SDL_xbiosevents.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/*
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* XBIOS mouse & joystick vectors
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*
* Patrice Mandin
*/
#include <stdlib.h>
#include <string.h>
#include <mint/osbind.h>
#include "SDL_events_c.h"
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#include "SDL_xbiosevents_c.h"
#include "SDL_xbiosinterrupt_s.h"
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/* Variables */
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int SDL_AtariXbios_enabled=0;
static _KBDVECS *kbdvecs; /* Pointer to access vectors */
static _KBDVECS sys_kbdvecs; /* Backup of system vectors */
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static Uint16 atari_prevmouseb; /* buttons */
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void SDL_AtariXbios_InstallVectors(int vectors_mask)
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{
void *oldpile;
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/* Clear variables */
SDL_AtariXbios_mouseb =
SDL_AtariXbios_mousex =
SDL_AtariXbios_mousey =
SDL_AtariXbios_joystick =
atari_prevmouseb = 0;
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/* Read IKBD vectors base */
kbdvecs=Kbdvbase();
/* Go to supervisor mode */
oldpile=(void *)Super(0);
/* Backup system vectors */
memcpy(&sys_kbdvecs, kbdvecs, sizeof(_KBDVECS));
/* Install our vector */
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SDL_AtariXbios_Install(
kbdvecs,
(vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
(vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
);
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/* Back to user mode */
Super(oldpile);
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SDL_AtariXbios_enabled=1;
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void SDL_AtariXbios_RestoreVectors(void)
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{
void *oldpile;
/* Go to supervisor mode */
oldpile=(void *)Super(NULL);
/* Reinstall system vector */
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SDL_AtariXbios_Install(kbdvecs,sys_kbdvecs.mousevec,sys_kbdvecs.joyvec);
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/* Back to user mode */
Super(oldpile);
}
static int atari_GetButton(int button)
{
switch(button)
{
case 0:
return SDL_BUTTON_RIGHT;
break;
case 1:
default:
return SDL_BUTTON_LEFT;
break;
}
}
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void SDL_AtariXbios_PostMouseEvents(_THIS)
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{
/* Mouse motion ? */
if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
}
/* Mouse button ? */
if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
int i;
for (i=0;i<2;i++) {
int curbutton, prevbutton;
curbutton = SDL_AtariXbios_mouseb & (1<<i);
prevbutton = atari_prevmouseb & (1<<i);
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if (curbutton && !prevbutton) {
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SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
}
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if (!curbutton && prevbutton) {
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SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
}
}
atari_prevmouseb = SDL_AtariXbios_mouseb;
}
}