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 DISPLAY_TEXT N_("X11 display")
96 #define DISPLAY_LONGTEXT N_( \
97 "X11 hardware display to use. By default VLC will " \
98 "use the value of the DISPLAY environment variable.")
100 #define SHM_TEXT N_("Use shared memory")
101 #define SHM_LONGTEXT N_( \
102 "Use shared memory to communicate between VLC and the X server.")
105 set_shortname( "OpenGL(GLX)" )
106 set_category( CAT_VIDEO )
107 set_subcategory( SUBCAT_VIDEO_VOUT )
108 set_description( N_("OpenGL(GLX) provider") )
109 set_capability( "opengl provider", 50 )
110 set_callbacks( CreateOpenGL, DestroyOpenGL )
112 add_string( "glx-display", NULL, NULL, DISPLAY_TEXT, DISPLAY_LONGTEXT, true )
113 add_integer( "glx-adaptor", -1, NULL, ADAPTOR_TEXT, ADAPTOR_LONGTEXT, true )
114 #ifdef HAVE_SYS_SHM_H
115 add_bool( "glx-shm", 1, NULL, SHM_TEXT, SHM_LONGTEXT, true )
119 /*****************************************************************************
120 * Exported prototypes
121 *****************************************************************************/
122 extern int Activate ( vlc_object_t * );
123 extern void Deactivate ( vlc_object_t * );
125 /*****************************************************************************
126 * CreateOpenGL: initialize an OpenGL provider
127 *****************************************************************************/
128 static int CreateOpenGL( vlc_object_t *p_this )
130 vout_thread_t *p_vout = (vout_thread_t *)p_this;
132 if( Activate( p_this ) != VLC_SUCCESS )
137 /* Set the function pointer */
138 p_vout->pf_init = InitOpenGL;
139 p_vout->pf_swap = SwapBuffers;
144 /*****************************************************************************
145 * DestroyOpenGL: destroys an OpenGL provider
146 *****************************************************************************/
147 static void DestroyOpenGL( vlc_object_t *p_this )
149 vout_thread_t *p_vout = (vout_thread_t *)p_this;
150 vout_sys_t *p_sys = p_vout->p_sys;
152 glXDestroyContext( p_sys->p_display, p_sys->gwctx );
155 glXDestroyWindow( p_sys->p_display, p_sys->gwnd );
158 Deactivate( p_this );
161 /*****************************************************************************
162 * InitOpenGL: initializes OpenGL provider
163 *****************************************************************************/
164 static int InitOpenGL( vout_thread_t *p_vout )
167 if( !p_vout->p_sys->b_glx13 )
169 if( InitGLX12( p_vout ) != VLC_SUCCESS )
176 if( InitGLX13( p_vout ) != VLC_SUCCESS )
182 /* Set the OpenGL context _for the current thread_ */
183 SwitchContext( p_vout );
188 int InitGLX12( vout_thread_t *p_vout )
190 vout_sys_t *p_sys = p_vout->p_sys;
192 int p_attr[] = { GLX_RGBA, GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5,
193 GLX_BLUE_SIZE, 5, GLX_DOUBLEBUFFER, 0 };
195 p_vi = glXChooseVisual( p_sys->p_display,
196 DefaultScreen( p_sys->p_display), p_attr );
199 msg_Err( p_vout, "Cannot get GLX 1.2 visual" );
203 /* Create an OpenGL context */
204 p_sys->gwctx = glXCreateContext( p_sys->p_display, p_vi, 0, True );
208 msg_Err( p_vout, "Cannot create OpenGL context");
215 int InitGLX13( vout_thread_t *p_vout )
217 vout_sys_t *p_sys = p_vout->p_sys;
218 int i_nb, ret = VLC_EGENERIC;
219 GLXFBConfig *p_fbconfs = NULL, fbconf = NULL;
220 XWindowAttributes att;
221 static const int p_attr[] = {
222 GLX_RED_SIZE, 5, GLX_GREEN_SIZE, 5, GLX_BLUE_SIZE, 5,
223 GLX_DOUBLEBUFFER, True, GLX_X_RENDERABLE, True,
224 GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
228 /* Get the FB configuration */
229 p_fbconfs = glXChooseFBConfig( p_sys->p_display, p_sys->i_screen, p_attr, &i_nb );
230 if( p_fbconfs == NULL )
232 msg_Err( p_vout, "Cannot get FB configurations");
236 /* We should really create the window _after_ the frame buffer
237 * configuration was chosen, instead of selecting the frame buffer from
238 * the window. That requires reworking xcommon.c though.
240 XGetWindowAttributes( p_sys->p_display, p_sys->window.video_window, &att );
241 for( int i = 0; i < i_nb && !fbconf; i++ )
245 /* Get the X11 visual */
246 p_vi = glXGetVisualFromFBConfig( p_sys->p_display, p_fbconfs[i] );
250 if( p_vi->visualid == att.visual->visualid )
251 fbconf = p_fbconfs[i];
256 msg_Err( p_vout, "Cannot find matching frame buffer" );
260 /* Create the GLX window */
261 p_sys->gwnd = glXCreateWindow( p_sys->p_display, fbconf,
262 p_sys->window.video_window, NULL );
263 if( p_sys->gwnd == None )
265 msg_Err( p_vout, "Cannot create GLX window" );
269 /* Create an OpenGL context */
270 p_sys->gwctx = glXCreateNewContext( p_sys->p_display, fbconf,
271 GLX_RGBA_TYPE, NULL, True );
273 msg_Err( p_vout, "Cannot create OpenGL context");
282 /*****************************************************************************
283 * SwapBuffers: swap front/back buffers
284 *****************************************************************************/
285 static void SwapBuffers( vout_thread_t *p_vout )
287 vout_sys_t *p_sys = p_vout->p_sys;
288 unsigned int i_width, i_height, i_x, i_y;
290 vout_PlacePicture( p_vout, p_vout->p_sys->window.i_width,
291 p_vout->p_sys->window.i_height,
292 &i_x, &i_y, &i_width, &i_height );
294 glViewport( 0, 0, (GLint)i_width, (GLint)i_height );
298 glXSwapBuffers( p_sys->p_display, p_sys->gwnd );
302 glXSwapBuffers( p_sys->p_display, p_sys->window.video_window );
306 void SwitchContext( vout_thread_t *p_vout )
308 vout_sys_t *p_sys = p_vout->p_sys;
310 /* Change the current OpenGL context */
313 glXMakeContextCurrent( p_sys->p_display, p_sys->gwnd,
314 p_sys->gwnd, p_sys->gwctx );
318 glXMakeCurrent( p_sys->p_display, p_sys->window.video_window,