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 unlink("debug.16");
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180 gvar->handle.debughandle = open("debug.16", O_CREAT | O_WRONLY | O_TEXT);
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183 void CA_CloseDebug(global_game_variables_t *gvar)
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185 close(gvar->handle.debughandle);
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191 ============================
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193 = CAL_GetGrChunkLength
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195 = Gets the length of an explicit length chunk (not tiles)
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196 = The file pointer is positioned so the compressed data can be read in next.
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198 ============================
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201 void CAL_GetGrChunkLength (int chunk)
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203 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
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204 read(grhandle,&chunkexplen,sizeof(chunkexplen));
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205 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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210 ==========================
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214 = Read from a file to a far pointer
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216 ==========================
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219 boolean CA_FarRead(int handle, byte huge *dest, dword length, mminfo_t *mm)
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224 //if(mm->EMSVer<0x40)
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225 if(length>0xfffflu)
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227 printf("File is a fat bakapee\n");
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228 segm=(length%0xfffflu)-1;
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231 // printf("CA_FarRead doesn't support 64K reads yet!\n");
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239 mov cx,[WORD PTR length]
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240 mov dx,[WORD PTR dest]
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241 mov ds,[WORD PTR dest+2]
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242 mov ah,0x3f // READ w/handle
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249 #ifdef __BORLANDC__
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253 #ifdef __BORLANDC__
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256 cmp ax,[WORD PTR length]
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258 // errno = EINVFMT; // user manager knows this is bad read
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261 #ifdef __BORLANDC__
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265 #ifdef __BORLANDC__
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269 #ifdef __BORLANDC__
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277 //}else return 0;//todo: EXPAND!!!
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282 ==========================
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286 = Write from a file to a far pointer
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288 ==========================
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291 boolean CA_FarWrite(int handle, byte huge *source, dword length, mminfo_t *mm)
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296 //if(mm->EMSVer<0x40)
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297 if(length>0xfffflu)
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299 printf("File is a fat bakapee\n");
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300 segm=(length%0xfffflu)-1;
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303 // printf("CA_FarRead doesn't support 64K reads yet!\n");
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311 mov cx,[WORD PTR length]
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312 mov dx,[WORD PTR source]
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313 mov ds,[WORD PTR source+2]
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314 mov ah,0x40 // WRITE w/handle
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321 #ifdef __BORLANDC__
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325 #ifdef __BORLANDC__
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328 cmp ax,[WORD PTR length]
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330 //errno = ENOMEM; // user manager knows this is bad write
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333 #ifdef __BORLANDC__
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337 #ifdef __BORLANDC__
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341 #ifdef __BORLANDC__
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354 ==========================
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358 = Reads a file into an allready allocated buffer
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360 ==========================
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363 boolean CA_ReadFile(char *filename, memptr *ptr, mminfo_t *mm)
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369 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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372 size = filelength(handle);
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373 if(!CA_FarRead(handle,*ptr,size, mm))
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385 ==========================
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389 = Allocate space for and load a file
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391 ==========================
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394 boolean CA_LoadFile(char *filename, memptr *ptr, mminfo_t *mm, mminfotype *mmi)
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400 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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403 size = filelength (handle);
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404 MM_GetPtr(ptr,size, mm, mmi);
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405 if(!CA_FarRead(handle,*ptr,size, mm))
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415 ============================================================================
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417 COMPRESSION routines, see JHUFF.C for more
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419 ============================================================================
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427 = CAL_OptimizeNodes
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429 = Goes through a huffman table and changes the 256-511 node numbers to the
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430 = actular address of the node. Must be called before CAL_HuffExpand
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435 void CAL_OptimizeNodes(huffnode *table)
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442 for (i=0;i<255;i++)
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444 if (node->bit0 >= 256)
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445 node->bit0 = (unsigned)(table+(node->bit0-256));
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446 if (node->bit1 >= 256)
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447 node->bit1 = (unsigned)(table+(node->bit1-256));
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455 ======================
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459 = Length is the length of the EXPANDED data
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461 ======================
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464 /*++++void CAL_HuffExpand (byte huge *source, byte huge *dest,
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465 long length,huffnode *hufftable)
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467 // unsigned bit,byte,node,code;
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468 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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470 // huffnode *nodeon;
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472 headptr = hufftable+254; // head node is allways node 254
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474 source++; // normalize
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479 sourceseg = FP_SEG(source);
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480 sourceoff = FP_OFF(source);
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481 destseg = FP_SEG(dest);
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482 destoff = FP_OFF(dest);
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483 endoff = destoff+length;
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488 // ss:bx node pointer
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491 if (length <0xfff0)
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494 //--------------------------
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495 // expand less than 64k of data
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496 //--------------------------
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508 mov ch,[si] // load first byte
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513 test ch,cl // bit set?
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515 mov dx,[ss:bx] // take bit0 path from node
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516 shl cl,1 // advance to next bit position
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521 asm mov dx,[ss:bx+2] // take bit1 path
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522 asm shl cl,1 // advance to next bit position
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523 asm jnc sourceupshort
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526 asm mov ch,[si] // load next byte
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528 asm mov cl,1 // back to first bit
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531 asm or dh,dh // if dx<256 its a byte, else move node
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532 asm jz storebyteshort
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533 asm mov bx,dx // next node = (huffnode *)code
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534 asm jmp expandshort
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538 asm inc di // write a decopmpressed byte out
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539 asm mov bx,[headptr] // back to the head node for next bit
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541 asm cmp di,ax // done?
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542 asm jne expandshort
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548 //--------------------------
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549 // expand more than 64k of data
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550 //--------------------------
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556 asm mov bx,[headptr]
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559 asm mov si,[sourceoff]
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560 asm mov di,[destoff]
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561 asm mov es,[destseg]
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562 asm mov ds,[sourceseg]
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564 asm lodsb // load first byte
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567 asm test al,cl // bit set?
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569 asm mov dx,[ss:bx] // take bit0 path from node
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572 asm mov dx,[ss:bx+2] // take bit1 path
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575 asm shl cl,1 // advance to next bit position
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578 asm cmp si,0x10 // normalize ds:si
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585 asm mov cl,1 // back to first bit
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588 asm or dh,dh // if dx<256 its a byte, else move node
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590 asm mov bx,dx // next node = (huffnode *)code
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595 asm inc di // write a decopmpressed byte out
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596 asm mov bx,[headptr] // back to the head node for next bit
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598 asm cmp di,0x10 // normalize es:di
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606 asm sub [WORD PTR ss:length],1
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608 asm dec [WORD PTR ss:length+2]
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609 asm jns expand // when length = ffff ffff, done
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623 ======================
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625 = CAL_CarmackExpand
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627 = Length is the length of the EXPANDED data
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629 ======================
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632 #define NEARTAG 0xa7
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633 #define FARTAG 0xa8
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635 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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637 unsigned ch,chhigh,count,offset;
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638 unsigned far *copyptr, far *inptr, far *outptr;
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649 if (chhigh == NEARTAG)
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653 { // have to insert a word containing the tag byte
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654 ch |= *((unsigned char far *)inptr)++;
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660 offset = *((unsigned char far *)inptr)++;
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661 copyptr = outptr - offset;
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664 *outptr++ = *copyptr++;
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667 else if (chhigh == FARTAG)
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671 { // have to insert a word containing the tag byte
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672 ch |= *((unsigned char far *)inptr)++;
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679 copyptr = dest + offset;
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682 *outptr++ = *copyptr++;
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696 ======================
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700 ======================
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703 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
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707 unsigned value,count,i;
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708 unsigned huge *start,huge *end;
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712 end = source + (length+1)/2;
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721 while (*source == value && source<end)
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726 if (count>3 || value == rlewtag)
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729 // send a tag / count / value string
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738 // send word without compressing
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740 for (i=1;i<=count;i++)
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744 } while (source<end);
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746 complength = 2*(dest-start);
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752 ======================
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755 = length is EXPANDED length
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757 ======================
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760 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
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763 // unsigned value,count,i;
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764 unsigned huge *end;
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765 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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775 if (value != rlewtag)
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783 // compressed string
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787 for (i=1;i<=count;i++)
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790 } while (dest<end);
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793 end = dest + (length)/2;
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794 sourceseg = FP_SEG(source);
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795 sourceoff = FP_OFF(source);
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796 destseg = FP_SEG(dest);
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797 destoff = FP_OFF(dest);
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798 endseg = FP_SEG(end);
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799 endoff = FP_OFF(end);
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803 // ax = source value
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805 // cx = repeat counts
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808 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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812 asm mov si,sourceoff
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815 asm mov ds,sourceseg
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826 asm mov cx,ax // repeat count
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827 asm lodsw // repeat value
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832 asm cmp si,0x10 // normalize ds:si
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844 asm cmp di,0x10 // normalize es:di
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857 asm cmp di,ss:endoff
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860 asm cmp ax,ss:endseg
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871 =============================================================================
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873 CACHE MANAGER ROUTINES
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875 =============================================================================
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879 ======================
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883 ======================
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886 /*void CAL_SetupGrFile (void)
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891 #ifdef GRHEADERLINKED
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893 #if GRMODE == EGAGR
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894 grhuffman = (huffnode *)&EGAdict;
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895 grstarts = (long _seg *)FP_SEG(&EGAhead);
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897 #if GRMODE == CGAGR
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898 grhuffman = (huffnode *)&CGAdict;
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899 grstarts = (long _seg *)FP_SEG(&CGAhead);
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902 CAL_OptimizeNodes (grhuffman);
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907 // load ???dict.ext (huffman dictionary for graphics files)
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910 if ((handle = open(GREXT"DICT."EXT,
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911 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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912 Quit ("Can't open "GREXT"DICT."EXT"!");
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914 read(handle, &grhuffman, sizeof(grhuffman));
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916 CAL_OptimizeNodes (grhuffman);
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918 // load the data offsets from ???head.ext
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920 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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922 if ((handle = open(GREXT"HEAD."EXT,
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923 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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924 Quit ("Can't open "GREXT"HEAD."EXT"!");
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926 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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934 // Open the graphics file, leaving it open until the game is finished
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936 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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937 if (grhandle == -1)
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938 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
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942 // load the pic and sprite headers into the arrays in the data segment
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945 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
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946 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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947 MM_GetPtr(&compseg,chunkcomplen);
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948 CA_FarRead (grhandle,compseg,chunkcomplen);
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949 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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950 MM_FreePtr(&compseg);
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954 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
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955 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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956 MM_GetPtr(&compseg,chunkcomplen);
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957 CA_FarRead (grhandle,compseg,chunkcomplen);
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958 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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959 MM_FreePtr(&compseg);
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963 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
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964 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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965 MM_GetPtr(&compseg,chunkcomplen);
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966 CA_FarRead (grhandle,compseg,chunkcomplen);
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967 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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968 MM_FreePtr(&compseg);
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973 //==========================================================================
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977 ======================
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981 ======================
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984 /*void CAL_SetupMapFile (void)
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990 // load maphead.ext (offsets and tileinfo for map file)
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992 #ifndef MAPHEADERLINKED
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993 if ((handle = open("MAPHEAD."EXT,
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994 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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995 Quit ("Can't open MAPHEAD."EXT"!");
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996 length = filelength(handle);
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997 MM_GetPtr (&(memptr)tinf,length);
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998 CA_FarRead(handle, tinf, length);
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1002 tinf = (byte _seg *)FP_SEG(&maphead);
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1007 // open the data file
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1009 #ifdef MAPHEADERLINKED
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1010 if ((maphandle = open("GAMEMAPS."EXT,
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1011 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1012 Quit ("Can't open GAMEMAPS."EXT"!");
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1014 if ((maphandle = open("MAPTEMP."EXT,
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1015 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1016 Quit ("Can't open MAPTEMP."EXT"!");
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1020 //==========================================================================
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1024 ======================
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1026 = CAL_SetupAudioFile
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1028 ======================
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1031 /*void CAL_SetupAudioFile (void)
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1037 // load maphead.ext (offsets and tileinfo for map file)
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1039 #ifndef AUDIOHEADERLINKED
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1040 if ((handle = open("AUDIOHED."EXT,
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1041 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1042 Quit ("Can't open AUDIOHED."EXT"!");
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1043 length = filelength(handle);
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1044 MM_GetPtr (&(memptr)audiostarts,length);
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1045 CA_FarRead(handle, (byte far *)audiostarts, length);
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1048 audiohuffman = (huffnode *)&audiodict;
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1049 CAL_OptimizeNodes (audiohuffman);
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1050 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1054 // open the data file
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1056 #ifndef AUDIOHEADERLINKED
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1057 if ((audiohandle = open("AUDIOT."EXT,
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1058 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1059 Quit ("Can't open AUDIOT."EXT"!");
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1061 if ((audiohandle = open("AUDIO."EXT,
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1062 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1063 Quit ("Can't open AUDIO."EXT"!");
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1067 //==========================================================================
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1071 ======================
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1075 = Open all files and load in headers
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1077 ======================
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1080 void CA_Startup(global_game_variables_t *gvar)
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1083 unlink("profile.16");
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1084 gvar->handle.profilehandle = open("profile.16", O_CREAT | O_WRONLY | O_TEXT);
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1086 // unlink("debug0.16");
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1087 // gvar->handle.showmemhandle = open("debug0.16", O_CREAT | O_WRONLY | O_TEXT);
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1089 // MDM begin - (GAMERS EDGE)
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1091 if(!FindFile("AUDIO."EXT,NULL,2))
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1092 Quit("CA_Startup(): Can't find audio files.");
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1097 CAL_SetupAudioFile();
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1100 // MDM begin - (GAMERS EDGE)
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1102 if (!FindFile("GAMEMAPS."EXT,NULL,1))
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1103 Quit("CA_Startup(): Can't find level files.");
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1108 CAL_SetupMapFile ();
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1111 // MDM begin - (GAMERS EDGE)
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1113 if (!FindFile("EGAGRAPH."EXT,NULL,2))
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1114 Quit("CA_Startup(): Can't find graphics files.");
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1118 #ifndef NOGRAPHICS
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1119 CAL_SetupGrFile ();
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1126 drawcachebox = CAL_DialogDraw;
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1127 updatecachebox = CAL_DialogUpdate;
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1128 finishcachebox = CAL_DialogFinish;*/
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1131 //==========================================================================
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1135 ======================
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1139 = Closes all files
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1141 ======================
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1144 void CA_Shutdown(global_game_variables_t *gvar)
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1147 close(gvar->handle.profilehandle);
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1149 // close(gvar->handle.showmemhandle);
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1153 close(audiohandle);*/
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1156 //===========================================================================
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1159 ======================
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1161 = CA_CacheAudioChunk
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1163 ======================
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1166 void CA_CacheAudioChunk (int chunk)
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1168 long pos,compressed;
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1169 #ifdef AUDIOHEADERLINKED
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1171 memptr bigbufferseg;
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1175 if (audiosegs[chunk])
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1177 MM_SetPurge (&(memptr)audiosegs[chunk],0);
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1178 return; // allready in memory
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1181 // MDM begin - (GAMERS EDGE)
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1183 if (!FindFile("AUDIO."EXT,NULL,2))
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1184 Quit("CA_CacheAudioChunk(): Can't find audio files.");
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1189 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
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1190 // a larger buffer
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1192 pos = audiostarts[chunk];
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1193 compressed = audiostarts[chunk+1]-pos;
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1195 lseek(audiohandle,pos,SEEK_SET);
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1197 #ifndef AUDIOHEADERLINKED
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1199 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
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1203 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
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1207 if (compressed<=BUFFERSIZE)
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1209 CA_FarRead(audiohandle,bufferseg,compressed);
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1210 source = bufferseg;
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1214 MM_GetPtr(&bigbufferseg,compressed);
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1217 MM_SetLock (&bigbufferseg,true);
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1218 CA_FarRead(audiohandle,bigbufferseg,compressed);
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1219 source = bigbufferseg;
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1222 expanded = *(long far *)source;
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1223 source += 4; // skip over length
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1224 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
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1227 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
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1230 if (compressed>BUFFERSIZE)
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1231 MM_FreePtr(&bigbufferseg);
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1235 //===========================================================================
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1238 ======================
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1240 = CA_LoadAllSounds
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1242 = Purges all sounds, then loads all new ones (mode switch)
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1244 ======================
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1247 void CA_LoadAllSounds (void)
\r
1251 switch (oldsoundmode)
\r
1256 start = STARTPCSOUNDS;
\r
1259 start = STARTADLIBSOUNDS;
\r
1263 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1264 if (audiosegs[start])
\r
1265 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
\r
1269 switch (SoundMode)
\r
1274 start = STARTPCSOUNDS;
\r
1277 start = STARTADLIBSOUNDS;
\r
1281 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1282 CA_CacheAudioChunk (start);
\r
1284 oldsoundmode = SoundMode;
\r
1287 //===========================================================================
\r
1289 //++++#if GRMODE == EGAGR
\r
1292 ======================
\r
1296 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1298 ======================
\r
1301 unsigned static sheight,swidth;
\r
1302 boolean static dothemask;
\r
1304 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1305 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1308 sheight = height; // because we are going to reassign bp
\r
1310 dothemask = domask;
\r
1312 asm mov ax,[segment]
\r
1313 asm mov ds,ax // source and dest are in same segment, and all local
\r
1315 asm mov bx,[source]
\r
1318 asm mov bp,[pixshift]
\r
1320 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1322 asm cmp [ss:dothemask],0
\r
1326 // table shift the mask
\r
1328 asm mov dx,[ss:sheight]
\r
1332 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1333 asm mov cx,ss:[swidth]
\r
1337 asm mov al,[bx] // source
\r
1339 asm inc bx // next source byte
\r
1343 asm mov ax,[bp+si] // table shift into two bytes
\r
1345 asm and [di],al // and with first byte
\r
1347 asm mov [di],ah // replace next byte
\r
1349 asm loop domaskbyte
\r
1351 asm inc di // the last shifted byte has 1s in it
\r
1358 // table shift the data
\r
1360 asm mov dx,ss:[sheight]
\r
1362 asm shl dx,1 // four planes of data
\r
1366 asm mov BYTE PTR [di],0 // 0 first byte
\r
1367 asm mov cx,ss:[swidth]
\r
1371 asm mov al,[bx] // source
\r
1372 asm inc bx // next source byte
\r
1376 asm mov ax,[bp+si] // table shift into two bytes
\r
1377 asm or [di],al // or with first byte
\r
1379 asm mov [di],ah // replace next byte
\r
1381 asm loop dodatabyte
\r
1383 asm inc di // the last shifted byte has 0s in it
\r
1391 asm mov ax,ss // restore data segment
\r
1398 //===========================================================================
\r
1401 ======================
\r
1405 = Generate shifts and set up sprite structure for a given sprite
\r
1407 ======================
\r
1410 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1413 unsigned shiftstarts[5];
\r
1414 unsigned smallplane,bigplane,expanded;
\r
1415 spritetabletype far *spr;
\r
1416 spritetype _seg *dest;
\r
1418 #if GRMODE == CGAGR
\r
1420 // CGA has no pel panning, so shifts are never needed
\r
1422 spr = &spritetable[chunk-STARTSPRITES];
\r
1423 smallplane = spr->width*spr->height;
\r
1424 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1427 dest = (spritetype _seg *)grsegs[chunk];
\r
1428 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1429 dest->planesize[0] = smallplane;
\r
1430 dest->width[0] = spr->width;
\r
1433 // expand the unshifted shape
\r
1435 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1440 #if GRMODE == EGAGR
\r
1443 // calculate sizes
\r
1445 spr = &spritetable[chunk-STARTSPRITES];
\r
1446 smallplane = spr->width*spr->height;
\r
1447 bigplane = (spr->width+1)*spr->height;
\r
1449 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1450 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1451 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1452 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1453 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1455 expanded = shiftstarts[spr->shifts];
\r
1456 MM_GetPtr (&grsegs[chunk],expanded);
\r
1459 dest = (spritetype _seg *)grsegs[chunk];
\r
1462 // expand the unshifted shape
\r
1464 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1467 // make the shifts!
\r
1469 switch (spr->shifts)
\r
1474 dest->sourceoffset[i] = shiftstarts[0];
\r
1475 dest->planesize[i] = smallplane;
\r
1476 dest->width[i] = spr->width;
\r
1483 dest->sourceoffset[i] = shiftstarts[0];
\r
1484 dest->planesize[i] = smallplane;
\r
1485 dest->width[i] = spr->width;
\r
1489 dest->sourceoffset[i] = shiftstarts[1];
\r
1490 dest->planesize[i] = bigplane;
\r
1491 dest->width[i] = spr->width+1;
\r
1493 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1494 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1498 dest->sourceoffset[0] = shiftstarts[0];
\r
1499 dest->planesize[0] = smallplane;
\r
1500 dest->width[0] = spr->width;
\r
1502 dest->sourceoffset[1] = shiftstarts[1];
\r
1503 dest->planesize[1] = bigplane;
\r
1504 dest->width[1] = spr->width+1;
\r
1505 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1506 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1508 dest->sourceoffset[2] = shiftstarts[2];
\r
1509 dest->planesize[2] = bigplane;
\r
1510 dest->width[2] = spr->width+1;
\r
1511 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1512 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1514 dest->sourceoffset[3] = shiftstarts[3];
\r
1515 dest->planesize[3] = bigplane;
\r
1516 dest->width[3] = spr->width+1;
\r
1517 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1518 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1523 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1529 //===========================================================================
\r
1533 ======================
\r
1535 = CAL_ExpandGrChunk
\r
1537 = Does whatever is needed with a pointer to a compressed chunk
\r
1539 ======================
\r
1542 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1547 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1550 // expanded sizes of tile8/16/32 are implicit
\r
1553 #if GRMODE == EGAGR
\r
1555 #define MASKBLOCK 40
\r
1558 #if GRMODE == CGAGR
\r
1560 #define MASKBLOCK 32
\r
1563 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1564 expanded = BLOCK*NUMTILE8;
\r
1565 else if (chunk<STARTTILE16)
\r
1566 expanded = MASKBLOCK*NUMTILE8M;
\r
1567 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1568 expanded = BLOCK*4;
\r
1569 else if (chunk<STARTTILE32)
\r
1570 expanded = MASKBLOCK*4;
\r
1571 else if (chunk<STARTTILE32M)
\r
1572 expanded = BLOCK*16;
\r
1574 expanded = MASKBLOCK*16;
\r
1579 // everything else has an explicit size longword
\r
1581 expanded = *(long far *)source;
\r
1582 source += 4; // skip over length
\r
1586 // allocate final space, decompress it, and free bigbuffer
\r
1587 // Sprites need to have shifts made and various other junk
\r
1589 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1590 CAL_CacheSprite(chunk,source);
\r
1593 MM_GetPtr (&grsegs[chunk],expanded);
\r
1596 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1602 ======================
\r
1606 = Gets a chunk off disk, optimizing reads to general buffer
\r
1608 ======================
\r
1611 void CAL_ReadGrChunk (int chunk)
\r
1613 long pos,compressed;
\r
1614 memptr bigbufferseg;
\r
1619 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1620 // a larger buffer
\r
1622 pos = GRFILEPOS(chunk);
\r
1623 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1627 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1630 compressed = GRFILEPOS(next)-pos;
\r
1632 lseek(grhandle,pos,SEEK_SET);
\r
1634 if (compressed<=BUFFERSIZE)
\r
1636 CA_FarRead(grhandle,bufferseg,compressed);
\r
1637 source = bufferseg;
\r
1641 MM_GetPtr(&bigbufferseg,compressed);
\r
1644 MM_SetLock (&bigbufferseg,true);
\r
1645 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1646 source = bigbufferseg;
\r
1649 CAL_ExpandGrChunk (chunk,source);
\r
1651 if (compressed>BUFFERSIZE)
\r
1652 MM_FreePtr(&bigbufferseg);
\r
1656 ======================
\r
1660 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1662 ======================
\r
1665 void CA_CacheGrChunk (int chunk)
\r
1667 long pos,compressed;
\r
1668 memptr bigbufferseg;
\r
1672 grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1673 if (grsegs[chunk])
\r
1675 MM_SetPurge (&grsegs[chunk],0);
\r
1676 return; // allready in memory
\r
1679 // MDM begin - (GAMERS EDGE)
\r
1681 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1682 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1687 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1688 // a larger buffer
\r
1690 pos = GRFILEPOS(chunk);
\r
1691 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1695 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1698 compressed = GRFILEPOS(next)-pos;
\r
1700 lseek(grhandle,pos,SEEK_SET);
\r
1702 if (compressed<=BUFFERSIZE)
\r
1704 CA_FarRead(grhandle,bufferseg,compressed);
\r
1705 source = bufferseg;
\r
1709 MM_GetPtr(&bigbufferseg,compressed);
\r
1710 MM_SetLock (&bigbufferseg,true);
\r
1711 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1712 source = bigbufferseg;
\r
1715 CAL_ExpandGrChunk (chunk,source);
\r
1717 if (compressed>BUFFERSIZE)
\r
1718 MM_FreePtr(&bigbufferseg);
\r
1723 //==========================================================================
\r
1726 ======================
\r
1730 ======================
\r
1733 void CA_CacheMap (int mapnum)
\r
1735 long pos,compressed;
\r
1737 memptr *dest,bigbufferseg;
\r
1739 unsigned far *source;
\r
1740 #ifdef MAPHEADERLINKED
\r
1741 memptr buffer2seg;
\r
1746 // MDM begin - (GAMERS EDGE)
\r
1748 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1749 Quit("CA_CacheMap(): Can't find level files.");
\r
1755 // free up memory from last map
\r
1757 if (mapon>-1 && mapheaderseg[mapon])
\r
1758 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1759 for (plane=0;plane<MAPPLANES;plane++)
\r
1760 if (mapsegs[plane])
\r
1761 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1767 // load map header
\r
1768 // The header will be cached if it is still around
\r
1770 if (!mapheaderseg[mapnum])
\r
1772 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1773 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1774 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1776 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1777 lseek(maphandle,pos,SEEK_SET);
\r
1778 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1781 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1784 // load the planes in
\r
1785 // If a plane's pointer still exists it will be overwritten (levels are
\r
1786 // allways reloaded, never cached)
\r
1789 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1791 for (plane = 0; plane<MAPPLANES; plane++)
\r
1793 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1794 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1797 continue; // the plane is not used in this game
\r
1799 dest = &(memptr)mapsegs[plane];
\r
1800 MM_GetPtr(dest,size);
\r
1802 lseek(maphandle,pos,SEEK_SET);
\r
1803 if (compressed<=BUFFERSIZE)
\r
1804 source = bufferseg;
\r
1807 MM_GetPtr(&bigbufferseg,compressed);
\r
1808 MM_SetLock (&bigbufferseg,true);
\r
1809 source = bigbufferseg;
\r
1812 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1813 #ifdef MAPHEADERLINKED
\r
1815 // unhuffman, then unRLEW
\r
1816 // The huffman'd chunk has a two byte expanded length first
\r
1817 // The resulting RLEW chunk also does, even though it's not really
\r
1820 expanded = *source;
\r
1822 MM_GetPtr (&buffer2seg,expanded);
\r
1823 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1824 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1825 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1826 MM_FreePtr (&buffer2seg);
\r
1830 // unRLEW, skipping expanded length
\r
1832 CA_RLEWexpand (source+1, *dest,size,
\r
1833 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1836 if (compressed>BUFFERSIZE)
\r
1837 MM_FreePtr(&bigbufferseg);
\r
1841 //===========================================================================
\r
1844 ======================
\r
1848 = Goes up a bit level in the needed lists and clears it out.
\r
1849 = Everything is made purgable
\r
1851 ======================
\r
1854 void CA_UpLevel (void)
\r
1856 if (ca_levelnum==7)
\r
1857 Quit ("CA_UpLevel: Up past level 7!");
\r
1863 //===========================================================================
\r
1866 ======================
\r
1870 = Goes down a bit level in the needed lists and recaches
\r
1871 = everything from the lower level
\r
1873 ======================
\r
1876 void CA_DownLevel (void)
\r
1879 Quit ("CA_DownLevel: Down past level 0!");
\r
1882 CA_CacheMarks(NULL);
\r
1885 //===========================================================================
\r
1888 ======================
\r
1892 = Clears out all the marks at the current level
\r
1894 ======================
\r
1897 void CA_ClearMarks (void)
\r
1901 for (i=0;i<NUMCHUNKS;i++)
\r
1902 grneeded[i]&=~ca_levelbit;
\r
1906 //===========================================================================
\r
1909 ======================
\r
1911 = CA_ClearAllMarks
\r
1913 = Clears out all the marks on all the levels
\r
1915 ======================
\r
1918 void CA_ClearAllMarks (void)
\r
1920 _fmemset (grneeded,0,sizeof(grneeded));
\r
1926 //===========================================================================
\r
1929 ======================
\r
1933 ======================
\r
1936 void CA_FreeGraphics (void)
\r
1940 for (i=0;i<NUMCHUNKS;i++)
\r
1942 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1947 ======================
\r
1951 = Make everything possible purgable
\r
1953 ======================
\r
1956 void CA_SetAllPurge (void)
\r
1963 // free cursor sprite and background save
\r
1968 // free map headers and map planes
\r
1970 for (i=0;i<NUMMAPS;i++)
\r
1971 if (mapheaderseg[i])
\r
1972 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
1976 MM_FreePtr (&(memptr)mapsegs[i]);
\r
1981 for (i=0;i<NUMSNDCHUNKS;i++)
\r
1983 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
1988 CA_FreeGraphics ();
\r
1992 void CA_SetGrPurge (void)
\r
1999 for (i=0;i<NUMCHUNKS;i++)
\r
2001 MM_SetPurge (&(memptr)grsegs[i],3);
\r
2005 //===========================================================================
\r
2009 ======================
\r
2013 ======================
\r
2016 #define NUMBARS (17l*8)
\r
2019 unsigned thx,thy,lastx;
\r
2020 long barx,barstep;
\r
2022 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2024 unsigned homex,homey,x;
\r
2026 barstep = (NUMBARS<<16)/numcache;
\r
2029 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2031 US_CenterWindow (20,8);
\r
2035 US_CPrint ("Loading");
\r
2036 fontcolor = F_SECONDCOLOR;
\r
2037 US_CPrint (title);
\r
2038 fontcolor = F_BLACK;
\r
2041 // draw thermometer bar
\r
2045 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2046 VWB_DrawTile8(thx,thy+8,3);
\r
2047 VWB_DrawTile8(thx,thy+16,6);
\r
2048 VWB_DrawTile8(thx+17*8,thy,2);
\r
2049 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2050 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2051 for (x=thx+8;x<thx+17*8;x+=8)
\r
2053 VWB_DrawTile8(x,thy,1);
\r
2054 VWB_DrawTile8(x,thy+8,4);
\r
2055 VWB_DrawTile8(x,thy+16,7);
\r
2058 thx += 4; // first line location
\r
2060 barx = (long)thx<<16;
\r
2063 VW_UpdateScreen();
\r
2068 ======================
\r
2070 = CAL_DialogUpdate
\r
2072 ======================
\r
2075 void CAL_DialogUpdate (void)
\r
2081 if (xh - lastx > BARSTEP)
\r
2083 for (x=lastx;x<=xh;x++)
\r
2084 #if GRMODE == EGAGR
\r
2085 VWB_Vlin (thy,thy+13,x,14);
\r
2087 #if GRMODE == CGAGR
\r
2088 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2091 VW_UpdateScreen();
\r
2096 ======================
\r
2098 = CAL_DialogFinish
\r
2100 ======================
\r
2103 void CAL_DialogFinish (void)
\r
2107 xh = thx + NUMBARS;
\r
2108 for (x=lastx;x<=xh;x++)
\r
2109 #if GRMODE == EGAGR
\r
2110 VWB_Vlin (thy,thy+13,x,14);
\r
2112 #if GRMODE == CGAGR
\r
2113 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2115 VW_UpdateScreen();
\r
2119 //===========================================================================
\r
2122 ======================
\r
2126 ======================
\r
2128 #define MAXEMPTYREAD 1024
\r
2130 void CA_CacheMarks (char *title)
\r
2133 int i,next,numcache;
\r
2134 long pos,endpos,nextpos,nextendpos,compressed;
\r
2135 long bufferstart,bufferend; // file position of general buffer
\r
2137 memptr bigbufferseg;
\r
2139 dialog = (title!=NULL);
\r
2143 // go through and make everything not needed purgable
\r
2145 for (i=0;i<NUMCHUNKS;i++)
\r
2146 if (grneeded[i]&ca_levelbit)
\r
2148 if (grsegs[i]) // its allready in memory, make
\r
2149 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2155 if (grsegs[i]) // not needed, so make it purgeable
\r
2156 MM_SetPurge(&grsegs[i],3);
\r
2159 if (!numcache) // nothing to cache!
\r
2162 // MDM begin - (GAMERS EDGE)
\r
2164 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2165 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2172 write(profilehandle,title,strlen(title));
\r
2173 write(profilehandle,"\n",1);
\r
2176 drawcachebox(title,numcache);
\r
2180 // go through and load in anything still needed
\r
2182 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2184 for (i=0;i<NUMCHUNKS;i++)
\r
2185 if ( (grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2188 // update thermometer
\r
2190 if (dialog && updatecachebox)
\r
2191 updatecachebox ();
\r
2193 pos = GRFILEPOS(i);
\r
2198 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2201 compressed = GRFILEPOS(next)-pos;
\r
2202 endpos = pos+compressed;
\r
2204 if (compressed<=BUFFERSIZE)
\r
2206 if (bufferstart<=pos
\r
2207 && bufferend>= endpos)
\r
2209 // data is allready in buffer
\r
2210 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2214 // load buffer with a new block from disk
\r
2215 // try to get as many of the needed blocks in as possible
\r
2216 while ( next < NUMCHUNKS )
\r
2218 while (next < NUMCHUNKS &&
\r
2219 !(grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2221 if (next == NUMCHUNKS)
\r
2224 nextpos = GRFILEPOS(next);
\r
2225 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2227 nextendpos = GRFILEPOS(next);
\r
2228 if (nextpos - endpos <= MAXEMPTYREAD
\r
2229 && nextendpos-pos <= BUFFERSIZE)
\r
2230 endpos = nextendpos;
\r
2232 next = NUMCHUNKS; // read pos to posend
\r
2235 lseek(grhandle,pos,SEEK_SET);
\r
2236 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2237 bufferstart = pos;
\r
2238 bufferend = endpos;
\r
2239 source = bufferseg;
\r
2244 // big chunk, allocate temporary buffer
\r
2245 MM_GetPtr(&bigbufferseg,compressed);
\r
2248 MM_SetLock (&bigbufferseg,true);
\r
2249 lseek(grhandle,pos,SEEK_SET);
\r
2250 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2251 source = bigbufferseg;
\r
2254 CAL_ExpandGrChunk (i,source);
\r
2258 if (compressed>BUFFERSIZE)
\r
2259 MM_FreePtr(&bigbufferseg);
\r
2264 // finish up any thermometer remnants
\r
2266 if (dialog && finishcachebox)
\r