1 /* Catacomb Apocalypse Source Code
\r
2 * Copyright (C) 1993-2014 Flat Rock Software
\r
4 * This program is free software; you can redistribute it and/or modify
\r
5 * it under the terms of the GNU General Public License as published by
\r
6 * the Free Software Foundation; either version 2 of the License, or
\r
7 * (at your option) any later version.
\r
9 * This program is distributed in the hope that it will be useful,
\r
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
12 * GNU General Public License for more details.
\r
14 * You should have received a copy of the GNU General Public License along
\r
15 * with this program; if not, write to the Free Software Foundation, Inc.,
\r
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
\r
22 =============================================================================
\r
24 Id Software Caching Manager
\r
25 ---------------------------
\r
27 Must be started BEFORE the memory manager, because it needs to get the headers
\r
28 loaded into the data segment
\r
30 =============================================================================
\r
33 #include "src/lib/16_head.h"
\r
34 //#include "ID_STRS.H"
\r
36 //#define THREEBYTEGRSTARTS
\r
39 =============================================================================
\r
43 =============================================================================
\r
48 unsigned bit0,bit1; // 0-255 is a character, > is a pointer to a node
\r
55 long headeroffsets[100];
\r
61 =============================================================================
\r
65 =============================================================================
\r
71 unsigned _seg *mapsegs[3];
\r
72 maptype _seg *mapheaderseg[NUMMAPS];
\r
73 byte _seg *audiosegs[NUMSNDCHUNKS];
\r
74 void _seg *grsegs[NUMCHUNKS];
\r
76 byte far grneeded[NUMCHUNKS];
\r
77 byte ca_levelbit,ca_levelnum;
\r
79 int profilehandle,debughandle;*/
\r
81 void (*drawcachebox) (char *title, unsigned numcache);
\r
82 void (*updatecachebox) (void);
\r
83 void (*finishcachebox) (void);
\r
86 =============================================================================
\r
90 =============================================================================
\r
93 /*extern long far CGAhead;
\r
94 extern long far EGAhead;
\r
95 extern byte CGAdict;
\r
96 extern byte EGAdict;
\r
97 extern byte far maphead;
\r
98 extern byte mapdict;
\r
99 extern byte far audiohead;
\r
100 extern byte audiodict;
\r
103 long _seg *grstarts; // array of offsets in egagraph, -1 for sparse
\r
104 long _seg *audiostarts; // array of offsets in audio / audiot
\r
106 #ifdef GRHEADERLINKED
\r
107 huffnode *grhuffman;
\r
109 huffnode grhuffman[255];
\r
112 #ifdef AUDIOHEADERLINKED
\r
113 huffnode *audiohuffman;
\r
115 huffnode audiohuffman[255];
\r
119 int grhandle; // handle to EGAGRAPH
\r
120 int maphandle; // handle to MAPTEMP / GAMEMAPS
\r
121 int audiohandle; // handle to AUDIOT / AUDIO
\r
123 long chunkcomplen,chunkexplen;
\r
125 SDMode oldsoundmode;
\r
129 void CAL_DialogDraw (char *title,unsigned numcache);
\r
130 void CAL_DialogUpdate (void);
\r
131 void CAL_DialogFinish (void);*/
\r
132 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest,
\r
136 /*#ifdef THREEBYTEGRSTARTS
\r
137 #define FILEPOSSIZE 3*/
\r
138 //#define GRFILEPOS(c) (*(long far *)(((byte far *)grstarts)+(c)*3)&0xffffff)
\r
139 long GRFILEPOS(int c)
\r
146 value = *(long far *)(((byte far *)grstarts)+offset);
\r
148 value &= 0x00ffffffl;
\r
150 if (value == 0xffffffl)
\r
156 #define FILEPOSSIZE 4
\r
157 #define GRFILEPOS(c) (grstarts[c])
\r
161 =============================================================================
\r
165 =============================================================================
\r
169 ============================
\r
171 = CA_OpenDebug / CA_CloseDebug
\r
173 = Opens a binary file with the handle "debughandle"
\r
175 ============================
\r
178 void CA_OpenDebug (void)
\r
180 unlink ("DEBUG.TXT");
\r
181 debughandle = open("DEBUG.TXT", O_CREAT | O_WRONLY | O_TEXT);
\r
184 void CA_CloseDebug (void)
\r
186 close (debughandle);
\r
192 ============================
\r
194 = CAL_GetGrChunkLength
\r
196 = Gets the length of an explicit length chunk (not tiles)
\r
197 = The file pointer is positioned so the compressed data can be read in next.
\r
199 ============================
\r
202 void CAL_GetGrChunkLength (int chunk)
\r
204 lseek(grhandle,GRFILEPOS(chunk),SEEK_SET);
\r
205 read(grhandle,&chunkexplen,sizeof(chunkexplen));
\r
206 chunkcomplen = GRFILEPOS(chunk+1)-GRFILEPOS(chunk)-4;
\r
211 ==========================
\r
215 = Read from a file to a far pointer
\r
217 ==========================
\r
220 boolean CA_FarRead (int handle, byte far *dest, long length)
\r
222 union REGS CPURegs;
\r
223 if (length>0xffffl)
\r
224 printf("CA_FarRead doesn't support 64K reads yet!\n");
\r
230 mov cx,[WORD PTR length]
\r
231 mov dx,[WORD PTR dest]
\r
232 mov ds,[WORD PTR dest+2]
\r
233 mov ah,0x3f // READ w/handle
\r
238 errno = CPURegs.x.ax;
\r
243 cmp ax,[WORD PTR length]
\r
245 errno = EINVFMT; // user manager knows this is bad read
\r
253 ==========================
\r
257 = Write from a file to a far pointer
\r
259 ==========================
\r
262 boolean CA_FarWrite (int handle, byte far *source, long length)
\r
264 if (length>0xffffl)
\r
265 Quit ("CA_FarWrite doesn't support 64K reads yet!");
\r
268 asm mov bx,[handle]
\r
269 asm mov cx,[WORD PTR length]
\r
270 asm mov dx,[WORD PTR source]
\r
271 asm mov ds,[WORD PTR source+2]
\r
272 asm mov ah,0x40 // WRITE w/handle
\r
279 asm cmp ax,[WORD PTR length]
\r
281 errno = ENOMEM; // user manager knows this is bad write
\r
290 ==========================
\r
294 = Reads a file into an allready allocated buffer
\r
296 ==========================
\r
299 boolean CA_ReadFile (char *filename, memptr *ptr)
\r
304 if ((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
307 size = filelength (handle);
\r
308 if (!CA_FarRead (handle,*ptr,size))
\r
320 ==========================
\r
324 = Allocate space for and load a file
\r
326 ==========================
\r
329 boolean CA_LoadFile (char *filename, memptr *ptr)
\r
334 if ((handle = open(filename,O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
337 size = filelength (handle);
\r
338 MM_GetPtr (ptr,size);
\r
339 if (!CA_FarRead (handle,*ptr,size))
\r
349 ============================================================================
\r
351 COMPRESSION routines, see JHUFF.C for more
\r
353 ============================================================================
\r
361 = CAL_OptimizeNodes
\r
363 = Goes through a huffman table and changes the 256-511 node numbers to the
\r
364 = actular address of the node. Must be called before CAL_HuffExpand
\r
369 void CAL_OptimizeNodes(huffnode *table)
\r
376 for (i=0;i<255;i++)
\r
378 if (node->bit0 >= 256)
\r
379 node->bit0 = (unsigned)(table+(node->bit0-256));
\r
380 if (node->bit1 >= 256)
\r
381 node->bit1 = (unsigned)(table+(node->bit1-256));
\r
389 ======================
\r
393 = Length is the length of the EXPANDED data
\r
395 ======================
\r
398 void CAL_HuffExpand (byte huge *source, byte huge *dest,
\r
399 long length,huffnode *hufftable)
\r
401 // unsigned bit,byte,node,code;
\r
402 unsigned sourceseg,sourceoff,destseg,destoff,endoff;
\r
404 // huffnode *nodeon;
\r
406 headptr = hufftable+254; // head node is allways node 254
\r
408 source++; // normalize
\r
413 sourceseg = FP_SEG(source);
\r
414 sourceoff = FP_OFF(source);
\r
415 destseg = FP_SEG(dest);
\r
416 destoff = FP_OFF(dest);
\r
417 endoff = destoff+length;
\r
422 // ss:bx node pointer
\r
425 if (length <0xfff0)
\r
428 //--------------------------
\r
429 // expand less than 64k of data
\r
430 //--------------------------
\r
432 asm mov bx,[headptr]
\r
434 asm mov si,[sourceoff]
\r
435 asm mov di,[destoff]
\r
436 asm mov es,[destseg]
\r
437 asm mov ds,[sourceseg]
\r
438 asm mov ax,[endoff]
\r
440 asm mov ch,[si] // load first byte
\r
445 asm test ch,cl // bit set?
\r
447 asm mov dx,[ss:bx] // take bit0 path from node
\r
448 asm shl cl,1 // advance to next bit position
\r
449 asm jc newbyteshort
\r
450 asm jnc sourceupshort
\r
453 asm mov dx,[ss:bx+2] // take bit1 path
\r
454 asm shl cl,1 // advance to next bit position
\r
455 asm jnc sourceupshort
\r
458 asm mov ch,[si] // load next byte
\r
460 asm mov cl,1 // back to first bit
\r
463 asm or dh,dh // if dx<256 its a byte, else move node
\r
464 asm jz storebyteshort
\r
465 asm mov bx,dx // next node = (huffnode *)code
\r
466 asm jmp expandshort
\r
470 asm inc di // write a decopmpressed byte out
\r
471 asm mov bx,[headptr] // back to the head node for next bit
\r
473 asm cmp di,ax // done?
\r
474 asm jne expandshort
\r
479 //--------------------------
\r
480 // expand more than 64k of data
\r
481 //--------------------------
\r
485 asm mov bx,[headptr]
\r
488 asm mov si,[sourceoff]
\r
489 asm mov di,[destoff]
\r
490 asm mov es,[destseg]
\r
491 asm mov ds,[sourceseg]
\r
493 asm lodsb // load first byte
\r
496 asm test al,cl // bit set?
\r
498 asm mov dx,[ss:bx] // take bit0 path from node
\r
501 asm mov dx,[ss:bx+2] // take bit1 path
\r
504 asm shl cl,1 // advance to next bit position
\r
507 asm cmp si,0x10 // normalize ds:si
\r
514 asm mov cl,1 // back to first bit
\r
517 asm or dh,dh // if dx<256 its a byte, else move node
\r
519 asm mov bx,dx // next node = (huffnode *)code
\r
524 asm inc di // write a decopmpressed byte out
\r
525 asm mov bx,[headptr] // back to the head node for next bit
\r
527 asm cmp di,0x10 // normalize es:di
\r
535 asm sub [WORD PTR ss:length],1
\r
537 asm dec [WORD PTR ss:length+2]
\r
538 asm jns expand // when length = ffff ffff, done
\r
549 ======================
\r
551 = CAL_CarmackExpand
\r
553 = Length is the length of the EXPANDED data
\r
555 ======================
\r
558 #define NEARTAG 0xa7
\r
559 #define FARTAG 0xa8
\r
561 void CAL_CarmackExpand (unsigned far *source, unsigned far *dest, unsigned length)
\r
563 unsigned ch,chhigh,count,offset;
\r
564 unsigned far *copyptr, far *inptr, far *outptr;
\r
575 if (chhigh == NEARTAG)
\r
579 { // have to insert a word containing the tag byte
\r
580 ch |= *((unsigned char far *)inptr)++;
\r
586 offset = *((unsigned char far *)inptr)++;
\r
587 copyptr = outptr - offset;
\r
590 *outptr++ = *copyptr++;
\r
593 else if (chhigh == FARTAG)
\r
597 { // have to insert a word containing the tag byte
\r
598 ch |= *((unsigned char far *)inptr)++;
\r
605 copyptr = dest + offset;
\r
608 *outptr++ = *copyptr++;
\r
622 ======================
\r
626 ======================
\r
629 long CA_RLEWCompress (unsigned huge *source, long length, unsigned huge *dest,
\r
633 unsigned value,count,i;
\r
634 unsigned huge *start,huge *end;
\r
638 end = source + (length+1)/2;
\r
647 while (*source == value && source<end)
\r
652 if (count>3 || value == rlewtag)
\r
655 // send a tag / count / value string
\r
664 // send word without compressing
\r
666 for (i=1;i<=count;i++)
\r
670 } while (source<end);
\r
672 complength = 2*(dest-start);
\r
678 ======================
\r
681 = length is EXPANDED length
\r
683 ======================
\r
686 void CA_RLEWexpand (unsigned huge *source, unsigned huge *dest,long length,
\r
689 // unsigned value,count,i;
\r
690 unsigned huge *end;
\r
691 unsigned sourceseg,sourceoff,destseg,destoff,endseg,endoff;
\r
701 if (value != rlewtag)
\r
709 // compressed string
\r
713 for (i=1;i<=count;i++)
\r
716 } while (dest<end);
\r
719 end = dest + (length)/2;
\r
720 sourceseg = FP_SEG(source);
\r
721 sourceoff = FP_OFF(source);
\r
722 destseg = FP_SEG(dest);
\r
723 destoff = FP_OFF(dest);
\r
724 endseg = FP_SEG(end);
\r
725 endoff = FP_OFF(end);
\r
729 // ax = source value
\r
731 // cx = repeat counts
\r
734 // NOTE: A repeat count that produces 0xfff0 bytes can blow this!
\r
738 asm mov si,sourceoff
\r
741 asm mov ds,sourceseg
\r
752 asm mov cx,ax // repeat count
\r
753 asm lodsw // repeat value
\r
758 asm cmp si,0x10 // normalize ds:si
\r
770 asm cmp di,0x10 // normalize es:di
\r
783 asm cmp di,ss:endoff
\r
786 asm cmp ax,ss:endseg
\r
797 =============================================================================
\r
799 CACHE MANAGER ROUTINES
\r
801 =============================================================================
\r
805 ======================
\r
809 ======================
\r
812 void CAL_SetupGrFile (void)
\r
817 #ifdef GRHEADERLINKED
\r
819 #if GRMODE == EGAGR
\r
820 grhuffman = (huffnode *)&EGAdict;
\r
821 grstarts = (long _seg *)FP_SEG(&EGAhead);
\r
823 #if GRMODE == CGAGR
\r
824 grhuffman = (huffnode *)&CGAdict;
\r
825 grstarts = (long _seg *)FP_SEG(&CGAhead);
\r
828 CAL_OptimizeNodes (grhuffman);
\r
833 // load ???dict.ext (huffman dictionary for graphics files)
\r
836 if ((handle = open(GREXT"DICT."EXT,
\r
837 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
838 Quit ("Can't open "GREXT"DICT."EXT"!");
\r
840 read(handle, &grhuffman, sizeof(grhuffman));
\r
842 CAL_OptimizeNodes (grhuffman);
\r
844 // load the data offsets from ???head.ext
\r
846 MM_GetPtr (&(memptr)grstarts,(NUMCHUNKS+1)*FILEPOSSIZE);
\r
848 if ((handle = open(GREXT"HEAD."EXT,
\r
849 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
850 Quit ("Can't open "GREXT"HEAD."EXT"!");
\r
852 CA_FarRead(handle, (memptr)grstarts, (NUMCHUNKS+1)*FILEPOSSIZE);
\r
860 // Open the graphics file, leaving it open until the game is finished
\r
862 grhandle = open(GREXT"GRAPH."EXT, O_RDONLY | O_BINARY);
\r
863 if (grhandle == -1)
\r
864 Quit ("Cannot open "GREXT"GRAPH."EXT"!");
\r
868 // load the pic and sprite headers into the arrays in the data segment
\r
871 MM_GetPtr(&(memptr)pictable,NUMPICS*sizeof(pictabletype));
\r
872 CAL_GetGrChunkLength(STRUCTPIC); // position file pointer
\r
873 MM_GetPtr(&compseg,chunkcomplen);
\r
874 CA_FarRead (grhandle,compseg,chunkcomplen);
\r
875 CAL_HuffExpand (compseg, (byte huge *)pictable,NUMPICS*sizeof(pictabletype),grhuffman);
\r
876 MM_FreePtr(&compseg);
\r
880 MM_GetPtr(&(memptr)picmtable,NUMPICM*sizeof(pictabletype));
\r
881 CAL_GetGrChunkLength(STRUCTPICM); // position file pointer
\r
882 MM_GetPtr(&compseg,chunkcomplen);
\r
883 CA_FarRead (grhandle,compseg,chunkcomplen);
\r
884 CAL_HuffExpand (compseg, (byte huge *)picmtable,NUMPICS*sizeof(pictabletype),grhuffman);
\r
885 MM_FreePtr(&compseg);
\r
889 MM_GetPtr(&(memptr)spritetable,NUMSPRITES*sizeof(spritetabletype));
\r
890 CAL_GetGrChunkLength(STRUCTSPRITE); // position file pointer
\r
891 MM_GetPtr(&compseg,chunkcomplen);
\r
892 CA_FarRead (grhandle,compseg,chunkcomplen);
\r
893 CAL_HuffExpand (compseg, (byte huge *)spritetable,NUMSPRITES*sizeof(spritetabletype),grhuffman);
\r
894 MM_FreePtr(&compseg);
\r
899 //==========================================================================
\r
903 ======================
\r
907 ======================
\r
910 void CAL_SetupMapFile (void)
\r
916 // load maphead.ext (offsets and tileinfo for map file)
\r
918 #ifndef MAPHEADERLINKED
\r
919 if ((handle = open("MAPHEAD."EXT,
\r
920 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
921 Quit ("Can't open MAPHEAD."EXT"!");
\r
922 length = filelength(handle);
\r
923 MM_GetPtr (&(memptr)tinf,length);
\r
924 CA_FarRead(handle, tinf, length);
\r
928 tinf = (byte _seg *)FP_SEG(&maphead);
\r
933 // open the data file
\r
935 #ifdef MAPHEADERLINKED
\r
936 if ((maphandle = open("GAMEMAPS."EXT,
\r
937 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
938 Quit ("Can't open GAMEMAPS."EXT"!");
\r
940 if ((maphandle = open("MAPTEMP."EXT,
\r
941 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
942 Quit ("Can't open MAPTEMP."EXT"!");
\r
946 //==========================================================================
\r
950 ======================
\r
952 = CAL_SetupAudioFile
\r
954 ======================
\r
957 void CAL_SetupAudioFile (void)
\r
963 // load maphead.ext (offsets and tileinfo for map file)
\r
965 #ifndef AUDIOHEADERLINKED
\r
966 if ((handle = open("AUDIOHED."EXT,
\r
967 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
968 Quit ("Can't open AUDIOHED."EXT"!");
\r
969 length = filelength(handle);
\r
970 MM_GetPtr (&(memptr)audiostarts,length);
\r
971 CA_FarRead(handle, (byte far *)audiostarts, length);
\r
974 audiohuffman = (huffnode *)&audiodict;
\r
975 CAL_OptimizeNodes (audiohuffman);
\r
976 audiostarts = (long _seg *)FP_SEG(&audiohead);
\r
980 // open the data file
\r
982 #ifndef AUDIOHEADERLINKED
\r
983 if ((audiohandle = open("AUDIOT."EXT,
\r
984 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
985 Quit ("Can't open AUDIOT."EXT"!");
\r
987 if ((audiohandle = open("AUDIO."EXT,
\r
988 O_RDONLY | O_BINARY, S_IREAD)) == -1)
\r
989 Quit ("Can't open AUDIO."EXT"!");
\r
993 //==========================================================================
\r
997 ======================
\r
1001 = Open all files and load in headers
\r
1003 ======================
\r
1006 void CA_Startup (void)
\r
1009 unlink ("PROFILE.TXT");
\r
1010 profilehandle = open("PROFILE.TXT", O_CREAT | O_WRONLY | O_TEXT);
\r
1013 // MDM begin - (GAMERS EDGE)
\r
1015 if (!FindFile("AUDIO."EXT,NULL,2))
\r
1016 Quit("CA_Startup(): Can't find audio files.");
\r
1021 CAL_SetupAudioFile ();
\r
1024 // MDM begin - (GAMERS EDGE)
\r
1026 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1027 Quit("CA_Startup(): Can't find level files.");
\r
1032 CAL_SetupMapFile ();
\r
1035 // MDM begin - (GAMERS EDGE)
\r
1037 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1038 Quit("CA_Startup(): Can't find graphics files.");
\r
1042 #ifndef NOGRAPHICS
\r
1043 CAL_SetupGrFile ();
\r
1050 drawcachebox = CAL_DialogDraw;
\r
1051 updatecachebox = CAL_DialogUpdate;
\r
1052 finishcachebox = CAL_DialogFinish;
\r
1055 //==========================================================================
\r
1059 ======================
\r
1063 = Closes all files
\r
1065 ======================
\r
1068 void CA_Shutdown (void)
\r
1071 close (profilehandle);
\r
1074 close (maphandle);
\r
1076 close (audiohandle);
\r
1079 //===========================================================================
\r
1082 ======================
\r
1084 = CA_CacheAudioChunk
\r
1086 ======================
\r
1089 void CA_CacheAudioChunk (int chunk)
\r
1091 long pos,compressed;
\r
1092 #ifdef AUDIOHEADERLINKED
\r
1094 memptr bigbufferseg;
\r
1098 if (audiosegs[chunk])
\r
1100 MM_SetPurge (&(memptr)audiosegs[chunk],0);
\r
1101 return; // allready in memory
\r
1104 // MDM begin - (GAMERS EDGE)
\r
1106 if (!FindFile("AUDIO."EXT,NULL,2))
\r
1107 Quit("CA_CacheAudioChunk(): Can't find audio files.");
\r
1112 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1113 // a larger buffer
\r
1115 pos = audiostarts[chunk];
\r
1116 compressed = audiostarts[chunk+1]-pos;
\r
1118 lseek(audiohandle,pos,SEEK_SET);
\r
1120 #ifndef AUDIOHEADERLINKED
\r
1122 MM_GetPtr (&(memptr)audiosegs[chunk],compressed);
\r
1126 CA_FarRead(audiohandle,audiosegs[chunk],compressed);
\r
1130 if (compressed<=BUFFERSIZE)
\r
1132 CA_FarRead(audiohandle,bufferseg,compressed);
\r
1133 source = bufferseg;
\r
1137 MM_GetPtr(&bigbufferseg,compressed);
\r
1140 MM_SetLock (&bigbufferseg,true);
\r
1141 CA_FarRead(audiohandle,bigbufferseg,compressed);
\r
1142 source = bigbufferseg;
\r
1145 expanded = *(long far *)source;
\r
1146 source += 4; // skip over length
\r
1147 MM_GetPtr (&(memptr)audiosegs[chunk],expanded);
\r
1150 CAL_HuffExpand (source,audiosegs[chunk],expanded,audiohuffman);
\r
1153 if (compressed>BUFFERSIZE)
\r
1154 MM_FreePtr(&bigbufferseg);
\r
1158 //===========================================================================
\r
1161 ======================
\r
1163 = CA_LoadAllSounds
\r
1165 = Purges all sounds, then loads all new ones (mode switch)
\r
1167 ======================
\r
1170 void CA_LoadAllSounds (void)
\r
1174 switch (oldsoundmode)
\r
1179 start = STARTPCSOUNDS;
\r
1182 start = STARTADLIBSOUNDS;
\r
1186 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1187 if (audiosegs[start])
\r
1188 MM_SetPurge (&(memptr)audiosegs[start],3); // make purgable
\r
1192 switch (SoundMode)
\r
1197 start = STARTPCSOUNDS;
\r
1200 start = STARTADLIBSOUNDS;
\r
1204 for (i=0;i<NUMSOUNDS;i++,start++)
\r
1205 CA_CacheAudioChunk (start);
\r
1207 oldsoundmode = SoundMode;
\r
1210 //===========================================================================
\r
1212 #if GRMODE == EGAGR
\r
1215 ======================
\r
1219 = Make a shifted (one byte wider) copy of a sprite into another area
\r
1221 ======================
\r
1224 unsigned static sheight,swidth;
\r
1225 boolean static dothemask;
\r
1227 void CAL_ShiftSprite (unsigned segment,unsigned source,unsigned dest,
\r
1228 unsigned width, unsigned height, unsigned pixshift, boolean domask)
\r
1231 sheight = height; // because we are going to reassign bp
\r
1233 dothemask = domask;
\r
1235 asm mov ax,[segment]
\r
1236 asm mov ds,ax // source and dest are in same segment, and all local
\r
1238 asm mov bx,[source]
\r
1241 asm mov bp,[pixshift]
\r
1243 asm mov bp,WORD PTR [shifttabletable+bp] // bp holds pointer to shift table
\r
1245 asm cmp [ss:dothemask],0
\r
1249 // table shift the mask
\r
1251 asm mov dx,[ss:sheight]
\r
1255 asm mov BYTE PTR [di],255 // 0xff first byte
\r
1256 asm mov cx,ss:[swidth]
\r
1260 asm mov al,[bx] // source
\r
1262 asm inc bx // next source byte
\r
1266 asm mov ax,[bp+si] // table shift into two bytes
\r
1268 asm and [di],al // and with first byte
\r
1270 asm mov [di],ah // replace next byte
\r
1272 asm loop domaskbyte
\r
1274 asm inc di // the last shifted byte has 1s in it
\r
1281 // table shift the data
\r
1283 asm mov dx,ss:[sheight]
\r
1285 asm shl dx,1 // four planes of data
\r
1289 asm mov BYTE PTR [di],0 // 0 first byte
\r
1290 asm mov cx,ss:[swidth]
\r
1294 asm mov al,[bx] // source
\r
1295 asm inc bx // next source byte
\r
1299 asm mov ax,[bp+si] // table shift into two bytes
\r
1300 asm or [di],al // or with first byte
\r
1302 asm mov [di],ah // replace next byte
\r
1304 asm loop dodatabyte
\r
1306 asm inc di // the last shifted byte has 0s in it
\r
1314 asm mov ax,ss // restore data segment
\r
1321 //===========================================================================
\r
1324 ======================
\r
1328 = Generate shifts and set up sprite structure for a given sprite
\r
1330 ======================
\r
1333 void CAL_CacheSprite (int chunk, byte far *compressed)
\r
1336 unsigned shiftstarts[5];
\r
1337 unsigned smallplane,bigplane,expanded;
\r
1338 spritetabletype far *spr;
\r
1339 spritetype _seg *dest;
\r
1341 #if GRMODE == CGAGR
\r
1343 // CGA has no pel panning, so shifts are never needed
\r
1345 spr = &spritetable[chunk-STARTSPRITES];
\r
1346 smallplane = spr->width*spr->height;
\r
1347 MM_GetPtr (&grsegs[chunk],smallplane*2+MAXSHIFTS*6);
\r
1350 dest = (spritetype _seg *)grsegs[chunk];
\r
1351 dest->sourceoffset[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1352 dest->planesize[0] = smallplane;
\r
1353 dest->width[0] = spr->width;
\r
1356 // expand the unshifted shape
\r
1358 CAL_HuffExpand (compressed, &dest->data[0],smallplane*2,grhuffman);
\r
1363 #if GRMODE == EGAGR
\r
1366 // calculate sizes
\r
1368 spr = &spritetable[chunk-STARTSPRITES];
\r
1369 smallplane = spr->width*spr->height;
\r
1370 bigplane = (spr->width+1)*spr->height;
\r
1372 shiftstarts[0] = MAXSHIFTS*6; // start data after 3 unsigned tables
\r
1373 shiftstarts[1] = shiftstarts[0] + smallplane*5; // 5 planes in a sprite
\r
1374 shiftstarts[2] = shiftstarts[1] + bigplane*5;
\r
1375 shiftstarts[3] = shiftstarts[2] + bigplane*5;
\r
1376 shiftstarts[4] = shiftstarts[3] + bigplane*5; // nothing ever put here
\r
1378 expanded = shiftstarts[spr->shifts];
\r
1379 MM_GetPtr (&grsegs[chunk],expanded);
\r
1382 dest = (spritetype _seg *)grsegs[chunk];
\r
1385 // expand the unshifted shape
\r
1387 CAL_HuffExpand (compressed, &dest->data[0],smallplane*5,grhuffman);
\r
1390 // make the shifts!
\r
1392 switch (spr->shifts)
\r
1397 dest->sourceoffset[i] = shiftstarts[0];
\r
1398 dest->planesize[i] = smallplane;
\r
1399 dest->width[i] = spr->width;
\r
1406 dest->sourceoffset[i] = shiftstarts[0];
\r
1407 dest->planesize[i] = smallplane;
\r
1408 dest->width[i] = spr->width;
\r
1412 dest->sourceoffset[i] = shiftstarts[1];
\r
1413 dest->planesize[i] = bigplane;
\r
1414 dest->width[i] = spr->width+1;
\r
1416 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1417 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1421 dest->sourceoffset[0] = shiftstarts[0];
\r
1422 dest->planesize[0] = smallplane;
\r
1423 dest->width[0] = spr->width;
\r
1425 dest->sourceoffset[1] = shiftstarts[1];
\r
1426 dest->planesize[1] = bigplane;
\r
1427 dest->width[1] = spr->width+1;
\r
1428 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1429 dest->sourceoffset[1],spr->width,spr->height,2,true);
\r
1431 dest->sourceoffset[2] = shiftstarts[2];
\r
1432 dest->planesize[2] = bigplane;
\r
1433 dest->width[2] = spr->width+1;
\r
1434 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1435 dest->sourceoffset[2],spr->width,spr->height,4,true);
\r
1437 dest->sourceoffset[3] = shiftstarts[3];
\r
1438 dest->planesize[3] = bigplane;
\r
1439 dest->width[3] = spr->width+1;
\r
1440 CAL_ShiftSprite ((unsigned)grsegs[chunk],dest->sourceoffset[0],
\r
1441 dest->sourceoffset[3],spr->width,spr->height,6,true);
\r
1446 Quit ("CAL_CacheSprite: Bad shifts number!");
\r
1452 //===========================================================================
\r
1456 ======================
\r
1458 = CAL_ExpandGrChunk
\r
1460 = Does whatever is needed with a pointer to a compressed chunk
\r
1462 ======================
\r
1465 void CAL_ExpandGrChunk (int chunk, byte far *source)
\r
1470 if (chunk >= STARTTILE8 && chunk < STARTEXTERNS)
\r
1473 // expanded sizes of tile8/16/32 are implicit
\r
1476 #if GRMODE == EGAGR
\r
1478 #define MASKBLOCK 40
\r
1481 #if GRMODE == CGAGR
\r
1483 #define MASKBLOCK 32
\r
1486 if (chunk<STARTTILE8M) // tile 8s are all in one chunk!
\r
1487 expanded = BLOCK*NUMTILE8;
\r
1488 else if (chunk<STARTTILE16)
\r
1489 expanded = MASKBLOCK*NUMTILE8M;
\r
1490 else if (chunk<STARTTILE16M) // all other tiles are one/chunk
\r
1491 expanded = BLOCK*4;
\r
1492 else if (chunk<STARTTILE32)
\r
1493 expanded = MASKBLOCK*4;
\r
1494 else if (chunk<STARTTILE32M)
\r
1495 expanded = BLOCK*16;
\r
1497 expanded = MASKBLOCK*16;
\r
1502 // everything else has an explicit size longword
\r
1504 expanded = *(long far *)source;
\r
1505 source += 4; // skip over length
\r
1509 // allocate final space, decompress it, and free bigbuffer
\r
1510 // Sprites need to have shifts made and various other junk
\r
1512 if (chunk>=STARTSPRITES && chunk< STARTTILE8)
\r
1513 CAL_CacheSprite(chunk,source);
\r
1516 MM_GetPtr (&grsegs[chunk],expanded);
\r
1519 CAL_HuffExpand (source,grsegs[chunk],expanded,grhuffman);
\r
1525 ======================
\r
1529 = Gets a chunk off disk, optimizing reads to general buffer
\r
1531 ======================
\r
1534 void CAL_ReadGrChunk (int chunk)
\r
1536 long pos,compressed;
\r
1537 memptr bigbufferseg;
\r
1542 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1543 // a larger buffer
\r
1545 pos = GRFILEPOS(chunk);
\r
1546 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1550 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1553 compressed = GRFILEPOS(next)-pos;
\r
1555 lseek(grhandle,pos,SEEK_SET);
\r
1557 if (compressed<=BUFFERSIZE)
\r
1559 CA_FarRead(grhandle,bufferseg,compressed);
\r
1560 source = bufferseg;
\r
1564 MM_GetPtr(&bigbufferseg,compressed);
\r
1567 MM_SetLock (&bigbufferseg,true);
\r
1568 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1569 source = bigbufferseg;
\r
1572 CAL_ExpandGrChunk (chunk,source);
\r
1574 if (compressed>BUFFERSIZE)
\r
1575 MM_FreePtr(&bigbufferseg);
\r
1579 ======================
\r
1583 = Makes sure a given chunk is in memory, loadiing it if needed
\r
1585 ======================
\r
1588 void CA_CacheGrChunk (int chunk)
\r
1590 long pos,compressed;
\r
1591 memptr bigbufferseg;
\r
1595 grneeded[chunk] |= ca_levelbit; // make sure it doesn't get removed
\r
1596 if (grsegs[chunk])
\r
1598 MM_SetPurge (&grsegs[chunk],0);
\r
1599 return; // allready in memory
\r
1602 // MDM begin - (GAMERS EDGE)
\r
1604 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
1605 Quit("CA_CacheGrChunk(): Can't find graphics files.");
\r
1610 // load the chunk into a buffer, either the miscbuffer if it fits, or allocate
\r
1611 // a larger buffer
\r
1613 pos = GRFILEPOS(chunk);
\r
1614 if (pos<0) // $FFFFFFFF start is a sparse tile
\r
1618 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
1621 compressed = GRFILEPOS(next)-pos;
\r
1623 lseek(grhandle,pos,SEEK_SET);
\r
1625 if (compressed<=BUFFERSIZE)
\r
1627 CA_FarRead(grhandle,bufferseg,compressed);
\r
1628 source = bufferseg;
\r
1632 MM_GetPtr(&bigbufferseg,compressed);
\r
1633 MM_SetLock (&bigbufferseg,true);
\r
1634 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
1635 source = bigbufferseg;
\r
1638 CAL_ExpandGrChunk (chunk,source);
\r
1640 if (compressed>BUFFERSIZE)
\r
1641 MM_FreePtr(&bigbufferseg);
\r
1646 //==========================================================================
\r
1649 ======================
\r
1653 ======================
\r
1656 void CA_CacheMap (int mapnum)
\r
1658 long pos,compressed;
\r
1660 memptr *dest,bigbufferseg;
\r
1662 unsigned far *source;
\r
1663 #ifdef MAPHEADERLINKED
\r
1664 memptr buffer2seg;
\r
1669 // MDM begin - (GAMERS EDGE)
\r
1671 if (!FindFile("GAMEMAPS."EXT,NULL,1))
\r
1672 Quit("CA_CacheMap(): Can't find level files.");
\r
1678 // free up memory from last map
\r
1680 if (mapon>-1 && mapheaderseg[mapon])
\r
1681 MM_SetPurge (&(memptr)mapheaderseg[mapon],3);
\r
1682 for (plane=0;plane<MAPPLANES;plane++)
\r
1683 if (mapsegs[plane])
\r
1684 MM_FreePtr (&(memptr)mapsegs[plane]);
\r
1690 // load map header
\r
1691 // The header will be cached if it is still around
\r
1693 if (!mapheaderseg[mapnum])
\r
1695 pos = ((mapfiletype _seg *)tinf)->headeroffsets[mapnum];
\r
1696 if (pos<0) // $FFFFFFFF start is a sparse map
\r
1697 Quit ("CA_CacheMap: Tried to load a non existent map!");
\r
1699 MM_GetPtr(&(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1700 lseek(maphandle,pos,SEEK_SET);
\r
1701 CA_FarRead (maphandle,(memptr)mapheaderseg[mapnum],sizeof(maptype));
\r
1704 MM_SetPurge (&(memptr)mapheaderseg[mapnum],0);
\r
1707 // load the planes in
\r
1708 // If a plane's pointer still exists it will be overwritten (levels are
\r
1709 // allways reloaded, never cached)
\r
1712 size = mapheaderseg[mapnum]->width * mapheaderseg[mapnum]->height * 2;
\r
1714 for (plane = 0; plane<MAPPLANES; plane++)
\r
1716 pos = mapheaderseg[mapnum]->planestart[plane];
\r
1717 compressed = mapheaderseg[mapnum]->planelength[plane];
\r
1720 continue; // the plane is not used in this game
\r
1722 dest = &(memptr)mapsegs[plane];
\r
1723 MM_GetPtr(dest,size);
\r
1725 lseek(maphandle,pos,SEEK_SET);
\r
1726 if (compressed<=BUFFERSIZE)
\r
1727 source = bufferseg;
\r
1730 MM_GetPtr(&bigbufferseg,compressed);
\r
1731 MM_SetLock (&bigbufferseg,true);
\r
1732 source = bigbufferseg;
\r
1735 CA_FarRead(maphandle,(byte far *)source,compressed);
\r
1736 #ifdef MAPHEADERLINKED
\r
1738 // unhuffman, then unRLEW
\r
1739 // The huffman'd chunk has a two byte expanded length first
\r
1740 // The resulting RLEW chunk also does, even though it's not really
\r
1743 expanded = *source;
\r
1745 MM_GetPtr (&buffer2seg,expanded);
\r
1746 CAL_CarmackExpand (source, (unsigned far *)buffer2seg,expanded);
\r
1747 CA_RLEWexpand (((unsigned far *)buffer2seg)+1,*dest,size,
\r
1748 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1749 MM_FreePtr (&buffer2seg);
\r
1753 // unRLEW, skipping expanded length
\r
1755 CA_RLEWexpand (source+1, *dest,size,
\r
1756 ((mapfiletype _seg *)tinf)->RLEWtag);
\r
1759 if (compressed>BUFFERSIZE)
\r
1760 MM_FreePtr(&bigbufferseg);
\r
1764 //===========================================================================
\r
1767 ======================
\r
1771 = Goes up a bit level in the needed lists and clears it out.
\r
1772 = Everything is made purgable
\r
1774 ======================
\r
1777 void CA_UpLevel (void)
\r
1779 if (ca_levelnum==7)
\r
1780 Quit ("CA_UpLevel: Up past level 7!");
\r
1786 //===========================================================================
\r
1789 ======================
\r
1793 = Goes down a bit level in the needed lists and recaches
\r
1794 = everything from the lower level
\r
1796 ======================
\r
1799 void CA_DownLevel (void)
\r
1802 Quit ("CA_DownLevel: Down past level 0!");
\r
1805 CA_CacheMarks(NULL);
\r
1808 //===========================================================================
\r
1811 ======================
\r
1815 = Clears out all the marks at the current level
\r
1817 ======================
\r
1820 void CA_ClearMarks (void)
\r
1824 for (i=0;i<NUMCHUNKS;i++)
\r
1825 grneeded[i]&=~ca_levelbit;
\r
1829 //===========================================================================
\r
1832 ======================
\r
1834 = CA_ClearAllMarks
\r
1836 = Clears out all the marks on all the levels
\r
1838 ======================
\r
1841 void CA_ClearAllMarks (void)
\r
1843 _fmemset (grneeded,0,sizeof(grneeded));
\r
1849 //===========================================================================
\r
1852 ======================
\r
1856 ======================
\r
1859 void CA_FreeGraphics (void)
\r
1863 for (i=0;i<NUMCHUNKS;i++)
\r
1865 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1870 ======================
\r
1874 = Make everything possible purgable
\r
1876 ======================
\r
1879 void CA_SetAllPurge (void)
\r
1886 // free cursor sprite and background save
\r
1891 // free map headers and map planes
\r
1893 for (i=0;i<NUMMAPS;i++)
\r
1894 if (mapheaderseg[i])
\r
1895 MM_SetPurge (&(memptr)mapheaderseg[i],3);
\r
1899 MM_FreePtr (&(memptr)mapsegs[i]);
\r
1904 for (i=0;i<NUMSNDCHUNKS;i++)
\r
1906 MM_SetPurge (&(memptr)audiosegs[i],3);
\r
1911 CA_FreeGraphics ();
\r
1915 void CA_SetGrPurge (void)
\r
1922 for (i=0;i<NUMCHUNKS;i++)
\r
1924 MM_SetPurge (&(memptr)grsegs[i],3);
\r
1928 //===========================================================================
\r
1932 ======================
\r
1936 ======================
\r
1939 #define NUMBARS (17l*8)
\r
1942 unsigned thx,thy,lastx;
\r
1943 long barx,barstep;
\r
1945 void CAL_DialogDraw (char *title,unsigned numcache)
\r
1947 unsigned homex,homey,x;
\r
1949 barstep = (NUMBARS<<16)/numcache;
\r
1952 // draw dialog window (masked tiles 12 - 20 are window borders)
\r
1954 US_CenterWindow (20,8);
\r
1958 US_CPrint ("Loading");
\r
1959 fontcolor = F_SECONDCOLOR;
\r
1960 US_CPrint (title);
\r
1961 fontcolor = F_BLACK;
\r
1964 // draw thermometer bar
\r
1968 VWB_DrawTile8(thx,thy,0); // CAT3D numbers
\r
1969 VWB_DrawTile8(thx,thy+8,3);
\r
1970 VWB_DrawTile8(thx,thy+16,6);
\r
1971 VWB_DrawTile8(thx+17*8,thy,2);
\r
1972 VWB_DrawTile8(thx+17*8,thy+8,5);
\r
1973 VWB_DrawTile8(thx+17*8,thy+16,8);
\r
1974 for (x=thx+8;x<thx+17*8;x+=8)
\r
1976 VWB_DrawTile8(x,thy,1);
\r
1977 VWB_DrawTile8(x,thy+8,4);
\r
1978 VWB_DrawTile8(x,thy+16,7);
\r
1981 thx += 4; // first line location
\r
1983 barx = (long)thx<<16;
\r
1986 VW_UpdateScreen();
\r
1991 ======================
\r
1993 = CAL_DialogUpdate
\r
1995 ======================
\r
1998 void CAL_DialogUpdate (void)
\r
2004 if (xh - lastx > BARSTEP)
\r
2006 for (x=lastx;x<=xh;x++)
\r
2007 #if GRMODE == EGAGR
\r
2008 VWB_Vlin (thy,thy+13,x,14);
\r
2010 #if GRMODE == CGAGR
\r
2011 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2014 VW_UpdateScreen();
\r
2019 ======================
\r
2021 = CAL_DialogFinish
\r
2023 ======================
\r
2026 void CAL_DialogFinish (void)
\r
2030 xh = thx + NUMBARS;
\r
2031 for (x=lastx;x<=xh;x++)
\r
2032 #if GRMODE == EGAGR
\r
2033 VWB_Vlin (thy,thy+13,x,14);
\r
2035 #if GRMODE == CGAGR
\r
2036 VWB_Vlin (thy,thy+13,x,SECONDCOLOR);
\r
2038 VW_UpdateScreen();
\r
2042 //===========================================================================
\r
2045 ======================
\r
2049 ======================
\r
2051 #define MAXEMPTYREAD 1024
\r
2053 void CA_CacheMarks (char *title)
\r
2056 int i,next,numcache;
\r
2057 long pos,endpos,nextpos,nextendpos,compressed;
\r
2058 long bufferstart,bufferend; // file position of general buffer
\r
2060 memptr bigbufferseg;
\r
2062 dialog = (title!=NULL);
\r
2066 // go through and make everything not needed purgable
\r
2068 for (i=0;i<NUMCHUNKS;i++)
\r
2069 if (grneeded[i]&ca_levelbit)
\r
2071 if (grsegs[i]) // its allready in memory, make
\r
2072 MM_SetPurge(&grsegs[i],0); // sure it stays there!
\r
2078 if (grsegs[i]) // not needed, so make it purgeable
\r
2079 MM_SetPurge(&grsegs[i],3);
\r
2082 if (!numcache) // nothing to cache!
\r
2085 // MDM begin - (GAMERS EDGE)
\r
2087 if (!FindFile("EGAGRAPH."EXT,NULL,2))
\r
2088 Quit("CA_CacheMarks(): Can't find graphics files.");
\r
2095 write(profilehandle,title,strlen(title));
\r
2096 write(profilehandle,"\n",1);
\r
2099 drawcachebox(title,numcache);
\r
2103 // go through and load in anything still needed
\r
2105 bufferstart = bufferend = 0; // nothing good in buffer now
\r
2107 for (i=0;i<NUMCHUNKS;i++)
\r
2108 if ( (grneeded[i]&ca_levelbit) && !grsegs[i])
\r
2111 // update thermometer
\r
2113 if (dialog && updatecachebox)
\r
2114 updatecachebox ();
\r
2116 pos = GRFILEPOS(i);
\r
2121 while (GRFILEPOS(next) == -1) // skip past any sparse tiles
\r
2124 compressed = GRFILEPOS(next)-pos;
\r
2125 endpos = pos+compressed;
\r
2127 if (compressed<=BUFFERSIZE)
\r
2129 if (bufferstart<=pos
\r
2130 && bufferend>= endpos)
\r
2132 // data is allready in buffer
\r
2133 source = (byte _seg *)bufferseg+(pos-bufferstart);
\r
2137 // load buffer with a new block from disk
\r
2138 // try to get as many of the needed blocks in as possible
\r
2139 while ( next < NUMCHUNKS )
\r
2141 while (next < NUMCHUNKS &&
\r
2142 !(grneeded[next]&ca_levelbit && !grsegs[next]))
\r
2144 if (next == NUMCHUNKS)
\r
2147 nextpos = GRFILEPOS(next);
\r
2148 while (GRFILEPOS(++next) == -1) // skip past any sparse tiles
\r
2150 nextendpos = GRFILEPOS(next);
\r
2151 if (nextpos - endpos <= MAXEMPTYREAD
\r
2152 && nextendpos-pos <= BUFFERSIZE)
\r
2153 endpos = nextendpos;
\r
2155 next = NUMCHUNKS; // read pos to posend
\r
2158 lseek(grhandle,pos,SEEK_SET);
\r
2159 CA_FarRead(grhandle,bufferseg,endpos-pos);
\r
2160 bufferstart = pos;
\r
2161 bufferend = endpos;
\r
2162 source = bufferseg;
\r
2167 // big chunk, allocate temporary buffer
\r
2168 MM_GetPtr(&bigbufferseg,compressed);
\r
2171 MM_SetLock (&bigbufferseg,true);
\r
2172 lseek(grhandle,pos,SEEK_SET);
\r
2173 CA_FarRead(grhandle,bigbufferseg,compressed);
\r
2174 source = bigbufferseg;
\r
2177 CAL_ExpandGrChunk (i,source);
\r
2181 if (compressed>BUFFERSIZE)
\r
2182 MM_FreePtr(&bigbufferseg);
\r
2187 // finish up any thermometer remnants
\r
2189 if (dialog && finishcachebox)
\r