src/video/gem/SDL_gemevents.c - third_party/sdl - Git at Google

 /*
     SDL - Simple DirectMedia Layer
     Copyright (C) 1997-2009 Sam Lantinga

     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 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
     Lesser General Public License for more details.

     You should have received a copy of the GNU Lesser General Public
     License along with this library; if not, write to the Free Software
     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

     Sam Lantinga
     slouken@libsdl.org
 */
 #include "SDL_config.h"

 /*
  * GEM SDL video driver implementation
  * inspired from the Dummy SDL driver
  *
  * Patrice Mandin
  * and work from
  * Olivier Landemarre, Johan Klockars, Xavier Joubert, Claude Attard
  */

 #include <gem.h>

 #include "../../events/SDL_sysevents.h"
 #include "../../events/SDL_events_c.h"
 #include "SDL_gemvideo.h"
 #include "SDL_gemevents_c.h"
 #include "../ataricommon/SDL_atarikeys.h"	/* for keyboard scancodes */
 #include "../ataricommon/SDL_atarievents_c.h"
 #include "../ataricommon/SDL_xbiosevents_c.h"
 #include "../ataricommon/SDL_ataridevmouse_c.h"

 /* Variables */

 static unsigned char gem_currentkeyboard[ATARIBIOS_MAXKEYS];
 static unsigned char gem_previouskeyboard[ATARIBIOS_MAXKEYS];

 /* Functions prototypes */

 static int do_messages(_THIS, short *message);
 static void do_keyboard(short kc, short ks);
 static void do_mouse(_THIS, short mx, short my, short mb, short ks);

 /* Functions */

 void GEM_InitOSKeymap(_THIS)
 {
 	SDL_memset(gem_currentkeyboard, 0, sizeof(gem_currentkeyboard));
 	SDL_memset(gem_previouskeyboard, 0, sizeof(gem_previouskeyboard));

 	/* Mouse init */
 	GEM_mouse_relative = SDL_FALSE;

 	SDL_Atari_InitInternalKeymap(this);
 }

 void GEM_PumpEvents(_THIS)
 {
 	short mousex, mousey, mouseb, dummy;
 	short kstate, prevkc, prevks;
 	int i;
 	SDL_keysym	keysym;

 	SDL_memset(gem_currentkeyboard,0,sizeof(gem_currentkeyboard));
 	prevkc = prevks = 0;

 	for (;;)
 	{
 		int quit, resultat, event_mask, mouse_event;
 		short buffer[8], kc;
 		short x2,y2,w2,h2;

 		quit =
 			mouse_event =
 			x2=y2=w2=h2 = 0;

 		event_mask = MU_MESAG|MU_TIMER|MU_KEYBD;
 		if (!GEM_fullscreen && (GEM_handle>=0)) {
 			wind_get (GEM_handle, WF_WORKXYWH, &x2, &y2, &w2, &h2);
 			event_mask |= MU_M1;
 			mouse_event = ( (SDL_GetAppState() & SDL_APPMOUSEFOCUS)
 				== SDL_APPMOUSEFOCUS) ? MO_LEAVE : MO_ENTER;
 		}

 		resultat = evnt_multi(
 			event_mask,
 			0,0,0,
 			mouse_event,x2,y2,w2,h2,
 			0,0,0,0,0,
 			buffer,
 			10,
 			&dummy,&dummy,&dummy,&kstate,&kc,&dummy
 		);

 		/* Message event ? */
 		if (resultat & MU_MESAG)
 			quit = do_messages(this, buffer);

 		/* Keyboard event ? */
 		if (resultat & MU_KEYBD) {
 			if ((prevkc != kc) || (prevks != kstate)) {
 				do_keyboard(kc,kstate);
 			} else {
 				/* Avoid looping, if repeating same key */
 				break;
 			}
 		}

 		/* Mouse entering/leaving window */
 		if (resultat & MU_M1) {
 			if (this->input_grab == SDL_GRAB_OFF) {
 				/* Switch mouse focus state */
 				SDL_PrivateAppActive((mouse_event == MO_ENTER),
 					SDL_APPMOUSEFOCUS);
 			}
 			GEM_CheckMouseMode(this);
 		}

 		/* Timer event ? */
 		if ((resultat & MU_TIMER) || quit)
 			break;
 	}

 	/* Update mouse */
 	graf_mkstate(&mousex, &mousey, &mouseb, &kstate);
 	do_mouse(this, mousex, mousey, mouseb, kstate);

 	/* Now generate keyboard events */
 	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
 		/* Key pressed ? */
 		if (gem_currentkeyboard[i] && !gem_previouskeyboard[i])
 			SDL_PrivateKeyboard(SDL_PRESSED,
 				SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));

 		/* Key unpressed ? */
 		if (gem_previouskeyboard[i] && !gem_currentkeyboard[i])
 			SDL_PrivateKeyboard(SDL_RELEASED,
 				SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));
 	}

 	SDL_memcpy(gem_previouskeyboard,gem_currentkeyboard,sizeof(gem_previouskeyboard));

 	/* Refresh window name ? */
 	if (GEM_refresh_name) {
 		const char *window_name =
 			(SDL_GetAppState() & SDL_APPACTIVE)
 			? GEM_title_name : GEM_icon_name;
 		if (window_name) {
 			wind_set(GEM_handle,WF_NAME,
 				(short)(((unsigned long)window_name)>>16),
 				(short)(((unsigned long)window_name) & 0xffff),
 				0,0);
 		}
 		GEM_refresh_name = SDL_FALSE;
 	}
 }

 static int do_messages(_THIS, short *message)
 {
 	int quit, posted, check_mouse_mode;
 	short x2,y2,w2,h2;

 	quit = check_mouse_mode = 0;
 	switch (message[0]) {
 		case WM_CLOSED:
 		case AP_TERM:
 			posted = SDL_PrivateQuit();
 			quit=1;
 			break;
 		case WM_MOVED:
 			wind_set(message[3],WF_CURRXYWH,message[4],message[5],message[6],message[7]);
 			break;
 		case WM_TOPPED:
 			wind_set(message[3],WF_TOP,message[4],0,0,0);
 			/* Continue with TOP event processing */
 		case WM_ONTOP:
 			SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
 			if (VDI_setpalette) {
 				VDI_setpalette(this, VDI_curpalette);
 			}
 			check_mouse_mode = 1;
 			break;
 		case WM_REDRAW:
 			if (!GEM_lock_redraw) {
 				GEM_wind_redraw(this, message[3],&message[4]);
 			}
 			break;
 		case WM_ICONIFY:
 		case WM_ALLICONIFY:
 			wind_set(message[3],WF_ICONIFY,message[4],message[5],message[6],message[7]);
 			/* If we're active, make ourselves inactive */
 			if ( SDL_GetAppState() & SDL_APPACTIVE ) {
 				/* Send an internal deactivate event */
 				SDL_PrivateAppActive(0, SDL_APPACTIVE);
 			}
 			/* Update window title */
 			if (GEM_refresh_name && GEM_icon_name) {
 				wind_set(GEM_handle,WF_NAME,(short)(((unsigned long)GEM_icon_name)>>16),(short)(((unsigned long)GEM_icon_name) & 0xffff),0,0);
 				GEM_refresh_name = SDL_FALSE;
 			}
 			check_mouse_mode = 1;
 			break;
 		case WM_UNICONIFY:
 			wind_set(message[3],WF_UNICONIFY,message[4],message[5],message[6],message[7]);
 			/* If we're not active, make ourselves active */
 			if ( !(SDL_GetAppState() & SDL_APPACTIVE) ) {
 				/* Send an internal activate event */
 				SDL_PrivateAppActive(1, SDL_APPACTIVE);
 			}
 			if (GEM_refresh_name && GEM_title_name) {
 				wind_set(GEM_handle,WF_NAME,(short)(((unsigned long)GEM_title_name)>>16),(short)(((unsigned long)GEM_title_name) & 0xffff),0,0);
 				GEM_refresh_name = SDL_FALSE;
 			}
 			check_mouse_mode = 1;
 			break;
 		case WM_SIZED:
 			wind_set (message[3], WF_CURRXYWH, message[4], message[5], message[6], message[7]);
 			wind_get (message[3], WF_WORKXYWH, &x2, &y2, &w2, &h2);
 			GEM_win_fulled = SDL_FALSE;		/* Cancel maximized flag */
 			GEM_lock_redraw = SDL_TRUE;		/* Prevent redraw till buffers resized */
 			SDL_PrivateResize(w2, h2);
 			break;
 		case WM_FULLED:
 			{
 				short x,y,w,h;

 				if (GEM_win_fulled) {
 					wind_get (message[3], WF_PREVXYWH, &x, &y, &w, &h);
 					GEM_win_fulled = SDL_FALSE;
 				} else {
 					x = GEM_desk_x;
 					y = GEM_desk_y;
 					w = GEM_desk_w;
 					h = GEM_desk_h;
 					GEM_win_fulled = SDL_TRUE;
 				}
 				wind_set (message[3], WF_CURRXYWH, x, y, w, h);
 				wind_get (message[3], WF_WORKXYWH, &x2, &y2, &w2, &h2);
 				GEM_lock_redraw = SDL_TRUE;		/* Prevent redraw till buffers resized */
 				SDL_PrivateResize(w2, h2);
 			}
 			break;
 		case WM_BOTTOMED:
 			wind_set(message[3],WF_BOTTOM,0,0,0,0);
 			/* Continue with BOTTOM event processing */
 		case WM_UNTOPPED:
 			SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);
 			if (VDI_setpalette) {
 				VDI_setpalette(this, VDI_oldpalette);
 			}
 			check_mouse_mode = 1;
 			break;
 	}

 	if (check_mouse_mode) {
 		GEM_CheckMouseMode(this);
 	}

 	return quit;
 }

 static void do_keyboard(short kc, short ks)
 {
 	int scancode;

 	if (kc) {
 		scancode=(kc>>8) & (ATARIBIOS_MAXKEYS-1);
 		gem_currentkeyboard[scancode]=0xFF;
 	}

 	/* Read special keys */
 	if (ks & K_RSHIFT)
 		gem_currentkeyboard[SCANCODE_RIGHTSHIFT]=0xFF;
 	if (ks & K_LSHIFT)
 		gem_currentkeyboard[SCANCODE_LEFTSHIFT]=0xFF;
 	if (ks & K_CTRL)
 		gem_currentkeyboard[SCANCODE_LEFTCONTROL]=0xFF;
 	if (ks & K_ALT)
 		gem_currentkeyboard[SCANCODE_LEFTALT]=0xFF;
 }

 static void do_mouse(_THIS, short mx, short my, short mb, short ks)
 {
 	static short prevmousex=0, prevmousey=0, prevmouseb=0;
 	short x2, y2, w2, h2;

 	/* Don't return mouse events if out of window */
 	if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS)==0) {
 		return;
 	}

 	/* Retrieve window coords, and generate mouse events accordingly */
 	x2 = y2 = 0;
 	w2 = VDI_w;
 	h2 = VDI_h;
 	if ((!GEM_fullscreen) && (GEM_handle>=0)) {
 		wind_get (GEM_handle, WF_WORKXYWH, &x2, &y2, &w2, &h2);

 		/* Do not generate mouse button event if out of window working area */
 		if ((mx<x2) || (mx>=x2+w2) || (my<y2) || (my>=y2+h2)) {
 			mb=prevmouseb;
 		}
 	}

 	/* Mouse motion ? */
 	if (GEM_mouse_relative) {
 		if (GEM_usedevmouse) {
 			SDL_AtariDevMouse_PostMouseEvents(this, SDL_FALSE);
 		} else {
 			SDL_AtariXbios_PostMouseEvents(this, SDL_FALSE);
 		}
 	} else {
 		if ((prevmousex!=mx) || (prevmousey!=my)) {
 			int posx, posy;

 			/* Give mouse position relative to window position */
 			posx = mx - x2;
 			if (posx<0) posx = 0;
 			if (posx>w2) posx = w2-1;
 			posy = my - y2;
 			if (posy<0) posy = 0;
 			if (posy>h2) posy = h2-1;

 			SDL_PrivateMouseMotion(0, 0, posx, posy);
 		}
 		prevmousex = mx;
 		prevmousey = my;
 	}

 	/* Mouse button ? */
 	if (prevmouseb!=mb) {
 		int i;

 		for (i=0;i<2;i++) {
 			int curbutton, prevbutton;

 			curbutton = mb & (1<<i);
 			prevbutton = prevmouseb & (1<<i);

 			if (curbutton && !prevbutton) {
 				SDL_PrivateMouseButton(SDL_PRESSED, i+1, 0, 0);
 			}
 			if (!curbutton && prevbutton) {
 				SDL_PrivateMouseButton(SDL_RELEASED, i+1, 0, 0);
 			}
 		}
 		prevmouseb = mb;
 	}

 	/* Read special keys */
 	if (ks & K_RSHIFT)
 		gem_currentkeyboard[SCANCODE_RIGHTSHIFT]=0xFF;
 	if (ks & K_LSHIFT)
 		gem_currentkeyboard[SCANCODE_LEFTSHIFT]=0xFF;
 	if (ks & K_CTRL)
 		gem_currentkeyboard[SCANCODE_LEFTCONTROL]=0xFF;
 	if (ks & K_ALT)
 		gem_currentkeyboard[SCANCODE_LEFTALT]=0xFF;
 }
	/*
	SDL - Simple DirectMedia Layer
	Copyright (C) 1997-2009 Sam Lantinga

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Lesser General Public
	License as published by the Free Software Foundation; either
	version 2.1 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
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public
	License along with this library; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

	Sam Lantinga
	slouken@libsdl.org
	*/
	#include "SDL_config.h"

	/*
	* GEM SDL video driver implementation
	* inspired from the Dummy SDL driver
	*
	* Patrice Mandin
	* and work from
	* Olivier Landemarre, Johan Klockars, Xavier Joubert, Claude Attard
	*/

	#include <gem.h>

	#include "../../events/SDL_sysevents.h"
	#include "../../events/SDL_events_c.h"
	#include "SDL_gemvideo.h"
	#include "SDL_gemevents_c.h"
	#include "../ataricommon/SDL_atarikeys.h" /* for keyboard scancodes */
	#include "../ataricommon/SDL_atarievents_c.h"
	#include "../ataricommon/SDL_xbiosevents_c.h"
	#include "../ataricommon/SDL_ataridevmouse_c.h"

	/* Variables */

	static unsigned char gem_currentkeyboard[ATARIBIOS_MAXKEYS];
	static unsigned char gem_previouskeyboard[ATARIBIOS_MAXKEYS];

	/* Functions prototypes */

	static int do_messages(_THIS, short *message);
	static void do_keyboard(short kc, short ks);
	static void do_mouse(_THIS, short mx, short my, short mb, short ks);

	/* Functions */

	void GEM_InitOSKeymap(_THIS)
	{
	SDL_memset(gem_currentkeyboard, 0, sizeof(gem_currentkeyboard));
	SDL_memset(gem_previouskeyboard, 0, sizeof(gem_previouskeyboard));

	/* Mouse init */
	GEM_mouse_relative = SDL_FALSE;

	SDL_Atari_InitInternalKeymap(this);
	}

	void GEM_PumpEvents(_THIS)
	{
	short mousex, mousey, mouseb, dummy;
	short kstate, prevkc, prevks;
	int i;
	SDL_keysym keysym;

	SDL_memset(gem_currentkeyboard,0,sizeof(gem_currentkeyboard));
	prevkc = prevks = 0;

	for (;;)
	{
	int quit, resultat, event_mask, mouse_event;
	short buffer[8], kc;
	short x2,y2,w2,h2;

	quit =
	mouse_event =
	x2=y2=w2=h2 = 0;

	event_mask = MU_MESAG\|MU_TIMER\|MU_KEYBD;
	if (!GEM_fullscreen && (GEM_handle>=0)) {
	wind_get (GEM_handle, WF_WORKXYWH, &x2, &y2, &w2, &h2);
	event_mask \|= MU_M1;
	mouse_event = ( (SDL_GetAppState() & SDL_APPMOUSEFOCUS)
	== SDL_APPMOUSEFOCUS) ? MO_LEAVE : MO_ENTER;
	}

	resultat = evnt_multi(
	event_mask,
	0,0,0,
	mouse_event,x2,y2,w2,h2,
	0,0,0,0,0,
	buffer,
	10,
	&dummy,&dummy,&dummy,&kstate,&kc,&dummy
	);

	/* Message event ? */
	if (resultat & MU_MESAG)
	quit = do_messages(this, buffer);

	/* Keyboard event ? */
	if (resultat & MU_KEYBD) {
	if ((prevkc != kc) \|\| (prevks != kstate)) {
	do_keyboard(kc,kstate);
	} else {
	/* Avoid looping, if repeating same key */
	break;
	}
	}

	/* Mouse entering/leaving window */
	if (resultat & MU_M1) {
	if (this->input_grab == SDL_GRAB_OFF) {
	/* Switch mouse focus state */
	SDL_PrivateAppActive((mouse_event == MO_ENTER),
	SDL_APPMOUSEFOCUS);
	}
	GEM_CheckMouseMode(this);
	}

	/* Timer event ? */
	if ((resultat & MU_TIMER) \|\| quit)
	break;
	}

	/* Update mouse */
	graf_mkstate(&mousex, &mousey, &mouseb, &kstate);
	do_mouse(this, mousex, mousey, mouseb, kstate);

	/* Now generate keyboard events */
	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
	/* Key pressed ? */
	if (gem_currentkeyboard[i] && !gem_previouskeyboard[i])
	SDL_PrivateKeyboard(SDL_PRESSED,
	SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));

	/* Key unpressed ? */
	if (gem_previouskeyboard[i] && !gem_currentkeyboard[i])
	SDL_PrivateKeyboard(SDL_RELEASED,
	SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));
	}

	SDL_memcpy(gem_previouskeyboard,gem_currentkeyboard,sizeof(gem_previouskeyboard));

	/* Refresh window name ? */
	if (GEM_refresh_name) {
	const char *window_name =
	(SDL_GetAppState() & SDL_APPACTIVE)
	? GEM_title_name : GEM_icon_name;
	if (window_name) {
	wind_set(GEM_handle,WF_NAME,
	(short)(((unsigned long)window_name)>>16),
	(short)(((unsigned long)window_name) & 0xffff),
	0,0);
	}
	GEM_refresh_name = SDL_FALSE;
	}
	}

	static int do_messages(_THIS, short *message)
	{
	int quit, posted, check_mouse_mode;
	short x2,y2,w2,h2;

	quit = check_mouse_mode = 0;
	switch (message[0]) {
	case WM_CLOSED:
	case AP_TERM:
	posted = SDL_PrivateQuit();
	quit=1;
	break;
	case WM_MOVED:
	wind_set(message[3],WF_CURRXYWH,message[4],message[5],message[6],message[7]);
	break;
	case WM_TOPPED:
	wind_set(message[3],WF_TOP,message[4],0,0,0);
	/* Continue with TOP event processing */
	case WM_ONTOP:
	SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
	if (VDI_setpalette) {
	VDI_setpalette(this, VDI_curpalette);
	}
	check_mouse_mode = 1;
	break;
	case WM_REDRAW:
	if (!GEM_lock_redraw) {
	GEM_wind_redraw(this, message[3],&message[4]);
	}
	break;
	case WM_ICONIFY:
	case WM_ALLICONIFY:
	wind_set(message[3],WF_ICONIFY,message[4],message[5],message[6],message[7]);
	/* If we're active, make ourselves inactive */
	if ( SDL_GetAppState() & SDL_APPACTIVE ) {
	/* Send an internal deactivate event */
	SDL_PrivateAppActive(0, SDL_APPACTIVE);
	}
	/* Update window title */
	if (GEM_refresh_name && GEM_icon_name) {
	wind_set(GEM_handle,WF_NAME,(short)(((unsigned long)GEM_icon_name)>>16),(short)(((unsigned long)GEM_icon_name) & 0xffff),0,0);
	GEM_refresh_name = SDL_FALSE;
	}
	check_mouse_mode = 1;
	break;
	case WM_UNICONIFY:
	wind_set(message[3],WF_UNICONIFY,message[4],message[5],message[6],message[7]);
	/* If we're not active, make ourselves active */
	if ( !(SDL_GetAppState() & SDL_APPACTIVE) ) {
	/* Send an internal activate event */
	SDL_PrivateAppActive(1, SDL_APPACTIVE);
	}
	if (GEM_refresh_name && GEM_title_name) {
	wind_set(GEM_handle,WF_NAME,(short)(((unsigned long)GEM_title_name)>>16),(short)(((unsigned long)GEM_title_name) & 0xffff),0,0);
	GEM_refresh_name = SDL_FALSE;
	}
	check_mouse_mode = 1;
	break;
	case WM_SIZED:
	wind_set (message[3], WF_CURRXYWH, message[4], message[5], message[6], message[7]);
	wind_get (message[3], WF_WORKXYWH, &x2, &y2, &w2, &h2);
	GEM_win_fulled = SDL_FALSE; /* Cancel maximized flag */
	GEM_lock_redraw = SDL_TRUE; /* Prevent redraw till buffers resized */
	SDL_PrivateResize(w2, h2);
	break;
	case WM_FULLED:
	{
	short x,y,w,h;

	if (GEM_win_fulled) {
	wind_get (message[3], WF_PREVXYWH, &x, &y, &w, &h);
	GEM_win_fulled = SDL_FALSE;
	} else {
	x = GEM_desk_x;
	y = GEM_desk_y;
	w = GEM_desk_w;
	h = GEM_desk_h;
	GEM_win_fulled = SDL_TRUE;
	}
	wind_set (message[3], WF_CURRXYWH, x, y, w, h);
	wind_get (message[3], WF_WORKXYWH, &x2, &y2, &w2, &h2);
	GEM_lock_redraw = SDL_TRUE; /* Prevent redraw till buffers resized */
	SDL_PrivateResize(w2, h2);
	}
	break;
	case WM_BOTTOMED:
	wind_set(message[3],WF_BOTTOM,0,0,0,0);
	/* Continue with BOTTOM event processing */
	case WM_UNTOPPED:
	SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);
	if (VDI_setpalette) {
	VDI_setpalette(this, VDI_oldpalette);
	}
	check_mouse_mode = 1;
	break;
	}

	if (check_mouse_mode) {
	GEM_CheckMouseMode(this);
	}

	return quit;
	}

	static void do_keyboard(short kc, short ks)
	{
	int scancode;

	if (kc) {
	scancode=(kc>>8) & (ATARIBIOS_MAXKEYS-1);
	gem_currentkeyboard[scancode]=0xFF;
	}

	/* Read special keys */
	if (ks & K_RSHIFT)
	gem_currentkeyboard[SCANCODE_RIGHTSHIFT]=0xFF;
	if (ks & K_LSHIFT)
	gem_currentkeyboard[SCANCODE_LEFTSHIFT]=0xFF;
	if (ks & K_CTRL)
	gem_currentkeyboard[SCANCODE_LEFTCONTROL]=0xFF;
	if (ks & K_ALT)
	gem_currentkeyboard[SCANCODE_LEFTALT]=0xFF;
	}

	static void do_mouse(_THIS, short mx, short my, short mb, short ks)
	{
	static short prevmousex=0, prevmousey=0, prevmouseb=0;
	short x2, y2, w2, h2;

	/* Don't return mouse events if out of window */
	if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS)==0) {
	return;
	}

	/* Retrieve window coords, and generate mouse events accordingly */
	x2 = y2 = 0;
	w2 = VDI_w;
	h2 = VDI_h;
	if ((!GEM_fullscreen) && (GEM_handle>=0)) {
	wind_get (GEM_handle, WF_WORKXYWH, &x2, &y2, &w2, &h2);

	/* Do not generate mouse button event if out of window working area */
	if ((mx<x2) \|\| (mx>=x2+w2) \|\| (my<y2) \|\| (my>=y2+h2)) {
	mb=prevmouseb;
	}
	}

	/* Mouse motion ? */
	if (GEM_mouse_relative) {
	if (GEM_usedevmouse) {
	SDL_AtariDevMouse_PostMouseEvents(this, SDL_FALSE);
	} else {
	SDL_AtariXbios_PostMouseEvents(this, SDL_FALSE);
	}
	} else {
	if ((prevmousex!=mx) \|\| (prevmousey!=my)) {
	int posx, posy;

	/* Give mouse position relative to window position */
	posx = mx - x2;
	if (posx<0) posx = 0;
	if (posx>w2) posx = w2-1;
	posy = my - y2;
	if (posy<0) posy = 0;
	if (posy>h2) posy = h2-1;

	SDL_PrivateMouseMotion(0, 0, posx, posy);
	}
	prevmousex = mx;
	prevmousey = my;
	}

	/* Mouse button ? */
	if (prevmouseb!=mb) {
	int i;

	for (i=0;i<2;i++) {
	int curbutton, prevbutton;

	curbutton = mb & (1<<i);
	prevbutton = prevmouseb & (1<<i);

	if (curbutton && !prevbutton) {
	SDL_PrivateMouseButton(SDL_PRESSED, i+1, 0, 0);
	}
	if (!curbutton && prevbutton) {
	SDL_PrivateMouseButton(SDL_RELEASED, i+1, 0, 0);
	}
	}
	prevmouseb = mb;
	}

	/* Read special keys */
	if (ks & K_RSHIFT)
	gem_currentkeyboard[SCANCODE_RIGHTSHIFT]=0xFF;
	if (ks & K_LSHIFT)
	gem_currentkeyboard[SCANCODE_LEFTSHIFT]=0xFF;
	if (ks & K_CTRL)
	gem_currentkeyboard[SCANCODE_LEFTCONTROL]=0xFF;
	if (ks & K_ALT)
	gem_currentkeyboard[SCANCODE_LEFTALT]=0xFF;
	}