git.sesse.net Git - vlc/blob - modules/video_output/opengl.c

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   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 #ifndef GL_CLAMP_TO_EDGE
  73 #   define GL_CLAMP_TO_EDGE 0x812F
  74 #endif
  75
  76 /* OpenGL effects */
  77 #define OPENGL_EFFECT_NONE             1
  78 #define OPENGL_EFFECT_CUBE             2
  79 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  80
  81 /*****************************************************************************
  82  * Vout interface
  83  *****************************************************************************/
  84 static int  CreateVout   ( vlc_object_t * );
  85 static void DestroyVout  ( vlc_object_t * );
  86 static int  Init         ( vout_thread_t * );
  87 static void End          ( vout_thread_t * );
  88 static int  Manage       ( vout_thread_t * );
  89 static void Render       ( vout_thread_t *, picture_t * );
  90 static void DisplayVideo ( vout_thread_t *, picture_t * );
  91 static int  Control      ( vout_thread_t *, int, va_list );
  92
  93 static inline int GetAlignedSize( int );
  94
  95 static int InitTextures( vout_thread_t * );
  96 static int SendEvents( vlc_object_t *, char const *,
  97                        vlc_value_t, vlc_value_t, void * );
  98
  99 /*****************************************************************************
 100  * Module descriptor
 101  *****************************************************************************/
 102 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 103 /*****************************************************************************
 104  * Module descriptor
 105  *****************************************************************************/
 106 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 107 #define SPEED_LONGTEXT N_( "If the OpenGL cube effect is enabled, this " \
 108                            "controls its rotation speed." )
 109
 110 #define EFFECT_TEXT N_("Select effect")
 111 #define EFFECT_LONGTEXT N_( \
 112     "Allows you to select different visual effects.")
 113
 114 static char *ppsz_effects[] = {
 115         "none", "cube", "transparent-cube" };
 116 static char *ppsz_effects_text[] = {
 117         N_("None"), N_("Cube"), N_("Transparent Cube") };
 118
 119 vlc_module_begin();
 120     set_shortname( "OpenGL" );
 121     set_category( CAT_VIDEO );
 122     set_subcategory( SUBCAT_VIDEO_VOUT );
 123     set_description( _("OpenGL video output") );
 124 #ifdef SYS_DARWIN
 125     set_capability( "video output", 200 );
 126 #else
 127     set_capability( "video output", 20 );
 128 #endif
 129     add_shortcut( "opengl" );
 130     add_float( "opengl-cube-speed", 2.0, NULL, SPEED_TEXT,
 131                     SPEED_LONGTEXT, VLC_TRUE );
 132     set_callbacks( CreateVout, DestroyVout );
 133     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 134                  EFFECT_LONGTEXT, VLC_FALSE );
 135         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 136 vlc_module_end();
 137
 138 /*****************************************************************************
 139  * vout_sys_t: video output method descriptor
 140  *****************************************************************************
 141  * This structure is part of the video output thread descriptor.
 142  * It describes the OpenGL specific properties of the output thread.
 143  *****************************************************************************/
 144 struct vout_sys_t
 145 {
 146     vout_thread_t *p_vout;
 147
 148     uint8_t    *pp_buffer[2];
 149     int         i_index;
 150     int         i_tex_width;
 151     int         i_tex_height;
 152     GLuint      p_textures[2];
 153
 154     int         i_effect;
 155
 156     float       f_speed;
 157 };
 158
 159 /*****************************************************************************
 160  * CreateVout: This function allocates and initializes the OpenGL vout method.
 161  *****************************************************************************/
 162 static int CreateVout( vlc_object_t *p_this )
 163 {
 164     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 165     vout_sys_t *p_sys;
 166
 167     /* Allocate structure */
 168     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 169     if( p_sys == NULL )
 170     {
 171         msg_Err( p_vout, "out of memory" );
 172         return VLC_EGENERIC;
 173     }
 174
 175     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 176
 177     p_sys->i_index = 0;
 178 #ifdef SYS_DARWIN
 179     p_sys->i_tex_width  = p_vout->render.i_width;
 180     p_sys->i_tex_height = p_vout->render.i_height;
 181 #else
 182     /* A texture must have a size aligned on a power of 2 */
 183     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 184     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 185 #endif
 186
 187     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 188              p_sys->i_tex_height );
 189
 190     /* Get window */
 191     p_sys->p_vout =
 192         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 193     if( p_sys->p_vout == NULL )
 194     {
 195         msg_Err( p_vout, "out of memory" );
 196         return VLC_ENOMEM;
 197     }
 198     vlc_object_attach( p_sys->p_vout, p_this );
 199
 200     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 201     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 202     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 203     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 204     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 205     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 206     p_sys->p_vout->b_scale = p_vout->b_scale;
 207     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 208
 209     p_sys->p_vout->p_module =
 210         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 211     if( p_sys->p_vout->p_module == NULL )
 212     {
 213         msg_Warn( p_vout, "No OpenGL provider found" );
 214         vlc_object_detach( p_sys->p_vout );
 215         vlc_object_destroy( p_sys->p_vout );
 216         return VLC_ENOOBJ;
 217     }
 218
 219     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 220
 221     p_vout->pf_init = Init;
 222     p_vout->pf_end = End;
 223     p_vout->pf_manage = Manage;
 224     p_vout->pf_render = Render;
 225     p_vout->pf_display = DisplayVideo;
 226     p_vout->pf_control = Control;
 227
 228     /* Forward events from the opengl provider */
 229     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 230     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 231     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 232     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 233     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 234     var_Create( p_sys->p_vout, "video-on-top",
 235                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 236
 237     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 238     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 239     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 240     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 241     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 242
 243     return VLC_SUCCESS;
 244 }
 245
 246 /*****************************************************************************
 247  * Init: initialize the OpenGL video thread output method
 248  *****************************************************************************/
 249 static int Init( vout_thread_t *p_vout )
 250 {
 251     vout_sys_t *p_sys = p_vout->p_sys;
 252     int i_pixel_pitch;
 253     vlc_value_t val;
 254
 255     p_sys->p_vout->pf_init( p_sys->p_vout );
 256
 257 #ifdef SYS_DARWIN
 258     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 259     p_vout->output.i_rmask = 0x00ff0000;
 260     p_vout->output.i_gmask = 0x0000ff00;
 261     p_vout->output.i_bmask = 0x000000ff;
 262     i_pixel_pitch = 2;
 263 #else
 264 #if VLCGL_RGB_FORMAT == GL_RGB
 265 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 266     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 267     p_vout->output.i_rmask = 0x000000ff;
 268     p_vout->output.i_gmask = 0x0000ff00;
 269     p_vout->output.i_bmask = 0x00ff0000;
 270     i_pixel_pitch = 3;
 271 #   else
 272     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 273     p_vout->output.i_rmask = 0xf800;
 274     p_vout->output.i_gmask = 0x07e0;
 275     p_vout->output.i_bmask = 0x001f;
 276     i_pixel_pitch = 2;
 277 #   endif
 278 #else
 279     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 280     p_vout->output.i_rmask = 0x000000ff;
 281     p_vout->output.i_gmask = 0x0000ff00;
 282     p_vout->output.i_bmask = 0x00ff0000;
 283     i_pixel_pitch = 4;
 284 #endif
 285 #endif
 286
 287     /* Since OpenGL can do rescaling for us, stick to the default
 288      * coordinates and aspect. */
 289     p_vout->output.i_width  = p_vout->render.i_width;
 290     p_vout->output.i_height = p_vout->render.i_height;
 291     p_vout->output.i_aspect = p_vout->render.i_aspect;
 292
 293     /* We know the chroma, allocate one buffer which will be used
 294      * directly by the decoder */
 295     p_sys->pp_buffer[0] =
 296         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 297     if( !p_sys->pp_buffer[0] )
 298     {
 299         msg_Err( p_vout, "Out of memory" );
 300         return -1;
 301     }
 302     p_sys->pp_buffer[1] =
 303         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 304     if( !p_sys->pp_buffer[1] )
 305     {
 306         msg_Err( p_vout, "Out of memory" );
 307         return -1;
 308     }
 309
 310     p_vout->p_picture[0].i_planes = 1;
 311     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 312     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 313     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 314     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 315     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 316         p_vout->p_picture[0].p->i_pixel_pitch;
 317     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 318         p_vout->p_picture[0].p->i_pixel_pitch;
 319
 320     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 321     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 322
 323     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 324
 325     I_OUTPUTPICTURES = 1;
 326
 327     if( p_sys->p_vout->pf_lock &&
 328         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 329     {
 330         msg_Warn( p_vout, "could not lock OpenGL provider" );
 331         return 0;
 332     }
 333
 334     InitTextures( p_vout );
 335
 336     glDisable(GL_BLEND);
 337     glDisable(GL_DEPTH_TEST);
 338     glDepthMask(GL_FALSE);
 339     glDisable(GL_CULL_FACE);
 340     glClear( GL_COLOR_BUFFER_BIT );
 341
 342     /* Check if the user asked for useless visual effects */
 343     var_Get( p_vout, "opengl-effect", &val );
 344     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 345     {
 346         p_sys->i_effect = OPENGL_EFFECT_NONE;
 347     }
 348     else if( !strcmp( val.psz_string, "cube" ) )
 349     {
 350         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 351
 352         glEnable( GL_CULL_FACE);
 353         //glEnable( GL_DEPTH_TEST );
 354     }
 355     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 356     {
 357         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 358
 359         glDisable( GL_DEPTH_TEST );
 360         glEnable( GL_BLEND );
 361         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 362     }
 363     else
 364     {
 365         msg_Warn( p_vout, "no valid opengl effect provided, using "
 366                   "\"none\"" );
 367         p_sys->i_effect = OPENGL_EFFECT_NONE;
 368     }
 369     if( val.psz_string ) free( val.psz_string );
 370
 371     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 372                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 373     {
 374         /* Set the perpective */
 375         glMatrixMode( GL_PROJECTION );
 376         glLoadIdentity();
 377         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 378         glMatrixMode( GL_MODELVIEW );
 379         glLoadIdentity();
 380         glTranslatef( 0.0, 0.0, - 5.0 );
 381     }
 382
 383     if( p_sys->p_vout->pf_unlock )
 384     {
 385         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 386     }
 387
 388     return 0;
 389 }
 390
 391 /*****************************************************************************
 392  * End: terminate GLX video thread output method
 393  *****************************************************************************/
 394 static void End( vout_thread_t *p_vout )
 395 {
 396     vout_sys_t *p_sys = p_vout->p_sys;
 397
 398     if( p_sys->p_vout->pf_lock &&
 399         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 400     {
 401         msg_Warn( p_vout, "could not lock OpenGL provider" );
 402         return;
 403     }
 404
 405     glFinish();
 406     glFlush();
 407
 408     if( p_sys->p_vout->pf_unlock )
 409     {
 410         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 411     }
 412 }
 413
 414 /*****************************************************************************
 415  * Destroy: destroy GLX video thread output method
 416  *****************************************************************************
 417  * Terminate an output method created by CreateVout
 418  *****************************************************************************/
 419 static void DestroyVout( vlc_object_t *p_this )
 420 {
 421     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 422     vout_sys_t *p_sys = p_vout->p_sys;
 423
 424     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 425     vlc_object_detach( p_sys->p_vout );
 426     vlc_object_destroy( p_sys->p_vout );
 427
 428     /* Free the texture buffer*/
 429     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 430     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 431
 432     free( p_sys );
 433 }
 434
 435 /*****************************************************************************
 436  * Manage: handle Sys events
 437  *****************************************************************************
 438  * This function should be called regularly by video output thread. It returns
 439  * a non null value if an error occurred.
 440  *****************************************************************************/
 441 static int Manage( vout_thread_t *p_vout )
 442 {
 443     vout_sys_t *p_sys = p_vout->p_sys;
 444     int i_ret, i_fullscreen_change;
 445
 446     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 447
 448     p_sys->p_vout->i_changes = p_vout->i_changes;
 449     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 450     p_vout->i_changes = p_sys->p_vout->i_changes;
 451
 452 #ifdef SYS_DARWIN
 453     if( p_sys->p_vout->pf_lock &&
 454         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 455     {
 456         msg_Warn( p_vout, "could not lock OpenGL provider" );
 457         return i_ret;
 458     }
 459
 460     /* On OS X, we create the window and the GL view when entering
 461        fullscreen - the textures have to be inited again */
 462     if( i_fullscreen_change )
 463     {
 464         InitTextures( p_vout );
 465
 466         switch( p_sys->i_effect )
 467         {
 468             case OPENGL_EFFECT_CUBE:
 469                 glEnable( GL_CULL_FACE );
 470                 break;
 471
 472             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 473                 glDisable( GL_DEPTH_TEST );
 474                 glEnable( GL_BLEND );
 475                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 476                 break;
 477         }
 478
 479         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 480                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 481         {
 482             /* Set the perpective */
 483             glMatrixMode( GL_PROJECTION );
 484             glLoadIdentity();
 485             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 486             glMatrixMode( GL_MODELVIEW );
 487             glLoadIdentity();
 488             glTranslatef( 0.0, 0.0, - 5.0 );
 489         }
 490     }
 491
 492     if( p_sys->p_vout->pf_unlock )
 493     {
 494         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 495     }
 496 #endif
 497
 498     return i_ret;
 499 }
 500
 501 /*****************************************************************************
 502  * Render: render previously calculated output
 503  *****************************************************************************/
 504 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 505 {
 506     vout_sys_t *p_sys = p_vout->p_sys;
 507
 508     /* On Win32/GLX, we do this the usual way:
 509        + Fill the buffer with new content,
 510        + Reload the texture,
 511        + Use the texture.
 512
 513        On OS X with VRAM or AGP texturing, the order has to be:
 514        + Reload the texture,
 515        + Fill the buffer with new content,
 516        + Use the texture.
 517
 518        (Thanks to gcc from the Arstechnica forums for the tip)
 519
 520        Therefore, we have to use two buffers and textures. On Win32/GLX,
 521        we reload the texture to be displayed and use it right away. On
 522        OS X, we first render, then reload the texture to be used next
 523        time. */
 524
 525     if( p_sys->p_vout->pf_lock &&
 526         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 527     {
 528         msg_Warn( p_vout, "could not lock OpenGL provider" );
 529         return;
 530     }
 531
 532 #ifdef SYS_DARWIN
 533     int i_new_index;
 534     i_new_index = ( p_sys->i_index + 1 ) & 1;
 535
 536
 537     /* Update the texture */
 538     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 539     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 540                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 541                      p_sys->pp_buffer[i_new_index] );
 542
 543     /* Bind to the previous texture for drawing */
 544     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 545
 546     /* Switch buffers */
 547     p_sys->i_index = i_new_index;
 548     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 549
 550 #else
 551     /* Update the texture */
 552     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 553                      p_vout->render.i_width, p_vout->render.i_height,
 554                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 555 #endif
 556
 557     if( p_sys->p_vout->pf_unlock )
 558     {
 559         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 560     }
 561 }
 562
 563 /*****************************************************************************
 564  * DisplayVideo: displays previously rendered output
 565  *****************************************************************************/
 566 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 567 {
 568     vout_sys_t *p_sys = p_vout->p_sys;
 569     float f_width, f_height;
 570
 571     if( p_sys->p_vout->pf_lock &&
 572         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 573     {
 574         msg_Warn( p_vout, "could not lock OpenGL provider" );
 575         return;
 576     }
 577
 578     /* glTexCoord works differently with GL_TEXTURE_2D and
 579        GL_TEXTURE_RECTANGLE_EXT */
 580 #ifdef SYS_DARWIN
 581     f_width = (float)p_vout->output.i_width;
 582     f_height = (float)p_vout->output.i_height;
 583 #else
 584     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 585     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 586 #endif
 587
 588     /* Why drawing here and not in Render()? Because this way, the
 589        OpenGL providers can call pf_display to force redraw. Currently,
 590        the OS X provider uses it to get a smooth window resizing */
 591
 592     glClear( GL_COLOR_BUFFER_BIT );
 593
 594     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 595     {
 596         glEnable( VLCGL_TARGET );
 597         glBegin( GL_POLYGON );
 598         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 599         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 600         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 601         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 602         glEnd();
 603     }
 604     else
 605     {
 606         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 607
 608         glEnable( VLCGL_TARGET );
 609         glBegin( GL_QUADS );
 610
 611         /* Front */
 612         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 613         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 614         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 615         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 616
 617         /* Left */
 618         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 619         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 620         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 621         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 622
 623         /* Back */
 624         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 625         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 626         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 627         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 628
 629         /* Right */
 630         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 631         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 632         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 633         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 634
 635         /* Top */
 636         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 637         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 638         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 639         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 640
 641         /* Bottom */
 642         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 643         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 644         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 645         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 646         glEnd();
 647     }
 648
 649     glDisable( VLCGL_TARGET );
 650
 651     p_sys->p_vout->pf_swap( p_sys->p_vout );
 652
 653     if( p_sys->p_vout->pf_unlock )
 654     {
 655         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 656     }
 657 }
 658
 659 int GetAlignedSize( int i_size )
 660 {
 661     /* Return the nearest power of 2 */
 662     int i_result = 1;
 663     while( i_result < i_size )
 664     {
 665         i_result *= 2;
 666     }
 667     return i_result;
 668 }
 669
 670 /*****************************************************************************
 671  * Control: control facility for the vout
 672  *****************************************************************************/
 673 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 674 {
 675     vout_sys_t *p_sys = p_vout->p_sys;
 676
 677     switch( i_query )
 678     {
 679     case VOUT_SNAPSHOT:
 680         return vout_vaControlDefault( p_vout, i_query, args );
 681
 682     default:
 683         if( p_sys->p_vout->pf_control )
 684             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 685         else
 686             return vout_vaControlDefault( p_vout, i_query, args );
 687     }
 688 }
 689
 690 static int InitTextures( vout_thread_t *p_vout )
 691 {
 692     vout_sys_t *p_sys = p_vout->p_sys;
 693     int i_index;
 694
 695     glDeleteTextures( 2, p_sys->p_textures );
 696     glGenTextures( 2, p_sys->p_textures );
 697
 698     for( i_index = 0; i_index < 2; i_index++ )
 699     {
 700         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 701
 702         /* Set the texture parameters */
 703         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 704
 705         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 706         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 707
 708         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 709         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 710
 711         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 712
 713 #ifdef SYS_DARWIN
 714         /* Tell the driver not to make a copy of the texture but to use
 715            our buffer */
 716         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 717         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 718
 719 #if 0
 720         /* Use VRAM texturing */
 721         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 722                          GL_STORAGE_CACHED_APPLE );
 723 #else
 724         /* Use AGP texturing */
 725         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 726                          GL_STORAGE_SHARED_APPLE );
 727 #endif
 728 #endif
 729
 730         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 731         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 732                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 733                       p_sys->pp_buffer[i_index] );
 734     }
 735
 736     return 0;
 737 }
 738
 739 /*****************************************************************************
 740  * SendEvents: forward mouse and keyboard events to the parent p_vout
 741  *****************************************************************************/
 742 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 743                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 744 {
 745     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 746 }