glx.c
上传用户:riyaled888
上传日期:2009-03-27
资源大小:7338k
文件大小:12k
- /*****************************************************************************
- * glx.c: GLX OpenGL provider
- *****************************************************************************
- * Copyright (C) 2004 VideoLAN
- * $Id: glx.c 8498 2004-08-22 14:32:51Z hartman $
- *
- * Authors: Cyril Deguet <asmax@videolan.org>
- * 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 <errno.h> /* ENOMEM */
- #include <stdlib.h> /* malloc(), free() */
- #include <string.h>
- #include <vlc/vlc.h>
- #include <vlc/intf.h>
- #include <vlc/vout.h>
- #ifdef HAVE_SYS_SHM_H
- # include <sys/shm.h> /* shmget(), shmctl() */
- #endif
- #include <X11/Xlib.h>
- #include <X11/Xmd.h>
- #include <X11/Xutil.h>
- #include <X11/keysym.h>
- #ifdef HAVE_SYS_SHM_H
- # include <X11/extensions/XShm.h>
- #endif
- #ifdef DPMSINFO_IN_DPMS_H
- # include <X11/extensions/dpms.h>
- #endif
- #include <GL/glx.h>
- #include "xcommon.h"
- /* RV16 */
- //#define VLCGL_RGB_FORMAT GL_RGB
- //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
- /* RV24 */
- //#define VLCGL_RGB_FORMAT GL_RGB
- //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
- /* RV32 */
- #define VLCGL_RGB_FORMAT GL_RGBA
- #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
- /*****************************************************************************
- * OpenGL provider interface
- *****************************************************************************/
- static int CreateOpenGL ( vlc_object_t * );
- static void DestroyOpenGL( vlc_object_t * );
- static int InitOpenGL ( vout_thread_t * );
- static void SwapBuffers ( vout_thread_t * );
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int CheckGLX ( vlc_object_t *, vlc_bool_t * );
- static int InitGLX12 ( vout_thread_t * );
- static int InitGLX13 ( vout_thread_t * );
- static void SwitchContext( vout_thread_t * );
- /*****************************************************************************
- * Module descriptor
- *****************************************************************************/
- #define ADAPTOR_TEXT N_("XVideo adaptor number")
- #define ADAPTOR_LONGTEXT N_(
- "If you graphics card provides several adaptors, this option allows you "
- "to choose which one will be used (you shouldn't have to change this).")
- #define ALT_FS_TEXT N_("Alternate fullscreen method")
- #define ALT_FS_LONGTEXT N_(
- "There are two ways to make a fullscreen window, unfortunately each one "
- "has its drawbacks.n"
- "1) Let the window manager handle your fullscreen window (default), but "
- "things like taskbars will likely show on top of the video.n"
- "2) Completely bypass the window manager, but then nothing will be able "
- "to show on top of the video.")
- #define DISPLAY_TEXT N_("X11 display name")
- #define DISPLAY_LONGTEXT N_(
- "Specify the X11 hardware display you want to use. By default VLC will "
- "use the value of the DISPLAY environment variable.")
- #define SCREEN_TEXT N_("Screen to be used for fullscreen mode.")
- #define SCREEN_LONGTEXT N_(
- "Choose the screen you want to use in fullscreen mode. For instance "
- "set it to 0 for first screen, 1 for the second.")
- vlc_module_begin();
- set_description( _("X11 OpenGL provider") );
- set_capability( "opengl provider", 50 );
- set_callbacks( CreateOpenGL, DestroyOpenGL );
- add_string( "glx-display", NULL, NULL, DISPLAY_TEXT, DISPLAY_LONGTEXT, VLC_TRUE );
- add_integer( "glx-adaptor", -1, NULL, ADAPTOR_TEXT, ADAPTOR_LONGTEXT, VLC_TRUE );
- add_bool( "glx-altfullscreen", 0, NULL, ALT_FS_TEXT, ALT_FS_LONGTEXT, VLC_TRUE );
- #ifdef HAVE_XINERAMA
- add_integer ( "glx-xineramascreen", 0, NULL, SCREEN_TEXT, SCREEN_LONGTEXT, VLC_TRUE );
- #endif
- vlc_module_end();
- /*****************************************************************************
- * Exported prototypes
- *****************************************************************************/
- extern int E_(Activate) ( vlc_object_t * );
- extern void E_(Deactivate) ( vlc_object_t * );
- /*****************************************************************************
- * CreateOpenGL: initialize an OpenGL provider
- *****************************************************************************/
- static int CreateOpenGL( vlc_object_t *p_this )
- {
- vout_thread_t *p_vout = (vout_thread_t *)p_this;
- vlc_bool_t b_glx13;
- if( CheckGLX( p_this, &b_glx13 ) != VLC_SUCCESS )
- {
- msg_Err( p_vout, "no GLX support" );
- return VLC_EGENERIC;
- }
- if( E_(Activate)( p_this ) != VLC_SUCCESS )
- {
- return VLC_EGENERIC;
- }
- /* Set the function pointer */
- p_vout->pf_init = InitOpenGL;
- p_vout->pf_swap = SwapBuffers;
- p_vout->p_sys->b_glx13 = b_glx13;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * DestroyOpenGL: destroys an OpenGL provider
- *****************************************************************************/
- static void DestroyOpenGL( vlc_object_t *p_this )
- {
- vout_thread_t *p_vout = (vout_thread_t *)p_this;
- vout_sys_t *p_sys = p_vout->p_sys;
- glXDestroyContext( p_sys->p_display, p_sys->gwctx );
- if( p_sys->b_glx13 )
- {
- glXDestroyWindow( p_sys->p_display, p_sys->gwnd );
- }
- E_(Deactivate)( p_this );
- }
- /*****************************************************************************
- * OpenDisplay: open and initialize OpenGL device
- *****************************************************************************/
- static int CheckGLX( vlc_object_t *p_this, vlc_bool_t *b_glx13 )
- {
- Display *p_display = NULL;
- int i_opcode, i_evt, i_err = 0;
- int i_maj, i_min = 0;
- /* Open the display */
- p_display = XOpenDisplay( NULL );
- if( p_display == NULL )
- {
- msg_Err( p_this, "Cannot open display" );
- return VLC_EGENERIC;
- }
- /* Check for GLX extension */
- if( !XQueryExtension( p_display, "GLX", &i_opcode, &i_evt, &i_err ) )
- {
- msg_Err( p_this, "GLX extension not supported" );
- XCloseDisplay( p_display );
- return VLC_EGENERIC;
- }
- if( !glXQueryExtension( p_display, &i_err, &i_evt ) )
- {
- msg_Err( p_this, "glXQueryExtension failed" );
- XCloseDisplay( p_display );
- return VLC_EGENERIC;
- }
- /* Check GLX version */
- if (!glXQueryVersion( p_display, &i_maj, &i_min ) )
- {
- msg_Err( p_this, "glXQueryVersion failed" );
- XCloseDisplay( p_display );
- return VLC_EGENERIC;
- }
- if( i_maj <= 0 || ((i_maj == 1) && (i_min < 3)) )
- {
- *b_glx13 = VLC_FALSE;
- msg_Dbg( p_this, "Using GLX 1.2 API" );
- }
- else
- {
- *b_glx13 = VLC_TRUE;
- msg_Dbg( p_this, "Using GLX 1.3 API" );
- }
- XCloseDisplay( p_display );
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * InitOpenGL: initializes OpenGL provider
- *****************************************************************************/
- static int InitOpenGL( vout_thread_t *p_vout )
- {
- /* Initialize GLX */
- if( !p_vout->p_sys->b_glx13 )
- {
- if( InitGLX12( p_vout ) != VLC_SUCCESS )
- {
- return VLC_EGENERIC;
- }
- }
- else
- {
- if( InitGLX13( p_vout ) != VLC_SUCCESS )
- {
- return VLC_EGENERIC;
- }
- }
- /* Set the OpenGL context _for the current thread_ */
- SwitchContext( p_vout );
- return VLC_SUCCESS;
- }
- int InitGLX12( vout_thread_t *p_vout )
- {
- vout_sys_t *p_sys = p_vout->p_sys;
- XVisualInfo *p_vi;
- int p_attr[] = { GLX_RGBA, GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5,
- GLX_BLUE_SIZE, 5, GLX_DOUBLEBUFFER, 0 };
- p_vi = glXChooseVisual( p_sys->p_display,
- DefaultScreen( p_sys->p_display), p_attr );
- if(! p_vi )
- {
- msg_Err( p_vout, "Cannot get GLX 1.2 visual" );
- return VLC_EGENERIC;
- }
- /* Create an OpenGL context */
- p_sys->gwctx = glXCreateContext( p_sys->p_display, p_vi, 0, True );
- XFree( p_vi );
- if( !p_sys->gwctx )
- {
- msg_Err( p_vout, "Cannot create OpenGL context");
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- int InitGLX13( vout_thread_t *p_vout )
- {
- vout_sys_t *p_sys = p_vout->p_sys;
- int i_nbelem;
- GLXFBConfig *p_fbconfs, fbconf;
- XVisualInfo *p_vi;
- int p_attr[] = { GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5,
- GLX_BLUE_SIZE, 5, GLX_DOUBLEBUFFER, True,
- GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT, 0 };
- /* Get the FB configuration */
- p_fbconfs = glXChooseFBConfig( p_sys->p_display, 0, p_attr, &i_nbelem );
- if( (i_nbelem <= 0) || !p_fbconfs )
- {
- msg_Err( p_vout, "Cannot get FB configurations");
- if( p_fbconfs ) XFree( p_fbconfs );
- return VLC_EGENERIC;
- }
- fbconf = p_fbconfs[0];
- /* Get the X11 visual */
- p_vi = glXGetVisualFromFBConfig( p_sys->p_display, fbconf );
- if( !p_vi )
- {
- msg_Err( p_vout, "Cannot get X11 visual" );
- XFree( p_fbconfs );
- return VLC_EGENERIC;
- }
- XFree( p_vi );
- /* Create the GLX window */
- p_sys->gwnd = glXCreateWindow( p_sys->p_display, fbconf,
- p_sys->p_win->video_window, NULL );
- if( p_sys->gwnd == None )
- {
- msg_Err( p_vout, "Cannot create GLX window" );
- return VLC_EGENERIC;
- }
- /* Create an OpenGL context */
- p_sys->gwctx = glXCreateNewContext( p_sys->p_display, fbconf,
- GLX_RGBA_TYPE, NULL, True );
- XFree( p_fbconfs );
- if( !p_sys->gwctx )
- {
- msg_Err( p_vout, "Cannot create OpenGL context");
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * SwapBuffers: swap front/back buffers
- *****************************************************************************/
- static void SwapBuffers( vout_thread_t *p_vout )
- {
- vout_sys_t *p_sys = p_vout->p_sys;
- int i_width, i_height, i_x, i_y;
- vout_PlacePicture( p_vout, p_vout->p_sys->p_win->i_width,
- p_vout->p_sys->p_win->i_height,
- &i_x, &i_y, &i_width, &i_height );
- glViewport( 0, 0, (GLint)i_width, (GLint)i_height );
- if( p_sys->b_glx13 )
- {
- glXSwapBuffers( p_sys->p_display, p_sys->gwnd );
- }
- else
- {
- glXSwapBuffers( p_sys->p_display, p_sys->p_win->video_window );
- }
- }
- void SwitchContext( vout_thread_t *p_vout )
- {
- vout_sys_t *p_sys = p_vout->p_sys;
- /* Change the current OpenGL context */
- if( p_sys->b_glx13 )
- {
- glXMakeContextCurrent( p_sys->p_display, p_sys->gwnd,
- p_sys->gwnd, p_sys->gwctx );
- }
- else
- {
- glXMakeCurrent( p_sys->p_display, p_sys->p_win->video_window,
- p_sys->gwctx );
- }
- }