1 /*

     2     SDL - Simple DirectMedia Layer

     3     Copyright (C) 1997-2006 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@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 i, 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 }