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annotate src/video/ataricommon/SDL_ataridevmouse.c @ 4106:12bb6311fd5d SDL-1.2

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Hans de Goede fixed bug #495 When running boswars: http://www.boswars.org/ on a machine with intel integrathed graphics it crashes when it tries to play the initial theora splashscreen video: X Error of failed request: BadAlloc (insufficient resources for operation) Major opcode of failed request: 140 (XVideo) Minor opcode of failed request: 19 () Serial number of failed request: 25 Current serial number in output stream: 26 boswars: xcb_xlib.c:41: xcb_xlib_lock: Assertion `!c->xlib.lock' failed. Aborted I recognized this problem from a few years back, when I encountered it while working on the Xv blitter for xmame. The problem is that for some reason creation the Xvport and XvImage succeeds, and failure (lack of resources / hw capability?) is only indicated during the first XvPut[Shm]Image. I've written a patch for SDL using the work around for this I developed for xmame (and which is still used successfully in xmame after many years of usage). I'll admit it isn't very pretty, but after investigating several possibilities this was the best option, any other fixes would need changes to the SDL api and abi.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 29 Dec 2007 02:23:48 +0000
parents 2405517b5eab
children 782fd950bd46 c121d94672cb a1b03ba2fcd0
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) 1997-2006 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 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 }