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annotate src/video/ataricommon/SDL_ataridevmouse.c @ 4197:1bf6585720e9 SDL-1.2

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Use loop to allocate needed buffers, instead of code duplication. Add missing header.
author Patrice Mandin <patmandin@gmail.com>
date Sat, 19 Sep 2009 21:58:59 +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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a1b03ba2fcd0 Updated copyright date
Sam Lantinga <slouken@libsdl.org>
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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 }