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pcrlib_c.c
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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
#ifdef _MSC_VER
#include <io.h>
#include <BaseTsd.h>
typedef SSIZE_T ssize_t;
#else
#include <unistd.h>
#endif
#include <sys/stat.h>
#include <stdlib.h>
#include <limits.h>
#include <ctype.h>
#include "catdefs.h"
#include "catacomb.h"
#include "pcrlib.h"
char ch,str[80]; // scratch space
/*========================================================================*/
inputtype playermode[3] = {0,keyboard,joystick1};
boolean keydown[SDL_NUM_SCANCODES];
int JoyXlow [3], JoyXhigh [3], JoyYlow [3], JoyYhigh [3];
int MouseSensitivity;
boolean mouseEvent;
int key[8],keyB1,keyB2;
char demobuffer[5000];
char *demoptr;
int democount;
int lastdemoval; // so demo can be RLE compressed
enum demoenum indemo;
static SDL_Scancode lastkey = 0;
SDL_Window *window;
SDL_Renderer *renderer;
SDL_Texture *sdltexture;
SDL_Rect updateRect;
SDL_DisplayMode mode;
joyinfo_t joystick[3];
/*=======================================================================*/
/*
=======================
=
= SetupKBD
= Clears the keydown array and installs the INT 9 ISR if it isn't allready
= hooked up.
=
=======================
*/
void SetupKBD ()
{
unsigned i;
for (i=0;i<128;i++) /* clear our key down table */
keydown[i]= false;
}
void ProcessEvents ()
{
mouseEvent = false;
SDL_Event event;
while(SDL_PollEvent(&event))
{
if(event.type == SDL_KEYDOWN)
{
keydown[event.key.keysym.scancode] = true;
lastkey = event.key.keysym.scancode;
}
else if(event.type == SDL_KEYUP)
{
keydown[event.key.keysym.scancode] = false;
}
else if(event.type == SDL_MOUSEMOTION)
{
mouseEvent = true;
}
}
}
/*
=======================
=
= WatchUIEvents
= Event filter which hooks into the user interface (trying to close the window
= or other windowing events).
=
=======================
*/
static boolean hasFocus = true;
static int WatchUIEvents (void *udata, SDL_Event *event)
{
if (event->type == SDL_QUIT)
_quit("");
else if (event->type == SDL_WINDOWEVENT)
{
switch(event->window.event)
{
case SDL_WINDOWEVENT_FOCUS_LOST:
hasFocus = false;
CheckMouseMode ();
break;
case SDL_WINDOWEVENT_FOCUS_GAINED:
// Try to wait until the window obtains mouse focus before
// regrabbing input in order to try to prevent grabbing while
// the user is trying to move the window around.
while(SDL_GetMouseFocus () != window)
{
SDL_PumpEvents();
SDL_Delay(10);
}
hasFocus = true;
CheckMouseMode ();
break;
default:
break;
}
}
return 0;
}
/*
===========================
=
= 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;
int buttons = SDL_GetRelativeMouseState(&newx, &newy); /* mouse status */
action.button1 = buttons & SDL_BUTTON(SDL_BUTTON_LEFT);
action.button2 = buttons & SDL_BUTTON(SDL_BUTTON_RIGHT);
if (mouseEvent == false)
{
action.dir = nodir;
return (action);
}
if (newx>MouseSensitivity)
{
xmove = 1;
}
else if (newx<-MouseSensitivity)
{
xmove = -1;
}
if (newy>MouseSensitivity)
{
ymove = 1;
}
else if (newy<-MouseSensitivity)
{
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;
}
return (action);
}
/*
===============================
=
= ShutdownJoysticks
= Try to identify joysticks and open them.
=
===============================
*/
static void ShutdownJoysticks ()
{
unsigned j;
for (j = 1; j < 3; ++j)
{
if (joystick[j].device < 0)
continue;
if (joystick[j].isgamecontroller)
{
SDL_GameControllerClose (joystick[j].controller);
}
else
{
SDL_JoystickClose (joystick[j].joy);
}
joystick[j].device = -1;
}
}
/*
===============================
=
= ProbeJoysticks
= Try to identify joysticks and open them.
=
===============================
*/
void ProbeJoysticks ()
{
int j;
// See if we already probed before and reset if so.
if (joystick[1].device > 0 || joystick[2].device > 0)
ShutdownJoysticks();
for (j = 1; j < 3; ++j)
{
if (j-1 >= SDL_NumJoysticks())
{
joystick[j].device = -1;
continue;
}
joystick[j].device = j-1;
joystick[j].isgamecontroller = SDL_IsGameController(j-1);
if (SDL_IsGameController(j-1))
{
joystick[j].controller = SDL_GameControllerOpen(j-1);
}
else
{
joystick[j].joy = SDL_JoystickOpen(j-1);
}
}
}
/*
===============================
=
= ReadJoystick
= Just return the resistance count of the joystick
=
===============================
*/
void ReadJoystick (int joynum,int *xcount,int *ycount)
{
int a1,a2;
*xcount = 0;
*ycount = 0;
SDL_JoystickUpdate(); /* start the signal pulse */
if (joystick[joynum].isgamecontroller)
{
a1 = SDL_GameControllerGetAxis(joystick[joynum].controller, SDL_CONTROLLER_AXIS_LEFTX);
a2 = SDL_GameControllerGetAxis(joystick[joynum].controller, SDL_CONTROLLER_AXIS_LEFTY);
}
else
{
a1 = SDL_JoystickGetAxis(joystick[joynum].joy, 0);
a2 = SDL_JoystickGetAxis(joystick[joynum].joy, 1);
}
*xcount = a1;
*ycount = a2;
}
/*
=============================
=
= ControlJoystick (joy# = 1 / 2)
=
=============================
*/
ControlStruct ControlJoystick (int joynum)
{
int joyx = 0,joyy = 0, /* resistance in joystick */
xmove = 0,
ymove = 0;
ControlStruct action;
ReadJoystick (joynum,&joyx,&joyy);
/* get all four button status */
if (joystick[joynum].isgamecontroller)
{
action.button1 = (SDL_GameControllerGetButton(joystick[joynum].controller, SDL_CONTROLLER_BUTTON_A) != 0);
action.button2 = (SDL_GameControllerGetButton(joystick[joynum].controller, SDL_CONTROLLER_BUTTON_B) != 0);
}
else
{
action.button1 = (SDL_JoystickGetButton(joystick[joynum].joy, 0) != 0);
action.button2 = (SDL_JoystickGetButton(joystick[joynum].joy, 1) != 0);
}
if (joyx == 0 && joyy == 0)
{
action.dir = nodir;
return (action); /* no joystick movement, do nothing */
}
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;
}
return (action);
}
/*
=============================
=
= ControlPlayer
=
= Expects a 1 or a 2
=
=============================
*/
ControlStruct ControlPlayer (int player)
{
ControlStruct ret;
int val;
ProcessEvents();
if (indemo == notdemo || indemo == recording)
{
switch (playermode[player])
{
default:
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]=(char)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,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,demobuffer,(long)(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;
}
//==========================================================================
#ifndef _WIN32
static long filelength (int fd)
{
struct stat s;
if(fstat(fd, &s))
return -1;
return s.st_size;
}
#endif
/*
==============================================
=
= Load a *LARGE* file into a FAR buffer!
= by John Romero (C) 1990 PCRcade
=
==============================================
*/
unsigned long LoadFile(char *filename,char *buffer)
{
int fd;
if((fd = open(filename, S_IREAD)) < 0)
return 0;
long len = filelength(fd);
ssize_t bytesRead = read(fd, buffer, len);
close(fd);
return (long)bytesRead;
}
//===========================================================================
/*
==============================================
=
= Save a *LARGE* file far a FAR buffer!
= by John Romero (C) 1990 PCRcade
=
==============================================
*/
void SaveFile(char *filename,char *buffer, long size)
{
int fd;
if((fd = open(filename, O_WRONLY | O_BINARY | O_CREAT | O_TRUNC, S_IREAD | S_IWRITE)) < 0)
return;
write(fd, buffer, size);
close(fd);
}
//==========================================================================
/*
====================================
=
= bloadin
= Paraligns just enough space and bloads in the
= specified file, returning a pointer to the start
=
====================================
*/
void *bloadin (char *filename)
{
int handle;
long length;
char *location;
if ( (handle = open (filename,O_BINARY)) != -1 )
{
length = filelength (handle);
location = malloc (length);
close (handle);
LoadFile (filename,location);
return location;
}
else
return NULL;
}
/*==================================================================================*/
/*
** Graphic routines
*/
grtype grmode;
void *charptr; // 8*8 tileset
void *tileptr; // 16*16 tileset
void *picptr; // any size picture set
void *spriteptr; // any size masked and hit rect sprites
dword egaplaneofs[4];
int sx,sy,leftedge;
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);
UpdateScreen();
WaitVBL ();
centerwindow (width,height);
}
void expwinh (int width, int height)
{
if (width > 2)
expwinh (width-2,height);
UpdateScreen();
WaitVBL ();
centerwindow (width,height);
}
void expwinv (int width, int height)
{
if (height >2)
expwinv (width,height-2);
UpdateScreen();
WaitVBL ();
centerwindow (width,height);
}
/////////////////////////
//
// get
// Flash a cursor at sx,sy and waits for a user bioskey
//
/////////////////////////
int bioskey(int cmd)
{
if(lastkey)
{
int oldkey = lastkey;
if(cmd != 1)
lastkey = 0;
return oldkey;
}
SDL_Event event;
while (SDL_PollEvent (&event))
{
if(event.type == SDL_KEYDOWN)
{
if(cmd == 1)
return lastkey = event.key.keysym.scancode;
return event.key.keysym.scancode;
}
}
return lastkey;
}
void UpdateScreen()
{
static Uint32 EGAPalette[16] = {
0x000000, 0x0000AA, 0x00AA00, 0x00AAAA,
0xAA0000, 0xAA00AA, 0xAA5500, 0xAAAAAA,
0x555555, 0x5555FF, 0x55FF55, 0x55FFFF,
0xFF5555, 0xFF55FF, 0xFFFF55, 0xFFFFFF
};
static Uint32 CGAPalette[4] = {
0x000000, 0x55FFFF, 0xFF55FF, 0xFFFFFF
};
static Uint32 conv[sizeof(screenseg)];
size_t i = 0;
if(grmode == EGAgr)
{
while (i < sizeof(screenseg))
{
conv[i] = EGAPalette[screenseg[i]];
++i;
}
}
else if(grmode == CGAgr)
{
while (i < sizeof(screenseg))
{
conv[i] = CGAPalette[screenseg[i]];
++i;
}
}
else
assert(false && "VGA Palette conversion not implemented.");
SDL_UpdateTexture(sdltexture, NULL, conv, 320*sizeof(Uint32));
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, sdltexture, NULL, &updateRect);
SDL_RenderPresent(renderer);
}
int get (void)
{
int cycle,key;
do
{
cycle = 9;
while (!(key = bioskey(0)) && cycle<13)
{
drawchar (sx,sy,cycle++);
UpdateScreen();
WaitVBL ();
WaitVBL ();
WaitVBL ();
WaitVBL ();
WaitVBL ();
}
} while (key == 0);
drawchar (sx,sy,' ');
UpdateScreen();
return SDL_GetKeyFromScancode(key); // take it out of the buffer
}
/////////////////////////
//
// print
// Prints a string at sx,sy. No clipping!!!
//
/////////////////////////
void print (const char *str)
{
char ch;
while ((ch=*str++) != 0)
if (ch == '\n')
{
sy++;
sx=leftedge;
}
else if (ch == '\r')
sx=leftedge;
else
drawchar (sx++,sy,(byte)ch);
}
// For help screen
void printchartile (const char *str)
{
char ch;
while ((ch=*str++) != 0)
if (ch == '\n')
{
sy++;
sx=leftedge;
}
else if (ch == '\r')
sx=leftedge;
else
drawchartile (sx++,sy,(byte)ch);
}
///////////////////////////
//
// printint / printlong
// Converts the value to a string and prints it
//
///////////////////////////
void printint (int val)
{
itoa(val,str,10);
print (str);
}
void printlong (long val)
{
ltoa(val,str,10);
print (str);
}
/*========================================================================*/
////////////////////////////////////////////////////////////////////
//
// Verify a file's existence
//
////////////////////////////////////////////////////////////////////
long _Verify(char *filename)
{
int handle;
long size;
if ((handle=open(filename,O_BINARY))==-1) return 0;
size=filelength(handle);
close(handle);
return size;
}
////////////////////////////////////////////////////////////////////
//
// print hex byte
//
////////////////////////////////////////////////////////////////////
void _printhexb(unsigned char value)
{
int loop;
char hexstr[16]="0123456789ABCDEF",str[2]="";
for (loop=0;loop<2;loop++)
{
str[0]=hexstr[(value>>(1-loop)*4)&15];
print(str);
}
}
////////////////////////////////////////////////////////////////////
//