x11.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * x11.c: Screen capture module.
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: x11.c 8290 2004-07-26 20:29:24Z gbazin $
- *
- * Authors: Gildas Bazin <gbazin@videolan.org>
- *
- * 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 <stdlib.h>
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
- #include "screen.h"
- int screen_InitCapture( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- Display *p_display;
- XWindowAttributes win_info;
- int i_chroma;
- /* Open the display */
- p_display = XOpenDisplay( NULL );
- if( !p_display )
- {
- msg_Err( p_demux, "cannot open display" );
- return VLC_EGENERIC;
- }
- p_sys->p_data = (void *)p_display;
- /* Get the parameters of the root window */
- if( !XGetWindowAttributes( p_display,
- DefaultRootWindow( p_display ),
- &win_info ) )
- {
- msg_Err( p_demux, "can't get root window attributes" );
- XCloseDisplay( p_display );
- return VLC_EGENERIC;
- }
- switch( win_info.depth )
- {
- case 8: /* FIXME: set the palette */
- i_chroma = VLC_FOURCC('R','G','B','2'); break;
- case 15:
- i_chroma = VLC_FOURCC('R','V','1','5'); break;
- case 16:
- i_chroma = VLC_FOURCC('R','V','1','6'); break;
- case 24:
- i_chroma = VLC_FOURCC('R','V','2','4'); break;
- case 32:
- i_chroma = VLC_FOURCC('R','V','3','2'); break;
- default:
- msg_Err( p_demux, "unknown screen depth %i", win_info.depth );
- XCloseDisplay( p_display );
- return VLC_EGENERIC;
- }
- es_format_Init( &p_sys->fmt, VIDEO_ES, i_chroma );
- p_sys->fmt.video.i_width = win_info.width;
- p_sys->fmt.video.i_height = win_info.height;
- p_sys->fmt.video.i_bits_per_pixel = win_info.depth;
- #if 0
- win_info.visual->red_mask;
- win_info.visual->green_mask;
- win_info.visual->blue_mask;
- win_info.visual->bits_per_rgb;
- #endif
- return VLC_SUCCESS;
- }
- int screen_CloseCapture( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- Display *p_display = (Display *)p_sys->p_data;
- XCloseDisplay( p_display );
- return VLC_SUCCESS;
- }
- block_t *screen_Capture( demux_t *p_demux )
- {
- demux_sys_t *p_sys = p_demux->p_sys;
- Display *p_display = (Display *)p_sys->p_data;
- block_t *p_block;
- XImage *image;
- int i_size;
- image = XGetImage( p_display, DefaultRootWindow( p_display ),
- 0, 0, p_sys->fmt.video.i_width,
- p_sys->fmt.video.i_height, AllPlanes, ZPixmap );
- if( !image )
- {
- msg_Warn( p_demux, "cannot get image" );
- return 0;
- }
- i_size = image->bytes_per_line * image->height;
- if( !( p_block = block_New( p_demux, i_size ) ) )
- {
- msg_Warn( p_demux, "cannot get block" );
- XDestroyImage( image );
- return 0;
- }
- memcpy( p_block->p_buffer, image->data, i_size );
- XDestroyImage( image );
- return p_block;
- }