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