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 #define SPEED_LONGTEXT N_( "If the OpenGL cube effect is enabled, this " \
 100                            "controls its rotation speed." )
 101
 102 #define EFFECT_TEXT N_("Select effect")
 103 #define EFFECT_LONGTEXT N_( \
 104     "Allows you to select different visual effects.")
 105
 106 static char *ppsz_effects[] = {
 107         "none", "cube", "transparent-cube" };
 108 static char *ppsz_effects_text[] = {
 109         N_("None"), N_("Cube"), N_("Transparent Cube") };
 110
 111 vlc_module_begin();
 112     set_shortname( "OpenGL" );
 113     set_category( CAT_VIDEO );
 114     set_subcategory( SUBCAT_VIDEO_VOUT );
 115     set_description( _("OpenGL video output") );
 116 #ifdef SYS_DARWIN
 117     set_capability( "video output", 200 );
 118 #else
 119     set_capability( "video output", 20 );
 120 #endif
 121     add_shortcut( "opengl" );
 122     add_float( "opengl-cube-speed", 2.0, NULL, SPEED_TEXT,
 123                     SPEED_LONGTEXT, VLC_TRUE );
 124     set_callbacks( CreateVout, DestroyVout );
 125     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 126                  EFFECT_LONGTEXT, VLC_FALSE );
 127         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 128 vlc_module_end();
 129
 130 /*****************************************************************************
 131  * vout_sys_t: video output method descriptor
 132  *****************************************************************************
 133  * This structure is part of the video output thread descriptor.
 134  * It describes the OpenGL specific properties of the output thread.
 135  *****************************************************************************/
 136 struct vout_sys_t
 137 {
 138     vout_thread_t *p_vout;
 139
 140     uint8_t    *pp_buffer[2];
 141     int         i_index;
 142     int         i_tex_width;
 143     int         i_tex_height;
 144     GLuint      p_textures[2];
 145
 146     int         i_effect;
 147
 148     float       f_speed;
 149 };
 150
 151 /*****************************************************************************
 152  * CreateVout: This function allocates and initializes the OpenGL vout method.
 153  *****************************************************************************/
 154 static int CreateVout( vlc_object_t *p_this )
 155 {
 156     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 157     vout_sys_t *p_sys;
 158
 159     /* Allocate structure */
 160     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 161     if( p_sys == NULL )
 162     {
 163         msg_Err( p_vout, "out of memory" );
 164         return VLC_EGENERIC;
 165     }
 166
 167     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 168
 169     p_sys->i_index = 0;
 170 #ifdef SYS_DARWIN
 171     p_sys->i_tex_width  = p_vout->render.i_width;
 172     p_sys->i_tex_height = p_vout->render.i_height;
 173 #else
 174     /* A texture must have a size aligned on a power of 2 */
 175     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 176     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 177 #endif
 178
 179     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 180              p_sys->i_tex_height );
 181
 182     /* Get window */
 183     p_sys->p_vout =
 184         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 185     if( p_sys->p_vout == NULL )
 186     {
 187         msg_Err( p_vout, "out of memory" );
 188         return VLC_ENOMEM;
 189     }
 190     vlc_object_attach( p_sys->p_vout, p_this );
 191
 192     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 193     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 194     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 195     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 196     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 197     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 198     p_sys->p_vout->b_scale = p_vout->b_scale;
 199     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 200
 201     p_sys->p_vout->p_module =
 202         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 203     if( p_sys->p_vout->p_module == NULL )
 204     {
 205         msg_Warn( p_vout, "No OpenGL provider found" );
 206         vlc_object_detach( p_sys->p_vout );
 207         vlc_object_destroy( p_sys->p_vout );
 208         return VLC_ENOOBJ;
 209     }
 210
 211     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 212
 213     p_vout->pf_init = Init;
 214     p_vout->pf_end = End;
 215     p_vout->pf_manage = Manage;
 216     p_vout->pf_render = Render;
 217     p_vout->pf_display = DisplayVideo;
 218     p_vout->pf_control = Control;
 219
 220     /* Forward events from the opengl provider */
 221     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 222     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 223     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 224     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 225     var_Create( p_sys->p_vout, "video-on-top",
 226                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 227
 228     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 229     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 230     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 231     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 232
 233     return VLC_SUCCESS;
 234 }
 235
 236 /*****************************************************************************
 237  * Init: initialize the OpenGL video thread output method
 238  *****************************************************************************/
 239 static int Init( vout_thread_t *p_vout )
 240 {
 241     vout_sys_t *p_sys = p_vout->p_sys;
 242     int i_pixel_pitch;
 243     vlc_value_t val;
 244
 245     p_sys->p_vout->pf_init( p_sys->p_vout );
 246
 247 #ifdef SYS_DARWIN
 248     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 249     p_vout->output.i_rmask = 0x00ff0000;
 250     p_vout->output.i_gmask = 0x0000ff00;
 251     p_vout->output.i_bmask = 0x000000ff;
 252     i_pixel_pitch = 2;
 253 #else
 254 #if VLCGL_RGB_FORMAT == GL_RGB
 255 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 256     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 257     p_vout->output.i_rmask = 0x000000ff;
 258     p_vout->output.i_gmask = 0x0000ff00;
 259     p_vout->output.i_bmask = 0x00ff0000;
 260     i_pixel_pitch = 3;
 261 #   else
 262     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 263     p_vout->output.i_rmask = 0xf800;
 264     p_vout->output.i_gmask = 0x07e0;
 265     p_vout->output.i_bmask = 0x001f;
 266     i_pixel_pitch = 2;
 267 #   endif
 268 #else
 269     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 270     p_vout->output.i_rmask = 0x000000ff;
 271     p_vout->output.i_gmask = 0x0000ff00;
 272     p_vout->output.i_bmask = 0x00ff0000;
 273     i_pixel_pitch = 4;
 274 #endif
 275 #endif
 276
 277     /* Since OpenGL can do rescaling for us, stick to the default
 278      * coordinates and aspect. */
 279     p_vout->output.i_width  = p_vout->render.i_width;
 280     p_vout->output.i_height = p_vout->render.i_height;
 281     p_vout->output.i_aspect = p_vout->render.i_aspect;
 282
 283     /* We know the chroma, allocate one buffer which will be used
 284      * directly by the decoder */
 285     p_sys->pp_buffer[0] =
 286         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 287     if( !p_sys->pp_buffer[0] )
 288     {
 289         msg_Err( p_vout, "Out of memory" );
 290         return -1;
 291     }
 292     p_sys->pp_buffer[1] =
 293         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 294     if( !p_sys->pp_buffer[1] )
 295     {
 296         msg_Err( p_vout, "Out of memory" );
 297         return -1;
 298     }
 299
 300     p_vout->p_picture[0].i_planes = 1;
 301     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 302     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 303     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 304     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 305     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 306         p_vout->p_picture[0].p->i_pixel_pitch;
 307     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 308         p_vout->p_picture[0].p->i_pixel_pitch;
 309
 310     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 311     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 312
 313     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 314
 315     I_OUTPUTPICTURES = 1;
 316
 317     if( p_sys->p_vout->pf_lock &&
 318         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 319     {
 320         msg_Warn( p_vout, "could not lock OpenGL provider" );
 321         return 0;
 322     }
 323
 324     InitTextures( p_vout );
 325
 326     glDisable(GL_BLEND);
 327     glDisable(GL_DEPTH_TEST);
 328     glDepthMask(GL_FALSE);
 329     glDisable(GL_CULL_FACE);
 330     glClear( GL_COLOR_BUFFER_BIT );
 331
 332     /* Check if the user asked for useless visual effects */
 333     var_Get( p_vout, "opengl-effect", &val );
 334     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 335     {
 336         p_sys->i_effect = OPENGL_EFFECT_NONE;
 337     }
 338     else if( !strcmp( val.psz_string, "cube" ) )
 339     {
 340         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 341
 342         glEnable( GL_CULL_FACE);
 343         //glEnable( GL_DEPTH_TEST );
 344     }
 345     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 346     {
 347         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 348
 349         glDisable( GL_DEPTH_TEST );
 350         glEnable( GL_BLEND );
 351         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 352     }
 353     else
 354     {
 355         msg_Warn( p_vout, "no valid opengl effect provided, using "
 356                   "\"none\"" );
 357         p_sys->i_effect = OPENGL_EFFECT_NONE;
 358     }
 359     if( val.psz_string ) free( val.psz_string );
 360
 361     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 362                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 363     {
 364         /* Set the perpective */
 365         glMatrixMode( GL_PROJECTION );
 366         glLoadIdentity();
 367         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 368         glMatrixMode( GL_MODELVIEW );
 369         glLoadIdentity();
 370         glTranslatef( 0.0, 0.0, - 5.0 );
 371     }
 372
 373     if( p_sys->p_vout->pf_unlock )
 374     {
 375         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 376     }
 377
 378     return 0;
 379 }
 380
 381 /*****************************************************************************
 382  * End: terminate GLX video thread output method
 383  *****************************************************************************/
 384 static void End( vout_thread_t *p_vout )
 385 {
 386     vout_sys_t *p_sys = p_vout->p_sys;
 387
 388     if( p_sys->p_vout->pf_lock &&
 389         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 390     {
 391         msg_Warn( p_vout, "could not lock OpenGL provider" );
 392         return;
 393     }
 394
 395     glFinish();
 396     glFlush();
 397
 398     if( p_sys->p_vout->pf_unlock )
 399     {
 400         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 401     }
 402 }
 403
 404 /*****************************************************************************
 405  * Destroy: destroy GLX video thread output method
 406  *****************************************************************************
 407  * Terminate an output method created by CreateVout
 408  *****************************************************************************/
 409 static void DestroyVout( vlc_object_t *p_this )
 410 {
 411     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 412     vout_sys_t *p_sys = p_vout->p_sys;
 413
 414     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 415     vlc_object_detach( p_sys->p_vout );
 416     vlc_object_destroy( p_sys->p_vout );
 417
 418     /* Free the texture buffer*/
 419     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 420     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 421
 422     free( p_sys );
 423 }
 424
 425 /*****************************************************************************
 426  * Manage: handle Sys events
 427  *****************************************************************************
 428  * This function should be called regularly by video output thread. It returns
 429  * a non null value if an error occurred.
 430  *****************************************************************************/
 431 static int Manage( vout_thread_t *p_vout )
 432 {
 433     vout_sys_t *p_sys = p_vout->p_sys;
 434     int i_ret, i_fullscreen_change;
 435
 436     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 437
 438     p_sys->p_vout->i_changes = p_vout->i_changes;
 439     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 440     p_vout->i_changes = p_sys->p_vout->i_changes;
 441
 442 #ifdef SYS_DARWIN
 443     if( p_sys->p_vout->pf_lock &&
 444         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 445     {
 446         msg_Warn( p_vout, "could not lock OpenGL provider" );
 447         return i_ret;
 448     }
 449
 450     /* On OS X, we create the window and the GL view when entering
 451        fullscreen - the textures have to be inited again */
 452     if( i_fullscreen_change )
 453     {
 454         InitTextures( p_vout );
 455
 456         switch( p_sys->i_effect )
 457         {
 458             case OPENGL_EFFECT_CUBE:
 459                 glEnable( GL_CULL_FACE );
 460                 break;
 461
 462             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 463                 glDisable( GL_DEPTH_TEST );
 464                 glEnable( GL_BLEND );
 465                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 466                 break;
 467         }
 468
 469         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 470                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 471         {
 472             /* Set the perpective */
 473             glMatrixMode( GL_PROJECTION );
 474             glLoadIdentity();
 475             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 476             glMatrixMode( GL_MODELVIEW );
 477             glLoadIdentity();
 478             glTranslatef( 0.0, 0.0, - 5.0 );
 479         }
 480     }
 481
 482     if( p_sys->p_vout->pf_unlock )
 483     {
 484         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 485     }
 486 #endif
 487
 488     return i_ret;
 489 }
 490
 491 /*****************************************************************************
 492  * Render: render previously calculated output
 493  *****************************************************************************/
 494 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 495 {
 496     vout_sys_t *p_sys = p_vout->p_sys;
 497
 498     /* On Win32/GLX, we do this the usual way:
 499        + Fill the buffer with new content,
 500        + Reload the texture,
 501        + Use the texture.
 502
 503        On OS X with VRAM or AGP texturing, the order has to be:
 504        + Reload the texture,
 505        + Fill the buffer with new content,
 506        + Use the texture.
 507
 508        (Thanks to gcc from the Arstechnica forums for the tip)
 509
 510        Therefore, we have to use two buffers and textures. On Win32/GLX,
 511        we reload the texture to be displayed and use it right away. On
 512        OS X, we first render, then reload the texture to be used next
 513        time. */
 514
 515     if( p_sys->p_vout->pf_lock &&
 516         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 517     {
 518         msg_Warn( p_vout, "could not lock OpenGL provider" );
 519         return;
 520     }
 521
 522 #ifdef SYS_DARWIN
 523     int i_new_index;
 524     i_new_index = ( p_sys->i_index + 1 ) & 1;
 525
 526
 527     /* Update the texture */
 528     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 529     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 530                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 531                      p_sys->pp_buffer[i_new_index] );
 532
 533     /* Bind to the previous texture for drawing */
 534     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 535
 536     /* Switch buffers */
 537     p_sys->i_index = i_new_index;
 538     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 539
 540 #else
 541     /* Update the texture */
 542     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 543                      p_vout->render.i_width, p_vout->render.i_height,
 544                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 545 #endif
 546
 547     if( p_sys->p_vout->pf_unlock )
 548     {
 549         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 550     }
 551 }
 552
 553 /*****************************************************************************
 554  * DisplayVideo: displays previously rendered output
 555  *****************************************************************************/
 556 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 557 {
 558     vout_sys_t *p_sys = p_vout->p_sys;
 559     float f_width, f_height;
 560
 561     /* glTexCoord works differently with GL_TEXTURE_2D and
 562        GL_TEXTURE_RECTANGLE_EXT */
 563 #ifdef SYS_DARWIN
 564     f_width = (float)p_vout->output.i_width;
 565     f_height = (float)p_vout->output.i_height;
 566 #else
 567     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 568     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 569 #endif
 570
 571     /* Why drawing here and not in Render()? Because this way, the
 572        OpenGL providers can call pf_display to force redraw. Currently,
 573        the OS X provider uses it to get a smooth window resizing */
 574
 575     if( p_sys->p_vout->pf_lock &&
 576         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 577     {
 578         msg_Warn( p_vout, "could not lock OpenGL provider" );
 579         return;
 580     }
 581
 582     glClear( GL_COLOR_BUFFER_BIT );
 583
 584     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 585     {
 586         glEnable( VLCGL_TARGET );
 587         glBegin( GL_POLYGON );
 588         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 589         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 590         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 591         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 592         glEnd();
 593     }
 594     else
 595     {
 596         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 597
 598         glEnable( VLCGL_TARGET );
 599         glBegin( GL_QUADS );
 600
 601         /* Front */
 602         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 603         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 604         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 605         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 606
 607         /* Left */
 608         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 609         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 610         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 611         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 612
 613         /* Back */
 614         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 615         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 616         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 617         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 618
 619         /* Right */
 620         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 621         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 622         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 623         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 624
 625         /* Top */
 626         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 627         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 628         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 629         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 630
 631         /* Bottom */
 632         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 633         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 634         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 635         glTexCoord2f( f_width, 0 ); 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_MAG_FILTER, GL_LINEAR );
 696         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 697
 698         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 699         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 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 }