693 lines
16 KiB
C
693 lines
16 KiB
C
/***************************************************************************/
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/* */
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/* */
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/* Raven 3D Engine */
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/* Copyright (C) 1996 by Softdisk Publishing */
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/* */
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/* Original Design: */
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/* John Carmack of id Software */
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/* */
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/* Enhancements by: */
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/* Robert Morgan of Channel 7............................Main Engine Code */
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/* Todd Lewis of Softdisk Publishing......Tools,Utilities,Special Effects */
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/* John Bianca of Softdisk Publishing..............Low-level Optimization */
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/* Carlos Hasan..........................................Music/Sound Code */
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/* */
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/* */
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/***************************************************************************/
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#include <DOS.H>
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#include <I86.H>
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#include <STRING.H>
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#include <CONIO.H>
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#include <STDIO.H>
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#include <IO.H>
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#include <STDLIB.H>
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#include "d_global.h"
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#include "d_video.h"
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#include "d_ints.h"
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#include "d_misc.h"
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#include "timer.h"
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#include "audio.h"
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#include "protos.h"
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#include "r_refdef.h"
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#include "d_disk.h"
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#include "svrdos4g.h"
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/**** CONSTANTS ****/
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#define TIMERINT 8
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#define KEYBOARDINT 9
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#define VBLCOUNTER 16000
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#define MOUSEINT 0x33
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#define MOUSESENSE SC.mousesensitivity
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#define JOYPORT 0x201
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#define MOUSESIZE 16
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/**** VARIABLES ****/
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void (interrupt *oldkeyboardisr)();
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void (*timerhook)(); // called every other frame (player)
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boolean timeractive;
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longint timecount; // current time index
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boolean keyboard[NUMCODES]; // keyboard flags
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boolean pause, capslock, newascii;
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boolean mouseinstalled, joyinstalled;
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int in_button[NUMBUTTONS]; // frames the button has been down
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byte lastscan;
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char lastascii;
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/* mouse data */
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short mdx, mdy, b1, b2;
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int hiding=1, busy=1; /* internal flags */
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int mousex=160, mousey=100;
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byte back[MOUSESIZE*MOUSESIZE]; /* background for mouse */
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byte fore[MOUSESIZE*MOUSESIZE]; /* mouse foreground */
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/* joystick data */
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int jx, jy, jdx, jdy, j1, j2;
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word jcenx, jceny, xsense, ysense;
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/* config data */
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extern SoundCard SC;
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byte ASCIINames[] = // Unshifted ASCII for scan codes
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{
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0 ,27 ,'1','2','3','4','5','6','7','8','9','0','-','=',8 ,9 ,
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'q','w','e','r','t','y','u','i','o','p','[',']',13 ,0 ,'a','s',
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'd','f','g','h','j','k','l',';',39 ,'`',0 ,92 ,'z','x','c','v',
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'b','n','m',',','.','/',0 ,'*',0 ,' ',0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,'-',0 ,0 ,0 ,'+',0 ,
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0 ,0 ,0 ,127,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
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};
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byte ShiftNames[] = // Shifted ASCII for scan codes
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{
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0 ,27 ,'!','@','#','$','%','^','&','*','(',')','_','+',8 ,9 ,
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'Q','W','E','R','T','Y','U','I','O','P','{','}',13 ,0 ,'A','S',
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'D','F','G','H','J','K','L',':',34 ,'~',0 ,'|','Z','X','C','V',
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'B','N','M','<','>','?',0 ,'*',0 ,' ',0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,'-',0 ,0 ,0 ,'+',0 ,
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0 ,0 ,0 ,127,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
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};
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byte SpecialNames[] = // ASCII for 0xe0 prefixed codes
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{
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,13 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,'/',0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,
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0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0 ,0
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};
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int scanbuttons[NUMBUTTONS] =
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{
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SC_UPARROW, // bt_north
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SC_RIGHTARROW, // bt_east
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SC_DOWNARROW, // bt_south
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SC_LEFTARROW, // bt_west
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SC_CONTROL, // bt_fire
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SC_ALT, // bt_straf
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SC_SPACE, // bt_use
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SC_LSHIFT, // bt_run
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SC_Z, // bt_jump
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SC_X, // bt_useitem
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SC_A, // bt_asscam
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SC_PGUP, // bt_lookup
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SC_PGDN, // bt_lookdown
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SC_HOME, // bt_centerview
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SC_COMMA, // bt_slideleft
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SC_PERIOD, // bt_slideright
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SC_INSERT, // bt_invleft
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SC_DELETE, // bt_invright
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};
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/**** FUNCTIONS ****/
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void interrupt INT_KeyboardISR()
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/* keyboard interrupt
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processes make/break codes
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sets key flags accordingly */
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{
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static boolean special;
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byte k, c, al;
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// Get the scan code
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k=inbyte(0x60);
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if (k==0xE0) special=true;
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else if (k==0xE1) pause^=true;
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else
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{
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if (special && (k==0x2A || k==0xAA || k==0xAA || k==0x36))
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{
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special=false;
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goto end;
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}
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if (k & 0x80) // Break code
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{
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k&=0x7F;
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keyboard[k]=false;
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}
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else // Make code
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{
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lastscan=k;
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keyboard[k]=true;
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if (special) c=SpecialNames[k];
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else
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{
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if (k==SC_CAPSLOCK) capslock^=true;
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if (keyboard[SC_LSHIFT] || keyboard[SC_RSHIFT])
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{
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c=ShiftNames[k];
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if (capslock && c>='A' && c<='Z') c+='a'-'A';
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}
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else
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{
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c=ASCIINames[k];
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if (capslock && c>='a' && c<='z') c-='a'-'A';
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}
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}
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if (c) // return a new ascii character
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{
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lastascii=c;
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newascii=true;
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}
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}
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special=false;
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}
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end:
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// acknowledge the interrupt
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al=inbyte(0x61);
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al|=0x80;
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outbyte(0x61,al);
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al&=0x7F;
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outbyte(0x61,al);
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outbyte(0x20,0x20);
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}
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void INT_ReadControls(void)
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/* read in input controls */
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{
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int i, c, k, jx, jy;
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memset(in_button,0,sizeof(in_button));
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for(i=0;i<NUMBUTTONS;i++)
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if (keyboard[scanbuttons[i]])
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in_button[i]=1;
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if (mouseinstalled)
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{
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if (mdx>=MOUSESENSE)
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{
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in_button[bt_east]=2;
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mdx-=MOUSESENSE;
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}
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else if (mdx<=-MOUSESENSE)
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{
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in_button[bt_west]=2;
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mdx+=MOUSESENSE;
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}
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if (mdy>=MOUSESENSE)
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{
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in_button[bt_south]=2;
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mdy-=MOUSESENSE;
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}
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else if (mdy<=-MOUSESENSE)
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{
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in_button[bt_north]=2;
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mdy+=MOUSESENSE;
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}
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/* if (mdx>0)
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in_button[bt_east]=2;
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else if (mdx<0)
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in_button[bt_west]=2;
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if (mdy>0)
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in_button[bt_south]=2;
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else if (mdx<0)
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in_button[bt_north]=2;
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mdx=0;
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mdy=0; */
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if (b1) in_button[SC.leftbutton]=2;
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if (b2) in_button[SC.rightbutton]=2;
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}
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if (joyinstalled)
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{
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_disable();
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outp(JOYPORT,0xff);
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c=inp(JOYPORT);
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j1=((c&16)>>4)^1;
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j2=((c&32)>>5)^1;
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for (k=0;c&3;k++)
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{
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if (c&1) jx=k;
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if (c&2) jy=k;
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c=inp(JOYPORT);
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}
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_enable();
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jx-=jcenx;
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jy-=jceny;
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if (jx>xsense)
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jx-=xsense; // remove trash results
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else if (jx<-xsense)
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jx+=xsense;
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else
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jx=0;
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if (jy>ysense)
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jy-=ysense;
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else if (jy<-ysense)
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jy+=ysense;
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else
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jy=0;
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if (jx>0)
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in_button[bt_east]=3;
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else if (jx<0)
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in_button[bt_west]=3;
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if (jy>0)
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in_button[bt_south]=3;
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else if (jy<0)
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in_button[bt_north]=3;
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if (j1)
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in_button[SC.joybut1]=3;
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if (j2)
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in_button[SC.joybut2]=3;
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}
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}
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/*============================================================================*/
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void INT_TimerISR(void)
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/* process each timer tick */
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{
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timecount++; // increment timing variables
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if (MusicPresent) dPoll(); // have to poll a lot!
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if ((timecount&1) && timerhook) timerhook();
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if (MusicPresent) dPoll(); // have to poll a lot!
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}
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void INT_TimerHook(void(* hook)(void))
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{
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timerhook=hook;
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}
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void KBstub()
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{
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}
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/*============================================================================*/
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void J_GetJoyInfo(word *x,word *y)
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{
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byte c;
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int k;
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_disable();
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outp(JOYPORT,0xff);
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c=inp(JOYPORT);
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j1=((c&16)>>4)^1;
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j2=((c&32)>>5)^1;
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for (k=0;c&3;k++)
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{
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if (c&1) *x=k;
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if (c&2) *y=k;
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c=inp(JOYPORT);
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}
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_enable();
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}
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void J_GetButtons(void)
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{
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int b;
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outp(JOYPORT,0);
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b=-inp(JOYPORT);
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j1=b&0x10;
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j2=b&0x20;
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}
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boolean J_Detect(void)
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{
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union REGS r;
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r.h.ah=0x84;
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r.w.dx=0x01;
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int386(0x15,&r,&r);
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if (r.w.cflag || r.w.ax==0 || r.w.bx==0) return false;
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return true;
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}
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void J_Calibrate(void)
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{
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word x1, y1, x2, y2, a, b;
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xsense=SC.xsense;
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ysense=SC.ysense;
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jcenx=SC.jcenx;
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jceny=SC.jceny;
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printf("\tMove joystick to upper-left and press a button (ESC=continue)");
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newascii=false;
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do
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{
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J_GetJoyInfo(&x1,&y1);
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if (newascii && lastascii==27)
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{
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newascii=false;
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printf("\n");
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return;
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}
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} while (!j1 && !j2);
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printf("\n");
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do
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{
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J_GetJoyInfo(&a,&b); // wait for button release
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if (newascii && lastascii==27)
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{
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newascii=false;
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printf("\n");
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return;
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}
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} while (j1 || j2);
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printf("\tMove joystick to lower-right and press a button");
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do
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{
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J_GetJoyInfo(&x2,&y2);
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if (newascii && lastascii==27)
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{
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newascii=false;
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printf("\n");
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return;
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}
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} while (!j1 && !j2);
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printf("\n");
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do
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{
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J_GetJoyInfo(&a,&b); // wait for button release
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if (newascii && lastascii==27)
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{
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newascii=false;
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printf("\n");
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return;
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}
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} while (j1 || j2);
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printf("\tCenter the joystick and press a button");
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do
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{
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J_GetJoyInfo(&jcenx,&jceny);
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if (newascii && lastascii==27)
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{
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newascii=false;
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printf("\n");
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return;
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}
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} while (!j1 && !j2);
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printf("\n");
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xsense=(y2-y1)/7;
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ysense=(x2-x1)/7;
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SC.xsense=xsense;
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SC.ysense=ysense;
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SC.jcenx=jcenx;
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SC.jceny=jceny;
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}
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void J_Init(void)
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{
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if (!SC.joystick) return;
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printf("Joystick: ");
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if (!J_Detect())
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{
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printf("Joystick Not Found\n");
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return;
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}
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joyinstalled=true;
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printf("Found\n");
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J_Calibrate();
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}
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/*============================================================================*/
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void UpdateMouse(void)
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{
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union REGS r;
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static int count=0;
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if (mouseinstalled)
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{
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r.w.ax=0x0B;
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int386(MOUSEINT,&r,&r);
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if (r.w.cx==0 && r.w.dx==0)
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{
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++count;
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if (count==45)
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{
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mdx=0;
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mdy=0;
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}
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}
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else
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count=0;
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mdx+=r.w.cx;
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mdy+=r.w.dx;
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r.w.ax=0x03;
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r.w.bx=7;
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int386(MOUSEINT,&r,&r);
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b1=r.w.bx&1;
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b2=r.w.bx&2;
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}
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}
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int MouseGetClick(short *x,short *y)
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{
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union REGS r;
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if (!mouseinstalled) return false;
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r.w.ax=0x06;
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r.w.bx=0;
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int386(MOUSEINT,&r,&r);
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*x=r.w.cx>>1;
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*y=r.w.dx;
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return r.w.bx&1;
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}
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void _loadds far MouseMove(int x,int y)
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#pragma aux MouseMove parm [ecx] [edx]
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{
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int i, j, w, h, x1, y1;
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byte *bp, *tg;
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CLI;
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x1=x>>1;
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y1=y;
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if (busy)
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{
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STI;
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return;
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}
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if (hiding!=0)
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{
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mousex=x1;
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mousey=y1;
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STI;
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return;
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}
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busy=1;
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STI;
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w=MOUSESIZE;
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h=MOUSESIZE;
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if (mousex>319-MOUSESIZE) w=320-mousex;
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if (mousey>199-MOUSESIZE) h=200-mousey;
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for(i=0;i<h;i++)
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{
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bp=&back[i*16];
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tg=ylookup[mousey+i]+mousex;
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for(j=0;j<w;j++,bp++,tg++)
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*tg=*bp;
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}
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mousex=x1;
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mousey=y1;
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w=MOUSESIZE;
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h=MOUSESIZE;
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if (mousex>319-MOUSESIZE) w=320-mousex;
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if (mousey>199-MOUSESIZE) h=200-mousey;
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for(i=0;i<h;i++)
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{
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bp=&back[i*16];
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tg=ylookup[mousey+i]+mousex;
|
|
for(j=0;j<w;j++,bp++,tg++)
|
|
*bp=*tg;
|
|
}
|
|
for(i=0;i<h;i++)
|
|
{
|
|
bp=&fore[i*16];
|
|
tg=ylookup[mousey+i]+mousex;
|
|
for(j=0;j<w;j++,bp++,tg++)
|
|
if (*bp!=255)
|
|
*tg=*bp;
|
|
}
|
|
busy=0;
|
|
}
|
|
|
|
|
|
void ResetMouse(void)
|
|
{
|
|
union REGS r;
|
|
|
|
if (!mouseinstalled) return;
|
|
mdx=0;
|
|
mdy=0;
|
|
b1=0;
|
|
b2=0;
|
|
r.w.ax=0x0B;
|
|
int386(MOUSEINT,&r,&r);
|
|
}
|
|
|
|
|
|
void M_Init(void)
|
|
{
|
|
union REGS r;
|
|
struct SREGS s;
|
|
int lump;
|
|
|
|
if (!SC.mouse) return;
|
|
printf("Mouse: ");
|
|
segread(&s);
|
|
r.w.ax=0x00;
|
|
int386(MOUSEINT,&r,&r);
|
|
if (r.w.ax==0xFFFF)
|
|
{
|
|
mouseinstalled=true;
|
|
printf("Found\n");
|
|
}
|
|
else
|
|
{
|
|
mouseinstalled=false;
|
|
printf("Mouse Not Found\n");
|
|
return;
|
|
}
|
|
busy=0;
|
|
r.w.ax=0x600; /* DPMI Lock Linear Region */
|
|
r.w.bx=FP_SEG(MouseMove); /* Linear address in BX:CX */
|
|
r.w.cx=FP_OFF(MouseMove);
|
|
r.w.si=0; /* Length in SI:DI */
|
|
r.w.di=512;
|
|
int386(0x31,&r,&r);
|
|
r.x.ecx=1;
|
|
s.es=FP_SEG(MouseMove);
|
|
s.ds=0;
|
|
r.x.edx=FP_OFF(MouseMove);
|
|
r.x.eax=0x0C;
|
|
int386x(MOUSEINT,&r,&r,&s);
|
|
lock_region(fore,256);
|
|
lock_region(back,256);
|
|
lock_region(ylookup,sizeof(ylookup));
|
|
lump=CA_GetNamedNum("MCURSOR");
|
|
lseek(cachehandle,infotable[lump].filepos+8,SEEK_SET);
|
|
read(cachehandle,fore,MOUSESIZE*MOUSESIZE);
|
|
}
|
|
|
|
|
|
void M_Shutdown(void)
|
|
{
|
|
union REGS r;
|
|
|
|
r.w.ax=0x00;
|
|
int386(MOUSEINT,&r,&r);
|
|
}
|
|
|
|
|
|
/***************************************************************************/
|
|
|
|
void lock_region(void *address, unsigned length)
|
|
{
|
|
union REGS regs;
|
|
unsigned linear;
|
|
|
|
linear=(unsigned) address;
|
|
regs.w.ax=0x600; /* DPMI Lock Linear Region */
|
|
regs.w.bx=(linear >> 16); /* Linear address in BX:CX */
|
|
regs.w.cx=(linear & 0xFFFF);
|
|
regs.w.si=(length >> 16); /* Length in SI:DI */
|
|
regs.w.di=(length & 0xFFFF);
|
|
int386(0x31,®s,®s);
|
|
}
|
|
|
|
|
|
void unlock_region(void *address, unsigned length)
|
|
{
|
|
union REGS regs;
|
|
unsigned linear;
|
|
|
|
linear=(unsigned) address;
|
|
regs.w.ax=0x601; /* DPMI UnLock Linear Region */
|
|
regs.w.bx=(linear >> 16); /* Linear address in BX:CX */
|
|
regs.w.cx=(linear & 0xFFFF);
|
|
regs.w.si=(length >> 16); /* Length in SI:DI */
|
|
regs.w.di=(length & 0xFFFF);
|
|
int386(0x31,®s,®s);
|
|
}
|
|
|
|
|
|
void timerstub1(void);
|
|
void timerstub2(void);
|
|
|
|
void INT_Setup(void)
|
|
{
|
|
oldkeyboardisr = _dos_getvect(KEYBOARDINT);
|
|
lock_region(keyboard,sizeof(keyboard));
|
|
lock_region(in_button,sizeof(in_button));
|
|
lock_region(scanbuttons,sizeof(scanbuttons));
|
|
lock_region(&j1,512); // check greed.map (should be first var)
|
|
lock_region(ASCIINames,sizeof(ASCIINames));
|
|
lock_region(ShiftNames,sizeof(ShiftNames));
|
|
lock_region(SpecialNames,sizeof(SpecialNames));
|
|
lock_region((void near *)INT_KeyboardISR,(char *)KBstub - (char near *)INT_KeyboardISR);
|
|
lock_region((void near *)timerstub1,(char *)timerstub2 - (char near *)timerstub1);
|
|
_dos_setvect(KEYBOARDINT,INT_KeyboardISR);
|
|
memset(keyboard,0,sizeof(keyboard));
|
|
M_Init();
|
|
dInitTimer();
|
|
dStartTimer(INT_TimerISR,TICKS(70));
|
|
timeractive=true;
|
|
J_Init();
|
|
}
|
|
|
|
|
|
void INT_ShutdownKeyboard(void)
|
|
{
|
|
if (oldkeyboardisr) _dos_setvect(KEYBOARDINT,oldkeyboardisr);
|
|
INT_TimerHook(NULL);
|
|
}
|
|
|
|
|
|
void INT_Shutdown(void)
|
|
{
|
|
if (oldkeyboardisr) _dos_setvect(KEYBOARDINT,oldkeyboardisr);
|
|
if (timeractive) dDoneTimer();
|
|
if (mouseinstalled) M_Shutdown();
|
|
}
|