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 chunkcomplen,chunkexplen;
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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 CASVT GRFILEPOS(int c, global_game_variables_t *gvar)
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148 value = *(CASVT 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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160 CASVT GRFILEPOS(int c, global_game_variables_t *gvar)
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162 return gvar->ca.grstarts[c];
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167 =============================================================================
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171 =============================================================================
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175 ============================
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177 = CA_OpenDebug / CA_CloseDebug
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179 = Opens a binary file with the handle "debughandle"
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181 ============================
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183 void CA_OpenDebug(global_game_variables_t *gvar)
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185 #ifdef __BORLANDC__
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186 unlink("debug.16b");
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187 gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);
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190 unlink("debug.16w");
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191 gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);
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195 void CA_CloseDebug(global_game_variables_t *gvar)
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197 close(gvar->handle.debughandle);
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203 ============================
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205 = CAL_GetGrChunkLength
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207 = Gets the length of an explicit length chunk (not tiles)
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208 = The file pointer is positioned so the compressed data can be read in next.
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210 ============================
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213 void CAL_GetGrChunkLength (int chunk,global_game_variables_t *gvar)
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215 lseek(gvar->ca.file.grhandle,GRFILEPOS(chunk,gvar),SEEK_SET);
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216 read(gvar->ca.file.grhandle,&gvar->ca.chunkexplen,sizeof(gvar->ca.chunkexplen));
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217 gvar->ca.chunkcomplen = GRFILEPOS(chunk+1,gvar)-GRFILEPOS(chunk,gvar)-4;
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222 ==========================
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226 = Read from a file to a far pointer
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228 ==========================
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231 boolean CA_FarRead(int handle, byte far *dest, dword length, global_game_variables_t *gvar)
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234 if (length>0xfffflu)
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235 Quit (gvar, "CA_FarRead doesn't support 64K reads yet!");//TODO: EXPAND!!!
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240 mov cx,[WORD PTR length]
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241 mov dx,[WORD PTR dest]
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242 mov ds,[WORD PTR dest+2]
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243 mov ah,0x3f // READ w/handle
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250 #ifdef __BORLANDC__
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254 #ifdef __BORLANDC__
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257 cmp ax,[WORD PTR length]
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259 // errno = EINVFMT; // user manager knows this is bad read
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262 #ifdef __BORLANDC__
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266 #ifdef __BORLANDC__
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270 #ifdef __BORLANDC__
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282 ==========================
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286 = Write from a file to a far pointer
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288 ==========================
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291 boolean CA_FarWrite(int handle, byte far *source, dword length, global_game_variables_t *gvar)
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294 if (length>0xfffflu)
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295 Quit (gvar, "CA_FarWrite doesn't support 64K reads yet!");//TODO: EXPAND!!!
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300 mov cx,[WORD PTR length]
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301 mov dx,[WORD PTR source]
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302 mov ds,[WORD PTR source+2]
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303 mov ah,0x40 // WRITE w/handle
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310 #ifdef __BORLANDC__
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314 #ifdef __BORLANDC__
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317 cmp ax,[WORD PTR length]
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319 // errno = ENOMEM; // user manager knows this is bad write
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322 #ifdef __BORLANDC__
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326 #ifdef __BORLANDC__
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330 #ifdef __BORLANDC__
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342 ==========================
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346 = Reads a file into an allready allocated buffer
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348 ==========================
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351 boolean CA_ReadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)
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357 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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360 size = filelength(handle);
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361 #ifdef __DEBUG_CA__
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363 printf("===============================================================================\n");
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364 printf(" CA_ReadFile\n");
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365 printf("===============================================================================\n");
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367 printf(" ptr=%Fp\n", ptr);
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368 printf(" *ptr=%Fp\n", *ptr);
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369 printf(" &ptr=%Fp\n", &ptr);
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372 if(!CA_FarRead(handle,*ptr,size, gvar))
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383 ==========================
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387 = Writes a file from a memory buffer
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389 ==========================
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392 boolean CA_WriteFile (char *filename, void far *ptr, long length, global_game_variables_t *gvar)
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398 handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,
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399 S_IREAD | S_IWRITE | S_IFREG);
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404 if (!CA_FarWrite (handle,ptr,length, gvar))
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416 ==========================
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420 = Allocate space for and load a file
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422 ==========================
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425 boolean CA_LoadFile(char *filename, memptr *ptr, global_game_variables_t *gvar)
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431 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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434 size = filelength(handle);
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435 #ifdef __DEBUG_CA__
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437 printf("===============================================================================\n");
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438 printf(" CA_LoadFile\n");
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439 printf("===============================================================================\n");
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441 printf(" ptr=%Fp\n", ptr);
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442 printf(" *ptr=%Fp\n", *ptr);
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443 printf(" &ptr=%Fp\n", &ptr);
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446 MM_GetPtr(ptr,size, gvar);
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447 #ifdef __DEBUG_CA__
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450 printf("---------------------------------------\n");
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451 printf(" ptr=%Fp\n", ptr);
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452 printf(" *ptr=%Fp\n", *ptr);
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453 printf(" &ptr=%Fp\n", &ptr);
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454 printf("-------------------------------------------------------------------------------\n");
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457 if(!CA_FarRead(handle,*ptr,size, gvar))
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467 ============================================================================
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469 COMPRESSION routines, see JHUFF.C for more
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471 ============================================================================
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479 = CAL_OptimizeNodes
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481 = Goes through a huffman table and changes the 256-511 node numbers to the
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482 = actular address of the node. Must be called before CAL_HuffExpand
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487 void CAL_OptimizeNodes(huffnode *table)
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494 for (i=0;i<255;i++)
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496 if (node->bit0 >= 256)
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497 node->bit0 = (unsigned)(table+(node->bit0-256));
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498 if (node->bit1 >= 256)
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499 node->bit1 = (unsigned)(table+(node->bit1-256));
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507 ======================
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511 = Length is the length of the EXPANDED data
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513 ======================
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516 void CAL_HuffExpand (byte far *source, byte far *dest,
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517 long length,huffnode *hufftable)
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519 // unsigned bit,byte,node,code;
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520 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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522 // huffnode *nodeon;
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524 headptr = hufftable+254; // head node is allways node 254
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526 source++; // normalize
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531 sourceseg = FP_SEG(source);
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532 sourceoff = FP_OFF(source);
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533 destseg = FP_SEG(dest);
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534 destoff = FP_OFF(dest);
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535 endoff = destoff+length;
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540 // ss:bx node pointer
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543 if (length <0xfff0)
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546 //--------------------------
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547 // expand less than 64k of data
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548 //--------------------------
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551 mov bx,[word ptr headptr]
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559 mov ch,[si] // load first byte
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562 #ifdef __BORLANDC__
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566 #ifdef __BORLANDC__
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569 test ch,cl // bit set?
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571 mov dx,[ss:bx] // take bit0 path from node
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572 shl cl,1 // advance to next bit position
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575 #ifdef __BORLANDC__
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579 #ifdef __BORLANDC__
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582 mov dx,[ss:bx+2] // take bit1 path
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583 shl cl,1 // advance to next bit position
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585 #ifdef __BORLANDC__
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589 #ifdef __BORLANDC__
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592 mov ch,[si] // load next byte
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594 mov cl,1 // back to first bit
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595 #ifdef __BORLANDC__
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599 #ifdef __BORLANDC__
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602 or dh,dh // if dx<256 its a byte, else move node
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604 mov bx,dx // next node = (huffnode *)code
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606 #ifdef __BORLANDC__
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610 #ifdef __BORLANDC__
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614 inc di // write a decopmpressed byte out
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615 mov bx,[word ptr headptr] // back to the head node for next bit
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624 //--------------------------
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625 // expand more than 64k of data
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626 //--------------------------
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631 mov bx,[word ptr headptr]
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639 lodsb // load first byte
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640 #ifdef __BORLANDC__
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644 #ifdef __BORLANDC__
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647 test al,cl // bit set?
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649 mov dx,[ss:bx] // take bit0 path from node
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651 #ifdef __BORLANDC__
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655 #ifdef __BORLANDC__
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658 mov dx,[ss:bx+2] // take bit1 path
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659 #ifdef __BORLANDC__
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663 #ifdef __BORLANDC__
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666 shl cl,1 // advance to next bit position
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669 cmp si,0x10 // normalize ds:si
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675 #ifdef __BORLANDC__
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679 #ifdef __BORLANDC__
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682 mov cl,1 // back to first bit
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683 #ifdef __BORLANDC__
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687 #ifdef __BORLANDC__
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690 or dh,dh // if dx<256 its a byte, else move node
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692 mov bx,dx // next node = (huffnode *)code
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694 #ifdef __BORLANDC__
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698 #ifdef __BORLANDC__
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702 inc di // write a decopmpressed byte out
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703 mov bx,[word ptr headptr] // back to the head node for next bit
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705 cmp di,0x10 // normalize es:di
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711 #ifdef __BORLANDC__
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715 #ifdef __BORLANDC__
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718 sub [WORD PTR ss:length],1
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720 dec [WORD PTR ss:length+2]
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721 jns expand // when length = ffff ffff, done
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734 ======================
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736 = CAL_CarmackExpand
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738 = Length is the length of the EXPANDED data
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740 ======================
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743 #define NEARTAG 0xa7
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744 #define FARTAG 0xa8
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746 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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748 unsigned ch,chhigh,count,offset;
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749 unsigned far *copyptr, far *inptr, far *outptr;
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760 if (chhigh == NEARTAG)
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764 { // have to insert a word containing the tag byte
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765 ch |= *(/*(unsigned char far *)*/inptr)++;
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771 offset = *(/*(unsigned char far *)*/inptr)++;
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772 copyptr = outptr - offset;
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775 *outptr++ = *copyptr++;
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778 else if (chhigh == FARTAG)
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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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790 copyptr = dest + offset;
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793 *outptr++ = *copyptr++;
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806 ======================
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810 ======================
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813 long CA_RLEWCompress (unsigned far *source, long length, unsigned far *dest,
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817 unsigned value,count,i;
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818 unsigned far *start,far *end;
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822 end = source + (length+1)/2;
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831 while (*source == value && source<end)
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836 if (count>3 || value == rlewtag)
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839 // send a tag / count / value string
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848 // send word without compressing
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850 for (i=1;i<=count;i++)
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854 } while (source<end);
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856 complength = 2*(dest-start);
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862 ======================
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865 = length is EXPANDED length
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867 ======================
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870 void CA_RLEWexpand (unsigned far *source, unsigned far *dest,long length,
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873 // unsigned value,count,i;
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875 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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885 if (value != rlewtag)
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893 // compressed string
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897 for (i=1;i<=count;i++)
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900 } while (dest<end);
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903 end = dest + (length)/2;
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904 sourceseg = FP_SEG(source);
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905 sourceoff = FP_OFF(source);
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906 destseg = FP_SEG(dest);
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907 destoff = FP_OFF(dest);
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908 endseg = FP_SEG(end);
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909 endoff = FP_OFF(end);
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913 // ax = source value
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915 // cx = repeat counts
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918 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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926 #ifdef __BORLANDC__
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930 #ifdef __BORLANDC__
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938 #ifdef __BORLANDC__
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942 #ifdef __BORLANDC__
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946 mov cx,ax // repeat count
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947 lodsw // repeat value
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949 #ifdef __BORLANDC__
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953 #ifdef __BORLANDC__
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956 cmp si,0x10 // normalize ds:si
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967 #ifdef __BORLANDC__
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971 #ifdef __BORLANDC__
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974 cmp di,0x10 // normalize es:di
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985 #ifdef __BORLANDC__
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989 #ifdef __BORLANDC__
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1005 =============================================================================
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1007 CACHE MANAGER ROUTINES
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1009 =============================================================================
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1013 ======================
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1017 ======================
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1020 void CAL_SetupGrFile (global_game_variables_t *gvar)
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1028 #ifdef GRHEADERLINKED
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1030 gvar->ca.grhuffman = (huffnode *)&VGAdict;
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1031 grstarts = (long _seg *)FP_SEG(&VGAhead);
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1033 CAL_OptimizeNodes (gvar->ca.grhuffman);
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1038 // load ???dict.ext (huffman dictionary for graphics files)
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1041 strcpy(fname,GDICTNAME);
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1042 strcat(fname,EXTENSION);
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1044 if ((handle = open(fname,
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1045 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1046 CA_CannotOpen(fname,gvar);
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1048 read(handle, &gvar->ca.grhuffman, sizeof(gvar->ca.grhuffman));
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1050 CAL_OptimizeNodes (gvar->ca.grhuffman);
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1052 // load the data offsets from ???head.ext
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1054 MM_GetPtr (MEMPTRCONV gvar->ca.grstarts,(NUMCHUNKS+1)*FILEPOSSIZE, gvar);
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1056 strcpy(fname,GHEADNAME);
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1057 strcat(fname,EXTENSION);
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1059 if ((handle = open(fname,
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1060 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1061 CA_CannotOpen(fname,gvar);
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1063 CA_FarRead(handle, (memptr)gvar->ca.grstarts, (NUMCHUNKS+1)*FILEPOSSIZE, gvar);
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1071 // Open the graphics file, leaving it open until the game is finished
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1073 strcpy(fname,GFILENAME);
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1074 strcat(fname,EXTENSION);
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1076 gvar->ca.file.grhandle = open(fname, O_RDONLY | O_BINARY);
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1077 if (gvar->ca.file.grhandle == -1)
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1078 CA_CannotOpen(fname,gvar);
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1082 // load the pic and sprite headers into the arrays in the data segment
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1085 MM_GetPtr(MEMPTRCONV gvar->video.pictable,NUMPICS*sizeof(pictabletype),gvar);
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1086 CAL_GetGrChunkLength(STRUCTPIC,gvar); // position file pointer
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1087 printf("CAL_SetupGrFile:\n");
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1088 printf(" gvar->ca.chunkcomplen size is %lu\n", gvar->ca.chunkcomplen);
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1089 MM_GetPtr(&compseg,gvar->ca.chunkcomplen,gvar);
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1091 CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen,gvar);
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1092 CAL_HuffExpand (compseg, (byte far *)gvar->video.pictable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);
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1093 MM_FreePtr(&compseg,gvar);
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1097 MM_GetPtr(MEMPTRCONV picmtable,NUMPICM*sizeof(pictabletype));
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1098 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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1099 MM_GetPtr(&compseg,gvar->ca.chunkcomplen);
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1100 CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);
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1101 CAL_HuffExpand (compseg, (byte far *)picmtable,NUMPICS*sizeof(pictabletype),gvar->ca.grhuffman);
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1102 MM_FreePtr(&compseg);
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1106 MM_GetPtr(MEMPTRCONV spritetable,NUMSPRITES*sizeof(spritetabletype));
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1107 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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1108 MM_GetPtr(&compseg,gvar->ca.chunkcomplen);
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1109 CA_FarRead (gvar->ca.file.grhandle,compseg,gvar->ca.chunkcomplen);
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1110 CAL_HuffExpand (compseg, (byte far *)spritetable,NUMSPRITES*sizeof(spritetabletype),gvar->ca.grhuffman);
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1111 MM_FreePtr(&compseg);
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1116 //==========================================================================
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1120 ======================
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1122 = CAL_SetupMapFile
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1124 ======================
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1127 void CAL_SetupMapFile (global_game_variables_t *gvar)
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1129 #ifndef MAPHEADERLINKED
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1135 // load maphead.ext (offsets and tileinfo for map file)
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1137 #ifndef MAPHEADERLINKED
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1138 if ((handle = open("maphead.mph",
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1139 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1140 Quit (gvar, "Can't open maphead.mph");
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1141 length = filelength(handle);
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1142 MM_GetPtr (MEMPTRCONV gvar->ca.tinf,length,gvar);
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1143 CA_FarRead(handle, gvar->ca.tinf, length,gvar);
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1147 gvar->ca.tinf = (byte _seg *)FP_SEG(&maphead);
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1152 // open the data file
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1154 //TODO: multiple files
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1155 if ((gvar->ca.file.maphandle = open("data/test.map",
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1156 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1157 Quit (gvar, "Can't open data/test.map!");
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1158 /*#ifdef MAPHEADERLINKED
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1159 if ((maphandle = open("GAMEMAPS.16"ENSION,
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1160 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1161 Quit (gvar, "Can't open GAMEMAPS.16"ENSION"!");
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1163 if ((maphandle = open("MAPTEMP.16"ENSION,
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1164 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1165 Quit (gvar, "Can't open MAPTEMP.16"ENSION"!");
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1169 //==========================================================================
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1173 ======================
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1175 = CAL_SetupAudioFile
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1177 ======================
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1180 /*void CAL_SetupAudioFile (void)
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1186 // load maphead.ext (offsets and tileinfo for map file)
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1188 #ifndef AUDIOHEADERLINKED
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1189 if ((handle = open("AUDIOHED.16",
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1190 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1191 Quit (gvar, "Can't open AUDIOHED.16""!");
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1192 length = filelength(handle);
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1193 MM_GetPtr (MEMPTRCONV audiostarts,length);
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1194 CA_FarRead(handle, (byte far *)audiostarts, length);
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1197 audiohuffman = (huffnode *)&audiodict;
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1198 CAL_OptimizeNodes (audiohuffman);
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1199 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1203 // open the data file
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1205 #ifndef AUDIOHEADERLINKED
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1206 if ((audiohandle = open("AUDIOT.16",
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1207 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1208 Quit (gvar, "Can't open AUDIOT.16""!");
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1210 if ((audiohandle = open("AUDIO.16",
\r
1211 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
1212 Quit (gvar, "Can't open AUDIO.16""!");
\r
1216 //==========================================================================
\r
1220 ======================
\r
1224 = Open all files and load in headers
\r
1226 ======================
\r
1229 void CA_Startup(global_game_variables_t *gvar)
\r
1232 #ifdef __BORLANDC__
\r
1233 unlink("profile.16b");
\r
1234 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
\r
1236 #ifdef __WATCOMC__
\r
1237 unlink("profile.16w");
\r
1238 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
\r
1242 #ifdef __BORLANDC__
\r
1243 unlink("meminfo.16b");
\r
1244 gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);
\r
1246 #ifdef __WATCOMC__
\r
1247 unlink("meminfo.16w");
\r
1248 gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);
\r
1253 CAL_SetupMapFile (gvar);
\r
1255 #ifndef NOGRAPHICS
\r
1256 CAL_SetupGrFile (gvar);
\r
1259 CAL_SetupMapFile (gvar);
\r
1262 gvar->ca.camap.mapon = -1;
\r
1263 gvar->ca.ca_levelbit = 1;
\r
1264 gvar->ca.ca_levelnum = 0;
\r
1266 /* drawcachebox = CAL_DialogDraw;
\r
1267 updatecachebox = CAL_DialogUpdate;
\r
1268 finishcachebox = CAL_DialogFinish;*/
\r
1271 //==========================================================================
\r
1275 ======================
\r
1279 = Closes all files
\r
1281 ======================
\r
1284 void CA_Shutdown(global_game_variables_t *gvar)
\r
1287 close(gvar->handle.profilehandle);
\r
1289 close(gvar->handle.showmemhandle);
\r
1291 close(gvar->ca.file.maphandle);
\r
1292 close(gvar->ca.file.grhandle);
\r
1293 close(gvar->ca.file.audiohandle);
\r
1296 //===========================================================================
\r
1299 ======================
\r
1301 = CA_CacheAudioChunk
\r
1303 ======================
\r
1306 void CA_CacheAudioChunk (int chunk)
\r
1308 long pos,compressed;
\r
1309 #ifdef AUDIOHEADERLINKED
\r
1311 memptr bigbufferseg;
\r
1315 if (audiosegs[chunk])
\r
1317 MM_SetPurge (MEMPTRCONV audiosegs[chunk],0);
\r
1318 return; // allready in memory
\r
1321 // MDM begin - (GAMERS EDGE)
\r
1323 if (!FindFile("AUDIO.16",NULL,2))
\r
1324 Quit (gvar, "CA_CacheAudioChunk(): Can't find audio files.");
\r
1329 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1330 // a larger buffer
\r
1332 pos = audiostarts[chunk];
\r
1333 compressed = audiostarts[chunk+1]-pos;
\r
1335 lseek(audiohandle,pos,SEEK_SET);
\r
1337 #ifndef AUDIOHEADERLINKED
\r
1339 MM_GetPtr (MEMPTRCONV audiosegs[chunk],compressed);
\r
1343 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1347 if (compressed<=BUFFERSIZE)
\r
1349 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1350 source = bufferseg;
\r
1354 MM_GetPtr(&bigbufferseg,compressed);
\r
1357 MM_SetLock (&bigbufferseg,true);
\r
1358 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1359 source = bigbufferseg;
\r
1362 expanded = *(long far *)source;
\r
1363 source += 4; // skip over length
\r
1364 MM_GetPtr (MEMPTRCONV audiosegs[chunk],expanded);
\r
1367 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1370 if (compressed>BUFFERSIZE)
\r
1371 MM_FreePtr(&bigbufferseg);
\r
1375 //===========================================================================
\r
1378 ======================
\r
1380 = CA_LoadAllSounds
\r
1382 = Purges all sounds, then loads all new ones (mode switch)
\r
1384 ======================
\r
1387 void CA_LoadAllSounds (void)
\r
1391 switch (oldsoundmode)
\r
1396 start = STARTPCSOUNDS;
\r
1399 start = STARTADLIBSOUNDS;
\r
1403 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1404 if (audiosegs[start])
\r
1405 MM_SetPurge (MEMPTRCONV audiosegs[start],3); // make purgable
\r
1409 switch (SoundMode)
\r
1414 start = STARTPCSOUNDS;
\r
1417 start = STARTADLIBSOUNDS;
\r
1421 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1422 CA_CacheAudioChunk (start);
\r
1424 oldsoundmode = SoundMode;
\r
1427 //===========================================================================
\r
1429 //????#if GRMODE == EGAGR
\r
1432 ======================
\r
1436 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1438 ======================
\r
1441 unsigned static sheight,swidth;
\r
1442 boolean static dothemask;
\r
1444 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1445 unsigned width, unsigned height, unsigned pixshift, boolean domask, global_game_variables_t *gvar)
\r
1448 sheight = height; // because we are going to reassign bp
\r
1450 dothemask = domask;
\r
1454 mov ds,ax // source and dest are in same segment, and all local
\r
1461 mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1462 // mov bp,WORD PTR [gvar->video.shifttabletable+bp] // bp holds pointer to shift table
\r
1464 cmp [ss:dothemask],0
\r
1468 // table shift the mask
\r
1470 mov dx,[ss:sheight]
\r
1471 #ifdef __BORLANDC__
\r
1475 #ifdef __BORLANDC__
\r
1478 mov BYTE PTR [di],255 // 0xff first byte
\r
1479 mov cx,ss:[swidth]
\r
1480 #ifdef __BORLANDC__
\r
1484 #ifdef __BORLANDC__
\r
1487 mov al,[bx] // source
\r
1489 inc bx // next source byte
\r
1493 mov ax,[bp+si] // table shift into two bytes
\r
1495 and [di],al // and with first byte
\r
1497 mov [di],ah // replace next byte
\r
1501 inc di // the last shifted byte has 1s in it
\r
1504 #ifdef __BORLANDC__
\r
1508 #ifdef __BORLANDC__
\r
1512 // table shift the data
\r
1514 mov dx,ss:[sheight]
\r
1516 shl dx,1 // four planes of data
\r
1517 #ifdef __BORLANDC__
\r
1521 #ifdef __BORLANDC__
\r
1524 mov BYTE PTR [di],0 // 0 first byte
\r
1525 mov cx,ss:[swidth]
\r
1526 #ifdef __BORLANDC__
\r
1530 #ifdef __BORLANDC__
\r
1533 mov al,[bx] // source
\r
1534 inc bx // next source byte
\r
1538 mov ax,[bp+si] // table shift into two bytes
\r
1539 or [di],al // or with first byte
\r
1541 mov [di],ah // replace next byte
\r
1545 inc di // the last shifted byte has 0s in it
\r
1553 mov ax,ss // restore data segment
\r
1561 //===========================================================================
\r
1564 ======================
\r
1568 = Generate shifts and set up sprite structure for a given sprite
\r
1570 ======================
\r
1573 void CAL_CacheSprite (int chunk, byte far *compressed, global_game_variables_t *gvar)
\r
1576 unsigned shiftstarts[5];
\r
1577 unsigned smallplane,bigplane,expanded;
\r
1578 spritetabletype far *spr;
\r
1579 spritetype _seg *dest;
\r
1584 // CGA has no pel panning, so shifts are never needed
\r
1586 spr = &gvar->video.spritetable[chunk-STARTSPRITES];
\r
1587 smallplane = spr->width*spr->height;
\r
1588 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1591 dest = (spritetype _seg *)grsegs[chunk];
\r
1592 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1593 dest->planesize[0] = smallplane;
\r
1594 dest->width[0] = spr->width;
\r
1597 // expand the unshifted shape
\r
1599 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,gvar->ca.grhuffman);
\r
1604 //#if GRMODE == EGAGR
\r
1607 // calculate sizes
\r
1609 spr = &gvar->video.spritetable[chunk-STARTSPRITES];
\r
1610 smallplane = spr->width*spr->height;
\r
1611 bigplane = (spr->width+1)*spr->height;
\r
1613 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1614 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1615 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1616 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1617 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1619 expanded = shiftstarts[spr->shifts];
\r
1620 MM_GetPtr (MEMPTRCONV gvar->ca.grsegs[chunk],expanded, gvar);
\r
1621 if (gvar->mm.mmerror)
\r
1623 dest = (spritetype _seg *)gvar->ca.grsegs[chunk];
\r
1626 // expand the unshifted shape
\r
1628 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,gvar->ca.grhuffman);
\r
1631 // make the shifts!
\r
1633 switch (spr->shifts)
\r
1638 dest->sourceoffset[i] = shiftstarts[0];
\r
1639 dest->planesize[i] = smallplane;
\r
1640 dest->width[i] = spr->width;
\r
1647 dest->sourceoffset[i] = shiftstarts[0];
\r
1648 dest->planesize[i] = smallplane;
\r
1649 dest->width[i] = spr->width;
\r
1653 dest->sourceoffset[i] = shiftstarts[1];
\r
1654 dest->planesize[i] = bigplane;
\r
1655 dest->width[i] = spr->width+1;
\r
1657 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],
\r
1658 dest->sourceoffset[2],spr->width,spr->height,4,true,gvar);
\r
1662 dest->sourceoffset[0] = shiftstarts[0];
\r
1663 dest->planesize[0] = smallplane;
\r
1664 dest->width[0] = spr->width;
\r
1666 dest->sourceoffset[1] = shiftstarts[1];
\r
1667 dest->planesize[1] = bigplane;
\r
1668 dest->width[1] = spr->width+1;
\r
1669 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],
\r
1670 dest->sourceoffset[1],spr->width,spr->height,2,true,gvar);
\r
1672 dest->sourceoffset[2] = shiftstarts[2];
\r
1673 dest->planesize[2] = bigplane;
\r
1674 dest->width[2] = spr->width+1;
\r
1675 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],
\r
1676 dest->sourceoffset[2],spr->width,spr->height,4,true,gvar);
\r
1678 dest->sourceoffset[3] = shiftstarts[3];
\r
1679 dest->planesize[3] = bigplane;
\r
1680 dest->width[3] = spr->width+1;
\r
1681 CAL_ShiftSprite ((unsigned)gvar->ca.grsegs[chunk],dest->sourceoffset[0],
\r
1682 dest->sourceoffset[3],spr->width,spr->height,6,true,gvar);
\r
1687 Quit (gvar, "CAL_CacheSprite: Bad shifts number!");
\r
1693 //===========================================================================
\r
1697 ======================
\r
1699 = CAL_ExpandGrChunk
\r
1701 = Does whatever is needed with a pointer to a compressed chunk
\r
1703 ======================
\r
1706 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1711 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1714 // expanded sizes of tile8/16/32 are implicit
\r
1717 #if GRMODE == EGAGR
\r
1719 #define MASKBLOCK 40
\r
1722 #if GRMODE == CGAGR
\r
1724 #define MASKBLOCK 32
\r
1727 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1728 expanded = BLOCK*NUMTILE8;
\r
1729 else if (chunk<STARTTILE16)
\r
1730 expanded = MASKBLOCK*NUMTILE8M;
\r
1731 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1732 expanded = BLOCK*4;
\r
1733 else if (chunk<STARTTILE32)
\r
1734 expanded = MASKBLOCK*4;
\r
1735 else if (chunk<STARTTILE32M)
\r
1736 expanded = BLOCK*16;
\r
1738 expanded = MASKBLOCK*16;
\r
1743 // everything else has an explicit size longword
\r
1745 expanded = *(long far *)source;
\r
1746 source += 4; // skip over length
\r
1750 // allocate final space, decompress it, and free bigbuffer
\r
1751 // Sprites need to have shifts made and various other junk
\r
1753 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1754 CAL_CacheSprite(chunk,source);
\r
1757 MM_GetPtr (&grsegs[chunk],expanded);
\r
1760 CAL_HuffExpand (source,grsegs[chunk],expanded,gvar->ca.grhuffman);
\r
1766 ======================
\r
1770 = Gets a chunk off disk, optimizing reads to general buffer
\r
1772 ======================
\r
1775 void CAL_ReadGrChunk (int chunk)
\r
1777 long pos,compressed;
\r
1778 memptr bigbufferseg;
\r
1783 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1784 // a larger buffer
\r
1786 pos = GRFILEPOS(chunk,gvar);
\r
1787 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1791 while (GRFILEPOS(next,gvar) == -1) // skip past any sparse tiles
\r
1794 compressed = GRFILEPOS(next,gvar)-pos;
\r
1796 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);
\r
1798 if (compressed<=BUFFERSIZE)
\r
1800 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);
\r
1801 source = bufferseg;
\r
1805 MM_GetPtr(&bigbufferseg,compressed);
\r
1808 MM_SetLock (&bigbufferseg,true);
\r
1809 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);
\r
1810 source = bigbufferseg;
\r
1813 CAL_ExpandGrChunk (chunk,source);
\r
1815 if (compressed>BUFFERSIZE)
\r
1816 MM_FreePtr(&bigbufferseg);
\r
1820 ======================
\r
1824 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1826 ======================
\r
1829 void CA_CacheGrChunk (int chunk)
\r
1831 long pos,compressed;
\r
1832 memptr bigbufferseg;
\r
1836 gvar->ca.grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1837 if (grsegs[chunk])
\r
1839 MM_SetPurge (&grsegs[chunk],0);
\r
1840 return; // allready in memory
\r
1843 // MDM begin - (GAMERS EDGE)
\r
1845 if (!FindFile("EGAGRAPH.16",NULL,2))
\r
1846 Quit (gvar, "CA_CacheGrChunk(): Can't find graphics files.");
\r
1851 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1852 // a larger buffer
\r
1854 pos = GRFILEPOS(chunk,gvar);
\r
1855 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1859 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1862 compressed = GRFILEPOS(next,gvar)-pos;
\r
1864 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);
\r
1866 if (compressed<=BUFFERSIZE)
\r
1868 CA_FarRead(gvar->ca.file.grhandle,bufferseg,compressed);
\r
1869 source = bufferseg;
\r
1873 MM_GetPtr(&bigbufferseg,compressed);
\r
1874 MM_SetLock (&bigbufferseg,true);
\r
1875 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed);
\r
1876 source = bigbufferseg;
\r
1879 CAL_ExpandGrChunk (chunk,source);
\r
1881 if (compressed>BUFFERSIZE)
\r
1882 MM_FreePtr(&bigbufferseg);
\r
1887 //==========================================================================
\r
1890 ======================
\r
1894 ======================
\r
1897 void CA_CacheMap (global_game_variables_t *gvar)
\r
1899 long pos,compressed;
\r
1901 memptr *dest,bigbufferseg;
\r
1903 unsigned far *source;
\r
1904 #ifdef MAPHEADERLINKED
\r
1905 memptr buffer2seg;
\r
1911 // free up memory from last map
\r
1913 if (gvar->ca.camap.mapon>-1 && gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapon])
\r
1914 MM_SetPurge (((memptr)gvar->ca.camap.mapheaderseg[(gvar->ca.camap.mapon)]), 3, gvar);
\r
1915 for (plane=0;plane<MAPPLANES;plane++)
\r
1916 if (gvar->ca.camap.mapsegs[plane])
\r
1917 MM_FreePtr ((memptr)gvar->ca.camap.mapsegs[plane], gvar);
\r
1919 gvar->ca.camap.mapon = gvar->ca.camap.mapnum;
\r
1923 // load map header
\r
1924 // The header will be cached if it is still around
\r
1926 // if (!gvar->ca.camap.mapheaderseg[gvar->ca.camap.mapnum])
\r
1928 // //pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1929 // //pos = ((_seg *)gvar->ca.camap.tinf)->headeroffsets[gvar->ca.camap.mapnum];
\r
1930 // pos = ((memptr)gvar->ca.camap.tinf)->headeroffsets[gvar->ca.camap.mapnum];
\r
1931 // if (pos<0) // $FFFFFFFF start is a sparse map
\r
1932 // printf("CA_CacheMap: Tried to load a non existent map!");
\r
1934 // MM_GetPtr(MEMPTRCONV gvar->ca.camapheaderseg[mapnum],sizeof(maptype));
\r
1935 // lseek(maphandle,pos,SEEK_SET);
\r
1936 // CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1939 // MM_SetPurge (MEMPTRCONV mapheaderseg[mapnum], 0, &(gvar->mm));
\r
1942 // load the planes in
\r
1943 // If a plane's pointer still exists it will be overwritten (levels are
\r
1944 // allways reloaded, never cached)
\r
1947 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1949 for (plane = 0; plane<MAPPLANES; plane++)
\r
1951 //pos = mapheaderseg[mapnum]->planestart[plane];
\r
1952 //compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1955 continue; // the plane is not used in this game
\r
1957 dest = MEMPTRCONV mapsegs[plane];
\r
1958 MM_GetPtr(dest,size);
\r
1960 lseek(maphandle,pos,SEEK_SET);
\r
1961 if (compressed<=BUFFERSIZE)
\r
1962 source = bufferseg;
\r
1965 MM_GetPtr(&bigbufferseg,compressed);
\r
1966 MM_SetLock (&bigbufferseg,true);
\r
1967 source = bigbufferseg;
\r
1970 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1971 #ifdef MAPHEADERLINKED
\r
1973 // unhuffman, then unRLEW
\r
1974 // The huffman'd chunk has a two byte expanded length first
\r
1975 // The resulting RLEW chunk also does, even though it's not really
\r
1978 expanded = *source;
\r
1980 MM_GetPtr (&buffer2seg,expanded);
\r
1981 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1982 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1983 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1984 MM_FreePtr (&buffer2seg);
\r
1988 // unRLEW, skipping expanded length
\r
1990 CA_RLEWexpand (source+1, *dest,size,
\r
1991 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1994 if (compressed>BUFFERSIZE)
\r
1995 MM_FreePtr(&bigbufferseg);
\r
1999 //===========================================================================
\r
2002 ======================
\r
2006 = Goes up a bit level in the needed lists and clears it out.
\r
2007 = Everything is made purgable
\r
2009 ======================
\r
2012 void CA_UpLevel (global_game_variables_t *gvar)
\r
2014 if (gvar->ca.ca_levelnum==7)
\r
2015 printf("CA_UpLevel: Up past level 7!");
\r
2017 gvar->ca.ca_levelbit<<=1;
\r
2018 gvar->ca.ca_levelnum++;
\r
2021 //===========================================================================
\r
2024 ======================
\r
2028 = Goes down a bit level in the needed lists and recaches
\r
2029 = everything from the lower level
\r
2031 ======================
\r
2034 void CA_DownLevel (global_game_variables_t *gvar)
\r
2036 if (!gvar->ca.ca_levelnum)
\r
2037 printf("CA_DownLevel: Down past level 0!");
\r
2038 gvar->ca.ca_levelbit>>=1;
\r
2039 gvar->ca.ca_levelnum--;
\r
2040 ////++++++++++++++++++++++++++++++++++++++++++CA_CacheMarks(NULL);
\r
2043 //===========================================================================
\r
2046 ======================
\r
2050 = Clears out all the marks at the current level
\r
2052 ======================
\r
2055 void CA_ClearMarks (global_game_variables_t *gvar)
\r
2059 for (i=0;i<NUMCHUNKS;i++)
\r
2060 gvar->ca.grneeded[i]&=~gvar->ca.ca_levelbit;
\r
2063 //===========================================================================
\r
2066 ======================
\r
2068 = CA_ClearAllMarks
\r
2070 = Clears out all the marks on all the levels
\r
2072 ======================
\r
2075 void CA_ClearAllMarks (global_game_variables_t *gvar)
\r
2077 _fmemset (gvar->ca.grneeded,0,sizeof(gvar->ca.grneeded));
\r
2078 gvar->ca.ca_levelbit = 1;
\r
2079 gvar->ca.ca_levelnum = 0;
\r
2082 //===========================================================================
\r
2085 ======================
\r
2089 ======================
\r
2092 void CA_SetGrPurge (global_game_variables_t *gvar)
\r
2099 CA_ClearMarks (gvar);
\r
2101 for (i=0;i<NUMCHUNKS;i++)
\r
2102 if (gvar->ca.grsegs[i])
\r
2103 MM_SetPurge (gvar->ca.grsegs[i],3, gvar);
\r
2108 ======================
\r
2112 = Make everything possible purgable
\r
2114 ======================
\r
2117 void CA_SetAllPurge (global_game_variables_t *gvar)
\r
2121 CA_ClearMarks (gvar);
\r
2124 // free cursor sprite and background save
\r
2126 //____VW_FreeCursor ();
\r
2129 // free map headers and map planes
\r
2131 // for (i=0;i<NUMMAPS;i++)
\r
2132 // if (gvar->ca.camap.mapheaderseg[i])
\r
2133 // MM_SetPurge (gvar->ca.camap.mapheaderseg[i],3, gvar);
\r
2136 if (gvar->ca.mapsegs[i])
\r
2137 MM_FreePtr ((memptr *)&gvar->ca.mapsegs[i], gvar);
\r
2142 for (i=0;i<NUMSNDCHUNKS;i++)
\r
2143 if (gvar->ca.audiosegs[i])
\r
2144 MM_SetPurge ((memptr *)&gvar->ca.audiosegs[i],3, gvar);
\r
2149 CA_SetGrPurge (gvar);
\r
2153 //===========================================================================
\r
2157 ======================
\r
2161 ======================
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2164 #define NUMBARS (17l*8)
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2167 unsigned thx,thy,lastx;
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2168 long barx,barstep;
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2170 void CAL_DialogDraw (char *title,unsigned numcache)
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2172 unsigned homex,homey,x;
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2174 barstep = (NUMBARS<<16)/numcache;
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2177 // draw dialog window (masked tiles 12 - 20 are window borders)
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2179 US_CenterWindow (20,8);
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2183 US_CPrint ("Loading");
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2184 fontcolor = F_SECONDCOLOR;
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2185 US_CPrint (title);
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2186 fontcolor = F_BLACK;
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2189 // draw thermometer bar
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2193 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
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2194 VWB_DrawTile8(thx,thy+8,3);
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2195 VWB_DrawTile8(thx,thy+16,6);
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2196 VWB_DrawTile8(thx+17*8,thy,2);
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2197 VWB_DrawTile8(thx+17*8,thy+8,5);
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2198 VWB_DrawTile8(thx+17*8,thy+16,8);
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2199 for (x=thx+8;x<thx+17*8;x+=8)
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2201 VWB_DrawTile8(x,thy,1);
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2202 VWB_DrawTile8(x,thy+8,4);
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2203 VWB_DrawTile8(x,thy+16,7);
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2206 thx += 4; // first line location
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2208 barx = (long)thx<<16;
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2211 VW_UpdateScreen();
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2216 ======================
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2218 = CAL_DialogUpdate
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2220 ======================
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2223 void CAL_DialogUpdate (void)
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2229 if (xh - lastx > BARSTEP)
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2231 for (x=lastx;x<=xh;x++)
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2232 #if GRMODE == EGAGR
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2233 VWB_Vlin (thy,thy+13,x,14);
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2235 #if GRMODE == CGAGR
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2236 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
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2239 VW_UpdateScreen();
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2244 ======================
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2246 = CAL_DialogFinish
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2248 ======================
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2251 void CAL_DialogFinish (void)
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2255 xh = thx + NUMBARS;
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2256 for (x=lastx;x<=xh;x++)
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2257 #if GRMODE == EGAGR
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2258 VWB_Vlin (thy,thy+13,x,14);
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2260 #if GRMODE == CGAGR
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2261 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
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2263 VW_UpdateScreen();
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2267 //===========================================================================
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2270 ======================
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2274 ======================
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2276 #define MAXEMPTYREAD 1024
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2278 void CAL_CacheMarks (char *title, global_game_variables_t *gvar)
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2281 int i,next,numcache;
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2282 long pos,endpos,nextpos,nextendpos,compressed;
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2283 long bufferstart,bufferend; // file position of general buffer
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2285 memptr bigbufferseg;
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2287 dialog = (title!=NULL);
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2291 // go through and make everything not needed purgable
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2293 for (i=0;i<NUMCHUNKS;i++)
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2294 if (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit))//if (grneeded[i]&ca_levelbit)
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2296 if (gvar->ca.grsegs[i]) // its allready in memory, make
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2297 MM_SetPurge(gvar->ca.grsegs[i],0,gvar); // sure it stays there!
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2303 if (gvar->ca.grsegs[i]) // not needed, so make it purgeable
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2304 MM_SetPurge(gvar->ca.grsegs[i],3,gvar);
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2307 if (!numcache) // nothing to cache!
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2310 // MDM begin - (GAMERS EDGE)
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2312 // if (!FindFile("EGAGRAPH.16",NULL,2))
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2313 // Quit (gvar, "CA_CacheMarks(): Can't find graphics files.");
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2320 write(profilehandle,title,strlen(title));
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2321 write(profilehandle,"\n",1);
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2324 drawcachebox(title,numcache);
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2328 // go through and load in anything still needed
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2330 bufferstart = bufferend = 0; // nothing good in buffer now
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2332 for (i=0;i<NUMCHUNKS;i++)
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2333 if ( (gvar->ca.grneeded[i]&(gvar->ca.ca_levelbit)) && !gvar->ca.grsegs[i])
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2336 // update thermometer
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2338 if (dialog && updatecachebox)
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2339 updatecachebox ();
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2341 pos = GRFILEPOS(i,gvar);
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2346 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
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2349 compressed = GRFILEPOS(next,gvar)-pos;
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2350 endpos = pos+compressed;
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2352 if (compressed<=BUFFERSIZE)
\r
2354 if (bufferstart<=pos
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2355 && bufferend>= endpos)
\r
2357 // data is allready in buffer
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2358 source = (byte _seg *)bufferseg+(pos-bufferstart);
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2362 // load buffer with a new block from disk
\r
2363 // try to get as many of the needed blocks in as possible
\r
2364 while ( next < NUMCHUNKS )
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2366 while (next < NUMCHUNKS &&
\r
2367 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2369 if (next == NUMCHUNKS)
\r
2372 nextpos = GRFILEPOS(next,gvar);
\r
2373 while (GRFILEPOS(++next,gvar) == -1) // skip past any sparse tiles
\r
2375 nextendpos = GRFILEPOS(next,gvar);
\r
2376 if (nextpos - endpos <= MAXEMPTYREAD
\r
2377 && nextendpos-pos <= BUFFERSIZE)
\r
2378 endpos = nextendpos;
\r
2380 next = NUMCHUNKS; // read pos to posend
\r
2383 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);
\r
2384 CA_FarRead(gvar->ca.file.grhandle,(gvar->mm.bufferseg),endpos-pos,gvar);
\r
2385 bufferstart = pos;
\r
2386 bufferend = endpos;
\r
2387 source = bufferseg;
\r
2392 // big chunk, allocate temporary buffer
\r
2393 MM_GetPtr(&bigbufferseg,compressed,gvar);
\r
2396 MM_SetLock (&bigbufferseg,true);
\r
2397 lseek(gvar->ca.file.grhandle,pos,SEEK_SET);
\r
2398 CA_FarRead(gvar->ca.file.grhandle,bigbufferseg,compressed,gvar);
\r
2399 source = bigbufferseg;
\r
2402 CAL_ExpandGrChunk (i,source);
\r
2406 if (compressed>BUFFERSIZE)
\r
2407 MM_FreePtr(&bigbufferseg);
\r
2412 // finish up any thermometer remnants
\r
2414 if (dialog && finishcachebox)
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2418 void CA_CannotOpen(char *string, global_game_variables_t *gvar)
\r
2422 strcpy(str,"Can't open ");
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2423 strcat(str,string);
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2424 strcat(str,"!\n");
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