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comparison src/video/ataricommon/SDL_xbiosevents.c @ 305:9c6613983e85

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Atari port cleanups from Patrice
author Sam Lantinga <slouken@libsdl.org>
date Sun, 10 Mar 2002 03:33:59 +0000
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children e9278438fb3b
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304:ec53caed9fb2 305:9c6613983e85
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /*
29 * XBIOS mouse & joystick vectors
30 *
31 * Patrice Mandin
32 */
33
34 #include <stdlib.h>
35 #include <string.h>
36 #include <mint/osbind.h>
37
38 #include "SDL_events_c.h"
39 #include "SDL_xbiosevents_c.h"
40 #include "SDL_xbiosinterrupt_s.h"
41
42 /* Variables */
43
44 int SDL_AtariXbios_enabled=0;
45
46 static _KBDVECS *kbdvecs; /* Pointer to access vectors */
47 static _KBDVECS sys_kbdvecs; /* Backup of system vectors */
48 static Uint16 atari_prevmouseb; /* buttons */
49
50 void SDL_AtariXbios_InstallVectors(int vectors_mask)
51 {
52 void *oldpile;
53
54 /* Clear variables */
55 SDL_AtariXbios_mouseb =
56 SDL_AtariXbios_mousex =
57 SDL_AtariXbios_mousey =
58 SDL_AtariXbios_joystick =
59 atari_prevmouseb = 0;
60
61 /* Read IKBD vectors base */
62 kbdvecs=Kbdvbase();
63
64 /* Go to supervisor mode */
65 oldpile=(void *)Super(0);
66
67 /* Backup system vectors */
68 memcpy(&sys_kbdvecs, kbdvecs, sizeof(_KBDVECS));
69
70 /* Install our vector */
71 SDL_AtariXbios_Install(
72 kbdvecs,
73 (vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
74 (vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
75 );
76
77 /* Back to user mode */
78 Super(oldpile);
79
80 SDL_AtariXbios_enabled=1;
81 }
82
83 void SDL_AtariXbios_RestoreVectors(void)
84 {
85 void *oldpile;
86
87 /* Go to supervisor mode */
88 oldpile=(void *)Super(NULL);
89
90 /* Reinstall system vector */
91 SDL_AtariXbios_Install(kbdvecs,sys_kbdvecs.mousevec,sys_kbdvecs.joyvec);
92
93 /* Back to user mode */
94 Super(oldpile);
95 }
96
97 static int atari_GetButton(int button)
98 {
99 switch(button)
100 {
101 case 0:
102 return SDL_BUTTON_RIGHT;
103 break;
104 case 1:
105 default:
106 return SDL_BUTTON_LEFT;
107 break;
108 }
109 }
110
111 void SDL_AtariXbios_PostMouseEvents(_THIS)
112 {
113 /* Mouse motion ? */
114 if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
115 SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
116 SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
117 }
118
119 /* Mouse button ? */
120 if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
121 int i;
122
123 for (i=0;i<2;i++) {
124 int curbutton, prevbutton;
125
126 curbutton = SDL_AtariXbios_mouseb & (1<<i);
127 prevbutton = atari_prevmouseb & (1<<i);
128
129 if (curbutton & !prevbutton) {
130 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
131 }
132 if (!curbutton & prevbutton) {
133 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
134 }
135 }
136 atari_prevmouseb = SDL_AtariXbios_mouseb;
137 }
138 }