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annotate src/video/ataricommon/SDL_ataridevmouse.c @ 4249:429c8dd3175d SDL-1.2

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Fixed bug #713 Don't clamp the mouse coordinates to the video surface size, instead clamp them to the last known window size. This allows users to get the correct mouse coordinates even if they don't call SDL_SetVideoMode() in response to an SDL_VIDEORESIZE event (used as a hack to retain the OpenGL context on Windows and Linux after a window resize)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 27 Sep 2009 05:18:43 +0000
parents a1b03ba2fcd0
children
rev   line source
1420
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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 SDL_AtariDevMouse_Open(void)
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48 {
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49 int r;
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50 const char *mousedev;
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51
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52 /*
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53 TODO: Fix the MiNT device driver, that locks mouse for other
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54 applications, so this is disabled till fixed
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55 */
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56 return 0;
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57
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58 /* First, try SDL_MOUSEDEV device */
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59 mousedev = SDL_getenv("SDL_MOUSEDEV");
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60 if (!mousedev) {
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61 handle = open(mousedev, 0);
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62 }
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63
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64 /* Failed, try default device */
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65 if (handle<0) {
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66 handle = open(DEVICE_NAME, 0);
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67 }
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68
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69 if (handle<0) {
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70 handle = -1;
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71 return 0;
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72 }
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73
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74 /* Set non blocking mode */
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75 r = fcntl(handle, F_GETFL, 0);
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76 if (r<0) {
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77 close(handle);
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78 handle = -1;
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79 return 0;
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80 }
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81
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82 r |= O_NDELAY;
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83
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84 r = fcntl(handle, F_SETFL, r);
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85 if (r<0) {
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86 close(handle);
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87 handle = -1;
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88 return 0;
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89 }
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90
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91 prev_mouseb = 7;
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92 return 1;
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93 }
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94
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95 void SDL_AtariDevMouse_Close(void)
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96 {
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97 if (handle>0) {
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98 close(handle);
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99 handle = -1;
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100 }
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101 }
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102
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103 static int atari_GetButton(int button)
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104 {
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105 switch(button)
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106 {
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107 case 0:
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108 return SDL_BUTTON_RIGHT;
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109 case 1:
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110 return SDL_BUTTON_MIDDLE;
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111 default:
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112 break;
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113 }
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114
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115 return SDL_BUTTON_LEFT;
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116 }
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117
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118 void SDL_AtariDevMouse_PostMouseEvents(_THIS, SDL_bool buttonEvents)
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119 {
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120 unsigned char buffer[3];
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121 int mousex, mousey;
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122
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123 if (handle<0) {
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124 return;
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125 }
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126
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127 mousex = mousey = 0;
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128 while (read(handle, buffer, sizeof(buffer))==sizeof(buffer)) {
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129 mouseb = buffer[0] & 7;
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130 mousex += (char) buffer[1];
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131 mousey += (char) buffer[2];
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132
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133 /* Mouse button events */
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134 if (buttonEvents && (mouseb != prev_mouseb)) {
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135 int i;
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136
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137 for (i=0;i<3;i++) {
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138 int curbutton, prevbutton;
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139
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140 curbutton = mouseb & (1<<i);
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141 prevbutton = prev_mouseb & (1<<i);
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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 if (!curbutton && prevbutton) {
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147 SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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148 }
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149 }
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150
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151 prev_mouseb = mouseb;
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152 }
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153 }
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154
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155 /* Mouse motion event */
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156 if (mousex || mousey) {
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157 SDL_PrivateMouseMotion(0, 1, mousex, -mousey);
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158 }
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159 }