460 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,\r
1461         unsigned width, unsigned height, unsigned pixshift, boolean domask)\r
1462 {\r
1463 \r
1464         sheight = height;               // because we are going to reassign bp\r
1465         swidth = width;\r
1466         dothemask = domask;\r
1467 \r
1468         __asm {\r
1469                 mov     ax,[segment]\r
1470                 mov     ds,ax           // source and dest are in same segment, and all local\r
1471 \r
1472                 mov     bx,[source]\r
1473                 mov     di,[dest]\r
1474 \r
1475                 mov     bp,[pixshift]\r
1476                 shl     bp,1\r
1477                 mov     bp,WORD PTR [shifttabletable+bp]        // bp holds pointer to shift table\r
1478 \r
1479                 cmp     [ss:dothemask],0\r
1480                 je              skipmask\r
1481 \r
1482 //\r
1483 // table shift the mask\r
1484 //\r
1485                 mov     dx,[ss:sheight]\r
1486 #ifdef __BORLANDC__\r
1487         }\r
1488 #endif\r
1489 domaskrow:\r
1490 #ifdef __BORLANDC__\r
1491         __asm {\r
1492 #endif\r
1493                 mov     BYTE PTR [di],255       // 0xff first byte\r
1494                 mov     cx,ss:[swidth]\r
1495 #ifdef __BORLANDC__\r
1496         }\r
1497 #endif\r
1498 domaskbyte:\r
1499 #ifdef __BORLANDC__\r
1500         __asm {\r
1501 #endif\r
1502                 mov     al,[bx]                         // source\r
1503                 not     al\r
1504                 inc     bx                                      // next source byte\r
1505                 xor     ah,ah\r
1506                 shl     ax,1\r
1507                 mov     si,ax\r
1508                 mov     ax,[bp+si]                      // table shift into two bytes\r
1509                 not     ax\r
1510                 and     [di],al                         // and with first byte\r
1511                 inc     di\r
1512                 mov     [di],ah                         // replace next byte\r
1513 \r
1514                 loop    domaskbyte\r
1515 \r
1516                 inc     di                                      // the last shifted byte has 1s in it\r
1517                 dec     dx\r
1518                 jnz     domaskrow\r
1519 #ifdef __BORLANDC__\r
1520         }\r
1521 #endif\r
1522 skipmask:\r
1523 #ifdef __BORLANDC__\r
1524         __asm {\r
1525 #endif\r
1526 //\r
1527 // table shift the data\r
1528 //\r
1529                 mov     dx,ss:[sheight]\r
1530                 shl     dx,1\r
1531                 shl     dx,1                            // four planes of data\r
1532 #ifdef __BORLANDC__\r
1533         }\r
1534 #endif\r
1535 dodatarow:\r
1536 #ifdef __BORLANDC__\r
1537         __asm {\r
1538 #endif\r
1539                 mov     BYTE PTR [di],0         // 0 first byte\r
1540                 mov     cx,ss:[swidth]\r
1541 #ifdef __BORLANDC__\r
1542         }\r
1543 #endif\r
1544 dodatabyte:\r
1545 #ifdef __BORLANDC__\r
1546         __asm {\r
1547 #endif\r
1548                 mov     al,[bx]                         // source\r
1549                 inc     bx                                      // next source byte\r
1550                 xor     ah,ah\r
1551                 shl     ax,1\r
1552                 mov     si,ax\r
1553                 mov     ax,[bp+si]                      // table shift into two bytes\r
1554                 or      [di],al                         // or with first byte\r
1555                 inc     di\r
1556                 mov     [di],ah                         // replace next byte\r
1557 \r
1558                 loop    dodatabyte\r
1559 \r
1560                 inc     di                                      // the last shifted byte has 0s in it\r
1561                 dec     dx\r
1562                 jnz     dodatarow\r
1563 \r
1564 //\r
1565 // done\r
1566 //\r
1567 \r
1568                 mov     ax,ss                           // restore data segment\r
1569                 mov     ds,ax\r
1570         }\r
1571 \r
1572 }\r
1573 \r
1574 #endif\r
1575 \r
1576 //===========================================================================\r
1577 \r
1578 /*\r
1579 ======================\r
1580 =\r
1581 = CAL_CacheSprite\r
1582 =\r
1583 = Generate shifts and set up sprite structure for a given sprite\r
1584 =\r
1585 ======================\r
1586 */\r
1587 /*++++\r
1588 void CAL_CacheSprite (int chunk, byte far *compressed)\r
1589 {\r
1590         int i;\r
1591         unsigned shiftstarts[5];\r
1592         unsigned smallplane,bigplane,expanded;\r
1593         spritetabletype far *spr;\r
1594         spritetype _seg *dest;\r
1595 \r
1596 #if GRMODE == CGAGR\r
1597 //\r
1598 // CGA has no pel panning, so shifts are never needed\r
1599 //\r
1600         spr = &spritetable[chunk-STARTSPRITES];\r
1601         smallplane = spr->width*spr->height;\r
1602         MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);\r
1603         if (mmerror)\r
1604                 return;\r
1605         dest = (spritetype _seg *)grsegs[chunk];\r
1606         dest->sourceoffset[0] = MAXSHIFTS*6;    // start data after 3 unsigned tables\r
1607         dest->planesize[0] = smallplane;\r
1608         dest->width[0] = spr->width;\r
1609 \r
1610 //\r
1611 // expand the unshifted shape\r
1612 //\r
1613         CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,gvar->ca.grhuffman);\r
1614 \r
1615 #endif\r
1616 \r
1617 \r
1618 #if GRMODE == EGAGR\r
1619 \r
1620 //\r
1621 // calculate sizes\r
1622 //\r
1623         spr = &spritetable[chunk-STARTSPRITES];\r
1624         smallplane = spr->width*spr->height;\r
1625         bigplane = (spr->width+1)*spr->height;\r
1626 \r
1627         shiftstarts[0] = MAXSHIFTS*6;   // start data after 3 unsigned tables\r
1628         shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite\r
1629         shiftstarts[2] = shiftstarts[1] + bigplane*5;\r
1630         shiftstarts[3] = shiftstarts[2] + bigplane*5;\r
1631         shiftstarts[4] = shiftstarts[3] + bigplane*5;   // nothing ever put here\r
1632 \r
1633         expanded = shiftstarts[spr->shifts];\r
1634         MM_GetPtr (&grsegs[chunk],expanded);\r
1635         if (mmerror)\r
1636                 return;\r
1637         dest = (spritetype _seg *)grsegs[chunk];\r
1638 \r
1639 //\r
1640 // expand the unshifted shape\r
1641 //\r
1642         CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,gvar->ca.grhuffman);\r
1643 \r
1644 //\r
1645 // make the shifts!\r
1646 //\r
1647         switch (spr->shifts)\r
1648         {\r
1649         case    1:\r
1650                 for (i=0;i<4;i++)\r
1651                 {\r
1652                         dest->sourceoffset[i] = shiftstarts[0];\r
1653                         dest->planesize[i] = smallplane;\r
1654                         dest->width[i] = spr->width;\r
1655                 }\r
1656                 break;\r
1657 \r
1658         case    2:\r
1659                 for (i=0;i<2;i++)\r
1660                 {\r
1661                         dest->sourceoffset[i] = shiftstarts[0];\r
1662                         dest->planesize[i] = smallplane;\r
1663                         dest->width[i] = spr->width;\r
1664                 }\r
1665                 for (i=2;i<4;i++)\r
1666                 {\r
1667                         dest->sourceoffset[i] = shiftstarts[1];\r
1668                         dest->planesize[i] = bigplane;\r
1669                         dest->width[i] = spr->width+1;\r
1670                 }\r
1671                 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],\r
1672                         dest->sourceoffset[2],spr->width,spr->height,4,true);\r
1673                 break;\r
1674 \r
1675         case    4:\r
1676                 dest->sourceoffset[0] = shiftstarts[0];\r
1677                 dest->planesize[0] = smallplane;\r
1678                 dest->width[0] = spr->width;\r
1679 \r
1680                 dest->sourceoffset[1] = shiftstarts[1];\r
1681                 dest->planesize[1] = bigplane;\r
1682                 dest->width[1] = spr->width+1;\r
1683                 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],\r
1684                         dest->sourceoffset[1],spr->width,spr->height,2,true);\r
1685 \r
1686                 dest->sourceoffset[2] = shiftstarts[2];\r
1687                 dest->planesize[2] = bigplane;\r
1688                 dest->width[2] = spr->width+1;\r
1689                 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],\r
1690                         dest->sourceoffset[2],spr->width,spr->height,4,true);\r
1691 \r
1692                 dest->sourceoffset[3] = shiftstarts[3];\r
1693                 dest->planesize[3] = bigplane;\r
1694                 dest->width[3] = spr->width+1;\r
1695                 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],\r
1696                         dest->sourceoffset[3],spr->width,spr->height,6,true);\r
1697 \r
1698                 break;\r
1699 \r
1700         default:\r
1701                 Quit (gvar, "CAL_CacheSprite: Bad shifts number!");\r
1702         }\r
1703 \r
1704 #endif\r
1705 }*/\r
1706 \r
1707 //===========================================================================\r
1708 \r
1709 \r
1710 /*\r
1711 ======================\r
1712 =\r
1713 = CAL_ExpandGrChunk\r
1714 =\r
1715 = Does whatever is needed with a pointer to a compressed chunk\r
1716 =\r
1717 ======================\r
1718 */\r
1719 /*++++\r
1720 void CAL_ExpandGrChunk (int chunk, byte far *source)\r
1721 {\r
1722         long    expanded;\r
1723 \r
1724 \r
1725         if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)\r
1726         {\r
1727         //\r
1728         // expanded sizes of tile8/16/32 are implicit\r
1729         //\r
1730 \r
1731 #if GRMODE == EGAGR\r
1732 #define BLOCK           32\r
1733 #define MASKBLOCK       40\r
1734 #endif\r
1735 \r
1736 #if GRMODE == CGAGR\r
1737 #define BLOCK           16\r
1738 #define MASKBLOCK       32\r
1739 #endif\r
1740 \r
1741                 if (chunk<STARTTILE8M)                  // tile 8s are all in one chunk!\r
1742                         expanded = BLOCK*NUMTILE8;\r
1743                 else if (chunk<STARTTILE16)\r
1744                         expanded = MASKBLOCK*NUMTILE8M;\r
1745                 else if (chunk<STARTTILE16M)    // all other tiles are one/chunk\r
1746                         expanded = BLOCK*4;\r
1747                 else if (chunk<STARTTILE32)\r
1748                         expanded = MASKBLOCK*4;\r
1749                 else if (chunk<STARTTILE32M)\r
1750                         expanded = BLOCK*16;\r
1751                 else\r
1752                         expanded = MASKBLOCK*16;\r
1753         }\r
1754         else\r
1755         {\r
1756         //\r
1757         // everything else has an explicit size longword\r
1758         //\r
1759                 expanded = *(long far *)source;\r
1760                 source += 4;                    // skip over length\r
1761         }\r
1762 \r
1763 //\r
1764 // allocate final space, decompress it, and free bigbuffer\r
1765 // Sprites need to have shifts made and various other junk\r
1766 //\r
1767         if (chunk>=STARTSPRITES && chunk< STARTTILE8)\r
1768                 CAL_CacheSprite(chunk,source);\r
1769         else\r
1770         {\r
1771                 MM_GetPtr (&grsegs[chunk],expanded);\r
1772                 if (mmerror)\r
1773                         return;\r
1774                 CAL_HuffExpand (source,grsegs[chunk],expanded,gvar->ca.grhuffman);\r
1775         }\r
1776 }\r
1777 */\r
1778 \r
1779 /*\r
1780 ======================\r
1781 =\r
1782 = CAL_ReadGrChunk\r
1783 =\r
1784 = Gets a chunk off disk, optimizing reads to general buffer\r
1785 =\r
1786 ======================\r
1787 */\r
1788 /*++++\r
1789 void CAL_ReadGrChunk (int chunk)\r
1790 {\r
1791         long    pos,compressed;\r
1792         memptr  bigbufferseg;\r
1793         byte    far *source;\r
1794         int             next;\r
1795 \r
1796 //\r
1797 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate\r
1798 // a larger buffer\r
1799 //\r
1800         pos = GRFILEPOS(chunk);\r
1801         if (pos<0)                                                      // $FFFFFFFF start is a sparse tile\r
1802           return;\r
1803 \r
1804         next = chunk +1;\r
1805         while (GRFILEPOS(next) == -1)           // skip past any sparse tiles\r
1806                 next++;\r
1807 \r
1808         compressed = GRFILEPOS(next)-pos;\r
1809 \r
1810         lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
1811 \r
1812         if (compressed<=BUFFERSIZE)\r
1813         {\r
1814                 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);\r
1815                 source = bufferseg;\r
1816         }\r
1817         else\r
1818         {\r
1819                 MM_GetPtr(&bigbufferseg,compressed);\r
1820                 if (mmerror)\r
1821                         return;\r
1822                 MM_SetLock (&bigbufferseg,true);\r
1823                 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);\r
1824                 source = bigbufferseg;\r
1825         }\r
1826 \r
1827         CAL_ExpandGrChunk (chunk,source);\r
1828 \r
1829         if (compressed>BUFFERSIZE)\r
1830                 MM_FreePtr(&bigbufferseg);\r
1831 }\r
1832 */\r
1833 /*\r
1834 ======================\r
1835 =\r
1836 = CA_CacheGrChunk\r
1837 =\r
1838 = Makes sure a given chunk is in memory, loadiing it if needed\r
1839 =\r
1840 ======================\r
1841 */\r
1842 /*++++\r
1843 void CA_CacheGrChunk (int chunk)\r
1844 {\r
1845         long    pos,compressed;\r
1846         memptr  bigbufferseg;\r
1847         byte    far *source;\r
1848         int             next;\r
1849 \r
1850         gvar->ca.grneeded[chunk] |= ca_levelbit;                // make sure it doesn't get removed\r
1851         if (grsegs[chunk])\r
1852         {\r
1853                 MM_SetPurge (&grsegs[chunk],0);\r
1854                 return;                                                 // allready in memory\r
1855         }\r
1856 \r
1857 // MDM begin - (GAMERS EDGE)\r
1858 //\r
1859         if (!FindFile("EGAGRAPH.16",NULL,2))\r
1860                 Quit (gvar, "CA_CacheGrChunk(): Can't find graphics files.");\r
1861 //\r
1862 // MDM end\r
1863 \r
1864 //\r
1865 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate\r
1866 // a larger buffer\r
1867 //\r
1868         pos = GRFILEPOS(chunk);\r
1869         if (pos<0)                                                      // $FFFFFFFF start is a sparse tile\r
1870           return;\r
1871 \r
1872         next = chunk +1;\r
1873         while (GRFILEPOS(next) == -1)           // skip past any sparse tiles\r
1874                 next++;\r
1875 \r
1876         compressed = GRFILEPOS(next)-pos;\r
1877 \r
1878         lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
1879 \r
1880         if (compressed<=BUFFERSIZE)\r
1881         {\r
1882                 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);\r
1883                 source = bufferseg;\r
1884         }\r
1885         else\r
1886         {\r
1887                 MM_GetPtr(&bigbufferseg,compressed);\r
1888                 MM_SetLock (&bigbufferseg,true);\r
1889                 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);\r
1890                 source = bigbufferseg;\r
1891         }\r
1892 \r
1893         CAL_ExpandGrChunk (chunk,source);\r
1894 \r
1895         if (compressed>BUFFERSIZE)\r
1896                 MM_FreePtr(&bigbufferseg);\r
1897 }\r
1898 */\r
1899 \r
1900 \r
1901 //==========================================================================\r
1902 \r
1903 /*\r
1904 ======================\r
1905 =\r
1906 = CA_CacheMap\r
1907 =\r
1908 ======================\r
1909 */\r
1910 /*++++ segments!\r
1911 void CA_CacheMap (global_game_variables_t *gvar)\r
1912 {\r
1913         long    pos,compressed;\r
1914         int             plane;\r
1915         memptr  *dest,bigbufferseg;\r
1916         unsigned        size;\r
1917         unsigned        far     *source;\r
1918 #ifdef MAPHEADERLINKED\r
1919         memptr  buffer2seg;\r
1920         long    expanded;\r
1921 #endif\r
1922 \r
1923 \r
1924 //\r
1925 // free up memory from last map\r
1926 //\r
1927         if (gvar->ca.camap.mapon>-1 && gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapon])\r
1928                 MM_SetPurge (((memptr)gvar->ca.camap.mapheaderseg[(gvar->ca.camap.mapon)]), 3, gvar);\r
1929         for (plane=0;plane<MAPPLANES;plane++)\r
1930                 if (gvar->ca.camap.mapsegs[plane])\r
1931                         MM_FreePtr ((memptr)gvar->ca.camap.mapsegs[plane], gvar);\r
1932 \r
1933         gvar->ca.camap.mapon = gvar->ca.camap.mapnum;\r
1934 \r
1935 \r
1936 //\r
1937 // load map header\r
1938 // The header will be cached if it is still around\r
1939 //\r
1940 //      if (!gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapnum])\r
1941 //      {\r
1942 //              //pos = ((mapfiletype   _seg *)tinf)->headeroffsets[mapnum];\r
1943 //              //pos = ((_seg *)gvar->ca.camap.tinf)->headeroffsets[gvar->ca.camap.mapnum];\r
1944 //              pos = ((memptr)gvar->ca.camap.tinf)->headeroffsets[gvar->ca.camap.mapnum];\r
1945 //              if (pos<0)                                              // $FFFFFFFF start is a sparse map\r
1946 //                printf("CA_CacheMap: Tried to load a non existent map!");\r
1947 \r
1948 //              MM_GetPtr(MEMPTR gvar->ca.camapheaderseg[mapnum],sizeof(maptype));\r
1949 //              lseek(maphandle,pos,SEEK_SET);\r
1950 //              CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));\r
1951 //      }\r
1952 //      else\r
1953 //              MM_SetPurge (MEMPTR mapheaderseg[mapnum], 0, &(gvar->mm));\r
1954 \r
1955 //\r
1956 // load the planes in\r
1957 // If a plane's pointer still exists it will be overwritten (levels are\r
1958 // allways reloaded, never cached)\r
1959 //\r
1960 \r
1961         size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;\r
1962 \r
1963         for (plane = 0; plane<MAPPLANES; plane++)\r
1964         {\r
1965                 //pos = mapheaderseg[mapnum]->planestart[plane];\r
1966                 //compressed = mapheaderseg[mapnum]->planelength[plane];\r
1967 \r
1968                 if (!compressed)\r
1969                         continue;               // the plane is not used in this game\r
1970 \r
1971                 dest = MEMPTR mapsegs[plane];\r
1972                 MM_GetPtr(dest,size);\r
1973 \r
1974                 lseek(maphandle,pos,SEEK_SET);\r
1975                 if (compressed<=BUFFERSIZE)\r
1976                         source = bufferseg;\r
1977                 else\r
1978                 {\r
1979                         MM_GetPtr(&bigbufferseg,compressed);\r
1980                         MM_SetLock (&bigbufferseg,true);\r
1981                         source = bigbufferseg;\r
1982                 }\r
1983 \r
1984                 CA_FarRead(maphandle,(byte far *)source,compressed);\r
1985 #ifdef MAPHEADERLINKED\r
1986                 //\r
1987                 // unhuffman, then unRLEW\r
1988                 // The huffman'd chunk has a two byte expanded length first\r
1989                 // The resulting RLEW chunk also does, even though it's not really\r
1990                 // needed\r
1991                 //\r
1992                 expanded = *source;\r
1993                 source++;\r
1994                 MM_GetPtr (&buffer2seg,expanded);\r
1995                 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);\r
1996                 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,\r
1997                 ((mapfiletype _seg *)tinf)->RLEWtag);\r
1998                 MM_FreePtr (&buffer2seg);\r
1999 \r
2000 #else\r
2001                 //\r
2002                 // unRLEW, skipping expanded length\r
2003                 //\r
2004                 CA_RLEWexpand (source+1, *dest,size,\r
2005                 ((mapfiletype _seg *)tinf)->RLEWtag);\r
2006 #endif\r
2007 \r
2008                 if (compressed>BUFFERSIZE)\r
2009                         MM_FreePtr(&bigbufferseg);\r
2010         }\r
2011 }//*/\r
2012 \r
2013 //===========================================================================\r
2014 \r
2015 /*\r
2016 ======================\r
2017 =\r
2018 = CA_UpLevel\r
2019 =\r
2020 = Goes up a bit level in the needed lists and clears it out.\r
2021 = Everything is made purgable\r
2022 =\r
2023 ======================\r
2024 */\r
2025 \r
2026 void CA_UpLevel (global_game_variables_t *gvar)\r
2027 {\r
2028         if (gvar->ca.ca_levelnum==7)\r
2029                 printf("CA_UpLevel: Up past level 7!");\r
2030 \r
2031         gvar->ca.ca_levelbit<<=1;\r
2032         gvar->ca.ca_levelnum++;\r
2033 }\r
2034 \r
2035 //===========================================================================\r
2036 \r
2037 /*\r
2038 ======================\r
2039 =\r
2040 = CA_DownLevel\r
2041 =\r
2042 = Goes down a bit level in the needed lists and recaches\r
2043 = everything from the lower level\r
2044 =\r
2045 ======================\r
2046 */\r
2047 \r
2048 void CA_DownLevel (global_game_variables_t *gvar)\r
2049 {\r
2050         if (!gvar->ca.ca_levelnum)\r
2051                 printf("CA_DownLevel: Down past level 0!");\r
2052         gvar->ca.ca_levelbit>>=1;\r
2053         gvar->ca.ca_levelnum--;\r
2054         ////++++++++++++++++++++++++++++++++++++++++++CA_CacheMarks(NULL);\r
2055 }\r
2056 \r
2057 //===========================================================================\r
2058 \r
2059 /*\r
2060 ======================\r
2061 =\r
2062 = CA_ClearMarks\r
2063 =\r
2064 = Clears out all the marks at the current level\r
2065 =\r
2066 ======================\r
2067 */\r
2068 \r
2069 void CA_ClearMarks (global_game_variables_t *gvar)\r
2070 {\r
2071         int i;\r
2072 \r
2073         for (i=0;i<NUMCHUNKS;i++)\r
2074                 gvar->ca.grneeded[i]&=~gvar->ca.ca_levelbit;\r
2075 }\r
2076 \r
2077 //===========================================================================\r
2078 \r
2079 /*\r
2080 ======================\r
2081 =\r
2082 = CA_ClearAllMarks\r
2083 =\r
2084 = Clears out all the marks on all the levels\r
2085 =\r
2086 ======================\r
2087 */\r
2088 \r
2089 void CA_ClearAllMarks (global_game_variables_t *gvar)\r
2090 {\r
2091         _fmemset (gvar->ca.grneeded,0,sizeof(gvar->ca.grneeded));\r
2092         gvar->ca.ca_levelbit = 1;\r
2093         gvar->ca.ca_levelnum = 0;\r
2094 }\r
2095 \r
2096 //===========================================================================\r
2097 \r
2098 /*\r
2099 ======================\r
2100 =\r
2101 = CA_FreeGraphics\r
2102 =\r
2103 ======================\r
2104 */\r
2105 \r
2106 void CA_SetGrPurge (global_game_variables_t *gvar)\r
2107 {\r
2108         int i;\r
2109 \r
2110 //\r
2111 // free graphics\r
2112 //\r
2113         CA_ClearMarks (gvar);\r
2114 \r
2115         for (i=0;i<NUMCHUNKS;i++)\r
2116                 if (gvar->ca.grsegs[i])\r
2117                         MM_SetPurge (gvar->ca.grsegs[i],3, gvar);\r
2118 }\r
2119 \r
2120 \r
2121 /*\r
2122 ======================\r
2123 =\r
2124 = CA_SetAllPurge\r
2125 =\r
2126 = Make everything possible purgable\r
2127 =\r
2128 ======================\r
2129 */\r
2130 \r
2131 void CA_SetAllPurge (global_game_variables_t *gvar)\r
2132 {\r
2133         int i;\r
2134 \r
2135         CA_ClearMarks (gvar);\r
2136 \r
2137 //\r
2138 // free cursor sprite and background save\r
2139 //\r
2140         //____VW_FreeCursor ();\r
2141 \r
2142 //\r
2143 // free map headers and map planes\r
2144 //\r
2145 //      for (i=0;i<NUMMAPS;i++)\r
2146 //              if (gvar->ca.camap.mapheaderseg[i])\r
2147 //                      MM_SetPurge (gvar->ca.camap.mapheaderseg[i],3, gvar);\r
2148 \r
2149         for (i=0;i<3;i++)\r
2150                 if (gvar->ca.mapsegs[i])\r
2151                         MM_FreePtr ((memptr *)&gvar->ca.mapsegs[i], gvar);\r
2152 \r
2153 //\r
2154 // free sounds\r
2155 //\r
2156         for (i=0;i<NUMSNDCHUNKS;i++)\r
2157                 if (gvar->ca.audiosegs[i])\r
2158                         MM_SetPurge ((memptr *)&gvar->ca.audiosegs[i],3, gvar);\r
2159 \r
2160 //\r
2161 // free graphics\r
2162 //\r
2163         CA_SetGrPurge (gvar);\r
2164 }\r
2165 \r
2166 \r
2167 //===========================================================================\r
2168 \r
2169 \r
2170 /*\r
2171 ======================\r
2172 =\r
2173 = CAL_DialogDraw\r
2174 =\r
2175 ======================\r
2176 */\r
2177 /*\r
2178 #define NUMBARS (17l*8)\r
2179 #define BARSTEP 8\r
2180 \r
2181 unsigned        thx,thy,lastx;\r
2182 long            barx,barstep;\r
2183 \r
2184 void    CAL_DialogDraw (char *title,unsigned numcache)\r
2185 {\r
2186         unsigned        homex,homey,x;\r
2187 \r
2188         barstep = (NUMBARS<<16)/numcache;\r
2189 \r
2190 //\r
2191 // draw dialog window (masked tiles 12 - 20 are window borders)\r
2192 //\r
2193         US_CenterWindow (20,8);\r
2194         homex = PrintX;\r
2195         homey = PrintY;\r
2196 \r
2197         US_CPrint ("Loading");\r
2198         fontcolor = F_SECONDCOLOR;\r
2199         US_CPrint (title);\r
2200         fontcolor = F_BLACK;\r
2201 \r
2202 //\r
2203 // draw thermometer bar\r
2204 //\r
2205         thx = homex + 8;\r
2206         thy = homey + 32;\r
2207         VWB_DrawTile8(thx,thy,0);               // CAT3D numbers\r
2208         VWB_DrawTile8(thx,thy+8,3);\r
2209         VWB_DrawTile8(thx,thy+16,6);\r
2210         VWB_DrawTile8(thx+17*8,thy,2);\r
2211         VWB_DrawTile8(thx+17*8,thy+8,5);\r
2212         VWB_DrawTile8(thx+17*8,thy+16,8);\r
2213         for (x=thx+8;x<thx+17*8;x+=8)\r
2214         {\r
2215                 VWB_DrawTile8(x,thy,1);\r
2216                 VWB_DrawTile8(x,thy+8,4);\r
2217                 VWB_DrawTile8(x,thy+16,7);\r
2218         }\r
2219 \r
2220         thx += 4;               // first line location\r
2221         thy += 5;\r
2222         barx = (long)thx<<16;\r
2223         lastx = thx;\r
2224 \r
2225         VW_UpdateScreen();\r
2226 }\r
2227 */\r
2228 \r
2229 /*\r
2230 ======================\r
2231 =\r
2232 = CAL_DialogUpdate\r
2233 =\r
2234 ======================\r
2235 */\r
2236 /*\r
2237 void    CAL_DialogUpdate (void)\r
2238 {\r
2239         unsigned        x,xh;\r
2240 \r
2241         barx+=barstep;\r
2242         xh = barx>>16;\r
2243         if (xh - lastx > BARSTEP)\r
2244         {\r
2245                 for (x=lastx;x<=xh;x++)\r
2246 #if GRMODE == EGAGR\r
2247                         VWB_Vlin (thy,thy+13,x,14);\r
2248 #endif\r
2249 #if GRMODE == CGAGR\r
2250                         VWB_Vlin (thy,thy+13,x,SECONDCOLOR);\r
2251 #endif\r
2252                 lastx = xh;\r
2253                 VW_UpdateScreen();\r
2254         }\r
2255 }*/\r
2256 \r
2257 /*\r
2258 ======================\r
2259 =\r
2260 = CAL_DialogFinish\r
2261 =\r
2262 ======================\r
2263 */\r
2264 /*\r
2265 void    CAL_DialogFinish (void)\r
2266 {\r
2267         unsigned        x,xh;\r
2268 \r
2269         xh = thx + NUMBARS;\r
2270         for (x=lastx;x<=xh;x++)\r
2271 #if GRMODE == EGAGR\r
2272                 VWB_Vlin (thy,thy+13,x,14);\r
2273 #endif\r
2274 #if GRMODE == CGAGR\r
2275                 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);\r
2276 #endif\r
2277         VW_UpdateScreen();\r
2278 \r
2279 }*/\r
2280 \r
2281 //===========================================================================\r
2282 \r
2283 /*\r
2284 ======================\r
2285 =\r
2286 = CA_CacheMarks\r
2287 =\r
2288 ======================\r
2289 *//*++++\r
2290 #define MAXEMPTYREAD    1024\r
2291 \r
2292 void CAL_CacheMarks (char *title, global_game_variables_t *gvar)\r
2293 {\r
2294         boolean dialog;\r
2295         int     i,next,numcache;\r
2296         long    pos,endpos,nextpos,nextendpos,compressed;\r
2297         long    bufferstart,bufferend;  // file position of general buffer\r
2298         byte    far *source;\r
2299         memptr  bigbufferseg;\r
2300 \r
2301         dialog = (title!=NULL);\r
2302 \r
2303         numcache = 0;\r
2304 //\r
2305 // go through and make everything not needed purgable\r
2306 //\r
2307         for (i=0;i<NUMCHUNKS;i++)\r
2308                 if (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit))//if (grneeded[i]&ca_levelbit)\r
2309                 {\r
2310                         if (gvar->ca.grsegs[i])                                 // its allready in memory, make\r
2311                                 MM_SetPurge(gvar->ca.grsegs[i],0,gvar); // sure it stays there!\r
2312                         else\r
2313                                 numcache++;\r
2314                 }\r
2315                 else\r
2316                 {\r
2317                         if (gvar->ca.grsegs[i])                                 // not needed, so make it purgeable\r
2318                                 MM_SetPurge(gvar->ca.grsegs[i],3,gvar);\r
2319                 }\r
2320 \r
2321         if (!numcache)                  // nothing to cache!\r
2322                 return;\r
2323 \r
2324 // MDM begin - (GAMERS EDGE)\r
2325 //\r
2326 //      if (!FindFile("EGAGRAPH.16",NULL,2))\r
2327 //              Quit (gvar, "CA_CacheMarks(): Can't find graphics files.");\r
2328 //\r
2329 // MDM end\r
2330 \r
2331         if (dialog)\r
2332         {\r
2333 #ifdef PROFILE\r
2334                 write(profilehandle,title,strlen(title));\r
2335                 write(profilehandle,"\n",1);\r
2336 #endif\r
2337                 if (drawcachebox)\r
2338                         drawcachebox(title,numcache);\r
2339         }\r
2340 \r
2341 //\r
2342 // go through and load in anything still needed\r
2343 //\r
2344         bufferstart = bufferend = 0;            // nothing good in buffer now\r
2345 \r
2346         for (i=0;i<NUMCHUNKS;i++)\r
2347                 if ( (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit)) && !gvar->ca.grsegs[i])\r
2348                 {\r
2349 //\r
2350 // update thermometer\r
2351 //\r
2352                         if (dialog && updatecachebox)\r
2353                                 updatecachebox ();\r
2354 \r
2355                         pos = GRFILEPOS(i);\r
2356                         if (pos<0)\r
2357                                 continue;\r
2358 \r
2359                         next = i +1;\r
2360                         while (GRFILEPOS(next) == -1)           // skip past any sparse tiles\r
2361                                 next++;\r
2362 \r
2363                         compressed = GRFILEPOS(next)-pos;\r
2364                         endpos = pos+compressed;\r
2365 \r
2366                         if (compressed<=BUFFERSIZE)\r
2367                         {\r
2368                                 if (bufferstart<=pos\r
2369                                 && bufferend>= endpos)\r
2370                                 {\r
2371                                 // data is allready in buffer\r
2372                                         source = (byte _seg *)bufferseg+(pos-bufferstart);\r
2373                                 }\r
2374                                 else\r
2375                                 {\r
2376                                 // load buffer with a new block from disk\r
2377                                 // try to get as many of the needed blocks in as possible\r
2378                                         while ( next < NUMCHUNKS )\r
2379                                         {\r
2380                                                 while (next < NUMCHUNKS &&\r
2381                                                 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))\r
2382                                                         next++;\r
2383                                                 if (next == NUMCHUNKS)\r
2384                                                         continue;\r
2385 \r
2386                                                 nextpos = GRFILEPOS(next);\r
2387                                                 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles\r
2388                                                         ;\r
2389                                                 nextendpos = GRFILEPOS(next);\r
2390                                                 if (nextpos - endpos <= MAXEMPTYREAD\r
2391                                                 && nextendpos-pos <= BUFFERSIZE)\r
2392                                                         endpos = nextendpos;\r
2393                                                 else\r
2394                                                         next = NUMCHUNKS;                       // read pos to posend\r
2395                                         }\r
2396 \r
2397                                         lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
2398                                         CA_FarRead(gvar->ca.file.grhandle,(gvar->mm.bufferseg),endpos-pos,gvar);\r
2399                                         bufferstart = pos;\r
2400                                         bufferend = endpos;\r
2401                                         source = bufferseg;\r
2402                                 }\r
2403                         }\r
2404                         else\r
2405                         {\r
2406                         // big chunk, allocate temporary buffer\r
2407                                 MM_GetPtr(&bigbufferseg,compressed,gvar);\r
2408                                 if (mmerror)\r
2409                                         return;\r
2410                                 MM_SetLock (&bigbufferseg,true);\r
2411                                 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);\r
2412                                 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed,gvar);\r
2413                                 source = bigbufferseg;\r
2414                         }\r
2415 \r
2416                         CAL_ExpandGrChunk (i,source);\r
2417                         if (mmerror)\r
2418                                 return;\r
2419 \r
2420                         if (compressed>BUFFERSIZE)\r
2421                                 MM_FreePtr(&bigbufferseg);\r
2422 \r
2423                 }\r
2424 \r
2425 //\r
2426 // finish up any thermometer remnants\r
2427 //\r
2428                 if (dialog && finishcachebox)\r
2429                         finishcachebox();\r
2430 }*/\r
2431 \r
2432 void CA_CannotOpen(char *string, global_game_variables_t *gvar)\r
2433 {\r
2434  char str[30];\r
2435 \r
2436  strcpy(str,"Can't open ");\r
2437  strcat(str,string);\r
2438  strcat(str,"!\n");\r
2439  Quit (gvar, str);\r
2440 }\r