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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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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284 //}else return 0;//todo: EXPAND!!!
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289 ==========================
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293 = Write from a file to a far pointer
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295 ==========================
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298 boolean CA_FarWrite(int handle, byte huge *source, dword length, mminfo_t *mm)
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303 //if(mm->EMSVer<0x40)
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304 if(length>0xfffflu)
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306 printf("File is a fat bakapee\n");
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307 //segm=(length%0xfffflu)-1;
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308 //fat=segm*0xfffflu;
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310 // printf("CA_FarRead doesn't support 64K reads yet!\n");
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319 mov cx,[WORD PTR length]
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320 mov dx,[WORD PTR source]
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321 mov ds,[WORD PTR source+2]
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322 mov ah,0x40 // WRITE w/handle
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329 #ifdef __BORLANDC__
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333 #ifdef __BORLANDC__
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336 cmp ax,[WORD PTR length]
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338 //errno = ENOMEM; // user manager knows this is bad write
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341 #ifdef __BORLANDC__
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345 #ifdef __BORLANDC__
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349 #ifdef __BORLANDC__
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362 ==========================
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366 = Reads a file into an allready allocated buffer
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368 ==========================
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371 boolean CA_ReadFile(char *filename, memptr *ptr, mminfo_t *mm)
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377 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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380 size = filelength(handle);
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381 if(!CA_FarRead(handle,*ptr,size, mm))
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393 ==========================
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397 = Allocate space for and load a file
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399 ==========================
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402 boolean CA_LoadFile(char *filename, memptr *ptr, mminfo_t *mm, mminfotype *mmi)
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408 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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411 size = filelength (handle);
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412 MM_GetPtr(ptr,size, mm, mmi);
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413 if(!CA_FarRead(handle,*ptr,size, mm))
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423 ============================================================================
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425 COMPRESSION routines, see JHUFF.C for more
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427 ============================================================================
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435 = CAL_OptimizeNodes
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437 = Goes through a huffman table and changes the 256-511 node numbers to the
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438 = actular address of the node. Must be called before CAL_HuffExpand
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443 void CAL_OptimizeNodes(huffnode *table)
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450 for (i=0;i<255;i++)
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452 if (node->bit0 >= 256)
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453 node->bit0 = (unsigned)(table+(node->bit0-256));
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454 if (node->bit1 >= 256)
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455 node->bit1 = (unsigned)(table+(node->bit1-256));
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463 ======================
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467 = Length is the length of the EXPANDED data
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469 ======================
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472 /*++++void CAL_HuffExpand (byte huge *source, byte huge *dest,
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473 long length,huffnode *hufftable)
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475 // unsigned bit,byte,node,code;
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476 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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478 // huffnode *nodeon;
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480 headptr = hufftable+254; // head node is allways node 254
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482 source++; // normalize
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487 sourceseg = FP_SEG(source);
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488 sourceoff = FP_OFF(source);
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489 destseg = FP_SEG(dest);
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490 destoff = FP_OFF(dest);
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491 endoff = destoff+length;
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496 // ss:bx node pointer
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499 if (length <0xfff0)
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502 //--------------------------
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503 // expand less than 64k of data
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504 //--------------------------
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516 mov ch,[si] // load first byte
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521 test ch,cl // bit set?
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523 mov dx,[ss:bx] // take bit0 path from node
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524 shl cl,1 // advance to next bit position
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529 asm mov dx,[ss:bx+2] // take bit1 path
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530 asm shl cl,1 // advance to next bit position
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531 asm jnc sourceupshort
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534 asm mov ch,[si] // load next byte
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536 asm mov cl,1 // back to first bit
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539 asm or dh,dh // if dx<256 its a byte, else move node
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540 asm jz storebyteshort
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541 asm mov bx,dx // next node = (huffnode *)code
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542 asm jmp expandshort
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546 asm inc di // write a decopmpressed byte out
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547 asm mov bx,[headptr] // back to the head node for next bit
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549 asm cmp di,ax // done?
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550 asm jne expandshort
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556 //--------------------------
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557 // expand more than 64k of data
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558 //--------------------------
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564 asm mov bx,[headptr]
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567 asm mov si,[sourceoff]
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568 asm mov di,[destoff]
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569 asm mov es,[destseg]
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570 asm mov ds,[sourceseg]
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572 asm lodsb // load first byte
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575 asm test al,cl // bit set?
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577 asm mov dx,[ss:bx] // take bit0 path from node
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580 asm mov dx,[ss:bx+2] // take bit1 path
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583 asm shl cl,1 // advance to next bit position
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586 asm cmp si,0x10 // normalize ds:si
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593 asm mov cl,1 // back to first bit
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596 asm or dh,dh // if dx<256 its a byte, else move node
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598 asm mov bx,dx // next node = (huffnode *)code
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603 asm inc di // write a decopmpressed byte out
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604 asm mov bx,[headptr] // back to the head node for next bit
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606 asm cmp di,0x10 // normalize es:di
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614 asm sub [WORD PTR ss:length],1
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616 asm dec [WORD PTR ss:length+2]
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617 asm jns expand // when length = ffff ffff, done
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631 ======================
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633 = CAL_CarmackExpand
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635 = Length is the length of the EXPANDED data
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637 ======================
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640 #define NEARTAG 0xa7
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641 #define FARTAG 0xa8
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643 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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645 unsigned ch,chhigh,count,offset;
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646 unsigned far *copyptr, far *inptr, far *outptr;
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657 if (chhigh == NEARTAG)
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661 { // have to insert a word containing the tag byte
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662 ch |= *((unsigned char far *)inptr)++;
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668 offset = *((unsigned char far *)inptr)++;
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669 copyptr = outptr - offset;
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672 *outptr++ = *copyptr++;
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675 else if (chhigh == FARTAG)
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679 { // have to insert a word containing the tag byte
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680 ch |= *((unsigned char far *)inptr)++;
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687 copyptr = dest + offset;
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690 *outptr++ = *copyptr++;
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704 ======================
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708 ======================
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711 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
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715 unsigned value,count,i;
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716 unsigned huge *start,huge *end;
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720 end = source + (length+1)/2;
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729 while (*source == value && source<end)
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734 if (count>3 || value == rlewtag)
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737 // send a tag / count / value string
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746 // send word without compressing
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748 for (i=1;i<=count;i++)
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752 } while (source<end);
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754 complength = 2*(dest-start);
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760 ======================
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763 = length is EXPANDED length
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765 ======================
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768 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
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771 // unsigned value,count,i;
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772 unsigned huge *end;
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773 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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783 if (value != rlewtag)
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791 // compressed string
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795 for (i=1;i<=count;i++)
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798 } while (dest<end);
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801 end = dest + (length)/2;
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802 sourceseg = FP_SEG(source);
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803 sourceoff = FP_OFF(source);
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804 destseg = FP_SEG(dest);
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805 destoff = FP_OFF(dest);
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806 endseg = FP_SEG(end);
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807 endoff = FP_OFF(end);
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811 // ax = source value
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813 // cx = repeat counts
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816 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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820 asm mov si,sourceoff
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823 asm mov ds,sourceseg
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834 asm mov cx,ax // repeat count
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835 asm lodsw // repeat value
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840 asm cmp si,0x10 // normalize ds:si
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852 asm cmp di,0x10 // normalize es:di
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865 asm cmp di,ss:endoff
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868 asm cmp ax,ss:endseg
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879 =============================================================================
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881 CACHE MANAGER ROUTINES
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883 =============================================================================
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887 ======================
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891 ======================
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894 /*void CAL_SetupGrFile (void)
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899 #ifdef GRHEADERLINKED
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901 #if GRMODE == EGAGR
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902 grhuffman = (huffnode *)&EGAdict;
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903 grstarts = (long _seg *)FP_SEG(&EGAhead);
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905 #if GRMODE == CGAGR
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906 grhuffman = (huffnode *)&CGAdict;
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907 grstarts = (long _seg *)FP_SEG(&CGAhead);
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910 CAL_OptimizeNodes (grhuffman);
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915 // load ???dict.ext (huffman dictionary for graphics files)
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918 if ((handle = open(GREXT"DICT."EXT,
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919 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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920 Quit ("Can't open "GREXT"DICT."EXT"!");
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922 read(handle, &grhuffman, sizeof(grhuffman));
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924 CAL_OptimizeNodes (grhuffman);
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926 // load the data offsets from ???head.ext
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928 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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930 if ((handle = open(GREXT"HEAD."EXT,
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931 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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932 Quit ("Can't open "GREXT"HEAD."EXT"!");
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934 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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942 // Open the graphics file, leaving it open until the game is finished
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944 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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945 if (grhandle == -1)
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946 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
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950 // load the pic and sprite headers into the arrays in the data segment
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953 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
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954 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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955 MM_GetPtr(&compseg,chunkcomplen);
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956 CA_FarRead (grhandle,compseg,chunkcomplen);
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957 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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958 MM_FreePtr(&compseg);
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962 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
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963 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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964 MM_GetPtr(&compseg,chunkcomplen);
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965 CA_FarRead (grhandle,compseg,chunkcomplen);
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966 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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967 MM_FreePtr(&compseg);
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971 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
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972 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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973 MM_GetPtr(&compseg,chunkcomplen);
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974 CA_FarRead (grhandle,compseg,chunkcomplen);
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975 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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976 MM_FreePtr(&compseg);
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981 //==========================================================================
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985 ======================
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989 ======================
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992 /*void CAL_SetupMapFile (void)
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998 // load maphead.ext (offsets and tileinfo for map file)
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1000 #ifndef MAPHEADERLINKED
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1001 if ((handle = open("MAPHEAD."EXT,
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1002 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1003 Quit ("Can't open MAPHEAD."EXT"!");
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1004 length = filelength(handle);
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1005 MM_GetPtr (&(memptr)tinf,length);
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1006 CA_FarRead(handle, tinf, length);
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1010 tinf = (byte _seg *)FP_SEG(&maphead);
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1015 // open the data file
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1017 #ifdef MAPHEADERLINKED
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1018 if ((maphandle = open("GAMEMAPS."EXT,
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1019 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1020 Quit ("Can't open GAMEMAPS."EXT"!");
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1022 if ((maphandle = open("MAPTEMP."EXT,
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1023 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1024 Quit ("Can't open MAPTEMP."EXT"!");
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1028 //==========================================================================
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1032 ======================
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1034 = CAL_SetupAudioFile
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1036 ======================
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1039 /*void CAL_SetupAudioFile (void)
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1045 // load maphead.ext (offsets and tileinfo for map file)
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1047 #ifndef AUDIOHEADERLINKED
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1048 if ((handle = open("AUDIOHED."EXT,
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1049 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1050 Quit ("Can't open AUDIOHED."EXT"!");
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1051 length = filelength(handle);
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1052 MM_GetPtr (&(memptr)audiostarts,length);
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1053 CA_FarRead(handle, (byte far *)audiostarts, length);
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1056 audiohuffman = (huffnode *)&audiodict;
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1057 CAL_OptimizeNodes (audiohuffman);
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1058 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1062 // open the data file
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1064 #ifndef AUDIOHEADERLINKED
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1065 if ((audiohandle = open("AUDIOT."EXT,
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1066 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1067 Quit ("Can't open AUDIOT."EXT"!");
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1069 if ((audiohandle = open("AUDIO."EXT,
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1070 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1071 Quit ("Can't open AUDIO."EXT"!");
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1075 //==========================================================================
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1079 ======================
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1083 = Open all files and load in headers
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1085 ======================
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1088 void CA_Startup(global_game_variables_t *gvar)
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1091 #ifdef __BORLANDC__
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1092 unlink("profile.16b");
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1093 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
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1095 #ifdef __WATCOMC__
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1096 unlink("profile.16w");
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1097 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
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1100 // unlink("debug0.16");
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1101 // gvar->handle.showmemhandle = open("debug0.16", O_CREAT | O_WRONLY | O_TEXT);
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1103 // MDM begin - (GAMERS EDGE)
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1105 if(!FindFile("AUDIO."EXT,NULL,2))
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1106 Quit("CA_Startup(): Can't find audio files.");
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1111 CAL_SetupAudioFile();
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1114 // MDM begin - (GAMERS EDGE)
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1116 if (!FindFile("GAMEMAPS."EXT,NULL,1))
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1117 Quit("CA_Startup(): Can't find level files.");
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1122 CAL_SetupMapFile ();
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1125 // MDM begin - (GAMERS EDGE)
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1127 if (!FindFile("EGAGRAPH."EXT,NULL,2))
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1128 Quit("CA_Startup(): Can't find graphics files.");
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1132 #ifndef NOGRAPHICS
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1133 CAL_SetupGrFile ();
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1140 drawcachebox = CAL_DialogDraw;
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1141 updatecachebox = CAL_DialogUpdate;
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1142 finishcachebox = CAL_DialogFinish;*/
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1145 //==========================================================================
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1149 ======================
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1153 = Closes all files
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1155 ======================
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1158 void CA_Shutdown(global_game_variables_t *gvar)
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1161 close(gvar->handle.profilehandle);
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1163 // close(gvar->handle.showmemhandle);
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1167 close(audiohandle);*/
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1170 //===========================================================================
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1173 ======================
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1175 = CA_CacheAudioChunk
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1177 ======================
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1180 void CA_CacheAudioChunk (int chunk)
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1182 long pos,compressed;
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1183 #ifdef AUDIOHEADERLINKED
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1185 memptr bigbufferseg;
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1189 if (audiosegs[chunk])
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1191 MM_SetPurge (&(memptr)audiosegs[chunk],0);
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1192 return; // allready in memory
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1195 // MDM begin - (GAMERS EDGE)
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1197 if (!FindFile("AUDIO."EXT,NULL,2))
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1198 Quit("CA_CacheAudioChunk(): Can't find audio files.");
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1203 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
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1204 // a larger buffer
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1206 pos = audiostarts[chunk];
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1207 compressed = audiostarts[chunk+1]-pos;
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1209 lseek(audiohandle,pos,SEEK_SET);
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1211 #ifndef AUDIOHEADERLINKED
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1213 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
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1217 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
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1221 if (compressed<=BUFFERSIZE)
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1223 CA_FarRead(audiohandle,bufferseg,compressed);
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1224 source = bufferseg;
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1228 MM_GetPtr(&bigbufferseg,compressed);
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1231 MM_SetLock (&bigbufferseg,true);
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1232 CA_FarRead(audiohandle,bigbufferseg,compressed);
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1233 source = bigbufferseg;
\r
1236 expanded = *(long far *)source;
\r
1237 source += 4; // skip over length
\r
1238 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
\r
1241 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1244 if (compressed>BUFFERSIZE)
\r
1245 MM_FreePtr(&bigbufferseg);
\r
1249 //===========================================================================
\r
1252 ======================
\r
1254 = CA_LoadAllSounds
\r
1256 = Purges all sounds, then loads all new ones (mode switch)
\r
1258 ======================
\r
1261 void CA_LoadAllSounds (void)
\r
1265 switch (oldsoundmode)
\r
1270 start = STARTPCSOUNDS;
\r
1273 start = STARTADLIBSOUNDS;
\r
1277 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1278 if (audiosegs[start])
\r
1279 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
\r
1283 switch (SoundMode)
\r
1288 start = STARTPCSOUNDS;
\r
1291 start = STARTADLIBSOUNDS;
\r
1295 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1296 CA_CacheAudioChunk (start);
\r
1298 oldsoundmode = SoundMode;
\r
1301 //===========================================================================
\r
1303 //++++#if GRMODE == EGAGR
\r
1306 ======================
\r
1310 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1312 ======================
\r
1315 unsigned static sheight,swidth;
\r
1316 boolean static dothemask;
\r
1318 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1319 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1322 sheight = height; // because we are going to reassign bp
\r
1324 dothemask = domask;
\r
1326 asm mov ax,[segment]
\r
1327 asm mov ds,ax // source and dest are in same segment, and all local
\r
1329 asm mov bx,[source]
\r
1332 asm mov bp,[pixshift]
\r
1334 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1336 asm cmp [ss:dothemask],0
\r
1340 // table shift the mask
\r
1342 asm mov dx,[ss:sheight]
\r
1346 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1347 asm mov cx,ss:[swidth]
\r
1351 asm mov al,[bx] // source
\r
1353 asm inc bx // next source byte
\r
1357 asm mov ax,[bp+si] // table shift into two bytes
\r
1359 asm and [di],al // and with first byte
\r
1361 asm mov [di],ah // replace next byte
\r
1363 asm loop domaskbyte
\r
1365 asm inc di // the last shifted byte has 1s in it
\r
1372 // table shift the data
\r
1374 asm mov dx,ss:[sheight]
\r
1376 asm shl dx,1 // four planes of data
\r
1380 asm mov BYTE PTR [di],0 // 0 first byte
\r
1381 asm mov cx,ss:[swidth]
\r
1385 asm mov al,[bx] // source
\r
1386 asm inc bx // next source byte
\r
1390 asm mov ax,[bp+si] // table shift into two bytes
\r
1391 asm or [di],al // or with first byte
\r
1393 asm mov [di],ah // replace next byte
\r
1395 asm loop dodatabyte
\r
1397 asm inc di // the last shifted byte has 0s in it
\r
1405 asm mov ax,ss // restore data segment
\r
1412 //===========================================================================
\r
1415 ======================
\r
1419 = Generate shifts and set up sprite structure for a given sprite
\r
1421 ======================
\r
1424 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1427 unsigned shiftstarts[5];
\r
1428 unsigned smallplane,bigplane,expanded;
\r
1429 spritetabletype far *spr;
\r
1430 spritetype _seg *dest;
\r
1432 #if GRMODE == CGAGR
\r
1434 // CGA has no pel panning, so shifts are never needed
\r
1436 spr = &spritetable[chunk-STARTSPRITES];
\r
1437 smallplane = spr->width*spr->height;
\r
1438 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1441 dest = (spritetype _seg *)grsegs[chunk];
\r
1442 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1443 dest->planesize[0] = smallplane;
\r
1444 dest->width[0] = spr->width;
\r
1447 // expand the unshifted shape
\r
1449 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1454 #if GRMODE == EGAGR
\r
1457 // calculate sizes
\r
1459 spr = &spritetable[chunk-STARTSPRITES];
\r
1460 smallplane = spr->width*spr->height;
\r
1461 bigplane = (spr->width+1)*spr->height;
\r
1463 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1464 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1465 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1466 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1467 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1469 expanded = shiftstarts[spr->shifts];
\r
1470 MM_GetPtr (&grsegs[chunk],expanded);
\r
1473 dest = (spritetype _seg *)grsegs[chunk];
\r
1476 // expand the unshifted shape
\r
1478 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1481 // make the shifts!
\r
1483 switch (spr->shifts)
\r
1488 dest->sourceoffset[i] = shiftstarts[0];
\r
1489 dest->planesize[i] = smallplane;
\r
1490 dest->width[i] = spr->width;
\r
1497 dest->sourceoffset[i] = shiftstarts[0];
\r
1498 dest->planesize[i] = smallplane;
\r
1499 dest->width[i] = spr->width;
\r
1503 dest->sourceoffset[i] = shiftstarts[1];
\r
1504 dest->planesize[i] = bigplane;
\r
1505 dest->width[i] = spr->width+1;
\r
1507 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1508 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1512 dest->sourceoffset[0] = shiftstarts[0];
\r
1513 dest->planesize[0] = smallplane;
\r
1514 dest->width[0] = spr->width;
\r
1516 dest->sourceoffset[1] = shiftstarts[1];
\r
1517 dest->planesize[1] = bigplane;
\r
1518 dest->width[1] = spr->width+1;
\r
1519 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1520 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1522 dest->sourceoffset[2] = shiftstarts[2];
\r
1523 dest->planesize[2] = bigplane;
\r
1524 dest->width[2] = spr->width+1;
\r
1525 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1526 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1528 dest->sourceoffset[3] = shiftstarts[3];
\r
1529 dest->planesize[3] = bigplane;
\r
1530 dest->width[3] = spr->width+1;
\r
1531 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1532 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1537 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1543 //===========================================================================
\r
1547 ======================
\r
1549 = CAL_ExpandGrChunk
\r
1551 = Does whatever is needed with a pointer to a compressed chunk
\r
1553 ======================
\r
1556 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1561 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1564 // expanded sizes of tile8/16/32 are implicit
\r
1567 #if GRMODE == EGAGR
\r
1569 #define MASKBLOCK 40
\r
1572 #if GRMODE == CGAGR
\r
1574 #define MASKBLOCK 32
\r
1577 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1578 expanded = BLOCK*NUMTILE8;
\r
1579 else if (chunk<STARTTILE16)
\r
1580 expanded = MASKBLOCK*NUMTILE8M;
\r
1581 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1582 expanded = BLOCK*4;
\r
1583 else if (chunk<STARTTILE32)
\r
1584 expanded = MASKBLOCK*4;
\r
1585 else if (chunk<STARTTILE32M)
\r
1586 expanded = BLOCK*16;
\r
1588 expanded = MASKBLOCK*16;
\r
1593 // everything else has an explicit size longword
\r
1595 expanded = *(long far *)source;
\r
1596 source += 4; // skip over length
\r
1600 // allocate final space, decompress it, and free bigbuffer
\r
1601 // Sprites need to have shifts made and various other junk
\r
1603 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1604 CAL_CacheSprite(chunk,source);
\r
1607 MM_GetPtr (&grsegs[chunk],expanded);
\r
1610 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1616 ======================
\r
1620 = Gets a chunk off disk, optimizing reads to general buffer
\r
1622 ======================
\r
1625 void CAL_ReadGrChunk (int chunk)
\r
1627 long pos,compressed;
\r
1628 memptr bigbufferseg;
\r
1633 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1634 // a larger buffer
\r
1636 pos = GRFILEPOS(chunk);
\r
1637 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1641 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1644 compressed = GRFILEPOS(next)-pos;
\r
1646 lseek(grhandle,pos,SEEK_SET);
\r
1648 if (compressed<=BUFFERSIZE)
\r
1650 CA_FarRead(grhandle,bufferseg,compressed);
\r
1651 source = bufferseg;
\r
1655 MM_GetPtr(&bigbufferseg,compressed);
\r
1658 MM_SetLock (&bigbufferseg,true);
\r
1659 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1660 source = bigbufferseg;
\r
1663 CAL_ExpandGrChunk (chunk,source);
\r
1665 if (compressed>BUFFERSIZE)
\r
1666 MM_FreePtr(&bigbufferseg);
\r
1670 ======================
\r
1674 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1676 ======================
\r
1679 void CA_CacheGrChunk (int chunk)
\r
1681 long pos,compressed;
\r
1682 memptr bigbufferseg;
\r
1686 grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1687 if (grsegs[chunk])
\r
1689 MM_SetPurge (&grsegs[chunk],0);
\r
1690 return; // allready in memory
\r
1693 // MDM begin - (GAMERS EDGE)
\r
1695 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1696 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1701 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1702 // a larger buffer
\r
1704 pos = GRFILEPOS(chunk);
\r
1705 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1709 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1712 compressed = GRFILEPOS(next)-pos;
\r
1714 lseek(grhandle,pos,SEEK_SET);
\r
1716 if (compressed<=BUFFERSIZE)
\r
1718 CA_FarRead(grhandle,bufferseg,compressed);
\r
1719 source = bufferseg;
\r
1723 MM_GetPtr(&bigbufferseg,compressed);
\r
1724 MM_SetLock (&bigbufferseg,true);
\r
1725 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1726 source = bigbufferseg;
\r
1729 CAL_ExpandGrChunk (chunk,source);
\r
1731 if (compressed>BUFFERSIZE)
\r
1732 MM_FreePtr(&bigbufferseg);
\r
1737 //==========================================================================
\r
1740 ======================
\r
1744 ======================
\r
1747 void CA_CacheMap (int mapnum)
\r
1749 long pos,compressed;
\r
1751 memptr *dest,bigbufferseg;
\r
1753 unsigned far *source;
\r
1754 #ifdef MAPHEADERLINKED
\r
1755 memptr buffer2seg;
\r
1760 // MDM begin - (GAMERS EDGE)
\r
1762 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1763 Quit("CA_CacheMap(): Can't find level files.");
\r
1769 // free up memory from last map
\r
1771 if (mapon>-1 && mapheaderseg[mapon])
\r
1772 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1773 for (plane=0;plane<MAPPLANES;plane++)
\r
1774 if (mapsegs[plane])
\r
1775 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1781 // load map header
\r
1782 // The header will be cached if it is still around
\r
1784 if (!mapheaderseg[mapnum])
\r
1786 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1787 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1788 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1790 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1791 lseek(maphandle,pos,SEEK_SET);
\r
1792 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1795 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1798 // load the planes in
\r
1799 // If a plane's pointer still exists it will be overwritten (levels are
\r
1800 // allways reloaded, never cached)
\r
1803 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1805 for (plane = 0; plane<MAPPLANES; plane++)
\r
1807 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1808 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1811 continue; // the plane is not used in this game
\r
1813 dest = &(memptr)mapsegs[plane];
\r
1814 MM_GetPtr(dest,size);
\r
1816 lseek(maphandle,pos,SEEK_SET);
\r
1817 if (compressed<=BUFFERSIZE)
\r
1818 source = bufferseg;
\r
1821 MM_GetPtr(&bigbufferseg,compressed);
\r
1822 MM_SetLock (&bigbufferseg,true);
\r
1823 source = bigbufferseg;
\r
1826 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1827 #ifdef MAPHEADERLINKED
\r
1829 // unhuffman, then unRLEW
\r
1830 // The huffman'd chunk has a two byte expanded length first
\r
1831 // The resulting RLEW chunk also does, even though it's not really
\r
1834 expanded = *source;
\r
1836 MM_GetPtr (&buffer2seg,expanded);
\r
1837 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1838 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1839 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1840 MM_FreePtr (&buffer2seg);
\r
1844 // unRLEW, skipping expanded length
\r
1846 CA_RLEWexpand (source+1, *dest,size,
\r
1847 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1850 if (compressed>BUFFERSIZE)
\r
1851 MM_FreePtr(&bigbufferseg);
\r
1855 //===========================================================================
\r
1858 ======================
\r
1862 = Goes up a bit level in the needed lists and clears it out.
\r
1863 = Everything is made purgable
\r
1865 ======================
\r
1868 void CA_UpLevel (void)
\r
1870 if (ca_levelnum==7)
\r
1871 Quit ("CA_UpLevel: Up past level 7!");
\r
1877 //===========================================================================
\r
1880 ======================
\r
1884 = Goes down a bit level in the needed lists and recaches
\r
1885 = everything from the lower level
\r
1887 ======================
\r
1890 void CA_DownLevel (void)
\r
1893 Quit ("CA_DownLevel: Down past level 0!");
\r
1896 CA_CacheMarks(NULL);
\r
1899 //===========================================================================
\r
1902 ======================
\r
1906 = Clears out all the marks at the current level
\r
1908 ======================
\r
1911 void CA_ClearMarks (void)
\r
1915 for (i=0;i<NUMCHUNKS;i++)
\r
1916 grneeded[i]&=~ca_levelbit;
\r
1920 //===========================================================================
\r
1923 ======================
\r
1925 = CA_ClearAllMarks
\r
1927 = Clears out all the marks on all the levels
\r
1929 ======================
\r
1932 void CA_ClearAllMarks (void)
\r
1934 _fmemset (grneeded,0,sizeof(grneeded));
\r
1940 //===========================================================================
\r
1943 ======================
\r
1947 ======================
\r
1950 void CA_FreeGraphics (void)
\r
1954 for (i=0;i<NUMCHUNKS;i++)
\r
1956 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1961 ======================
\r
1965 = Make everything possible purgable
\r
1967 ======================
\r
1970 void CA_SetAllPurge (void)
\r
1977 // free cursor sprite and background save
\r
1982 // free map headers and map planes
\r
1984 for (i=0;i<NUMMAPS;i++)
\r
1985 if (mapheaderseg[i])
\r
1986 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
1990 MM_FreePtr (&(memptr)mapsegs[i]);
\r
1995 for (i=0;i<NUMSNDCHUNKS;i++)
\r
1997 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
2002 CA_FreeGraphics ();
\r
2006 void CA_SetGrPurge (void)
\r
2013 for (i=0;i<NUMCHUNKS;i++)
\r
2015 MM_SetPurge (&(memptr)grsegs[i],3);
\r
2019 //===========================================================================
\r
2023 ======================
\r
2027 ======================
\r
2030 #define NUMBARS (17l*8)
\r
2033 unsigned thx,thy,lastx;
\r
2034 long barx,barstep;
\r
2036 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2038 unsigned homex,homey,x;
\r
2040 barstep = (NUMBARS<<16)/numcache;
\r
2043 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2045 US_CenterWindow (20,8);
\r
2049 US_CPrint ("Loading");
\r
2050 fontcolor = F_SECONDCOLOR;
\r
2051 US_CPrint (title);
\r
2052 fontcolor = F_BLACK;
\r
2055 // draw thermometer bar
\r
2059 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2060 VWB_DrawTile8(thx,thy+8,3);
\r
2061 VWB_DrawTile8(thx,thy+16,6);
\r
2062 VWB_DrawTile8(thx+17*8,thy,2);
\r
2063 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2064 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2065 for (x=thx+8;x<thx+17*8;x+=8)
\r
2067 VWB_DrawTile8(x,thy,1);
\r
2068 VWB_DrawTile8(x,thy+8,4);
\r
2069 VWB_DrawTile8(x,thy+16,7);
\r
2072 thx += 4; // first line location
\r
2074 barx = (long)thx<<16;
\r
2077 VW_UpdateScreen();
\r
2082 ======================
\r
2084 = CAL_DialogUpdate
\r
2086 ======================
\r
2089 void CAL_DialogUpdate (void)
\r
2095 if (xh - lastx > BARSTEP)
\r
2097 for (x=lastx;x<=xh;x++)
\r
2098 #if GRMODE == EGAGR
\r
2099 VWB_Vlin (thy,thy+13,x,14);
\r
2101 #if GRMODE == CGAGR
\r
2102 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2105 VW_UpdateScreen();
\r
2110 ======================
\r
2112 = CAL_DialogFinish
\r
2114 ======================
\r
2117 void CAL_DialogFinish (void)
\r
2121 xh = thx + NUMBARS;
\r
2122 for (x=lastx;x<=xh;x++)
\r
2123 #if GRMODE == EGAGR
\r
2124 VWB_Vlin (thy,thy+13,x,14);
\r
2126 #if GRMODE == CGAGR
\r
2127 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2129 VW_UpdateScreen();
\r
2133 //===========================================================================
\r
2136 ======================
\r
2140 ======================
\r
2142 #define MAXEMPTYREAD 1024
\r
2144 void CA_CacheMarks (char *title)
\r
2147 int i,next,numcache;
\r
2148 long pos,endpos,nextpos,nextendpos,compressed;
\r
2149 long bufferstart,bufferend; // file position of general buffer
\r
2151 memptr bigbufferseg;
\r
2153 dialog = (title!=NULL);
\r
2157 // go through and make everything not needed purgable
\r
2159 for (i=0;i<NUMCHUNKS;i++)
\r
2160 if (grneeded[i]&ca_levelbit)
\r
2162 if (grsegs[i]) // its allready in memory, make
\r
2163 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2169 if (grsegs[i]) // not needed, so make it purgeable
\r
2170 MM_SetPurge(&grsegs[i],3);
\r
2173 if (!numcache) // nothing to cache!
\r
2176 // MDM begin - (GAMERS EDGE)
\r
2178 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2179 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2186 write(profilehandle,title,strlen(title));
\r
2187 write(profilehandle,"\n",1);
\r
2190 drawcachebox(title,numcache);
\r
2194 // go through and load in anything still needed
\r
2196 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2198 for (i=0;i<NUMCHUNKS;i++)
\r
2199 if ( (grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2202 // update thermometer
\r
2204 if (dialog && updatecachebox)
\r
2205 updatecachebox ();
\r
2207 pos = GRFILEPOS(i);
\r
2212 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2215 compressed = GRFILEPOS(next)-pos;
\r
2216 endpos = pos+compressed;
\r
2218 if (compressed<=BUFFERSIZE)
\r
2220 if (bufferstart<=pos
\r
2221 && bufferend>= endpos)
\r
2223 // data is allready in buffer
\r
2224 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2228 // load buffer with a new block from disk
\r
2229 // try to get as many of the needed blocks in as possible
\r
2230 while ( next < NUMCHUNKS )
\r
2232 while (next < NUMCHUNKS &&
\r
2233 !(grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2235 if (next == NUMCHUNKS)
\r
2238 nextpos = GRFILEPOS(next);
\r
2239 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2241 nextendpos = GRFILEPOS(next);
\r
2242 if (nextpos - endpos <= MAXEMPTYREAD
\r
2243 && nextendpos-pos <= BUFFERSIZE)
\r
2244 endpos = nextendpos;
\r
2246 next = NUMCHUNKS; // read pos to posend
\r
2249 lseek(grhandle,pos,SEEK_SET);
\r
2250 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2251 bufferstart = pos;
\r
2252 bufferend = endpos;
\r
2253 source = bufferseg;
\r
2258 // big chunk, allocate temporary buffer
\r
2259 MM_GetPtr(&bigbufferseg,compressed);
\r
2262 MM_SetLock (&bigbufferseg,true);
\r
2263 lseek(grhandle,pos,SEEK_SET);
\r
2264 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2265 source = bigbufferseg;
\r
2268 CAL_ExpandGrChunk (i,source);
\r
2272 if (compressed>BUFFERSIZE)
\r
2273 MM_FreePtr(&bigbufferseg);
\r
2278 // finish up any thermometer remnants
\r
2280 if (dialog && finishcachebox)
\r