Mercurial > sdl-ios-xcode

annotate src/video/x11/SDL_x11touch.c @ 5004:0c72ae7b7cb2

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Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics. Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier() Added an atomic test adapted from code by Michael Davidsaver
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 Jan 2011 15:16:39 -0800
parents 1002d074d459
children 4913042e8572
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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 #include "SDL_x11video.h"
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1002d074d459 Renamed X11 touch files for consistency
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24 #include "SDL_x11touch.h"
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25 #include "../../events/SDL_touch_c.h"
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26
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27
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28 #ifdef SDL_INPUT_LINUXEV
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29 #include <linux/input.h>
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30 #include <fcntl.h>
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31 #endif
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32
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33 void
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34 X11_InitTouch(_THIS)
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35 {
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36 #ifdef SDL_INPUT_LINUXEV
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37 printf("Initializing touch...\n");
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38
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39 FILE *fd;
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40 fd = fopen("/proc/bus/input/devices","r");
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41
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42 char c;
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43 int i = 0;
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44 char line[256];
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45 char tstr[256];
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46 int vendor = -1,product = -1,event = -1;
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47 while(!feof(fd)) {
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48 if(fgets(line,256,fd) <=0) continue;
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49 //printf("%s",line);
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50 if(line[0] == '\n') {
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51 if(vendor == 1386){
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52 printf("Wacom... Assuming it is a touch device\n");
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53 sprintf(tstr,"/dev/input/event%i",event);
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54 printf("At location: %s\n",tstr);
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55
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56 SDL_Touch touch;
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57 touch.pressure_max = 0;
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58 touch.pressure_min = 0;
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59 touch.id = event;
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60
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61
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62 touch.driverdata = SDL_malloc(sizeof(EventTouchData));
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63 EventTouchData* data = (EventTouchData*)(touch.driverdata);
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64
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65 data->x = -1;
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66 data->y = -1;
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67 data->pressure = -1;
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68 data->finger = 0;
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69 data->up = SDL_FALSE;
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70
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71
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72 printf("Opening device...\n");
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73 //printf("New Touch - DataPtr: %i\n",data);
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74 data->eventStream = open(tstr,
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75 O_RDONLY | O_NONBLOCK);
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76 ioctl (data->eventStream, EVIOCGNAME (sizeof (tstr)), tstr);
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77 printf ("Reading From : %s\n", tstr);
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78
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79
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80
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81 int abs[5];
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82 ioctl(data->eventStream,EVIOCGABS(0),abs);
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83 touch.x_min = abs[1];
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84 touch.x_max = abs[2];
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85 touch.native_xres = touch.x_max - touch.x_min;
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86 ioctl(data->eventStream,EVIOCGABS(ABS_Y),abs);
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87 touch.y_min = abs[1];
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88 touch.y_max = abs[2];
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89 touch.native_yres = touch.y_max - touch.y_min;
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90 ioctl(data->eventStream,EVIOCGABS(ABS_PRESSURE),abs);
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91 touch.pressure_min = abs[1];
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92 touch.pressure_max = abs[2];
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93 touch.native_pressureres = touch.pressure_max - touch.pressure_min;
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94
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95 SDL_AddTouch(&touch, tstr);
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96 }
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97 vendor = -1;
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98 product = -1;
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99 event = -1;
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100 }
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101 else if(line[0] == 'I') {
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102 i = 1;
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103 while(line[i]) {
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104 sscanf(&line[i],"Vendor=%x",&vendor);
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105 sscanf(&line[i],"Product=%x",&product);
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106 i++;
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107 }
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108 }
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109 else if(line[0] == 'H') {
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110 i = 1;
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111 while(line[i]) {
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112 sscanf(&line[i],"event%d",&event);
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113 i++;
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114 }
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115 }
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116 }
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117
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118 close(fd);
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119 #endif
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120 }
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121
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122 void
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123 X11_QuitTouch(_THIS)
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124 {
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125 SDL_TouchQuit();
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126 }
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127
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128 /* vi: set ts=4 sw=4 expandtab: */