src/video/ataricommon/SDL_xbiosevents.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 04 Apr 2002 18:06:33 +0000
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Date: Thu, 04 Apr 2002 13:27:36 GMT+1 From: Patrice Mandin <pmandin@caramail.com> Subject: [SDL][PATCH] Atari mouse patch Just a patch to correct a studid bug where Mouse button events where not generated when pressing first button.
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/*
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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
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 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,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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/*
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 *	XBIOS mouse & joystick vectors
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 *
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 *	Patrice Mandin
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 */
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#include <stdlib.h>
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#include <string.h>
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#include <mint/osbind.h>
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#include "SDL_events_c.h"
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#include "SDL_xbiosevents_c.h"
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#include "SDL_xbiosinterrupt_s.h"
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/* Variables */
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int SDL_AtariXbios_enabled=0;
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static _KBDVECS *kbdvecs;		/* Pointer to access vectors */
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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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{
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	void *oldpile;
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	/* Clear variables */
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	SDL_AtariXbios_mouseb =
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		SDL_AtariXbios_mousex =
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		SDL_AtariXbios_mousey =
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		SDL_AtariXbios_joystick =
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		atari_prevmouseb = 0;
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	/* Read IKBD vectors base */
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	kbdvecs=Kbdvbase();
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	/* Go to supervisor mode */
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	oldpile=(void *)Super(0);
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	/* Backup system vectors */
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	memcpy(&sys_kbdvecs, kbdvecs, sizeof(_KBDVECS));
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	/* Install our vector */
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	SDL_AtariXbios_Install(
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		kbdvecs,
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		(vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
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		(vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
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	);
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	/* Back to user mode */
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	Super(oldpile);
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	SDL_AtariXbios_enabled=1;
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}
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void SDL_AtariXbios_RestoreVectors(void)
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{
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	void *oldpile;
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	/* Go to supervisor mode */
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	oldpile=(void *)Super(NULL);
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	/* 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 */
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	Super(oldpile);
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}
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static int atari_GetButton(int button)
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{
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	switch(button)
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	{
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		case 0:
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			return SDL_BUTTON_RIGHT;
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			break;
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		case 1:
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		default:
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			return SDL_BUTTON_LEFT;
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			break;
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	}
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}
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void SDL_AtariXbios_PostMouseEvents(_THIS)
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{
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	/* Mouse motion ? */
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	if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
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		SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
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		SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
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	}
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	/* Mouse button ? */
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	if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
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		int i;
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		for (i=0;i<2;i++) {
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			int curbutton, prevbutton;
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			curbutton = SDL_AtariXbios_mouseb & (1<<i);
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			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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			}
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			if (!curbutton && prevbutton) {
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				SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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			}
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		}
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		atari_prevmouseb = SDL_AtariXbios_mouseb;
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	}
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}