1 /* Catacomb Apocalypse Source Code
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2 * Copyright (C) 1993-2014 Flat Rock Software
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; either version 2 of the License, or
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7 * (at your option) any later version.
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9 * This program is distributed in the hope that it will be useful,
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 * GNU General Public License for more details.
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14 * You should have received a copy of the GNU General Public License along
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15 * with this program; if not, write to the Free Software Foundation, Inc.,
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16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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22 =============================================================================
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24 Id Software Caching Manager
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25 ---------------------------
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27 Must be started BEFORE the memory manager, because it needs to get the headers
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28 loaded into the data segment
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30 =============================================================================
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33 #include "src/lib/16_ca.h"
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39 //#define THREEBYTEGRSTARTS
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42 =============================================================================
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46 =============================================================================
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51 word bit0,bit1; // 0-255 is a character, > is a pointer to a node
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58 long headeroffsets[100];
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64 =============================================================================
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68 =============================================================================
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74 unsigned _seg *mapsegs[3];
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75 maptype _seg *mapheaderseg[NUMMAPS];
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76 byte _seg *audiosegs[NUMSNDCHUNKS];
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77 void _seg *grsegs[NUMCHUNKS];
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79 byte far grneeded[NUMCHUNKS];*/
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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(global_game_variables_t *gvar)
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178 #ifdef __BORLANDC__
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179 unlink("debug.16b");
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180 gvar->handle.debughandle = open("debug.16b", O_CREAT | O_WRONLY | O_TEXT);
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183 unlink("debug.16w");
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184 gvar->handle.debughandle = open("debug.16w", O_CREAT | O_WRONLY | O_TEXT);
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188 void CA_CloseDebug(global_game_variables_t *gvar)
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190 close(gvar->handle.debughandle);
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196 ============================
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198 = CAL_GetGrChunkLength
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200 = Gets the length of an explicit length chunk (not tiles)
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201 = The file pointer is positioned so the compressed data can be read in next.
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203 ============================
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206 void CAL_GetGrChunkLength (int chunk)
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208 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
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209 read(grhandle,&chunkexplen,sizeof(chunkexplen));
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210 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
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215 ==========================
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219 = Read from a file to a far pointer
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221 ==========================
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224 boolean CA_FarRead(int handle, byte huge *dest, dword length, mminfo_t *mm)
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229 if(mm->EMSVer<0x40)
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230 if(length>0xfffflu)
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232 printf("File is a fat bakapee\n");
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233 //segm=(length%0xfffflu)-1;
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234 //fat=segm*0xfffflu;
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236 printf("CA_FarRead doesn't support 64K reads yet!\n");
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237 return 0;//TODO: EXPAND!!!
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245 mov cx,[WORD PTR length]
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246 mov dx,[WORD PTR dest]
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247 mov ds,[WORD PTR dest+2]
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248 mov ah,0x3f // READ w/handle
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255 #ifdef __BORLANDC__
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259 #ifdef __BORLANDC__
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262 cmp ax,[WORD PTR length]
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264 // errno = EINVFMT; // user manager knows this is bad read
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267 #ifdef __BORLANDC__
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271 #ifdef __BORLANDC__
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275 #ifdef __BORLANDC__
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287 ==========================
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291 = Write from a file to a far pointer
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293 ==========================
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296 boolean CA_FarWrite(int handle, byte huge *source, dword length, mminfo_t *mm)
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301 if(mm->EMSVer<0x40)
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302 if(length>0xfffflu)
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304 printf("File is a fat bakapee\n");
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305 //segm=(length%0xfffflu)-1;
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306 //fat=segm*0xfffflu;
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308 printf("CA_FarRead doesn't support 64K reads yet!\n");
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317 mov cx,[WORD PTR length]
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318 mov dx,[WORD PTR source]
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319 mov ds,[WORD PTR source+2]
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320 mov ah,0x40 // WRITE w/handle
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327 #ifdef __BORLANDC__
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331 #ifdef __BORLANDC__
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334 cmp ax,[WORD PTR length]
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336 //errno = ENOMEM; // user manager knows this is bad write
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339 #ifdef __BORLANDC__
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343 #ifdef __BORLANDC__
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347 #ifdef __BORLANDC__
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359 ==========================
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363 = Reads a file into an allready allocated buffer
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365 ==========================
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368 boolean CA_ReadFile(char *filename, memptr *ptr, mminfo_t *mm)
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374 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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377 size = filelength(handle);
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378 if(!CA_FarRead(handle,*ptr,size, mm))
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389 ==========================
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393 = Writes a file from a memory buffer
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395 ==========================
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398 boolean CA_WriteFile (char *filename, void far *ptr, long length, mminfo_t *mm)
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404 handle = open(filename,O_CREAT | O_BINARY | O_WRONLY,
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405 S_IREAD | S_IWRITE | S_IFREG);
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410 if (!CA_FarWrite (handle,ptr,length, mm))
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422 ==========================
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426 = Allocate space for and load a file
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428 ==========================
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431 boolean CA_LoadFile(char *filename, memptr *ptr, mminfo_t *mm, mminfotype *mmi)
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437 if((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
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440 size = filelength (handle);
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441 MM_GetPtr(ptr,size, mm, mmi);
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442 if(!CA_FarRead(handle,*ptr,size, mm))
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452 ============================================================================
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454 COMPRESSION routines, see JHUFF.C for more
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456 ============================================================================
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464 = CAL_OptimizeNodes
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466 = Goes through a huffman table and changes the 256-511 node numbers to the
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467 = actular address of the node. Must be called before CAL_HuffExpand
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472 void CAL_OptimizeNodes(huffnode *table)
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479 for (i=0;i<255;i++)
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481 if (node->bit0 >= 256)
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482 node->bit0 = (unsigned)(table+(node->bit0-256));
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483 if (node->bit1 >= 256)
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484 node->bit1 = (unsigned)(table+(node->bit1-256));
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492 ======================
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496 = Length is the length of the EXPANDED data
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498 ======================
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501 void CAL_HuffExpand (byte huge *source, byte huge *dest,
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502 long length,huffnode *hufftable)
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504 // unsigned bit,byte,node,code;
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505 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
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507 // huffnode *nodeon;
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509 headptr = hufftable+254; // head node is allways node 254
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511 source++; // normalize
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516 sourceseg = FP_SEG(source);
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517 sourceoff = FP_OFF(source);
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518 destseg = FP_SEG(dest);
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519 destoff = FP_OFF(dest);
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520 endoff = destoff+length;
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525 // ss:bx node pointer
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528 if (length <0xfff0)
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531 //--------------------------
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532 // expand less than 64k of data
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533 //--------------------------
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536 //// mov bx,[headptr]
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544 mov ch,[si] // load first byte
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547 #ifdef __BORLANDC__
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551 #ifdef __BORLANDC__
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554 test ch,cl // bit set?
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556 mov dx,[ss:bx] // take bit0 path from node
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557 shl cl,1 // advance to next bit position
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560 #ifdef __BORLANDC__
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564 #ifdef __BORLANDC__
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567 mov dx,[ss:bx+2] // take bit1 path
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568 shl cl,1 // advance to next bit position
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570 #ifdef __BORLANDC__
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574 #ifdef __BORLANDC__
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577 mov ch,[si] // load next byte
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579 mov cl,1 // back to first bit
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580 #ifdef __BORLANDC__
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584 #ifdef __BORLANDC__
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587 or dh,dh // if dx<256 its a byte, else move node
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589 mov bx,dx // next node = (huffnode *)code
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591 #ifdef __BORLANDC__
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595 #ifdef __BORLANDC__
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599 inc di // write a decopmpressed byte out
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600 //// mov bx,[headptr] // back to the head node for next bit
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609 //--------------------------
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610 // expand more than 64k of data
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611 //--------------------------
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616 //// mov bx,[headptr]
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624 lodsb // load first byte
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625 #ifdef __BORLANDC__
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629 #ifdef __BORLANDC__
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632 test al,cl // bit set?
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634 mov dx,[ss:bx] // take bit0 path from node
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636 #ifdef __BORLANDC__
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640 #ifdef __BORLANDC__
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643 mov dx,[ss:bx+2] // take bit1 path
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644 #ifdef __BORLANDC__
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648 #ifdef __BORLANDC__
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651 shl cl,1 // advance to next bit position
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654 cmp si,0x10 // normalize ds:si
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660 #ifdef __BORLANDC__
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664 #ifdef __BORLANDC__
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667 mov cl,1 // back to first bit
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668 #ifdef __BORLANDC__
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672 #ifdef __BORLANDC__
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675 or dh,dh // if dx<256 its a byte, else move node
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677 mov bx,dx // next node = (huffnode *)code
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679 #ifdef __BORLANDC__
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683 #ifdef __BORLANDC__
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687 inc di // write a decopmpressed byte out
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688 //// mov bx,[headptr] // back to the head node for next bit
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690 cmp di,0x10 // normalize es:di
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696 #ifdef __BORLANDC__
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700 #ifdef __BORLANDC__
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703 sub [WORD PTR ss:length],1
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705 dec [WORD PTR ss:length+2]
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706 jns expand // when length = ffff ffff, done
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719 ======================
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721 = CAL_CarmackExpand
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723 = Length is the length of the EXPANDED data
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725 ======================
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728 #define NEARTAG 0xa7
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729 #define FARTAG 0xa8
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731 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
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733 unsigned ch,chhigh,count,offset;
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734 unsigned far *copyptr, far *inptr, far *outptr;
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745 if (chhigh == NEARTAG)
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749 { // have to insert a word containing the tag byte
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750 ch |= *((unsigned char far *)inptr)++;
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756 offset = *((unsigned char far *)inptr)++;
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757 copyptr = outptr - offset;
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760 *outptr++ = *copyptr++;
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763 else if (chhigh == FARTAG)
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767 { // have to insert a word containing the tag byte
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768 ch |= *((unsigned char far *)inptr)++;
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775 copyptr = dest + offset;
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778 *outptr++ = *copyptr++;
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792 ======================
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796 ======================
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799 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
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803 unsigned value,count,i;
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804 unsigned huge *start,huge *end;
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808 end = source + (length+1)/2;
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817 while (*source == value && source<end)
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822 if (count>3 || value == rlewtag)
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825 // send a tag / count / value string
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834 // send word without compressing
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836 for (i=1;i<=count;i++)
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840 } while (source<end);
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842 complength = 2*(dest-start);
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848 ======================
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851 = length is EXPANDED length
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853 ======================
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856 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
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859 // unsigned value,count,i;
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860 unsigned huge *end;
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861 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
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871 if (value != rlewtag)
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879 // compressed string
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883 for (i=1;i<=count;i++)
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886 } while (dest<end);
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889 end = dest + (length)/2;
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890 sourceseg = FP_SEG(source);
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891 sourceoff = FP_OFF(source);
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892 destseg = FP_SEG(dest);
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893 destoff = FP_OFF(dest);
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894 endseg = FP_SEG(end);
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895 endoff = FP_OFF(end);
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899 // ax = source value
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901 // cx = repeat counts
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904 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
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908 asm mov si,sourceoff
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911 asm mov ds,sourceseg
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922 asm mov cx,ax // repeat count
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923 asm lodsw // repeat value
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928 asm cmp si,0x10 // normalize ds:si
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940 asm cmp di,0x10 // normalize es:di
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953 asm cmp di,ss:endoff
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956 asm cmp ax,ss:endseg
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967 =============================================================================
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969 CACHE MANAGER ROUTINES
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971 =============================================================================
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975 ======================
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979 ======================
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982 /*void CAL_SetupGrFile (void)
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987 #ifdef GRHEADERLINKED
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989 #if GRMODE == EGAGR
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990 grhuffman = (huffnode *)&EGAdict;
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991 grstarts = (long _seg *)FP_SEG(&EGAhead);
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993 #if GRMODE == CGAGR
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994 grhuffman = (huffnode *)&CGAdict;
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995 grstarts = (long _seg *)FP_SEG(&CGAhead);
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998 CAL_OptimizeNodes (grhuffman);
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1003 // load ???dict.ext (huffman dictionary for graphics files)
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1006 if ((handle = open(GREXT"DICT."EXT,
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1007 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1008 Quit ("Can't open "GREXT"DICT."EXT"!");
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1010 read(handle, &grhuffman, sizeof(grhuffman));
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1012 CAL_OptimizeNodes (grhuffman);
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1014 // load the data offsets from ???head.ext
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1016 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
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1018 if ((handle = open(GREXT"HEAD."EXT,
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1019 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1020 Quit ("Can't open "GREXT"HEAD."EXT"!");
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1022 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
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1030 // Open the graphics file, leaving it open until the game is finished
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1032 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
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1033 if (grhandle == -1)
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1034 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
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1038 // load the pic and sprite headers into the arrays in the data segment
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1041 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
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1042 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
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1043 MM_GetPtr(&compseg,chunkcomplen);
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1044 CA_FarRead (grhandle,compseg,chunkcomplen);
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1045 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
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1046 MM_FreePtr(&compseg);
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1050 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
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1051 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
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1052 MM_GetPtr(&compseg,chunkcomplen);
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1053 CA_FarRead (grhandle,compseg,chunkcomplen);
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1054 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
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1055 MM_FreePtr(&compseg);
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1059 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
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1060 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
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1061 MM_GetPtr(&compseg,chunkcomplen);
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1062 CA_FarRead (grhandle,compseg,chunkcomplen);
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1063 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
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1064 MM_FreePtr(&compseg);
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1069 //==========================================================================
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1073 ======================
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1075 = CAL_SetupMapFile
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1077 ======================
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1080 /*void CAL_SetupMapFile (void)
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1086 // load maphead.ext (offsets and tileinfo for map file)
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1088 #ifndef MAPHEADERLINKED
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1089 if ((handle = open("MAPHEAD."EXT,
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1090 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1091 Quit ("Can't open MAPHEAD."EXT"!");
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1092 length = filelength(handle);
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1093 MM_GetPtr (&(memptr)tinf,length);
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1094 CA_FarRead(handle, tinf, length);
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1098 tinf = (byte _seg *)FP_SEG(&maphead);
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1103 // open the data file
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1105 #ifdef MAPHEADERLINKED
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1106 if ((maphandle = open("GAMEMAPS."EXT,
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1107 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1108 Quit ("Can't open GAMEMAPS."EXT"!");
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1110 if ((maphandle = open("MAPTEMP."EXT,
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1111 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1112 Quit ("Can't open MAPTEMP."EXT"!");
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1116 //==========================================================================
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1120 ======================
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1122 = CAL_SetupAudioFile
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1124 ======================
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1127 /*void CAL_SetupAudioFile (void)
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1133 // load maphead.ext (offsets and tileinfo for map file)
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1135 #ifndef AUDIOHEADERLINKED
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1136 if ((handle = open("AUDIOHED."EXT,
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1137 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1138 Quit ("Can't open AUDIOHED."EXT"!");
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1139 length = filelength(handle);
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1140 MM_GetPtr (&(memptr)audiostarts,length);
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1141 CA_FarRead(handle, (byte far *)audiostarts, length);
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1144 audiohuffman = (huffnode *)&audiodict;
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1145 CAL_OptimizeNodes (audiohuffman);
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1146 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1150 // open the data file
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1152 #ifndef AUDIOHEADERLINKED
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1153 if ((audiohandle = open("AUDIOT."EXT,
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1154 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1155 Quit ("Can't open AUDIOT."EXT"!");
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1157 if ((audiohandle = open("AUDIO."EXT,
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1158 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1159 Quit ("Can't open AUDIO."EXT"!");
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1163 //==========================================================================
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1167 ======================
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1171 = Open all files and load in headers
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1173 ======================
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1176 void CA_Startup(global_game_variables_t *gvar)
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1179 #ifdef __BORLANDC__
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1180 unlink("profile.16b");
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1181 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
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1183 #ifdef __WATCOMC__
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1184 unlink("profile.16w");
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1185 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
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1189 #ifdef __BORLANDC__
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1190 unlink("meminfo.16b");
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1191 gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);
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1193 #ifdef __WATCOMC__
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1194 unlink("meminfo.16w");
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1195 gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);
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1197 /* CAL_SetupMapFile ();
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1198 CAL_SetupGrFile ();
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1199 CAL_SetupAudioFile ();*/
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1201 // MDM begin - (GAMERS EDGE)
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1203 if(!FindFile("AUDIO."EXT,NULL,2))
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1204 Quit("CA_Startup(): Can't find audio files.");
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1209 CAL_SetupAudioFile();
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1212 // MDM begin - (GAMERS EDGE)
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1214 if (!FindFile("GAMEMAPS."EXT,NULL,1))
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1215 Quit("CA_Startup(): Can't find level files.");
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1220 CAL_SetupMapFile ();
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1223 // MDM begin - (GAMERS EDGE)
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1225 if (!FindFile("EGAGRAPH."EXT,NULL,2))
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1226 Quit("CA_Startup(): Can't find graphics files.");
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1230 #ifndef NOGRAPHICS
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1231 CAL_SetupGrFile ();
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1234 gvar->ca.mapon = -1;
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1235 gvar->ca.ca_levelbit = 1;
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1236 gvar->ca.ca_levelnum = 0;
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1238 /* drawcachebox = CAL_DialogDraw;
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1239 updatecachebox = CAL_DialogUpdate;
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1240 finishcachebox = CAL_DialogFinish;*/
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1243 //==========================================================================
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1247 ======================
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1251 = Closes all files
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1253 ======================
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1256 void CA_Shutdown(global_game_variables_t *gvar)
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1259 close(gvar->handle.profilehandle);
\r
1261 close(gvar->handle.showmemhandle);
\r
1265 close(audiohandle);*/
\r
1268 //===========================================================================
\r
1271 ======================
\r
1273 = CA_CacheAudioChunk
\r
1275 ======================
\r
1278 void CA_CacheAudioChunk (int chunk)
\r
1280 long pos,compressed;
\r
1281 #ifdef AUDIOHEADERLINKED
\r
1283 memptr bigbufferseg;
\r
1287 if (audiosegs[chunk])
\r
1289 MM_SetPurge (&(memptr)audiosegs[chunk],0);
\r
1290 return; // allready in memory
\r
1293 // MDM begin - (GAMERS EDGE)
\r
1295 if (!FindFile("AUDIO."EXT,NULL,2))
\r
1296 Quit("CA_CacheAudioChunk(): Can't find audio files.");
\r
1301 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1302 // a larger buffer
\r
1304 pos = audiostarts[chunk];
\r
1305 compressed = audiostarts[chunk+1]-pos;
\r
1307 lseek(audiohandle,pos,SEEK_SET);
\r
1309 #ifndef AUDIOHEADERLINKED
\r
1311 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
\r
1315 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1319 if (compressed<=BUFFERSIZE)
\r
1321 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1322 source = bufferseg;
\r
1326 MM_GetPtr(&bigbufferseg,compressed);
\r
1329 MM_SetLock (&bigbufferseg,true);
\r
1330 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1331 source = bigbufferseg;
\r
1334 expanded = *(long far *)source;
\r
1335 source += 4; // skip over length
\r
1336 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
\r
1339 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1342 if (compressed>BUFFERSIZE)
\r
1343 MM_FreePtr(&bigbufferseg);
\r
1347 //===========================================================================
\r
1350 ======================
\r
1352 = CA_LoadAllSounds
\r
1354 = Purges all sounds, then loads all new ones (mode switch)
\r
1356 ======================
\r
1359 void CA_LoadAllSounds (void)
\r
1363 switch (oldsoundmode)
\r
1368 start = STARTPCSOUNDS;
\r
1371 start = STARTADLIBSOUNDS;
\r
1375 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1376 if (audiosegs[start])
\r
1377 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
\r
1381 switch (SoundMode)
\r
1386 start = STARTPCSOUNDS;
\r
1389 start = STARTADLIBSOUNDS;
\r
1393 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1394 CA_CacheAudioChunk (start);
\r
1396 oldsoundmode = SoundMode;
\r
1399 //===========================================================================
\r
1401 //++++#if GRMODE == EGAGR
\r
1404 ======================
\r
1408 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1410 ======================
\r
1413 unsigned static sheight,swidth;
\r
1414 boolean static dothemask;
\r
1416 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1417 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1420 sheight = height; // because we are going to reassign bp
\r
1422 dothemask = domask;
\r
1424 asm mov ax,[segment]
\r
1425 asm mov ds,ax // source and dest are in same segment, and all local
\r
1427 asm mov bx,[source]
\r
1430 asm mov bp,[pixshift]
\r
1432 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1434 asm cmp [ss:dothemask],0
\r
1438 // table shift the mask
\r
1440 asm mov dx,[ss:sheight]
\r
1444 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1445 asm mov cx,ss:[swidth]
\r
1449 asm mov al,[bx] // source
\r
1451 asm inc bx // next source byte
\r
1455 asm mov ax,[bp+si] // table shift into two bytes
\r
1457 asm and [di],al // and with first byte
\r
1459 asm mov [di],ah // replace next byte
\r
1461 asm loop domaskbyte
\r
1463 asm inc di // the last shifted byte has 1s in it
\r
1470 // table shift the data
\r
1472 asm mov dx,ss:[sheight]
\r
1474 asm shl dx,1 // four planes of data
\r
1478 asm mov BYTE PTR [di],0 // 0 first byte
\r
1479 asm mov cx,ss:[swidth]
\r
1483 asm mov al,[bx] // source
\r
1484 asm inc bx // next source byte
\r
1488 asm mov ax,[bp+si] // table shift into two bytes
\r
1489 asm or [di],al // or with first byte
\r
1491 asm mov [di],ah // replace next byte
\r
1493 asm loop dodatabyte
\r
1495 asm inc di // the last shifted byte has 0s in it
\r
1503 asm mov ax,ss // restore data segment
\r
1510 //===========================================================================
\r
1513 ======================
\r
1517 = Generate shifts and set up sprite structure for a given sprite
\r
1519 ======================
\r
1522 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1525 unsigned shiftstarts[5];
\r
1526 unsigned smallplane,bigplane,expanded;
\r
1527 spritetabletype far *spr;
\r
1528 spritetype _seg *dest;
\r
1530 #if GRMODE == CGAGR
\r
1532 // CGA has no pel panning, so shifts are never needed
\r
1534 spr = &spritetable[chunk-STARTSPRITES];
\r
1535 smallplane = spr->width*spr->height;
\r
1536 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1539 dest = (spritetype _seg *)grsegs[chunk];
\r
1540 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1541 dest->planesize[0] = smallplane;
\r
1542 dest->width[0] = spr->width;
\r
1545 // expand the unshifted shape
\r
1547 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1552 #if GRMODE == EGAGR
\r
1555 // calculate sizes
\r
1557 spr = &spritetable[chunk-STARTSPRITES];
\r
1558 smallplane = spr->width*spr->height;
\r
1559 bigplane = (spr->width+1)*spr->height;
\r
1561 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1562 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1563 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1564 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1565 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1567 expanded = shiftstarts[spr->shifts];
\r
1568 MM_GetPtr (&grsegs[chunk],expanded);
\r
1571 dest = (spritetype _seg *)grsegs[chunk];
\r
1574 // expand the unshifted shape
\r
1576 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1579 // make the shifts!
\r
1581 switch (spr->shifts)
\r
1586 dest->sourceoffset[i] = shiftstarts[0];
\r
1587 dest->planesize[i] = smallplane;
\r
1588 dest->width[i] = spr->width;
\r
1595 dest->sourceoffset[i] = shiftstarts[0];
\r
1596 dest->planesize[i] = smallplane;
\r
1597 dest->width[i] = spr->width;
\r
1601 dest->sourceoffset[i] = shiftstarts[1];
\r
1602 dest->planesize[i] = bigplane;
\r
1603 dest->width[i] = spr->width+1;
\r
1605 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1606 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1610 dest->sourceoffset[0] = shiftstarts[0];
\r
1611 dest->planesize[0] = smallplane;
\r
1612 dest->width[0] = spr->width;
\r
1614 dest->sourceoffset[1] = shiftstarts[1];
\r
1615 dest->planesize[1] = bigplane;
\r
1616 dest->width[1] = spr->width+1;
\r
1617 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1618 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1620 dest->sourceoffset[2] = shiftstarts[2];
\r
1621 dest->planesize[2] = bigplane;
\r
1622 dest->width[2] = spr->width+1;
\r
1623 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1624 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1626 dest->sourceoffset[3] = shiftstarts[3];
\r
1627 dest->planesize[3] = bigplane;
\r
1628 dest->width[3] = spr->width+1;
\r
1629 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1630 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1635 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1641 //===========================================================================
\r
1645 ======================
\r
1647 = CAL_ExpandGrChunk
\r
1649 = Does whatever is needed with a pointer to a compressed chunk
\r
1651 ======================
\r
1654 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1659 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1662 // expanded sizes of tile8/16/32 are implicit
\r
1665 #if GRMODE == EGAGR
\r
1667 #define MASKBLOCK 40
\r
1670 #if GRMODE == CGAGR
\r
1672 #define MASKBLOCK 32
\r
1675 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1676 expanded = BLOCK*NUMTILE8;
\r
1677 else if (chunk<STARTTILE16)
\r
1678 expanded = MASKBLOCK*NUMTILE8M;
\r
1679 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1680 expanded = BLOCK*4;
\r
1681 else if (chunk<STARTTILE32)
\r
1682 expanded = MASKBLOCK*4;
\r
1683 else if (chunk<STARTTILE32M)
\r
1684 expanded = BLOCK*16;
\r
1686 expanded = MASKBLOCK*16;
\r
1691 // everything else has an explicit size longword
\r
1693 expanded = *(long far *)source;
\r
1694 source += 4; // skip over length
\r
1698 // allocate final space, decompress it, and free bigbuffer
\r
1699 // Sprites need to have shifts made and various other junk
\r
1701 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1702 CAL_CacheSprite(chunk,source);
\r
1705 MM_GetPtr (&grsegs[chunk],expanded);
\r
1708 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1714 ======================
\r
1718 = Gets a chunk off disk, optimizing reads to general buffer
\r
1720 ======================
\r
1723 void CAL_ReadGrChunk (int chunk)
\r
1725 long pos,compressed;
\r
1726 memptr bigbufferseg;
\r
1731 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1732 // a larger buffer
\r
1734 pos = GRFILEPOS(chunk);
\r
1735 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1739 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1742 compressed = GRFILEPOS(next)-pos;
\r
1744 lseek(grhandle,pos,SEEK_SET);
\r
1746 if (compressed<=BUFFERSIZE)
\r
1748 CA_FarRead(grhandle,bufferseg,compressed);
\r
1749 source = bufferseg;
\r
1753 MM_GetPtr(&bigbufferseg,compressed);
\r
1756 MM_SetLock (&bigbufferseg,true);
\r
1757 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1758 source = bigbufferseg;
\r
1761 CAL_ExpandGrChunk (chunk,source);
\r
1763 if (compressed>BUFFERSIZE)
\r
1764 MM_FreePtr(&bigbufferseg);
\r
1768 ======================
\r
1772 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1774 ======================
\r
1777 void CA_CacheGrChunk (int chunk)
\r
1779 long pos,compressed;
\r
1780 memptr bigbufferseg;
\r
1784 gvar->video.grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1785 if (grsegs[chunk])
\r
1787 MM_SetPurge (&grsegs[chunk],0);
\r
1788 return; // allready in memory
\r
1791 // MDM begin - (GAMERS EDGE)
\r
1793 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1794 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1799 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1800 // a larger buffer
\r
1802 pos = GRFILEPOS(chunk);
\r
1803 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1807 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1810 compressed = GRFILEPOS(next)-pos;
\r
1812 lseek(grhandle,pos,SEEK_SET);
\r
1814 if (compressed<=BUFFERSIZE)
\r
1816 CA_FarRead(grhandle,bufferseg,compressed);
\r
1817 source = bufferseg;
\r
1821 MM_GetPtr(&bigbufferseg,compressed);
\r
1822 MM_SetLock (&bigbufferseg,true);
\r
1823 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1824 source = bigbufferseg;
\r
1827 CAL_ExpandGrChunk (chunk,source);
\r
1829 if (compressed>BUFFERSIZE)
\r
1830 MM_FreePtr(&bigbufferseg);
\r
1835 //==========================================================================
\r
1838 ======================
\r
1842 ======================
\r
1845 void CA_CacheMap (int mapnum)
\r
1847 long pos,compressed;
\r
1849 memptr *dest,bigbufferseg;
\r
1851 unsigned far *source;
\r
1852 #ifdef MAPHEADERLINKED
\r
1853 memptr buffer2seg;
\r
1858 // MDM begin - (GAMERS EDGE)
\r
1860 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1861 Quit("CA_CacheMap(): Can't find level files.");
\r
1867 // free up memory from last map
\r
1869 if (mapon>-1 && mapheaderseg[mapon])
\r
1870 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1871 for (plane=0;plane<MAPPLANES;plane++)
\r
1872 if (mapsegs[plane])
\r
1873 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1879 // load map header
\r
1880 // The header will be cached if it is still around
\r
1882 if (!mapheaderseg[mapnum])
\r
1884 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1885 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1886 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1888 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1889 lseek(maphandle,pos,SEEK_SET);
\r
1890 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1893 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1896 // load the planes in
\r
1897 // If a plane's pointer still exists it will be overwritten (levels are
\r
1898 // allways reloaded, never cached)
\r
1901 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1903 for (plane = 0; plane<MAPPLANES; plane++)
\r
1905 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1906 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1909 continue; // the plane is not used in this game
\r
1911 dest = &(memptr)mapsegs[plane];
\r
1912 MM_GetPtr(dest,size);
\r
1914 lseek(maphandle,pos,SEEK_SET);
\r
1915 if (compressed<=BUFFERSIZE)
\r
1916 source = bufferseg;
\r
1919 MM_GetPtr(&bigbufferseg,compressed);
\r
1920 MM_SetLock (&bigbufferseg,true);
\r
1921 source = bigbufferseg;
\r
1924 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1925 #ifdef MAPHEADERLINKED
\r
1927 // unhuffman, then unRLEW
\r
1928 // The huffman'd chunk has a two byte expanded length first
\r
1929 // The resulting RLEW chunk also does, even though it's not really
\r
1932 expanded = *source;
\r
1934 MM_GetPtr (&buffer2seg,expanded);
\r
1935 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1936 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1937 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1938 MM_FreePtr (&buffer2seg);
\r
1942 // unRLEW, skipping expanded length
\r
1944 CA_RLEWexpand (source+1, *dest,size,
\r
1945 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1948 if (compressed>BUFFERSIZE)
\r
1949 MM_FreePtr(&bigbufferseg);
\r
1953 //===========================================================================
\r
1956 ======================
\r
1960 = Goes up a bit level in the needed lists and clears it out.
\r
1961 = Everything is made purgable
\r
1963 ======================
\r
1966 void CA_UpLevel (void)
\r
1968 if (ca_levelnum==7)
\r
1969 Quit ("CA_UpLevel: Up past level 7!");
\r
1975 //===========================================================================
\r
1978 ======================
\r
1982 = Goes down a bit level in the needed lists and recaches
\r
1983 = everything from the lower level
\r
1985 ======================
\r
1988 void CA_DownLevel (void)
\r
1991 Quit ("CA_DownLevel: Down past level 0!");
\r
1994 CA_CacheMarks(NULL);
\r
1997 //===========================================================================
\r
2000 ======================
\r
2004 = Clears out all the marks at the current level
\r
2006 ======================
\r
2009 void CA_ClearMarks (global_game_variables_t *gvar)
\r
2013 for (i=0;i<NUMCHUNKS;i++)
\r
2014 gvar->video.grneeded[i]&=~gvar->ca.ca_levelbit;
\r
2017 //===========================================================================
\r
2020 ======================
\r
2022 = CA_ClearAllMarks
\r
2024 = Clears out all the marks on all the levels
\r
2026 ======================
\r
2029 void CA_ClearAllMarks (global_game_variables_t *gvar)
\r
2031 _fmemset (gvar->video.grneeded,0,sizeof(gvar->video.grneeded));
\r
2032 gvar->ca.ca_levelbit = 1;
\r
2033 gvar->ca.ca_levelnum = 0;
\r
2036 //===========================================================================
\r
2039 ======================
\r
2043 ======================
\r
2046 void CA_SetGrPurge (void)
\r
2055 for (i=0;i<NUMCHUNKS;i++)
\r
2057 MM_SetPurge (&(memptr)grsegs[i],3);
\r
2062 ======================
\r
2066 = Make everything possible purgable
\r
2068 ======================
\r
2071 void CA_SetAllPurge (void)
\r
2078 // free cursor sprite and background save
\r
2083 // free map headers and map planes
\r
2085 for (i=0;i<NUMMAPS;i++)
\r
2086 if (mapheaderseg[i])
\r
2087 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
2091 MM_FreePtr (&(memptr)mapsegs[i]);
\r
2096 for (i=0;i<NUMSNDCHUNKS;i++)
\r
2098 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
2107 //===========================================================================
\r
2111 ======================
\r
2115 ======================
\r
2118 #define NUMBARS (17l*8)
\r
2121 unsigned thx,thy,lastx;
\r
2122 long barx,barstep;
\r
2124 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2126 unsigned homex,homey,x;
\r
2128 barstep = (NUMBARS<<16)/numcache;
\r
2131 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2133 US_CenterWindow (20,8);
\r
2137 US_CPrint ("Loading");
\r
2138 fontcolor = F_SECONDCOLOR;
\r
2139 US_CPrint (title);
\r
2140 fontcolor = F_BLACK;
\r
2143 // draw thermometer bar
\r
2147 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2148 VWB_DrawTile8(thx,thy+8,3);
\r
2149 VWB_DrawTile8(thx,thy+16,6);
\r
2150 VWB_DrawTile8(thx+17*8,thy,2);
\r
2151 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2152 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2153 for (x=thx+8;x<thx+17*8;x+=8)
\r
2155 VWB_DrawTile8(x,thy,1);
\r
2156 VWB_DrawTile8(x,thy+8,4);
\r
2157 VWB_DrawTile8(x,thy+16,7);
\r
2160 thx += 4; // first line location
\r
2162 barx = (long)thx<<16;
\r
2165 VW_UpdateScreen();
\r
2170 ======================
\r
2172 = CAL_DialogUpdate
\r
2174 ======================
\r
2177 void CAL_DialogUpdate (void)
\r
2183 if (xh - lastx > BARSTEP)
\r
2185 for (x=lastx;x<=xh;x++)
\r
2186 #if GRMODE == EGAGR
\r
2187 VWB_Vlin (thy,thy+13,x,14);
\r
2189 #if GRMODE == CGAGR
\r
2190 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2193 VW_UpdateScreen();
\r
2198 ======================
\r
2200 = CAL_DialogFinish
\r
2202 ======================
\r
2205 void CAL_DialogFinish (void)
\r
2209 xh = thx + NUMBARS;
\r
2210 for (x=lastx;x<=xh;x++)
\r
2211 #if GRMODE == EGAGR
\r
2212 VWB_Vlin (thy,thy+13,x,14);
\r
2214 #if GRMODE == CGAGR
\r
2215 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2217 VW_UpdateScreen();
\r
2221 //===========================================================================
\r
2224 ======================
\r
2228 ======================
\r
2230 #define MAXEMPTYREAD 1024
\r
2232 void CA_CacheMarks (char *title)
\r
2235 int i,next,numcache;
\r
2236 long pos,endpos,nextpos,nextendpos,compressed;
\r
2237 long bufferstart,bufferend; // file position of general buffer
\r
2239 memptr bigbufferseg;
\r
2241 dialog = (title!=NULL);
\r
2245 // go through and make everything not needed purgable
\r
2247 for (i=0;i<NUMCHUNKS;i++)
\r
2248 if (gvar->video.grneeded[i]&ca_levelbit)
\r
2250 if (grsegs[i]) // its allready in memory, make
\r
2251 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2257 if (grsegs[i]) // not needed, so make it purgeable
\r
2258 MM_SetPurge(&grsegs[i],3);
\r
2261 if (!numcache) // nothing to cache!
\r
2264 // MDM begin - (GAMERS EDGE)
\r
2266 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2267 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2274 write(profilehandle,title,strlen(title));
\r
2275 write(profilehandle,"\n",1);
\r
2278 drawcachebox(title,numcache);
\r
2282 // go through and load in anything still needed
\r
2284 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2286 for (i=0;i<NUMCHUNKS;i++)
\r
2287 if ( (gvar->video.grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2290 // update thermometer
\r
2292 if (dialog && updatecachebox)
\r
2293 updatecachebox ();
\r
2295 pos = GRFILEPOS(i);
\r
2300 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2303 compressed = GRFILEPOS(next)-pos;
\r
2304 endpos = pos+compressed;
\r
2306 if (compressed<=BUFFERSIZE)
\r
2308 if (bufferstart<=pos
\r
2309 && bufferend>= endpos)
\r
2311 // data is allready in buffer
\r
2312 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2316 // load buffer with a new block from disk
\r
2317 // try to get as many of the needed blocks in as possible
\r
2318 while ( next < NUMCHUNKS )
\r
2320 while (next < NUMCHUNKS &&
\r
2321 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2323 if (next == NUMCHUNKS)
\r
2326 nextpos = GRFILEPOS(next);
\r
2327 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2329 nextendpos = GRFILEPOS(next);
\r
2330 if (nextpos - endpos <= MAXEMPTYREAD
\r
2331 && nextendpos-pos <= BUFFERSIZE)
\r
2332 endpos = nextendpos;
\r
2334 next = NUMCHUNKS; // read pos to posend
\r
2337 lseek(grhandle,pos,SEEK_SET);
\r
2338 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2339 bufferstart = pos;
\r
2340 bufferend = endpos;
\r
2341 source = bufferseg;
\r
2346 // big chunk, allocate temporary buffer
\r
2347 MM_GetPtr(&bigbufferseg,compressed);
\r
2350 MM_SetLock (&bigbufferseg,true);
\r
2351 lseek(grhandle,pos,SEEK_SET);
\r
2352 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2353 source = bigbufferseg;
\r
2356 CAL_ExpandGrChunk (i,source);
\r
2360 if (compressed>BUFFERSIZE)
\r
2361 MM_FreePtr(&bigbufferseg);
\r
2366 // finish up any thermometer remnants
\r
2368 if (dialog && finishcachebox)
\r