annotate src/video/ataricommon/SDL_xbiosevents.c @ 769:b8d311d90021

Updated copyright information for 2004 (Happy New Year!)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Jan 2004 16:49:27 +0000
parents e9278438fb3b
children 0b9b4bf3c1e7
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /*
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29 * XBIOS mouse & joystick vectors
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30 *
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31 * Patrice Mandin
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32 */
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33
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34 #include <stdlib.h>
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35 #include <string.h>
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36 #include <mint/osbind.h>
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37
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38 #include "SDL_events_c.h"
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39 #include "SDL_xbiosevents_c.h"
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40 #include "SDL_xbiosinterrupt_s.h"
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41
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42 /* Variables */
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43
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44 int SDL_AtariXbios_enabled=0;
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45
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46 static _KBDVECS *kbdvecs; /* Pointer to access vectors */
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47 static _KBDVECS sys_kbdvecs; /* Backup of system vectors */
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48 static Uint16 atari_prevmouseb; /* buttons */
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49
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50 void SDL_AtariXbios_InstallVectors(int vectors_mask)
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51 {
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52 void *oldpile;
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53
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54 /* Clear variables */
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55 SDL_AtariXbios_mouseb =
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56 SDL_AtariXbios_mousex =
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57 SDL_AtariXbios_mousey =
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58 SDL_AtariXbios_joystick =
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59 atari_prevmouseb = 0;
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60
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61 /* Read IKBD vectors base */
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62 kbdvecs=Kbdvbase();
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63
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64 /* Go to supervisor mode */
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65 oldpile=(void *)Super(0);
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66
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67 /* Backup system vectors */
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68 memcpy(&sys_kbdvecs, kbdvecs, sizeof(_KBDVECS));
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69
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70 /* Install our vector */
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71 SDL_AtariXbios_Install(
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72 kbdvecs,
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73 (vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
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74 (vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
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75 );
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76
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77 /* Back to user mode */
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78 Super(oldpile);
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79
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80 SDL_AtariXbios_enabled=1;
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81 }
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82
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83 void SDL_AtariXbios_RestoreVectors(void)
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84 {
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85 void *oldpile;
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86
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87 /* Go to supervisor mode */
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88 oldpile=(void *)Super(NULL);
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89
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90 /* Reinstall system vector */
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91 SDL_AtariXbios_Install(kbdvecs,sys_kbdvecs.mousevec,sys_kbdvecs.joyvec);
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92
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93 /* Back to user mode */
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94 Super(oldpile);
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95 }
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96
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97 static int atari_GetButton(int button)
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98 {
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99 switch(button)
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100 {
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101 case 0:
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102 return SDL_BUTTON_RIGHT;
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103 break;
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104 case 1:
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105 default:
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106 return SDL_BUTTON_LEFT;
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107 break;
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108 }
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109 }
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110
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111 void SDL_AtariXbios_PostMouseEvents(_THIS)
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112 {
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113 /* Mouse motion ? */
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114 if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
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115 SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
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116 SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
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117 }
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118
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119 /* Mouse button ? */
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120 if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
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121 int i;
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122
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123 for (i=0;i<2;i++) {
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124 int curbutton, prevbutton;
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125
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126 curbutton = SDL_AtariXbios_mouseb & (1<<i);
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127 prevbutton = atari_prevmouseb & (1<<i);
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128
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129 if (curbutton && !prevbutton) {
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130 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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131 }
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132 if (!curbutton && prevbutton) {
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133 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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134 }
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135 }
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136 atari_prevmouseb = SDL_AtariXbios_mouseb;
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137 }
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138 }