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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42 =============================================================================
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46 =============================================================================
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51 unsigned bit0,bit1; // 0-255 is a character, > is a pointer to a node
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58 long headeroffsets[100];
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64 =============================================================================
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68 =============================================================================
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74 unsigned _seg *mapsegs[3];
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75 maptype _seg *mapheaderseg[NUMMAPS];
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76 byte _seg *audiosegs[NUMSNDCHUNKS];
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77 void _seg *grsegs[NUMCHUNKS];
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79 byte far grneeded[NUMCHUNKS];
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80 byte ca_levelbit,ca_levelnum;*/
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82 void (*drawcachebox) (char *title, unsigned numcache);
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83 void (*updatecachebox) (void);
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84 void (*finishcachebox) (void);
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87 =============================================================================
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91 =============================================================================
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94 /*extern long far CGAhead;
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95 extern long far EGAhead;
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96 extern byte CGAdict;
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97 extern byte EGAdict;
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98 extern byte far maphead;
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99 extern byte mapdict;
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100 extern byte far audiohead;
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101 extern byte audiodict;
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104 long _seg *grstarts; // array of offsets in egagraph, -1 for sparse
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105 long _seg *audiostarts; // array of offsets in audio / audiot
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107 #ifdef GRHEADERLINKED
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108 huffnode *grhuffman;
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110 huffnode grhuffman[255];
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113 #ifdef AUDIOHEADERLINKED
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114 huffnode *audiohuffman;
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116 huffnode audiohuffman[255];
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120 int grhandle; // handle to EGAGRAPH
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121 int maphandle; // handle to MAPTEMP / GAMEMAPS
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122 int audiohandle; // handle to AUDIOT / AUDIO
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124 long chunkcomplen,chunkexplen;
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126 SDMode oldsoundmode;
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130 void CAL_DialogDraw (char *title,unsigned numcache);
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131 void CAL_DialogUpdate (void);
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132 void CAL_DialogFinish (void);*/
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133 //void CAL_CarmackExpand (unsigned far *source, unsigned far *dest,unsigned length);
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136 /*++++#ifdef THREEBYTEGRSTARTS
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137 #define FILEPOSSIZE 3
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138 //#define GRFILEPOS(c) (*(long far *)(((byte far *)grstarts)+(c)*3)&0xffffff)
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139 long GRFILEPOS(int c)
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146 value = *(long far *)(((byte far *)grstarts)+offset);
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148 value &= 0x00ffffffl;
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150 if (value == 0xffffffl)
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156 #define FILEPOSSIZE 4
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157 #define GRFILEPOS(c) (grstarts[c])
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161 =============================================================================
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165 =============================================================================
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169 ============================
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171 = CA_OpenDebug / CA_CloseDebug
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173 = Opens a binary file with the handle "debughandle"
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175 ============================
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177 void CA_OpenDebug(global_game_variables_t *gvar)
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179 #ifdef __BORLANDC__
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180 unlink("debug.16b");
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181 gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);
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184 unlink("debug.16w");
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185 gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);
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189 void CA_CloseDebug(global_game_variables_t *gvar)
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191 close(gvar->handle.debughandle);
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197 ============================
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199 = CAL_GetGrChunkLength
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201 = Gets the length of an explicit length chunk (not tiles)
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202 = The file pointer is positioned so the compressed data can be read in next.
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204 ============================
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207 void CAL_GetGrChunkLength (int chunk)
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209 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
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210 read(grhandle,&chunkexplen,sizeof(chunkexplen));
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211 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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216 ==========================
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220 = Read from a file to a far pointer
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222 ==========================
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225 boolean CA_FarRead(int handle, byte huge *dest, dword length, mminfo_t *mm)
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230 //if(mm->EMSVer<0x40)
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231 if(length>0xfffflu)
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233 printf("File is a fat bakapee\n");
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234 //segm=(length%0xfffflu)-1;
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235 //fat=segm*0xfffflu;
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237 // printf("CA_FarRead doesn't support 64K reads yet!\n");
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238 return 0;//TODO: EXPAND!!!
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246 mov cx,[WORD PTR length]
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247 mov dx,[WORD PTR dest]
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248 mov ds,[WORD PTR dest+2]
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249 mov ah,0x3f // READ w/handle
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256 #ifdef __BORLANDC__
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260 #ifdef __BORLANDC__
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263 cmp ax,[WORD PTR length]
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265 // errno = EINVFMT; // user manager knows this is bad read
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268 #ifdef __BORLANDC__
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272 #ifdef __BORLANDC__
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276 #ifdef __BORLANDC__
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288 ==========================
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292 = Write from a file to a far pointer
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294 ==========================
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297 boolean CA_FarWrite(int handle, byte huge *source, dword length, mminfo_t *mm)
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302 //if(mm->EMSVer<0x40)
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303 if(length>0xfffflu)
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305 printf("File is a fat bakapee\n");
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306 //segm=(length%0xfffflu)-1;
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307 //fat=segm*0xfffflu;
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309 // printf("CA_FarRead doesn't support 64K reads yet!\n");
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318 mov cx,[WORD PTR length]
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319 mov dx,[WORD PTR source]
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320 mov ds,[WORD PTR source+2]
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321 mov ah,0x40 // WRITE w/handle
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328 #ifdef __BORLANDC__
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332 #ifdef __BORLANDC__
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335 cmp ax,[WORD PTR length]
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337 //errno = ENOMEM; // user manager knows this is bad write
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340 #ifdef __BORLANDC__
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344 #ifdef __BORLANDC__
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348 #ifdef __BORLANDC__
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360 ==========================
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364 = Reads a file into an allready allocated buffer
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366 ==========================
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369 boolean CA_ReadFile(char *filename, memptr *ptr, mminfo_t *mm)
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375 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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378 size = filelength(handle);
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379 if(!CA_FarRead(handle,*ptr,size, mm))
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390 ==========================
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394 = Writes a file from a memory buffer
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396 ==========================
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399 boolean CA_WriteFile (char *filename, void far *ptr, long length, mminfo_t *mm)
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405 handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,
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406 S_IREAD | S_IWRITE | S_IFREG);
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411 if (!CA_FarWrite (handle,ptr,length, mm))
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423 ==========================
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427 = Allocate space for and load a file
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429 ==========================
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432 boolean CA_LoadFile(char *filename, memptr *ptr, mminfo_t *mm, mminfotype *mmi)
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438 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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441 size = filelength (handle);
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442 MM_GetPtr(ptr,size, mm, mmi);
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443 if(!CA_FarRead(handle,*ptr,size, mm))
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453 ============================================================================
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455 COMPRESSION routines, see JHUFF.C for more
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457 ============================================================================
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465 = CAL_OptimizeNodes
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467 = Goes through a huffman table and changes the 256-511 node numbers to the
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468 = actular address of the node. Must be called before CAL_HuffExpand
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473 void CAL_OptimizeNodes(huffnode *table)
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480 for (i=0;i<255;i++)
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482 if (node->bit0 >= 256)
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483 node->bit0 = (unsigned)(table+(node->bit0-256));
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484 if (node->bit1 >= 256)
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485 node->bit1 = (unsigned)(table+(node->bit1-256));
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493 ======================
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497 = Length is the length of the EXPANDED data
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499 ======================
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502 /*++++void CAL_HuffExpand (byte huge *source, byte huge *dest,
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503 long length,huffnode *hufftable)
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505 // unsigned bit,byte,node,code;
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506 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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508 // huffnode *nodeon;
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510 headptr = hufftable+254; // head node is allways node 254
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512 source++; // normalize
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517 sourceseg = FP_SEG(source);
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518 sourceoff = FP_OFF(source);
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519 destseg = FP_SEG(dest);
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520 destoff = FP_OFF(dest);
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521 endoff = destoff+length;
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526 // ss:bx node pointer
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529 if (length <0xfff0)
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532 //--------------------------
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533 // expand less than 64k of data
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534 //--------------------------
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546 mov ch,[si] // load first byte
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551 test ch,cl // bit set?
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553 mov dx,[ss:bx] // take bit0 path from node
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554 shl cl,1 // advance to next bit position
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559 asm mov dx,[ss:bx+2] // take bit1 path
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560 asm shl cl,1 // advance to next bit position
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561 asm jnc sourceupshort
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564 asm mov ch,[si] // load next byte
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566 asm mov cl,1 // back to first bit
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569 asm or dh,dh // if dx<256 its a byte, else move node
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570 asm jz storebyteshort
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571 asm mov bx,dx // next node = (huffnode *)code
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572 asm jmp expandshort
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576 asm inc di // write a decopmpressed byte out
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577 asm mov bx,[headptr] // back to the head node for next bit
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579 asm cmp di,ax // done?
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580 asm jne expandshort
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586 //--------------------------
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587 // expand more than 64k of data
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588 //--------------------------
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594 asm mov bx,[headptr]
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597 asm mov si,[sourceoff]
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598 asm mov di,[destoff]
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599 asm mov es,[destseg]
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600 asm mov ds,[sourceseg]
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602 asm lodsb // load first byte
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605 asm test al,cl // bit set?
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607 asm mov dx,[ss:bx] // take bit0 path from node
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610 asm mov dx,[ss:bx+2] // take bit1 path
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613 asm shl cl,1 // advance to next bit position
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616 asm cmp si,0x10 // normalize ds:si
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623 asm mov cl,1 // back to first bit
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626 asm or dh,dh // if dx<256 its a byte, else move node
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628 asm mov bx,dx // next node = (huffnode *)code
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633 asm inc di // write a decopmpressed byte out
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634 asm mov bx,[headptr] // back to the head node for next bit
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636 asm cmp di,0x10 // normalize es:di
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644 asm sub [WORD PTR ss:length],1
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646 asm dec [WORD PTR ss:length+2]
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647 asm jns expand // when length = ffff ffff, done
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661 ======================
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663 = CAL_CarmackExpand
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665 = Length is the length of the EXPANDED data
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667 ======================
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670 #define NEARTAG 0xa7
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671 #define FARTAG 0xa8
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673 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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675 unsigned ch,chhigh,count,offset;
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676 unsigned far *copyptr, far *inptr, far *outptr;
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687 if (chhigh == NEARTAG)
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691 { // have to insert a word containing the tag byte
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692 ch |= *((unsigned char far *)inptr)++;
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698 offset = *((unsigned char far *)inptr)++;
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699 copyptr = outptr - offset;
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702 *outptr++ = *copyptr++;
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705 else if (chhigh == FARTAG)
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709 { // have to insert a word containing the tag byte
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710 ch |= *((unsigned char far *)inptr)++;
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717 copyptr = dest + offset;
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720 *outptr++ = *copyptr++;
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734 ======================
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738 ======================
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741 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
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745 unsigned value,count,i;
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746 unsigned huge *start,huge *end;
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750 end = source + (length+1)/2;
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759 while (*source == value && source<end)
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764 if (count>3 || value == rlewtag)
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767 // send a tag / count / value string
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776 // send word without compressing
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778 for (i=1;i<=count;i++)
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782 } while (source<end);
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784 complength = 2*(dest-start);
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790 ======================
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793 = length is EXPANDED length
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795 ======================
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798 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
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801 // unsigned value,count,i;
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802 unsigned huge *end;
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803 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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813 if (value != rlewtag)
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821 // compressed string
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825 for (i=1;i<=count;i++)
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828 } while (dest<end);
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831 end = dest + (length)/2;
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832 sourceseg = FP_SEG(source);
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833 sourceoff = FP_OFF(source);
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834 destseg = FP_SEG(dest);
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835 destoff = FP_OFF(dest);
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836 endseg = FP_SEG(end);
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837 endoff = FP_OFF(end);
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841 // ax = source value
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843 // cx = repeat counts
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846 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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850 asm mov si,sourceoff
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853 asm mov ds,sourceseg
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864 asm mov cx,ax // repeat count
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865 asm lodsw // repeat value
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870 asm cmp si,0x10 // normalize ds:si
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882 asm cmp di,0x10 // normalize es:di
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895 asm cmp di,ss:endoff
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898 asm cmp ax,ss:endseg
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909 =============================================================================
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911 CACHE MANAGER ROUTINES
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913 =============================================================================
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917 ======================
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921 ======================
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924 /*void CAL_SetupGrFile (void)
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929 #ifdef GRHEADERLINKED
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931 #if GRMODE == EGAGR
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932 grhuffman = (huffnode *)&EGAdict;
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933 grstarts = (long _seg *)FP_SEG(&EGAhead);
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935 #if GRMODE == CGAGR
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936 grhuffman = (huffnode *)&CGAdict;
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937 grstarts = (long _seg *)FP_SEG(&CGAhead);
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940 CAL_OptimizeNodes (grhuffman);
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945 // load ???dict.ext (huffman dictionary for graphics files)
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948 if ((handle = open(GREXT"DICT."EXT,
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949 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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950 Quit ("Can't open "GREXT"DICT."EXT"!");
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952 read(handle, &grhuffman, sizeof(grhuffman));
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954 CAL_OptimizeNodes (grhuffman);
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956 // load the data offsets from ???head.ext
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958 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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960 if ((handle = open(GREXT"HEAD."EXT,
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961 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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962 Quit ("Can't open "GREXT"HEAD."EXT"!");
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964 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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972 // Open the graphics file, leaving it open until the game is finished
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974 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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975 if (grhandle == -1)
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976 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
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980 // load the pic and sprite headers into the arrays in the data segment
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983 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
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984 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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985 MM_GetPtr(&compseg,chunkcomplen);
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986 CA_FarRead (grhandle,compseg,chunkcomplen);
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987 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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988 MM_FreePtr(&compseg);
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992 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
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993 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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994 MM_GetPtr(&compseg,chunkcomplen);
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995 CA_FarRead (grhandle,compseg,chunkcomplen);
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996 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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997 MM_FreePtr(&compseg);
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1001 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
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1002 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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1003 MM_GetPtr(&compseg,chunkcomplen);
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1004 CA_FarRead (grhandle,compseg,chunkcomplen);
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1005 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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1006 MM_FreePtr(&compseg);
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1011 //==========================================================================
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1015 ======================
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1017 = CAL_SetupMapFile
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1019 ======================
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1022 /*void CAL_SetupMapFile (void)
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1028 // load maphead.ext (offsets and tileinfo for map file)
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1030 #ifndef MAPHEADERLINKED
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1031 if ((handle = open("MAPHEAD."EXT,
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1032 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1033 Quit ("Can't open MAPHEAD."EXT"!");
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1034 length = filelength(handle);
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1035 MM_GetPtr (&(memptr)tinf,length);
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1036 CA_FarRead(handle, tinf, length);
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1040 tinf = (byte _seg *)FP_SEG(&maphead);
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1045 // open the data file
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1047 #ifdef MAPHEADERLINKED
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1048 if ((maphandle = open("GAMEMAPS."EXT,
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1049 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1050 Quit ("Can't open GAMEMAPS."EXT"!");
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1052 if ((maphandle = open("MAPTEMP."EXT,
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1053 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1054 Quit ("Can't open MAPTEMP."EXT"!");
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1058 //==========================================================================
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1062 ======================
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1064 = CAL_SetupAudioFile
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1066 ======================
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1069 /*void CAL_SetupAudioFile (void)
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1075 // load maphead.ext (offsets and tileinfo for map file)
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1077 #ifndef AUDIOHEADERLINKED
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1078 if ((handle = open("AUDIOHED."EXT,
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1079 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1080 Quit ("Can't open AUDIOHED."EXT"!");
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1081 length = filelength(handle);
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1082 MM_GetPtr (&(memptr)audiostarts,length);
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1083 CA_FarRead(handle, (byte far *)audiostarts, length);
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1086 audiohuffman = (huffnode *)&audiodict;
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1087 CAL_OptimizeNodes (audiohuffman);
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1088 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1092 // open the data file
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1094 #ifndef AUDIOHEADERLINKED
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1095 if ((audiohandle = open("AUDIOT."EXT,
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1096 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1097 Quit ("Can't open AUDIOT."EXT"!");
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1099 if ((audiohandle = open("AUDIO."EXT,
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1100 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1101 Quit ("Can't open AUDIO."EXT"!");
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1105 //==========================================================================
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1109 ======================
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1113 = Open all files and load in headers
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1115 ======================
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1118 void CA_Startup(global_game_variables_t *gvar)
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1121 #ifdef __BORLANDC__
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1122 unlink("profile.16b");
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1123 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
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1125 #ifdef __WATCOMC__
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1126 unlink("profile.16w");
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1127 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
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1130 // unlink("debug0.16");
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1131 // gvar->handle.showmemhandle = open("debug0.16", O_CREAT | O_WRONLY | O_TEXT);
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1133 // MDM begin - (GAMERS EDGE)
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1135 if(!FindFile("AUDIO."EXT,NULL,2))
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1136 Quit("CA_Startup(): Can't find audio files.");
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1141 CAL_SetupAudioFile();
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1144 // MDM begin - (GAMERS EDGE)
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1146 if (!FindFile("GAMEMAPS."EXT,NULL,1))
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1147 Quit("CA_Startup(): Can't find level files.");
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1152 CAL_SetupMapFile ();
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1155 // MDM begin - (GAMERS EDGE)
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1157 if (!FindFile("EGAGRAPH."EXT,NULL,2))
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1158 Quit("CA_Startup(): Can't find graphics files.");
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1162 #ifndef NOGRAPHICS
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1163 CAL_SetupGrFile ();
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1170 drawcachebox = CAL_DialogDraw;
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1171 updatecachebox = CAL_DialogUpdate;
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1172 finishcachebox = CAL_DialogFinish;*/
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1175 //==========================================================================
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1179 ======================
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1183 = Closes all files
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1185 ======================
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1188 void CA_Shutdown(global_game_variables_t *gvar)
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1191 close(gvar->handle.profilehandle);
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1193 // close(gvar->handle.showmemhandle);
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1197 close(audiohandle);*/
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1200 //===========================================================================
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1203 ======================
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1205 = CA_CacheAudioChunk
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1207 ======================
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1210 void CA_CacheAudioChunk (int chunk)
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1212 long pos,compressed;
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1213 #ifdef AUDIOHEADERLINKED
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1215 memptr bigbufferseg;
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1219 if (audiosegs[chunk])
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1221 MM_SetPurge (&(memptr)audiosegs[chunk],0);
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1222 return; // allready in memory
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1225 // MDM begin - (GAMERS EDGE)
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1227 if (!FindFile("AUDIO."EXT,NULL,2))
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1228 Quit("CA_CacheAudioChunk(): Can't find audio files.");
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1233 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
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1234 // a larger buffer
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1236 pos = audiostarts[chunk];
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1237 compressed = audiostarts[chunk+1]-pos;
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1239 lseek(audiohandle,pos,SEEK_SET);
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1241 #ifndef AUDIOHEADERLINKED
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1243 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
\r
1247 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1251 if (compressed<=BUFFERSIZE)
\r
1253 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1254 source = bufferseg;
\r
1258 MM_GetPtr(&bigbufferseg,compressed);
\r
1261 MM_SetLock (&bigbufferseg,true);
\r
1262 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1263 source = bigbufferseg;
\r
1266 expanded = *(long far *)source;
\r
1267 source += 4; // skip over length
\r
1268 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
\r
1271 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1274 if (compressed>BUFFERSIZE)
\r
1275 MM_FreePtr(&bigbufferseg);
\r
1279 //===========================================================================
\r
1282 ======================
\r
1284 = CA_LoadAllSounds
\r
1286 = Purges all sounds, then loads all new ones (mode switch)
\r
1288 ======================
\r
1291 void CA_LoadAllSounds (void)
\r
1295 switch (oldsoundmode)
\r
1300 start = STARTPCSOUNDS;
\r
1303 start = STARTADLIBSOUNDS;
\r
1307 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1308 if (audiosegs[start])
\r
1309 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
\r
1313 switch (SoundMode)
\r
1318 start = STARTPCSOUNDS;
\r
1321 start = STARTADLIBSOUNDS;
\r
1325 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1326 CA_CacheAudioChunk (start);
\r
1328 oldsoundmode = SoundMode;
\r
1331 //===========================================================================
\r
1333 //++++#if GRMODE == EGAGR
\r
1336 ======================
\r
1340 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1342 ======================
\r
1345 unsigned static sheight,swidth;
\r
1346 boolean static dothemask;
\r
1348 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1349 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1352 sheight = height; // because we are going to reassign bp
\r
1354 dothemask = domask;
\r
1356 asm mov ax,[segment]
\r
1357 asm mov ds,ax // source and dest are in same segment, and all local
\r
1359 asm mov bx,[source]
\r
1362 asm mov bp,[pixshift]
\r
1364 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1366 asm cmp [ss:dothemask],0
\r
1370 // table shift the mask
\r
1372 asm mov dx,[ss:sheight]
\r
1376 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1377 asm mov cx,ss:[swidth]
\r
1381 asm mov al,[bx] // source
\r
1383 asm inc bx // next source byte
\r
1387 asm mov ax,[bp+si] // table shift into two bytes
\r
1389 asm and [di],al // and with first byte
\r
1391 asm mov [di],ah // replace next byte
\r
1393 asm loop domaskbyte
\r
1395 asm inc di // the last shifted byte has 1s in it
\r
1402 // table shift the data
\r
1404 asm mov dx,ss:[sheight]
\r
1406 asm shl dx,1 // four planes of data
\r
1410 asm mov BYTE PTR [di],0 // 0 first byte
\r
1411 asm mov cx,ss:[swidth]
\r
1415 asm mov al,[bx] // source
\r
1416 asm inc bx // next source byte
\r
1420 asm mov ax,[bp+si] // table shift into two bytes
\r
1421 asm or [di],al // or with first byte
\r
1423 asm mov [di],ah // replace next byte
\r
1425 asm loop dodatabyte
\r
1427 asm inc di // the last shifted byte has 0s in it
\r
1435 asm mov ax,ss // restore data segment
\r
1442 //===========================================================================
\r
1445 ======================
\r
1449 = Generate shifts and set up sprite structure for a given sprite
\r
1451 ======================
\r
1454 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1457 unsigned shiftstarts[5];
\r
1458 unsigned smallplane,bigplane,expanded;
\r
1459 spritetabletype far *spr;
\r
1460 spritetype _seg *dest;
\r
1462 #if GRMODE == CGAGR
\r
1464 // CGA has no pel panning, so shifts are never needed
\r
1466 spr = &spritetable[chunk-STARTSPRITES];
\r
1467 smallplane = spr->width*spr->height;
\r
1468 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1471 dest = (spritetype _seg *)grsegs[chunk];
\r
1472 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1473 dest->planesize[0] = smallplane;
\r
1474 dest->width[0] = spr->width;
\r
1477 // expand the unshifted shape
\r
1479 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1484 #if GRMODE == EGAGR
\r
1487 // calculate sizes
\r
1489 spr = &spritetable[chunk-STARTSPRITES];
\r
1490 smallplane = spr->width*spr->height;
\r
1491 bigplane = (spr->width+1)*spr->height;
\r
1493 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1494 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1495 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1496 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1497 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1499 expanded = shiftstarts[spr->shifts];
\r
1500 MM_GetPtr (&grsegs[chunk],expanded);
\r
1503 dest = (spritetype _seg *)grsegs[chunk];
\r
1506 // expand the unshifted shape
\r
1508 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1511 // make the shifts!
\r
1513 switch (spr->shifts)
\r
1518 dest->sourceoffset[i] = shiftstarts[0];
\r
1519 dest->planesize[i] = smallplane;
\r
1520 dest->width[i] = spr->width;
\r
1527 dest->sourceoffset[i] = shiftstarts[0];
\r
1528 dest->planesize[i] = smallplane;
\r
1529 dest->width[i] = spr->width;
\r
1533 dest->sourceoffset[i] = shiftstarts[1];
\r
1534 dest->planesize[i] = bigplane;
\r
1535 dest->width[i] = spr->width+1;
\r
1537 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1538 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1542 dest->sourceoffset[0] = shiftstarts[0];
\r
1543 dest->planesize[0] = smallplane;
\r
1544 dest->width[0] = spr->width;
\r
1546 dest->sourceoffset[1] = shiftstarts[1];
\r
1547 dest->planesize[1] = bigplane;
\r
1548 dest->width[1] = spr->width+1;
\r
1549 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1550 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1552 dest->sourceoffset[2] = shiftstarts[2];
\r
1553 dest->planesize[2] = bigplane;
\r
1554 dest->width[2] = spr->width+1;
\r
1555 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1556 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1558 dest->sourceoffset[3] = shiftstarts[3];
\r
1559 dest->planesize[3] = bigplane;
\r
1560 dest->width[3] = spr->width+1;
\r
1561 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1562 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1567 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1573 //===========================================================================
\r
1577 ======================
\r
1579 = CAL_ExpandGrChunk
\r
1581 = Does whatever is needed with a pointer to a compressed chunk
\r
1583 ======================
\r
1586 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1591 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1594 // expanded sizes of tile8/16/32 are implicit
\r
1597 #if GRMODE == EGAGR
\r
1599 #define MASKBLOCK 40
\r
1602 #if GRMODE == CGAGR
\r
1604 #define MASKBLOCK 32
\r
1607 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1608 expanded = BLOCK*NUMTILE8;
\r
1609 else if (chunk<STARTTILE16)
\r
1610 expanded = MASKBLOCK*NUMTILE8M;
\r
1611 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1612 expanded = BLOCK*4;
\r
1613 else if (chunk<STARTTILE32)
\r
1614 expanded = MASKBLOCK*4;
\r
1615 else if (chunk<STARTTILE32M)
\r
1616 expanded = BLOCK*16;
\r
1618 expanded = MASKBLOCK*16;
\r
1623 // everything else has an explicit size longword
\r
1625 expanded = *(long far *)source;
\r
1626 source += 4; // skip over length
\r
1630 // allocate final space, decompress it, and free bigbuffer
\r
1631 // Sprites need to have shifts made and various other junk
\r
1633 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1634 CAL_CacheSprite(chunk,source);
\r
1637 MM_GetPtr (&grsegs[chunk],expanded);
\r
1640 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1646 ======================
\r
1650 = Gets a chunk off disk, optimizing reads to general buffer
\r
1652 ======================
\r
1655 void CAL_ReadGrChunk (int chunk)
\r
1657 long pos,compressed;
\r
1658 memptr bigbufferseg;
\r
1663 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1664 // a larger buffer
\r
1666 pos = GRFILEPOS(chunk);
\r
1667 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1671 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1674 compressed = GRFILEPOS(next)-pos;
\r
1676 lseek(grhandle,pos,SEEK_SET);
\r
1678 if (compressed<=BUFFERSIZE)
\r
1680 CA_FarRead(grhandle,bufferseg,compressed);
\r
1681 source = bufferseg;
\r
1685 MM_GetPtr(&bigbufferseg,compressed);
\r
1688 MM_SetLock (&bigbufferseg,true);
\r
1689 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1690 source = bigbufferseg;
\r
1693 CAL_ExpandGrChunk (chunk,source);
\r
1695 if (compressed>BUFFERSIZE)
\r
1696 MM_FreePtr(&bigbufferseg);
\r
1700 ======================
\r
1704 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1706 ======================
\r
1709 void CA_CacheGrChunk (int chunk)
\r
1711 long pos,compressed;
\r
1712 memptr bigbufferseg;
\r
1716 grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1717 if (grsegs[chunk])
\r
1719 MM_SetPurge (&grsegs[chunk],0);
\r
1720 return; // allready in memory
\r
1723 // MDM begin - (GAMERS EDGE)
\r
1725 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1726 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1731 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1732 // a larger buffer
\r
1734 pos = GRFILEPOS(chunk);
\r
1735 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1739 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1742 compressed = GRFILEPOS(next)-pos;
\r
1744 lseek(grhandle,pos,SEEK_SET);
\r
1746 if (compressed<=BUFFERSIZE)
\r
1748 CA_FarRead(grhandle,bufferseg,compressed);
\r
1749 source = bufferseg;
\r
1753 MM_GetPtr(&bigbufferseg,compressed);
\r
1754 MM_SetLock (&bigbufferseg,true);
\r
1755 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1756 source = bigbufferseg;
\r
1759 CAL_ExpandGrChunk (chunk,source);
\r
1761 if (compressed>BUFFERSIZE)
\r
1762 MM_FreePtr(&bigbufferseg);
\r
1767 //==========================================================================
\r
1770 ======================
\r
1774 ======================
\r
1777 void CA_CacheMap (int mapnum)
\r
1779 long pos,compressed;
\r
1781 memptr *dest,bigbufferseg;
\r
1783 unsigned far *source;
\r
1784 #ifdef MAPHEADERLINKED
\r
1785 memptr buffer2seg;
\r
1790 // MDM begin - (GAMERS EDGE)
\r
1792 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1793 Quit("CA_CacheMap(): Can't find level files.");
\r
1799 // free up memory from last map
\r
1801 if (mapon>-1 && mapheaderseg[mapon])
\r
1802 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1803 for (plane=0;plane<MAPPLANES;plane++)
\r
1804 if (mapsegs[plane])
\r
1805 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1811 // load map header
\r
1812 // The header will be cached if it is still around
\r
1814 if (!mapheaderseg[mapnum])
\r
1816 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1817 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1818 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1820 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1821 lseek(maphandle,pos,SEEK_SET);
\r
1822 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1825 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1828 // load the planes in
\r
1829 // If a plane's pointer still exists it will be overwritten (levels are
\r
1830 // allways reloaded, never cached)
\r
1833 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1835 for (plane = 0; plane<MAPPLANES; plane++)
\r
1837 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1838 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1841 continue; // the plane is not used in this game
\r
1843 dest = &(memptr)mapsegs[plane];
\r
1844 MM_GetPtr(dest,size);
\r
1846 lseek(maphandle,pos,SEEK_SET);
\r
1847 if (compressed<=BUFFERSIZE)
\r
1848 source = bufferseg;
\r
1851 MM_GetPtr(&bigbufferseg,compressed);
\r
1852 MM_SetLock (&bigbufferseg,true);
\r
1853 source = bigbufferseg;
\r
1856 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1857 #ifdef MAPHEADERLINKED
\r
1859 // unhuffman, then unRLEW
\r
1860 // The huffman'd chunk has a two byte expanded length first
\r
1861 // The resulting RLEW chunk also does, even though it's not really
\r
1864 expanded = *source;
\r
1866 MM_GetPtr (&buffer2seg,expanded);
\r
1867 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1868 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1869 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1870 MM_FreePtr (&buffer2seg);
\r
1874 // unRLEW, skipping expanded length
\r
1876 CA_RLEWexpand (source+1, *dest,size,
\r
1877 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1880 if (compressed>BUFFERSIZE)
\r
1881 MM_FreePtr(&bigbufferseg);
\r
1885 //===========================================================================
\r
1888 ======================
\r
1892 = Goes up a bit level in the needed lists and clears it out.
\r
1893 = Everything is made purgable
\r
1895 ======================
\r
1898 void CA_UpLevel (void)
\r
1900 if (ca_levelnum==7)
\r
1901 Quit ("CA_UpLevel: Up past level 7!");
\r
1907 //===========================================================================
\r
1910 ======================
\r
1914 = Goes down a bit level in the needed lists and recaches
\r
1915 = everything from the lower level
\r
1917 ======================
\r
1920 void CA_DownLevel (void)
\r
1923 Quit ("CA_DownLevel: Down past level 0!");
\r
1926 CA_CacheMarks(NULL);
\r
1929 //===========================================================================
\r
1932 ======================
\r
1936 = Clears out all the marks at the current level
\r
1938 ======================
\r
1941 void CA_ClearMarks (void)
\r
1945 for (i=0;i<NUMCHUNKS;i++)
\r
1946 grneeded[i]&=~ca_levelbit;
\r
1950 //===========================================================================
\r
1953 ======================
\r
1955 = CA_ClearAllMarks
\r
1957 = Clears out all the marks on all the levels
\r
1959 ======================
\r
1962 void CA_ClearAllMarks (void)
\r
1964 _fmemset (grneeded,0,sizeof(grneeded));
\r
1970 //===========================================================================
\r
1973 ======================
\r
1977 ======================
\r
1980 void CA_SetGrPurge (void)
\r
1989 for (i=0;i<NUMCHUNKS;i++)
\r
1991 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1996 ======================
\r
2000 = Make everything possible purgable
\r
2002 ======================
\r
2005 void CA_SetAllPurge (void)
\r
2012 // free cursor sprite and background save
\r
2017 // free map headers and map planes
\r
2019 for (i=0;i<NUMMAPS;i++)
\r
2020 if (mapheaderseg[i])
\r
2021 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
2025 MM_FreePtr (&(memptr)mapsegs[i]);
\r
2030 for (i=0;i<NUMSNDCHUNKS;i++)
\r
2032 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
2037 CA_FreeGraphics ();
\r
2041 void CA_SetGrPurge (void)
\r
2048 for (i=0;i<NUMCHUNKS;i++)
\r
2050 MM_SetPurge (&(memptr)grsegs[i],3);
\r
2054 //===========================================================================
\r
2058 ======================
\r
2062 ======================
\r
2065 #define NUMBARS (17l*8)
\r
2068 unsigned thx,thy,lastx;
\r
2069 long barx,barstep;
\r
2071 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2073 unsigned homex,homey,x;
\r
2075 barstep = (NUMBARS<<16)/numcache;
\r
2078 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2080 US_CenterWindow (20,8);
\r
2084 US_CPrint ("Loading");
\r
2085 fontcolor = F_SECONDCOLOR;
\r
2086 US_CPrint (title);
\r
2087 fontcolor = F_BLACK;
\r
2090 // draw thermometer bar
\r
2094 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2095 VWB_DrawTile8(thx,thy+8,3);
\r
2096 VWB_DrawTile8(thx,thy+16,6);
\r
2097 VWB_DrawTile8(thx+17*8,thy,2);
\r
2098 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2099 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2100 for (x=thx+8;x<thx+17*8;x+=8)
\r
2102 VWB_DrawTile8(x,thy,1);
\r
2103 VWB_DrawTile8(x,thy+8,4);
\r
2104 VWB_DrawTile8(x,thy+16,7);
\r
2107 thx += 4; // first line location
\r
2109 barx = (long)thx<<16;
\r
2112 VW_UpdateScreen();
\r
2117 ======================
\r
2119 = CAL_DialogUpdate
\r
2121 ======================
\r
2124 void CAL_DialogUpdate (void)
\r
2130 if (xh - lastx > BARSTEP)
\r
2132 for (x=lastx;x<=xh;x++)
\r
2133 #if GRMODE == EGAGR
\r
2134 VWB_Vlin (thy,thy+13,x,14);
\r
2136 #if GRMODE == CGAGR
\r
2137 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2140 VW_UpdateScreen();
\r
2145 ======================
\r
2147 = CAL_DialogFinish
\r
2149 ======================
\r
2152 void CAL_DialogFinish (void)
\r
2156 xh = thx + NUMBARS;
\r
2157 for (x=lastx;x<=xh;x++)
\r
2158 #if GRMODE == EGAGR
\r
2159 VWB_Vlin (thy,thy+13,x,14);
\r
2161 #if GRMODE == CGAGR
\r
2162 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2164 VW_UpdateScreen();
\r
2168 //===========================================================================
\r
2171 ======================
\r
2175 ======================
\r
2177 #define MAXEMPTYREAD 1024
\r
2179 void CA_CacheMarks (char *title)
\r
2182 int i,next,numcache;
\r
2183 long pos,endpos,nextpos,nextendpos,compressed;
\r
2184 long bufferstart,bufferend; // file position of general buffer
\r
2186 memptr bigbufferseg;
\r
2188 dialog = (title!=NULL);
\r
2192 // go through and make everything not needed purgable
\r
2194 for (i=0;i<NUMCHUNKS;i++)
\r
2195 if (grneeded[i]&ca_levelbit)
\r
2197 if (grsegs[i]) // its allready in memory, make
\r
2198 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2204 if (grsegs[i]) // not needed, so make it purgeable
\r
2205 MM_SetPurge(&grsegs[i],3);
\r
2208 if (!numcache) // nothing to cache!
\r
2211 // MDM begin - (GAMERS EDGE)
\r
2213 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2214 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2221 write(profilehandle,title,strlen(title));
\r
2222 write(profilehandle,"\n",1);
\r
2225 drawcachebox(title,numcache);
\r
2229 // go through and load in anything still needed
\r
2231 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2233 for (i=0;i<NUMCHUNKS;i++)
\r
2234 if ( (grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2237 // update thermometer
\r
2239 if (dialog && updatecachebox)
\r
2240 updatecachebox ();
\r
2242 pos = GRFILEPOS(i);
\r
2247 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2250 compressed = GRFILEPOS(next)-pos;
\r
2251 endpos = pos+compressed;
\r
2253 if (compressed<=BUFFERSIZE)
\r
2255 if (bufferstart<=pos
\r
2256 && bufferend>= endpos)
\r
2258 // data is allready in buffer
\r
2259 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2263 // load buffer with a new block from disk
\r
2264 // try to get as many of the needed blocks in as possible
\r
2265 while ( next < NUMCHUNKS )
\r
2267 while (next < NUMCHUNKS &&
\r
2268 !(grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2270 if (next == NUMCHUNKS)
\r
2273 nextpos = GRFILEPOS(next);
\r
2274 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2276 nextendpos = GRFILEPOS(next);
\r
2277 if (nextpos - endpos <= MAXEMPTYREAD
\r
2278 && nextendpos-pos <= BUFFERSIZE)
\r
2279 endpos = nextendpos;
\r
2281 next = NUMCHUNKS; // read pos to posend
\r
2284 lseek(grhandle,pos,SEEK_SET);
\r
2285 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2286 bufferstart = pos;
\r
2287 bufferend = endpos;
\r
2288 source = bufferseg;
\r
2293 // big chunk, allocate temporary buffer
\r
2294 MM_GetPtr(&bigbufferseg,compressed);
\r
2297 MM_SetLock (&bigbufferseg,true);
\r
2298 lseek(grhandle,pos,SEEK_SET);
\r
2299 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2300 source = bigbufferseg;
\r
2303 CAL_ExpandGrChunk (i,source);
\r
2307 if (compressed>BUFFERSIZE)
\r
2308 MM_FreePtr(&bigbufferseg);
\r
2313 // finish up any thermometer remnants
\r
2315 if (dialog && finishcachebox)
\r