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annotate src/video/ataricommon/SDL_ataridevmouse.c @ 2683:e858ac8868b6 gsoc2008_nds

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Ongoing video render work; initial work on NDS Timers.
author Darren Alton <dalton@stevens.edu>
date Fri, 08 Aug 2008 08:22:08 +0000
parents c121d94672cb
children 99210400e8b9
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 MiNT /dev/mouse driver
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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 <fcntl.h>
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31 #include <unistd.h>
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32
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33 #include "../../events/SDL_events_c.h"
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34 #include "SDL_ataridevmouse_c.h"
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35
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36 /* Defines */
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37
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38 #define DEVICE_NAME "/dev/mouse"
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39
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40 /* Local variables */
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41
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42 static int handle = -1;
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43 static int mouseb, prev_mouseb;
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44
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45 /* Functions */
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46
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47 int
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48 SDL_AtariDevMouse_Open(void)
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49 {
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50 int r;
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51 const char *mousedev;
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52
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53 /*
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54 TODO: Fix the MiNT device driver, that locks mouse for other
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55 applications, so this is disabled till fixed
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56 */
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57 return 0;
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58
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59 /* First, try SDL_MOUSEDEV device */
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60 mousedev = SDL_getenv("SDL_MOUSEDEV");
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61 if (!mousedev) {
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62 handle = open(mousedev, 0);
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63 }
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64
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65 /* Failed, try default device */
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66 if (handle < 0) {
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67 handle = open(DEVICE_NAME, 0);
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68 }
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69
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70 if (handle < 0) {
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71 handle = -1;
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72 return 0;
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73 }
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74
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75 /* Set non blocking mode */
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76 r = fcntl(handle, F_GETFL, 0);
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77 if (r < 0) {
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78 close(handle);
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79 handle = -1;
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80 return 0;
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81 }
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82
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83 r |= O_NDELAY;
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84
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85 r = fcntl(handle, F_SETFL, r);
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86 if (r < 0) {
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87 close(handle);
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88 handle = -1;
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89 return 0;
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90 }
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91
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92 prev_mouseb = 7;
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93 return 1;
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94 }
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95
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96 void
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97 SDL_AtariDevMouse_Close(void)
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98 {
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99 if (handle > 0) {
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100 close(handle);
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101 handle = -1;
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102 }
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103 }
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104
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105 static int
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106 atari_GetButton(int button)
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107 {
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108 switch (button) {
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109 case 0:
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110 return SDL_BUTTON_RIGHT;
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111 case 1:
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112 return SDL_BUTTON_MIDDLE;
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113 default:
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114 break;
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115 }
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116
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117 return SDL_BUTTON_LEFT;
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118 }
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119
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120 void
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121 SDL_AtariDevMouse_PostMouseEvents(_THIS, SDL_bool buttonEvents)
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122 {
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123 unsigned char buffer[3];
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124 int mousex, mousey;
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125
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126 if (handle < 0) {
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127 return;
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128 }
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129
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130 mousex = mousey = 0;
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131 while (read(handle, buffer, sizeof(buffer)) == sizeof(buffer)) {
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132 mouseb = buffer[0] & 7;
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133 mousex += (char) buffer[1];
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134 mousey += (char) buffer[2];
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135
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136 /* Mouse button events */
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137 if (buttonEvents && (mouseb != prev_mouseb)) {
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138 int i;
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139
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140 for (i = 0; i < 3; i++) {
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141 int curbutton, prevbutton;
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142
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143 curbutton = mouseb & (1 << i);
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144 prevbutton = prev_mouseb & (1 << i);
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145
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146 if (curbutton && !prevbutton) {
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147 SDL_PrivateMouseButton(SDL_RELEASED,
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148 atari_GetButton(i), 0, 0);
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149 }
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150 if (!curbutton && prevbutton) {
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151 SDL_PrivateMouseButton(SDL_PRESSED,
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152 atari_GetButton(i), 0, 0);
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153 }
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154 }
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155
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156 prev_mouseb = mouseb;
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157 }
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158 }
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159
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160 /* Mouse motion event */
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161 if (mousex || mousey) {
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162 SDL_PrivateMouseMotion(0, 1, mousex, -mousey);
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163 }
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164 }
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165
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166 /* vi: set ts=4 sw=4 expandtab: */