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

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   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 /* YUY2 */
  68 #ifndef YCBCR_MESA
  69 #define YCBCR_MESA 0x8757
  70 #endif
  71 #ifndef UNSIGNED_SHORT_8_8_MESA
  72 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
  73 #endif
  74 #define VLCGL_YUV_FORMAT YCBCR_MESA
  75 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  76
  77 /* Use RGB on Win32/GLX */
  78 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  79 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  80 //#define VLCGL_FORMAT VLCGL_YUV_FORMAT
  81 //#define VLCGL_TYPE   VLCGL_YUV_TYPE
  82 #endif
  83
  84 #ifndef GL_CLAMP_TO_EDGE
  85 #   define GL_CLAMP_TO_EDGE 0x812F
  86 #endif
  87
  88 /* OpenGL effects */
  89 #define OPENGL_EFFECT_NONE             1
  90 #define OPENGL_EFFECT_CUBE             2
  91 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  92
  93 /*****************************************************************************
  94  * Vout interface
  95  *****************************************************************************/
  96 static int  CreateVout   ( vlc_object_t * );
  97 static void DestroyVout  ( vlc_object_t * );
  98 static int  Init         ( vout_thread_t * );
  99 static void End          ( vout_thread_t * );
 100 static int  Manage       ( vout_thread_t * );
 101 static void Render       ( vout_thread_t *, picture_t * );
 102 static void DisplayVideo ( vout_thread_t *, picture_t * );
 103 static int  Control      ( vout_thread_t *, int, va_list );
 104
 105 static inline int GetAlignedSize( int );
 106
 107 static int InitTextures( vout_thread_t * );
 108 static int SendEvents( vlc_object_t *, char const *,
 109                        vlc_value_t, vlc_value_t, void * );
 110
 111 /*****************************************************************************
 112  * Module descriptor
 113  *****************************************************************************/
 114 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 115 /*****************************************************************************
 116  * Module descriptor
 117  *****************************************************************************/
 118 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 119 #define SPEED_LONGTEXT N_( "If the OpenGL cube effect is enabled, this " \
 120                            "controls its rotation speed." )
 121
 122 #define EFFECT_TEXT N_("Select effect")
 123 #define EFFECT_LONGTEXT N_( \
 124     "Allows you to select different visual effects.")
 125
 126 static char *ppsz_effects[] = {
 127         "none", "cube", "transparent-cube" };
 128 static char *ppsz_effects_text[] = {
 129         N_("None"), N_("Cube"), N_("Transparent Cube") };
 130
 131 vlc_module_begin();
 132     set_shortname( "OpenGL" );
 133     set_category( CAT_VIDEO );
 134     set_subcategory( SUBCAT_VIDEO_VOUT );
 135     set_description( _("OpenGL video output") );
 136 #ifdef SYS_DARWIN
 137     set_capability( "video output", 200 );
 138 #else
 139     set_capability( "video output", 20 );
 140 #endif
 141     add_shortcut( "opengl" );
 142     add_float( "opengl-cube-speed", 2.0, NULL, SPEED_TEXT,
 143                     SPEED_LONGTEXT, VLC_TRUE );
 144     set_callbacks( CreateVout, DestroyVout );
 145     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 146                  EFFECT_LONGTEXT, VLC_FALSE );
 147         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 148 vlc_module_end();
 149
 150 /*****************************************************************************
 151  * vout_sys_t: video output method descriptor
 152  *****************************************************************************
 153  * This structure is part of the video output thread descriptor.
 154  * It describes the OpenGL specific properties of the output thread.
 155  *****************************************************************************/
 156 struct vout_sys_t
 157 {
 158     vout_thread_t *p_vout;
 159
 160     uint8_t    *pp_buffer[2];
 161     int         i_index;
 162     int         i_tex_width;
 163     int         i_tex_height;
 164     GLuint      p_textures[2];
 165
 166     int         i_effect;
 167
 168     float       f_speed;
 169 };
 170
 171 /*****************************************************************************
 172  * CreateVout: This function allocates and initializes the OpenGL vout method.
 173  *****************************************************************************/
 174 static int CreateVout( vlc_object_t *p_this )
 175 {
 176     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 177     vout_sys_t *p_sys;
 178
 179     /* Allocate structure */
 180     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 181     if( p_sys == NULL )
 182     {
 183         msg_Err( p_vout, "out of memory" );
 184         return VLC_EGENERIC;
 185     }
 186
 187     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 188
 189     p_sys->i_index = 0;
 190 #ifdef SYS_DARWIN
 191     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 192     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 193 #else
 194     /* A texture must have a size aligned on a power of 2 */
 195     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 196     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 197 #endif
 198
 199     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 200              p_sys->i_tex_height );
 201
 202     /* Get window */
 203     p_sys->p_vout =
 204         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 205     if( p_sys->p_vout == NULL )
 206     {
 207         msg_Err( p_vout, "out of memory" );
 208         return VLC_ENOMEM;
 209     }
 210     vlc_object_attach( p_sys->p_vout, p_this );
 211
 212     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 213     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 214     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 215     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 216     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 217     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 218     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 219     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 220     p_sys->p_vout->b_scale = p_vout->b_scale;
 221     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 222
 223     p_sys->p_vout->p_module =
 224         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 225     if( p_sys->p_vout->p_module == NULL )
 226     {
 227         msg_Warn( p_vout, "No OpenGL provider found" );
 228         vlc_object_detach( p_sys->p_vout );
 229         vlc_object_destroy( p_sys->p_vout );
 230         return VLC_ENOOBJ;
 231     }
 232
 233     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 234
 235     p_vout->pf_init = Init;
 236     p_vout->pf_end = End;
 237     p_vout->pf_manage = Manage;
 238     p_vout->pf_render = Render;
 239     p_vout->pf_display = DisplayVideo;
 240     p_vout->pf_control = Control;
 241
 242     /* Forward events from the opengl provider */
 243     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 244     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 245     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 246     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 247     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 248     var_Create( p_sys->p_vout, "video-on-top",
 249                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 250
 251     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 252     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 253     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 254     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 255     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 256
 257     return VLC_SUCCESS;
 258 }
 259
 260 /*****************************************************************************
 261  * Init: initialize the OpenGL video thread output method
 262  *****************************************************************************/
 263 static int Init( vout_thread_t *p_vout )
 264 {
 265     vout_sys_t *p_sys = p_vout->p_sys;
 266     int i_pixel_pitch;
 267     vlc_value_t val;
 268
 269     p_sys->p_vout->pf_init( p_sys->p_vout );
 270
 271 #if defined( SYS_DARWIN ) || (VLCGL_FORMAT == YCBCR_MESA)
 272     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 273     i_pixel_pitch = 2;
 274
 275 #elif VLCGL_FORMAT == GL_RGB
 276 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 277     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 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 = 3;
 282 #   else
 283     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 284     p_vout->output.i_rmask = 0xf800;
 285     p_vout->output.i_gmask = 0x07e0;
 286     p_vout->output.i_bmask = 0x001f;
 287     i_pixel_pitch = 2;
 288 #   endif
 289 #else
 290     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 291     p_vout->output.i_rmask = 0x000000ff;
 292     p_vout->output.i_gmask = 0x0000ff00;
 293     p_vout->output.i_bmask = 0x00ff0000;
 294     i_pixel_pitch = 4;
 295 #endif
 296
 297     /* Since OpenGL can do rescaling for us, stick to the default
 298      * coordinates and aspect. */
 299     p_vout->output.i_width  = p_vout->render.i_width;
 300     p_vout->output.i_height = p_vout->render.i_height;
 301     p_vout->output.i_aspect = p_vout->render.i_aspect;
 302
 303     p_vout->fmt_out = p_vout->fmt_in;
 304     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 305
 306     /* We know the chroma, allocate one buffer which will be used
 307      * directly by the decoder */
 308     p_sys->pp_buffer[0] =
 309         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 310     if( !p_sys->pp_buffer[0] )
 311     {
 312         msg_Err( p_vout, "Out of memory" );
 313         return -1;
 314     }
 315     p_sys->pp_buffer[1] =
 316         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 317     if( !p_sys->pp_buffer[1] )
 318     {
 319         msg_Err( p_vout, "Out of memory" );
 320         return -1;
 321     }
 322
 323     p_vout->p_picture[0].i_planes = 1;
 324     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 325     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 326     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 327     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 328     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 329         p_vout->p_picture[0].p->i_pixel_pitch;
 330     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 331         p_vout->p_picture[0].p->i_pixel_pitch;
 332
 333     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 334     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 335
 336     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 337
 338     I_OUTPUTPICTURES = 1;
 339
 340     if( p_sys->p_vout->pf_lock &&
 341         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 342     {
 343         msg_Warn( p_vout, "could not lock OpenGL provider" );
 344         return 0;
 345     }
 346
 347     InitTextures( p_vout );
 348
 349     glDisable(GL_BLEND);
 350     glDisable(GL_DEPTH_TEST);
 351     glDepthMask(GL_FALSE);
 352     glDisable(GL_CULL_FACE);
 353     glClear( GL_COLOR_BUFFER_BIT );
 354
 355     /* Check if the user asked for useless visual effects */
 356     var_Get( p_vout, "opengl-effect", &val );
 357     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 358     {
 359         p_sys->i_effect = OPENGL_EFFECT_NONE;
 360     }
 361     else if( !strcmp( val.psz_string, "cube" ) )
 362     {
 363         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 364
 365         glEnable( GL_CULL_FACE);
 366         //glEnable( GL_DEPTH_TEST );
 367     }
 368     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 369     {
 370         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 371
 372         glDisable( GL_DEPTH_TEST );
 373         glEnable( GL_BLEND );
 374         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 375     }
 376     else
 377     {
 378         msg_Warn( p_vout, "no valid opengl effect provided, using "
 379                   "\"none\"" );
 380         p_sys->i_effect = OPENGL_EFFECT_NONE;
 381     }
 382     if( val.psz_string ) free( val.psz_string );
 383
 384     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 385                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 386     {
 387         /* Set the perpective */
 388         glMatrixMode( GL_PROJECTION );
 389         glLoadIdentity();
 390         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 391         glMatrixMode( GL_MODELVIEW );
 392         glLoadIdentity();
 393         glTranslatef( 0.0, 0.0, - 5.0 );
 394     }
 395
 396     if( p_sys->p_vout->pf_unlock )
 397     {
 398         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 399     }
 400
 401     return 0;
 402 }
 403
 404 /*****************************************************************************
 405  * End: terminate GLX video thread output method
 406  *****************************************************************************/
 407 static void End( vout_thread_t *p_vout )
 408 {
 409     vout_sys_t *p_sys = p_vout->p_sys;
 410
 411     if( p_sys->p_vout->pf_lock &&
 412         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 413     {
 414         msg_Warn( p_vout, "could not lock OpenGL provider" );
 415         return;
 416     }
 417
 418     glFinish();
 419     glFlush();
 420
 421     if( p_sys->p_vout->pf_unlock )
 422     {
 423         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 424     }
 425 }
 426
 427 /*****************************************************************************
 428  * Destroy: destroy GLX video thread output method
 429  *****************************************************************************
 430  * Terminate an output method created by CreateVout
 431  *****************************************************************************/
 432 static void DestroyVout( vlc_object_t *p_this )
 433 {
 434     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 435     vout_sys_t *p_sys = p_vout->p_sys;
 436
 437     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 438     vlc_object_detach( p_sys->p_vout );
 439     vlc_object_destroy( p_sys->p_vout );
 440
 441     /* Free the texture buffer*/
 442     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 443     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 444
 445     free( p_sys );
 446 }
 447
 448 /*****************************************************************************
 449  * Manage: handle Sys events
 450  *****************************************************************************
 451  * This function should be called regularly by video output thread. It returns
 452  * a non null value if an error occurred.
 453  *****************************************************************************/
 454 static int Manage( vout_thread_t *p_vout )
 455 {
 456     vout_sys_t *p_sys = p_vout->p_sys;
 457     int i_ret, i_fullscreen_change;
 458
 459     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 460
 461     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 462         p_vout->fmt_in.i_x_offset;
 463     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 464         p_vout->fmt_in.i_y_offset;
 465     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 466         p_vout->fmt_in.i_visible_width;
 467     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 468         p_vout->fmt_in.i_visible_height;
 469
 470     p_sys->p_vout->i_changes = p_vout->i_changes;
 471     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 472     p_vout->i_changes = p_sys->p_vout->i_changes;
 473
 474 #ifdef SYS_DARWIN
 475     if( p_sys->p_vout->pf_lock &&
 476         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 477     {
 478         msg_Warn( p_vout, "could not lock OpenGL provider" );
 479         return i_ret;
 480     }
 481
 482     /* On OS X, we create the window and the GL view when entering
 483        fullscreen - the textures have to be inited again */
 484     if( i_fullscreen_change )
 485     {
 486         InitTextures( p_vout );
 487
 488         switch( p_sys->i_effect )
 489         {
 490             case OPENGL_EFFECT_CUBE:
 491                 glEnable( GL_CULL_FACE );
 492                 break;
 493
 494             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 495                 glDisable( GL_DEPTH_TEST );
 496                 glEnable( GL_BLEND );
 497                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 498                 break;
 499         }
 500
 501         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 502                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 503         {
 504             /* Set the perpective */
 505             glMatrixMode( GL_PROJECTION );
 506             glLoadIdentity();
 507             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 508             glMatrixMode( GL_MODELVIEW );
 509             glLoadIdentity();
 510             glTranslatef( 0.0, 0.0, - 5.0 );
 511         }
 512     }
 513
 514     if( p_sys->p_vout->pf_unlock )
 515     {
 516         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 517     }
 518 #endif
 519
 520     return i_ret;
 521 }
 522
 523 /*****************************************************************************
 524  * Render: render previously calculated output
 525  *****************************************************************************/
 526 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 527 {
 528     vout_sys_t *p_sys = p_vout->p_sys;
 529
 530     /* On Win32/GLX, we do this the usual way:
 531        + Fill the buffer with new content,
 532        + Reload the texture,
 533        + Use the texture.
 534
 535        On OS X with VRAM or AGP texturing, the order has to be:
 536        + Reload the texture,
 537        + Fill the buffer with new content,
 538        + Use the texture.
 539
 540        (Thanks to gcc from the Arstechnica forums for the tip)
 541
 542        Therefore, we have to use two buffers and textures. On Win32/GLX,
 543        we reload the texture to be displayed and use it right away. On
 544        OS X, we first render, then reload the texture to be used next
 545        time. */
 546
 547     if( p_sys->p_vout->pf_lock &&
 548         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 549     {
 550         msg_Warn( p_vout, "could not lock OpenGL provider" );
 551         return;
 552     }
 553
 554 #ifdef SYS_DARWIN
 555     int i_new_index;
 556     i_new_index = ( p_sys->i_index + 1 ) & 1;
 557
 558
 559     /* Update the texture */
 560     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 561     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 562                      p_vout->fmt_out.i_width,
 563                      p_vout->fmt_out.i_height,
 564                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 565
 566     /* Bind to the previous texture for drawing */
 567     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 568
 569     /* Switch buffers */
 570     p_sys->i_index = i_new_index;
 571     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 572
 573 #else
 574     /* Update the texture */
 575     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 576                      p_vout->fmt_out.i_width,
 577                      p_vout->fmt_out.i_height,
 578                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 579 #endif
 580
 581     if( p_sys->p_vout->pf_unlock )
 582     {
 583         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 584     }
 585 }
 586
 587 /*****************************************************************************
 588  * DisplayVideo: displays previously rendered output
 589  *****************************************************************************/
 590 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 591 {
 592     vout_sys_t *p_sys = p_vout->p_sys;
 593     float f_width, f_height, f_x, f_y;
 594
 595     if( p_sys->p_vout->pf_lock &&
 596         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 597     {
 598         msg_Warn( p_vout, "could not lock OpenGL provider" );
 599         return;
 600     }
 601
 602     /* glTexCoord works differently with GL_TEXTURE_2D and
 603        GL_TEXTURE_RECTANGLE_EXT */
 604 #ifdef SYS_DARWIN
 605     f_x = (float)p_vout->fmt_out.i_x_offset;
 606     f_y = (float)p_vout->fmt_out.i_y_offset;
 607     f_width = (float)p_vout->fmt_out.i_x_offset +
 608               (float)p_vout->fmt_out.i_visible_width;
 609     f_height = (float)p_vout->fmt_out.i_y_offset +
 610                (float)p_vout->fmt_out.i_visible_height;
 611 #else
 612     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 613     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 614     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 615                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 616     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 617                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 618 #endif
 619
 620     /* Why drawing here and not in Render()? Because this way, the
 621        OpenGL providers can call pf_display to force redraw. Currently,
 622        the OS X provider uses it to get a smooth window resizing */
 623
 624     glClear( GL_COLOR_BUFFER_BIT );
 625
 626     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 627     {
 628         glEnable( VLCGL_TARGET );
 629         glBegin( GL_POLYGON );
 630         glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 631         glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 632         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 633         glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 634         glEnd();
 635     }
 636     else
 637     {
 638         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 639
 640         glEnable( VLCGL_TARGET );
 641         glBegin( GL_QUADS );
 642
 643         /* Front */
 644         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, 1.0 );
 645         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 646         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 647         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, 1.0 );
 648
 649         /* Left */
 650         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 651         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 652         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 653         glTexCoord2f( f_width, f_y ); glVertex3f( - 1.0, 1.0, 1.0 );
 654
 655         /* Back */
 656         glTexCoord2f( f_x, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 657         glTexCoord2f( f_x, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 658         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 659         glTexCoord2f( f_width, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 660
 661         /* Right */
 662         glTexCoord2f( f_x, f_y ); glVertex3f( 1.0, 1.0, 1.0 );
 663         glTexCoord2f( f_x, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 664         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 665         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 666
 667         /* Top */
 668         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 669         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 670         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 671         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 672
 673         /* Bottom */
 674         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, - 1.0, 1.0 );
 675         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 676         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 677         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, - 1.0, 1.0 );
 678         glEnd();
 679     }
 680
 681     glDisable( VLCGL_TARGET );
 682
 683     p_sys->p_vout->pf_swap( p_sys->p_vout );
 684
 685     if( p_sys->p_vout->pf_unlock )
 686     {
 687         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 688     }
 689 }
 690
 691 int GetAlignedSize( int i_size )
 692 {
 693     /* Return the nearest power of 2 */
 694     int i_result = 1;
 695     while( i_result < i_size )
 696     {
 697         i_result *= 2;
 698     }
 699     return i_result;
 700 }
 701
 702 /*****************************************************************************
 703  * Control: control facility for the vout
 704  *****************************************************************************/
 705 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 706 {
 707     vout_sys_t *p_sys = p_vout->p_sys;
 708
 709     switch( i_query )
 710     {
 711     case VOUT_SNAPSHOT:
 712         return vout_vaControlDefault( p_vout, i_query, args );
 713
 714     default:
 715         if( p_sys->p_vout->pf_control )
 716             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 717         else
 718             return vout_vaControlDefault( p_vout, i_query, args );
 719     }
 720 }
 721
 722 static int InitTextures( vout_thread_t *p_vout )
 723 {
 724     vout_sys_t *p_sys = p_vout->p_sys;
 725     int i_index;
 726
 727     glDeleteTextures( 2, p_sys->p_textures );
 728     glGenTextures( 2, p_sys->p_textures );
 729
 730     for( i_index = 0; i_index < 2; i_index++ )
 731     {
 732         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 733
 734         /* Set the texture parameters */
 735         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 736
 737         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 738         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 739
 740         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 741         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 742
 743         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 744
 745 #ifdef SYS_DARWIN
 746         /* Tell the driver not to make a copy of the texture but to use
 747            our buffer */
 748         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 749         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 750
 751 #if 0
 752         /* Use VRAM texturing */
 753         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 754                          GL_STORAGE_CACHED_APPLE );
 755 #else
 756         /* Use AGP texturing */
 757         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 758                          GL_STORAGE_SHARED_APPLE );
 759 #endif
 760 #endif
 761
 762         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 763         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 764                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 765                       p_sys->pp_buffer[i_index] );
 766     }
 767
 768     return 0;
 769 }
 770
 771 /*****************************************************************************
 772  * SendEvents: forward mouse and keyboard events to the parent p_vout
 773  *****************************************************************************/
 774 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 775                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 776 {
 777     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 778 }