view src/events/SDL_active.c @ 1643:51038e80ae59

More general fix for bug #189 The clipping is done at a higher level, and the low level functions are passed clipped rectangles. Drivers which don't support source clipping have not been changed, so the image will be squished instead of clipped, but at least they will no longer crash when the destination rect was out of bounds.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 17 Apr 2006 06:47:23 +0000
parents d910939febfa
children a1b03ba2fcd0
line wrap: on
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2006 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"

/* Application focus/iconification handling code for SDL */

#include "SDL_events.h"
#include "SDL_events_c.h"


/* These are static for our active event handling code */
static Uint8 SDL_appstate = 0;

/* Public functions */
int SDL_AppActiveInit(void)
{
	/* Start completely active */
	SDL_appstate = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);

	/* That's it! */
	return(0);
}
void SDL_AppActiveQuit(void)
{
}

Uint8 SDL_GetAppState(void)
{
	return(SDL_appstate);
}

/* This is global for SDL_eventloop.c */
int SDL_PrivateAppActive(Uint8 gain, Uint8 state)
{
	int posted;
	Uint8 new_state;

	/* Modify the current state with the given mask */
	if ( gain ) {
		new_state = (SDL_appstate | state);
	} else {
		new_state = (SDL_appstate & ~state);
	}

	/* Drop events that don't change state */
	if ( new_state == SDL_appstate ) {
		return(0);
	}

	/* Update internal active state */
	SDL_appstate = new_state;

	/* Post the event, if desired */
	posted = 0;
	if ( SDL_ProcessEvents[SDL_ACTIVEEVENT] == SDL_ENABLE ) {
		SDL_Event event;
		SDL_memset(&event, 0, sizeof(event));
		event.type = SDL_ACTIVEEVENT;
		event.active.gain = gain;
		event.active.state = state;
		if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) {
			posted = 1;
			SDL_PushEvent(&event);
		}
	}

	/* If we lost keyboard focus, post key-up events */
	if ( (state & SDL_APPINPUTFOCUS) && !gain ) {
		SDL_ResetKeyboard();
	}
	return(posted);
}