1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 /*
25 * XBIOS mouse & joystick vectors
26 *
27 * Patrice Mandin
28 */
29
30 #include <mint/osbind.h>
31
32 #include "../../events/SDL_events_c.h"
33 #include "SDL_atarisuper.h"
34 #include "SDL_xbiosevents_c.h"
35 #include "SDL_xbiosinterrupt_s.h"
36
37 /* Variables */
38
39 int SDL_AtariXbios_enabled=0;
40
41 /* Local variables */
42
43 static _KBDVECS *kbdvecs; /* Pointer to access system vectors */
44 static Uint16 atari_prevmouseb; /* buttons */
45
46 /* Functions */
47
SDL_AtariXbios_InstallVectors(int vectors_mask)48 void SDL_AtariXbios_InstallVectors(int vectors_mask)
49 {
50 void *oldpile;
51
52 /* Clear variables */
53 SDL_AtariXbios_mouselock =
54 SDL_AtariXbios_mouseb =
55 SDL_AtariXbios_mousex =
56 SDL_AtariXbios_mousey =
57 SDL_AtariXbios_joystick =
58 atari_prevmouseb = 0;
59
60 if (vectors_mask==0) {
61 SDL_AtariXbios_enabled=0;
62 return;
63 }
64
65 /* Read IKBD vectors base */
66 kbdvecs=Kbdvbase();
67
68 /* Go to supervisor mode */
69 oldpile=(void *)Super(0);
70
71 /* Install our vectors */
72 SDL_AtariXbios_Install(
73 kbdvecs,
74 (vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
75 (vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
76 );
77
78 /* Back to user mode */
79 SuperToUser(oldpile);
80
81 SDL_AtariXbios_enabled=1;
82 }
83
SDL_AtariXbios_RestoreVectors(void)84 void SDL_AtariXbios_RestoreVectors(void)
85 {
86 void *oldpile;
87
88 if (SDL_AtariXbios_enabled==0) {
89 return;
90 }
91
92 /* Read IKBD vectors base */
93 kbdvecs=Kbdvbase();
94
95 /* Go to supervisor mode */
96 oldpile=(void *)Super(NULL);
97
98 /* Reinstall system vector */
99 SDL_AtariXbios_Restore(kbdvecs);
100
101 /* Back to user mode */
102 SuperToUser(oldpile);
103 }
104
atari_GetButton(int button)105 static int atari_GetButton(int button)
106 {
107 switch(button)
108 {
109 case 0:
110 return SDL_BUTTON_RIGHT;
111 break;
112 case 1:
113 default:
114 return SDL_BUTTON_LEFT;
115 break;
116 }
117 }
118
SDL_AtariXbios_PostMouseEvents(_THIS,SDL_bool buttonEvents)119 void SDL_AtariXbios_PostMouseEvents(_THIS, SDL_bool buttonEvents)
120 {
121 if (SDL_AtariXbios_enabled==0) {
122 return;
123 }
124
125 /* Mouse motion ? */
126 if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
127 SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
128 SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
129 }
130
131 /* Mouse button ? */
132 if (buttonEvents && (SDL_AtariXbios_mouseb != atari_prevmouseb)) {
133 int i;
134
135 for (i=0;i<2;i++) {
136 int curbutton, prevbutton;
137
138 curbutton = SDL_AtariXbios_mouseb & (1<<i);
139 prevbutton = atari_prevmouseb & (1<<i);
140
141 if (curbutton && !prevbutton) {
142 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
143 }
144 if (!curbutton && prevbutton) {
145 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
146 }
147 }
148 atari_prevmouseb = SDL_AtariXbios_mouseb;
149 }
150 }
151
SDL_AtariXbios_LockMousePosition(SDL_bool lockPosition)152 void SDL_AtariXbios_LockMousePosition(SDL_bool lockPosition)
153 {
154 SDL_AtariXbios_mouselock = lockPosition;
155 }
156