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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34 //#include "ID_STRS.H"
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36 //#define THREEBYTEGRSTARTS
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39 =============================================================================
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43 =============================================================================
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48 unsigned bit0,bit1; // 0-255 is a character, > is a pointer to a node
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55 long headeroffsets[100];
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61 =============================================================================
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65 =============================================================================
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71 unsigned _seg *mapsegs[3];
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72 maptype _seg *mapheaderseg[NUMMAPS];
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73 byte _seg *audiosegs[NUMSNDCHUNKS];
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74 void _seg *grsegs[NUMCHUNKS];
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76 byte far grneeded[NUMCHUNKS];
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77 byte ca_levelbit,ca_levelnum;*/
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79 int profilehandle,debughandle;
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81 void (*drawcachebox) (char *title, unsigned numcache);
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82 void (*updatecachebox) (void);
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83 void (*finishcachebox) (void);
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86 =============================================================================
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90 =============================================================================
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93 /*extern long far CGAhead;
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94 extern long far EGAhead;
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95 extern byte CGAdict;
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96 extern byte EGAdict;
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97 extern byte far maphead;
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98 extern byte mapdict;
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99 extern byte far audiohead;
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100 extern byte audiodict;
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103 long _seg *grstarts; // array of offsets in egagraph, -1 for sparse
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104 long _seg *audiostarts; // array of offsets in audio / audiot
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106 #ifdef GRHEADERLINKED
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107 huffnode *grhuffman;
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109 huffnode grhuffman[255];
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112 #ifdef AUDIOHEADERLINKED
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113 huffnode *audiohuffman;
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115 huffnode audiohuffman[255];
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119 int grhandle; // handle to EGAGRAPH
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120 int maphandle; // handle to MAPTEMP / GAMEMAPS
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121 int audiohandle; // handle to AUDIOT / AUDIO
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123 long chunkcomplen,chunkexplen;
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125 SDMode oldsoundmode;
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129 void CAL_DialogDraw (char *title,unsigned numcache);
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130 void CAL_DialogUpdate (void);
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131 void CAL_DialogFinish (void);*/
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132 //void CAL_CarmackExpand (unsigned far *source, unsigned far *dest,unsigned length);
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135 /*++++#ifdef THREEBYTEGRSTARTS
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136 #define FILEPOSSIZE 3
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137 //#define GRFILEPOS(c) (*(long far *)(((byte far *)grstarts)+(c)*3)&0xffffff)
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138 long GRFILEPOS(int c)
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145 value = *(long far *)(((byte far *)grstarts)+offset);
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147 value &= 0x00ffffffl;
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149 if (value == 0xffffffl)
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155 #define FILEPOSSIZE 4
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156 #define GRFILEPOS(c) (grstarts[c])
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160 =============================================================================
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164 =============================================================================
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168 ============================
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170 = CA_OpenDebug / CA_CloseDebug
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172 = Opens a binary file with the handle "debughandle"
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174 ============================
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176 void CA_OpenDebug(void)
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178 unlink("debug.16");
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179 debughandle = open("debug.16", O_CREAT | O_WRONLY | O_TEXT);
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182 void CA_CloseDebug(void)
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184 close(debughandle);
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190 ============================
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192 = CAL_GetGrChunkLength
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194 = Gets the length of an explicit length chunk (not tiles)
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195 = The file pointer is positioned so the compressed data can be read in next.
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197 ============================
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200 void CAL_GetGrChunkLength (int chunk)
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202 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
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203 read(grhandle,&chunkexplen,sizeof(chunkexplen));
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204 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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209 ==========================
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213 = Read from a file to a far pointer
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215 ==========================
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218 boolean CA_FarRead(int handle, byte huge *dest, dword length, mminfo_t *mm)
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223 //if(mm->EMSVer<0x40)
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226 printf("File is a fat bakapee\n");
227 segm=(length%0xfffflu)-1;
230 // 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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250 cmp ax,[WORD PTR length]
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252 // errno = EINVFMT; // user manager knows this is bad read
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260 //}else return 0;//todo: EXPAND!!!
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265 ==========================
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269 = Write from a file to a far pointer
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271 ==========================
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274 boolean CA_FarWrite(int handle, byte huge *source, dword length, mminfo_t *mm)
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279 //if(mm->EMSVer<0x40)
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282 printf("File is a fat bakapee\n");
283 segm=(length%0xfffflu)-1;
286 // printf("CA_FarRead doesn't support 64K reads yet!\n");
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295 mov cx,[WORD PTR length]
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296 mov dx,[WORD PTR source]
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297 mov ds,[WORD PTR source+2]
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298 mov ah,0x40 // WRITE w/handle
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306 cmp ax,[WORD PTR length]
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308 //errno = ENOMEM; // user manager knows this is bad write
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321 ==========================
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325 = Reads a file into an allready allocated buffer
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327 ==========================
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330 boolean CA_ReadFile(char *filename, memptr *ptr, mminfo_t *mm)
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336 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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339 size = filelength(handle);
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340 if(!CA_FarRead(handle,*ptr,size, mm))
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352 ==========================
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356 = Allocate space for and load a file
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358 ==========================
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361 boolean CA_LoadFile(char *filename, memptr *ptr, mminfo_t *mm, mminfotype *mmi)
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367 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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370 size = filelength (handle);
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371 MM_GetPtr(ptr,size, mm, mmi);
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372 if(!CA_FarRead(handle,*ptr,size, mm))
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382 ============================================================================
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384 COMPRESSION routines, see JHUFF.C for more
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386 ============================================================================
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394 = CAL_OptimizeNodes
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396 = Goes through a huffman table and changes the 256-511 node numbers to the
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397 = actular address of the node. Must be called before CAL_HuffExpand
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402 void CAL_OptimizeNodes(huffnode *table)
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409 for (i=0;i<255;i++)
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411 if (node->bit0 >= 256)
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412 node->bit0 = (unsigned)(table+(node->bit0-256));
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413 if (node->bit1 >= 256)
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414 node->bit1 = (unsigned)(table+(node->bit1-256));
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422 ======================
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426 = Length is the length of the EXPANDED data
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428 ======================
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431 /*++++void CAL_HuffExpand (byte huge *source, byte huge *dest,
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432 long length,huffnode *hufftable)
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434 // unsigned bit,byte,node,code;
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435 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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437 // huffnode *nodeon;
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439 headptr = hufftable+254; // head node is allways node 254
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441 source++; // normalize
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446 sourceseg = FP_SEG(source);
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447 sourceoff = FP_OFF(source);
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448 destseg = FP_SEG(dest);
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449 destoff = FP_OFF(dest);
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450 endoff = destoff+length;
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455 // ss:bx node pointer
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458 if (length <0xfff0)
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461 //--------------------------
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462 // expand less than 64k of data
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463 //--------------------------
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475 mov ch,[si] // load first byte
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480 test ch,cl // bit set?
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482 mov dx,[ss:bx] // take bit0 path from node
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483 shl cl,1 // advance to next bit position
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488 asm mov dx,[ss:bx+2] // take bit1 path
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489 asm shl cl,1 // advance to next bit position
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490 asm jnc sourceupshort
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493 asm mov ch,[si] // load next byte
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495 asm mov cl,1 // back to first bit
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498 asm or dh,dh // if dx<256 its a byte, else move node
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499 asm jz storebyteshort
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500 asm mov bx,dx // next node = (huffnode *)code
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501 asm jmp expandshort
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505 asm inc di // write a decopmpressed byte out
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506 asm mov bx,[headptr] // back to the head node for next bit
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508 asm cmp di,ax // done?
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509 asm jne expandshort
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515 //--------------------------
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516 // expand more than 64k of data
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517 //--------------------------
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523 asm mov bx,[headptr]
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526 asm mov si,[sourceoff]
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527 asm mov di,[destoff]
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528 asm mov es,[destseg]
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529 asm mov ds,[sourceseg]
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531 asm lodsb // load first byte
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534 asm test al,cl // bit set?
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536 asm mov dx,[ss:bx] // take bit0 path from node
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539 asm mov dx,[ss:bx+2] // take bit1 path
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542 asm shl cl,1 // advance to next bit position
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545 asm cmp si,0x10 // normalize ds:si
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552 asm mov cl,1 // back to first bit
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555 asm or dh,dh // if dx<256 its a byte, else move node
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557 asm mov bx,dx // next node = (huffnode *)code
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562 asm inc di // write a decopmpressed byte out
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563 asm mov bx,[headptr] // back to the head node for next bit
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565 asm cmp di,0x10 // normalize es:di
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573 asm sub [WORD PTR ss:length],1
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575 asm dec [WORD PTR ss:length+2]
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576 asm jns expand // when length = ffff ffff, done
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590 ======================
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592 = CAL_CarmackExpand
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594 = Length is the length of the EXPANDED data
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596 ======================
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599 #define NEARTAG 0xa7
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600 #define FARTAG 0xa8
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602 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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604 unsigned ch,chhigh,count,offset;
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605 unsigned far *copyptr, far *inptr, far *outptr;
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616 if (chhigh == NEARTAG)
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620 { // have to insert a word containing the tag byte
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621 ch |= *((unsigned char far *)inptr)++;
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627 offset = *((unsigned char far *)inptr)++;
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628 copyptr = outptr - offset;
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631 *outptr++ = *copyptr++;
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634 else if (chhigh == FARTAG)
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638 { // have to insert a word containing the tag byte
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639 ch |= *((unsigned char far *)inptr)++;
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646 copyptr = dest + offset;
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649 *outptr++ = *copyptr++;
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663 ======================
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667 ======================
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670 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
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674 unsigned value,count,i;
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675 unsigned huge *start,huge *end;
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679 end = source + (length+1)/2;
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688 while (*source == value && source<end)
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693 if (count>3 || value == rlewtag)
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696 // send a tag / count / value string
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705 // send word without compressing
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707 for (i=1;i<=count;i++)
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711 } while (source<end);
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713 complength = 2*(dest-start);
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719 ======================
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722 = length is EXPANDED length
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724 ======================
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727 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
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730 // unsigned value,count,i;
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731 unsigned huge *end;
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732 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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742 if (value != rlewtag)
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750 // compressed string
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754 for (i=1;i<=count;i++)
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757 } while (dest<end);
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760 end = dest + (length)/2;
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761 sourceseg = FP_SEG(source);
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762 sourceoff = FP_OFF(source);
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763 destseg = FP_SEG(dest);
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764 destoff = FP_OFF(dest);
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765 endseg = FP_SEG(end);
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766 endoff = FP_OFF(end);
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770 // ax = source value
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772 // cx = repeat counts
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775 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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779 asm mov si,sourceoff
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782 asm mov ds,sourceseg
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793 asm mov cx,ax // repeat count
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794 asm lodsw // repeat value
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799 asm cmp si,0x10 // normalize ds:si
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811 asm cmp di,0x10 // normalize es:di
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824 asm cmp di,ss:endoff
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827 asm cmp ax,ss:endseg
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838 =============================================================================
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840 CACHE MANAGER ROUTINES
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842 =============================================================================
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846 ======================
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850 ======================
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853 /*void CAL_SetupGrFile (void)
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858 #ifdef GRHEADERLINKED
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860 #if GRMODE == EGAGR
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861 grhuffman = (huffnode *)&EGAdict;
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862 grstarts = (long _seg *)FP_SEG(&EGAhead);
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864 #if GRMODE == CGAGR
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865 grhuffman = (huffnode *)&CGAdict;
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866 grstarts = (long _seg *)FP_SEG(&CGAhead);
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869 CAL_OptimizeNodes (grhuffman);
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874 // load ???dict.ext (huffman dictionary for graphics files)
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877 if ((handle = open(GREXT"DICT."EXT,
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878 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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879 Quit ("Can't open "GREXT"DICT."EXT"!");
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881 read(handle, &grhuffman, sizeof(grhuffman));
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883 CAL_OptimizeNodes (grhuffman);
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885 // load the data offsets from ???head.ext
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887 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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889 if ((handle = open(GREXT"HEAD."EXT,
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890 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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891 Quit ("Can't open "GREXT"HEAD."EXT"!");
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893 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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901 // Open the graphics file, leaving it open until the game is finished
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903 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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904 if (grhandle == -1)
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905 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
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909 // load the pic and sprite headers into the arrays in the data segment
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912 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
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913 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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914 MM_GetPtr(&compseg,chunkcomplen);
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915 CA_FarRead (grhandle,compseg,chunkcomplen);
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916 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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917 MM_FreePtr(&compseg);
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921 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
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922 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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923 MM_GetPtr(&compseg,chunkcomplen);
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924 CA_FarRead (grhandle,compseg,chunkcomplen);
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925 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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926 MM_FreePtr(&compseg);
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930 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
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931 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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932 MM_GetPtr(&compseg,chunkcomplen);
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933 CA_FarRead (grhandle,compseg,chunkcomplen);
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934 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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935 MM_FreePtr(&compseg);
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940 //==========================================================================
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944 ======================
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948 ======================
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951 /*void CAL_SetupMapFile (void)
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957 // load maphead.ext (offsets and tileinfo for map file)
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959 #ifndef MAPHEADERLINKED
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960 if ((handle = open("MAPHEAD."EXT,
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961 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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962 Quit ("Can't open MAPHEAD."EXT"!");
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963 length = filelength(handle);
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964 MM_GetPtr (&(memptr)tinf,length);
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965 CA_FarRead(handle, tinf, length);
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969 tinf = (byte _seg *)FP_SEG(&maphead);
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974 // open the data file
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976 #ifdef MAPHEADERLINKED
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977 if ((maphandle = open("GAMEMAPS."EXT,
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978 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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979 Quit ("Can't open GAMEMAPS."EXT"!");
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981 if ((maphandle = open("MAPTEMP."EXT,
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982 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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983 Quit ("Can't open MAPTEMP."EXT"!");
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987 //==========================================================================
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991 ======================
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993 = CAL_SetupAudioFile
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995 ======================
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998 /*void CAL_SetupAudioFile (void)
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1004 // load maphead.ext (offsets and tileinfo for map file)
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1006 #ifndef AUDIOHEADERLINKED
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1007 if ((handle = open("AUDIOHED."EXT,
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1008 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1009 Quit ("Can't open AUDIOHED."EXT"!");
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1010 length = filelength(handle);
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1011 MM_GetPtr (&(memptr)audiostarts,length);
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1012 CA_FarRead(handle, (byte far *)audiostarts, length);
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1015 audiohuffman = (huffnode *)&audiodict;
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1016 CAL_OptimizeNodes (audiohuffman);
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1017 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1021 // open the data file
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1023 #ifndef AUDIOHEADERLINKED
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1024 if ((audiohandle = open("AUDIOT."EXT,
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1025 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1026 Quit ("Can't open AUDIOT."EXT"!");
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1028 if ((audiohandle = open("AUDIO."EXT,
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1029 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1030 Quit ("Can't open AUDIO."EXT"!");
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1034 //==========================================================================
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1038 ======================
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1042 = Open all files and load in headers
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1044 ======================
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1047 void CA_Startup(void)
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1050 unlink("profile.16");
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1051 profilehandle = open("profile.16", O_CREAT | O_WRONLY | O_TEXT);
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1054 // MDM begin - (GAMERS EDGE)
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1056 if(!FindFile("AUDIO."EXT,NULL,2))
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1057 Quit("CA_Startup(): Can't find audio files.");
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1062 CAL_SetupAudioFile();
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1065 // MDM begin - (GAMERS EDGE)
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1067 if (!FindFile("GAMEMAPS."EXT,NULL,1))
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1068 Quit("CA_Startup(): Can't find level files.");
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1073 CAL_SetupMapFile ();
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1076 // MDM begin - (GAMERS EDGE)
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1078 if (!FindFile("EGAGRAPH."EXT,NULL,2))
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1079 Quit("CA_Startup(): Can't find graphics files.");
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1083 #ifndef NOGRAPHICS
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1084 CAL_SetupGrFile ();
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1091 drawcachebox = CAL_DialogDraw;
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1092 updatecachebox = CAL_DialogUpdate;
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1093 finishcachebox = CAL_DialogFinish;*/
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1096 //==========================================================================
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1100 ======================
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1104 = Closes all files
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1106 ======================
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1109 void CA_Shutdown(void)
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1112 close(profilehandle);
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1117 close(audiohandle);*/
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1120 //===========================================================================
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1123 ======================
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1125 = CA_CacheAudioChunk
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1127 ======================
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1130 void CA_CacheAudioChunk (int chunk)
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1132 long pos,compressed;
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1133 #ifdef AUDIOHEADERLINKED
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1135 memptr bigbufferseg;
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1139 if (audiosegs[chunk])
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1141 MM_SetPurge (&(memptr)audiosegs[chunk],0);
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1142 return; // allready in memory
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1145 // MDM begin - (GAMERS EDGE)
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1147 if (!FindFile("AUDIO."EXT,NULL,2))
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1148 Quit("CA_CacheAudioChunk(): Can't find audio files.");
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1153 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
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1154 // a larger buffer
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1156 pos = audiostarts[chunk];
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1157 compressed = audiostarts[chunk+1]-pos;
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1159 lseek(audiohandle,pos,SEEK_SET);
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1161 #ifndef AUDIOHEADERLINKED
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1163 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
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1167 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
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1171 if (compressed<=BUFFERSIZE)
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1173 CA_FarRead(audiohandle,bufferseg,compressed);
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1174 source = bufferseg;
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1178 MM_GetPtr(&bigbufferseg,compressed);
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1181 MM_SetLock (&bigbufferseg,true);
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1182 CA_FarRead(audiohandle,bigbufferseg,compressed);
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1183 source = bigbufferseg;
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1186 expanded = *(long far *)source;
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1187 source += 4; // skip over length
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1188 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
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1191 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
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1194 if (compressed>BUFFERSIZE)
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1195 MM_FreePtr(&bigbufferseg);
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1199 //===========================================================================
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1202 ======================
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1204 = CA_LoadAllSounds
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1206 = Purges all sounds, then loads all new ones (mode switch)
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1208 ======================
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1211 void CA_LoadAllSounds (void)
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1215 switch (oldsoundmode)
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1220 start = STARTPCSOUNDS;
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1223 start = STARTADLIBSOUNDS;
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1227 for (i=0;i<NUMSOUNDS;i++,start++)
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1228 if (audiosegs[start])
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1229 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
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1233 switch (SoundMode)
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1238 start = STARTPCSOUNDS;
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1241 start = STARTADLIBSOUNDS;
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1245 for (i=0;i<NUMSOUNDS;i++,start++)
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1246 CA_CacheAudioChunk (start);
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1248 oldsoundmode = SoundMode;
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1251 //===========================================================================
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1253 //++++#if GRMODE == EGAGR
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1256 ======================
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1260 = Make a shifted (one byte wider) copy of a sprite into another area
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1262 ======================
\r
1265 unsigned static sheight,swidth;
\r
1266 boolean static dothemask;
\r
1268 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1269 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1272 sheight = height; // because we are going to reassign bp
\r
1274 dothemask = domask;
\r
1276 asm mov ax,[segment]
\r
1277 asm mov ds,ax // source and dest are in same segment, and all local
\r
1279 asm mov bx,[source]
\r
1282 asm mov bp,[pixshift]
\r
1284 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1286 asm cmp [ss:dothemask],0
\r
1290 // table shift the mask
\r
1292 asm mov dx,[ss:sheight]
\r
1296 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1297 asm mov cx,ss:[swidth]
\r
1301 asm mov al,[bx] // source
\r
1303 asm inc bx // next source byte
\r
1307 asm mov ax,[bp+si] // table shift into two bytes
\r
1309 asm and [di],al // and with first byte
\r
1311 asm mov [di],ah // replace next byte
\r
1313 asm loop domaskbyte
\r
1315 asm inc di // the last shifted byte has 1s in it
\r
1322 // table shift the data
\r
1324 asm mov dx,ss:[sheight]
\r
1326 asm shl dx,1 // four planes of data
\r
1330 asm mov BYTE PTR [di],0 // 0 first byte
\r
1331 asm mov cx,ss:[swidth]
\r
1335 asm mov al,[bx] // source
\r
1336 asm inc bx // next source byte
\r
1340 asm mov ax,[bp+si] // table shift into two bytes
\r
1341 asm or [di],al // or with first byte
\r
1343 asm mov [di],ah // replace next byte
\r
1345 asm loop dodatabyte
\r
1347 asm inc di // the last shifted byte has 0s in it
\r
1355 asm mov ax,ss // restore data segment
\r
1362 //===========================================================================
\r
1365 ======================
\r
1369 = Generate shifts and set up sprite structure for a given sprite
\r
1371 ======================
\r
1374 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1377 unsigned shiftstarts[5];
\r
1378 unsigned smallplane,bigplane,expanded;
\r
1379 spritetabletype far *spr;
\r
1380 spritetype _seg *dest;
\r
1382 #if GRMODE == CGAGR
\r
1384 // CGA has no pel panning, so shifts are never needed
\r
1386 spr = &spritetable[chunk-STARTSPRITES];
\r
1387 smallplane = spr->width*spr->height;
\r
1388 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1391 dest = (spritetype _seg *)grsegs[chunk];
\r
1392 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1393 dest->planesize[0] = smallplane;
\r
1394 dest->width[0] = spr->width;
\r
1397 // expand the unshifted shape
\r
1399 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1404 #if GRMODE == EGAGR
\r
1407 // calculate sizes
\r
1409 spr = &spritetable[chunk-STARTSPRITES];
\r
1410 smallplane = spr->width*spr->height;
\r
1411 bigplane = (spr->width+1)*spr->height;
\r
1413 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1414 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1415 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1416 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1417 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1419 expanded = shiftstarts[spr->shifts];
\r
1420 MM_GetPtr (&grsegs[chunk],expanded);
\r
1423 dest = (spritetype _seg *)grsegs[chunk];
\r
1426 // expand the unshifted shape
\r
1428 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1431 // make the shifts!
\r
1433 switch (spr->shifts)
\r
1438 dest->sourceoffset[i] = shiftstarts[0];
\r
1439 dest->planesize[i] = smallplane;
\r
1440 dest->width[i] = spr->width;
\r
1447 dest->sourceoffset[i] = shiftstarts[0];
\r
1448 dest->planesize[i] = smallplane;
\r
1449 dest->width[i] = spr->width;
\r
1453 dest->sourceoffset[i] = shiftstarts[1];
\r
1454 dest->planesize[i] = bigplane;
\r
1455 dest->width[i] = spr->width+1;
\r
1457 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1458 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1462 dest->sourceoffset[0] = shiftstarts[0];
\r
1463 dest->planesize[0] = smallplane;
\r
1464 dest->width[0] = spr->width;
\r
1466 dest->sourceoffset[1] = shiftstarts[1];
\r
1467 dest->planesize[1] = bigplane;
\r
1468 dest->width[1] = spr->width+1;
\r
1469 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1470 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1472 dest->sourceoffset[2] = shiftstarts[2];
\r
1473 dest->planesize[2] = bigplane;
\r
1474 dest->width[2] = spr->width+1;
\r
1475 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1476 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1478 dest->sourceoffset[3] = shiftstarts[3];
\r
1479 dest->planesize[3] = bigplane;
\r
1480 dest->width[3] = spr->width+1;
\r
1481 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1482 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1487 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1493 //===========================================================================
\r
1497 ======================
\r
1499 = CAL_ExpandGrChunk
\r
1501 = Does whatever is needed with a pointer to a compressed chunk
\r
1503 ======================
\r
1506 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1511 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1514 // expanded sizes of tile8/16/32 are implicit
\r
1517 #if GRMODE == EGAGR
\r
1519 #define MASKBLOCK 40
\r
1522 #if GRMODE == CGAGR
\r
1524 #define MASKBLOCK 32
\r
1527 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1528 expanded = BLOCK*NUMTILE8;
\r
1529 else if (chunk<STARTTILE16)
\r
1530 expanded = MASKBLOCK*NUMTILE8M;
\r
1531 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1532 expanded = BLOCK*4;
\r
1533 else if (chunk<STARTTILE32)
\r
1534 expanded = MASKBLOCK*4;
\r
1535 else if (chunk<STARTTILE32M)
\r
1536 expanded = BLOCK*16;
\r
1538 expanded = MASKBLOCK*16;
\r
1543 // everything else has an explicit size longword
\r
1545 expanded = *(long far *)source;
\r
1546 source += 4; // skip over length
\r
1550 // allocate final space, decompress it, and free bigbuffer
\r
1551 // Sprites need to have shifts made and various other junk
\r
1553 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1554 CAL_CacheSprite(chunk,source);
\r
1557 MM_GetPtr (&grsegs[chunk],expanded);
\r
1560 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1566 ======================
\r
1570 = Gets a chunk off disk, optimizing reads to general buffer
\r
1572 ======================
\r
1575 void CAL_ReadGrChunk (int chunk)
\r
1577 long pos,compressed;
\r
1578 memptr bigbufferseg;
\r
1583 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1584 // a larger buffer
\r
1586 pos = GRFILEPOS(chunk);
\r
1587 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1591 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1594 compressed = GRFILEPOS(next)-pos;
\r
1596 lseek(grhandle,pos,SEEK_SET);
\r
1598 if (compressed<=BUFFERSIZE)
\r
1600 CA_FarRead(grhandle,bufferseg,compressed);
\r
1601 source = bufferseg;
\r
1605 MM_GetPtr(&bigbufferseg,compressed);
\r
1608 MM_SetLock (&bigbufferseg,true);
\r
1609 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1610 source = bigbufferseg;
\r
1613 CAL_ExpandGrChunk (chunk,source);
\r
1615 if (compressed>BUFFERSIZE)
\r
1616 MM_FreePtr(&bigbufferseg);
\r
1620 ======================
\r
1624 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1626 ======================
\r
1629 void CA_CacheGrChunk (int chunk)
\r
1631 long pos,compressed;
\r
1632 memptr bigbufferseg;
\r
1636 grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1637 if (grsegs[chunk])
\r
1639 MM_SetPurge (&grsegs[chunk],0);
\r
1640 return; // allready in memory
\r
1643 // MDM begin - (GAMERS EDGE)
\r
1645 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1646 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1651 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1652 // a larger buffer
\r
1654 pos = GRFILEPOS(chunk);
\r
1655 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1659 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1662 compressed = GRFILEPOS(next)-pos;
\r
1664 lseek(grhandle,pos,SEEK_SET);
\r
1666 if (compressed<=BUFFERSIZE)
\r
1668 CA_FarRead(grhandle,bufferseg,compressed);
\r
1669 source = bufferseg;
\r
1673 MM_GetPtr(&bigbufferseg,compressed);
\r
1674 MM_SetLock (&bigbufferseg,true);
\r
1675 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1676 source = bigbufferseg;
\r
1679 CAL_ExpandGrChunk (chunk,source);
\r
1681 if (compressed>BUFFERSIZE)
\r
1682 MM_FreePtr(&bigbufferseg);
\r
1687 //==========================================================================
\r
1690 ======================
\r
1694 ======================
\r
1697 void CA_CacheMap (int mapnum)
\r
1699 long pos,compressed;
\r
1701 memptr *dest,bigbufferseg;
\r
1703 unsigned far *source;
\r
1704 #ifdef MAPHEADERLINKED
\r
1705 memptr buffer2seg;
\r
1710 // MDM begin - (GAMERS EDGE)
\r
1712 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1713 Quit("CA_CacheMap(): Can't find level files.");
\r
1719 // free up memory from last map
\r
1721 if (mapon>-1 && mapheaderseg[mapon])
\r
1722 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1723 for (plane=0;plane<MAPPLANES;plane++)
\r
1724 if (mapsegs[plane])
\r
1725 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1731 // load map header
\r
1732 // The header will be cached if it is still around
\r
1734 if (!mapheaderseg[mapnum])
\r
1736 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1737 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1738 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1740 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1741 lseek(maphandle,pos,SEEK_SET);
\r
1742 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1745 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1748 // load the planes in
\r
1749 // If a plane's pointer still exists it will be overwritten (levels are
\r
1750 // allways reloaded, never cached)
\r
1753 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1755 for (plane = 0; plane<MAPPLANES; plane++)
\r
1757 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1758 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1761 continue; // the plane is not used in this game
\r
1763 dest = &(memptr)mapsegs[plane];
\r
1764 MM_GetPtr(dest,size);
\r
1766 lseek(maphandle,pos,SEEK_SET);
\r
1767 if (compressed<=BUFFERSIZE)
\r
1768 source = bufferseg;
\r
1771 MM_GetPtr(&bigbufferseg,compressed);
\r
1772 MM_SetLock (&bigbufferseg,true);
\r
1773 source = bigbufferseg;
\r
1776 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1777 #ifdef MAPHEADERLINKED
\r
1779 // unhuffman, then unRLEW
\r
1780 // The huffman'd chunk has a two byte expanded length first
\r
1781 // The resulting RLEW chunk also does, even though it's not really
\r
1784 expanded = *source;
\r
1786 MM_GetPtr (&buffer2seg,expanded);
\r
1787 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1788 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1789 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1790 MM_FreePtr (&buffer2seg);
\r
1794 // unRLEW, skipping expanded length
\r
1796 CA_RLEWexpand (source+1, *dest,size,
\r
1797 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1800 if (compressed>BUFFERSIZE)
\r
1801 MM_FreePtr(&bigbufferseg);
\r
1805 //===========================================================================
\r
1808 ======================
\r
1812 = Goes up a bit level in the needed lists and clears it out.
\r
1813 = Everything is made purgable
\r
1815 ======================
\r
1818 void CA_UpLevel (void)
\r
1820 if (ca_levelnum==7)
\r
1821 Quit ("CA_UpLevel: Up past level 7!");
\r
1827 //===========================================================================
\r
1830 ======================
\r
1834 = Goes down a bit level in the needed lists and recaches
\r
1835 = everything from the lower level
\r
1837 ======================
\r
1840 void CA_DownLevel (void)
\r
1843 Quit ("CA_DownLevel: Down past level 0!");
\r
1846 CA_CacheMarks(NULL);
\r
1849 //===========================================================================
\r
1852 ======================
\r
1856 = Clears out all the marks at the current level
\r
1858 ======================
\r
1861 void CA_ClearMarks (void)
\r
1865 for (i=0;i<NUMCHUNKS;i++)
\r
1866 grneeded[i]&=~ca_levelbit;
\r
1870 //===========================================================================
\r
1873 ======================
\r
1875 = CA_ClearAllMarks
\r
1877 = Clears out all the marks on all the levels
\r
1879 ======================
\r
1882 void CA_ClearAllMarks (void)
\r
1884 _fmemset (grneeded,0,sizeof(grneeded));
\r
1890 //===========================================================================
\r
1893 ======================
\r
1897 ======================
\r
1900 void CA_FreeGraphics (void)
\r
1904 for (i=0;i<NUMCHUNKS;i++)
\r
1906 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1911 ======================
\r
1915 = Make everything possible purgable
\r
1917 ======================
\r
1920 void CA_SetAllPurge (void)
\r
1927 // free cursor sprite and background save
\r
1932 // free map headers and map planes
\r
1934 for (i=0;i<NUMMAPS;i++)
\r
1935 if (mapheaderseg[i])
\r
1936 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
1940 MM_FreePtr (&(memptr)mapsegs[i]);
\r
1945 for (i=0;i<NUMSNDCHUNKS;i++)
\r
1947 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
1952 CA_FreeGraphics ();
\r
1956 void CA_SetGrPurge (void)
\r
1963 for (i=0;i<NUMCHUNKS;i++)
\r
1965 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1969 //===========================================================================
\r
1973 ======================
\r
1977 ======================
\r
1980 #define NUMBARS (17l*8)
\r
1983 unsigned thx,thy,lastx;
\r
1984 long barx,barstep;
\r
1986 void CAL_DialogDraw (char *title,unsigned numcache)
\r
1988 unsigned homex,homey,x;
\r
1990 barstep = (NUMBARS<<16)/numcache;
\r
1993 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
1995 US_CenterWindow (20,8);
\r
1999 US_CPrint ("Loading");
\r
2000 fontcolor = F_SECONDCOLOR;
\r
2001 US_CPrint (title);
\r
2002 fontcolor = F_BLACK;
\r
2005 // draw thermometer bar
\r
2009 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2010 VWB_DrawTile8(thx,thy+8,3);
\r
2011 VWB_DrawTile8(thx,thy+16,6);
\r
2012 VWB_DrawTile8(thx+17*8,thy,2);
\r
2013 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2014 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2015 for (x=thx+8;x<thx+17*8;x+=8)
\r
2017 VWB_DrawTile8(x,thy,1);
\r
2018 VWB_DrawTile8(x,thy+8,4);
\r
2019 VWB_DrawTile8(x,thy+16,7);
\r
2022 thx += 4; // first line location
\r
2024 barx = (long)thx<<16;
\r
2027 VW_UpdateScreen();
\r
2032 ======================
\r
2034 = CAL_DialogUpdate
\r
2036 ======================
\r
2039 void CAL_DialogUpdate (void)
\r
2045 if (xh - lastx > BARSTEP)
\r
2047 for (x=lastx;x<=xh;x++)
\r
2048 #if GRMODE == EGAGR
\r
2049 VWB_Vlin (thy,thy+13,x,14);
\r
2051 #if GRMODE == CGAGR
\r
2052 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2055 VW_UpdateScreen();
\r
2060 ======================
\r
2062 = CAL_DialogFinish
\r
2064 ======================
\r
2067 void CAL_DialogFinish (void)
\r
2071 xh = thx + NUMBARS;
\r
2072 for (x=lastx;x<=xh;x++)
\r
2073 #if GRMODE == EGAGR
\r
2074 VWB_Vlin (thy,thy+13,x,14);
\r
2076 #if GRMODE == CGAGR
\r
2077 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2079 VW_UpdateScreen();
\r
2083 //===========================================================================
\r
2086 ======================
\r
2090 ======================
\r
2092 #define MAXEMPTYREAD 1024
\r
2094 void CA_CacheMarks (char *title)
\r
2097 int i,next,numcache;
\r
2098 long pos,endpos,nextpos,nextendpos,compressed;
\r
2099 long bufferstart,bufferend; // file position of general buffer
\r
2101 memptr bigbufferseg;
\r
2103 dialog = (title!=NULL);
\r
2107 // go through and make everything not needed purgable
\r
2109 for (i=0;i<NUMCHUNKS;i++)
\r
2110 if (grneeded[i]&ca_levelbit)
\r
2112 if (grsegs[i]) // its allready in memory, make
\r
2113 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2119 if (grsegs[i]) // not needed, so make it purgeable
\r
2120 MM_SetPurge(&grsegs[i],3);
\r
2123 if (!numcache) // nothing to cache!
\r
2126 // MDM begin - (GAMERS EDGE)
\r
2128 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2129 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2136 write(profilehandle,title,strlen(title));
\r
2137 write(profilehandle,"\n",1);
\r
2140 drawcachebox(title,numcache);
\r
2144 // go through and load in anything still needed
\r
2146 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2148 for (i=0;i<NUMCHUNKS;i++)
\r
2149 if ( (grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2152 // update thermometer
\r
2154 if (dialog && updatecachebox)
\r
2155 updatecachebox ();
\r
2157 pos = GRFILEPOS(i);
\r
2162 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2165 compressed = GRFILEPOS(next)-pos;
\r
2166 endpos = pos+compressed;
\r
2168 if (compressed<=BUFFERSIZE)
\r
2170 if (bufferstart<=pos
\r
2171 && bufferend>= endpos)
\r
2173 // data is allready in buffer
\r
2174 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2178 // load buffer with a new block from disk
\r
2179 // try to get as many of the needed blocks in as possible
\r
2180 while ( next < NUMCHUNKS )
\r
2182 while (next < NUMCHUNKS &&
\r
2183 !(grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2185 if (next == NUMCHUNKS)
\r
2188 nextpos = GRFILEPOS(next);
\r
2189 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2191 nextendpos = GRFILEPOS(next);
\r
2192 if (nextpos - endpos <= MAXEMPTYREAD
\r
2193 && nextendpos-pos <= BUFFERSIZE)
\r
2194 endpos = nextendpos;
\r
2196 next = NUMCHUNKS; // read pos to posend
\r
2199 lseek(grhandle,pos,SEEK_SET);
\r
2200 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2201 bufferstart = pos;
\r
2202 bufferend = endpos;
\r
2203 source = bufferseg;
\r
2208 // big chunk, allocate temporary buffer
\r
2209 MM_GetPtr(&bigbufferseg,compressed);
\r
2212 MM_SetLock (&bigbufferseg,true);
\r
2213 lseek(grhandle,pos,SEEK_SET);
\r
2214 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2215 source = bigbufferseg;
\r
2218 CAL_ExpandGrChunk (i,source);
\r
2222 if (compressed>BUFFERSIZE)
\r
2223 MM_FreePtr(&bigbufferseg);
\r
2228 // finish up any thermometer remnants
\r
2230 if (dialog && finishcachebox)
\r