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/* kempmouse.c: Kempston mouse emulation
Copyright (c) 2004-2008 Darren Salt, Fredrick Meunier
$Id: kempmouse.c 4030 2009-06-07 14:38:38Z fredm $
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.
Author contact information:
E-mail: linux@youmustbejoking.demon.co.uk
*/
#include <config.h>
#include <libspectrum.h>
#include "kempmouse.h"
#include "module.h"
#include "periph.h"
#include "settings.h"
#include "ui/ui.h"
static void kempmouse_from_snapshot( libspectrum_snap *snap );
static void kempmouse_to_snapshot( libspectrum_snap *snap );
static module_info_t kempmouse_module_info = {
NULL,
NULL,
NULL,
kempmouse_from_snapshot,
kempmouse_to_snapshot,
};
static struct {
struct { libspectrum_byte x, y; } pos;
libspectrum_byte buttons;
} kempmouse = { {0, 0}, 255 };
#define READ(name,item) \
static libspectrum_byte \
read_##name( libspectrum_word port GCC_UNUSED, int *attached ) \
{ \
if( !settings_current.kempston_mouse ) return 0xff; \
*attached = 1; \
return kempmouse.item; \
}
READ( buttons, buttons );
READ( x_pos, pos.x );
READ( y_pos, pos.y );
const periph_t kempmouse_peripherals[] = {
/* _we_ require b0 set */
{ 0x0121, 0x0001, read_buttons, NULL },
{ 0x0521, 0x0101, read_x_pos, NULL },
{ 0x0521, 0x0501, read_y_pos, NULL },
};
const size_t kempmouse_peripherals_count =
sizeof( kempmouse_peripherals ) / sizeof( periph_t );
int
kempmouse_init( void )
{
module_register( &kempmouse_module_info );
return 0;
}
void
kempmouse_update( int dx, int dy, int btn, int down )
{
kempmouse.pos.x += dx;
kempmouse.pos.y -= dy;
if( btn != -1 ) {
if( down )
kempmouse.buttons &= ~(1 << btn);
else
kempmouse.buttons |= 1 << btn;
}
}
static void
kempmouse_from_snapshot( libspectrum_snap *snap )
{
settings_current.kempston_mouse =
libspectrum_snap_kempston_mouse_active( snap );
}
static void
kempmouse_to_snapshot( libspectrum_snap *snap )
{
libspectrum_snap_set_kempston_mouse_active( snap,
settings_current.kempston_mouse );
}
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