SDL_xbiosevents.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
slouken@libsdl.org
*/
/*
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* XBIOS mouse & joystick vectors
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*
* Patrice Mandin
*/
#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;
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/* Local variables */
static _KBDVECS *kbdvecs; /* Pointer to access system vectors */
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static Uint16 atari_prevmouseb; /* buttons */
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/* Functions */
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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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if (vectors_mask==0) {
SDL_AtariXbios_enabled=0;
return;
}
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/* Read IKBD vectors base */
kbdvecs=Kbdvbase();
/* Go to supervisor mode */
oldpile=(void *)Super(0);
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/* Install our vectors */
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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;
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if (SDL_AtariXbios_enabled==0) {
return;
}
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/* Read IKBD vectors base */
kbdvecs=Kbdvbase();
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/* Go to supervisor mode */
oldpile=(void *)Super(NULL);
/* Reinstall system vector */
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SDL_AtariXbios_Restore(kbdvecs);
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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, SDL_bool buttonEvents)
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if (SDL_AtariXbios_enabled==0) {
return;
}
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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 ? */
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if (buttonEvents && (SDL_AtariXbios_mouseb != atari_prevmouseb)) {
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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;
}
}