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bmouse.cpp
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bmouse.cpp
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/* Copyright (C) 2018, Project Pluto
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. */
#include <stdio.h>
#include <stdlib.h>
#include <dos.h>
#include "bmouse.h"
#define MOUSEPORT 51
#define leftshift 0
static int mouse_call( int command, int ms2, int ms3)
{
union REGS in,out;
#ifdef __WATCOMC__
in.w.ax = (unsigned short)command;
in.w.bx = (unsigned)0;
in.w.cx = (unsigned short)ms2;
in.w.dx = (unsigned short)ms3;
in.w.cflag = 0;
#ifdef __386__
int386( MOUSEPORT, &in, &out);
#else
int86( MOUSEPORT, &in, &out);
#endif
return( out.w.ax);
#else
/* non-Watcom */
in.x.ax = (unsigned)command;
in.x.bx = (unsigned)0;
in.x.cx = (unsigned)ms2;
in.x.dx = (unsigned)ms3;
in.x.cflag = 0;
int86( MOUSEPORT, &in, &out);
return( out.x.ax);
#endif
}
int init_mouse( BMOUSE *b)
{
if( b->sensitivity == 0)
b->sensitivity = 3;
b->pressed = b->released = b->button = b->accum_released = 0;
b->dx = b->dy = b->private_unsigned[0] = b->private_unsigned[1] = 0;
b->pressed_x = b->pressed_y = 0;
b->prev_x = b->x;
b->prev_y = b->y;
if( b->diff_mode)
{
b->xmin = b->ymin = 0;
b->xmax = b->ymax = 1000;
b->x = b->y = 500;
}
if( b->mouse_installed == 2)
return( 0);
if( !mouse_call( 0, 0, 0)) /* install & reset the mouse */
return( NO_MOUSE_FOUND);
b->mouse_installed = 1;
mouse_call( 2, 0, 0); /* get rid of the cursor */
// mouse_call( 1, 0, 0); /* show mouse cursor */
mouse_call( 7, b->xmin << leftshift, b->xmax << leftshift); /* set the x-range */
mouse_call( 8, b->ymin << leftshift, b->ymax << leftshift); /* set the y-range */
mouse_call( 15, b->sensitivity, b->sensitivity);
mouse_call( 4, b->x << leftshift, b->y << leftshift); /* set starting loc */
return( 0);
}
void mouse_update_buttons( BMOUSE *b, int button)
{
b->pressed = button & (~b->button);
b->released = (~button) & b->button;
if( b->button && !button) /* all buttons have been released */
{
b->accum_released = b->private_unsigned[0];
b->private_unsigned[0] = 0;
}
else
{
b->accum_released = 0;
if( button && !b->private_unsigned[0])
{
b->pressed_x = b->x;
b->pressed_y = b->y;
}
b->private_unsigned[0] |= button;
}
b->button = button;
}
int mouse_read( BMOUSE *b)
{
int button;
unsigned x, y;
union REGS in,out;
if( !b->mouse_installed)
return( -1);
#ifdef __WATCOMC__
in.w.ax = 3; /* get mouse location */
in.w.cflag=0;
#ifdef __386__
int386( MOUSEPORT, &in, &out);
#else
int86( MOUSEPORT, &in, &out);
#endif
button = (int)out.w.bx;
x = out.w.cx >> leftshift;
y = out.w.dx >> leftshift;
#else
/* non-Watcom */
in.x.ax = 3; /* get mouse location */
in.x.cflag=0;
int86( MOUSEPORT, &in, &out);
button = (int)out.x.bx;
x = out.x.cx >> leftshift;
y = out.x.dx >> leftshift;
#endif
b->dx = (int)( x - b->x);
b->dy = (int)( y - b->y);
b->prev_x = b->x;
b->prev_y = b->y;
if( b->diff_mode && (b->dx || b->dy))
mouse_set_position( b, 500, 500);
else
{
b->x = x;
b->y = y;
}
mouse_update_buttons( b, button);
return( 0);
}
int mouse_set_position( BMOUSE *b, unsigned x, unsigned y)
{
if( x > b->xmax) x = b->xmax;
if( y > b->ymax) y = b->ymax;
if( x < b->xmin) x = b->xmin;
if( y < b->ymin) y = b->ymin;
b->prev_x = b->x;
b->prev_y = b->y;
b->x = x;
b->y = y;
if( !b->mouse_installed)
return( -1);
if( b->mouse_installed == 1)
mouse_call( 4, x << leftshift, y << leftshift);
return( 0);
}