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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103 void CA_CannotOpen(char *string, global_game_variables_t *gvar);
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105 /*long _seg *grstarts; // array of offsets in egagraph, -1 for sparse
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106 long _seg *audiostarts; // array of offsets in audio / audiot
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108 #ifdef GRHEADERLINKED
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109 huffnode *gvar->ca.grhuffman;
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111 huffnode gvar->ca.grhuffman[255];
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114 #ifdef AUDIOHEADERLINKED
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115 huffnode *audiohuffman;
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117 huffnode audiohuffman[255];
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121 int grhandle; // handle to EGAGRAPH
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122 int maphandle; // handle to MAPTEMP / GAMEMAPS
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123 int audiohandle; // handle to AUDIOT / AUDIO
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125 long c hunkcomplen,c hunkexplen;
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127 SDMode oldsoundmode;
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131 void CAL_DialogDraw (char *title,unsigned numcache);
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132 void CAL_DialogUpdate (void);
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133 void CAL_DialogFinish (void);*/
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134 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest,
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138 #ifdef THREEBYTEGRSTARTS
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139 #define FILEPOSSIZE 3
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140 //#define GRFILEPOS(c) (*(long far *)(((byte far *)grstarts)+(c)*3)&0xffffff)
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141 long GRFILEPOS(int c, global_game_variables_t *gvar)
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148 value = *(long far *)(((byte far *)gvar->ca.grstarts)+offset);
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150 value &= 0x00ffffffl;
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152 if (value == 0xffffffl)
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158 #define FILEPOSSIZE 4
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159 #define GRFILEPOS(c) (gvar->ca.grstarts[c])
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163 =============================================================================
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167 =============================================================================
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171 ============================
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173 = CA_OpenDebug / CA_CloseDebug
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175 = Opens a binary file with the handle "debughandle"
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177 ============================
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179 void CA_OpenDebug(global_game_variables_t *gvar)
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181 #ifdef __BORLANDC__
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182 unlink("debug.16b");
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183 gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);
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186 unlink("debug.16w");
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187 gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);
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191 void CA_CloseDebug(global_game_variables_t *gvar)
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193 close(gvar->handle.debughandle);
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199 ============================
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201 = CAL_GetGrChunkLength
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203 = Gets the length of an explicit length chunk (not tiles)
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204 = The file pointer is positioned so the compressed data can be read in next.
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206 ============================
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209 void CAL_GetGrChunkLength (int chunk)
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211 lseek(gvar->ca.file.grhandle,GRFILEPOS(chunk),SEEK_SET);
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212 read(gvar->ca.file.grhandle,&gvar->ca.chunkexplen,sizeof(gvar->ca.chunkexplen));
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213 gvar->ca.chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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218 ==========================
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222 = Read from a file to a far pointer
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224 ==========================
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227 boolean CA_FarRead(int handle, byte far *dest, dword length, global_game_variables_t *gvar)
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232 if(gvar->pm.emm.EMSVer<0x40)
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233 if(length>0xfffflu)
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235 printf("File is a fat bakapee\n");
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236 //segm=(length%0xfffflu)-1;
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237 //fat=segm*0xfffflu;
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239 printf("CA_FarRead doesn't support 64K reads yet!\n");
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240 return 0;//TODO: EXPAND!!!
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248 mov cx,[WORD PTR length]
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249 mov dx,[WORD PTR dest]
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250 mov ds,[WORD PTR dest+2]
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251 mov ah,0x3f // READ w/handle
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258 #ifdef __BORLANDC__
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262 #ifdef __BORLANDC__
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265 cmp ax,[WORD PTR length]
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267 // errno = EINVFMT; // user manager knows this is bad read
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270 #ifdef __BORLANDC__
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274 #ifdef __BORLANDC__
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278 #ifdef __BORLANDC__
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290 ==========================
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294 = Write from a file to a far pointer
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296 ==========================
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299 boolean CA_FarWrite(int handle, byte far *source, dword length, global_game_variables_t *gvar)
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304 if(gvar->pm.emm.EMSVer<0x40)
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305 if(length>0xfffflu)
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307 printf("File is a fat bakapee\n");
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308 //segm=(length%0xfffflu)-1;
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309 //fat=segm*0xfffflu;
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311 printf("CA_FarWrite doesn't support 64K reads yet!\n");
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320 mov cx,[WORD PTR length]
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321 mov dx,[WORD PTR source]
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322 mov ds,[WORD PTR source+2]
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323 mov ah,0x40 // WRITE w/handle
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330 #ifdef __BORLANDC__
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334 #ifdef __BORLANDC__
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337 cmp ax,[WORD PTR length]
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339 // errno = ENOMEM; // user manager knows this is bad write
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342 #ifdef __BORLANDC__
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346 #ifdef __BORLANDC__
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350 #ifdef __BORLANDC__
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362 ==========================
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366 = Reads a file into an allready allocated buffer
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368 ==========================
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371 boolean CA_ReadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)
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377 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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380 size = filelength(handle);
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381 #ifdef __DEBUG_CA__
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383 printf("===============================================================================\n");
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384 printf(" CA_ReadFile\n");
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385 printf("===============================================================================\n");
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387 printf(" ptr=%Fp\n", ptr);
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388 printf(" *ptr=%Fp\n", *ptr);
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389 printf(" &ptr=%Fp\n", &ptr);
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392 if(!CA_FarRead(handle,*ptr,size, gvar))
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403 ==========================
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407 = Writes a file from a memory buffer
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409 ==========================
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412 boolean CA_WriteFile (char *filename, void far *ptr, long length, global_game_variables_t *gvar)
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418 handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,
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419 S_IREAD | S_IWRITE | S_IFREG);
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424 if (!CA_FarWrite (handle,ptr,length, gvar))
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436 ==========================
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440 = Allocate space for and load a file
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442 ==========================
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445 boolean CA_LoadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)
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451 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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454 size = filelength(handle);
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455 #ifdef __DEBUG_CA__
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457 printf("===============================================================================\n");
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458 printf(" CA_LoadFile\n");
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459 printf("===============================================================================\n");
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461 printf(" ptr=%Fp\n", ptr);
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462 printf(" *ptr=%Fp\n", *ptr);
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463 printf(" &ptr=%Fp\n", &ptr);
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466 MM_GetPtr(ptr,size, gvar);
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467 #ifdef __DEBUG_CA__
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470 printf("---------------------------------------\n");
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471 printf(" ptr=%Fp\n", ptr);
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472 printf(" *ptr=%Fp\n", *ptr);
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473 printf(" &ptr=%Fp\n", &ptr);
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474 printf("-------------------------------------------------------------------------------\n");
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477 if(!CA_FarRead(handle,*ptr,size, gvar))
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487 ============================================================================
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489 COMPRESSION routines, see JHUFF.C for more
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491 ============================================================================
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499 = CAL_OptimizeNodes
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501 = Goes through a huffman table and changes the 256-511 node numbers to the
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502 = actular address of the node. Must be called before CAL_HuffExpand
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507 void CAL_OptimizeNodes(huffnode *table)
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514 for (i=0;i<255;i++)
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516 if (node->bit0 >= 256)
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517 node->bit0 = (unsigned)(table+(node->bit0-256));
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518 if (node->bit1 >= 256)
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519 node->bit1 = (unsigned)(table+(node->bit1-256));
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527 ======================
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531 = Length is the length of the EXPANDED data
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533 ======================
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536 void CAL_HuffExpand (byte far *source, byte far *dest,
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537 long length,huffnode *hufftable)
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539 // unsigned bit,byte,node,code;
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540 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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542 // huffnode *nodeon;
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544 headptr = hufftable+254; // head node is allways node 254
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546 source++; // normalize
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551 sourceseg = FP_SEG(source);
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552 sourceoff = FP_OFF(source);
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553 destseg = FP_SEG(dest);
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554 destoff = FP_OFF(dest);
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555 endoff = destoff+length;
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560 // ss:bx node pointer
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563 if (length <0xfff0)
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566 //--------------------------
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567 // expand less than 64k of data
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568 //--------------------------
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571 mov bx,[word ptr headptr]
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579 mov ch,[si] // load first byte
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582 #ifdef __BORLANDC__
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586 #ifdef __BORLANDC__
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589 test ch,cl // bit set?
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591 mov dx,[ss:bx] // take bit0 path from node
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592 shl cl,1 // advance to next bit position
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595 #ifdef __BORLANDC__
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599 #ifdef __BORLANDC__
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602 mov dx,[ss:bx+2] // take bit1 path
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603 shl cl,1 // advance to next bit position
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605 #ifdef __BORLANDC__
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609 #ifdef __BORLANDC__
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612 mov ch,[si] // load next byte
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614 mov cl,1 // back to first bit
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615 #ifdef __BORLANDC__
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619 #ifdef __BORLANDC__
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622 or dh,dh // if dx<256 its a byte, else move node
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624 mov bx,dx // next node = (huffnode *)code
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626 #ifdef __BORLANDC__
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630 #ifdef __BORLANDC__
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634 inc di // write a decopmpressed byte out
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635 mov bx,[word ptr headptr] // back to the head node for next bit
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644 //--------------------------
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645 // expand more than 64k of data
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646 //--------------------------
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651 mov bx,[word ptr headptr]
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659 lodsb // load first byte
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660 #ifdef __BORLANDC__
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664 #ifdef __BORLANDC__
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667 test al,cl // bit set?
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669 mov dx,[ss:bx] // take bit0 path from node
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671 #ifdef __BORLANDC__
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675 #ifdef __BORLANDC__
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678 mov dx,[ss:bx+2] // take bit1 path
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679 #ifdef __BORLANDC__
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683 #ifdef __BORLANDC__
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686 shl cl,1 // advance to next bit position
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689 cmp si,0x10 // normalize ds:si
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695 #ifdef __BORLANDC__
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699 #ifdef __BORLANDC__
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702 mov cl,1 // back to first bit
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703 #ifdef __BORLANDC__
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707 #ifdef __BORLANDC__
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710 or dh,dh // if dx<256 its a byte, else move node
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712 mov bx,dx // next node = (huffnode *)code
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714 #ifdef __BORLANDC__
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718 #ifdef __BORLANDC__
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722 inc di // write a decopmpressed byte out
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723 mov bx,[word ptr headptr] // back to the head node for next bit
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725 cmp di,0x10 // normalize es:di
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731 #ifdef __BORLANDC__
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735 #ifdef __BORLANDC__
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738 sub [WORD PTR ss:length],1
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740 dec [WORD PTR ss:length+2]
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741 jns expand // when length = ffff ffff, done
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754 ======================
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756 = CAL_CarmackExpand
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758 = Length is the length of the EXPANDED data
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760 ======================
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763 #define NEARTAG 0xa7
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764 #define FARTAG 0xa8
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766 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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768 unsigned ch,chhigh,count,offset;
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769 unsigned far *copyptr, far *inptr, far *outptr;
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780 if (chhigh == NEARTAG)
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784 { // have to insert a word containing the tag byte
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785 ch |= *(/*(unsigned char far *)*/inptr)++;
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791 offset = *(/*(unsigned char far *)*/inptr)++;
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792 copyptr = outptr - offset;
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795 *outptr++ = *copyptr++;
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798 else if (chhigh == FARTAG)
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802 { // have to insert a word containing the tag byte
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803 ch |= *(/*(unsigned char far *)*/inptr)++;
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810 copyptr = dest + offset;
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813 *outptr++ = *copyptr++;
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826 ======================
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830 ======================
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833 long CA_RLEWCompress (unsigned far *source, long length, unsigned far *dest,
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837 unsigned value,count,i;
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838 unsigned far *start,far *end;
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842 end = source + (length+1)/2;
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851 while (*source == value && source<end)
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856 if (count>3 || value == rlewtag)
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859 // send a tag / count / value string
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868 // send word without compressing
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870 for (i=1;i<=count;i++)
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874 } while (source<end);
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876 complength = 2*(dest-start);
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882 ======================
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885 = length is EXPANDED length
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887 ======================
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890 void CA_RLEWexpand (unsigned far *source, unsigned far *dest,long length,
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893 // unsigned value,count,i;
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895 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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905 if (value != rlewtag)
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913 // compressed string
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917 for (i=1;i<=count;i++)
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920 } while (dest<end);
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923 end = dest + (length)/2;
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924 sourceseg = FP_SEG(source);
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925 sourceoff = FP_OFF(source);
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926 destseg = FP_SEG(dest);
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927 destoff = FP_OFF(dest);
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928 endseg = FP_SEG(end);
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929 endoff = FP_OFF(end);
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933 // ax = source value
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935 // cx = repeat counts
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938 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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946 #ifdef __BORLANDC__
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950 #ifdef __BORLANDC__
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958 #ifdef __BORLANDC__
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962 #ifdef __BORLANDC__
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966 mov cx,ax // repeat count
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967 lodsw // repeat value
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969 #ifdef __BORLANDC__
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973 #ifdef __BORLANDC__
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976 cmp si,0x10 // normalize ds:si
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987 #ifdef __BORLANDC__
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991 #ifdef __BORLANDC__
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994 cmp di,0x10 // normalize es:di
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1005 #ifdef __BORLANDC__
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1009 #ifdef __BORLANDC__
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1025 =============================================================================
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1027 CACHE MANAGER ROUTINES
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1029 =============================================================================
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1033 ======================
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1037 ======================
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1039 ////++++TODO: enable!
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1040 /*void CAL_SetupGrFile (global_game_variables_t *gvar)
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1046 #ifdef GRHEADERLINKED
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1048 gvar->ca.grhuffman = (huffnode *)&VGAdict;
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1049 grstarts = (long _seg *)FP_SEG(&VGAhead);
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1051 CAL_OptimizeNodes (gvar->ca.grhuffman);
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1056 // load ???dict.ext (huffman dictionary for graphics files)
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1059 strcpy(fname,GDICTNAME);
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1060 strcat(fname,EXTENSION);
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1062 if ((handle = open(fname,
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1063 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1064 CA_CannotOpen(fname,gvar);
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1066 read(handle, &gvar->ca.grhuffman, sizeof(gvar->ca.grhuffman));
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1068 CAL_OptimizeNodes (gvar->ca.grhuffman);
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1070 // load the data offsets from ???head.ext
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1072 MM_GetPtr (MEMPTR gvar->ca.grstarts,(NUMCHUNKS+1)*FILEPOSSIZE, gvar);
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1074 strcpy(fname,GHEADNAME);
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1075 strcat(fname,EXTENSION);
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1077 if ((handle = open(fname,
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1078 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1079 CA_CannotOpen(fname,gvar);
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1081 CA_FarRead(handle, (memptr)gvar->ca.grstarts, (NUMCHUNKS+1)*FILEPOSSIZE, gvar);
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1089 // Open the graphics file, leaving it open until the game is finished
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1091 strcpy(fname,GFILENAME);
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1092 strcat(fname,EXTENSION);
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1094 gvar->ca.file.grhandle = open(fname, O_RDONLY | O_BINARY);
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1095 if (gvar->ca.file.grhandle == -1)
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1096 CA_CannotOpen(fname,gvar);
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1100 // load the pic and sprite headers into the arrays in the data segment
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1103 MM_GetPtr(MEMPTR pictable,NUMPICS*sizeof(pictabletype),gvar);
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1104 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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1105 MM_GetPtr(&compseg,gvar->ca.chunkcomplen, gvar);
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1106 CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen,gvar);
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1107 CAL_HuffExpand (compseg, (byte far *)pictable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);
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1108 MM_FreePtr(&compseg,gvar);
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1112 MM_GetPtr(MEMPTR picmtable,NUMPICM*sizeof(pictabletype));
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1113 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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1114 MM_GetPtr(&compseg,gvar->ca.chunkcomplen);
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1115 CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);
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1116 CAL_HuffExpand (compseg, (byte far *)picmtable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);
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1117 MM_FreePtr(&compseg);
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1121 MM_GetPtr(MEMPTR spritetable,NUMSPRITES*sizeof(spritetabletype));
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1122 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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1123 MM_GetPtr(&compseg,gvar->ca.chunkcomplen);
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1124 CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);
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1125 CAL_HuffExpand (compseg, (byte far *)spritetable,NUMSPRITES*sizeof(spritetabletype),gvar->ca.grhuffman);
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1126 MM_FreePtr(&compseg);
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1131 //==========================================================================
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1135 ======================
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1137 = CAL_SetupMapFile
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1139 ======================
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1142 void CAL_SetupMapFile (global_game_variables_t *gvar)
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1144 #ifndef MAPHEADERLINKED
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1150 // load maphead.ext (offsets and tileinfo for map file)
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1152 #ifndef MAPHEADERLINKED
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1153 if ((handle = open("maphead.mph",
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1154 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1155 Quit (gvar, "Can't open maphead.mph");
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1156 length = filelength(handle);
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1157 MM_GetPtr (MEMPTR gvar->ca.tinf,length,gvar);
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1158 CA_FarRead(handle, gvar->ca.tinf, length,gvar);
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1162 gvar->ca.tinf = (byte _seg *)FP_SEG(&maphead);
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1167 // open the data file
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1169 //TODO: multiple files
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1170 if ((gvar->ca.file.maphandle = open("data/test.map",
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1171 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1172 Quit (gvar, "Can't open data/test.map!");
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1173 /*#ifdef MAPHEADERLINKED
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1174 if ((maphandle = open("GAMEMAPS.16"ENSION,
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1175 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1176 Quit ("Can't open GAMEMAPS.16"ENSION"!");
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1178 if ((maphandle = open("MAPTEMP.16"ENSION,
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1179 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1180 Quit ("Can't open MAPTEMP.16"ENSION"!");
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1184 //==========================================================================
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1188 ======================
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1190 = CAL_SetupAudioFile
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1192 ======================
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1195 /*void CAL_SetupAudioFile (void)
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1201 // load maphead.ext (offsets and tileinfo for map file)
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1203 #ifndef AUDIOHEADERLINKED
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1204 if ((handle = open("AUDIOHED.16",
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1205 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1206 Quit (gvar, "Can't open AUDIOHED.16""!");
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1207 length = filelength(handle);
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1208 MM_GetPtr (MEMPTR audiostarts,length);
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1209 CA_FarRead(handle, (byte far *)audiostarts, length);
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1212 audiohuffman = (huffnode *)&audiodict;
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1213 CAL_OptimizeNodes (audiohuffman);
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1214 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1218 // open the data file
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1220 #ifndef AUDIOHEADERLINKED
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1221 if ((audiohandle = open("AUDIOT.16",
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1222 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1223 Quit (gvar, "Can't open AUDIOT.16""!");
\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
1231 //==========================================================================
\r
1235 ======================
\r
1239 = Open all files and load in headers
\r
1241 ======================
\r
1244 void CA_Startup(global_game_variables_t *gvar)
\r
1247 #ifdef __BORLANDC__
\r
1248 unlink("profile.16b");
\r
1249 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
\r
1251 #ifdef __WATCOMC__
\r
1252 unlink("profile.16w");
\r
1253 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
\r
1257 #ifdef __BORLANDC__
\r
1258 unlink("meminfo.16b");
\r
1259 gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);
\r
1261 #ifdef __WATCOMC__
\r
1262 unlink("meminfo.16w");
\r
1263 gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);
\r
1268 CAL_SetupMapFile (gvar);
\r
1270 #ifndef NOGRAPHICS
\r
1271 CAL_SetupGrFile (gvar);
\r
1274 CAL_SetupMapFile (gvar);
\r
1277 gvar->ca.camap.mapon = -1;
\r
1278 gvar->ca.ca_levelbit = 1;
\r
1279 gvar->ca.ca_levelnum = 0;
\r
1281 /* drawcachebox = CAL_DialogDraw;
\r
1282 updatecachebox = CAL_DialogUpdate;
\r
1283 finishcachebox = CAL_DialogFinish;*/
\r
1286 //==========================================================================
\r
1290 ======================
\r
1294 = Closes all files
\r
1296 ======================
\r
1299 void CA_Shutdown(global_game_variables_t *gvar)
\r
1302 close(gvar->handle.profilehandle);
\r
1304 close(gvar->handle.showmemhandle);
\r
1306 close(gvar->ca.file.maphandle);
\r
1307 close(gvar->ca.file.grhandle);
\r
1308 close(gvar->ca.file.audiohandle);
\r
1311 //===========================================================================
\r
1314 ======================
\r
1316 = CA_CacheAudioChunk
\r
1318 ======================
\r
1321 void CA_CacheAudioChunk (int chunk)
\r
1323 long pos,compressed;
\r
1324 #ifdef AUDIOHEADERLINKED
\r
1326 memptr bigbufferseg;
\r
1330 if (audiosegs[chunk])
\r
1332 MM_SetPurge (MEMPTR audiosegs[chunk],0);
\r
1333 return; // allready in memory
\r
1336 // MDM begin - (GAMERS EDGE)
\r
1338 if (!FindFile("AUDIO.16",NULL,2))
\r
1339 Quit (gvar, "CA_CacheAudioChunk(): Can't find audio files.");
\r
1344 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1345 // a larger buffer
\r
1347 pos = audiostarts[chunk];
\r
1348 compressed = audiostarts[chunk+1]-pos;
\r
1350 lseek(audiohandle,pos,SEEK_SET);
\r
1352 #ifndef AUDIOHEADERLINKED
\r
1354 MM_GetPtr (MEMPTR audiosegs[chunk],compressed);
\r
1358 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1362 if (compressed<=BUFFERSIZE)
\r
1364 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1365 source = bufferseg;
\r
1369 MM_GetPtr(&bigbufferseg,compressed);
\r
1372 MM_SetLock (&bigbufferseg,true);
\r
1373 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1374 source = bigbufferseg;
\r
1377 expanded = *(long far *)source;
\r
1378 source += 4; // skip over length
\r
1379 MM_GetPtr (MEMPTR audiosegs[chunk],expanded);
\r
1382 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1385 if (compressed>BUFFERSIZE)
\r
1386 MM_FreePtr(&bigbufferseg);
\r
1390 //===========================================================================
\r
1393 ======================
\r
1395 = CA_LoadAllSounds
\r
1397 = Purges all sounds, then loads all new ones (mode switch)
\r
1399 ======================
\r
1402 void CA_LoadAllSounds (void)
\r
1406 switch (oldsoundmode)
\r
1411 start = STARTPCSOUNDS;
\r
1414 start = STARTADLIBSOUNDS;
\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
1424 switch (SoundMode)
\r
1429 start = STARTPCSOUNDS;
\r
1432 start = STARTADLIBSOUNDS;
\r
1436 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1437 CA_CacheAudioChunk (start);
\r
1439 oldsoundmode = SoundMode;
\r
1442 //===========================================================================
\r
1444 //????#if GRMODE == EGAGR
\r
1448 ======================
\r
1452 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1454 ======================
\r
1457 unsigned static sheight,swidth;
\r
1458 boolean static dothemask;
\r
1460 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1461 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1464 sheight = height; // because we are going to reassign bp
\r
1466 dothemask = domask;
\r
1470 mov ds,ax // source and dest are in same segment, and all local
\r
1477 mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1479 cmp [ss:dothemask],0
\r
1483 // table shift the mask
\r
1485 mov dx,[ss:sheight]
\r
1486 #ifdef __BORLANDC__
\r
1490 #ifdef __BORLANDC__
\r
1493 mov BYTE PTR [di],255 // 0xff first byte
\r
1494 mov cx,ss:[swidth]
\r
1495 #ifdef __BORLANDC__
\r
1499 #ifdef __BORLANDC__
\r
1502 mov al,[bx] // source
\r
1504 inc bx // next source byte
\r
1508 mov ax,[bp+si] // table shift into two bytes
\r
1510 and [di],al // and with first byte
\r
1512 mov [di],ah // replace next byte
\r
1516 inc di // the last shifted byte has 1s in it
\r
1519 #ifdef __BORLANDC__
\r
1523 #ifdef __BORLANDC__
\r
1527 // table shift the data
\r
1529 mov dx,ss:[sheight]
\r
1531 shl dx,1 // four planes of data
\r
1532 #ifdef __BORLANDC__
\r
1536 #ifdef __BORLANDC__
\r
1539 mov BYTE PTR [di],0 // 0 first byte
\r
1540 mov cx,ss:[swidth]
\r
1541 #ifdef __BORLANDC__
\r
1545 #ifdef __BORLANDC__
\r
1548 mov al,[bx] // source
\r
1549 inc bx // next source byte
\r
1553 mov ax,[bp+si] // table shift into two bytes
\r
1554 or [di],al // or with first byte
\r
1556 mov [di],ah // replace next byte
\r
1560 inc di // the last shifted byte has 0s in it
\r
1568 mov ax,ss // restore data segment
\r
1576 //===========================================================================
\r
1579 ======================
\r
1583 = Generate shifts and set up sprite structure for a given sprite
\r
1585 ======================
\r
1588 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1591 unsigned shiftstarts[5];
\r
1592 unsigned smallplane,bigplane,expanded;
\r
1593 spritetabletype far *spr;
\r
1594 spritetype _seg *dest;
\r
1596 #if GRMODE == CGAGR
\r
1598 // CGA has no pel panning, so shifts are never needed
\r
1600 spr = &spritetable[chunk-STARTSPRITES];
\r
1601 smallplane = spr->width*spr->height;
\r
1602 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\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
1611 // expand the unshifted shape
\r
1613 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,gvar->ca.grhuffman);
\r
1618 #if GRMODE == EGAGR
\r
1621 // calculate sizes
\r
1623 spr = &spritetable[chunk-STARTSPRITES];
\r
1624 smallplane = spr->width*spr->height;
\r
1625 bigplane = (spr->width+1)*spr->height;
\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
1633 expanded = shiftstarts[spr->shifts];
\r
1634 MM_GetPtr (&grsegs[chunk],expanded);
\r
1637 dest = (spritetype _seg *)grsegs[chunk];
\r
1640 // expand the unshifted shape
\r
1642 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,gvar->ca.grhuffman);
\r
1645 // make the shifts!
\r
1647 switch (spr->shifts)
\r
1652 dest->sourceoffset[i] = shiftstarts[0];
\r
1653 dest->planesize[i] = smallplane;
\r
1654 dest->width[i] = spr->width;
\r
1661 dest->sourceoffset[i] = shiftstarts[0];
\r
1662 dest->planesize[i] = smallplane;
\r
1663 dest->width[i] = spr->width;
\r
1667 dest->sourceoffset[i] = shiftstarts[1];
\r
1668 dest->planesize[i] = bigplane;
\r
1669 dest->width[i] = spr->width+1;
\r
1671 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1672 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1676 dest->sourceoffset[0] = shiftstarts[0];
\r
1677 dest->planesize[0] = smallplane;
\r
1678 dest->width[0] = spr->width;
\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
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
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
1701 Quit (gvar, "CAL_CacheSprite: Bad shifts number!");
\r
1707 //===========================================================================
\r
1711 ======================
\r
1713 = CAL_ExpandGrChunk
\r
1715 = Does whatever is needed with a pointer to a compressed chunk
\r
1717 ======================
\r
1720 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1725 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1728 // expanded sizes of tile8/16/32 are implicit
\r
1731 #if GRMODE == EGAGR
\r
1733 #define MASKBLOCK 40
\r
1736 #if GRMODE == CGAGR
\r
1738 #define MASKBLOCK 32
\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
1752 expanded = MASKBLOCK*16;
\r
1757 // everything else has an explicit size longword
\r
1759 expanded = *(long far *)source;
\r
1760 source += 4; // skip over length
\r
1764 // allocate final space, decompress it, and free bigbuffer
\r
1765 // Sprites need to have shifts made and various other junk
\r
1767 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1768 CAL_CacheSprite(chunk,source);
\r
1771 MM_GetPtr (&grsegs[chunk],expanded);
\r
1774 CAL_HuffExpand (source,grsegs[chunk],expanded,gvar->ca.grhuffman);
\r
1780 ======================
\r
1784 = Gets a chunk off disk, optimizing reads to general buffer
\r
1786 ======================
\r
1789 void CAL_ReadGrChunk (int chunk)
\r
1791 long pos,compressed;
\r
1792 memptr bigbufferseg;
\r
1797 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1798 // a larger buffer
\r
1800 pos = GRFILEPOS(chunk);
\r
1801 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1805 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1808 compressed = GRFILEPOS(next)-pos;
\r
1810 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);
\r
1812 if (compressed<=BUFFERSIZE)
\r
1814 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);
\r
1815 source = bufferseg;
\r
1819 MM_GetPtr(&bigbufferseg,compressed);
\r
1822 MM_SetLock (&bigbufferseg,true);
\r
1823 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);
\r
1824 source = bigbufferseg;
\r
1827 CAL_ExpandGrChunk (chunk,source);
\r
1829 if (compressed>BUFFERSIZE)
\r
1830 MM_FreePtr(&bigbufferseg);
\r
1834 ======================
\r
1838 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1840 ======================
\r
1843 void CA_CacheGrChunk (int chunk)
\r
1845 long pos,compressed;
\r
1846 memptr bigbufferseg;
\r
1850 gvar->ca.grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1851 if (grsegs[chunk])
\r
1853 MM_SetPurge (&grsegs[chunk],0);
\r
1854 return; // allready in memory
\r
1857 // MDM begin - (GAMERS EDGE)
\r
1859 if (!FindFile("EGAGRAPH.16",NULL,2))
\r
1860 Quit (gvar, "CA_CacheGrChunk(): Can't find graphics files.");
\r
1865 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1866 // a larger buffer
\r
1868 pos = GRFILEPOS(chunk);
\r
1869 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1873 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1876 compressed = GRFILEPOS(next)-pos;
\r
1878 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);
\r
1880 if (compressed<=BUFFERSIZE)
\r
1882 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);
\r
1883 source = bufferseg;
\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
1893 CAL_ExpandGrChunk (chunk,source);
\r
1895 if (compressed>BUFFERSIZE)
\r
1896 MM_FreePtr(&bigbufferseg);
\r
1901 //==========================================================================
\r
1904 ======================
\r
1908 ======================
\r
1911 void CA_CacheMap (global_game_variables_t *gvar)
\r
1913 long pos,compressed;
\r
1915 memptr *dest,bigbufferseg;
\r
1917 unsigned far *source;
\r
1918 #ifdef MAPHEADERLINKED
\r
1919 memptr buffer2seg;
\r
1925 // free up memory from last map
\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
1933 gvar->ca.camap.mapon = gvar->ca.camap.mapnum;
\r
1937 // load map header
\r
1938 // The header will be cached if it is still around
\r
1940 // if (!gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapnum])
\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
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
1953 // MM_SetPurge (MEMPTR mapheaderseg[mapnum], 0, &(gvar->mm));
\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
1961 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1963 for (plane = 0; plane<MAPPLANES; plane++)
\r
1965 //pos = mapheaderseg[mapnum]->planestart[plane];
\r
1966 //compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1969 continue; // the plane is not used in this game
\r
1971 dest = MEMPTR mapsegs[plane];
\r
1972 MM_GetPtr(dest,size);
\r
1974 lseek(maphandle,pos,SEEK_SET);
\r
1975 if (compressed<=BUFFERSIZE)
\r
1976 source = bufferseg;
\r
1979 MM_GetPtr(&bigbufferseg,compressed);
\r
1980 MM_SetLock (&bigbufferseg,true);
\r
1981 source = bigbufferseg;
\r
1984 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1985 #ifdef MAPHEADERLINKED
\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
1992 expanded = *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
2002 // unRLEW, skipping expanded length
\r
2004 CA_RLEWexpand (source+1, *dest,size,
\r
2005 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
2008 if (compressed>BUFFERSIZE)
\r
2009 MM_FreePtr(&bigbufferseg);
\r
2013 //===========================================================================
\r
2016 ======================
\r
2020 = Goes up a bit level in the needed lists and clears it out.
\r
2021 = Everything is made purgable
\r
2023 ======================
\r
2026 void CA_UpLevel (global_game_variables_t *gvar)
\r
2028 if (gvar->ca.ca_levelnum==7)
\r
2029 printf("CA_UpLevel: Up past level 7!");
\r
2031 gvar->ca.ca_levelbit<<=1;
\r
2032 gvar->ca.ca_levelnum++;
\r
2035 //===========================================================================
\r
2038 ======================
\r
2042 = Goes down a bit level in the needed lists and recaches
\r
2043 = everything from the lower level
\r
2045 ======================
\r
2048 void CA_DownLevel (global_game_variables_t *gvar)
\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
2057 //===========================================================================
\r
2060 ======================
\r
2064 = Clears out all the marks at the current level
\r
2066 ======================
\r
2069 void CA_ClearMarks (global_game_variables_t *gvar)
\r
2073 for (i=0;i<NUMCHUNKS;i++)
\r
2074 gvar->ca.grneeded[i]&=~gvar->ca.ca_levelbit;
\r
2077 //===========================================================================
\r
2080 ======================
\r
2082 = CA_ClearAllMarks
\r
2084 = Clears out all the marks on all the levels
\r
2086 ======================
\r
2089 void CA_ClearAllMarks (global_game_variables_t *gvar)
\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
2096 //===========================================================================
\r
2099 ======================
\r
2103 ======================
\r
2106 void CA_SetGrPurge (global_game_variables_t *gvar)
\r
2113 CA_ClearMarks (gvar);
\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
2122 ======================
\r
2126 = Make everything possible purgable
\r
2128 ======================
\r
2131 void CA_SetAllPurge (global_game_variables_t *gvar)
\r
2135 CA_ClearMarks (gvar);
\r
2138 // free cursor sprite and background save
\r
2140 //____VW_FreeCursor ();
\r
2143 // free map headers and map planes
\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
2150 if (gvar->ca.mapsegs[i])
\r
2151 MM_FreePtr ((memptr *)&gvar->ca.mapsegs[i], gvar);
\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
2163 CA_SetGrPurge (gvar);
\r
2167 //===========================================================================
\r
2171 ======================
\r
2175 ======================
\r
2178 #define NUMBARS (17l*8)
\r
2181 unsigned thx,thy,lastx;
\r
2182 long barx,barstep;
\r
2184 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2186 unsigned homex,homey,x;
\r
2188 barstep = (NUMBARS<<16)/numcache;
\r
2191 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2193 US_CenterWindow (20,8);
\r
2197 US_CPrint ("Loading");
\r
2198 fontcolor = F_SECONDCOLOR;
\r
2199 US_CPrint (title);
\r
2200 fontcolor = F_BLACK;
\r
2203 // draw thermometer bar
\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
2215 VWB_DrawTile8(x,thy,1);
\r
2216 VWB_DrawTile8(x,thy+8,4);
\r
2217 VWB_DrawTile8(x,thy+16,7);
\r
2220 thx += 4; // first line location
\r
2222 barx = (long)thx<<16;
\r
2225 VW_UpdateScreen();
\r
2230 ======================
\r
2232 = CAL_DialogUpdate
\r
2234 ======================
\r
2237 void CAL_DialogUpdate (void)
\r
2243 if (xh - lastx > BARSTEP)
\r
2245 for (x=lastx;x<=xh;x++)
\r
2246 #if GRMODE == EGAGR
\r
2247 VWB_Vlin (thy,thy+13,x,14);
\r
2249 #if GRMODE == CGAGR
\r
2250 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2253 VW_UpdateScreen();
\r
2258 ======================
\r
2260 = CAL_DialogFinish
\r
2262 ======================
\r
2265 void CAL_DialogFinish (void)
\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
2274 #if GRMODE == CGAGR
\r
2275 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2277 VW_UpdateScreen();
\r
2281 //===========================================================================
\r
2284 ======================
\r
2288 ======================
\r
2290 #define MAXEMPTYREAD 1024
\r
2292 void CAL_CacheMarks (char *title, global_game_variables_t *gvar)
\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
2299 memptr bigbufferseg;
\r
2301 dialog = (title!=NULL);
\r
2305 // go through and make everything not needed purgable
\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
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
2317 if (gvar->ca.grsegs[i]) // not needed, so make it purgeable
\r
2318 MM_SetPurge(gvar->ca.grsegs[i],3,gvar);
\r
2321 if (!numcache) // nothing to cache!
\r
2324 // MDM begin - (GAMERS EDGE)
\r
2326 // if (!FindFile("EGAGRAPH.16",NULL,2))
\r
2327 // Quit (gvar, "CA_CacheMarks(): Can't find graphics files.");
\r
2334 write(profilehandle,title,strlen(title));
\r
2335 write(profilehandle,"\n",1);
\r
2338 drawcachebox(title,numcache);
\r
2342 // go through and load in anything still needed
\r
2344 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2346 for (i=0;i<NUMCHUNKS;i++)
\r
2347 if ( (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit)) && !gvar->ca.grsegs[i])
\r
2350 // update thermometer
\r
2352 if (dialog && updatecachebox)
\r
2353 updatecachebox ();
\r
2355 pos = GRFILEPOS(i);
\r
2360 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2363 compressed = GRFILEPOS(next)-pos;
\r
2364 endpos = pos+compressed;
\r
2366 if (compressed<=BUFFERSIZE)
\r
2368 if (bufferstart<=pos
\r
2369 && bufferend>= endpos)
\r
2371 // data is allready in buffer
\r
2372 source = (byte _seg *)bufferseg+(pos-bufferstart);
\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
2380 while (next < NUMCHUNKS &&
\r
2381 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2383 if (next == NUMCHUNKS)
\r
2386 nextpos = GRFILEPOS(next);
\r
2387 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2389 nextendpos = GRFILEPOS(next);
\r
2390 if (nextpos - endpos <= MAXEMPTYREAD
\r
2391 && nextendpos-pos <= BUFFERSIZE)
\r
2392 endpos = nextendpos;
\r
2394 next = NUMCHUNKS; // read pos to posend
\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
2406 // big chunk, allocate temporary buffer
\r
2407 MM_GetPtr(&bigbufferseg,compressed,gvar);
\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
2416 CAL_ExpandGrChunk (i,source);
\r
2420 if (compressed>BUFFERSIZE)
\r
2421 MM_FreePtr(&bigbufferseg);
\r
2426 // finish up any thermometer remnants
\r
2428 if (dialog && finishcachebox)
\r
2432 void CA_CannotOpen(char *string, global_game_variables_t *gvar)
\r
2436 strcpy(str,"Can't open ");
\r
2437 strcat(str,string);
\r
2438 strcat(str,"!\n");
\r