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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 BIOS
     26  *
     27  *	Patrice Mandin
     28  */
     29 
     30 /* Mint includes */
     31 #include <mint/osbind.h>
     32 #include <mint/cookie.h>
     33 
     34 #include "../../events/SDL_sysevents.h"
     35 #include "../../events/SDL_events_c.h"
     36 
     37 #include "SDL_atarikeys.h"
     38 #include "SDL_atarievents_c.h"
     39 #include "SDL_xbiosevents_c.h"
     40 #include "SDL_ataridevmouse_c.h"
     41 
     42 static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
     43 static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
     44 static SDL_bool use_dev_mouse = SDL_FALSE;
     45 
     46 static void UpdateSpecialKeys(int special_keys_state);
     47 
     48 void AtariBios_InitOSKeymap(_THIS)
     49 {
     50 	int vectors_mask;
     51 /*	unsigned long dummy;*/
     52 
     53 	SDL_memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
     54 	SDL_memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
     55 
     56 	use_dev_mouse = (SDL_AtariDevMouse_Open()!=0) ? SDL_TRUE : SDL_FALSE;
     57 
     58 	vectors_mask = ATARI_XBIOS_JOYSTICKEVENTS;	/* XBIOS joystick events */
     59 	if (!use_dev_mouse) {
     60 		vectors_mask |= ATARI_XBIOS_MOUSEEVENTS;	/* XBIOS mouse events */
     61 	}
     62 /*	if (Getcookie(C_MiNT, &dummy)==C_FOUND) {
     63 		vectors_mask = 0;
     64 	}*/
     65 
     66 	SDL_AtariXbios_InstallVectors(vectors_mask);
     67 }
     68 
     69 void AtariBios_PumpEvents(_THIS)
     70 {
     71 	int i;
     72 	SDL_keysym keysym;
     73 
     74 	/* Update pressed keys */
     75 	SDL_memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
     76 
     77 	while (Bconstat(_CON)) {
     78 		unsigned long key_pressed;
     79 		key_pressed=Bconin(_CON);
     80 		bios_currentkeyboard[(key_pressed>>16)&(ATARIBIOS_MAXKEYS-1)]=0xFF;
     81 	}
     82 
     83 	/* Read special keys */
     84 	UpdateSpecialKeys(Kbshift(-1));
     85 
     86 	/* Now generate events */
     87 	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
     88 		/* Key pressed ? */
     89 		if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
     90 			SDL_PrivateKeyboard(SDL_PRESSED,
     91 				SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));
     92 
     93 		/* Key unpressed ? */
     94 		if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
     95 			SDL_PrivateKeyboard(SDL_RELEASED,
     96 				SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));
     97 	}
     98 
     99 	if (use_dev_mouse) {
    100 		SDL_AtariDevMouse_PostMouseEvents(this, SDL_TRUE);
    101 	} else {
    102 		SDL_AtariXbios_PostMouseEvents(this, SDL_TRUE);
    103 	}
    104 
    105 	/* Will be previous table */
    106 	SDL_memcpy(bios_previouskeyboard, bios_currentkeyboard, sizeof(bios_previouskeyboard));
    107 }
    108 
    109 static void UpdateSpecialKeys(int special_keys_state)
    110 {
    111 #define UPDATE_SPECIAL_KEYS(numbit,scancode) \
    112 	{	\
    113 		if (special_keys_state & (1<<(numbit))) { \
    114 			bios_currentkeyboard[scancode]=0xFF; \
    115 		}	\
    116 	}
    117 
    118 	UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
    119 	UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
    120 	UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
    121 	UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
    122 	UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
    123 }
    124 
    125 void AtariBios_ShutdownEvents(void)
    126 {
    127 	SDL_AtariXbios_RestoreVectors();
    128 	if (use_dev_mouse) {
    129 		SDL_AtariDevMouse_Close();
    130 	}
    131 }
    132