This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_x11touch.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2010 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_x11video.h"
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#include "SDL_x11touch.h"
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#include "../../events/SDL_touch_c.h"
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#ifdef SDL_INPUT_LINUXEV
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#include <linux/input.h>
#include <fcntl.h>
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#endif
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void
X11_InitTouch(_THIS)
{
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#ifdef SDL_INPUT_LINUXEV
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FILE *fd;
fd = fopen("/proc/bus/input/devices","r");
char c;
int i = 0;
char line[256];
char tstr[256];
int vendor = -1,product = -1,event = -1;
while(!feof(fd)) {
if(fgets(line,256,fd) <=0) continue;
if(line[0] == '\n') {
if(vendor == 1386){
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/*printf("Wacom... Assuming it is a touch device\n");*/
/*sprintf(tstr,"/dev/input/event%i",event);*/
/*printf("At location: %s\n",tstr);*/
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SDL_Touch touch;
touch.pressure_max = 0;
touch.pressure_min = 0;
touch.id = event;
touch.driverdata = SDL_malloc(sizeof(EventTouchData));
EventTouchData* data = (EventTouchData*)(touch.driverdata);
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data->x = -1;
data->y = -1;
data->pressure = -1;
data->finger = 0;
data->up = SDL_FALSE;
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data->eventStream = open(tstr,
O_RDONLY | O_NONBLOCK);
ioctl (data->eventStream, EVIOCGNAME (sizeof (tstr)), tstr);
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int abs[5];
ioctl(data->eventStream,EVIOCGABS(0),abs);
touch.x_min = abs[1];
touch.x_max = abs[2];
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touch.native_xres = touch.x_max - touch.x_min;
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ioctl(data->eventStream,EVIOCGABS(ABS_Y),abs);
touch.y_min = abs[1];
touch.y_max = abs[2];
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touch.native_yres = touch.y_max - touch.y_min;
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ioctl(data->eventStream,EVIOCGABS(ABS_PRESSURE),abs);
touch.pressure_min = abs[1];
touch.pressure_max = abs[2];
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touch.native_pressureres = touch.pressure_max - touch.pressure_min;
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SDL_AddTouch(&touch, tstr);
}
vendor = -1;
product = -1;
event = -1;
}
else if(line[0] == 'I') {
i = 1;
while(line[i]) {
sscanf(&line[i],"Vendor=%x",&vendor);
sscanf(&line[i],"Product=%x",&product);
i++;
}
}
else if(line[0] == 'H') {
i = 1;
while(line[i]) {
sscanf(&line[i],"event%d",&event);
i++;
}
}
}
close(fd);
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#endif
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}
void
X11_QuitTouch(_THIS)
{
SDL_TouchQuit();
}
/* vi: set ts=4 sw=4 expandtab: */