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      1 /*
      2     SDL - Simple DirectMedia Layer
      3     Copyright (C) 1997-2012 Sam Lantinga
      4 
      5     This library is free software; you can redistribute it and/or
      6     modify it under the terms of the GNU Lesser General Public
      7     License as published by the Free Software Foundation; either
      8     version 2.1 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     Lesser General Public License for more details.
     14 
     15     You should have received a copy of the GNU Lesser General Public
     16     License along with this library; if not, write to the Free Software
     17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     18 
     19     Sam Lantinga
     20     slouken (at) libsdl.org
     21 */
     22 #include "SDL_config.h"
     23 
     24 /*
     25  *	Atari keyboard events manager, using hardware IKBD
     26  *
     27  *	Patrice Mandin
     28  */
     29 
     30 /* Mint includes */
     31 #include <mint/osbind.h>
     32 
     33 #include "../../events/SDL_sysevents.h"
     34 #include "../../events/SDL_events_c.h"
     35 
     36 #include "SDL_atarikeys.h"
     37 #include "SDL_atarievents_c.h"
     38 #include "SDL_ikbdinterrupt_s.h"
     39 
     40 #define KEY_PRESSED		0xff
     41 #define KEY_UNDEFINED	0x80
     42 #define KEY_RELEASED	0x00
     43 
     44 static Uint16 atari_prevmouseb;	/* save state of mouse buttons */
     45 
     46 void AtariIkbd_InitOSKeymap(_THIS)
     47 {
     48 	SDL_memset((void *) SDL_AtariIkbd_keyboard, KEY_UNDEFINED, sizeof(SDL_AtariIkbd_keyboard));
     49 
     50 	/* Now install our handler */
     51 	SDL_AtariIkbd_mouseb = SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
     52 	atari_prevmouseb = 0;
     53 
     54 	Supexec(SDL_AtariIkbdInstall);
     55 }
     56 
     57 static int atari_GetButton(int button)
     58 {
     59 	switch(button)
     60 	{
     61 		case 0:
     62 			return SDL_BUTTON_RIGHT;
     63 			break;
     64 		case 1:
     65 		default:
     66 			return SDL_BUTTON_LEFT;
     67 			break;
     68 	}
     69 }
     70 
     71 void AtariIkbd_PumpEvents(_THIS)
     72 {
     73 	int i;
     74 	SDL_keysym keysym;
     75 
     76 	/*--- Send keyboard events ---*/
     77 
     78 	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
     79 		/* Key pressed ? */
     80 		if (SDL_AtariIkbd_keyboard[i]==KEY_PRESSED) {
     81 			SDL_PrivateKeyboard(SDL_PRESSED,
     82 				SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));
     83 			SDL_AtariIkbd_keyboard[i]=KEY_UNDEFINED;
     84 		}
     85 
     86 		/* Key released ? */
     87 		if (SDL_AtariIkbd_keyboard[i]==KEY_RELEASED) {
     88 			SDL_PrivateKeyboard(SDL_RELEASED,
     89 				SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));
     90 			SDL_AtariIkbd_keyboard[i]=KEY_UNDEFINED;
     91 		}
     92 	}
     93 
     94 	/*--- Send mouse events ---*/
     95 
     96 	/* Mouse motion ? */
     97 	if (SDL_AtariIkbd_mousex || SDL_AtariIkbd_mousey) {
     98 		SDL_PrivateMouseMotion(0, 1, SDL_AtariIkbd_mousex, SDL_AtariIkbd_mousey);
     99 		SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
    100 	}
    101 
    102 	/* Mouse button ? */
    103 	if (SDL_AtariIkbd_mouseb != atari_prevmouseb) {
    104 		for (i=0;i<2;i++) {
    105 			int curbutton, prevbutton;
    106 
    107 			curbutton = SDL_AtariIkbd_mouseb & (1<<i);
    108 			prevbutton = atari_prevmouseb & (1<<i);
    109 
    110 			if (curbutton && !prevbutton) {
    111 				SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
    112 			}
    113 			if (!curbutton && prevbutton) {
    114 				SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
    115 			}
    116 		}
    117 		atari_prevmouseb = SDL_AtariIkbd_mouseb;
    118 	}
    119 }
    120 
    121 void AtariIkbd_ShutdownEvents(void)
    122 {
    123 	Supexec(SDL_AtariIkbdUninstall);
    124 }
    125