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

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 VideoLAN (Centrale Réseaux) and its contributors
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet <asmax@videolan.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Eric Petit <titer@m0k.org>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <errno.h>                                                 /* ENOMEM */
  30 #include <stdlib.h>                                      /* malloc(), free() */
  31 #include <string.h>
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/vout.h>
  35
  36 #ifdef SYS_DARWIN
  37 #include <OpenGL/gl.h>
  38 #include <OpenGL/glext.h>
  39
  40 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  41    This allows sizes which are not powers of 2 */
  42 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  43
  44 /* OS X OpenGL supports YUV. Hehe. */
  45 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  46 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  47 #else
  48
  49 #include <GL/gl.h>
  50 #define VLCGL_TARGET GL_TEXTURE_2D
  51
  52 /* RV16 */
  53 #ifndef GL_UNSIGNED_SHORT_5_6_5
  54 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  55 #endif
  56 //#define VLCGL_RGB_FORMAT GL_RGB
  57 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  58
  59 /* RV24 */
  60 //#define VLCGL_RGB_FORMAT GL_RGB
  61 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  62
  63 /* RV32 */
  64 #define VLCGL_RGB_FORMAT GL_RGBA
  65 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  66
  67 /* Use RGB on Win32/GLX */
  68 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  69 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  70 #endif
  71
  72 #ifndef GL_CLAMP_TO_EDGE
  73 #   define GL_CLAMP_TO_EDGE 0x812F
  74 #endif
  75
  76 /* OpenGL effects */
  77 #define OPENGL_EFFECT_NONE             1
  78 #define OPENGL_EFFECT_CUBE             2
  79 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  80
  81 /*****************************************************************************
  82  * Vout interface
  83  *****************************************************************************/
  84 static int  CreateVout   ( vlc_object_t * );
  85 static void DestroyVout  ( vlc_object_t * );
  86 static int  Init         ( vout_thread_t * );
  87 static void End          ( vout_thread_t * );
  88 static int  Manage       ( vout_thread_t * );
  89 static void Render       ( vout_thread_t *, picture_t * );
  90 static void DisplayVideo ( vout_thread_t *, picture_t * );
  91 static int  Control      ( vout_thread_t *, int, va_list );
  92
  93 static inline int GetAlignedSize( int );
  94
  95 static int InitTextures( vout_thread_t * );
  96 static int SendEvents( vlc_object_t *, char const *,
  97                        vlc_value_t, vlc_value_t, void * );
  98
  99 /*****************************************************************************
 100  * Module descriptor
 101  *****************************************************************************/
 102 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 103 /*****************************************************************************
 104  * Module descriptor
 105  *****************************************************************************/
 106 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 107 #define SPEED_LONGTEXT N_( "If the OpenGL cube effect is enabled, this " \
 108                            "controls its rotation speed." )
 109
 110 #define EFFECT_TEXT N_("Select effect")
 111 #define EFFECT_LONGTEXT N_( \
 112     "Allows you to select different visual effects.")
 113
 114 static char *ppsz_effects[] = {
 115         "none", "cube", "transparent-cube" };
 116 static char *ppsz_effects_text[] = {
 117         N_("None"), N_("Cube"), N_("Transparent Cube") };
 118
 119 vlc_module_begin();
 120     set_shortname( "OpenGL" );
 121     set_category( CAT_VIDEO );
 122     set_subcategory( SUBCAT_VIDEO_VOUT );
 123     set_description( _("OpenGL video output") );
 124 #ifdef SYS_DARWIN
 125     set_capability( "video output", 200 );
 126 #else
 127     set_capability( "video output", 20 );
 128 #endif
 129     add_shortcut( "opengl" );
 130     add_float( "opengl-cube-speed", 2.0, NULL, SPEED_TEXT,
 131                     SPEED_LONGTEXT, VLC_TRUE );
 132     set_callbacks( CreateVout, DestroyVout );
 133     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 134                  EFFECT_LONGTEXT, VLC_FALSE );
 135         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 136 vlc_module_end();
 137
 138 /*****************************************************************************
 139  * vout_sys_t: video output method descriptor
 140  *****************************************************************************
 141  * This structure is part of the video output thread descriptor.
 142  * It describes the OpenGL specific properties of the output thread.
 143  *****************************************************************************/
 144 struct vout_sys_t
 145 {
 146     vout_thread_t *p_vout;
 147
 148     uint8_t    *pp_buffer[2];
 149     int         i_index;
 150     int         i_tex_width;
 151     int         i_tex_height;
 152     GLuint      p_textures[2];
 153
 154     int         i_effect;
 155
 156     float       f_speed;
 157 };
 158
 159 /*****************************************************************************
 160  * CreateVout: This function allocates and initializes the OpenGL vout method.
 161  *****************************************************************************/
 162 static int CreateVout( vlc_object_t *p_this )
 163 {
 164     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 165     vout_sys_t *p_sys;
 166
 167     /* Allocate structure */
 168     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 169     if( p_sys == NULL )
 170     {
 171         msg_Err( p_vout, "out of memory" );
 172         return VLC_EGENERIC;
 173     }
 174
 175     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 176
 177     p_sys->i_index = 0;
 178 #ifdef SYS_DARWIN
 179     p_sys->i_tex_width  = p_vout->render.i_width;
 180     p_sys->i_tex_height = p_vout->render.i_height;
 181 #else
 182     /* A texture must have a size aligned on a power of 2 */
 183     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 184     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 185 #endif
 186
 187     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 188              p_sys->i_tex_height );
 189
 190     /* Get window */
 191     p_sys->p_vout =
 192         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 193     if( p_sys->p_vout == NULL )
 194     {
 195         msg_Err( p_vout, "out of memory" );
 196         return VLC_ENOMEM;
 197     }
 198     vlc_object_attach( p_sys->p_vout, p_this );
 199
 200     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 201     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 202     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 203     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 204     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 205     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 206     p_sys->p_vout->b_scale = p_vout->b_scale;
 207     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 208
 209     p_sys->p_vout->p_module =
 210         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 211     if( p_sys->p_vout->p_module == NULL )
 212     {
 213         msg_Warn( p_vout, "No OpenGL provider found" );
 214         vlc_object_detach( p_sys->p_vout );
 215         vlc_object_destroy( p_sys->p_vout );
 216         return VLC_ENOOBJ;
 217     }
 218
 219     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 220
 221     p_vout->pf_init = Init;
 222     p_vout->pf_end = End;
 223     p_vout->pf_manage = Manage;
 224     p_vout->pf_render = Render;
 225     p_vout->pf_display = DisplayVideo;
 226     p_vout->pf_control = Control;
 227
 228     /* Forward events from the opengl provider */
 229     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 230     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 231     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 232     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 233     var_Create( p_sys->p_vout, "video-on-top",
 234                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 235
 236     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 237     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 238     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 239     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 240
 241     return VLC_SUCCESS;
 242 }
 243
 244 /*****************************************************************************
 245  * Init: initialize the OpenGL video thread output method
 246  *****************************************************************************/
 247 static int Init( vout_thread_t *p_vout )
 248 {
 249     vout_sys_t *p_sys = p_vout->p_sys;
 250     int i_pixel_pitch;
 251     vlc_value_t val;
 252
 253     p_sys->p_vout->pf_init( p_sys->p_vout );
 254
 255 #ifdef SYS_DARWIN
 256     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 257     p_vout->output.i_rmask = 0x00ff0000;
 258     p_vout->output.i_gmask = 0x0000ff00;
 259     p_vout->output.i_bmask = 0x000000ff;
 260     i_pixel_pitch = 2;
 261 #else
 262 #if VLCGL_RGB_FORMAT == GL_RGB
 263 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 264     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 265     p_vout->output.i_rmask = 0x000000ff;
 266     p_vout->output.i_gmask = 0x0000ff00;
 267     p_vout->output.i_bmask = 0x00ff0000;
 268     i_pixel_pitch = 3;
 269 #   else
 270     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 271     p_vout->output.i_rmask = 0xf800;
 272     p_vout->output.i_gmask = 0x07e0;
 273     p_vout->output.i_bmask = 0x001f;
 274     i_pixel_pitch = 2;
 275 #   endif
 276 #else
 277     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 278     p_vout->output.i_rmask = 0x000000ff;
 279     p_vout->output.i_gmask = 0x0000ff00;
 280     p_vout->output.i_bmask = 0x00ff0000;
 281     i_pixel_pitch = 4;
 282 #endif
 283 #endif
 284
 285     /* Since OpenGL can do rescaling for us, stick to the default
 286      * coordinates and aspect. */
 287     p_vout->output.i_width  = p_vout->render.i_width;
 288     p_vout->output.i_height = p_vout->render.i_height;
 289     p_vout->output.i_aspect = p_vout->render.i_aspect;
 290
 291     /* We know the chroma, allocate one buffer which will be used
 292      * directly by the decoder */
 293     p_sys->pp_buffer[0] =
 294         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 295     if( !p_sys->pp_buffer[0] )
 296     {
 297         msg_Err( p_vout, "Out of memory" );
 298         return -1;
 299     }
 300     p_sys->pp_buffer[1] =
 301         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 302     if( !p_sys->pp_buffer[1] )
 303     {
 304         msg_Err( p_vout, "Out of memory" );
 305         return -1;
 306     }
 307
 308     p_vout->p_picture[0].i_planes = 1;
 309     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 310     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 311     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 312     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 313     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 314         p_vout->p_picture[0].p->i_pixel_pitch;
 315     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 316         p_vout->p_picture[0].p->i_pixel_pitch;
 317
 318     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 319     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 320
 321     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 322
 323     I_OUTPUTPICTURES = 1;
 324
 325     if( p_sys->p_vout->pf_lock &&
 326         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 327     {
 328         msg_Warn( p_vout, "could not lock OpenGL provider" );
 329         return 0;
 330     }
 331
 332     InitTextures( p_vout );
 333
 334     glDisable(GL_BLEND);
 335     glDisable(GL_DEPTH_TEST);
 336     glDepthMask(GL_FALSE);
 337     glDisable(GL_CULL_FACE);
 338     glClear( GL_COLOR_BUFFER_BIT );
 339
 340     /* Check if the user asked for useless visual effects */
 341     var_Get( p_vout, "opengl-effect", &val );
 342     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 343     {
 344         p_sys->i_effect = OPENGL_EFFECT_NONE;
 345     }
 346     else if( !strcmp( val.psz_string, "cube" ) )
 347     {
 348         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 349
 350         glEnable( GL_CULL_FACE);
 351         //glEnable( GL_DEPTH_TEST );
 352     }
 353     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 354     {
 355         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 356
 357         glDisable( GL_DEPTH_TEST );
 358         glEnable( GL_BLEND );
 359         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 360     }
 361     else
 362     {
 363         msg_Warn( p_vout, "no valid opengl effect provided, using "
 364                   "\"none\"" );
 365         p_sys->i_effect = OPENGL_EFFECT_NONE;
 366     }
 367     if( val.psz_string ) free( val.psz_string );
 368
 369     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 370                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 371     {
 372         /* Set the perpective */
 373         glMatrixMode( GL_PROJECTION );
 374         glLoadIdentity();
 375         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 376         glMatrixMode( GL_MODELVIEW );
 377         glLoadIdentity();
 378         glTranslatef( 0.0, 0.0, - 5.0 );
 379     }
 380
 381     if( p_sys->p_vout->pf_unlock )
 382     {
 383         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 384     }
 385
 386     return 0;
 387 }
 388
 389 /*****************************************************************************
 390  * End: terminate GLX video thread output method
 391  *****************************************************************************/
 392 static void End( vout_thread_t *p_vout )
 393 {
 394     vout_sys_t *p_sys = p_vout->p_sys;
 395
 396     if( p_sys->p_vout->pf_lock &&
 397         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 398     {
 399         msg_Warn( p_vout, "could not lock OpenGL provider" );
 400         return;
 401     }
 402
 403     glFinish();
 404     glFlush();
 405
 406     if( p_sys->p_vout->pf_unlock )
 407     {
 408         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 409     }
 410 }
 411
 412 /*****************************************************************************
 413  * Destroy: destroy GLX video thread output method
 414  *****************************************************************************
 415  * Terminate an output method created by CreateVout
 416  *****************************************************************************/
 417 static void DestroyVout( vlc_object_t *p_this )
 418 {
 419     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 420     vout_sys_t *p_sys = p_vout->p_sys;
 421
 422     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 423     vlc_object_detach( p_sys->p_vout );
 424     vlc_object_destroy( p_sys->p_vout );
 425
 426     /* Free the texture buffer*/
 427     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 428     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 429
 430     free( p_sys );
 431 }
 432
 433 /*****************************************************************************
 434  * Manage: handle Sys events
 435  *****************************************************************************
 436  * This function should be called regularly by video output thread. It returns
 437  * a non null value if an error occurred.
 438  *****************************************************************************/
 439 static int Manage( vout_thread_t *p_vout )
 440 {
 441     vout_sys_t *p_sys = p_vout->p_sys;
 442     int i_ret, i_fullscreen_change;
 443
 444     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 445
 446     p_sys->p_vout->i_changes = p_vout->i_changes;
 447     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 448     p_vout->i_changes = p_sys->p_vout->i_changes;
 449
 450 #ifdef SYS_DARWIN
 451     if( p_sys->p_vout->pf_lock &&
 452         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 453     {
 454         msg_Warn( p_vout, "could not lock OpenGL provider" );
 455         return i_ret;
 456     }
 457
 458     /* On OS X, we create the window and the GL view when entering
 459        fullscreen - the textures have to be inited again */
 460     if( i_fullscreen_change )
 461     {
 462         InitTextures( p_vout );
 463
 464         switch( p_sys->i_effect )
 465         {
 466             case OPENGL_EFFECT_CUBE:
 467                 glEnable( GL_CULL_FACE );
 468                 break;
 469
 470             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 471                 glDisable( GL_DEPTH_TEST );
 472                 glEnable( GL_BLEND );
 473                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 474                 break;
 475         }
 476
 477         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 478                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 479         {
 480             /* Set the perpective */
 481             glMatrixMode( GL_PROJECTION );
 482             glLoadIdentity();
 483             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 484             glMatrixMode( GL_MODELVIEW );
 485             glLoadIdentity();
 486             glTranslatef( 0.0, 0.0, - 5.0 );
 487         }
 488     }
 489
 490     if( p_sys->p_vout->pf_unlock )
 491     {
 492         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 493     }
 494 #endif
 495
 496     return i_ret;
 497 }
 498
 499 /*****************************************************************************
 500  * Render: render previously calculated output
 501  *****************************************************************************/
 502 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 503 {
 504     vout_sys_t *p_sys = p_vout->p_sys;
 505
 506     /* On Win32/GLX, we do this the usual way:
 507        + Fill the buffer with new content,
 508        + Reload the texture,
 509        + Use the texture.
 510
 511        On OS X with VRAM or AGP texturing, the order has to be:
 512        + Reload the texture,
 513        + Fill the buffer with new content,
 514        + Use the texture.
 515
 516        (Thanks to gcc from the Arstechnica forums for the tip)
 517
 518        Therefore, we have to use two buffers and textures. On Win32/GLX,
 519        we reload the texture to be displayed and use it right away. On
 520        OS X, we first render, then reload the texture to be used next
 521        time. */
 522
 523     if( p_sys->p_vout->pf_lock &&
 524         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 525     {
 526         msg_Warn( p_vout, "could not lock OpenGL provider" );
 527         return;
 528     }
 529
 530 #ifdef SYS_DARWIN
 531     int i_new_index;
 532     i_new_index = ( p_sys->i_index + 1 ) & 1;
 533
 534
 535     /* Update the texture */
 536     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 537     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 538                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 539                      p_sys->pp_buffer[i_new_index] );
 540
 541     /* Bind to the previous texture for drawing */
 542     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 543
 544     /* Switch buffers */
 545     p_sys->i_index = i_new_index;
 546     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 547
 548 #else
 549     /* Update the texture */
 550     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 551                      p_vout->render.i_width, p_vout->render.i_height,
 552                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 553 #endif
 554
 555     if( p_sys->p_vout->pf_unlock )
 556     {
 557         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 558     }
 559 }
 560
 561 /*****************************************************************************
 562  * DisplayVideo: displays previously rendered output
 563  *****************************************************************************/
 564 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 565 {
 566     vout_sys_t *p_sys = p_vout->p_sys;
 567     float f_width, f_height;
 568
 569     if( p_sys->p_vout->pf_lock &&
 570         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 571     {
 572         msg_Warn( p_vout, "could not lock OpenGL provider" );
 573         return;
 574     }
 575
 576     /* glTexCoord works differently with GL_TEXTURE_2D and
 577        GL_TEXTURE_RECTANGLE_EXT */
 578 #ifdef SYS_DARWIN
 579     f_width = (float)p_vout->output.i_width;
 580     f_height = (float)p_vout->output.i_height;
 581 #else
 582     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 583     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 584 #endif
 585
 586     /* Why drawing here and not in Render()? Because this way, the
 587        OpenGL providers can call pf_display to force redraw. Currently,
 588        the OS X provider uses it to get a smooth window resizing */
 589
 590     glClear( GL_COLOR_BUFFER_BIT );
 591
 592     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 593     {
 594         glEnable( VLCGL_TARGET );
 595         glBegin( GL_POLYGON );
 596         glTexCoord2f( 0.5, 0.5 ); glVertex2f( -1.0, 1.0 );
 597         glTexCoord2f( f_width - 0.5, 0.5 ); glVertex2f( 1.0, 1.0 );
 598         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex2f( 1.0, -1.0 );
 599         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex2f( -1.0, -1.0 );
 600         glEnd();
 601     }
 602     else
 603     {
 604         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 605
 606         glEnable( VLCGL_TARGET );
 607         glBegin( GL_QUADS );
 608
 609         /* Front */
 610         glTexCoord2f( 0.5, 0.5 ); glVertex3f( - 1.0, 1.0, 1.0 );
 611         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 612         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex3f( 1.0, - 1.0, 1.0 );
 613         glTexCoord2f( f_width - 0.5, 0.5 ); glVertex3f( 1.0, 1.0, 1.0 );
 614
 615         /* Left */
 616         glTexCoord2f( 0.5, 0.5 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 617         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 618         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 619         glTexCoord2f( f_width - 0.5, 0.5 ); glVertex3f( - 1.0, 1.0, 1.0 );
 620
 621         /* Back */
 622         glTexCoord2f( 0.5, 0.5 ); glVertex3f( 1.0, 1.0, - 1.0 );
 623         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex3f( 1.0, - 1.0, - 1.0 );
 624         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 625         glTexCoord2f( f_width - 0.5, 0.5 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 626
 627         /* Right */
 628         glTexCoord2f( 0.5, 0.5 ); glVertex3f( 1.0, 1.0, 1.0 );
 629         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex3f( 1.0, - 1.0, 1.0 );
 630         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex3f( 1.0, - 1.0, - 1.0 );
 631         glTexCoord2f( f_width - 0.5, 0.5 ); glVertex3f( 1.0, 1.0, - 1.0 );
 632
 633         /* Top */
 634         glTexCoord2f( 0.5, 0.5 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 635         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex3f( - 1.0, 1.0, 1.0 );
 636         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex3f( 1.0, 1.0, 1.0 );
 637         glTexCoord2f( 0.5, f_height - 0.5 ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 638         glTexCoord2f( f_width - 0.5, f_height - 0.5 ); glVertex3f( 1.0, - 1.0, - 1.0 );
 639         glTexCoord2f( f_width - 0.5, 0.5 ); glVertex3f( 1.0, - 1.0, 1.0 );
 640         glEnd();
 641     }
 642
 643     glDisable( VLCGL_TARGET );
 644
 645     p_sys->p_vout->pf_swap( p_sys->p_vout );
 646
 647     if( p_sys->p_vout->pf_unlock )
 648     {
 649         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 650     }
 651 }
 652
 653 int GetAlignedSize( int i_size )
 654 {
 655     /* Return the nearest power of 2 */
 656     int i_result = 1;
 657     while( i_result < i_size )
 658     {
 659         i_result *= 2;
 660     }
 661     return i_result;
 662 }
 663
 664 /*****************************************************************************
 665  * Control: control facility for the vout
 666  *****************************************************************************/
 667 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 668 {
 669     vout_sys_t *p_sys = p_vout->p_sys;
 670
 671     switch( i_query )
 672     {
 673     case VOUT_SNAPSHOT:
 674         return vout_vaControlDefault( p_vout, i_query, args );
 675
 676     default:
 677         if( p_sys->p_vout->pf_control )
 678             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 679         else
 680             return vout_vaControlDefault( p_vout, i_query, args );
 681     }
 682 }
 683
 684 static int InitTextures( vout_thread_t *p_vout )
 685 {
 686     vout_sys_t *p_sys = p_vout->p_sys;
 687     int i_index;
 688
 689     glDeleteTextures( 2, p_sys->p_textures );
 690     glGenTextures( 2, p_sys->p_textures );
 691
 692     for( i_index = 0; i_index < 2; i_index++ )
 693     {
 694         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 695
 696         /* Set the texture parameters */
 697         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 698
 699         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 700         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 701
 702         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 703         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 704
 705         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 706
 707 #ifdef SYS_DARWIN
 708         /* Tell the driver not to make a copy of the texture but to use
 709            our buffer */
 710         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 711         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 712
 713 #if 0
 714         /* Use VRAM texturing */
 715         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 716                          GL_STORAGE_CACHED_APPLE );
 717 #else
 718         /* Use AGP texturing */
 719         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 720                          GL_STORAGE_SHARED_APPLE );
 721 #endif
 722 #endif
 723
 724         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 725         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 726                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 727                       p_sys->pp_buffer[i_index] );
 728     }
 729
 730     return 0;
 731 }
 732
 733 /*****************************************************************************
 734  * SendEvents: forward mouse and keyboard events to the parent p_vout
 735  *****************************************************************************/
 736 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 737                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 738 {
 739     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 740 }