/
PCRLIB_C.C
1625 lines (1315 loc) · 30 KB
/
PCRLIB_C.C
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/* The Catacomb Source Code
* Copyright (C) 1993-2014 Flat Rock Software
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define CATALOG
#include "pcrlib.h"
#include <conio.h>
char ch,str[80]; // scratch space
/*========================================================================*/
inputtype playermode[3] = {0,keyboard,joystick1};
boolean keydown[128];
int JoyXlow [3], JoyXhigh [3], JoyYlow [3], JoyYhigh [3];
int MouseSensitivity;
char key[8],keyB1,keyB2;
void interrupt (*oldint9) ()=NULL;
char demobuffer[5000];
char *demoptr;
int democount;
int lastdemoval; // so demo can be RLE compressed
enum demoenum indemo;
/*=======================================================================*/
/*
=======================
=
= SetupKBD
= Clears the keydown array and installs the INT 9 ISR if it isn't allready
= hooked up.
=
=======================
*/
void SetupKBD ()
{
void far *vect = getvect (9);
int i;
for (i=0;i<128;i++) /* clear our key down table */
keydown[i]= false;
poke (0x40,0x1c,peek(0x40,0x1a)); /* clear the bios key buffer */
if ( &Int9ISR != vect ) /* is our handler allready set up? */
{
oldint9 = vect;
setvect (9,Int9ISR);
}
}
/*
=========================
=
= Int9ISR
= Called for every keypress. Keeps track of which keys are down, and passes
= the key on to DOS after clearing the dos buffer (max 1 char in buffer).
=
=========================
*/
void interrupt Int9ISR ()
{
int key = inportb (0x60); /* get the key pressed */
if (key>127)
keydown [key-128] = false; /* break scan code */
else
{
keydown [key] = true; /* make scan code */
poke (0x40,0x1c,peek(0x40,0x1a)); /* clear the bios key buffer */
}
asm {
push ax
push bx
push cx
push dx
push si
push di
push bp
}
oldint9 (); /* give it to DOS */
asm {
pop bp
pop di
pop si
pop dx
pop cx
pop bx
pop ax
}
outport (0x20,0x20); /* tell the int manager we got it */
}
/*
===========================
=
= ShutdownKBD
= Sets the int 9 vector back to oldint 9
=
===========================
*/
void ShutdownKBD ()
{
if (oldint9 != NULL)
setvect (9,oldint9);
}
/*
===========================
=
= ControlKBD
=
===========================
*/
ControlStruct ControlKBD ()
{
int xmove=0,
ymove=0;
ControlStruct action;
if (keydown [key[north]])
ymove=-1;
if (keydown [key[east]])
xmove=1;
if (keydown [key[south]])
ymove=1;
if (keydown [key[west]])
xmove=-1;
if (keydown [key[northeast]])
{
ymove=-1;
xmove=1;
}
if (keydown [key[northwest]])
{
ymove=-1;
xmove=-1;
}
if (keydown [key[southeast]])
{
ymove=1;
xmove=1;
}
if (keydown [key[southwest]])
{
ymove=1;
xmove=-1;
}
switch (ymove*3+xmove)
{
case -4: action.dir = northwest; break;
case -3: action.dir = north; break;
case -2: action.dir = northeast; break;
case -1: action.dir = west; break;
case 0: action.dir = nodir; break;
case 1: action.dir = east; break;
case 2: action.dir = southwest; break;
case 3: action.dir = south; break;
case 4: action.dir = southeast; break;
}
action.button1 = keydown [keyB1];
action.button2 = keydown [keyB2];
return (action);
}
/*
============================
=
= ControlMouse
=
============================
*/
ControlStruct ControlMouse ()
{
int newx,newy, /* mickeys the mouse has moved */
xmove = 0,
ymove = 0;
ControlStruct action;
_AX = 3;
geninterrupt (0x33); /* mouse status */
newx = _CX;
newy = _DX;
action.button1 = _BX & 1;
action.button2 = (_BX & 2) >> 1;
if ((newx-320)/2>MouseSensitivity)
{
xmove = 1;
newx = newx - MouseSensitivity*2;
}
else if ((newx-320)/2<-MouseSensitivity)
{
xmove = -1;
newx = newx + MouseSensitivity*2;
}
if ((newy-100)>MouseSensitivity)
{
ymove = 1;
newy = newy - MouseSensitivity;
}
else if ((newy-100)<-MouseSensitivity)
{
ymove = -1;
newy = newy + MouseSensitivity;
}
_AX = 4;
_CX=newx;
_DX=newy;
geninterrupt (0x33); /* set mouse status */
switch (ymove*3+xmove)
{
case -4: action.dir = northwest; break;
case -3: action.dir = north; break;
case -2: action.dir = northeast; break;
case -1: action.dir = west; break;
case 0: action.dir = nodir; break;
case 1: action.dir = east; break;
case 2: action.dir = southwest; break;
case 3: action.dir = south; break;
case 4: action.dir = southeast; break;
}
return (action);
}
/*
===============================
=
= ReadJoystick
= Just return the resistance count of the joystick
=
===============================
*/
void ReadJoystick (int joynum,int *xcount,int *ycount)
{
int portval,a1,a2,xbit,ybit;
if (joynum==1)
{
xbit=1;
ybit=2;
}
else
{
xbit=4;
ybit=8;
}
*xcount = 0;
*ycount = 0;
outportb (0x201,inportb (0x201)); /* start the signal pulse */
asm cli;
do
{
portval = inportb (0x201);
a1 = (portval & xbit) != 0;
a2 = (portval & ybit) != 0;
*xcount+=a1;
*ycount+=a2;
} while ((a1+a2!=0) && (*xcount<500) && (*ycount<500));
asm sti;
}
/*
=============================
=
= ControlJoystick (joy# = 1 / 2)
=
=============================
*/
ControlStruct ControlJoystick (int joynum)
{
int joyx = 0,joyy = 0, /* resistance in joystick */
xmove = 0,
ymove = 0,
buttons;
ControlStruct action;
ReadJoystick (joynum,&joyx,&joyy);
if ( (joyx>500) | (joyy>500) )
{
joyx=JoyXlow [joynum] + 1; /* no joystick connected, do nothing */
joyy=JoyYlow [joynum] + 1;
}
if (joyx > JoyXhigh [joynum])
xmove = 1;
else if (joyx < JoyXlow [joynum])
xmove = -1;
if (joyy > JoyYhigh [joynum])
ymove = 1;
else if (joyy < JoyYlow [joynum])
ymove = -1;
switch (ymove*3+xmove)
{
case -4: action.dir = northwest; break;
case -3: action.dir = north; break;
case -2: action.dir = northeast; break;
case -1: action.dir = west; break;
case 0: action.dir = nodir; break;
case 1: action.dir = east; break;
case 2: action.dir = southwest; break;
case 3: action.dir = south; break;
case 4: action.dir = southeast; break;
}
buttons = inportb (0x201); /* get all four button status */
if (joynum == 1)
{
action.button1 = ((buttons & 0x10) == 0);
action.button2 = ((buttons & 0x20) == 0);
}
else
{
action.button1 = ((buttons & 0x40) == 0);
action.button2 = ((buttons & 0x80) == 0);
}
return (action);
}
/*
=============================
=
= ControlPlayer
=
= Expects a 1 or a 2
=
=============================
*/
ControlStruct ControlPlayer (int player)
{
ControlStruct ret;
int val;
if (indemo == notdemo || indemo == recording)
{
switch (playermode[player])
{
case keyboard : ret = ControlKBD (); break;
case mouse : ret = ControlMouse (); break;
case joystick1: ret = ControlJoystick(1); break;
case joystick2: ret = ControlJoystick(2); break;
}
//
// recording a demo?
//
if (indemo == recording)
{
val = (ret.dir << 2) | (ret.button2 << 1) | ret.button1;
*demoptr++=val;
}
}
else
//
// get the command from the demo buffer
//
{
val = *demoptr++;
ret.button1 = val & 1;
ret.button2 = (val & 2) >> 1;
ret.dir = (dirtype) ( (val & (4+8+16+32) ) >> 2);
}
return (ret);
}
////////////////////////
//
// RecordDemo
// Clears the demo buffer and starts capturing events
//
////////////////////////
void RecordDemo (void)
{
demobuffer[0]=level;
demoptr = &demobuffer[1];
indemo = recording;
}
////////////////////////
//
// LoadDemo / SaveDemo
// Loads a demo from disk or
// saves the accumulated demo command string to disk
//
////////////////////////
void LoadDemo (int demonum)
{
char st2[5];
strcpy (str,"DEMO");
itoa (demonum,st2,10);
strcat (str,st2);
strcat (str,".");
strcat (str,_extension);
LoadFile (str,MK_FP(_DS,&demobuffer));
level=demobuffer[0];
demoptr = &demobuffer[1];
indemo = demoplay;
}
void SaveDemo (int demonum)
{
char st2[5];
strcpy (str,"DEMO");
itoa (demonum,st2,10);
strcat (str,st2);
strcat (str,".");
strcat (str,_extension);
SaveFile (str,MK_FP(_DS,&demobuffer),(demoptr-&demobuffer[0]));
indemo = notdemo;
}
////////////////////////
//
// StartDemo
//
////////////////////////
/*=========================================================================*/
/*
** Miscellanious library routines
*/
///////////////////////////////
//
// clearkeys
// Clears out the bios buffer and zeros out the keydown array
//
///////////////////////////////
void clearkeys (void)
{
int i;
while (bioskey (1))
bioskey(0);
for (i=0;i<128;i++)
keydown [i]=0;
}
/*
===========================================
=
= Allocate a block aligned on a paragraph
=
===========================================
*/
void far *lastparalloc; // global variable of the EXACT (not paralign)
// last block, so it can be freed right
void huge *paralloc (long size)
{
void huge *temp;
word seg,ofs;
/* allocate a block with extra space */
lastparalloc = (void far*)temp = farmalloc (size+15);
if (temp == NULL)
//
// not enough memory!
//
{
setscreenmode (text);
_quit ("Out of memory!");
}
ofs=FP_OFF(temp);
if (ofs!=0) /* set offset to 0 and bump segment */
{
seg=FP_SEG(temp);
seg++;
ofs=0;
temp=MK_FP (seg,ofs);
}
return (void huge *) temp;
}
//==========================================================================
/*
==============================================
=
= Load a *LARGE* file into a FAR buffer!
= by John Romero (C) 1990 PCRcade
=
==============================================
*/
unsigned long LoadFile(char *filename,char huge *buffer)
{
unsigned int handle,flength1=0,flength2=0,buf1,buf2,foff1,foff2;
buf1=FP_OFF(buffer);
buf2=FP_SEG(buffer);
asm mov WORD PTR foff1,0 // file offset = 0 (start)
asm mov WORD PTR foff2,0
asm mov dx,filename
asm mov ax,3d00h // OPEN w/handle (read only)
asm int 21h
asm jc out
asm mov handle,ax
asm mov bx,ax
asm xor cx,cx
asm xor dx,dx
asm mov ax,4202h
asm int 21h // SEEK (find file length)
asm jc out
asm mov flength1,ax
asm mov flength2,dx
asm mov cx,flength2
asm inc cx // <- at least once!
L_1:
asm push cx
asm mov cx,foff2
asm mov dx,foff1
asm mov ax,4200h
asm int 21h // SEEK from start
asm push ds
asm mov bx,handle
asm mov cx,-1
asm mov dx,buf1
asm mov ax,buf2
asm mov ds,ax
asm mov ah,3fh // READ w/handle
asm int 21h
asm pop ds
asm pop cx
asm jc out
asm cmp ax,-1
asm jne out
asm push cx // need to read the last byte
asm push ds // into the segment! IMPORTANT!
asm mov bx,handle
asm mov cx,1
asm mov dx,buf1
asm add dx,-1
asm mov ax,buf2
asm mov ds,ax
asm mov ah,3fh
asm int 21h
asm pop ds
asm pop cx
asm add buf2,1000h
asm inc WORD PTR foff2
asm loop L_1
out:
asm mov bx,handle // CLOSE w/handle
asm mov ah,3eh
asm int 21h
return (flength2*0x10000+flength1);
}
//===========================================================================
/*
==============================================
=
= Save a *LARGE* file far a FAR buffer!
= by John Romero (C) 1990 PCRcade
=
==============================================
*/
void SaveFile(char *filename,char huge *buffer, long size)
{
unsigned int handle,buf1,buf2,foff1,foff2;
buf1=FP_OFF(buffer);
buf2=FP_SEG(buffer);
asm mov WORD PTR foff1,0 // file offset = 0 (start)
asm mov WORD PTR foff2,0
asm mov dx,filename
asm mov ax,3c00h // CREATE w/handle (read only)
asm xor cx,cx
asm int 21h
asm jc out
asm mov handle,ax
asm cmp word ptr size+2,0 // larger than 1 segment?
asm je L2
L1:
asm push ds
asm mov bx,handle
asm mov cx,8000h
asm mov dx,buf1
asm mov ax,buf2
asm mov ds,ax
asm mov ah,40h // WRITE w/handle
asm int 21h
asm pop ds
asm add buf2,800h // bump ptr up 1/2 segment
asm sub WORD PTR size,8000h // done yet?
asm sbb WORD PTR size+2,0
asm cmp WORD PTR size+2,0
asm ja L1
asm cmp WORD PTR size,8000h
asm jae L1
L2:
asm push ds
asm mov bx,handle
asm mov cx,WORD PTR size
asm mov dx,buf1
asm mov ax,buf2
asm mov ds,ax
asm mov ah,40h // WRITE w/handle
asm int 21h
asm pop ds
asm jmp out
out:
asm mov bx,handle // CLOSE w/handle
asm mov ah,3eh
asm int 21h
}
//==========================================================================
/*
====================================
=
= bloadin
= Paraligns just enough space and bloads in the
= specified file, returning a pointer to the start
=
====================================
*/
void huge *bloadin (char *filename)
{
int handle;
long length;
char huge *location;
if ( (handle = open (filename,O_BINARY)) != -1 )
{
length = filelength (handle);
location = paralloc (length);
close (handle);
LoadFile (filename,location);
return location;
}
else
return NULL;
}
/*==================================================================================*/
/*
** Graphic routines
*/
grtype grmode;
cardtype _videocard;
void huge *charptr; // 8*8 tileset
void huge *tileptr; // 16*16 tileset
void huge *picptr; // any size picture set
void huge *spriteptr; // any size masked and hit rect sprites
void huge *egaspriteptr[4]; // spriteptr for each ega plane's data
unsigned crtcaddr;
int sx,sy,leftedge;
/*
========================
=
= setscreenmode
= Call BIOS to set TEXT / CGAgr / EGAgr / VGAgr
=
========================
*/
void setscreenmode (grtype mode)
{
char extern VGAPAL; // deluxepaint vga pallet .OBJ file
void far *vgapal = &VGAPAL;
switch (mode)
{
case text: _AX = 3;
geninterrupt (0x10);
screenseg=0xb800;
break;
case CGAgr: _AX = 4;
geninterrupt (0x10);
screenseg=0xb800;
break;
case EGAgr: _AX = 0xd;
geninterrupt (0x10);
screenseg=0xa000;
EGAmove ();
moveega ();
break;
case VGAgr: _AX = 0x13;
geninterrupt (0x10);
screenseg=0xa000;
_ES = FP_SEG(vgapal);
_DX = FP_OFF(vgapal);
_BX = 0;
_CX = 0x100;
_AX = 0x1012;
geninterrupt(0x10); // set the deluxepaint pallet
break;
}
crtcaddr = 0x3d4; //peek (0x40,0x63) if not for two monitors...
}
/*
========================
=
= egasplitscreen
=
========================
*/
void egasplitscreen (int linenum)
{
WaitVBL ();
if (_videocard==VGAcard)
linenum*=2;
outportb (crtcaddr,CRTCLINECOMPARE);
outportb (crtcaddr+1,linenum % 256);
outportb (crtcaddr,CRTCOVERFLOW);
outportb (crtcaddr+1, 1+16*(linenum/256));
if (_videocard==VGAcard)
{
outportb (crtcaddr,CRTCMAXSCANLINE);
outportb (crtcaddr+1,inportb(crtcaddr+1) & (255-64));
}
}
/*
========================
=
= crtcstart
=
========================
*/
void crtcstart (unsigned start)
{
WaitVBL ();
outportb (crtcaddr,CRTCSTARTL);
outportb (crtcaddr+1,start % 256);
outportb (crtcaddr,CRTCSTARTH);
outportb (crtcaddr+1,start / 256);
}
int win_xl,win_yl,win_xh,win_yh;
int screencenterx = 19,screencentery = 11;
//////////////////////////
//
// drawwindow
// draws a bordered window and homes the cursor
//
//////////////////////////
void drawwindow (int xl, int yl, int xh, int yh)
{
int x,y;
win_xl=xl;
win_yl=yl;
win_xh=xh;
win_yh=yh; // so the window can be erased
drawchar (xl,yl,1);
for (x=xl+1;x<xh;x++)
drawchar (x,yl,2);
drawchar (xh,yl,3);
for (y=yl+1;y<yh;y++)
{
drawchar (xl,y,4);
for (x=xl+1;x<xh;x++)
drawchar (x,y,' ');
drawchar (xh,y,5);
}
drawchar (xl,yh,6);
for (x=xl+1;x<xh;x++)
drawchar (x,yh,7);
drawchar (xh,yh,8);
sx = leftedge = xl+1;
sy = yl+1;
}
////////////////////////////
//
// erasewindow
// clears out the last window and it's border to spaces
//
///////////////////////////
void bar (int xl, int yl, int xh, int yh, int ch)
{
int x,y;
for (y=yl;y<=yh;y++)
for (x=xl;x<=xh;x++)
drawchar (x,y,ch);
}
void erasewindow (void)
{
bar (win_xl,win_yl,win_xh,win_yh,' ');
}
/////////////////////////////
//
// centerwindow
// Centers a drawwindow of the given size
//
/////////////////////////////
void centerwindow (int width, int height)
{
int xl = screencenterx-width/2;
int yl = screencentery-height/2;
drawwindow (xl,yl,xl+width+1,yl+height+1);
}
///////////////////////////////
//
// expwin {h / v}
// Grows the window outward
//
///////////////////////////////
void expwin (int width, int height)
{
if (width > 2)
{
if (height >2)
expwin (width-2,height-2);
else
expwinh (width-2,height);
}
else
if (height >2)
expwinv (width,height-2);
WaitVBL ();
centerwindow (width,height);
}
void expwinh (int width, int height)
{
if (width > 2)
expwinh (width-2,height);
WaitVBL ();
centerwindow (width,height);
}
void expwinv (int width, int height)
{
if (height >2)
expwinv (width,height-2);
WaitVBL ();
centerwindow (width,height);
}
/////////////////////////
//
// get
// Flash a cursor at sx,sy and waits for a user bioskey
//
/////////////////////////
int get (void)
{
int cycle,key;
do
{
cycle = 9;
while (!(key = bioskey(1)) && cycle<13)
{
drawchar (sx,sy,cycle++);
WaitVBL ();
WaitVBL ();
WaitVBL ();
WaitVBL ();
WaitVBL ();
}
} while (key == 0);
drawchar (sx,sy,' ');
return bioskey(0); // take it out of the buffer
}
/////////////////////////
//
// print
// Prints a string at sx,sy. No clipping!!!
//