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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40 //https://github.com/open-watcom/open-watcom-v2/issues/279#issuecomment-244587566 for _seg
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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 (global_game_variables_t *gvar)
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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 //TODO: multiple files
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1106 if ((gvar->ca.file.maphandle[0] = open("data/test.map",
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1107 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1109 printf("Can't open data/test.map!");
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1111 // #ifdef MAPHEADERLINKED
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1112 // if ((maphandle = open("GAMEMAPS."EXT,
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1113 // O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1114 // Quit ("Can't open GAMEMAPS."EXT"!");
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1116 // if ((maphandle = open("MAPTEMP."EXT,
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1117 // O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1118 // Quit ("Can't open MAPTEMP."EXT"!");
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1122 //==========================================================================
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1126 ======================
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1128 = CAL_SetupAudioFile
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1130 ======================
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1133 /*void CAL_SetupAudioFile (void)
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1139 // load maphead.ext (offsets and tileinfo for map file)
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1141 #ifndef AUDIOHEADERLINKED
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1142 if ((handle = open("AUDIOHED."EXT,
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1143 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1144 Quit ("Can't open AUDIOHED."EXT"!");
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1145 length = filelength(handle);
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1146 MM_GetPtr (&(memptr)audiostarts,length);
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1147 CA_FarRead(handle, (byte far *)audiostarts, length);
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1150 audiohuffman = (huffnode *)&audiodict;
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1151 CAL_OptimizeNodes (audiohuffman);
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1152 audiostarts = (long _seg *)FP_SEG(&audiohead);
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1156 // open the data file
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1158 #ifndef AUDIOHEADERLINKED
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1159 if ((audiohandle = open("AUDIOT."EXT,
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1160 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1161 Quit ("Can't open AUDIOT."EXT"!");
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1163 if ((audiohandle = open("AUDIO."EXT,
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1164 O_RDONLY | O_BINARY, S_IREAD)) == -1)
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1165 Quit ("Can't open AUDIO."EXT"!");
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1169 //==========================================================================
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1173 ======================
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1177 = Open all files and load in headers
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1179 ======================
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1182 void CA_Startup(global_game_variables_t *gvar)
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1185 #ifdef __BORLANDC__
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1186 unlink("profile.16b");
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1187 gvar->handle.profilehandle = open("profile.16b", O_CREAT | O_WRONLY | O_TEXT);
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1189 #ifdef __WATCOMC__
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1190 unlink("profile.16w");
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1191 gvar->handle.profilehandle = open("profile.16w", O_CREAT | O_WRONLY | O_TEXT);
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1195 #ifdef __BORLANDC__
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1196 unlink("meminfo.16b");
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1197 gvar->handle.showmemhandle = open("meminfo.16b", O_CREAT | O_WRONLY | O_TEXT);
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1199 #ifdef __WATCOMC__
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1200 unlink("meminfo.16w");
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1201 gvar->handle.showmemhandle = open("meminfo.16w", O_CREAT | O_WRONLY | O_TEXT);
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1204 CAL_SetupGrFile ();
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1205 CAL_SetupAudioFile ();*/
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1207 CAL_SetupMapFile (gvar);
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1209 gvar->ca.mapon = -1;
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1210 gvar->ca.ca_levelbit = 1;
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1211 gvar->ca.ca_levelnum = 0;
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1213 /* drawcachebox = CAL_DialogDraw;
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1214 updatecachebox = CAL_DialogUpdate;
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1215 finishcachebox = CAL_DialogFinish;*/
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1218 //==========================================================================
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1222 ======================
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1226 = Closes all files
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1228 ======================
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1231 void CA_Shutdown(global_game_variables_t *gvar)
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1234 close(gvar->handle.profilehandle);
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1236 close(gvar->handle.showmemhandle);
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1238 close(*(gvar->ca.file.maphandle));
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1241 close(audiohandle);*/
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1244 //===========================================================================
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1247 ======================
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1249 = CA_CacheAudioChunk
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1251 ======================
\r
1254 void CA_CacheAudioChunk (int chunk)
\r
1256 long pos,compressed;
\r
1257 #ifdef AUDIOHEADERLINKED
\r
1259 memptr bigbufferseg;
\r
1263 if (audiosegs[chunk])
\r
1265 MM_SetPurge (&(memptr)audiosegs[chunk],0);
\r
1266 return; // allready in memory
\r
1269 // MDM begin - (GAMERS EDGE)
\r
1271 if (!FindFile("AUDIO."EXT,NULL,2))
\r
1272 Quit("CA_CacheAudioChunk(): Can't find audio files.");
\r
1277 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1278 // a larger buffer
\r
1280 pos = audiostarts[chunk];
\r
1281 compressed = audiostarts[chunk+1]-pos;
\r
1283 lseek(audiohandle,pos,SEEK_SET);
\r
1285 #ifndef AUDIOHEADERLINKED
\r
1287 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
\r
1291 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1295 if (compressed<=BUFFERSIZE)
\r
1297 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1298 source = bufferseg;
\r
1302 MM_GetPtr(&bigbufferseg,compressed);
\r
1305 MM_SetLock (&bigbufferseg,true);
\r
1306 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1307 source = bigbufferseg;
\r
1310 expanded = *(long far *)source;
\r
1311 source += 4; // skip over length
\r
1312 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
\r
1315 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1318 if (compressed>BUFFERSIZE)
\r
1319 MM_FreePtr(&bigbufferseg);
\r
1323 //===========================================================================
\r
1326 ======================
\r
1328 = CA_LoadAllSounds
\r
1330 = Purges all sounds, then loads all new ones (mode switch)
\r
1332 ======================
\r
1335 void CA_LoadAllSounds (void)
\r
1339 switch (oldsoundmode)
\r
1344 start = STARTPCSOUNDS;
\r
1347 start = STARTADLIBSOUNDS;
\r
1351 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1352 if (audiosegs[start])
\r
1353 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
\r
1357 switch (SoundMode)
\r
1362 start = STARTPCSOUNDS;
\r
1365 start = STARTADLIBSOUNDS;
\r
1369 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1370 CA_CacheAudioChunk (start);
\r
1372 oldsoundmode = SoundMode;
\r
1375 //===========================================================================
\r
1377 //++++#if GRMODE == EGAGR
\r
1380 ======================
\r
1384 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1386 ======================
\r
1389 unsigned static sheight,swidth;
\r
1390 boolean static dothemask;
\r
1392 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1393 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1396 sheight = height; // because we are going to reassign bp
\r
1398 dothemask = domask;
\r
1400 asm mov ax,[segment]
\r
1401 asm mov ds,ax // source and dest are in same segment, and all local
\r
1403 asm mov bx,[source]
\r
1406 asm mov bp,[pixshift]
\r
1408 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1410 asm cmp [ss:dothemask],0
\r
1414 // table shift the mask
\r
1416 asm mov dx,[ss:sheight]
\r
1420 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1421 asm mov cx,ss:[swidth]
\r
1425 asm mov al,[bx] // source
\r
1427 asm inc bx // next source byte
\r
1431 asm mov ax,[bp+si] // table shift into two bytes
\r
1433 asm and [di],al // and with first byte
\r
1435 asm mov [di],ah // replace next byte
\r
1437 asm loop domaskbyte
\r
1439 asm inc di // the last shifted byte has 1s in it
\r
1446 // table shift the data
\r
1448 asm mov dx,ss:[sheight]
\r
1450 asm shl dx,1 // four planes of data
\r
1454 asm mov BYTE PTR [di],0 // 0 first byte
\r
1455 asm mov cx,ss:[swidth]
\r
1459 asm mov al,[bx] // source
\r
1460 asm inc bx // next source byte
\r
1464 asm mov ax,[bp+si] // table shift into two bytes
\r
1465 asm or [di],al // or with first byte
\r
1467 asm mov [di],ah // replace next byte
\r
1469 asm loop dodatabyte
\r
1471 asm inc di // the last shifted byte has 0s in it
\r
1479 asm mov ax,ss // restore data segment
\r
1486 //===========================================================================
\r
1489 ======================
\r
1493 = Generate shifts and set up sprite structure for a given sprite
\r
1495 ======================
\r
1498 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1501 unsigned shiftstarts[5];
\r
1502 unsigned smallplane,bigplane,expanded;
\r
1503 spritetabletype far *spr;
\r
1504 spritetype _seg *dest;
\r
1506 #if GRMODE == CGAGR
\r
1508 // CGA has no pel panning, so shifts are never needed
\r
1510 spr = &spritetable[chunk-STARTSPRITES];
\r
1511 smallplane = spr->width*spr->height;
\r
1512 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1515 dest = (spritetype _seg *)grsegs[chunk];
\r
1516 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1517 dest->planesize[0] = smallplane;
\r
1518 dest->width[0] = spr->width;
\r
1521 // expand the unshifted shape
\r
1523 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1528 #if GRMODE == EGAGR
\r
1531 // calculate sizes
\r
1533 spr = &spritetable[chunk-STARTSPRITES];
\r
1534 smallplane = spr->width*spr->height;
\r
1535 bigplane = (spr->width+1)*spr->height;
\r
1537 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1538 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1539 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1540 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1541 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1543 expanded = shiftstarts[spr->shifts];
\r
1544 MM_GetPtr (&grsegs[chunk],expanded);
\r
1547 dest = (spritetype _seg *)grsegs[chunk];
\r
1550 // expand the unshifted shape
\r
1552 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1555 // make the shifts!
\r
1557 switch (spr->shifts)
\r
1562 dest->sourceoffset[i] = shiftstarts[0];
\r
1563 dest->planesize[i] = smallplane;
\r
1564 dest->width[i] = spr->width;
\r
1571 dest->sourceoffset[i] = shiftstarts[0];
\r
1572 dest->planesize[i] = smallplane;
\r
1573 dest->width[i] = spr->width;
\r
1577 dest->sourceoffset[i] = shiftstarts[1];
\r
1578 dest->planesize[i] = bigplane;
\r
1579 dest->width[i] = spr->width+1;
\r
1581 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1582 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1586 dest->sourceoffset[0] = shiftstarts[0];
\r
1587 dest->planesize[0] = smallplane;
\r
1588 dest->width[0] = spr->width;
\r
1590 dest->sourceoffset[1] = shiftstarts[1];
\r
1591 dest->planesize[1] = bigplane;
\r
1592 dest->width[1] = spr->width+1;
\r
1593 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1594 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1596 dest->sourceoffset[2] = shiftstarts[2];
\r
1597 dest->planesize[2] = bigplane;
\r
1598 dest->width[2] = spr->width+1;
\r
1599 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1600 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1602 dest->sourceoffset[3] = shiftstarts[3];
\r
1603 dest->planesize[3] = bigplane;
\r
1604 dest->width[3] = spr->width+1;
\r
1605 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1606 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1611 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1617 //===========================================================================
\r
1621 ======================
\r
1623 = CAL_ExpandGrChunk
\r
1625 = Does whatever is needed with a pointer to a compressed chunk
\r
1627 ======================
\r
1630 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1635 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1638 // expanded sizes of tile8/16/32 are implicit
\r
1641 #if GRMODE == EGAGR
\r
1643 #define MASKBLOCK 40
\r
1646 #if GRMODE == CGAGR
\r
1648 #define MASKBLOCK 32
\r
1651 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1652 expanded = BLOCK*NUMTILE8;
\r
1653 else if (chunk<STARTTILE16)
\r
1654 expanded = MASKBLOCK*NUMTILE8M;
\r
1655 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1656 expanded = BLOCK*4;
\r
1657 else if (chunk<STARTTILE32)
\r
1658 expanded = MASKBLOCK*4;
\r
1659 else if (chunk<STARTTILE32M)
\r
1660 expanded = BLOCK*16;
\r
1662 expanded = MASKBLOCK*16;
\r
1667 // everything else has an explicit size longword
\r
1669 expanded = *(long far *)source;
\r
1670 source += 4; // skip over length
\r
1674 // allocate final space, decompress it, and free bigbuffer
\r
1675 // Sprites need to have shifts made and various other junk
\r
1677 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1678 CAL_CacheSprite(chunk,source);
\r
1681 MM_GetPtr (&grsegs[chunk],expanded);
\r
1684 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1690 ======================
\r
1694 = Gets a chunk off disk, optimizing reads to general buffer
\r
1696 ======================
\r
1699 void CAL_ReadGrChunk (int chunk)
\r
1701 long pos,compressed;
\r
1702 memptr bigbufferseg;
\r
1707 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1708 // a larger buffer
\r
1710 pos = GRFILEPOS(chunk);
\r
1711 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1715 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1718 compressed = GRFILEPOS(next)-pos;
\r
1720 lseek(grhandle,pos,SEEK_SET);
\r
1722 if (compressed<=BUFFERSIZE)
\r
1724 CA_FarRead(grhandle,bufferseg,compressed);
\r
1725 source = bufferseg;
\r
1729 MM_GetPtr(&bigbufferseg,compressed);
\r
1732 MM_SetLock (&bigbufferseg,true);
\r
1733 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1734 source = bigbufferseg;
\r
1737 CAL_ExpandGrChunk (chunk,source);
\r
1739 if (compressed>BUFFERSIZE)
\r
1740 MM_FreePtr(&bigbufferseg);
\r
1744 ======================
\r
1748 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1750 ======================
\r
1753 void CA_CacheGrChunk (int chunk)
\r
1755 long pos,compressed;
\r
1756 memptr bigbufferseg;
\r
1760 gvar->video.grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1761 if (grsegs[chunk])
\r
1763 MM_SetPurge (&grsegs[chunk],0);
\r
1764 return; // allready in memory
\r
1767 // MDM begin - (GAMERS EDGE)
\r
1769 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1770 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1775 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1776 // a larger buffer
\r
1778 pos = GRFILEPOS(chunk);
\r
1779 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1783 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1786 compressed = GRFILEPOS(next)-pos;
\r
1788 lseek(grhandle,pos,SEEK_SET);
\r
1790 if (compressed<=BUFFERSIZE)
\r
1792 CA_FarRead(grhandle,bufferseg,compressed);
\r
1793 source = bufferseg;
\r
1797 MM_GetPtr(&bigbufferseg,compressed);
\r
1798 MM_SetLock (&bigbufferseg,true);
\r
1799 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1800 source = bigbufferseg;
\r
1803 CAL_ExpandGrChunk (chunk,source);
\r
1805 if (compressed>BUFFERSIZE)
\r
1806 MM_FreePtr(&bigbufferseg);
\r
1811 //==========================================================================
\r
1814 ======================
\r
1818 ======================
\r
1820 /*++++ fuckin segments!
\r
1821 void CA_CacheMap (global_game_variables_t *gvar)
\r
1823 long pos,compressed;
\r
1825 memptr *dest,bigbufferseg;
\r
1827 unsigned far *source;
\r
1828 #ifdef MAPHEADERLINKED
\r
1829 memptr buffer2seg;
\r
1835 // free up memory from last map
\r
1837 // if (gvar->ca.map.mapon>-1 && gvar->ca.map.mapheaderseg[gvar->ca.map.mapon])
\r
1838 // MM_SetPurge (&(memptr)gvar->ca.map.mapheaderseg[gvar-ca.map.mapon],3);
\r
1839 for (plane=0;plane<MAPPLANES;plane++)
\r
1840 if (gvar->ca.map.mapsegs[plane])
\r
1841 MM_FreePtr (&(memptr)gvar->ca.map.mapsegs[plane]);
\r
1843 gvar->ca.map.mapon = gvar->ca.map.mapnum;
\r
1847 // load map header
\r
1848 // The header will be cached if it is still around
\r
1850 if (!gvar->ca.map.mapheaderseg[gvar->ca.map.mapnum])
\r
1852 pos = ((__segmement *)tinf)->headeroffsets[gvar->ca.mapnum];
\r
1853 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1854 printf("CA_CacheMap: Tried to load a non existent map!");
\r
1856 MM_GetPtr(&(memptr)gvar->ca.mapheaderseg[mapnum],sizeof(maptype));
\r
1857 lseek(maphandle,pos,SEEK_SET);
\r
1858 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1861 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1864 // load the planes in
\r
1865 // If a plane's pointer still exists it will be overwritten (levels are
\r
1866 // allways reloaded, never cached)
\r
1869 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1871 for (plane = 0; plane<MAPPLANES; plane++)
\r
1873 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1874 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1877 continue; // the plane is not used in this game
\r
1879 dest = &(memptr)mapsegs[plane];
\r
1880 MM_GetPtr(dest,size);
\r
1882 lseek(maphandle,pos,SEEK_SET);
\r
1883 if (compressed<=BUFFERSIZE)
\r
1884 source = bufferseg;
\r
1887 MM_GetPtr(&bigbufferseg,compressed);
\r
1888 MM_SetLock (&bigbufferseg,true);
\r
1889 source = bigbufferseg;
\r
1892 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1893 #ifdef MAPHEADERLINKED
\r
1895 // unhuffman, then unRLEW
\r
1896 // The huffman'd chunk has a two byte expanded length first
\r
1897 // The resulting RLEW chunk also does, even though it's not really
\r
1900 expanded = *source;
\r
1902 MM_GetPtr (&buffer2seg,expanded);
\r
1903 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1904 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1905 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1906 MM_FreePtr (&buffer2seg);
\r
1910 // unRLEW, skipping expanded length
\r
1912 CA_RLEWexpand (source+1, *dest,size,
\r
1913 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1916 if (compressed>BUFFERSIZE)
\r
1917 MM_FreePtr(&bigbufferseg);
\r
1921 //===========================================================================
\r
1924 ======================
\r
1928 = Goes up a bit level in the needed lists and clears it out.
\r
1929 = Everything is made purgable
\r
1931 ======================
\r
1934 void CA_UpLevel (void)
\r
1936 if (ca_levelnum==7)
\r
1937 Quit ("CA_UpLevel: Up past level 7!");
\r
1943 //===========================================================================
\r
1946 ======================
\r
1950 = Goes down a bit level in the needed lists and recaches
\r
1951 = everything from the lower level
\r
1953 ======================
\r
1956 void CA_DownLevel (void)
\r
1959 Quit ("CA_DownLevel: Down past level 0!");
\r
1962 CA_CacheMarks(NULL);
\r
1965 //===========================================================================
\r
1968 ======================
\r
1972 = Clears out all the marks at the current level
\r
1974 ======================
\r
1977 void CA_ClearMarks (global_game_variables_t *gvar)
\r
1981 for (i=0;i<NUMCHUNKS;i++)
\r
1982 gvar->video.grneeded[i]&=~gvar->ca.ca_levelbit;
\r
1985 //===========================================================================
\r
1988 ======================
\r
1990 = CA_ClearAllMarks
\r
1992 = Clears out all the marks on all the levels
\r
1994 ======================
\r
1997 void CA_ClearAllMarks (global_game_variables_t *gvar)
\r
1999 _fmemset (gvar->video.grneeded,0,sizeof(gvar->video.grneeded));
\r
2000 gvar->ca.ca_levelbit = 1;
\r
2001 gvar->ca.ca_levelnum = 0;
\r
2004 //===========================================================================
\r
2007 ======================
\r
2011 ======================
\r
2014 void CA_SetGrPurge (void)
\r
2023 for (i=0;i<NUMCHUNKS;i++)
\r
2025 MM_SetPurge (&(memptr)grsegs[i],3);
\r
2030 ======================
\r
2034 = Make everything possible purgable
\r
2036 ======================
\r
2039 void CA_SetAllPurge (void)
\r
2046 // free cursor sprite and background save
\r
2051 // free map headers and map planes
\r
2053 for (i=0;i<NUMMAPS;i++)
\r
2054 if (mapheaderseg[i])
\r
2055 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
2059 MM_FreePtr (&(memptr)mapsegs[i]);
\r
2064 for (i=0;i<NUMSNDCHUNKS;i++)
\r
2066 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
2075 //===========================================================================
\r
2079 ======================
\r
2083 ======================
\r
2086 #define NUMBARS (17l*8)
\r
2089 unsigned thx,thy,lastx;
\r
2090 long barx,barstep;
\r
2092 void CAL_DialogDraw (char *title,unsigned numcache)
\r
2094 unsigned homex,homey,x;
\r
2096 barstep = (NUMBARS<<16)/numcache;
\r
2099 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
2101 US_CenterWindow (20,8);
\r
2105 US_CPrint ("Loading");
\r
2106 fontcolor = F_SECONDCOLOR;
\r
2107 US_CPrint (title);
\r
2108 fontcolor = F_BLACK;
\r
2111 // draw thermometer bar
\r
2115 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
2116 VWB_DrawTile8(thx,thy+8,3);
\r
2117 VWB_DrawTile8(thx,thy+16,6);
\r
2118 VWB_DrawTile8(thx+17*8,thy,2);
\r
2119 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
2120 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
2121 for (x=thx+8;x<thx+17*8;x+=8)
\r
2123 VWB_DrawTile8(x,thy,1);
\r
2124 VWB_DrawTile8(x,thy+8,4);
\r
2125 VWB_DrawTile8(x,thy+16,7);
\r
2128 thx += 4; // first line location
\r
2130 barx = (long)thx<<16;
\r
2133 VW_UpdateScreen();
\r
2138 ======================
\r
2140 = CAL_DialogUpdate
\r
2142 ======================
\r
2145 void CAL_DialogUpdate (void)
\r
2151 if (xh - lastx > BARSTEP)
\r
2153 for (x=lastx;x<=xh;x++)
\r
2154 #if GRMODE == EGAGR
\r
2155 VWB_Vlin (thy,thy+13,x,14);
\r
2157 #if GRMODE == CGAGR
\r
2158 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2161 VW_UpdateScreen();
\r
2166 ======================
\r
2168 = CAL_DialogFinish
\r
2170 ======================
\r
2173 void CAL_DialogFinish (void)
\r
2177 xh = thx + NUMBARS;
\r
2178 for (x=lastx;x<=xh;x++)
\r
2179 #if GRMODE == EGAGR
\r
2180 VWB_Vlin (thy,thy+13,x,14);
\r
2182 #if GRMODE == CGAGR
\r
2183 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2185 VW_UpdateScreen();
\r
2189 //===========================================================================
\r
2192 ======================
\r
2196 ======================
\r
2198 #define MAXEMPTYREAD 1024
\r
2200 void CA_CacheMarks (char *title)
\r
2203 int i,next,numcache;
\r
2204 long pos,endpos,nextpos,nextendpos,compressed;
\r
2205 long bufferstart,bufferend; // file position of general buffer
\r
2207 memptr bigbufferseg;
\r
2209 dialog = (title!=NULL);
\r
2213 // go through and make everything not needed purgable
\r
2215 for (i=0;i<NUMCHUNKS;i++)
\r
2216 if (gvar->video.grneeded[i]&ca_levelbit)
\r
2218 if (grsegs[i]) // its allready in memory, make
\r
2219 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2225 if (grsegs[i]) // not needed, so make it purgeable
\r
2226 MM_SetPurge(&grsegs[i],3);
\r
2229 if (!numcache) // nothing to cache!
\r
2232 // MDM begin - (GAMERS EDGE)
\r
2234 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2235 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2242 write(profilehandle,title,strlen(title));
\r
2243 write(profilehandle,"\n",1);
\r
2246 drawcachebox(title,numcache);
\r
2250 // go through and load in anything still needed
\r
2252 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2254 for (i=0;i<NUMCHUNKS;i++)
\r
2255 if ( (gvar->video.grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2258 // update thermometer
\r
2260 if (dialog && updatecachebox)
\r
2261 updatecachebox ();
\r
2263 pos = GRFILEPOS(i);
\r
2268 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2271 compressed = GRFILEPOS(next)-pos;
\r
2272 endpos = pos+compressed;
\r
2274 if (compressed<=BUFFERSIZE)
\r
2276 if (bufferstart<=pos
\r
2277 && bufferend>= endpos)
\r
2279 // data is allready in buffer
\r
2280 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2284 // load buffer with a new block from disk
\r
2285 // try to get as many of the needed blocks in as possible
\r
2286 while ( next < NUMCHUNKS )
\r
2288 while (next < NUMCHUNKS &&
\r
2289 !(gvar->video.grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2291 if (next == NUMCHUNKS)
\r
2294 nextpos = GRFILEPOS(next);
\r
2295 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2297 nextendpos = GRFILEPOS(next);
\r
2298 if (nextpos - endpos <= MAXEMPTYREAD
\r
2299 && nextendpos-pos <= BUFFERSIZE)
\r
2300 endpos = nextendpos;
\r
2302 next = NUMCHUNKS; // read pos to posend
\r
2305 lseek(grhandle,pos,SEEK_SET);
\r
2306 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2307 bufferstart = pos;
\r
2308 bufferend = endpos;
\r
2309 source = bufferseg;
\r
2314 // big chunk, allocate temporary buffer
\r
2315 MM_GetPtr(&bigbufferseg,compressed);
\r
2318 MM_SetLock (&bigbufferseg,true);
\r
2319 lseek(grhandle,pos,SEEK_SET);
\r
2320 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2321 source = bigbufferseg;
\r
2324 CAL_ExpandGrChunk (i,source);
\r
2328 if (compressed>BUFFERSIZE)
\r
2329 MM_FreePtr(&bigbufferseg);
\r
2334 // finish up any thermometer remnants
\r
2336 if (dialog && finishcachebox)
\r