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annotate src/video/ataricommon/SDL_xbiosevents.c @ 3897:37dab4a917c4 SDL-1.2

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Check video driver mouse cursor pointers before using them
author Patrice Mandin <patmandin@gmail.com>
date Sun, 19 Nov 2006 14:07:32 +0000
parents be01e0b82dca
children a1b03ba2fcd0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 #include "SDL_config.h"
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23
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24 /*
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25 * XBIOS mouse & joystick vectors
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26 *
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27 * Patrice Mandin
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28 */
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29
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30 #include <mint/osbind.h>
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31
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32 #include "../../events/SDL_events_c.h"
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33 #include "SDL_xbiosevents_c.h"
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34 #include "SDL_xbiosinterrupt_s.h"
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35
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36 /* Variables */
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37
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38 int SDL_AtariXbios_enabled=0;
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39
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40 /* Local variables */
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41
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42 static _KBDVECS *kbdvecs; /* Pointer to access system vectors */
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43 static Uint16 atari_prevmouseb; /* buttons */
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44
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45 /* Functions */
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46
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47 void SDL_AtariXbios_InstallVectors(int vectors_mask)
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48 {
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49 void *oldpile;
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50
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51 /* Clear variables */
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52 SDL_AtariXbios_mouselock =
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53 SDL_AtariXbios_mouseb =
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54 SDL_AtariXbios_mousex =
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55 SDL_AtariXbios_mousey =
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56 SDL_AtariXbios_joystick =
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57 atari_prevmouseb = 0;
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58
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59 if (vectors_mask==0) {
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60 SDL_AtariXbios_enabled=0;
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61 return;
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62 }
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63
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64 /* Read IKBD vectors base */
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65 kbdvecs=Kbdvbase();
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66
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67 /* Go to supervisor mode */
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68 oldpile=(void *)Super(0);
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69
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70 /* Install our vectors */
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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 if (SDL_AtariXbios_enabled==0) {
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88 return;
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89 }
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90
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91 /* Read IKBD vectors base */
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92 kbdvecs=Kbdvbase();
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93
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94 /* Go to supervisor mode */
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95 oldpile=(void *)Super(NULL);
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96
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97 /* Reinstall system vector */
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98 SDL_AtariXbios_Restore(kbdvecs);
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99
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100 /* Back to user mode */
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101 Super(oldpile);
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102 }
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103
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104 static int atari_GetButton(int button)
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105 {
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106 switch(button)
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107 {
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108 case 0:
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109 return SDL_BUTTON_RIGHT;
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110 break;
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111 case 1:
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112 default:
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113 return SDL_BUTTON_LEFT;
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114 break;
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115 }
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116 }
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117
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118 void SDL_AtariXbios_PostMouseEvents(_THIS, SDL_bool buttonEvents)
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119 {
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120 if (SDL_AtariXbios_enabled==0) {
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121 return;
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122 }
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123
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124 /* Mouse motion ? */
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125 if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
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126 SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
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127 SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
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128 }
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129
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130 /* Mouse button ? */
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131 if (buttonEvents && (SDL_AtariXbios_mouseb != atari_prevmouseb)) {
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132 int i;
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133
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134 for (i=0;i<2;i++) {
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135 int curbutton, prevbutton;
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136
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137 curbutton = SDL_AtariXbios_mouseb & (1<<i);
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138 prevbutton = atari_prevmouseb & (1<<i);
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139
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140 if (curbutton && !prevbutton) {
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141 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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142 }
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143 if (!curbutton && prevbutton) {
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144 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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145 }
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146 }
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147 atari_prevmouseb = SDL_AtariXbios_mouseb;
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148 }
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149 }
3857
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150
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151 void SDL_AtariXbios_LockMousePosition(SDL_bool lockPosition)
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152 {
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153 SDL_AtariXbios_mouselock = lockPosition;
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154 }