ggi.c

uclinux 下的vlc播放器源代码

 * a non null value if an error occurred.
 *****************************************************************************/
static int Manage( vout_thread_t *p_vout )
{
    struct timeval tv = { 0, 1000 };                        /* 1 millisecond */
    gii_event_mask mask;
    gii_event      event;
    vlc_value_t    val;

    mask = emKeyboard | emPtrButtonPress | emPtrButtonRelease;

    ggiEventPoll( p_vout->p_sys->p_display, mask, &tv );

    while( ggiEventsQueued( p_vout->p_sys->p_display, mask) )
    {
        ggiEventRead( p_vout->p_sys->p_display, &event, mask);

        switch( event.any.type )
        {
            case evKeyRelease:

                switch( event.key.sym )
                {
                    case 'q':
                    case 'Q':
                    case GIIUC_Escape:
                        p_vout->p_vlc->b_die = 1;
                        break;

                    default:
                        break;
                }
                break;

            case evPtrButtonRelease:

                switch( event.pbutton.button )
                {
                    case GII_PBUTTON_LEFT:
                        val.b_bool = VLC_TRUE;
                        var_Set( p_vout, "mouse-clicked", val );
                        break;

                    case GII_PBUTTON_RIGHT:
                        {
                            intf_thread_t *p_intf;
                            p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
                                                              FIND_ANYWHERE );
                            if( p_intf )
                            {
                                p_intf->b_menu_change = 1;
                                vlc_object_release( p_intf );
                            }
                        }
                        break;
                }
                break;

            default:
                break;
        }
    }

    return( 0 );
}

/*****************************************************************************
 * Display: displays previously rendered output
 *****************************************************************************/
static void Display( vout_thread_t *p_vout, picture_t *p_pic )
{
#define p_b p_vout->p_sys->pp_buffer
    p_pic->p->p_pixels = p_b[ p_vout->p_sys->i_index ]->write;

    /* Change display frame */
    if( p_vout->p_sys->b_must_acquire )
    {
        ggiResourceRelease( p_b[ p_vout->p_sys->i_index ]->resource );
    }
    ggiSetDisplayFrame( p_vout->p_sys->p_display,
                        p_b[ p_vout->p_sys->i_index ]->frame );

    /* Swap buffers and change write frame */
    p_vout->p_sys->i_index ^= 1;
    p_pic->p->p_pixels = p_b[ p_vout->p_sys->i_index ]->write;

    if( p_vout->p_sys->b_must_acquire )
    {
        ggiResourceAcquire( p_b[ p_vout->p_sys->i_index ]->resource,
                            GGI_ACTYPE_WRITE );
    }
    ggiSetWriteFrame( p_vout->p_sys->p_display,
                      p_b[ p_vout->p_sys->i_index ]->frame );

    /* Flush the output so that it actually displays */
    ggiFlush( p_vout->p_sys->p_display );
#undef p_b
}

/* following functions are local */

/*****************************************************************************
 * OpenDisplay: open and initialize GGI device
 *****************************************************************************
 * Open and initialize display according to preferences specified in the vout
 * thread fields.
 *****************************************************************************/
static int OpenDisplay( vout_thread_t *p_vout )
{
#define p_b p_vout->p_sys->pp_buffer
    ggi_color   col_fg;                                  /* foreground color */
    ggi_color   col_bg;                                  /* background color */
    int         i_index;                               /* all purposes index */
    char        *psz_display;

    /* Initialize library */
    if( ggiInit() )
    {
        msg_Err( p_vout, "cannot initialize GGI library" );
        return( 1 );
    }

    /* Open display */
    psz_display = config_GetPsz( p_vout, "ggi_display" );

    p_vout->p_sys->p_display = ggiOpen( psz_display, NULL );
    if( psz_display ) free( psz_display );

    if( p_vout->p_sys->p_display == NULL )
    {
        msg_Err( p_vout, "cannot open GGI default display" );
        ggiExit();
        return( 1 );
    }

    /* Find most appropriate mode */
    p_vout->p_sys->mode.frames =    2;                          /* 2 buffers */
    p_vout->p_sys->mode.visible.x = config_GetInt( p_vout, "width" );
    p_vout->p_sys->mode.visible.y = config_GetInt( p_vout, "height" );
    p_vout->p_sys->mode.virt.x =    GGI_AUTO;
    p_vout->p_sys->mode.virt.y =    GGI_AUTO;
    p_vout->p_sys->mode.size.x =    GGI_AUTO;
    p_vout->p_sys->mode.size.y =    GGI_AUTO;
    p_vout->p_sys->mode.graphtype = GT_15BIT;        /* minimum usable depth */
    p_vout->p_sys->mode.dpp.x =     GGI_AUTO;
    p_vout->p_sys->mode.dpp.y =     GGI_AUTO;
    ggiCheckMode( p_vout->p_sys->p_display, &p_vout->p_sys->mode );

    /* FIXME: Check that returned mode has some minimum properties */

    /* Set mode */
    if( ggiSetMode( p_vout->p_sys->p_display, &p_vout->p_sys->mode ) )
    {
        msg_Err( p_vout, "cannot set GGI mode" );
        ggiClose( p_vout->p_sys->p_display );
        ggiExit();
        return( 1 );
    }

    /* Check buffers properties */
    p_vout->p_sys->b_must_acquire = 0;
    for( i_index = 0; i_index < 2; i_index++ )
    {
        /* Get buffer address */
        p_vout->p_sys->pp_buffer[ i_index ] =
            (ggi_directbuffer *)ggiDBGetBuffer( p_vout->p_sys->p_display,
                                                i_index );
        if( p_b[ i_index ] == NULL )
        {
            msg_Err( p_vout, "double buffering is not possible" );
            ggiClose( p_vout->p_sys->p_display );
            ggiExit();
            return( 1 );
        }

        /* Check buffer properties */
        if( ! ( p_b[ i_index ]->type & GGI_DB_SIMPLE_PLB )
           || ( p_b[ i_index ]->page_size != 0 )
           || ( p_b[ i_index ]->write == NULL )
           || ( p_b[ i_index ]->noaccess != 0 )
           || ( p_b[ i_index ]->align != 0 ) )
        {
            msg_Err( p_vout, "incorrect video memory type" );
            ggiClose( p_vout->p_sys->p_display );
            ggiExit();
            return( 1 );
        }

        /* Check if buffer needs to be acquired before write */
        if( ggiResourceMustAcquire( p_b[ i_index ]->resource ) )
        {
            p_vout->p_sys->b_must_acquire = 1;
        }
    }

    /* Set graphic context colors */
    col_fg.r = col_fg.g = col_fg.b = -1;
    col_bg.r = col_bg.g = col_bg.b = 0;
    if( ggiSetGCForeground(p_vout->p_sys->p_display,
                           ggiMapColor(p_vout->p_sys->p_display,&col_fg)) ||
        ggiSetGCBackground(p_vout->p_sys->p_display,
                           ggiMapColor(p_vout->p_sys->p_display,&col_bg)) )
    {
        msg_Err( p_vout, "cannot set colors" );
        ggiClose( p_vout->p_sys->p_display );
        ggiExit();
        return( 1 );
    }

    /* Set clipping for text */
    if( ggiSetGCClipping( p_vout->p_sys->p_display, 0, 0,
                          p_vout->p_sys->mode.visible.x,
                          p_vout->p_sys->mode.visible.y ) )
    {
        msg_Err( p_vout, "cannot set clipping" );
        ggiClose( p_vout->p_sys->p_display );
        ggiExit();
        return( 1 );
    }

    /* FIXME: set palette in 8bpp */
    p_vout->p_sys->i_bits_per_pixel = p_b[ 0 ]->buffer.plb.pixelformat->depth;

    return( 0 );
#undef p_b
}

/*****************************************************************************
 * CloseDisplay: close and reset GGI device
 *****************************************************************************
 * This function returns all resources allocated by OpenDisplay and restore
 * the original state of the device.
 *****************************************************************************/
static void CloseDisplay( vout_thread_t *p_vout )
{
    /* Restore original mode and close display */
    ggiClose( p_vout->p_sys->p_display );

    /* Exit library */
    ggiExit();
}

/*****************************************************************************
 * SetPalette: sets an 8 bpp palette
 *****************************************************************************/
static void SetPalette( vout_thread_t *p_vout,
                        uint16_t *red, uint16_t *green, uint16_t *blue )
{
    ggi_color colors[256];
    int i;

    /* Fill colors with color information */
    for( i = 0; i < 256; i++ )
    {
        colors[ i ].r = red[ i ];
        colors[ i ].g = green[ i ];
        colors[ i ].b = blue[ i ];
        colors[ i ].a = 0;
    }

    /* Set palette */
    if( ggiSetPalette( p_vout->p_sys->p_display, 0, 256, colors ) < 0 )
    {
        msg_Err( p_vout, "failed to set palette" );
    }
}