SDL_ataridevmouse.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 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"
/*
MiNT /dev/mouse driver
Patrice Mandin
*/
#include <fcntl.h>
#include <unistd.h>
#include "../../events/SDL_events_c.h"
#include "SDL_ataridevmouse_c.h"
/* Defines */
#define DEVICE_NAME "/dev/mouse"
/* Local variables */
static int handle = -1;
static int mouseb, prev_mouseb;
/* Functions */
int SDL_AtariDevMouse_Open(void)
{
int r;
const char *mousedev;
/*
TODO: Fix the MiNT device driver, that locks mouse for other
applications, so this is disabled till fixed
*/
return 0;
/* First, try SDL_MOUSEDEV device */
mousedev = SDL_getenv("SDL_MOUSEDEV");
if (!mousedev) {
handle = open(mousedev, 0);
}
/* Failed, try default device */
if (handle<0) {
handle = open(DEVICE_NAME, 0);
}
if (handle<0) {
handle = -1;
return 0;
}
/* Set non blocking mode */
r = fcntl(handle, F_GETFL, 0);
if (r<0) {
close(handle);
handle = -1;
return 0;
}
r |= O_NDELAY;
r = fcntl(handle, F_SETFL, r);
if (r<0) {
close(handle);
handle = -1;
return 0;
}
prev_mouseb = 7;
return 1;
}
void SDL_AtariDevMouse_Close(void)
{
if (handle>0) {
close(handle);
handle = -1;
}
}
static int atari_GetButton(int button)
{
switch(button)
{
case 0:
return SDL_BUTTON_RIGHT;
case 1:
return SDL_BUTTON_MIDDLE;
default:
break;
}
return SDL_BUTTON_LEFT;
}
void SDL_AtariDevMouse_PostMouseEvents(_THIS, SDL_bool buttonEvents)
{
unsigned char buffer[3];
int mousex, mousey;
if (handle<0) {
return;
}
mousex = mousey = 0;
while (read(handle, buffer, sizeof(buffer))==sizeof(buffer)) {
mouseb = buffer[0] & 7;
mousex += (char) buffer[1];
mousey += (char) buffer[2];
/* Mouse button events */
if (buttonEvents && (mouseb != prev_mouseb)) {
int i;
for (i=0;i<3;i++) {
int curbutton, prevbutton;
curbutton = mouseb & (1<<i);
prevbutton = prev_mouseb & (1<<i);
if (curbutton && !prevbutton) {
SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
}
if (!curbutton && prevbutton) {
SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
}
}
prev_mouseb = mouseb;
}
}
/* Mouse motion event */
if (mousex || mousey) {
SDL_PrivateMouseMotion(0, 1, mousex, -mousey);
}
}