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", 200 );
 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     p_sys->i_index = 0;
 166 #ifdef SYS_DARWIN
 167     p_sys->i_tex_width  = p_vout->render.i_width;
 168     p_sys->i_tex_height = p_vout->render.i_height;
 169 #else
 170     /* A texture must have a size aligned on a power of 2 */
 171     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 172     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 173 #endif
 174
 175     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 176              p_sys->i_tex_height );
 177
 178     /* Get window */
 179     p_sys->p_vout =
 180         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 181     if( p_sys->p_vout == NULL )
 182     {
 183         msg_Err( p_vout, "out of memory" );
 184         return VLC_ENOMEM;
 185     }
 186     vlc_object_attach( p_sys->p_vout, p_this );
 187
 188     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 189     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 190     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 191     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 192     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 193     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 194     p_sys->p_vout->b_scale = p_vout->b_scale;
 195     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 196
 197     p_sys->p_vout->p_module =
 198         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 199     if( p_sys->p_vout->p_module == NULL )
 200     {
 201         msg_Warn( p_vout, "No OpenGL provider found" );
 202         vlc_object_detach( p_sys->p_vout );
 203         vlc_object_destroy( p_sys->p_vout );
 204         return VLC_ENOOBJ;
 205     }
 206
 207     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 208
 209     p_vout->pf_init = Init;
 210     p_vout->pf_end = End;
 211     p_vout->pf_manage = Manage;
 212     p_vout->pf_render = Render;
 213     p_vout->pf_display = DisplayVideo;
 214     p_vout->pf_control = Control;
 215
 216     /* Forward events from the opengl provider */
 217     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 218     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 219     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 220     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 221     var_Create( p_sys->p_vout, "video-on-top",
 222                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 223
 224     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 225     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 226     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 227     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 228
 229     return VLC_SUCCESS;
 230 }
 231
 232 /*****************************************************************************
 233  * Init: initialize the OpenGL video thread output method
 234  *****************************************************************************/
 235 static int Init( vout_thread_t *p_vout )
 236 {
 237     vout_sys_t *p_sys = p_vout->p_sys;
 238     int i_pixel_pitch;
 239     vlc_value_t val;
 240
 241     p_sys->p_vout->pf_init( p_sys->p_vout );
 242
 243 #ifdef SYS_DARWIN
 244     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 245     p_vout->output.i_rmask = 0x00ff0000;
 246     p_vout->output.i_gmask = 0x0000ff00;
 247     p_vout->output.i_bmask = 0x000000ff;
 248     i_pixel_pitch = 2;
 249 #else
 250 #if VLCGL_RGB_FORMAT == GL_RGB
 251 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 252     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 253     p_vout->output.i_rmask = 0x000000ff;
 254     p_vout->output.i_gmask = 0x0000ff00;
 255     p_vout->output.i_bmask = 0x00ff0000;
 256     i_pixel_pitch = 3;
 257 #   else
 258     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 259     p_vout->output.i_rmask = 0xf800;
 260     p_vout->output.i_gmask = 0x07e0;
 261     p_vout->output.i_bmask = 0x001f;
 262     i_pixel_pitch = 2;
 263 #   endif
 264 #else
 265     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 266     p_vout->output.i_rmask = 0x000000ff;
 267     p_vout->output.i_gmask = 0x0000ff00;
 268     p_vout->output.i_bmask = 0x00ff0000;
 269     i_pixel_pitch = 4;
 270 #endif
 271 #endif
 272
 273     /* Since OpenGL can do rescaling for us, stick to the default
 274      * coordinates and aspect. */
 275     p_vout->output.i_width  = p_vout->render.i_width;
 276     p_vout->output.i_height = p_vout->render.i_height;
 277     p_vout->output.i_aspect = p_vout->render.i_aspect;
 278
 279     /* We know the chroma, allocate one buffer which will be used
 280      * directly by the decoder */
 281     p_sys->pp_buffer[0] =
 282         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 283     if( !p_sys->pp_buffer[0] )
 284     {
 285         msg_Err( p_vout, "Out of memory" );
 286         return -1;
 287     }
 288     p_sys->pp_buffer[1] =
 289         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 290     if( !p_sys->pp_buffer[1] )
 291     {
 292         msg_Err( p_vout, "Out of memory" );
 293         return -1;
 294     }
 295
 296     p_vout->p_picture[0].i_planes = 1;
 297     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 298     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 299     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 300     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 301     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 302         p_vout->p_picture[0].p->i_pixel_pitch;
 303     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 304         p_vout->p_picture[0].p->i_pixel_pitch;
 305
 306     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 307     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 308
 309     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 310
 311     I_OUTPUTPICTURES = 1;
 312
 313     InitTextures( p_vout );
 314
 315     glDisable(GL_BLEND);
 316     glDisable(GL_DEPTH_TEST);
 317     glDepthMask(GL_FALSE);
 318     glDisable(GL_CULL_FACE);
 319     glClear( GL_COLOR_BUFFER_BIT );
 320
 321     /* Check if the user asked for useless visual effects */
 322     var_Get( p_vout, "opengl-effect", &val );
 323     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 324     {
 325         p_sys->i_effect = OPENGL_EFFECT_NONE;
 326     }
 327     else if( !strcmp( val.psz_string, "cube" ) )
 328     {
 329         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 330
 331         glEnable( GL_CULL_FACE);
 332         //glEnable( GL_DEPTH_TEST );
 333     }
 334     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 335     {
 336         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 337
 338         glDisable( GL_DEPTH_TEST );
 339         glEnable( GL_BLEND );
 340         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 341     }
 342     else
 343     {
 344         msg_Warn( p_vout, "no valid opengl effect provided, using "
 345                   "\"none\"" );
 346         p_sys->i_effect = OPENGL_EFFECT_NONE;
 347     }
 348     if( val.psz_string ) free( val.psz_string );
 349
 350     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 351                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 352     {
 353         /* Set the perpective */
 354         glMatrixMode( GL_PROJECTION );
 355         glLoadIdentity();
 356         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 357         glMatrixMode( GL_MODELVIEW );
 358         glLoadIdentity();
 359         glTranslatef( 0.0, 0.0, - 5.0 );
 360     }
 361
 362     return 0;
 363 }
 364
 365 /*****************************************************************************
 366  * End: terminate GLX video thread output method
 367  *****************************************************************************/
 368 static void End( vout_thread_t *p_vout )
 369 {
 370     glFinish();
 371     glFlush();
 372 }
 373
 374 /*****************************************************************************
 375  * Destroy: destroy GLX video thread output method
 376  *****************************************************************************
 377  * Terminate an output method created by CreateVout
 378  *****************************************************************************/
 379 static void DestroyVout( vlc_object_t *p_this )
 380 {
 381     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 382     vout_sys_t *p_sys = p_vout->p_sys;
 383
 384     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 385     vlc_object_detach( p_sys->p_vout );
 386     vlc_object_destroy( p_sys->p_vout );
 387
 388     /* Free the texture buffer*/
 389     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 390     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 391
 392     free( p_sys );
 393 }
 394
 395 /*****************************************************************************
 396  * Manage: handle Sys events
 397  *****************************************************************************
 398  * This function should be called regularly by video output thread. It returns
 399  * a non null value if an error occurred.
 400  *****************************************************************************/
 401 static int Manage( vout_thread_t *p_vout )
 402 {
 403     vout_sys_t *p_sys = p_vout->p_sys;
 404     int i_ret, i_fullscreen_change;
 405
 406     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 407
 408     p_sys->p_vout->i_changes = p_vout->i_changes;
 409     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 410     p_vout->i_changes = p_sys->p_vout->i_changes;
 411
 412 #ifdef SYS_DARWIN
 413     /* On OS X, we create the window and the GL view when entering
 414        fullscreen - the textures have to be inited again */
 415     if( i_fullscreen_change )
 416     {
 417         InitTextures( p_vout );
 418
 419         switch( p_sys->i_effect )
 420         {
 421             case OPENGL_EFFECT_CUBE:
 422                 glEnable( GL_CULL_FACE );
 423                 break;
 424
 425             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 426                 glDisable( GL_DEPTH_TEST );
 427                 glEnable( GL_BLEND );
 428                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 429                 break;
 430         }
 431
 432         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 433                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 434         {
 435             /* Set the perpective */
 436             glMatrixMode( GL_PROJECTION );
 437             glLoadIdentity();
 438             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 439             glMatrixMode( GL_MODELVIEW );
 440             glLoadIdentity();
 441             glTranslatef( 0.0, 0.0, - 5.0 );
 442         }
 443     }
 444 #endif
 445
 446     return i_ret;
 447 }
 448
 449 /*****************************************************************************
 450  * Render: render previously calculated output
 451  *****************************************************************************/
 452 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 453 {
 454     vout_sys_t *p_sys = p_vout->p_sys;
 455
 456     /* On Win32/GLX, we do this the usual way:
 457        + Fill the buffer with new content,
 458        + Reload the texture,
 459        + Use the texture.
 460
 461        On OS X with VRAM or AGP texturing, the order has to be:
 462        + Reload the texture,
 463        + Fill the buffer with new content,
 464        + Use the texture.
 465
 466        (Thanks to gcc from the Arstechnica forums for the tip)
 467
 468        Therefore, we have to use two buffers and textures. On Win32/GLX,
 469        we reload the texture to be displayed and use it right away. On
 470        OS X, we first render, then reload the texture to be used next
 471        time. */
 472
 473 #ifdef SYS_DARWIN
 474     int i_new_index;
 475     i_new_index = ( p_sys->i_index + 1 ) & 1;
 476
 477     /* Update the texture */
 478     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 479     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 480                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 481                      p_sys->pp_buffer[i_new_index] );
 482
 483     /* Bind to the previous texture for drawing */
 484     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 485
 486     /* Switch buffers */
 487     p_sys->i_index = i_new_index;
 488     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 489
 490 #else
 491     /* Update the texture */
 492     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 493                      p_vout->render.i_width, p_vout->render.i_height,
 494                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 495 #endif
 496 }
 497
 498 /*****************************************************************************
 499  * DisplayVideo: displays previously rendered output
 500  *****************************************************************************/
 501 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 502 {
 503     vout_sys_t *p_sys = p_vout->p_sys;
 504     float f_width, f_height;
 505
 506     /* glTexCoord works differently with GL_TEXTURE_2D and
 507        GL_TEXTURE_RECTANGLE_EXT */
 508 #ifdef SYS_DARWIN
 509     f_width = (float)p_vout->output.i_width;
 510     f_height = (float)p_vout->output.i_height;
 511 #else
 512     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 513     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 514 #endif
 515
 516     /* Why drawing here and not in Render()? Because this way, the
 517        OpenGL providers can call pf_display to force redraw. Currently,
 518        the OS X provider uses it to get a smooth window resizing */
 519
 520     glClear( GL_COLOR_BUFFER_BIT );
 521
 522     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 523     {
 524         glEnable( VLCGL_TARGET );
 525         glBegin( GL_POLYGON );
 526         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 527         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 528         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 529         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 530         glEnd();
 531     }
 532     else
 533     {
 534         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 535
 536         glEnable( VLCGL_TARGET );
 537         glBegin( GL_QUADS );
 538
 539         /* Front */
 540         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 541         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 542         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 543         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 544
 545         /* Left */
 546         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 547         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 548         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 549         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 550
 551         /* Back */
 552         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 553         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 554         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 555         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 556
 557         /* Right */
 558         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 559         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 560         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 561         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 562
 563         /* Top */
 564         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 565         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 566         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 567         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 568
 569         /* Bottom */
 570         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 571         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 572         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 573         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 574         glEnd();
 575     }
 576
 577     glDisable( VLCGL_TARGET );
 578
 579     p_sys->p_vout->pf_swap( p_sys->p_vout );
 580 }
 581
 582 int GetAlignedSize( int i_size )
 583 {
 584     /* Return the nearest power of 2 */
 585     int i_result = 1;
 586     while( i_result < i_size )
 587     {
 588         i_result *= 2;
 589     }
 590     return i_result;
 591 }
 592
 593 /*****************************************************************************
 594  * Control: control facility for the vout
 595  *****************************************************************************/
 596 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 597 {
 598     vout_sys_t *p_sys = p_vout->p_sys;
 599
 600     if( p_sys->p_vout->pf_control )
 601         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 602     else
 603         return vout_vaControlDefault( p_vout, i_query, args );
 604 }
 605
 606 static int InitTextures( vout_thread_t *p_vout )
 607 {
 608     vout_sys_t *p_sys = p_vout->p_sys;
 609     int i_index;
 610
 611     glDeleteTextures( 2, p_sys->p_textures );
 612     glGenTextures( 2, p_sys->p_textures );
 613
 614     for( i_index = 0; i_index < 2; i_index++ )
 615     {
 616         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 617
 618         /* Set the texture parameters */
 619         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 620
 621         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 622         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 623
 624         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP );
 625         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP );
 626
 627         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 628
 629 #ifdef SYS_DARWIN
 630         /* Tell the driver not to make a copy of the texture but to use
 631            our buffer */
 632         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 633         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 634
 635 #if 0
 636         /* Use VRAM texturing */
 637         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 638                          GL_STORAGE_CACHED_APPLE );
 639 #else
 640         /* Use AGP texturing */
 641         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 642                          GL_STORAGE_SHARED_APPLE );
 643 #endif
 644 #endif
 645
 646         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 647         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 648                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 649                       p_sys->pp_buffer[i_index] );
 650     }
 651
 652     return 0;
 653 }
 654
 655 /*****************************************************************************
 656  * SendEvents: forward mouse and keyboard events to the parent p_vout
 657  *****************************************************************************/
 658 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 659                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 660 {
 661     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 662 }