src/video/ataricommon/SDL_biosevents.c
changeset 281 c5010ab8ba35
child 284 d8b7eae78652
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/ataricommon/SDL_biosevents.c	Sun Feb 17 19:54:28 2002 +0000
@@ -0,0 +1,187 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/*
+ *	Atari keyboard events manager, using BIOS
+ *
+ *	Patrice Mandin
+ */
+
+#include <string.h>
+
+/* Mint includes */
+#include <mint/osbind.h>
+
+#include "SDL.h"
+#include "SDL_sysevents.h"
+#include "SDL_events_c.h"
+
+#include "SDL_atarikeys.h"
+#include "SDL_xbiosmouseevents_c.h"
+
+/* To save state of keyboard */
+#define ATARIBIOS_MAXKEYS 128
+
+static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
+static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
+static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];
+
+/* Special keys state */
+enum {
+	K_RSHIFT=0,
+	K_LSHIFT,
+	K_CTRL,
+	K_ALT,
+	K_CAPSLOCK,
+	K_CLRHOME,
+	K_INSERT
+};
+
+/* The translation tables from a console scancode to a SDL keysym */
+static SDLKey keymap[ATARIBIOS_MAXKEYS];
+
+static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym);
+static void UpdateSpecialKeys(int special_keys_state);
+
+void AtariBios_InitOSKeymap(_THIS)
+{
+	int i;
+
+	memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
+	memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
+
+	/* Initialize keymap */
+	for ( i=0; i<sizeof(keymap); i++ )
+		keymap[i] = SDLK_UNKNOWN;
+
+	/* Functions keys */
+	for ( i = 0; i<10; i++ )
+		keymap[SCANCODE_F1 + i] = SDLK_F1+i;
+
+	/* Cursor keypad */
+	keymap[SCANCODE_HELP] = SDLK_HELP;
+	keymap[SCANCODE_UNDO] = SDLK_UNDO;
+	keymap[SCANCODE_INSERT] = SDLK_INSERT;
+	keymap[SCANCODE_CLRHOME] = SDLK_HOME;
+	keymap[SCANCODE_UP] = SDLK_UP;
+	keymap[SCANCODE_DOWN] = SDLK_DOWN;
+	keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
+	keymap[SCANCODE_LEFT] = SDLK_LEFT;
+
+	/* Special keys */
+	keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
+	keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
+	keymap[SCANCODE_TAB] = SDLK_TAB;
+	keymap[SCANCODE_ENTER] = SDLK_RETURN;
+	keymap[SCANCODE_DELETE] = SDLK_DELETE;
+	keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
+	keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
+	keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
+	keymap[SCANCODE_LEFTALT] = SDLK_LALT;
+	keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
+
+	AtariXbios_InstallMouseVector();
+}
+
+void AtariBios_PumpEvents(_THIS)
+{
+	int i;
+	SDL_keysym keysym;
+
+	/* Update pressed keys */
+	memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
+
+	while (Bconstat(_CON)) {
+		unsigned long key_pressed;
+		unsigned char asciicode, scancode;
+
+		key_pressed=Bconin(_CON);
+
+		asciicode = key_pressed;
+		scancode = key_pressed >> 16;
+
+		bios_currentkeyboard[scancode]=0xFF;
+		bios_currentascii[scancode]=asciicode;
+	}
+
+	/* Read special keys */
+	UpdateSpecialKeys(Kbshift(-1));
+
+	/* Now generate events */
+	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
+		/* Key pressed ? */
+		if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
+			SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(i, bios_currentascii[i], &keysym));
+			
+		/* Key unpressed ? */
+		if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
+			SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(i, 0, &keysym));
+	}
+
+	AtariXbios_PostMouseEvents(this);
+
+	/* Will be previous table */
+	memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);
+}
+
+static void UpdateSpecialKeys(int special_keys_state)
+{
+#define UPDATE_SPECIAL_KEYS(numbit,scancode) \
+	{	\
+		if (special_keys_state & (1<<(numbit))) { \
+			bios_currentkeyboard[scancode]=0xFF; \
+			bios_currentascii[scancode]=0; \
+		}	\
+	}
+
+	UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
+	UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
+	UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
+	UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
+	UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
+}
+
+static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym)
+{
+	/* Set the keysym information */
+	keysym->scancode = scancode;
+
+	if (asciicode)
+		keysym->sym = asciicode;		
+	else
+		keysym->sym = keymap[scancode];
+
+	keysym->mod = KMOD_NONE;
+	keysym->unicode = 0;
+
+	return(keysym);
+}
+
+void AtariBios_ShutdownEvents(void)
+{
+	AtariXbios_RestoreMouseVector();
+}