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_head.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,
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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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178 void CA_OpenDebug (void)
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180 unlink ("DEBUG.TXT");
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181 debughandle = open("DEBUG.TXT", O_CREAT | O_WRONLY | O_TEXT);
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184 void CA_CloseDebug (void)
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186 close (debughandle);
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192 ============================
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194 = CAL_GetGrChunkLength
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196 = Gets the length of an explicit length chunk (not tiles)
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197 = The file pointer is positioned so the compressed data can be read in next.
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199 ============================
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202 void CAL_GetGrChunkLength (int chunk)
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204 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
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205 read(grhandle,&chunkexplen,sizeof(chunkexplen));
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206 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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211 ==========================
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215 = Read from a file to a far pointer
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217 ==========================
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220 boolean CA_FarRead (int handle, byte far *dest, long length)
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222 if (length>0xffffl)
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223 printf("CA_FarRead doesn't support 64K reads yet!\n");
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226 asm mov bx,[handle]
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227 asm mov cx,[WORD PTR length]
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228 asm mov dx,[WORD PTR dest]
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229 asm mov ds,[WORD PTR dest+2]
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230 asm mov ah,0x3f // READ w/handle
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237 asm cmp ax,[WORD PTR length]
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239 errno = EINVFMT; // user manager knows this is bad read
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247 ==========================
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251 = Write from a file to a far pointer
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253 ==========================
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256 boolean CA_FarWrite (int handle, byte far *source, long length)
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258 if (length>0xffffl)
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259 Quit ("CA_FarWrite doesn't support 64K reads yet!");
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262 asm mov bx,[handle]
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263 asm mov cx,[WORD PTR length]
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264 asm mov dx,[WORD PTR source]
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265 asm mov ds,[WORD PTR source+2]
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266 asm mov ah,0x40 // WRITE w/handle
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273 asm cmp ax,[WORD PTR length]
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275 errno = ENOMEM; // user manager knows this is bad write
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284 ==========================
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288 = Reads a file into an allready allocated buffer
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290 ==========================
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293 boolean CA_ReadFile (char *filename, memptr *ptr)
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298 if ((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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301 size = filelength (handle);
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302 if (!CA_FarRead (handle,*ptr,size))
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314 ==========================
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318 = Allocate space for and load a file
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320 ==========================
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323 boolean CA_LoadFile (char *filename, memptr *ptr)
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328 if ((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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331 size = filelength (handle);
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332 MM_GetPtr (ptr,size);
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333 if (!CA_FarRead (handle,*ptr,size))
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343 ============================================================================
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345 COMPRESSION routines, see JHUFF.C for more
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347 ============================================================================
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355 = CAL_OptimizeNodes
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357 = Goes through a huffman table and changes the 256-511 node numbers to the
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358 = actular address of the node. Must be called before CAL_HuffExpand
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363 void CAL_OptimizeNodes(huffnode *table)
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370 for (i=0;i<255;i++)
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372 if (node->bit0 >= 256)
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373 node->bit0 = (unsigned)(table+(node->bit0-256));
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374 if (node->bit1 >= 256)
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375 node->bit1 = (unsigned)(table+(node->bit1-256));
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383 ======================
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387 = Length is the length of the EXPANDED data
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389 ======================
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392 void CAL_HuffExpand (byte huge *source, byte huge *dest,
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393 long length,huffnode *hufftable)
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395 // unsigned bit,byte,node,code;
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396 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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398 // huffnode *nodeon;
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400 headptr = hufftable+254; // head node is allways node 254
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402 source++; // normalize
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407 sourceseg = FP_SEG(source);
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408 sourceoff = FP_OFF(source);
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409 destseg = FP_SEG(dest);
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410 destoff = FP_OFF(dest);
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411 endoff = destoff+length;
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416 // ss:bx node pointer
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419 if (length <0xfff0)
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422 //--------------------------
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423 // expand less than 64k of data
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424 //--------------------------
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426 asm mov bx,[headptr]
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428 asm mov si,[sourceoff]
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429 asm mov di,[destoff]
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430 asm mov es,[destseg]
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431 asm mov ds,[sourceseg]
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432 asm mov ax,[endoff]
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434 asm mov ch,[si] // load first byte
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439 asm test ch,cl // bit set?
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441 asm mov dx,[ss:bx] // take bit0 path from node
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442 asm shl cl,1 // advance to next bit position
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443 asm jc newbyteshort
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444 asm jnc sourceupshort
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447 asm mov dx,[ss:bx+2] // take bit1 path
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448 asm shl cl,1 // advance to next bit position
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449 asm jnc sourceupshort
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452 asm mov ch,[si] // load next byte
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454 asm mov cl,1 // back to first bit
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457 asm or dh,dh // if dx<256 its a byte, else move node
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458 asm jz storebyteshort
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459 asm mov bx,dx // next node = (huffnode *)code
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460 asm jmp expandshort
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464 asm inc di // write a decopmpressed byte out
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465 asm mov bx,[headptr] // back to the head node for next bit
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467 asm cmp di,ax // done?
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468 asm jne expandshort
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473 //--------------------------
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474 // expand more than 64k of data
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475 //--------------------------
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479 asm mov bx,[headptr]
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482 asm mov si,[sourceoff]
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483 asm mov di,[destoff]
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484 asm mov es,[destseg]
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485 asm mov ds,[sourceseg]
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487 asm lodsb // load first byte
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490 asm test al,cl // bit set?
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492 asm mov dx,[ss:bx] // take bit0 path from node
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495 asm mov dx,[ss:bx+2] // take bit1 path
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498 asm shl cl,1 // advance to next bit position
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501 asm cmp si,0x10 // normalize ds:si
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508 asm mov cl,1 // back to first bit
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511 asm or dh,dh // if dx<256 its a byte, else move node
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513 asm mov bx,dx // next node = (huffnode *)code
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518 asm inc di // write a decopmpressed byte out
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519 asm mov bx,[headptr] // back to the head node for next bit
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521 asm cmp di,0x10 // normalize es:di
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529 asm sub [WORD PTR ss:length],1
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531 asm dec [WORD PTR ss:length+2]
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532 asm jns expand // when length = ffff ffff, done
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543 ======================
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545 = CAL_CarmackExpand
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547 = Length is the length of the EXPANDED data
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549 ======================
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552 #define NEARTAG 0xa7
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553 #define FARTAG 0xa8
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555 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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557 unsigned ch,chhigh,count,offset;
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558 unsigned far *copyptr, far *inptr, far *outptr;
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569 if (chhigh == NEARTAG)
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573 { // have to insert a word containing the tag byte
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574 ch |= *((unsigned char far *)inptr)++;
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580 offset = *((unsigned char far *)inptr)++;
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581 copyptr = outptr - offset;
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584 *outptr++ = *copyptr++;
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587 else if (chhigh == FARTAG)
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591 { // have to insert a word containing the tag byte
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592 ch |= *((unsigned char far *)inptr)++;
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599 copyptr = dest + offset;
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602 *outptr++ = *copyptr++;
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616 ======================
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620 ======================
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623 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
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627 unsigned value,count,i;
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628 unsigned huge *start,huge *end;
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632 end = source + (length+1)/2;
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641 while (*source == value && source<end)
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646 if (count>3 || value == rlewtag)
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649 // send a tag / count / value string
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658 // send word without compressing
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660 for (i=1;i<=count;i++)
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664 } while (source<end);
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666 complength = 2*(dest-start);
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672 ======================
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675 = length is EXPANDED length
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677 ======================
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680 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
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683 // unsigned value,count,i;
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684 unsigned huge *end;
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685 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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695 if (value != rlewtag)
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703 // compressed string
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707 for (i=1;i<=count;i++)
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710 } while (dest<end);
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713 end = dest + (length)/2;
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714 sourceseg = FP_SEG(source);
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715 sourceoff = FP_OFF(source);
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716 destseg = FP_SEG(dest);
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717 destoff = FP_OFF(dest);
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718 endseg = FP_SEG(end);
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719 endoff = FP_OFF(end);
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723 // ax = source value
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725 // cx = repeat counts
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728 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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732 asm mov si,sourceoff
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735 asm mov ds,sourceseg
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746 asm mov cx,ax // repeat count
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747 asm lodsw // repeat value
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752 asm cmp si,0x10 // normalize ds:si
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764 asm cmp di,0x10 // normalize es:di
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777 asm cmp di,ss:endoff
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780 asm cmp ax,ss:endseg
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791 =============================================================================
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793 CACHE MANAGER ROUTINES
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795 =============================================================================
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799 ======================
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803 ======================
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806 void CAL_SetupGrFile (void)
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811 #ifdef GRHEADERLINKED
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813 #if GRMODE == EGAGR
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814 grhuffman = (huffnode *)&EGAdict;
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815 grstarts = (long _seg *)FP_SEG(&EGAhead);
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817 #if GRMODE == CGAGR
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818 grhuffman = (huffnode *)&CGAdict;
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819 grstarts = (long _seg *)FP_SEG(&CGAhead);
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822 CAL_OptimizeNodes (grhuffman);
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827 // load ???dict.ext (huffman dictionary for graphics files)
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830 if ((handle = open(GREXT"DICT."EXT,
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831 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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832 Quit ("Can't open "GREXT"DICT."EXT"!");
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834 read(handle, &grhuffman, sizeof(grhuffman));
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836 CAL_OptimizeNodes (grhuffman);
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838 // load the data offsets from ???head.ext
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840 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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842 if ((handle = open(GREXT"HEAD."EXT,
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843 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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844 Quit ("Can't open "GREXT"HEAD."EXT"!");
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846 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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854 // Open the graphics file, leaving it open until the game is finished
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856 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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857 if (grhandle == -1)
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858 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
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862 // load the pic and sprite headers into the arrays in the data segment
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865 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
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866 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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867 MM_GetPtr(&compseg,chunkcomplen);
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868 CA_FarRead (grhandle,compseg,chunkcomplen);
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869 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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870 MM_FreePtr(&compseg);
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874 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
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875 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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876 MM_GetPtr(&compseg,chunkcomplen);
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877 CA_FarRead (grhandle,compseg,chunkcomplen);
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878 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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879 MM_FreePtr(&compseg);
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883 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
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884 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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885 MM_GetPtr(&compseg,chunkcomplen);
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886 CA_FarRead (grhandle,compseg,chunkcomplen);
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887 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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888 MM_FreePtr(&compseg);
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893 //==========================================================================
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897 ======================
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901 ======================
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904 void CAL_SetupMapFile (void)
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910 // load maphead.ext (offsets and tileinfo for map file)
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912 #ifndef MAPHEADERLINKED
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913 if ((handle = open("MAPHEAD."EXT,
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914 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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915 Quit ("Can't open MAPHEAD."EXT"!");
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916 length = filelength(handle);
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917 MM_GetPtr (&(memptr)tinf,length);
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918 CA_FarRead(handle, tinf, length);
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922 tinf = (byte _seg *)FP_SEG(&maphead);
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927 // open the data file
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929 #ifdef MAPHEADERLINKED
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930 if ((maphandle = open("GAMEMAPS."EXT,
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931 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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932 Quit ("Can't open GAMEMAPS."EXT"!");
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934 if ((maphandle = open("MAPTEMP."EXT,
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935 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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936 Quit ("Can't open MAPTEMP."EXT"!");
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940 //==========================================================================
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944 ======================
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946 = CAL_SetupAudioFile
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948 ======================
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951 void CAL_SetupAudioFile (void)
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957 // load maphead.ext (offsets and tileinfo for map file)
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959 #ifndef AUDIOHEADERLINKED
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960 if ((handle = open("AUDIOHED."EXT,
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961 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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962 Quit ("Can't open AUDIOHED."EXT"!");
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963 length = filelength(handle);
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964 MM_GetPtr (&(memptr)audiostarts,length);
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965 CA_FarRead(handle, (byte far *)audiostarts, length);
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968 audiohuffman = (huffnode *)&audiodict;
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969 CAL_OptimizeNodes (audiohuffman);
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970 audiostarts = (long _seg *)FP_SEG(&audiohead);
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974 // open the data file
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976 #ifndef AUDIOHEADERLINKED
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977 if ((audiohandle = open("AUDIOT."EXT,
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978 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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979 Quit ("Can't open AUDIOT."EXT"!");
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981 if ((audiohandle = open("AUDIO."EXT,
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982 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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983 Quit ("Can't open AUDIO."EXT"!");
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987 //==========================================================================
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991 ======================
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995 = Open all files and load in headers
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997 ======================
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1000 void CA_Startup (void)
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1003 unlink ("PROFILE.TXT");
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1004 profilehandle = open("PROFILE.TXT", O_CREAT | O_WRONLY | O_TEXT);
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1007 // MDM begin - (GAMERS EDGE)
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1009 if (!FindFile("AUDIO."EXT,NULL,2))
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1010 Quit("CA_Startup(): Can't find audio files.");
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1015 CAL_SetupAudioFile ();
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1018 // MDM begin - (GAMERS EDGE)
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1020 if (!FindFile("GAMEMAPS."EXT,NULL,1))
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1021 Quit("CA_Startup(): Can't find level files.");
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1026 CAL_SetupMapFile ();
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1029 // MDM begin - (GAMERS EDGE)
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1031 if (!FindFile("EGAGRAPH."EXT,NULL,2))
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1032 Quit("CA_Startup(): Can't find graphics files.");
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1036 #ifndef NOGRAPHICS
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1037 CAL_SetupGrFile ();
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1044 drawcachebox = CAL_DialogDraw;
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1045 updatecachebox = CAL_DialogUpdate;
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1046 finishcachebox = CAL_DialogFinish;
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1049 //==========================================================================
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1053 ======================
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1057 = Closes all files
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1059 ======================
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1062 void CA_Shutdown (void)
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1065 close (profilehandle);
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1068 close (maphandle);
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1070 close (audiohandle);
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1073 //===========================================================================
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1076 ======================
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1078 = CA_CacheAudioChunk
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1080 ======================
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1083 void CA_CacheAudioChunk (int chunk)
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1085 long pos,compressed;
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1086 #ifdef AUDIOHEADERLINKED
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1088 memptr bigbufferseg;
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1092 if (audiosegs[chunk])
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1094 MM_SetPurge (&(memptr)audiosegs[chunk],0);
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1095 return; // allready in memory
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1098 // MDM begin - (GAMERS EDGE)
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1100 if (!FindFile("AUDIO."EXT,NULL,2))
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1101 Quit("CA_CacheAudioChunk(): Can't find audio files.");
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1106 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
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1107 // a larger buffer
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1109 pos = audiostarts[chunk];
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1110 compressed = audiostarts[chunk+1]-pos;
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1112 lseek(audiohandle,pos,SEEK_SET);
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1114 #ifndef AUDIOHEADERLINKED
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1116 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
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1120 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
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1124 if (compressed<=BUFFERSIZE)
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1126 CA_FarRead(audiohandle,bufferseg,compressed);
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1127 source = bufferseg;
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1131 MM_GetPtr(&bigbufferseg,compressed);
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1134 MM_SetLock (&bigbufferseg,true);
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1135 CA_FarRead(audiohandle,bigbufferseg,compressed);
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1136 source = bigbufferseg;
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1139 expanded = *(long far *)source;
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1140 source += 4; // skip over length
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1141 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
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1144 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
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1147 if (compressed>BUFFERSIZE)
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1148 MM_FreePtr(&bigbufferseg);
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1152 //===========================================================================
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1155 ======================
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1157 = CA_LoadAllSounds
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1159 = Purges all sounds, then loads all new ones (mode switch)
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1161 ======================
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1164 void CA_LoadAllSounds (void)
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1168 switch (oldsoundmode)
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1173 start = STARTPCSOUNDS;
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1176 start = STARTADLIBSOUNDS;
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1180 for (i=0;i<NUMSOUNDS;i++,start++)
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1181 if (audiosegs[start])
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1182 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
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1186 switch (SoundMode)
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1191 start = STARTPCSOUNDS;
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1194 start = STARTADLIBSOUNDS;
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1198 for (i=0;i<NUMSOUNDS;i++,start++)
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1199 CA_CacheAudioChunk (start);
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1201 oldsoundmode = SoundMode;
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1204 //===========================================================================
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1206 #if GRMODE == EGAGR
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1209 ======================
\r
1213 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1215 ======================
\r
1218 unsigned static sheight,swidth;
\r
1219 boolean static dothemask;
\r
1221 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1222 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1225 sheight = height; // because we are going to reassign bp
\r
1227 dothemask = domask;
\r
1229 asm mov ax,[segment]
\r
1230 asm mov ds,ax // source and dest are in same segment, and all local
\r
1232 asm mov bx,[source]
\r
1235 asm mov bp,[pixshift]
\r
1237 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1239 asm cmp [ss:dothemask],0
\r
1243 // table shift the mask
\r
1245 asm mov dx,[ss:sheight]
\r
1249 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1250 asm mov cx,ss:[swidth]
\r
1254 asm mov al,[bx] // source
\r
1256 asm inc bx // next source byte
\r
1260 asm mov ax,[bp+si] // table shift into two bytes
\r
1262 asm and [di],al // and with first byte
\r
1264 asm mov [di],ah // replace next byte
\r
1266 asm loop domaskbyte
\r
1268 asm inc di // the last shifted byte has 1s in it
\r
1275 // table shift the data
\r
1277 asm mov dx,ss:[sheight]
\r
1279 asm shl dx,1 // four planes of data
\r
1283 asm mov BYTE PTR [di],0 // 0 first byte
\r
1284 asm mov cx,ss:[swidth]
\r
1288 asm mov al,[bx] // source
\r
1289 asm inc bx // next source byte
\r
1293 asm mov ax,[bp+si] // table shift into two bytes
\r
1294 asm or [di],al // or with first byte
\r
1296 asm mov [di],ah // replace next byte
\r
1298 asm loop dodatabyte
\r
1300 asm inc di // the last shifted byte has 0s in it
\r
1308 asm mov ax,ss // restore data segment
\r
1315 //===========================================================================
\r
1318 ======================
\r
1322 = Generate shifts and set up sprite structure for a given sprite
\r
1324 ======================
\r
1327 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1330 unsigned shiftstarts[5];
\r
1331 unsigned smallplane,bigplane,expanded;
\r
1332 spritetabletype far *spr;
\r
1333 spritetype _seg *dest;
\r
1335 #if GRMODE == CGAGR
\r
1337 // CGA has no pel panning, so shifts are never needed
\r
1339 spr = &spritetable[chunk-STARTSPRITES];
\r
1340 smallplane = spr->width*spr->height;
\r
1341 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1344 dest = (spritetype _seg *)grsegs[chunk];
\r
1345 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1346 dest->planesize[0] = smallplane;
\r
1347 dest->width[0] = spr->width;
\r
1350 // expand the unshifted shape
\r
1352 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1357 #if GRMODE == EGAGR
\r
1360 // calculate sizes
\r
1362 spr = &spritetable[chunk-STARTSPRITES];
\r
1363 smallplane = spr->width*spr->height;
\r
1364 bigplane = (spr->width+1)*spr->height;
\r
1366 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1367 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1368 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1369 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1370 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1372 expanded = shiftstarts[spr->shifts];
\r
1373 MM_GetPtr (&grsegs[chunk],expanded);
\r
1376 dest = (spritetype _seg *)grsegs[chunk];
\r
1379 // expand the unshifted shape
\r
1381 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1384 // make the shifts!
\r
1386 switch (spr->shifts)
\r
1391 dest->sourceoffset[i] = shiftstarts[0];
\r
1392 dest->planesize[i] = smallplane;
\r
1393 dest->width[i] = spr->width;
\r
1400 dest->sourceoffset[i] = shiftstarts[0];
\r
1401 dest->planesize[i] = smallplane;
\r
1402 dest->width[i] = spr->width;
\r
1406 dest->sourceoffset[i] = shiftstarts[1];
\r
1407 dest->planesize[i] = bigplane;
\r
1408 dest->width[i] = spr->width+1;
\r
1410 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1411 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1415 dest->sourceoffset[0] = shiftstarts[0];
\r
1416 dest->planesize[0] = smallplane;
\r
1417 dest->width[0] = spr->width;
\r
1419 dest->sourceoffset[1] = shiftstarts[1];
\r
1420 dest->planesize[1] = bigplane;
\r
1421 dest->width[1] = spr->width+1;
\r
1422 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1423 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1425 dest->sourceoffset[2] = shiftstarts[2];
\r
1426 dest->planesize[2] = bigplane;
\r
1427 dest->width[2] = spr->width+1;
\r
1428 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1429 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1431 dest->sourceoffset[3] = shiftstarts[3];
\r
1432 dest->planesize[3] = bigplane;
\r
1433 dest->width[3] = spr->width+1;
\r
1434 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1435 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1440 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1446 //===========================================================================
\r
1450 ======================
\r
1452 = CAL_ExpandGrChunk
\r
1454 = Does whatever is needed with a pointer to a compressed chunk
\r
1456 ======================
\r
1459 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1464 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1467 // expanded sizes of tile8/16/32 are implicit
\r
1470 #if GRMODE == EGAGR
\r
1472 #define MASKBLOCK 40
\r
1475 #if GRMODE == CGAGR
\r
1477 #define MASKBLOCK 32
\r
1480 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1481 expanded = BLOCK*NUMTILE8;
\r
1482 else if (chunk<STARTTILE16)
\r
1483 expanded = MASKBLOCK*NUMTILE8M;
\r
1484 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1485 expanded = BLOCK*4;
\r
1486 else if (chunk<STARTTILE32)
\r
1487 expanded = MASKBLOCK*4;
\r
1488 else if (chunk<STARTTILE32M)
\r
1489 expanded = BLOCK*16;
\r
1491 expanded = MASKBLOCK*16;
\r
1496 // everything else has an explicit size longword
\r
1498 expanded = *(long far *)source;
\r
1499 source += 4; // skip over length
\r
1503 // allocate final space, decompress it, and free bigbuffer
\r
1504 // Sprites need to have shifts made and various other junk
\r
1506 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1507 CAL_CacheSprite(chunk,source);
\r
1510 MM_GetPtr (&grsegs[chunk],expanded);
\r
1513 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1519 ======================
\r
1523 = Gets a chunk off disk, optimizing reads to general buffer
\r
1525 ======================
\r
1528 void CAL_ReadGrChunk (int chunk)
\r
1530 long pos,compressed;
\r
1531 memptr bigbufferseg;
\r
1536 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1537 // a larger buffer
\r
1539 pos = GRFILEPOS(chunk);
\r
1540 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1544 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1547 compressed = GRFILEPOS(next)-pos;
\r
1549 lseek(grhandle,pos,SEEK_SET);
\r
1551 if (compressed<=BUFFERSIZE)
\r
1553 CA_FarRead(grhandle,bufferseg,compressed);
\r
1554 source = bufferseg;
\r
1558 MM_GetPtr(&bigbufferseg,compressed);
\r
1561 MM_SetLock (&bigbufferseg,true);
\r
1562 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1563 source = bigbufferseg;
\r
1566 CAL_ExpandGrChunk (chunk,source);
\r
1568 if (compressed>BUFFERSIZE)
\r
1569 MM_FreePtr(&bigbufferseg);
\r
1573 ======================
\r
1577 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1579 ======================
\r
1582 void CA_CacheGrChunk (int chunk)
\r
1584 long pos,compressed;
\r
1585 memptr bigbufferseg;
\r
1589 grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1590 if (grsegs[chunk])
\r
1592 MM_SetPurge (&grsegs[chunk],0);
\r
1593 return; // allready in memory
\r
1596 // MDM begin - (GAMERS EDGE)
\r
1598 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1599 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1604 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1605 // a larger buffer
\r
1607 pos = GRFILEPOS(chunk);
\r
1608 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1612 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1615 compressed = GRFILEPOS(next)-pos;
\r
1617 lseek(grhandle,pos,SEEK_SET);
\r
1619 if (compressed<=BUFFERSIZE)
\r
1621 CA_FarRead(grhandle,bufferseg,compressed);
\r
1622 source = bufferseg;
\r
1626 MM_GetPtr(&bigbufferseg,compressed);
\r
1627 MM_SetLock (&bigbufferseg,true);
\r
1628 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1629 source = bigbufferseg;
\r
1632 CAL_ExpandGrChunk (chunk,source);
\r
1634 if (compressed>BUFFERSIZE)
\r
1635 MM_FreePtr(&bigbufferseg);
\r
1640 //==========================================================================
\r
1643 ======================
\r
1647 ======================
\r
1650 void CA_CacheMap (int mapnum)
\r
1652 long pos,compressed;
\r
1654 memptr *dest,bigbufferseg;
\r
1656 unsigned far *source;
\r
1657 #ifdef MAPHEADERLINKED
\r
1658 memptr buffer2seg;
\r
1663 // MDM begin - (GAMERS EDGE)
\r
1665 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1666 Quit("CA_CacheMap(): Can't find level files.");
\r
1672 // free up memory from last map
\r
1674 if (mapon>-1 && mapheaderseg[mapon])
\r
1675 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1676 for (plane=0;plane<MAPPLANES;plane++)
\r
1677 if (mapsegs[plane])
\r
1678 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1684 // load map header
\r
1685 // The header will be cached if it is still around
\r
1687 if (!mapheaderseg[mapnum])
\r
1689 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1690 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1691 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1693 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1694 lseek(maphandle,pos,SEEK_SET);
\r
1695 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1698 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1701 // load the planes in
\r
1702 // If a plane's pointer still exists it will be overwritten (levels are
\r
1703 // allways reloaded, never cached)
\r
1706 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1708 for (plane = 0; plane<MAPPLANES; plane++)
\r
1710 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1711 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1714 continue; // the plane is not used in this game
\r
1716 dest = &(memptr)mapsegs[plane];
\r
1717 MM_GetPtr(dest,size);
\r
1719 lseek(maphandle,pos,SEEK_SET);
\r
1720 if (compressed<=BUFFERSIZE)
\r
1721 source = bufferseg;
\r
1724 MM_GetPtr(&bigbufferseg,compressed);
\r
1725 MM_SetLock (&bigbufferseg,true);
\r
1726 source = bigbufferseg;
\r
1729 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1730 #ifdef MAPHEADERLINKED
\r
1732 // unhuffman, then unRLEW
\r
1733 // The huffman'd chunk has a two byte expanded length first
\r
1734 // The resulting RLEW chunk also does, even though it's not really
\r
1737 expanded = *source;
\r
1739 MM_GetPtr (&buffer2seg,expanded);
\r
1740 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1741 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1742 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1743 MM_FreePtr (&buffer2seg);
\r
1747 // unRLEW, skipping expanded length
\r
1749 CA_RLEWexpand (source+1, *dest,size,
\r
1750 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1753 if (compressed>BUFFERSIZE)
\r
1754 MM_FreePtr(&bigbufferseg);
\r
1758 //===========================================================================
\r
1761 ======================
\r
1765 = Goes up a bit level in the needed lists and clears it out.
\r
1766 = Everything is made purgable
\r
1768 ======================
\r
1771 void CA_UpLevel (void)
\r
1773 if (ca_levelnum==7)
\r
1774 Quit ("CA_UpLevel: Up past level 7!");
\r
1780 //===========================================================================
\r
1783 ======================
\r
1787 = Goes down a bit level in the needed lists and recaches
\r
1788 = everything from the lower level
\r
1790 ======================
\r
1793 void CA_DownLevel (void)
\r
1796 Quit ("CA_DownLevel: Down past level 0!");
\r
1799 CA_CacheMarks(NULL);
\r
1802 //===========================================================================
\r
1805 ======================
\r
1809 = Clears out all the marks at the current level
\r
1811 ======================
\r
1814 void CA_ClearMarks (void)
\r
1818 for (i=0;i<NUMCHUNKS;i++)
\r
1819 grneeded[i]&=~ca_levelbit;
\r
1823 //===========================================================================
\r
1826 ======================
\r
1828 = CA_ClearAllMarks
\r
1830 = Clears out all the marks on all the levels
\r
1832 ======================
\r
1835 void CA_ClearAllMarks (void)
\r
1837 _fmemset (grneeded,0,sizeof(grneeded));
\r
1843 //===========================================================================
\r
1846 ======================
\r
1850 ======================
\r
1853 void CA_FreeGraphics (void)
\r
1857 for (i=0;i<NUMCHUNKS;i++)
\r
1859 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1864 ======================
\r
1868 = Make everything possible purgable
\r
1870 ======================
\r
1873 void CA_SetAllPurge (void)
\r
1880 // free cursor sprite and background save
\r
1885 // free map headers and map planes
\r
1887 for (i=0;i<NUMMAPS;i++)
\r
1888 if (mapheaderseg[i])
\r
1889 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
1893 MM_FreePtr (&(memptr)mapsegs[i]);
\r
1898 for (i=0;i<NUMSNDCHUNKS;i++)
\r
1900 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
1905 CA_FreeGraphics ();
\r
1909 void CA_SetGrPurge (void)
\r
1916 for (i=0;i<NUMCHUNKS;i++)
\r
1918 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1922 //===========================================================================
\r
1926 ======================
\r
1930 ======================
\r
1933 #define NUMBARS (17l*8)
\r
1936 unsigned thx,thy,lastx;
\r
1937 long barx,barstep;
\r
1939 void CAL_DialogDraw (char *title,unsigned numcache)
\r
1941 unsigned homex,homey,x;
\r
1943 barstep = (NUMBARS<<16)/numcache;
\r
1946 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
1948 US_CenterWindow (20,8);
\r
1952 US_CPrint ("Loading");
\r
1953 fontcolor = F_SECONDCOLOR;
\r
1954 US_CPrint (title);
\r
1955 fontcolor = F_BLACK;
\r
1958 // draw thermometer bar
\r
1962 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
1963 VWB_DrawTile8(thx,thy+8,3);
\r
1964 VWB_DrawTile8(thx,thy+16,6);
\r
1965 VWB_DrawTile8(thx+17*8,thy,2);
\r
1966 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
1967 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
1968 for (x=thx+8;x<thx+17*8;x+=8)
\r
1970 VWB_DrawTile8(x,thy,1);
\r
1971 VWB_DrawTile8(x,thy+8,4);
\r
1972 VWB_DrawTile8(x,thy+16,7);
\r
1975 thx += 4; // first line location
\r
1977 barx = (long)thx<<16;
\r
1980 VW_UpdateScreen();
\r
1985 ======================
\r
1987 = CAL_DialogUpdate
\r
1989 ======================
\r
1992 void CAL_DialogUpdate (void)
\r
1998 if (xh - lastx > BARSTEP)
\r
2000 for (x=lastx;x<=xh;x++)
\r
2001 #if GRMODE == EGAGR
\r
2002 VWB_Vlin (thy,thy+13,x,14);
\r
2004 #if GRMODE == CGAGR
\r
2005 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2008 VW_UpdateScreen();
\r
2013 ======================
\r
2015 = CAL_DialogFinish
\r
2017 ======================
\r
2020 void CAL_DialogFinish (void)
\r
2024 xh = thx + NUMBARS;
\r
2025 for (x=lastx;x<=xh;x++)
\r
2026 #if GRMODE == EGAGR
\r
2027 VWB_Vlin (thy,thy+13,x,14);
\r
2029 #if GRMODE == CGAGR
\r
2030 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2032 VW_UpdateScreen();
\r
2036 //===========================================================================
\r
2039 ======================
\r
2043 ======================
\r
2045 #define MAXEMPTYREAD 1024
\r
2047 void CA_CacheMarks (char *title)
\r
2050 int i,next,numcache;
\r
2051 long pos,endpos,nextpos,nextendpos,compressed;
\r
2052 long bufferstart,bufferend; // file position of general buffer
\r
2054 memptr bigbufferseg;
\r
2056 dialog = (title!=NULL);
\r
2060 // go through and make everything not needed purgable
\r
2062 for (i=0;i<NUMCHUNKS;i++)
\r
2063 if (grneeded[i]&ca_levelbit)
\r
2065 if (grsegs[i]) // its allready in memory, make
\r
2066 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2072 if (grsegs[i]) // not needed, so make it purgeable
\r
2073 MM_SetPurge(&grsegs[i],3);
\r
2076 if (!numcache) // nothing to cache!
\r
2079 // MDM begin - (GAMERS EDGE)
\r
2081 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2082 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2089 write(profilehandle,title,strlen(title));
\r
2090 write(profilehandle,"\n",1);
\r
2093 drawcachebox(title,numcache);
\r
2097 // go through and load in anything still needed
\r
2099 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2101 for (i=0;i<NUMCHUNKS;i++)
\r
2102 if ( (grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2105 // update thermometer
\r
2107 if (dialog && updatecachebox)
\r
2108 updatecachebox ();
\r
2110 pos = GRFILEPOS(i);
\r
2115 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2118 compressed = GRFILEPOS(next)-pos;
\r
2119 endpos = pos+compressed;
\r
2121 if (compressed<=BUFFERSIZE)
\r
2123 if (bufferstart<=pos
\r
2124 && bufferend>= endpos)
\r
2126 // data is allready in buffer
\r
2127 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2131 // load buffer with a new block from disk
\r
2132 // try to get as many of the needed blocks in as possible
\r
2133 while ( next < NUMCHUNKS )
\r
2135 while (next < NUMCHUNKS &&
\r
2136 !(grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2138 if (next == NUMCHUNKS)
\r
2141 nextpos = GRFILEPOS(next);
\r
2142 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2144 nextendpos = GRFILEPOS(next);
\r
2145 if (nextpos - endpos <= MAXEMPTYREAD
\r
2146 && nextendpos-pos <= BUFFERSIZE)
\r
2147 endpos = nextendpos;
\r
2149 next = NUMCHUNKS; // read pos to posend
\r
2152 lseek(grhandle,pos,SEEK_SET);
\r
2153 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2154 bufferstart = pos;
\r
2155 bufferend = endpos;
\r
2156 source = bufferseg;
\r
2161 // big chunk, allocate temporary buffer
\r
2162 MM_GetPtr(&bigbufferseg,compressed);
\r
2165 MM_SetLock (&bigbufferseg,true);
\r
2166 lseek(grhandle,pos,SEEK_SET);
\r
2167 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2168 source = bigbufferseg;
\r
2171 CAL_ExpandGrChunk (i,source);
\r
2175 if (compressed>BUFFERSIZE)
\r
2176 MM_FreePtr(&bigbufferseg);
\r
2181 // finish up any thermometer remnants
\r
2183 if (dialog && finishcachebox)
\r