src/video/ataricommon/SDL_xbiosevents.c
changeset 305 9c6613983e85
child 331 e9278438fb3b
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304:ec53caed9fb2 305:9c6613983e85
       
     1 /*
       
     2     SDL - Simple DirectMedia Layer
       
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
       
     4 
       
     5     This library is free software; you can redistribute it and/or
       
     6     modify it under the terms of the GNU Library General Public
       
     7     License as published by the Free Software Foundation; either
       
     8     version 2 of the License, or (at your option) any later version.
       
     9 
       
    10     This library is distributed in the hope that it will be useful,
       
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
       
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       
    13     Library General Public License for more details.
       
    14 
       
    15     You should have received a copy of the GNU Library General Public
       
    16     License along with this library; if not, write to the Free
       
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
       
    18 
       
    19     Sam Lantinga
       
    20     slouken@libsdl.org
       
    21 */
       
    22 
       
    23 #ifdef SAVE_RCSID
       
    24 static char rcsid =
       
    25  "@(#) $Id$";
       
    26 #endif
       
    27 
       
    28 /*
       
    29  *	XBIOS mouse & joystick vectors
       
    30  *
       
    31  *	Patrice Mandin
       
    32  */
       
    33 
       
    34 #include <stdlib.h>
       
    35 #include <string.h>
       
    36 #include <mint/osbind.h>
       
    37 
       
    38 #include "SDL_events_c.h"
       
    39 #include "SDL_xbiosevents_c.h"
       
    40 #include "SDL_xbiosinterrupt_s.h"
       
    41 
       
    42 /* Variables */
       
    43 
       
    44 int SDL_AtariXbios_enabled=0;
       
    45 
       
    46 static _KBDVECS *kbdvecs;		/* Pointer to access vectors */
       
    47 static _KBDVECS sys_kbdvecs;	/* Backup of system vectors */
       
    48 static Uint16 atari_prevmouseb;	/* buttons */
       
    49 
       
    50 void SDL_AtariXbios_InstallVectors(int vectors_mask)
       
    51 {
       
    52 	void *oldpile;
       
    53 
       
    54 	/* Clear variables */
       
    55 	SDL_AtariXbios_mouseb =
       
    56 		SDL_AtariXbios_mousex =
       
    57 		SDL_AtariXbios_mousey =
       
    58 		SDL_AtariXbios_joystick =
       
    59 		atari_prevmouseb = 0;
       
    60 
       
    61 	/* Read IKBD vectors base */
       
    62 	kbdvecs=Kbdvbase();
       
    63 
       
    64 	/* Go to supervisor mode */
       
    65 	oldpile=(void *)Super(0);
       
    66 
       
    67 	/* Backup system vectors */
       
    68 	memcpy(&sys_kbdvecs, kbdvecs, sizeof(_KBDVECS));
       
    69 
       
    70 	/* Install our vector */
       
    71 	SDL_AtariXbios_Install(
       
    72 		kbdvecs,
       
    73 		(vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,
       
    74 		(vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL
       
    75 	);
       
    76 
       
    77 	/* Back to user mode */
       
    78 	Super(oldpile);
       
    79 
       
    80 	SDL_AtariXbios_enabled=1;
       
    81 }
       
    82 
       
    83 void SDL_AtariXbios_RestoreVectors(void)
       
    84 {
       
    85 	void *oldpile;
       
    86 
       
    87 	/* Go to supervisor mode */
       
    88 	oldpile=(void *)Super(NULL);
       
    89 
       
    90 	/* Reinstall system vector */
       
    91 	SDL_AtariXbios_Install(kbdvecs,sys_kbdvecs.mousevec,sys_kbdvecs.joyvec);
       
    92 
       
    93 	/* Back to user mode */
       
    94 	Super(oldpile);
       
    95 }
       
    96 
       
    97 static int atari_GetButton(int button)
       
    98 {
       
    99 	switch(button)
       
   100 	{
       
   101 		case 0:
       
   102 			return SDL_BUTTON_RIGHT;
       
   103 			break;
       
   104 		case 1:
       
   105 		default:
       
   106 			return SDL_BUTTON_LEFT;
       
   107 			break;
       
   108 	}
       
   109 }
       
   110 
       
   111 void SDL_AtariXbios_PostMouseEvents(_THIS)
       
   112 {
       
   113 	/* Mouse motion ? */
       
   114 	if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {
       
   115 		SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);
       
   116 		SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;
       
   117 	}
       
   118 	
       
   119 	/* Mouse button ? */
       
   120 	if (SDL_AtariXbios_mouseb != atari_prevmouseb) {
       
   121 		int i;
       
   122 
       
   123 		for (i=0;i<2;i++) {
       
   124 			int curbutton, prevbutton;
       
   125 
       
   126 			curbutton = SDL_AtariXbios_mouseb & (1<<i);
       
   127 			prevbutton = atari_prevmouseb & (1<<i);
       
   128 
       
   129 			if (curbutton & !prevbutton) {
       
   130 				SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
       
   131 			}
       
   132 			if (!curbutton & prevbutton) {
       
   133 				SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
       
   134 			}
       
   135 		}
       
   136 		atari_prevmouseb = SDL_AtariXbios_mouseb;
       
   137 	}
       
   138 }