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annotate src/video/ataricommon/SDL_xbiosevents.c @ 1230:88c2d6aed428

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From Mike Frysinger and/or Gentoo: - libsdl-PIC-load-mmx-masks-from-stack.patch this one may be a little controversial ... the fix here is again that you cant reference the memory addresses like this to load into a mmx register, so the way to do it is to push two 32bit words onto the stack, load the 64bit value off of the stack into the mmx register, and then adjust the stack so that it's back to normal.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 05 Jan 2006 15:25:19 +0000
parents 0b9b4bf3c1e7
children a8068adf156b
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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 <stdio.h>
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35 #include <stdlib.h>
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36 #include <string.h>
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37
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38 #include <mint/osbind.h>
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39
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40 #include "SDL_events_c.h"
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41 #include "SDL_xbiosevents_c.h"
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42 #include "SDL_xbiosinterrupt_s.h"
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43
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44 /* Variables */
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45
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46 int SDL_AtariXbios_enabled=0;
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47
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48 /* Local variables */
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49
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50 static _KBDVECS *kbdvecs; /* Pointer to access system vectors */
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51 static Uint16 atari_prevmouseb; /* buttons */
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52
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53 /* Functions */
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54
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55 void SDL_AtariXbios_InstallVectors(int vectors_mask)
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56 {
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57 void *oldpile;
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58
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59 /* Clear variables */
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60 SDL_AtariXbios_mouseb =
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61 SDL_AtariXbios_mousex =
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62 SDL_AtariXbios_mousey =
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63 SDL_AtariXbios_joystick =
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64 atari_prevmouseb = 0;
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65
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66 /* Read IKBD vectors base */
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67 kbdvecs=Kbdvbase();
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68
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69 /* Go to supervisor mode */
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70 oldpile=(void *)Super(0);
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71
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72 /* Install our vectors */
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73 SDL_AtariXbios_Install(
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74 kbdvecs,
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75 (vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
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76 (vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
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77 );
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78
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79 /* Back to user mode */
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80 Super(oldpile);
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81
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82 SDL_AtariXbios_enabled=1;
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83 }
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84
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85 void SDL_AtariXbios_RestoreVectors(void)
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86 {
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87 void *oldpile;
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88
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89 /* Read IKBD vectors base */
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90 kbdvecs=Kbdvbase();
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91
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92 /* Go to supervisor mode */
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93 oldpile=(void *)Super(NULL);
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94
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95 /* Reinstall system vector */
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96 SDL_AtariXbios_Restore(kbdvecs);
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97
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98 /* Back to user mode */
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99 Super(oldpile);
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100 }
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101
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102 static int atari_GetButton(int button)
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103 {
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104 switch(button)
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105 {
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106 case 0:
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107 return SDL_BUTTON_RIGHT;
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108 break;
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109 case 1:
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110 default:
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111 return SDL_BUTTON_LEFT;
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112 break;
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113 }
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114 }
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115
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116 void SDL_AtariXbios_PostMouseEvents(_THIS)
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117 {
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118 /* Mouse motion ? */
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119 if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
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120 SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
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121 SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
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122 }
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123
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124 /* Mouse button ? */
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125 if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
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126 int i;
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127
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128 for (i=0;i<2;i++) {
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129 int curbutton, prevbutton;
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130
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131 curbutton = SDL_AtariXbios_mouseb & (1<<i);
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132 prevbutton = atari_prevmouseb & (1<<i);
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133
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134 if (curbutton && !prevbutton) {
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135 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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136 }
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137 if (!curbutton && prevbutton) {
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138 SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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139 }
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140 }
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141 atari_prevmouseb = SDL_AtariXbios_mouseb;
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142 }
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143 }