1 /* Catacomb Apocalypse Source Code
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2 * Copyright (C) 1993-2014 Flat Rock Software
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; either version 2 of the License, or
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7 * (at your option) any later version.
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9 * This program is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 * GNU General Public License for more details.
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14 * You should have received a copy of the GNU General Public License along
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15 * with this program; if not, write to the Free Software Foundation, Inc.,
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16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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22 =============================================================================
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24 Id Software Caching Manager
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25 ---------------------------
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27 Must be started BEFORE the memory manager, because it needs to get the headers
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28 loaded into the data segment
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30 =============================================================================
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33 #include "src/lib/16_ca.h"
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39 //#define THREEBYTEGRSTARTS
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40 //https://github.com/open-watcom/open-watcom-v2/issues/279#issuecomment-244587566 for _seg
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41 //http://www.shikadi.net/moddingwiki/GameMaps_Format for info on the code
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43 =============================================================================
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47 =============================================================================
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52 word bit0,bit1; // 0-255 is a character, > is a pointer to a node
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59 long headeroffsets[100];
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65 =============================================================================
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69 =============================================================================
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75 unsigned _seg *mapsegs[3];
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76 maptype _seg *mapheaderseg[NUMMAPS];
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77 byte _seg *audiosegs[NUMSNDCHUNKS];
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78 void _seg *grsegs[NUMCHUNKS];
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80 byte far grneeded[NUMCHUNKS];*/
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82 void (*drawcachebox) (char *title, unsigned numcache);
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83 void (*updatecachebox) (void);
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84 void (*finishcachebox) (void);
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87 =============================================================================
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91 =============================================================================
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94 /*extern long far CGAhead;
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95 extern long far EGAhead;
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96 extern byte CGAdict;
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97 extern byte EGAdict;
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98 extern byte far maphead;
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99 extern byte mapdict;
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100 extern byte far audiohead;
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101 extern byte audiodict;
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104 long _seg *grstarts; // array of offsets in egagraph, -1 for sparse
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105 long _seg *audiostarts; // array of offsets in audio / audiot
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107 #ifdef GRHEADERLINKED
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108 huffnode *grhuffman;
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110 huffnode grhuffman[255];
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113 #ifdef AUDIOHEADERLINKED
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114 huffnode *audiohuffman;
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116 huffnode audiohuffman[255];
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120 int grhandle; // handle to EGAGRAPH
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121 int maphandle; // handle to MAPTEMP / GAMEMAPS
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122 int audiohandle; // handle to AUDIOT / AUDIO
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124 long chunkcomplen,chunkexplen;
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126 SDMode oldsoundmode;
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130 void CAL_DialogDraw (char *title,unsigned numcache);
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131 void CAL_DialogUpdate (void);
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132 void CAL_DialogFinish (void);*/
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133 //void CAL_CarmackExpand (unsigned far *source, unsigned far *dest,unsigned length);
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136 #ifdef THREEBYTEGRSTARTS
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137 #define FILEPOSSIZE 3
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138 //#define GRFILEPOS(c) (*(long far *)(((byte far *)grstarts)+(c)*3)&0xffffff)
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139 long GRFILEPOS(int c, global_game_variables_t *gvar)
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146 value = *(long far *)(((byte far *)gvar->ca.grstarts)+offset);
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148 value &= 0x00ffffffl;
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150 if (value == 0xffffffl)
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156 #define FILEPOSSIZE 4
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157 #define GRFILEPOS(c) (gvar->ca.grstarts[c])
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161 =============================================================================
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165 =============================================================================
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169 ============================
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171 = CA_OpenDebug / CA_CloseDebug
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173 = Opens a binary file with the handle "debughandle"
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175 ============================
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177 void CA_OpenDebug(global_game_variables_t *gvar)
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179 #ifdef __BORLANDC__
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180 unlink("debug.16b");
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181 gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);
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184 unlink("debug.16w");
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185 gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);
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189 void CA_CloseDebug(global_game_variables_t *gvar)
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191 close(gvar->handle.debughandle);
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197 ============================
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199 = CAL_GetGrChunkLength
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201 = Gets the length of an explicit length chunk (not tiles)
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202 = The file pointer is positioned so the compressed data can be read in next.
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204 ============================
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207 void CAL_GetGrChunkLength (int chunk)
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209 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
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210 read(grhandle,&chunkexplen,sizeof(chunkexplen));
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211 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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216 ==========================
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220 = Read from a file to a far pointer
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222 ==========================
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225 boolean CA_FarRead(int handle, byte far *dest, dword length, global_game_variables_t *gvar)
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230 if(gvar->pm.emm.EMSVer<0x40)
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231 if(length>0xfffflu)
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233 printf("File is a fat bakapee\n");
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234 //segm=(length%0xfffflu)-1;
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235 //fat=segm*0xfffflu;
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237 printf("CA_FarRead doesn't support 64K reads yet!\n");
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238 return 0;//TODO: EXPAND!!!
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246 mov cx,[WORD PTR length]
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247 mov dx,[WORD PTR dest]
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248 mov ds,[WORD PTR dest+2]
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249 mov ah,0x3f // READ w/handle
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256 #ifdef __BORLANDC__
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260 #ifdef __BORLANDC__
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263 cmp ax,[WORD PTR length]
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265 // errno = EINVFMT; // user manager knows this is bad read
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268 #ifdef __BORLANDC__
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272 #ifdef __BORLANDC__
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276 #ifdef __BORLANDC__
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288 ==========================
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292 = Write from a file to a far pointer
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294 ==========================
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297 boolean CA_FarWrite(int handle, byte far *source, dword length, global_game_variables_t *gvar)
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302 if(gvar->pm.emm.EMSVer<0x40)
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303 if(length>0xfffflu)
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305 printf("File is a fat bakapee\n");
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306 //segm=(length%0xfffflu)-1;
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307 //fat=segm*0xfffflu;
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309 printf("CA_FarWrite doesn't support 64K reads yet!\n");
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318 mov cx,[WORD PTR length]
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319 mov dx,[WORD PTR source]
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320 mov ds,[WORD PTR source+2]
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321 mov ah,0x40 // WRITE w/handle
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328 #ifdef __BORLANDC__
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332 #ifdef __BORLANDC__
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335 cmp ax,[WORD PTR length]
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337 // errno = ENOMEM; // user manager knows this is bad write
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340 #ifdef __BORLANDC__
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344 #ifdef __BORLANDC__
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348 #ifdef __BORLANDC__
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360 ==========================
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364 = Reads a file into an allready allocated buffer
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366 ==========================
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369 boolean CA_ReadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)
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375 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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378 size = filelength(handle);
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379 #ifdef __DEBUG_CA__
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381 printf("===============================================================================\n");
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382 printf(" CA_ReadFile\n");
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383 printf("===============================================================================\n");
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385 printf(" ptr=%Fp\n", ptr);
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386 printf(" *ptr=%Fp\n", *ptr);
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387 printf(" &ptr=%Fp\n", &ptr);
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390 if(!CA_FarRead(handle,*ptr,size, gvar))
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401 ==========================
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405 = Writes a file from a memory buffer
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407 ==========================
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410 boolean CA_WriteFile (char *filename, void far *ptr, long length, global_game_variables_t *gvar)
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416 handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,
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417 S_IREAD | S_IWRITE | S_IFREG);
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422 if (!CA_FarWrite (handle,ptr,length, gvar))
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434 ==========================
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438 = Allocate space for and load a file
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440 ==========================
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443 boolean CA_LoadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)
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449 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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452 size = filelength(handle);
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453 #ifdef __DEBUG_CA__
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455 printf("===============================================================================\n");
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456 printf(" CA_LoadFile\n");
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457 printf("===============================================================================\n");
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459 printf(" ptr=%Fp\n", ptr);
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460 printf(" *ptr=%Fp\n", *ptr);
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461 printf(" &ptr=%Fp\n", &ptr);
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464 MM_GetPtr(ptr,size, gvar);
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465 #ifdef __DEBUG_CA__
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468 printf("---------------------------------------\n");
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469 printf(" ptr=%Fp\n", ptr);
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470 printf(" *ptr=%Fp\n", *ptr);
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471 printf(" &ptr=%Fp\n", &ptr);
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472 printf("-------------------------------------------------------------------------------\n");
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475 if(!CA_FarRead(handle,*ptr,size, gvar))
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485 ============================================================================
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487 COMPRESSION routines, see JHUFF.C for more
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489 ============================================================================
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497 = CAL_OptimizeNodes
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499 = Goes through a huffman table and changes the 256-511 node numbers to the
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500 = actular address of the node. Must be called before CAL_HuffExpand
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505 void CAL_OptimizeNodes(huffnode *table)
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512 for (i=0;i<255;i++)
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514 if (node->bit0 >= 256)
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515 node->bit0 = (unsigned)(table+(node->bit0-256));
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516 if (node->bit1 >= 256)
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517 node->bit1 = (unsigned)(table+(node->bit1-256));
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525 ======================
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529 = Length is the length of the EXPANDED data
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531 ======================
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534 void CAL_HuffExpand (byte far *source, byte far *dest,
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535 long length,huffnode *hufftable)
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537 // unsigned bit,byte,node,code;
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538 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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540 // huffnode *nodeon;
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542 headptr = hufftable+254; // head node is allways node 254
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544 source++; // normalize
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549 sourceseg = FP_SEG(source);
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550 sourceoff = FP_OFF(source);
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551 destseg = FP_SEG(dest);
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552 destoff = FP_OFF(dest);
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553 endoff = destoff+length;
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558 // ss:bx node pointer
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561 if (length <0xfff0)
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564 //--------------------------
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565 // expand less than 64k of data
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566 //--------------------------
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569 mov bx,[word ptr headptr]
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577 mov ch,[si] // load first byte
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580 #ifdef __BORLANDC__
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584 #ifdef __BORLANDC__
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587 test ch,cl // bit set?
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589 mov dx,[ss:bx] // take bit0 path from node
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590 shl cl,1 // advance to next bit position
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593 #ifdef __BORLANDC__
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597 #ifdef __BORLANDC__
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600 mov dx,[ss:bx+2] // take bit1 path
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601 shl cl,1 // advance to next bit position
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603 #ifdef __BORLANDC__
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607 #ifdef __BORLANDC__
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610 mov ch,[si] // load next byte
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612 mov cl,1 // back to first bit
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613 #ifdef __BORLANDC__
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617 #ifdef __BORLANDC__
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620 or dh,dh // if dx<256 its a byte, else move node
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622 mov bx,dx // next node = (huffnode *)code
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624 #ifdef __BORLANDC__
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628 #ifdef __BORLANDC__
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632 inc di // write a decopmpressed byte out
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633 mov bx,[word ptr headptr] // back to the head node for next bit
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642 //--------------------------
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643 // expand more than 64k of data
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644 //--------------------------
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649 mov bx,[word ptr headptr]
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657 lodsb // load first byte
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658 #ifdef __BORLANDC__
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662 #ifdef __BORLANDC__
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665 test al,cl // bit set?
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667 mov dx,[ss:bx] // take bit0 path from node
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669 #ifdef __BORLANDC__
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673 #ifdef __BORLANDC__
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676 mov dx,[ss:bx+2] // take bit1 path
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677 #ifdef __BORLANDC__
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681 #ifdef __BORLANDC__
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684 shl cl,1 // advance to next bit position
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687 cmp si,0x10 // normalize ds:si
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693 #ifdef __BORLANDC__
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697 #ifdef __BORLANDC__
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700 mov cl,1 // back to first bit
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701 #ifdef __BORLANDC__
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705 #ifdef __BORLANDC__
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708 or dh,dh // if dx<256 its a byte, else move node
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710 mov bx,dx // next node = (huffnode *)code
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712 #ifdef __BORLANDC__
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716 #ifdef __BORLANDC__
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720 inc di // write a decopmpressed byte out
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721 mov bx,[word ptr headptr] // back to the head node for next bit
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723 cmp di,0x10 // normalize es:di
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729 #ifdef __BORLANDC__
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733 #ifdef __BORLANDC__
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736 sub [WORD PTR ss:length],1
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738 dec [WORD PTR ss:length+2]
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739 jns expand // when length = ffff ffff, done
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752 ======================
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754 = CAL_CarmackExpand
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756 = Length is the length of the EXPANDED data
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758 ======================
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761 #define NEARTAG 0xa7
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762 #define FARTAG 0xa8
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764 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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766 unsigned ch,chhigh,count,offset;
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767 unsigned far *copyptr, far *inptr, far *outptr;
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778 if (chhigh == NEARTAG)
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782 { // have to insert a word containing the tag byte
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783 ch |= *(/*(unsigned char far *)*/inptr)++;
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789 offset = *(/*(unsigned char far *)*/inptr)++;
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790 copyptr = outptr - offset;
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793 *outptr++ = *copyptr++;
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796 else if (chhigh == FARTAG)
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800 { // have to insert a word containing the tag byte
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801 ch |= *(/*(unsigned char far *)*/inptr)++;
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808 copyptr = dest + offset;
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811 *outptr++ = *copyptr++;
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824 ======================
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828 ======================
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831 long CA_RLEWCompress (unsigned far *source, long length, unsigned far *dest,
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835 unsigned value,count,i;
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836 unsigned far *start,far *end;
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840 end = source + (length+1)/2;
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849 while (*source == value && source<end)
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854 if (count>3 || value == rlewtag)
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857 // send a tag / count / value string
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866 // send word without compressing
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868 for (i=1;i<=count;i++)
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872 } while (source<end);
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874 complength = 2*(dest-start);
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880 ======================
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883 = length is EXPANDED length
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885 ======================
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888 void CA_RLEWexpand (unsigned far *source, unsigned far *dest,long length,
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891 // unsigned value,count,i;
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893 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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903 if (value != rlewtag)
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911 // compressed string
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915 for (i=1;i<=count;i++)
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918 } while (dest<end);
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921 end = dest + (length)/2;
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922 sourceseg = FP_SEG(source);
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923 sourceoff = FP_OFF(source);
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924 destseg = FP_SEG(dest);
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925 destoff = FP_OFF(dest);
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926 endseg = FP_SEG(end);
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927 endoff = FP_OFF(end);
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931 // ax = source value
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933 // cx = repeat counts
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936 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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944 #ifdef __BORLANDC__
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948 #ifdef __BORLANDC__
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956 #ifdef __BORLANDC__
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960 #ifdef __BORLANDC__
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964 mov cx,ax // repeat count
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965 lodsw // repeat value
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967 #ifdef __BORLANDC__
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971 #ifdef __BORLANDC__
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974 cmp si,0x10 // normalize ds:si
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985 #ifdef __BORLANDC__
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989 #ifdef __BORLANDC__
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992 cmp di,0x10 // normalize es:di
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1003 #ifdef __BORLANDC__
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1007 #ifdef __BORLANDC__
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1023 =============================================================================
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1025 CACHE MANAGER ROUTINES
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1027 =============================================================================
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1031 ======================
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1035 ======================
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1038 /*void CAL_SetupGrFile (void)
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1043 #ifdef GRHEADERLINKED
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1045 #if GRMODE == EGAGR
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1046 grhuffman = (huffnode *)&EGAdict;
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1047 grstarts = (long _seg *)FP_SEG(&EGAhead);
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1049 #if GRMODE == CGAGR
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1050 grhuffman = (huffnode *)&CGAdict;
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1051 grstarts = (long _seg *)FP_SEG(&CGAhead);
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1054 CAL_OptimizeNodes (grhuffman);
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1059 // load ???dict.ext (huffman dictionary for graphics files)
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1062 if ((handle = open(GREXT"DICT."EXT,
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1063 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1064 Quit (gvar, "Can't open "GREXT"DICT."EXT"!");
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1066 read(handle, &grhuffman, sizeof(grhuffman));
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1068 CAL_OptimizeNodes (grhuffman);
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1070 // load the data offsets from ???head.ext
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1072 MM_GetPtr (MEMPTR grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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1074 if ((handle = open(GREXT"HEAD."EXT,
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1075 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1076 Quit (gvar, "Can't open "GREXT"HEAD."EXT"!");
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1078 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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1086 // Open the graphics file, leaving it open until the game is finished
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1088 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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1089 if (grhandle == -1)
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1090 Quit (gvar, "Cannot open "GREXT"GRAPH."EXT"!");
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1094 // load the pic and sprite headers into the arrays in the data segment
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1097 MM_GetPtr(MEMPTR pictable,NUMPICS*sizeof(pictabletype));
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1098 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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1099 MM_GetPtr(&compseg,chunkcomplen);
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1100 CA_FarRead (grhandle,compseg,chunkcomplen);
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1101 CAL_HuffExpand (compseg, (byte far *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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1102 MM_FreePtr(&compseg);
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1106 MM_GetPtr(MEMPTR picmtable,NUMPICM*sizeof(pictabletype));
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1107 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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1108 MM_GetPtr(&compseg,chunkcomplen);
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1109 CA_FarRead (grhandle,compseg,chunkcomplen);
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1110 CAL_HuffExpand (compseg, (byte far *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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1111 MM_FreePtr(&compseg);
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1115 MM_GetPtr(MEMPTR spritetable,NUMSPRITES*sizeof(spritetabletype));
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1116 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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1117 MM_GetPtr(&compseg,chunkcomplen);
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1118 CA_FarRead (grhandle,compseg,chunkcomplen);
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1119 CAL_HuffExpand (compseg, (byte far *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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1120 MM_FreePtr(&compseg);
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1125 //==========================================================================
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1129 ======================
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1131 = CAL_SetupMapFile
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1133 ======================
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1136 void CAL_SetupMapFile (global_game_variables_t *gvar)
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1138 #ifndef MAPHEADERLINKED
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1144 // load maphead.ext (offsets and tileinfo for map file)
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1146 #ifndef MAPHEADERLINKED
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1147 if ((handle = open("maphead.mph",
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1148 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1149 Quit (gvar, "Can't open maphead.mph");
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1150 length = filelength(handle);
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1151 MM_GetPtr (MEMPTR gvar->ca.tinf,length,gvar);
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1152 CA_FarRead(handle, gvar->ca.tinf, length,gvar);
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1156 gvar->ca.tinf = (byte _seg *)FP_SEG(&maphead);
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1161 // open the data file
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1163 //TODO: multiple files
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1164 if ((gvar->ca.file.maphandle = open("data/test.map",
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1165 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1166 Quit (gvar, "Can't open data/test.map!");
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1167 /*#ifdef MAPHEADERLINKED
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1168 if ((maphandle = open("GAMEMAPS."EXTENSION,
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1169 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1170 Quit ("Can't open GAMEMAPS."EXTENSION"!");
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1172 if ((maphandle = open("MAPTEMP."EXTENSION,
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1173 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1174 Quit ("Can't open MAPTEMP."EXTENSION"!");
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1178 //==========================================================================
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1182 ======================
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1184 = CAL_SetupAudioFile
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1186 ======================
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1189 /*void CAL_SetupAudioFile (void)
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1195 // load maphead.ext (offsets and tileinfo for map file)
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1197 #ifndef AUDIOHEADERLINKED
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1198 if ((handle = open("AUDIOHED."EXT,
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1199 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1200 Quit (gvar, "Can't open AUDIOHED."EXT"!");
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1201 length = filelength(handle);
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1202 MM_GetPtr (MEMPTR audiostarts,length);
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1203 CA_FarRead(handle, (byte far *)audiostarts, length);
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1206 audiohuffman = (huffnode *)&audiodict;
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1207 CAL_OptimizeNodes (audiohuffman);
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1208 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1212 // open the data file
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1214 #ifndef AUDIOHEADERLINKED
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1215 if ((audiohandle = open("AUDIOT."EXT,
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1216 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1217 Quit (gvar, "Can't open AUDIOT."EXT"!");
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1219 if ((audiohandle = open("AUDIO."EXT,
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1220 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1221 Quit (gvar, "Can't open AUDIO."EXT"!");
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1225 //==========================================================================
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1229 ======================
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1233 = Open all files and load in headers
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1235 ======================
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1238 void CA_Startup(global_game_variables_t *gvar)
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1241 #ifdef __BORLANDC__
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1242 unlink("profile.16b");
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1243 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
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1245 #ifdef __WATCOMC__
\r
1246 unlink("profile.16w");
\r
1247 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
\r
1251 #ifdef __BORLANDC__
\r
1252 unlink("meminfo.16b");
\r
1253 gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);
\r
1255 #ifdef __WATCOMC__
\r
1256 unlink("meminfo.16w");
\r
1257 gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);
\r
1262 CAL_SetupMapFile (gvar);
\r
1264 #ifndef NOGRAPHICS
\r
1265 CAL_SetupGrFile (gvar);
\r
1268 CAL_SetupMapFile (gvar);
\r
1271 gvar->ca.camap.mapon = -1;
\r
1272 gvar->ca.ca_levelbit = 1;
\r
1273 gvar->ca.ca_levelnum = 0;
\r
1275 /* drawcachebox = CAL_DialogDraw;
\r
1276 updatecachebox = CAL_DialogUpdate;
\r
1277 finishcachebox = CAL_DialogFinish;*/
\r
1280 //==========================================================================
\r
1284 ======================
\r
1288 = Closes all files
\r
1290 ======================
\r
1293 void CA_Shutdown(global_game_variables_t *gvar)
\r
1296 close(gvar->handle.profilehandle);
\r
1298 close(gvar->handle.showmemhandle);
\r
1300 close(gvar->ca.file.maphandle);
\r
1301 close(gvar->ca.file.grhandle);
\r
1302 close(gvar->ca.file.audiohandle);
\r
1305 //===========================================================================
\r
1308 ======================
\r
1310 = CA_CacheAudioChunk
\r
1312 ======================
\r
1315 void CA_CacheAudioChunk (int chunk)
\r
1317 long pos,compressed;
\r
1318 #ifdef AUDIOHEADERLINKED
\r
1320 memptr bigbufferseg;
\r
1324 if (audiosegs[chunk])
\r
1326 MM_SetPurge (MEMPTR audiosegs[chunk],0);
\r
1327 return; // allready in memory
\r
1330 // MDM begin - (GAMERS EDGE)
\r
1332 if (!FindFile("AUDIO."EXT,NULL,2))
\r
1333 Quit (gvar, "CA_CacheAudioChunk(): Can't find audio files.");
\r
1338 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1339 // a larger buffer
\r
1341 pos = audiostarts[chunk];
\r
1342 compressed = audiostarts[chunk+1]-pos;
\r
1344 lseek(audiohandle,pos,SEEK_SET);
\r
1346 #ifndef AUDIOHEADERLINKED
\r
1348 MM_GetPtr (MEMPTR audiosegs[chunk],compressed);
\r
1352 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1356 if (compressed<=BUFFERSIZE)
\r
1358 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1359 source = bufferseg;
\r
1363 MM_GetPtr(&bigbufferseg,compressed);
\r
1366 MM_SetLock (&bigbufferseg,true);
\r
1367 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1368 source = bigbufferseg;
\r
1371 expanded = *(long far *)source;
\r
1372 source += 4; // skip over length
\r
1373 MM_GetPtr (MEMPTR audiosegs[chunk],expanded);
\r
1376 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1379 if (compressed>BUFFERSIZE)
\r
1380 MM_FreePtr(&bigbufferseg);
\r
1384 //===========================================================================
\r
1387 ======================
\r
1389 = CA_LoadAllSounds
\r
1391 = Purges all sounds, then loads all new ones (mode switch)
\r
1393 ======================
\r
1396 void CA_LoadAllSounds (void)
\r
1400 switch (oldsoundmode)
\r
1405 start = STARTPCSOUNDS;
\r
1408 start = STARTADLIBSOUNDS;
\r
1412 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1413 if (audiosegs[start])
\r
1414 MM_SetPurge (MEMPTR audiosegs[start],3); // make purgable
\r
1418 switch (SoundMode)
\r
1423 start = STARTPCSOUNDS;
\r
1426 start = STARTADLIBSOUNDS;
\r
1430 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1431 CA_CacheAudioChunk (start);
\r
1433 oldsoundmode = SoundMode;
\r
1436 //===========================================================================
\r
1438 //????#if GRMODE == EGAGR
\r
1442 ======================
\r
1446 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1448 ======================
\r
1451 unsigned static sheight,swidth;
\r
1452 boolean static dothemask;
\r
1454 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1455 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1458 sheight = height; // because we are going to reassign bp
\r
1460 dothemask = domask;
\r
1464 mov ds,ax // source and dest are in same segment, and all local
\r
1471 mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1473 cmp [ss:dothemask],0
\r
1477 // table shift the mask
\r
1479 mov dx,[ss:sheight]
\r
1480 #ifdef __BORLANDC__
\r
1484 #ifdef __BORLANDC__
\r
1487 mov BYTE PTR [di],255 // 0xff first byte
\r
1488 mov cx,ss:[swidth]
\r
1489 #ifdef __BORLANDC__
\r
1493 #ifdef __BORLANDC__
\r
1496 mov al,[bx] // source
\r
1498 inc bx // next source byte
\r
1502 mov ax,[bp+si] // table shift into two bytes
\r
1504 and [di],al // and with first byte
\r
1506 mov [di],ah // replace next byte
\r
1510 inc di // the last shifted byte has 1s in it
\r
1513 #ifdef __BORLANDC__
\r
1517 #ifdef __BORLANDC__
\r
1521 // table shift the data
\r
1523 mov dx,ss:[sheight]
\r
1525 shl dx,1 // four planes of data
\r
1526 #ifdef __BORLANDC__
\r
1530 #ifdef __BORLANDC__
\r
1533 mov BYTE PTR [di],0 // 0 first byte
\r
1534 mov cx,ss:[swidth]
\r
1535 #ifdef __BORLANDC__
\r
1539 #ifdef __BORLANDC__
\r
1542 mov al,[bx] // source
\r
1543 inc bx // next source byte
\r
1547 mov ax,[bp+si] // table shift into two bytes
\r
1548 or [di],al // or with first byte
\r
1550 mov [di],ah // replace next byte
\r
1554 inc di // the last shifted byte has 0s in it
\r
1562 mov ax,ss // restore data segment
\r
1570 //===========================================================================
\r
1573 ======================
\r
1577 = Generate shifts and set up sprite structure for a given sprite
\r
1579 ======================
\r
1582 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1585 unsigned shiftstarts[5];
\r
1586 unsigned smallplane,bigplane,expanded;
\r
1587 spritetabletype far *spr;
\r
1588 spritetype _seg *dest;
\r
1590 #if GRMODE == CGAGR
\r
1592 // CGA has no pel panning, so shifts are never needed
\r
1594 spr = &spritetable[chunk-STARTSPRITES];
\r
1595 smallplane = spr->width*spr->height;
\r
1596 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1599 dest = (spritetype _seg *)grsegs[chunk];
\r
1600 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1601 dest->planesize[0] = smallplane;
\r
1602 dest->width[0] = spr->width;
\r
1605 // expand the unshifted shape
\r
1607 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1612 #if GRMODE == EGAGR
\r
1615 // calculate sizes
\r
1617 spr = &spritetable[chunk-STARTSPRITES];
\r
1618 smallplane = spr->width*spr->height;
\r
1619 bigplane = (spr->width+1)*spr->height;
\r
1621 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1622 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1623 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1624 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1625 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1627 expanded = shiftstarts[spr->shifts];
\r
1628 MM_GetPtr (&grsegs[chunk],expanded);
\r
1631 dest = (spritetype _seg *)grsegs[chunk];
\r
1634 // expand the unshifted shape
\r
1636 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1639 // make the shifts!
\r
1641 switch (spr->shifts)
\r
1646 dest->sourceoffset[i] = shiftstarts[0];
\r
1647 dest->planesize[i] = smallplane;
\r
1648 dest->width[i] = spr->width;
\r
1655 dest->sourceoffset[i] = shiftstarts[0];
\r
1656 dest->planesize[i] = smallplane;
\r
1657 dest->width[i] = spr->width;
\r
1661 dest->sourceoffset[i] = shiftstarts[1];
\r
1662 dest->planesize[i] = bigplane;
\r
1663 dest->width[i] = spr->width+1;
\r
1665 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1666 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1670 dest->sourceoffset[0] = shiftstarts[0];
\r
1671 dest->planesize[0] = smallplane;
\r
1672 dest->width[0] = spr->width;
\r
1674 dest->sourceoffset[1] = shiftstarts[1];
\r
1675 dest->planesize[1] = bigplane;
\r
1676 dest->width[1] = spr->width+1;
\r
1677 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1678 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1680 dest->sourceoffset[2] = shiftstarts[2];
\r
1681 dest->planesize[2] = bigplane;
\r
1682 dest->width[2] = spr->width+1;
\r
1683 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1684 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1686 dest->sourceoffset[3] = shiftstarts[3];
\r
1687 dest->planesize[3] = bigplane;
\r
1688 dest->width[3] = spr->width+1;
\r
1689 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1690 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1695 Quit (gvar, "CAL_CacheSprite: Bad shifts number!");
\r
1701 //===========================================================================
\r
1705 ======================
\r
1707 = CAL_ExpandGrChunk
\r
1709 = Does whatever is needed with a pointer to a compressed chunk
\r
1711 ======================
\r
1714 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1719 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1722 // expanded sizes of tile8/16/32 are implicit
\r
1725 #if GRMODE == EGAGR
\r
1727 #define MASKBLOCK 40
\r
1730 #if GRMODE == CGAGR
\r
1732 #define MASKBLOCK 32
\r
1735 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1736 expanded = BLOCK*NUMTILE8;
\r
1737 else if (chunk<STARTTILE16)
\r
1738 expanded = MASKBLOCK*NUMTILE8M;
\r
1739 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1740 expanded = BLOCK*4;
\r
1741 else if (chunk<STARTTILE32)
\r
1742 expanded = MASKBLOCK*4;
\r
1743 else if (chunk<STARTTILE32M)
\r
1744 expanded = BLOCK*16;
\r
1746 expanded = MASKBLOCK*16;
\r
1751 // everything else has an explicit size longword
\r
1753 expanded = *(long far *)source;
\r
1754 source += 4; // skip over length
\r
1758 // allocate final space, decompress it, and free bigbuffer
\r
1759 // Sprites need to have shifts made and various other junk
\r
1761 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1762 CAL_CacheSprite(chunk,source);
\r
1765 MM_GetPtr (&grsegs[chunk],expanded);
\r
1768 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1774 ======================
\r
1778 = Gets a chunk off disk, optimizing reads to general buffer
\r
1780 ======================
\r
1783 void CAL_ReadGrChunk (int chunk)
\r
1785 long pos,compressed;
\r
1786 memptr bigbufferseg;
\r
1791 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1792 // a larger buffer
\r
1794 pos = GRFILEPOS(chunk);
\r
1795 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1799 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1802 compressed = GRFILEPOS(next)-pos;
\r
1804 lseek(grhandle,pos,SEEK_SET);
\r
1806 if (compressed<=BUFFERSIZE)
\r
1808 CA_FarRead(grhandle,bufferseg,compressed);
\r
1809 source = bufferseg;
\r
1813 MM_GetPtr(&bigbufferseg,compressed);
\r
1816 MM_SetLock (&bigbufferseg,true);
\r
1817 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1818 source = bigbufferseg;
\r
1821 CAL_ExpandGrChunk (chunk,source);
\r
1823 if (compressed>BUFFERSIZE)
\r
1824 MM_FreePtr(&bigbufferseg);
\r
1828 ======================
\r
1832 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1834 ======================
\r
1837 void CA_CacheGrChunk (int chunk)
\r
1839 long pos,compressed;
\r
1840 memptr bigbufferseg;
\r
1844 gvar->ca.grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1845 if (grsegs[chunk])
\r
1847 MM_SetPurge (&grsegs[chunk],0);
\r
1848 return; // allready in memory
\r
1851 // MDM begin - (GAMERS EDGE)
\r
1853 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1854 Quit (gvar, "CA_CacheGrChunk(): Can't find graphics files.");
\r
1859 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1860 // a larger buffer
\r
1862 pos = GRFILEPOS(chunk);
\r
1863 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1867 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1870 compressed = GRFILEPOS(next)-pos;
\r
1872 lseek(grhandle,pos,SEEK_SET);
\r
1874 if (compressed<=BUFFERSIZE)
\r
1876 CA_FarRead(grhandle,bufferseg,compressed);
\r
1877 source = bufferseg;
\r
1881 MM_GetPtr(&bigbufferseg,compressed);
\r
1882 MM_SetLock (&bigbufferseg,true);
\r
1883 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1884 source = bigbufferseg;
\r
1887 CAL_ExpandGrChunk (chunk,source);
\r
1889 if (compressed>BUFFERSIZE)
\r
1890 MM_FreePtr(&bigbufferseg);
\r
1895 //==========================================================================
\r
1898 ======================
\r
1902 ======================
\r
1905 void CA_CacheMap (global_game_variables_t *gvar)
\r
1907 long pos,compressed;
\r
1909 memptr *dest,bigbufferseg;
\r
1911 unsigned far *source;
\r
1912 #ifdef MAPHEADERLINKED
\r
1913 memptr buffer2seg;
\r
1919 // free up memory from last map
\r
1921 if (gvar->ca.camap.mapon>-1 && gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapon])
\r
1922 MM_SetPurge (((memptr)gvar->ca.camap.mapheaderseg[(gvar->ca.camap.mapon)]), 3, gvar);
\r
1923 for (plane=0;plane<MAPPLANES;plane++)
\r
1924 if (gvar->ca.camap.mapsegs[plane])
\r
1925 MM_FreePtr ((memptr)gvar->ca.camap.mapsegs[plane], gvar);
\r
1927 gvar->ca.camap.mapon = gvar->ca.camap.mapnum;
\r
1931 // load map header
\r
1932 // The header will be cached if it is still around
\r
1934 // if (!gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapnum])
\r
1936 // //pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1937 // //pos = ((_seg *)gvar->ca.camap.tinf)->headeroffsets[gvar->ca.camap.mapnum];
\r
1938 // pos = ((memptr)gvar->ca.camap.tinf)->headeroffsets[gvar->ca.camap.mapnum];
\r
1939 // if (pos<0) // $FFFFFFFF start is a sparse map
\r
1940 // printf("CA_CacheMap: Tried to load a non existent map!");
\r
1942 // MM_GetPtr(MEMPTR gvar->ca.camapheaderseg[mapnum],sizeof(maptype));
\r
1943 // lseek(maphandle,pos,SEEK_SET);
\r
1944 // CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1947 // MM_SetPurge (MEMPTR mapheaderseg[mapnum], 0, &(gvar->mm));
\r
1950 // load the planes in
\r
1951 // If a plane's pointer still exists it will be overwritten (levels are
\r
1952 // allways reloaded, never cached)
\r
1955 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1957 for (plane = 0; plane<MAPPLANES; plane++)
\r
1959 //pos = mapheaderseg[mapnum]->planestart[plane];
\r
1960 //compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1963 continue; // the plane is not used in this game
\r
1965 dest = MEMPTR mapsegs[plane];
\r
1966 MM_GetPtr(dest,size);
\r
1968 lseek(maphandle,pos,SEEK_SET);
\r
1969 if (compressed<=BUFFERSIZE)
\r
1970 source = bufferseg;
\r
1973 MM_GetPtr(&bigbufferseg,compressed);
\r
1974 MM_SetLock (&bigbufferseg,true);
\r
1975 source = bigbufferseg;
\r
1978 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1979 #ifdef MAPHEADERLINKED
\r
1981 // unhuffman, then unRLEW
\r
1982 // The huffman'd chunk has a two byte expanded length first
\r
1983 // The resulting RLEW chunk also does, even though it's not really
\r
1986 expanded = *source;
\r
1988 MM_GetPtr (&buffer2seg,expanded);
\r
1989 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1990 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1991 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1992 MM_FreePtr (&buffer2seg);
\r
1996 // unRLEW, skipping expanded length
\r
1998 CA_RLEWexpand (source+1, *dest,size,
\r
1999 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
2002 if (compressed>BUFFERSIZE)
\r
2003 MM_FreePtr(&bigbufferseg);
\r
2007 //===========================================================================
\r
2010 ======================
\r
2014 = Goes up a bit level in the needed lists and clears it out.
\r
2015 = Everything is made purgable
\r
2017 ======================
\r
2020 void CA_UpLevel (global_game_variables_t *gvar)
\r
2022 if (gvar->ca.ca_levelnum==7)
\r
2023 printf("CA_UpLevel: Up past level 7!");
\r
2025 gvar->ca.ca_levelbit<<=1;
\r
2026 gvar->ca.ca_levelnum++;
\r
2029 //===========================================================================
\r
2032 ======================
\r
2036 = Goes down a bit level in the needed lists and recaches
\r
2037 = everything from the lower level
\r
2039 ======================
\r
2042 void CA_DownLevel (global_game_variables_t *gvar)
\r
2044 if (!gvar->ca.ca_levelnum)
\r
2045 printf("CA_DownLevel: Down past level 0!");
\r
2046 gvar->ca.ca_levelbit>>=1;
\r
2047 gvar->ca.ca_levelnum--;
\r
2048 ////++++++++++++++++++++++++++++++++++++++++++CA_CacheMarks(NULL);
\r
2051 //===========================================================================
\r
2054 ======================
\r
2058 = Clears out all the marks at the current level
\r
2060 ======================
\r
2063 void CA_ClearMarks (global_game_variables_t *gvar)
\r
2067 for (i=0;i<NUMCHUNKS;i++)
\r
2068 gvar->ca.grneeded[i]&=~gvar->ca.ca_levelbit;
\r
2071 //===========================================================================
\r
2074 ======================
\r
2076 = CA_ClearAllMarks
\r
2078 = Clears out all the marks on all the levels
\r
2080 ======================
\r
2083 void CA_ClearAllMarks (global_game_variables_t *gvar)
\r
2085 _fmemset (gvar->ca.grneeded,0,sizeof(gvar->ca.grneeded));
\r
2086 gvar->ca.ca_levelbit = 1;
\r
2087 gvar->ca.ca_levelnum = 0;
\r
2090 //===========================================================================
\r
2093 ======================
\r
2097 ======================
\r
2100 void CA_SetGrPurge (global_game_variables_t *gvar)
\r
2107 CA_ClearMarks (gvar);
\r
2109 for (i=0;i<NUMCHUNKS;i++)
\r
2110 if (gvar->ca.grsegs[i])
\r
2111 MM_SetPurge (gvar->ca.grsegs[i],3, gvar);
\r
2116 ======================
\r
2120 = Make everything possible purgable
\r
2122 ======================
\r
2125 void CA_SetAllPurge (global_game_variables_t *gvar)
\r
2129 CA_ClearMarks (gvar);
\r
2132 // free cursor sprite and background save
\r
2134 //____VW_FreeCursor ();
\r
2137 // free map headers and map planes
\r
2139 // for (i=0;i<NUMMAPS;i++)
\r
2140 // if (gvar->ca.camap.mapheaderseg[i])
\r
2141 // MM_SetPurge (gvar->ca.camap.mapheaderseg[i],3, gvar);
\r
2144 if (gvar->ca.mapsegs[i])
\r
2145 MM_FreePtr ((memptr *)&gvar->ca.mapsegs[i], gvar);
\r
2150 for (i=0;i<NUMSNDCHUNKS;i++)
\r
2151 if (gvar->ca.audiosegs[i])
\r
2152 MM_SetPurge ((memptr *)&gvar->ca.audiosegs[i],3, gvar);
\r
2157 CA_SetGrPurge (gvar);
\r
2161 //===========================================================================
\r
2165 ======================
\r
2169 ======================
\r
2172 #define NUMBARS (17l*8)
\r
2175 unsigned thx,thy,lastx;
\r
2176 long barx,barstep;
\r
2178 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2180 unsigned homex,homey,x;
\r
2182 barstep = (NUMBARS<<16)/numcache;
\r
2185 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2187 US_CenterWindow (20,8);
\r
2191 US_CPrint ("Loading");
\r
2192 fontcolor = F_SECONDCOLOR;
\r
2193 US_CPrint (title);
\r
2194 fontcolor = F_BLACK;
\r
2197 // draw thermometer bar
\r
2201 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2202 VWB_DrawTile8(thx,thy+8,3);
\r
2203 VWB_DrawTile8(thx,thy+16,6);
\r
2204 VWB_DrawTile8(thx+17*8,thy,2);
\r
2205 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2206 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2207 for (x=thx+8;x<thx+17*8;x+=8)
\r
2209 VWB_DrawTile8(x,thy,1);
\r
2210 VWB_DrawTile8(x,thy+8,4);
\r
2211 VWB_DrawTile8(x,thy+16,7);
\r
2214 thx += 4; // first line location
\r
2216 barx = (long)thx<<16;
\r
2219 VW_UpdateScreen();
\r
2224 ======================
\r
2226 = CAL_DialogUpdate
\r
2228 ======================
\r
2231 void CAL_DialogUpdate (void)
\r
2237 if (xh - lastx > BARSTEP)
\r
2239 for (x=lastx;x<=xh;x++)
\r
2240 #if GRMODE == EGAGR
\r
2241 VWB_Vlin (thy,thy+13,x,14);
\r
2243 #if GRMODE == CGAGR
\r
2244 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2247 VW_UpdateScreen();
\r
2252 ======================
\r
2254 = CAL_DialogFinish
\r
2256 ======================
\r
2259 void CAL_DialogFinish (void)
\r
2263 xh = thx + NUMBARS;
\r
2264 for (x=lastx;x<=xh;x++)
\r
2265 #if GRMODE == EGAGR
\r
2266 VWB_Vlin (thy,thy+13,x,14);
\r
2268 #if GRMODE == CGAGR
\r
2269 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2271 VW_UpdateScreen();
\r
2275 //===========================================================================
\r
2278 ======================
\r
2282 ======================
\r
2284 #define MAXEMPTYREAD 1024
\r
2286 void CAL_CacheMarks (char *title, global_game_variables_t *gvar)
\r
2289 int i,next,numcache;
\r
2290 long pos,endpos,nextpos,nextendpos,compressed;
\r
2291 long bufferstart,bufferend; // file position of general buffer
\r
2293 memptr bigbufferseg;
\r
2295 dialog = (title!=NULL);
\r
2299 // go through and make everything not needed purgable
\r
2301 for (i=0;i<NUMCHUNKS;i++)
\r
2302 if (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit))//if (grneeded[i]&ca_levelbit)
\r
2304 if (gvar->ca.grsegs[i]) // its allready in memory, make
\r
2305 MM_SetPurge(gvar->ca.grsegs[i],0,gvar); // sure it stays there!
\r
2311 if (gvar->ca.grsegs[i]) // not needed, so make it purgeable
\r
2312 MM_SetPurge(gvar->ca.grsegs[i],3,gvar);
\r
2315 if (!numcache) // nothing to cache!
\r
2318 // MDM begin - (GAMERS EDGE)
\r
2320 // if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2321 // Quit (gvar, "CA_CacheMarks(): Can't find graphics files.");
\r
2328 write(profilehandle,title,strlen(title));
\r
2329 write(profilehandle,"\n",1);
\r
2332 drawcachebox(title,numcache);
\r
2336 // go through and load in anything still needed
\r
2338 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2340 for (i=0;i<NUMCHUNKS;i++)
\r
2341 if ( (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit)) && !gvar->ca.grsegs[i])
\r
2344 // update thermometer
\r
2346 if (dialog && updatecachebox)
\r
2347 updatecachebox ();
\r
2349 pos = GRFILEPOS(i);
\r
2354 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2357 compressed = GRFILEPOS(next)-pos;
\r
2358 endpos = pos+compressed;
\r
2360 if (compressed<=BUFFERSIZE)
\r
2362 if (bufferstart<=pos
\r
2363 && bufferend>= endpos)
\r
2365 // data is allready in buffer
\r
2366 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2370 // load buffer with a new block from disk
\r
2371 // try to get as many of the needed blocks in as possible
\r
2372 while ( next < NUMCHUNKS )
\r
2374 while (next < NUMCHUNKS &&
\r
2375 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2377 if (next == NUMCHUNKS)
\r
2380 nextpos = GRFILEPOS(next);
\r
2381 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2383 nextendpos = GRFILEPOS(next);
\r
2384 if (nextpos - endpos <= MAXEMPTYREAD
\r
2385 && nextendpos-pos <= BUFFERSIZE)
\r
2386 endpos = nextendpos;
\r
2388 next = NUMCHUNKS; // read pos to posend
\r
2391 lseek(grhandle,pos,SEEK_SET);
\r
2392 CA_FarRead(grhandle,(gvar->mm.bufferseg),endpos-pos,gvar);
\r
2393 bufferstart = pos;
\r
2394 bufferend = endpos;
\r
2395 source = bufferseg;
\r
2400 // big chunk, allocate temporary buffer
\r
2401 MM_GetPtr(&bigbufferseg,compressed,gvar);
\r
2404 MM_SetLock (&bigbufferseg,true);
\r
2405 lseek(grhandle,pos,SEEK_SET);
\r
2406 CA_FarRead(grhandle,bigbufferseg,compressed,gvar);
\r
2407 source = bigbufferseg;
\r
2410 CAL_ExpandGrChunk (i,source);
\r
2414 if (compressed>BUFFERSIZE)
\r
2415 MM_FreePtr(&bigbufferseg);
\r
2420 // finish up any thermometer remnants
\r
2422 if (dialog && finishcachebox)
\r