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 EFFECT_TEXT N_("Select effect")
  98 #define EFFECT_LONGTEXT N_( \
  99     "Allows you to select different visual effects.")
 100
 101 vlc_module_begin();
 102     set_description( _("OpenGL video output") );
 103 #ifdef SYS_DARWIN
 104     set_capability( "video output", 200 );
 105 #else
 106     set_capability( "video output", 20 );
 107 #endif
 108     add_shortcut( "opengl" );
 109     set_callbacks( CreateVout, DestroyVout );
 110
 111     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 112                  EFFECT_LONGTEXT, VLC_TRUE );
 113 vlc_module_end();
 114
 115 /*****************************************************************************
 116  * vout_sys_t: video output method descriptor
 117  *****************************************************************************
 118  * This structure is part of the video output thread descriptor.
 119  * It describes the OpenGL specific properties of the output thread.
 120  *****************************************************************************/
 121 struct vout_sys_t
 122 {
 123     vout_thread_t *p_vout;
 124
 125     uint8_t    *pp_buffer[2];
 126     int         i_index;
 127     int         i_tex_width;
 128     int         i_tex_height;
 129     GLuint      p_textures[2];
 130
 131     int         i_effect;
 132 };
 133
 134 /*****************************************************************************
 135  * CreateVout: This function allocates and initializes the OpenGL vout method.
 136  *****************************************************************************/
 137 static int CreateVout( vlc_object_t *p_this )
 138 {
 139     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 140     vout_sys_t *p_sys;
 141
 142     /* Allocate structure */
 143     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 144     if( p_sys == NULL )
 145     {
 146         msg_Err( p_vout, "out of memory" );
 147         return VLC_EGENERIC;
 148     }
 149
 150     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 151
 152 #ifdef SYS_DARWIN
 153     p_sys->i_tex_width  = p_vout->render.i_width;
 154     p_sys->i_tex_height = p_vout->render.i_height;
 155 #else
 156     /* A texture must have a size aligned on a power of 2 */
 157     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 158     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 159 #endif
 160
 161     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 162              p_sys->i_tex_height );
 163
 164     /* Get window */
 165     p_sys->p_vout =
 166         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 167     if( p_sys->p_vout == NULL )
 168     {
 169         msg_Err( p_vout, "out of memory" );
 170         return VLC_ENOMEM;
 171     }
 172     vlc_object_attach( p_sys->p_vout, p_this );
 173
 174     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 175     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 176     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 177     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 178     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 179     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 180     p_sys->p_vout->b_scale = p_vout->b_scale;
 181     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 182
 183     p_sys->p_vout->p_module =
 184         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 185     if( p_sys->p_vout->p_module == NULL )
 186     {
 187         msg_Warn( p_vout, "No OpenGL provider found" );
 188         vlc_object_detach( p_sys->p_vout );
 189         vlc_object_destroy( p_sys->p_vout );
 190         return VLC_ENOOBJ;
 191     }
 192
 193     p_vout->pf_init = Init;
 194     p_vout->pf_end = End;
 195     p_vout->pf_manage = Manage;
 196     p_vout->pf_render = Render;
 197     p_vout->pf_display = DisplayVideo;
 198     p_vout->pf_control = Control;
 199
 200     /* Forward events from the opengl provider */
 201     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 202     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 203     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 204     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 205     var_Create( p_sys->p_vout, "video-on-top", VLC_VAR_BOOL );
 206
 207     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 208     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 209     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 210     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 211
 212     return VLC_SUCCESS;
 213 }
 214
 215 /*****************************************************************************
 216  * Init: initialize the OpenGL video thread output method
 217  *****************************************************************************/
 218 static int Init( vout_thread_t *p_vout )
 219 {
 220     vout_sys_t *p_sys = p_vout->p_sys;
 221     int i_pixel_pitch;
 222     vlc_value_t val;
 223
 224     p_sys->p_vout->pf_init( p_sys->p_vout );
 225
 226 #ifdef SYS_DARWIN
 227     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 228     p_vout->output.i_rmask = 0x00ff0000;
 229     p_vout->output.i_gmask = 0x0000ff00;
 230     p_vout->output.i_bmask = 0x000000ff;
 231     i_pixel_pitch = 2;
 232 #else
 233 #if VLCGL_RGB_FORMAT == GL_RGB
 234 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 235     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 236     p_vout->output.i_rmask = 0x000000ff;
 237     p_vout->output.i_gmask = 0x0000ff00;
 238     p_vout->output.i_bmask = 0x00ff0000;
 239     i_pixel_pitch = 3;
 240 #   else
 241     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 242     p_vout->output.i_rmask = 0xf800;
 243     p_vout->output.i_gmask = 0x07e0;
 244     p_vout->output.i_bmask = 0x001f;
 245     i_pixel_pitch = 2;
 246 #   endif
 247 #else
 248     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 249     p_vout->output.i_rmask = 0x000000ff;
 250     p_vout->output.i_gmask = 0x0000ff00;
 251     p_vout->output.i_bmask = 0x00ff0000;
 252     i_pixel_pitch = 4;
 253 #endif
 254 #endif
 255
 256     /* Since OpenGL can do rescaling for us, stick to the default
 257      * coordinates and aspect. */
 258     p_vout->output.i_width  = p_vout->render.i_width;
 259     p_vout->output.i_height = p_vout->render.i_height;
 260     p_vout->output.i_aspect = p_vout->render.i_aspect;
 261
 262     /* We know the chroma, allocate one buffer which will be used
 263      * directly by the decoder */
 264     p_sys->pp_buffer[0] =
 265         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 266     if( !p_sys->pp_buffer[0] )
 267     {
 268         msg_Err( p_vout, "Out of memory" );
 269         return -1;
 270     }
 271     p_sys->pp_buffer[1] =
 272         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 273     if( !p_sys->pp_buffer[1] )
 274     {
 275         msg_Err( p_vout, "Out of memory" );
 276         return -1;
 277     }
 278
 279     p_vout->p_picture[0].i_planes = 1;
 280     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 281     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 282     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 283     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 284     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 285         p_vout->p_picture[0].p->i_pixel_pitch;
 286     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 287         p_vout->p_picture[0].p->i_pixel_pitch;
 288
 289     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 290     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 291
 292     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 293
 294     I_OUTPUTPICTURES = 1;
 295
 296     InitTextures( p_vout );
 297
 298     glDisable(GL_BLEND);
 299     glDisable(GL_DEPTH_TEST);
 300     glDepthMask(GL_FALSE);
 301     glDisable(GL_CULL_FACE);
 302     glClear( GL_COLOR_BUFFER_BIT );
 303
 304     /* Check if the user asked for useless visual effects */
 305     var_Get( p_vout, "opengl-effect", &val );
 306     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 307     {
 308         p_sys->i_effect = OPENGL_EFFECT_NONE;
 309     }
 310     else if( !strcmp( val.psz_string, "cube" ) )
 311     {
 312         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 313
 314         glEnable( GL_CULL_FACE);
 315         //glEnable( GL_DEPTH_TEST );
 316     }
 317     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 318     {
 319         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 320
 321         glDisable( GL_DEPTH_TEST );
 322         glEnable( GL_BLEND );
 323         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 324     }
 325     else
 326     {
 327         msg_Warn( p_vout, "no valid opengl effect provided, using "
 328                   "\"none\"" );
 329         p_sys->i_effect = OPENGL_EFFECT_NONE;
 330     }
 331     if( val.psz_string ) free( val.psz_string );
 332
 333     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 334                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 335     {
 336         /* Set the perpective */
 337         glMatrixMode( GL_PROJECTION );
 338         glLoadIdentity();
 339         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 340         glMatrixMode( GL_MODELVIEW );
 341         glLoadIdentity();
 342         glTranslatef( 0.0, 0.0, - 5.0 );
 343     }
 344
 345     return 0;
 346 }
 347
 348 /*****************************************************************************
 349  * End: terminate GLX video thread output method
 350  *****************************************************************************/
 351 static void End( vout_thread_t *p_vout )
 352 {
 353     glFinish();
 354     glFlush();
 355 }
 356
 357 /*****************************************************************************
 358  * Destroy: destroy GLX video thread output method
 359  *****************************************************************************
 360  * Terminate an output method created by CreateVout
 361  *****************************************************************************/
 362 static void DestroyVout( vlc_object_t *p_this )
 363 {
 364     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 365     vout_sys_t *p_sys = p_vout->p_sys;
 366
 367     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 368     vlc_object_detach( p_sys->p_vout );
 369     vlc_object_destroy( p_sys->p_vout );
 370
 371     /* Free the texture buffer*/
 372     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 373     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 374
 375     free( p_sys );
 376 }
 377
 378 /*****************************************************************************
 379  * Manage: handle Sys events
 380  *****************************************************************************
 381  * This function should be called regularly by video output thread. It returns
 382  * a non null value if an error occurred.
 383  *****************************************************************************/
 384 static int Manage( vout_thread_t *p_vout )
 385 {
 386     vout_sys_t *p_sys = p_vout->p_sys;
 387     int i_ret, i_fullscreen_change;
 388
 389     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 390
 391     p_sys->p_vout->i_changes = p_vout->i_changes;
 392     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 393     p_vout->i_changes = p_sys->p_vout->i_changes;
 394
 395 #ifdef SYS_DARWIN
 396     /* On OS X, we create the window and the GL view when entering
 397        fullscreen - the textures have to be inited again */
 398     if( i_fullscreen_change )
 399     {
 400         InitTextures( p_vout );
 401
 402         switch( p_sys->i_effect )
 403         {
 404             case OPENGL_EFFECT_CUBE:
 405                 glEnable( GL_CULL_FACE );
 406                 break;
 407
 408             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 409                 glDisable( GL_DEPTH_TEST );
 410                 glEnable( GL_BLEND );
 411                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 412                 break;
 413         }
 414
 415         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 416                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 417         {
 418             /* Set the perpective */
 419             glMatrixMode( GL_PROJECTION );
 420             glLoadIdentity();
 421             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 422             glMatrixMode( GL_MODELVIEW );
 423             glLoadIdentity();
 424             glTranslatef( 0.0, 0.0, - 5.0 );
 425         }
 426     }
 427 #endif
 428
 429     return i_ret;
 430 }
 431
 432 /*****************************************************************************
 433  * Render: render previously calculated output
 434  *****************************************************************************/
 435 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 436 {
 437     vout_sys_t *p_sys = p_vout->p_sys;
 438     float f_width, f_height;
 439
 440     /* glTexCoord works differently with GL_TEXTURE_2D and
 441        GL_TEXTURE_RECTANGLE_EXT */
 442 #ifdef SYS_DARWIN
 443     f_width = (float)p_vout->output.i_width;
 444     f_height = (float)p_vout->output.i_height;
 445 #else
 446     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 447     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 448 #endif
 449
 450     glClear( GL_COLOR_BUFFER_BIT );
 451
 452     /* On Win32/GLX, we do this the usual way:
 453        + Fill the buffer with new content,
 454        + Reload the texture,
 455        + Use the texture.
 456
 457        On OS X with VRAM or AGP texturing, the order has to be:
 458        + Reload the texture,
 459        + Fill the buffer with new content,
 460        + Use the texture.
 461
 462        (Thanks to gcc from the Arstechnica forums for the tip)
 463
 464        Therefore, we have to use two buffers and textures. On Win32/GLX,
 465        we reload the texture to be displayed and use it right away. On
 466        OS X, we first render, then reload the texture to be used next
 467        time. */
 468
 469 #ifdef SYS_DARWIN
 470     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 471 #else
 472
 473     /* Update the texture */
 474     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 475                      p_vout->render.i_width, p_vout->render.i_height,
 476                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 477 #endif
 478
 479     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 480     {
 481         glEnable( VLCGL_TARGET );
 482         glBegin( GL_POLYGON );
 483         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 484         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 485         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 486         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 487         glEnd();
 488     }
 489     else
 490     {
 491         glRotatef( 1.0, 0.3, 0.5, 0.7 );
 492
 493         glEnable( VLCGL_TARGET );
 494         glBegin( GL_QUADS );
 495
 496         /* Front */
 497         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 498         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 499         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 500         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 501
 502         /* Left */
 503         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 504         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 505         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 506         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 507
 508         /* Back */
 509         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 510         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 511         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 512         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 513
 514         /* Right */
 515         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 516         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 517         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 518         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 519
 520         /* Top */
 521         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 522         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 523         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 524         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 525
 526         /* Bottom */
 527         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 528         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 529         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 530         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 531         glEnd();
 532     }
 533
 534     glDisable( VLCGL_TARGET );
 535
 536 #ifdef SYS_DARWIN
 537     /* Switch buffers */
 538     p_sys->i_index = ( p_sys->i_index + 1 ) & 1;
 539     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 540
 541     /* Update the texture */
 542     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 543     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 544                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 545                      p_sys->pp_buffer[p_sys->i_index] );
 546 #endif
 547 }
 548
 549 /*****************************************************************************
 550  * DisplayVideo: displays previously rendered output
 551  *****************************************************************************/
 552 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 553 {
 554     vout_sys_t *p_sys = p_vout->p_sys;
 555     p_sys->p_vout->pf_swap( p_sys->p_vout );
 556 }
 557
 558 int GetAlignedSize( int i_size )
 559 {
 560     /* Return the nearest power of 2 */
 561     int i_result = 1;
 562     while( i_result < i_size )
 563     {
 564         i_result *= 2;
 565     }
 566     return i_result;
 567 }
 568
 569 /*****************************************************************************
 570  * Control: control facility for the vout
 571  *****************************************************************************/
 572 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 573 {
 574     vout_sys_t *p_sys = p_vout->p_sys;
 575
 576     if( p_sys->p_vout->pf_control )
 577         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 578     else
 579         return vout_vaControlDefault( p_vout, i_query, args );
 580 }
 581
 582 static int InitTextures( vout_thread_t *p_vout )
 583 {
 584     vout_sys_t *p_sys = p_vout->p_sys;
 585     int i_index;
 586
 587     glDeleteTextures( 2, p_sys->p_textures );
 588     glGenTextures( 2, p_sys->p_textures );
 589
 590     for( i_index = 0; i_index < 2; i_index++ )
 591     {
 592         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 593
 594         /* Set the texture parameters */
 595         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 596
 597         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 598         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 599
 600         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP );
 601         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP );
 602
 603         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 604
 605 #ifdef SYS_DARWIN
 606         /* Tell the driver not to make a copy of the texture but to use
 607            our buffer */
 608         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 609         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 610
 611 #if 0
 612         /* Use VRAM texturing */
 613         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 614                          GL_STORAGE_CACHED_APPLE );
 615 #else
 616         /* Use AGP texturing */
 617         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 618                          GL_STORAGE_SHARED_APPLE );
 619 #endif
 620 #endif
 621
 622         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 623         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 624                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 625                       p_sys->pp_buffer[i_index] );
 626     }
 627
 628     return 0;
 629 }
 630
 631 /*****************************************************************************
 632  * SendEvents: forward mouse and keyboard events to the parent p_vout
 633  *****************************************************************************/
 634 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 635                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 636 {
 637     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 638 }