1 /* kempmouse.c: Kempston mouse emulation
2 Copyright (c) 2004-2008 Darren Salt, Fredrick Meunier
3
4 $Id: kempmouse.c 4926 2013-05-05 07:58:18Z sbaldovi $
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License along
17 with this program; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19
20 Author contact information:
21
22 E-mail: linux@youmustbejoking.demon.co.uk
23
24 */
25
26 #include <config.h>
27
28 #include <libspectrum.h>
29
30 #include "kempmouse.h"
31 #include "module.h"
32 #include "periph.h"
33 #include "settings.h"
34 #include "ui/ui.h"
35
36 static void kempmouse_from_snapshot( libspectrum_snap *snap );
37 static void kempmouse_to_snapshot( libspectrum_snap *snap );
38
39 static module_info_t kempmouse_module_info = {
40
41 NULL,
42 NULL,
43 NULL,
44 kempmouse_from_snapshot,
45 kempmouse_to_snapshot,
46
47 };
48
49 static struct {
50 struct { libspectrum_byte x, y; } pos;
51 libspectrum_byte buttons;
52 } kempmouse = { {0, 0}, 255 };
53
54 #define READ(name,item) \
55 static libspectrum_byte \
56 read_##name( libspectrum_word port GCC_UNUSED, int *attached ) \
57 { \
58 *attached = 1; \
59 return kempmouse.item; \
60 }
61
62 READ( buttons, buttons );
63 READ( x_pos, pos.x );
64 READ( y_pos, pos.y );
65
66 static const periph_port_t kempmouse_ports[] = {
67 /* _we_ require b0 set */
68 { 0x0121, 0x0001, read_buttons, NULL },
69 { 0x0521, 0x0101, read_x_pos, NULL },
70 { 0x0521, 0x0501, read_y_pos, NULL },
71 };
72
73 static const periph_t kempmouse_periph = {
74 &settings_current.kempston_mouse,
75 kempmouse_ports,
76 1,
77 NULL
78 };
79
80 void
kempmouse_init(void)81 kempmouse_init( void )
82 {
83 module_register( &kempmouse_module_info );
84 periph_register( PERIPH_TYPE_KEMPSTON_MOUSE, &kempmouse_periph );
85 }
86
87 void
kempmouse_update(int dx,int dy,int btn,int down)88 kempmouse_update( int dx, int dy, int btn, int down )
89 {
90 kempmouse.pos.x += dx;
91 kempmouse.pos.y -= dy;
92 if( btn != -1 ) {
93 if( down )
94 kempmouse.buttons &= ~(1 << btn);
95 else
96 kempmouse.buttons |= 1 << btn;
97 }
98 }
99
100 static void
kempmouse_from_snapshot(libspectrum_snap * snap)101 kempmouse_from_snapshot( libspectrum_snap *snap )
102 {
103 settings_current.kempston_mouse =
104 libspectrum_snap_kempston_mouse_active( snap );
105 }
106
107 static void
kempmouse_to_snapshot(libspectrum_snap * snap)108 kempmouse_to_snapshot( libspectrum_snap *snap )
109 {
110 libspectrum_snap_set_kempston_mouse_active( snap,
111 settings_current.kempston_mouse );
112 }
113