git.sesse.net Git - vlc/blob - modules/video_output/opengl.c

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet <asmax@videolan.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  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.
  14  *
  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.
  19  *
  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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <stdlib.h>                                      /* malloc(), free() */
  30 #include <string.h>
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/vout.h>
  34
  35 #ifdef SYS_DARWIN
  36 #include <OpenGL/gl.h>
  37 #include <OpenGL/glext.h>
  38
  39 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  40    This allows sizes which are not powers of 2 */
  41 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  42
  43 /* OS X OpenGL supports YUV. Hehe. */
  44 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  45 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  46 #else
  47
  48 #include <GL/gl.h>
  49 #define VLCGL_TARGET GL_TEXTURE_2D
  50
  51 /* RV16 */
  52 #ifndef GL_UNSIGNED_SHORT_5_6_5
  53 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  54 #endif
  55 //#define VLCGL_RGB_FORMAT GL_RGB
  56 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  57
  58 /* RV24 */
  59 //#define VLCGL_RGB_FORMAT GL_RGB
  60 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  61
  62 /* RV32 */
  63 #define VLCGL_RGB_FORMAT GL_RGBA
  64 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  65
  66 /* Use RGB on Win32/GLX */
  67 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  68 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  69 #endif
  70
  71 /* OpenGL effects */
  72 #define OPENGL_EFFECT_NONE             1
  73 #define OPENGL_EFFECT_CUBE             2
  74 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  75
  76 /*****************************************************************************
  77  * Vout interface
  78  *****************************************************************************/
  79 static int  CreateVout   ( vlc_object_t * );
  80 static void DestroyVout  ( vlc_object_t * );
  81 static int  Init         ( vout_thread_t * );
  82 static void End          ( vout_thread_t * );
  83 static int  Manage       ( vout_thread_t * );
  84 static void Render       ( vout_thread_t *, picture_t * );
  85 static void DisplayVideo ( vout_thread_t *, picture_t * );
  86 static int  Control      ( vout_thread_t *, int, va_list );
  87
  88 static inline int GetAlignedSize( int );
  89
  90 static int SendEvents( vlc_object_t *, char const *,
  91                        vlc_value_t, vlc_value_t, void * );
  92
  93 /*****************************************************************************
  94  * Module descriptor
  95  *****************************************************************************/
  96 #define EFFECT_TEXT N_("Select effect")
  97 #define EFFECT_LONGTEXT N_( \
  98     "Allows you to select different visual effects.")
  99
 100 vlc_module_begin();
 101     set_description( _("OpenGL video output") );
 102     set_capability( "video output", 20 );
 103     add_shortcut( "opengl" );
 104     set_callbacks( CreateVout, DestroyVout );
 105
 106     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 107                  EFFECT_LONGTEXT, VLC_TRUE );
 108 vlc_module_end();
 109
 110 /*****************************************************************************
 111  * vout_sys_t: video output method descriptor
 112  *****************************************************************************
 113  * This structure is part of the video output thread descriptor.
 114  * It describes the OpenGL specific properties of the output thread.
 115  *****************************************************************************/
 116 struct vout_sys_t
 117 {
 118     vout_thread_t *p_vout;
 119
 120     uint8_t    *pp_buffer[2];
 121     int         i_index;
 122     int         i_tex_width;
 123     int         i_tex_height;
 124     GLuint      p_textures[2];
 125
 126     int         i_effect;
 127 };
 128
 129 /*****************************************************************************
 130  * CreateVout: This function allocates and initializes the OpenGL vout method.
 131  *****************************************************************************/
 132 static int CreateVout( vlc_object_t *p_this )
 133 {
 134     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 135     vout_sys_t *p_sys;
 136
 137     /* Allocate structure */
 138     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 139     if( p_sys == NULL )
 140     {
 141         msg_Err( p_vout, "out of memory" );
 142         return VLC_EGENERIC;
 143     }
 144
 145     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 146
 147 #ifdef SYS_DARWIN
 148     p_sys->i_tex_width  = p_vout->render.i_width;
 149     p_sys->i_tex_height = p_vout->render.i_height;
 150 #else
 151     /* A texture must have a size aligned on a power of 2 */
 152     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 153     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 154 #endif
 155
 156     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 157              p_sys->i_tex_height );
 158
 159     /* Get window */
 160     p_sys->p_vout =
 161         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 162     if( p_sys->p_vout == NULL )
 163     {
 164         msg_Err( p_vout, "out of memory" );
 165         return VLC_ENOMEM;
 166     }
 167     vlc_object_attach( p_sys->p_vout, p_this );
 168
 169     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 170     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 171     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 172     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 173     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 174     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 175     p_sys->p_vout->b_scale = p_vout->b_scale;
 176     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 177
 178     p_sys->p_vout->p_module =
 179         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 180     if( p_sys->p_vout->p_module == NULL )
 181     {
 182         msg_Err( p_vout, "No OpenGL provider found" );
 183         vlc_object_detach( p_sys->p_vout );
 184         vlc_object_destroy( p_sys->p_vout );
 185         return VLC_ENOOBJ;
 186     }
 187
 188     p_vout->pf_init = Init;
 189     p_vout->pf_end = End;
 190     p_vout->pf_manage = Manage;
 191     p_vout->pf_render = Render;
 192     p_vout->pf_display = DisplayVideo;
 193     p_vout->pf_control = Control;
 194
 195     /* Forward events from the opengl provider */
 196     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 197     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 198     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 199     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 200
 201     return VLC_SUCCESS;
 202 }
 203
 204 /*****************************************************************************
 205  * Init: initialize the OpenGL video thread output method
 206  *****************************************************************************/
 207 static int Init( vout_thread_t *p_vout )
 208 {
 209     vout_sys_t *p_sys = p_vout->p_sys;
 210     int i_pixel_pitch, i_index;
 211     vlc_value_t val;
 212
 213     p_sys->p_vout->pf_init( p_sys->p_vout );
 214
 215 #ifdef SYS_DARWIN
 216     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 217     p_vout->output.i_rmask = 0x00ff0000;
 218     p_vout->output.i_gmask = 0x0000ff00;
 219     p_vout->output.i_bmask = 0x000000ff;
 220     i_pixel_pitch = 2;
 221 #else
 222 #if VLCGL_RGB_FORMAT == GL_RGB
 223 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 224     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 225     p_vout->output.i_rmask = 0x000000ff;
 226     p_vout->output.i_gmask = 0x0000ff00;
 227     p_vout->output.i_bmask = 0x00ff0000;
 228     i_pixel_pitch = 3;
 229 #   else
 230     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 231     p_vout->output.i_rmask = 0xf800;
 232     p_vout->output.i_gmask = 0x07e0;
 233     p_vout->output.i_bmask = 0x001f;
 234     i_pixel_pitch = 2;
 235 #   endif
 236 #else
 237     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 238     p_vout->output.i_rmask = 0x000000ff;
 239     p_vout->output.i_gmask = 0x0000ff00;
 240     p_vout->output.i_bmask = 0x00ff0000;
 241     i_pixel_pitch = 4;
 242 #endif
 243 #endif
 244
 245     /* Since OpenGL can do rescaling for us, stick to the default
 246      * coordinates and aspect. */
 247     p_vout->output.i_width  = p_vout->render.i_width;
 248     p_vout->output.i_height = p_vout->render.i_height;
 249     p_vout->output.i_aspect = p_vout->render.i_aspect;
 250
 251     /* We know the chroma, allocate one buffer which will be used
 252      * directly by the decoder */
 253     p_sys->pp_buffer[0] =
 254         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 255     if( !p_sys->pp_buffer[0] )
 256     {
 257         msg_Err( p_vout, "Out of memory" );
 258         return -1;
 259     }
 260     p_sys->pp_buffer[1] =
 261         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 262     if( !p_sys->pp_buffer[1] )
 263     {
 264         msg_Err( p_vout, "Out of memory" );
 265         return -1;
 266     }
 267
 268     p_vout->p_picture[0].i_planes = 1;
 269     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 270     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 271     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 272     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 273         p_vout->p_picture[0].p->i_pixel_pitch;
 274     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 275         p_vout->p_picture[0].p->i_pixel_pitch;
 276
 277     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 278     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 279
 280     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 281
 282     I_OUTPUTPICTURES = 1;
 283
 284     glGenTextures( 2, p_sys->p_textures );
 285
 286     for( i_index = 0; i_index < 2; i_index++ )
 287     {
 288         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 289
 290         /* Set the texture parameters */
 291         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 292
 293         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 294         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 295
 296         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP );
 297         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP );
 298
 299         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 300
 301 #ifdef SYS_DARWIN
 302         /* Tell the driver not to make a copy of the texture but to use
 303            our buffer */
 304         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 305         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 306
 307 #if 0
 308         /* Use VRAM texturing */
 309         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 310                          GL_STORAGE_CACHED_APPLE );
 311 #else
 312         /* Use AGP texturing */
 313         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 314                          GL_STORAGE_SHARED_APPLE );
 315 #endif
 316 #endif
 317
 318         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 319         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 320                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 321                       p_sys->pp_buffer[i_index] );
 322     }
 323
 324     glDisable(GL_BLEND);
 325     glDisable(GL_DEPTH_TEST);
 326     glDepthMask(GL_FALSE);
 327     glDisable(GL_CULL_FACE);
 328     glClear( GL_COLOR_BUFFER_BIT );
 329
 330     /* Check if the user asked for useless visual effects */
 331     var_Get( p_vout, "opengl-effect", &val );
 332     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 333     {
 334         p_sys->i_effect = OPENGL_EFFECT_NONE;
 335     }
 336     else if( !strcmp( val.psz_string, "cube" ) )
 337     {
 338         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 339
 340         glEnable( GL_CULL_FACE);
 341         //glEnable( GL_DEPTH_TEST );
 342     }
 343     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 344     {
 345         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 346
 347         glDisable( GL_DEPTH_TEST );
 348         glEnable( GL_BLEND );
 349         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 350     }
 351     else
 352     {
 353         msg_Warn( p_vout, "no valid opengl effect provided, using "
 354                   "\"none\"" );
 355         p_sys->i_effect = OPENGL_EFFECT_NONE;
 356     }
 357     if( val.psz_string ) free( val.psz_string );
 358
 359     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 360                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 361     {
 362         /* Set the perpective */
 363         glMatrixMode( GL_PROJECTION );
 364         glLoadIdentity();
 365         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 366         glMatrixMode( GL_MODELVIEW );
 367         glLoadIdentity();
 368         glTranslatef( 0.0, 0.0, - 5.0 );
 369     }
 370
 371     return 0;
 372 }
 373
 374 /*****************************************************************************
 375  * End: terminate GLX video thread output method
 376  *****************************************************************************/
 377 static void End( vout_thread_t *p_vout )
 378 {
 379     glFinish();
 380     glFlush();
 381 }
 382
 383 /*****************************************************************************
 384  * Destroy: destroy GLX video thread output method
 385  *****************************************************************************
 386  * Terminate an output method created by CreateVout
 387  *****************************************************************************/
 388 static void DestroyVout( vlc_object_t *p_this )
 389 {
 390     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 391     vout_sys_t *p_sys = p_vout->p_sys;
 392
 393     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 394     vlc_object_detach( p_sys->p_vout );
 395     vlc_object_destroy( p_sys->p_vout );
 396
 397     /* Free the texture buffer*/
 398     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 399     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 400
 401     free( p_sys );
 402 }
 403
 404 /*****************************************************************************
 405  * Manage: handle Sys events
 406  *****************************************************************************
 407  * This function should be called regularly by video output thread. It returns
 408  * a non null value if an error occured.
 409  *****************************************************************************/
 410 static int Manage( vout_thread_t *p_vout )
 411 {
 412     vout_sys_t *p_sys = p_vout->p_sys;
 413     return p_sys->p_vout->pf_manage( p_sys->p_vout );
 414 }
 415
 416 /*****************************************************************************
 417  * Render: render previously calculated output
 418  *****************************************************************************/
 419 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 420 {
 421     vout_sys_t *p_sys = p_vout->p_sys;
 422     float f_width, f_height;
 423
 424     /* glTexCoord works differently with GL_TEXTURE_2D and
 425        GL_TEXTURE_RECTANGLE_EXT */
 426 #ifdef SYS_DARWIN
 427     f_width = (float)p_vout->output.i_width;
 428     f_height = (float)p_vout->output.i_height;
 429 #else
 430     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 431     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 432 #endif
 433
 434     glClear( GL_COLOR_BUFFER_BIT );
 435
 436     /* On Win32/GLX, we do this the usual way:
 437        + Fill the buffer with new content,
 438        + Reload the texture,
 439        + Use the texture.
 440
 441        On OS X with VRAM or AGP texturing, the order has to be:
 442        + Reload the texture,
 443        + Fill the buffer with new content,
 444        + Use the texture.
 445
 446        (Thanks to gcc from the Arstechnica forums for the tip)
 447
 448        Therefore, we have to use two buffers and textures. On Win32/GLX,
 449        we reload the texture to be displayed and use it right away. On
 450        OS X, we first render, then reload the texture to be used next
 451        time. */
 452
 453 #ifdef SYS_DARWIN
 454     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 455 #else
 456
 457     /* Update the texture */
 458     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 459                      p_vout->render.i_width, p_vout->render.i_height,
 460                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 461 #endif
 462
 463     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 464     {
 465         glEnable( VLCGL_TARGET );
 466         glBegin( GL_POLYGON );
 467         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 468         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 469         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 470         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 471         glEnd();
 472     }
 473     else
 474     {
 475         glRotatef( 1.0, 0.3, 0.5, 0.7 );
 476
 477         glEnable( VLCGL_TARGET );
 478         glBegin( GL_QUADS );
 479
 480         /* Front */
 481         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 482         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 483         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 484         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 485
 486         /* Left */
 487         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 488         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 489         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 490         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 491
 492         /* Back */
 493         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 494         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 495         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 496         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 497
 498         /* Right */
 499         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 500         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 501         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 502         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 503
 504         /* Top */
 505         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 506         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 507         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 508         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 509
 510         /* Bottom */
 511         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 512         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 513         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 514         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 515         glEnd();
 516     }
 517
 518     glDisable( VLCGL_TARGET );
 519
 520 #ifdef SYS_DARWIN
 521     /* Switch buffers */
 522     p_sys->i_index = ( p_sys->i_index + 1 ) & 1;
 523     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 524
 525     /* Update the texture */
 526     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 527     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 528                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 529                      p_sys->pp_buffer[p_sys->i_index] );
 530 #endif
 531 }
 532
 533 /*****************************************************************************
 534  * DisplayVideo: displays previously rendered output
 535  *****************************************************************************/
 536 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 537 {
 538     vout_sys_t *p_sys = p_vout->p_sys;
 539     p_sys->p_vout->pf_swap( p_sys->p_vout );
 540 }
 541
 542 int GetAlignedSize( int i_size )
 543 {
 544     /* Return the nearest power of 2 */
 545     int i_result = 1;
 546     while( i_result < i_size )
 547     {
 548         i_result *= 2;
 549     }
 550     return i_result;
 551 }
 552
 553 /*****************************************************************************
 554  * Control: control facility for the vout
 555  *****************************************************************************/
 556 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 557 {
 558     vout_sys_t *p_sys = p_vout->p_sys;
 559
 560     if( p_sys->p_vout->pf_control )
 561         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 562     else
 563         return vout_vaControlDefault( p_vout, i_query, args );
 564 }
 565
 566 /*****************************************************************************
 567  * SendEvents: forward mouse and keyboard events to the parent p_vout
 568  *****************************************************************************/
 569 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 570                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 571 {
 572     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 573 }