1 /*****************************************************************************
2 * glx.c: GLX OpenGL provider
3 *****************************************************************************
4 * Copyright (C) 2004 the VideoLAN team
7 * Authors: Cyril Deguet <asmax@videolan.org>
8 * Gildas Bazin <gbazin@videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <errno.h> /* ENOMEM */
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_interface.h>
41 # include <sys/shm.h> /* shmget(), shmctl() */
46 #include <X11/Xutil.h>
47 #include <X11/keysym.h>
49 # include <X11/extensions/XShm.h>
51 #ifdef DPMSINFO_IN_DPMS_H
52 # include <X11/extensions/dpms.h>
60 //#define VLCGL_RGB_FORMAT GL_RGB
61 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
64 //#define VLCGL_RGB_FORMAT GL_RGB
65 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
68 #define VLCGL_RGB_FORMAT GL_RGBA
69 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
72 /*****************************************************************************
73 * OpenGL provider interface
74 *****************************************************************************/
75 static int CreateOpenGL ( vlc_object_t * );
76 static void DestroyOpenGL( vlc_object_t * );
77 static int InitOpenGL ( vout_thread_t * );
78 static void SwapBuffers ( vout_thread_t * );
80 /*****************************************************************************
82 *****************************************************************************/
83 static int InitGLX12 ( vout_thread_t * );
84 static int InitGLX13 ( vout_thread_t * );
85 static void SwitchContext( vout_thread_t * );
87 /*****************************************************************************
89 *****************************************************************************/
90 #define ADAPTOR_TEXT N_("XVideo adaptor number")
91 #define ADAPTOR_LONGTEXT N_( \
92 "If your graphics card provides several adaptors, you have " \
93 "to choose which one will be used (you shouldn't have to change this).")
95 #define ALT_FS_TEXT N_("Alternate fullscreen method")
96 #define ALT_FS_LONGTEXT N_( \
97 "There are two ways to make a fullscreen window, unfortunately each one " \
98 "has its drawbacks.\n" \
99 "1) Let the window manager handle your fullscreen window (default), but " \
100 "things like taskbars will likely show on top of the video.\n" \
101 "2) Completely bypass the window manager, but then nothing will be able " \
102 "to show on top of the video.")
104 #define DISPLAY_TEXT N_("X11 display")
105 #define DISPLAY_LONGTEXT N_( \
106 "X11 hardware display to use. By default VLC will " \
107 "use the value of the DISPLAY environment variable.")
109 #define SHM_TEXT N_("Use shared memory")
110 #define SHM_LONGTEXT N_( \
111 "Use shared memory to communicate between VLC and the X server.")
113 #define SCREEN_TEXT N_("Screen for fullscreen mode.")
114 #define SCREEN_LONGTEXT N_( \
115 "Screen to use in fullscreen mode. For instance " \
116 "set it to 0 for first screen, 1 for the second.")
119 set_shortname( "OpenGL(GLX)" )
120 set_category( CAT_VIDEO )
121 set_subcategory( SUBCAT_VIDEO_VOUT )
122 set_description( N_("OpenGL(GLX) provider") )
123 set_capability( "opengl provider", 50 )
124 set_callbacks( CreateOpenGL, DestroyOpenGL )
126 add_string( "glx-display", NULL, NULL, DISPLAY_TEXT, DISPLAY_LONGTEXT, true )
127 add_integer( "glx-adaptor", -1, NULL, ADAPTOR_TEXT, ADAPTOR_LONGTEXT, true )
128 add_bool( "glx-altfullscreen", 0, NULL, ALT_FS_TEXT, ALT_FS_LONGTEXT, true )
129 #ifdef HAVE_SYS_SHM_H
130 add_bool( "glx-shm", 1, NULL, SHM_TEXT, SHM_LONGTEXT, true )
133 add_integer ( "glx-xineramascreen", -1, NULL, SCREEN_TEXT, SCREEN_LONGTEXT, true )
137 /*****************************************************************************
138 * Exported prototypes
139 *****************************************************************************/
140 extern int Activate ( vlc_object_t * );
141 extern void Deactivate ( vlc_object_t * );
143 /*****************************************************************************
144 * CreateOpenGL: initialize an OpenGL provider
145 *****************************************************************************/
146 static int CreateOpenGL( vlc_object_t *p_this )
148 vout_thread_t *p_vout = (vout_thread_t *)p_this;
150 if( Activate( p_this ) != VLC_SUCCESS )
155 /* Set the function pointer */
156 p_vout->pf_init = InitOpenGL;
157 p_vout->pf_swap = SwapBuffers;
162 /*****************************************************************************
163 * DestroyOpenGL: destroys an OpenGL provider
164 *****************************************************************************/
165 static void DestroyOpenGL( vlc_object_t *p_this )
167 vout_thread_t *p_vout = (vout_thread_t *)p_this;
168 vout_sys_t *p_sys = p_vout->p_sys;
170 glXDestroyContext( p_sys->p_display, p_sys->gwctx );
173 glXDestroyWindow( p_sys->p_display, p_sys->gwnd );
176 Deactivate( p_this );
179 /*****************************************************************************
180 * InitOpenGL: initializes OpenGL provider
181 *****************************************************************************/
182 static int InitOpenGL( vout_thread_t *p_vout )
185 if( !p_vout->p_sys->b_glx13 )
187 if( InitGLX12( p_vout ) != VLC_SUCCESS )
194 if( InitGLX13( p_vout ) != VLC_SUCCESS )
200 /* Set the OpenGL context _for the current thread_ */
201 SwitchContext( p_vout );
206 int InitGLX12( vout_thread_t *p_vout )
208 vout_sys_t *p_sys = p_vout->p_sys;
210 int p_attr[] = { GLX_RGBA, GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5,
211 GLX_BLUE_SIZE, 5, GLX_DOUBLEBUFFER, 0 };
213 p_vi = glXChooseVisual( p_sys->p_display,
214 DefaultScreen( p_sys->p_display), p_attr );
217 msg_Err( p_vout, "Cannot get GLX 1.2 visual" );
221 /* Create an OpenGL context */
222 p_sys->gwctx = glXCreateContext( p_sys->p_display, p_vi, 0, True );
226 msg_Err( p_vout, "Cannot create OpenGL context");
233 int InitGLX13( vout_thread_t *p_vout )
235 vout_sys_t *p_sys = p_vout->p_sys;
236 int i_nb, ret = VLC_EGENERIC;
237 GLXFBConfig *p_fbconfs = NULL, fbconf;
238 XWindowAttributes att;
239 static const int p_attr[] = {
240 GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5, GLX_BLUE_SIZE, 5,
241 GLX_DOUBLEBUFFER, True, GLX_X_RENDERABLE, True,
242 GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
246 /* Get the FB configuration */
247 p_fbconfs = glXChooseFBConfig( p_sys->p_display, p_sys->i_screen, p_attr, &i_nb );
248 if( p_fbconfs == NULL )
250 msg_Err( p_vout, "Cannot get FB configurations");
254 /* We should really create the window _after_ the frame buffer
255 * configuration was chosen, instead of selecting the frame buffer from
256 * the window. That requires reworking xcommon.c though.
258 XGetWindowAttributes( p_sys->p_display, p_sys->p_win->video_window, &att );
259 for( int i = 0; i < i_nb && !fbconf; i++ )
263 /* Get the X11 visual */
264 p_vi = glXGetVisualFromFBConfig( p_sys->p_display, p_fbconfs[i] );
268 if( p_vi->visualid == att.visual->visualid )
269 fbconf = p_fbconfs[i];
274 msg_Err( p_vout, "Cannot find matching frame buffer" );
278 /* Create the GLX window */
279 p_sys->gwnd = glXCreateWindow( p_sys->p_display, fbconf,
280 p_sys->p_win->video_window, NULL );
281 if( p_sys->gwnd == None )
283 msg_Err( p_vout, "Cannot create GLX window" );
287 /* Create an OpenGL context */
288 p_sys->gwctx = glXCreateNewContext( p_sys->p_display, fbconf,
289 GLX_RGBA_TYPE, NULL, True );
291 msg_Err( p_vout, "Cannot create OpenGL context");
300 /*****************************************************************************
301 * SwapBuffers: swap front/back buffers
302 *****************************************************************************/
303 static void SwapBuffers( vout_thread_t *p_vout )
305 vout_sys_t *p_sys = p_vout->p_sys;
306 unsigned int i_width, i_height, i_x, i_y;
308 vout_PlacePicture( p_vout, p_vout->p_sys->p_win->i_width,
309 p_vout->p_sys->p_win->i_height,
310 &i_x, &i_y, &i_width, &i_height );
312 glViewport( 0, 0, (GLint)i_width, (GLint)i_height );
316 glXSwapBuffers( p_sys->p_display, p_sys->gwnd );
320 glXSwapBuffers( p_sys->p_display, p_sys->p_win->video_window );
324 void SwitchContext( vout_thread_t *p_vout )
326 vout_sys_t *p_sys = p_vout->p_sys;
328 /* Change the current OpenGL context */
331 glXMakeContextCurrent( p_sys->p_display, p_sys->gwnd,
332 p_sys->gwnd, p_sys->gwctx );
336 glXMakeCurrent( p_sys->p_display, p_sys->p_win->video_window,