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