sdl_ph_events.c

MPEG-4编解码的实现(包括MPEG4视音频编解码)

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  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
    [e-mail]
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id: SDL_ph_events.c,v 1.4 2002/04/22 21:38:05 wmay Exp $";
#endif

/* Handle the event stream, converting photon events into SDL events */

#define DISABLE_X11

#include <Ph.h>
#include <stdio.h>
#include <setjmp.h>
#include <photon/PkKeyDef.h>
#include <sys/time.h>

#include "SDL.h"
#include "SDL_syswm.h"
#include "SDL_sysevents.h"
#include "SDL_sysvideo.h"
#include "SDL_events_c.h"
#include "SDL_ph_video.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_events_c.h"


/* The translation tables from a photon keysym to a SDL keysym */
static SDLKey ODD_keymap[256];
static SDLKey MISC_keymap[0xFF + 1];
SDL_keysym *ph_TranslateKey(PhKeyEvent_t *key, SDL_keysym *keysym);

/* Check to see if this is a repeated key.
   (idea shamelessly lifted from GII -- thanks guys! :)
 */

#if 0
static int ph_KeyRepeat(_THIS, PhKeyEvent_t* keyevent)
{
//	PhEvent_t* peekevent;
	PhKeyEvent_t* keyEvent;
	int repeated;

	repeated = 0;
	switch (PhEventPeek( peekevent, EVENT_SIZE ))
	{
		case Ph_EVENT_MSG: {
			if(peekevent->type == Ph_EV_KEY)
			{
				keyEvent = PhGetData( peekevent );
				if ( !(Pk_KF_Key_Down & keyEvent->key_flags) &&
					(keyEvent->key_cap == keyevent->key_cap) &&
					(peekevent->timestamp == event->timestamp)	
				) {
					repeated = 1;
					 /* PhEventNext( peekevent, EVENT_SIZE ); */
				}				
			}
		}
		break;

		case -1: {
			perror( "PhEventPeek failed" );
		}
		break;

		default: /* no events pending */
	}
	return(repeated);
}
#endif

static int ph_WarpedMotion(_THIS, PhEvent_t *winEvent)
{
/*	PhPointerEvent_t *pointer = PhGetData( winEvent ); */
	PhRect_t *rect = PhGetRects( winEvent );

	int centre_x, centre_y;
	int dx, dy;
        short abs_x, abs_y;
	int posted;

	centre_x = SDL_VideoSurface->w / 2;
	centre_y = SDL_VideoSurface->h / 2;

	dx = rect->ul.x - centre_x;
	dy = rect->ul.y - centre_y;

	posted = SDL_PrivateMouseMotion( 0, 1, dx, dy );

	/* Move mouse cursor to middle of the window */
	PtGetAbsPosition( window, &abs_x, &abs_y );
	PhMoveCursorAbs( PhInputGroup(NULL),
			abs_x + centre_x,
			abs_y + centre_y );

	return(posted);
}

/* Control which motion flags the window has set, a flags value of -1 sets
 * MOTION_BUTTON and MOTION_NOBUTTON */

static void set_motion_sensitivity(_THIS, unsigned int flags)
{
	int rid, fields = Ph_EV_PTR_MOTION_BUTTON | Ph_EV_PTR_MOTION_NOBUTTON;
	PhRegion_t region;

	if( window )
	{
		rid = PtWidgetRid( window );
		if( rid != 0 && PhRegionQuery( rid, &region, NULL, NULL, 0 ) == 0 )
		{
			region.events_sense = ( region.events_sense & ~fields ) |
				( flags & fields );
			PhRegionChange( Ph_REGION_EV_SENSE, 0, &region,
					NULL, NULL );
		}
	}
}

/* Convert the photon button state value to an SDL value */
static Uint8 ph2sdl_mousebutton( unsigned short button_state )
{
	Uint8 mouse_button = 0;

	if( button_state & Ph_BUTTON_SELECT )
			mouse_button |= SDL_BUTTON_LEFT;
	if( button_state & Ph_BUTTON_MENU )
			mouse_button |= SDL_BUTTON_RIGHT;
	if( button_state & Ph_BUTTON_ADJUST )
			mouse_button |= SDL_BUTTON_MIDDLE;

	return( mouse_button );
}

static int ph_DispatchEvent(_THIS)
{
    int posted;
    PhRect_t* rect;
    PhPointerEvent_t* pointerEvent;
    PhKeyEvent_t* keyEvent;
    PhWindowEvent_t* winEvent;
    int i, buttons;
    SDL_Rect sdlrects[50]; 
	
    posted = 0;
	
    switch (event->type)
    {
        case Ph_EV_BOUNDARY:
        {
            if (event->subtype == Ph_EV_PTR_ENTER)
            {
                posted = SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
            }
            else if (event->subtype ==Ph_EV_PTR_LEAVE)
            {
                posted = SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);	
            }
        }
        break;

        case Ph_EV_PTR_MOTION_BUTTON:
        case Ph_EV_PTR_MOTION_NOBUTTON:
        {
            if (SDL_VideoSurface)
            {
                pointerEvent = PhGetData(event);
                rect = PhGetRects(event);

                if (mouse_relative)
                {
                    posted = ph_WarpedMotion(this, event);
                }
                else
                {
                    posted = SDL_PrivateMouseMotion(0, 0, rect->ul.x, rect->ul.y);
                }
            }
        }
        break;

        case Ph_EV_BUT_PRESS:
        {
            pointerEvent = PhGetData( event );
            buttons = ph2sdl_mousebutton( pointerEvent->buttons );
            if (buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_PRESSED, buttons, 0, 0);
            }
        }
        break;

        case Ph_EV_BUT_RELEASE:
        {
            pointerEvent = PhGetData(event);
            buttons = ph2sdl_mousebutton(pointerEvent->buttons);
            if (event->subtype == Ph_EV_RELEASE_REAL && buttons != 0)
            {
                posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
            }
            else if(event->subtype == Ph_EV_RELEASE_PHANTOM)
            {
                /* If the mouse is outside the window,
                 * only a phantom release event is sent, so
                 * check if the window doesn't have mouse focus.
                 * Not perfect, maybe checking the mouse button
                 * state for Ph_EV_BOUNDARY events would be
                 * better. */
                if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS) == 0)
		{
                    posted = SDL_PrivateMouseButton(SDL_RELEASED, buttons, 0, 0);
                }
            }
        }
        break;

        case Ph_EV_WM:
        {
            winEvent = PhGetData(event);

            /* losing focus */
            if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUSLOST))
            {
                set_motion_sensitivity(this, Ph_EV_PTR_MOTION_BUTTON);
                posted = SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);	

                /* Queue leaving fullscreen mode */
                switch_waiting = 0x01;
                switch_time = SDL_GetTicks() + 200;
            }
            /* gaining focus */
            else if ((winEvent->event_f==Ph_WM_FOCUS) && (winEvent->event_state==Ph_WM_EVSTATE_FOCUS))
            {
                set_motion_sensitivity(this, -1);
                posted = SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
            }
            /* request to quit */
            else if (winEvent->event_f==Ph_WM_CLOSE)
            {
                posted = SDL_PrivateQuit();
            }
            /* request to resize */
            else if (winEvent->event_f==Ph_WM_RESIZE)
            {
                SDL_PrivateResize(winEvent->size.w, winEvent->size.h);
            }
            /* request to maximize */
            else if (winEvent->event_f==Ph_WM_MAX)
            {
                /* TODO: get screen resolution, set window pos to 0, 0 and resize it ! */
            }
        }
        break;

        /* window has been resized, moved or removed */
        case Ph_EV_EXPOSE:
        {
            if (SDL_VideoSurface)
            {
                rect = PhGetRects(event);

                for(i=0;i<event->num_rects;i++)
                {
                    sdlrects[i].x = rect[i].ul.x;
                    sdlrects[i].y = rect[i].ul.y;
                    sdlrects[i].w = rect[i].lr.x - rect[i].ul.x + 1;
                    sdlrects[i].h = rect[i].lr.y - rect[i].ul.y + 1;
                }

                this->UpdateRects(this, event->num_rects, sdlrects);
            }
        }
	break;

        case Ph_EV_KEY: