intf_x11.c

vlc stand 0.1.99 ist sehr einfach

/*****************************************************************************
 * intf_x11.c: X11 interface
 *****************************************************************************
 * Copyright (C) 1999, 2000 VideoLAN
 *
 * Authors:
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include "defs.h"

#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <string.h>                                            /* strerror() */
#include <sys/types.h>                        /* on BSD, uio.h needs types.h */
#include <sys/uio.h>                                          /* for input.h */

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>

#include "config.h"
#include "common.h"
#include "threads.h"
#include "mtime.h"
#include "plugins.h"

#include "input.h"
#include "video.h"
#include "video_output.h"

#include "intf_msg.h"
#include "interface.h"

#include "main.h"

/*****************************************************************************
 * intf_sys_t: description and status of X11 interface
 *****************************************************************************/
typedef struct intf_sys_s
{
    /* X11 generic properties */
    Display *           p_display;                    /* X11 display pointer */
    int                 i_screen;                              /* X11 screen */
    Atom                wm_protocols;
    Atom                wm_delete_window;

    /* Main window properties */
    Window              window;                               /* main window */
    GC                  gc;               /* graphic context for main window */
    int                 i_width;                     /* width of main window */
    int                 i_height;                   /* height of main window */
    Colormap            colormap;               /* colormap used (8bpp only) */

    /* Screen saver properties */
    int                 i_ss_count;              /* enabling/disabling count */
    int                 i_ss_timeout;                             /* timeout */
    int                 i_ss_interval;           /* interval between changes */
    int                 i_ss_blanking;                      /* blanking mode */
    int                 i_ss_exposure;                      /* exposure mode */

    /* Mouse pointer properties */
    boolean_t           b_mouse;         /* is the mouse pointer displayed ? */

} intf_sys_t;

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
static int  X11CreateWindow             ( intf_thread_t *p_intf );
static void X11DestroyWindow            ( intf_thread_t *p_intf );
static void X11ManageWindow             ( intf_thread_t *p_intf );
static void X11EnableScreenSaver        ( intf_thread_t *p_intf );
static void X11DisableScreenSaver       ( intf_thread_t *p_intf );
static void X11TogglePointer            ( intf_thread_t *p_intf );

/*****************************************************************************
 * intf_SysCreate: initialize and create window
 *****************************************************************************/
int intf_SysCreate( intf_thread_t *p_intf )
{
    char       *psz_display;

    /* Allocate instance and initialize some members */
    p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
    if( p_intf->p_sys == NULL )
    {
        intf_ErrMsg("error: %s\n", strerror(ENOMEM));
        return( 1 );
    }

    /* Open display, unsing 'vlc_display' or DISPLAY environment variable */
    psz_display = XDisplayName( main_GetPszVariable( VOUT_DISPLAY_VAR, NULL ) );
    p_intf->p_sys->p_display = XOpenDisplay( psz_display );
    if( !p_intf->p_sys->p_display )                                 /* error */
    {
        intf_ErrMsg("error: can't open display %s\n", psz_display );
        free( p_intf->p_sys );
        return( 1 );
    }
    p_intf->p_sys->i_screen = DefaultScreen( p_intf->p_sys->p_display );

    /* Spawn base window - this window will include the video output window,
     * but also command buttons, subtitles and other indicators */
    if( X11CreateWindow( p_intf ) )
    {
        intf_ErrMsg("error: can't create interface window\n" );
        XCloseDisplay( p_intf->p_sys->p_display );
        free( p_intf->p_sys );
        return( 1 );
    }

    /* Spawn video output thread */
    if( p_main->b_video )
    {
        p_intf->p_vout = vout_CreateThread( psz_display, p_intf->p_sys->window,
                                            p_intf->p_sys->i_width,
                                            p_intf->p_sys->i_height, NULL, 0,
                                            (void *)&p_intf->p_sys->colormap );

        if( p_intf->p_vout == NULL )                                /* error */
        {
            intf_ErrMsg("error: can't create video output thread\n" );
            X11DestroyWindow( p_intf );
            XCloseDisplay( p_intf->p_sys->p_display );
            free( p_intf->p_sys );
            return( 1 );
        }
    }

    p_intf->p_sys->b_mouse = 1;

    /* Disable screen saver and return */
    p_intf->p_sys->i_ss_count = 1;
    X11DisableScreenSaver( p_intf );
    return( 0 );
}

/*****************************************************************************
 * intf_SysDestroy: destroy interface window
 *****************************************************************************/
void intf_SysDestroy( intf_thread_t *p_intf )
{
    /* Enable screen saver */
    X11EnableScreenSaver( p_intf );

    /* Close input thread, if any (blocking) */
    if( p_intf->p_input )
    {
        input_DestroyThread( p_intf->p_input, NULL );
    }

    /* Close video output thread, if any (blocking) */
    if( p_intf->p_vout )
    {
        vout_DestroyThread( p_intf->p_vout, NULL );
    }

    /* Close main window and display */
    X11DestroyWindow( p_intf );
    XCloseDisplay( p_intf->p_sys->p_display );

    /* Destroy structure */
    free( p_intf->p_sys );
}


/*****************************************************************************
 * intf_SysManage: event loop
 *****************************************************************************/
void intf_SysManage( intf_thread_t *p_intf )
{
    /* Manage main window */
    X11ManageWindow( p_intf );
}

/* following functions are local */

/*****************************************************************************
 * X11CreateWindow: open and set-up X11 main window
 *****************************************************************************/
static int X11CreateWindow( intf_thread_t *p_intf )
{
    XSizeHints              xsize_hints;
    XSetWindowAttributes    xwindow_attributes;
    XGCValues               xgcvalues;
    XEvent                  xevent;
    boolean_t               b_expose;
    boolean_t               b_configure_notify;
    boolean_t               b_map_notify;

    /* Set main window's size */
    p_intf->p_sys->i_width =  main_GetIntVariable( VOUT_WIDTH_VAR, VOUT_WIDTH_DEFAULT );
    p_intf->p_sys->i_height = main_GetIntVariable( VOUT_HEIGHT_VAR, VOUT_HEIGHT_DEFAULT );

    /* Prepare window manager hints and properties */
    xsize_hints.base_width =            p_intf->p_sys->i_width;
    xsize_hints.base_height =           p_intf->p_sys->i_height;
    xsize_hints.flags =                 PSize;
    p_intf->p_sys->wm_protocols =       XInternAtom( p_intf->p_sys->p_display,
                                                     "WM_PROTOCOLS", True );
    p_intf->p_sys->wm_delete_window =   XInternAtom( p_intf->p_sys->p_display,
                                                     "WM_DELETE_WINDOW", True );

    /* Prepare window attributes */
    xwindow_attributes.backing_store = Always;       /* save the hidden part */
    xwindow_attributes.background_pixel = WhitePixel( p_intf->p_sys->p_display,
                                                      p_intf->p_sys->i_screen );

    xwindow_attributes.event_mask = ExposureMask | StructureNotifyMask;

    /* Create the window and set hints - the window must receive ConfigureNotify
     * events, and, until it is displayed, Expose and MapNotify events. */
    p_intf->p_sys->window = XCreateWindow( p_intf->p_sys->p_display,
                                           DefaultRootWindow( p_intf->p_sys->p_display ),
                                           0, 0,
                                           p_intf->p_sys->i_width, p_intf->p_sys->i_height, 1,
                                           0, InputOutput, 0,
                                           CWBackingStore | CWBackPixel | CWEventMask,
                                           &xwindow_attributes );

    /* Set window manager hints and properties: size hints, command, window's name,
     * and accepted protocols */
    XSetWMNormalHints( p_intf->p_sys->p_display, p_intf->p_sys->window, &xsize_hints );
    XSetCommand( p_intf->p_sys->p_display, p_intf->p_sys->window,
                 p_main->ppsz_argv, p_main->i_argc );
    XStoreName( p_intf->p_sys->p_display, p_intf->p_sys->window, VOUT_TITLE );
    if( (p_intf->p_sys->wm_protocols == None)        /* use WM_DELETE_WINDOW */
        || (p_intf->p_sys->wm_delete_window == None)
        || !XSetWMProtocols( p_intf->p_sys->p_display, p_intf->p_sys->window,
                             &p_intf->p_sys->wm_delete_window, 1 ) )
    {
        /* WM_DELETE_WINDOW is not supported by window manager */
        intf_Msg("error: missing or bad window manager - please exit program kindly.\n");
    }

    /* Creation of a graphic context that doesn't generate a GraphicsExpose event
       when using functions like XCopyArea */
    xgcvalues.graphics_exposures = False;
    p_intf->p_sys->gc =  XCreateGC( p_intf->p_sys->p_display, p_intf->p_sys->window,
                                    GCGraphicsExposures, &xgcvalues);

    /* Send orders to server, and wait until window is displayed - three events
     * must be received: a MapNotify event, an Expose event allowing drawing in the
     * window, and a ConfigureNotify to get the window dimensions. Once those events
     * have been received, only ConfigureNotify events need to be received. */
    b_expose = 0;
    b_configure_notify = 0;
    b_map_notify = 0;
    XMapWindow( p_intf->p_sys->p_display, p_intf->p_sys->window);
    do
    {
        XNextEvent( p_intf->p_sys->p_display, &xevent);
        if( (xevent.type == Expose)
            && (xevent.xexpose.window == p_intf->p_sys->window) )