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 /* YUY2 */
  68 #ifndef YCBCR_MESA
  69 #define YCBCR_MESA 0x8757
  70 #endif
  71 #ifndef UNSIGNED_SHORT_8_8_MESA
  72 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
  73 #endif
  74 #define VLCGL_YUV_FORMAT YCBCR_MESA
  75 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  76
  77 /* Use RGB on Win32/GLX */
  78 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  79 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  80 //#define VLCGL_FORMAT VLCGL_YUV_FORMAT
  81 //#define VLCGL_TYPE   VLCGL_YUV_TYPE
  82 #endif
  83
  84 #ifndef GL_CLAMP_TO_EDGE
  85 #   define GL_CLAMP_TO_EDGE 0x812F
  86 #endif
  87
  88 /* OpenGL effects */
  89 #define OPENGL_EFFECT_NONE             1
  90 #define OPENGL_EFFECT_CUBE             2
  91 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  92
  93 /*****************************************************************************
  94  * Vout interface
  95  *****************************************************************************/
  96 static int  CreateVout   ( vlc_object_t * );
  97 static void DestroyVout  ( vlc_object_t * );
  98 static int  Init         ( vout_thread_t * );
  99 static void End          ( vout_thread_t * );
 100 static int  Manage       ( vout_thread_t * );
 101 static void Render       ( vout_thread_t *, picture_t * );
 102 static void DisplayVideo ( vout_thread_t *, picture_t * );
 103 static int  Control      ( vout_thread_t *, int, va_list );
 104
 105 static inline int GetAlignedSize( int );
 106
 107 static int InitTextures( vout_thread_t * );
 108 static int SendEvents( vlc_object_t *, char const *,
 109                        vlc_value_t, vlc_value_t, void * );
 110
 111 /*****************************************************************************
 112  * Module descriptor
 113  *****************************************************************************/
 114 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 115 /*****************************************************************************
 116  * Module descriptor
 117  *****************************************************************************/
 118 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 119 #define SPEED_LONGTEXT N_( "If the OpenGL cube effect is enabled, this " \
 120                            "controls its rotation speed." )
 121
 122 #define EFFECT_TEXT N_("Select effect")
 123 #define EFFECT_LONGTEXT N_( \
 124     "Allows you to select different visual effects.")
 125
 126 static char *ppsz_effects[] = {
 127         "none", "cube", "transparent-cube" };
 128 static char *ppsz_effects_text[] = {
 129         N_("None"), N_("Cube"), N_("Transparent Cube") };
 130
 131 vlc_module_begin();
 132     set_shortname( "OpenGL" );
 133     set_category( CAT_VIDEO );
 134     set_subcategory( SUBCAT_VIDEO_VOUT );
 135     set_description( _("OpenGL video output") );
 136 #ifdef SYS_DARWIN
 137     set_capability( "video output", 200 );
 138 #else
 139     set_capability( "video output", 20 );
 140 #endif
 141     add_shortcut( "opengl" );
 142     add_float( "opengl-cube-speed", 2.0, NULL, SPEED_TEXT,
 143                     SPEED_LONGTEXT, VLC_TRUE );
 144     set_callbacks( CreateVout, DestroyVout );
 145     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 146                  EFFECT_LONGTEXT, VLC_FALSE );
 147         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 148 vlc_module_end();
 149
 150 /*****************************************************************************
 151  * vout_sys_t: video output method descriptor
 152  *****************************************************************************
 153  * This structure is part of the video output thread descriptor.
 154  * It describes the OpenGL specific properties of the output thread.
 155  *****************************************************************************/
 156 struct vout_sys_t
 157 {
 158     vout_thread_t *p_vout;
 159
 160     uint8_t    *pp_buffer[2];
 161     int         i_index;
 162     int         i_tex_width;
 163     int         i_tex_height;
 164     GLuint      p_textures[2];
 165
 166     int         i_effect;
 167
 168     float       f_speed;
 169 };
 170
 171 /*****************************************************************************
 172  * CreateVout: This function allocates and initializes the OpenGL vout method.
 173  *****************************************************************************/
 174 static int CreateVout( vlc_object_t *p_this )
 175 {
 176     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 177     vout_sys_t *p_sys;
 178
 179     /* Allocate structure */
 180     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 181     if( p_sys == NULL )
 182     {
 183         msg_Err( p_vout, "out of memory" );
 184         return VLC_EGENERIC;
 185     }
 186
 187     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 188
 189     p_sys->i_index = 0;
 190 #ifdef SYS_DARWIN
 191     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 192     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 193 #else
 194     /* A texture must have a size aligned on a power of 2 */
 195     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 196     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 197 #endif
 198
 199     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 200              p_sys->i_tex_height );
 201
 202     /* Get window */
 203     p_sys->p_vout =
 204         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 205     if( p_sys->p_vout == NULL )
 206     {
 207         msg_Err( p_vout, "out of memory" );
 208         return VLC_ENOMEM;
 209     }
 210     vlc_object_attach( p_sys->p_vout, p_this );
 211
 212     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 213     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 214     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 215     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 216     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 217     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 218     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 219     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 220     p_sys->p_vout->b_scale = p_vout->b_scale;
 221     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 222
 223     p_sys->p_vout->p_module =
 224         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 225     if( p_sys->p_vout->p_module == NULL )
 226     {
 227         msg_Warn( p_vout, "No OpenGL provider found" );
 228         vlc_object_detach( p_sys->p_vout );
 229         vlc_object_destroy( p_sys->p_vout );
 230         return VLC_ENOOBJ;
 231     }
 232
 233     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 234
 235     p_vout->pf_init = Init;
 236     p_vout->pf_end = End;
 237     p_vout->pf_manage = Manage;
 238     p_vout->pf_render = Render;
 239     p_vout->pf_display = DisplayVideo;
 240     p_vout->pf_control = Control;
 241
 242     /* Forward events from the opengl provider */
 243     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 244     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 245     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 246     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 247     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 248     var_Create( p_sys->p_vout, "video-on-top",
 249                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 250
 251     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 252     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 253     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 254     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 255     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 256
 257     return VLC_SUCCESS;
 258 }
 259
 260 /*****************************************************************************
 261  * Init: initialize the OpenGL video thread output method
 262  *****************************************************************************/
 263 static int Init( vout_thread_t *p_vout )
 264 {
 265     vout_sys_t *p_sys = p_vout->p_sys;
 266     int i_pixel_pitch;
 267     vlc_value_t val;
 268
 269     p_sys->p_vout->pf_init( p_sys->p_vout );
 270
 271 #if defined( SYS_DARWIN ) || (VLCGL_FORMAT == YCBCR_MESA)
 272     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 273     i_pixel_pitch = 2;
 274
 275 #elif VLCGL_FORMAT == GL_RGB
 276 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 277     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 278     p_vout->output.i_rmask = 0x000000ff;
 279     p_vout->output.i_gmask = 0x0000ff00;
 280     p_vout->output.i_bmask = 0x00ff0000;
 281     i_pixel_pitch = 3;
 282 #   else
 283     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 284     p_vout->output.i_rmask = 0xf800;
 285     p_vout->output.i_gmask = 0x07e0;
 286     p_vout->output.i_bmask = 0x001f;
 287     i_pixel_pitch = 2;
 288 #   endif
 289 #else
 290     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 291     p_vout->output.i_rmask = 0x000000ff;
 292     p_vout->output.i_gmask = 0x0000ff00;
 293     p_vout->output.i_bmask = 0x00ff0000;
 294     i_pixel_pitch = 4;
 295 #endif
 296
 297     /* Since OpenGL can do rescaling for us, stick to the default
 298      * coordinates and aspect. */
 299     p_vout->output.i_width  = p_vout->render.i_width;
 300     p_vout->output.i_height = p_vout->render.i_height;
 301     p_vout->output.i_aspect = p_vout->render.i_aspect;
 302
 303     p_vout->fmt_out = p_vout->fmt_in;
 304     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 305
 306     /* We know the chroma, allocate one buffer which will be used
 307      * directly by the decoder */
 308     p_sys->pp_buffer[0] =
 309         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 310     if( !p_sys->pp_buffer[0] )
 311     {
 312         msg_Err( p_vout, "Out of memory" );
 313         return -1;
 314     }
 315     p_sys->pp_buffer[1] =
 316         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 317     if( !p_sys->pp_buffer[1] )
 318     {
 319         msg_Err( p_vout, "Out of memory" );
 320         return -1;
 321     }
 322
 323     p_vout->p_picture[0].i_planes = 1;
 324     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 325     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 326     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 327     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 328     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 329         p_vout->p_picture[0].p->i_pixel_pitch;
 330     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 331         p_vout->p_picture[0].p->i_pixel_pitch;
 332
 333     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 334     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 335
 336     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 337
 338     I_OUTPUTPICTURES = 1;
 339
 340     if( p_sys->p_vout->pf_lock &&
 341         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 342     {
 343         msg_Warn( p_vout, "could not lock OpenGL provider" );
 344         return 0;
 345     }
 346
 347     InitTextures( p_vout );
 348
 349     glDisable(GL_BLEND);
 350     glDisable(GL_DEPTH_TEST);
 351     glDepthMask(GL_FALSE);
 352     glDisable(GL_CULL_FACE);
 353     glClear( GL_COLOR_BUFFER_BIT );
 354
 355     /* Check if the user asked for useless visual effects */
 356     var_Get( p_vout, "opengl-effect", &val );
 357     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 358     {
 359         p_sys->i_effect = OPENGL_EFFECT_NONE;
 360     }
 361     else if( !strcmp( val.psz_string, "cube" ) )
 362     {
 363         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 364
 365         glEnable( GL_CULL_FACE);
 366         //glEnable( GL_DEPTH_TEST );
 367     }
 368     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 369     {
 370         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 371
 372         glDisable( GL_DEPTH_TEST );
 373         glEnable( GL_BLEND );
 374         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 375     }
 376     else
 377     {
 378         msg_Warn( p_vout, "no valid opengl effect provided, using "
 379                   "\"none\"" );
 380         p_sys->i_effect = OPENGL_EFFECT_NONE;
 381     }
 382     if( val.psz_string ) free( val.psz_string );
 383
 384     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 385                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 386     {
 387         /* Set the perpective */
 388         glMatrixMode( GL_PROJECTION );
 389         glLoadIdentity();
 390         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 391         glMatrixMode( GL_MODELVIEW );
 392         glLoadIdentity();
 393         glTranslatef( 0.0, 0.0, - 5.0 );
 394     }
 395
 396     if( p_sys->p_vout->pf_unlock )
 397     {
 398         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 399     }
 400
 401     return 0;
 402 }
 403
 404 /*****************************************************************************
 405  * End: terminate GLX video thread output method
 406  *****************************************************************************/
 407 static void End( vout_thread_t *p_vout )
 408 {
 409     vout_sys_t *p_sys = p_vout->p_sys;
 410
 411     if( p_sys->p_vout->pf_lock &&
 412         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 413     {
 414         msg_Warn( p_vout, "could not lock OpenGL provider" );
 415         return;
 416     }
 417
 418     glFinish();
 419     glFlush();
 420
 421     if( p_sys->p_vout->pf_unlock )
 422     {
 423         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 424     }
 425 }
 426
 427 /*****************************************************************************
 428  * Destroy: destroy GLX video thread output method
 429  *****************************************************************************
 430  * Terminate an output method created by CreateVout
 431  *****************************************************************************/
 432 static void DestroyVout( vlc_object_t *p_this )
 433 {
 434     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 435     vout_sys_t *p_sys = p_vout->p_sys;
 436
 437     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 438     vlc_object_detach( p_sys->p_vout );
 439     vlc_object_destroy( p_sys->p_vout );
 440
 441     /* Free the texture buffer*/
 442     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 443     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 444
 445     free( p_sys );
 446 }
 447
 448 /*****************************************************************************
 449  * Manage: handle Sys events
 450  *****************************************************************************
 451  * This function should be called regularly by video output thread. It returns
 452  * a non null value if an error occurred.
 453  *****************************************************************************/
 454 static int Manage( vout_thread_t *p_vout )
 455 {
 456     vout_sys_t *p_sys = p_vout->p_sys;
 457     int i_ret, i_fullscreen_change;
 458
 459     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 460
 461     p_sys->p_vout->i_changes = p_vout->i_changes;
 462     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 463     p_vout->i_changes = p_sys->p_vout->i_changes;
 464
 465 #ifdef SYS_DARWIN
 466     if( p_sys->p_vout->pf_lock &&
 467         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 468     {
 469         msg_Warn( p_vout, "could not lock OpenGL provider" );
 470         return i_ret;
 471     }
 472
 473     /* On OS X, we create the window and the GL view when entering
 474        fullscreen - the textures have to be inited again */
 475     if( i_fullscreen_change )
 476     {
 477         InitTextures( p_vout );
 478
 479         switch( p_sys->i_effect )
 480         {
 481             case OPENGL_EFFECT_CUBE:
 482                 glEnable( GL_CULL_FACE );
 483                 break;
 484
 485             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 486                 glDisable( GL_DEPTH_TEST );
 487                 glEnable( GL_BLEND );
 488                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 489                 break;
 490         }
 491
 492         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 493                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 494         {
 495             /* Set the perpective */
 496             glMatrixMode( GL_PROJECTION );
 497             glLoadIdentity();
 498             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 499             glMatrixMode( GL_MODELVIEW );
 500             glLoadIdentity();
 501             glTranslatef( 0.0, 0.0, - 5.0 );
 502         }
 503     }
 504
 505     if( p_sys->p_vout->pf_unlock )
 506     {
 507         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 508     }
 509 #endif
 510
 511     return i_ret;
 512 }
 513
 514 /*****************************************************************************
 515  * Render: render previously calculated output
 516  *****************************************************************************/
 517 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 518 {
 519     vout_sys_t *p_sys = p_vout->p_sys;
 520
 521     /* On Win32/GLX, we do this the usual way:
 522        + Fill the buffer with new content,
 523        + Reload the texture,
 524        + Use the texture.
 525
 526        On OS X with VRAM or AGP texturing, the order has to be:
 527        + Reload the texture,
 528        + Fill the buffer with new content,
 529        + Use the texture.
 530
 531        (Thanks to gcc from the Arstechnica forums for the tip)
 532
 533        Therefore, we have to use two buffers and textures. On Win32/GLX,
 534        we reload the texture to be displayed and use it right away. On
 535        OS X, we first render, then reload the texture to be used next
 536        time. */
 537
 538     if( p_sys->p_vout->pf_lock &&
 539         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 540     {
 541         msg_Warn( p_vout, "could not lock OpenGL provider" );
 542         return;
 543     }
 544
 545 #ifdef SYS_DARWIN
 546     int i_new_index;
 547     i_new_index = ( p_sys->i_index + 1 ) & 1;
 548
 549
 550     /* Update the texture */
 551     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 552     glTexSubImage2D( VLCGL_TARGET, 0,
 553                      p_vout->fmt_out.i_x_offset, p_vout->fmt_out.i_y_offset,
 554                      p_vout->fmt_out.i_visible_width,
 555                      p_vout->fmt_out.i_visible_height,
 556                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 557
 558     /* Bind to the previous texture for drawing */
 559     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 560
 561     /* Switch buffers */
 562     p_sys->i_index = i_new_index;
 563     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 564
 565 #else
 566     /* Update the texture */
 567     glTexSubImage2D( GL_TEXTURE_2D, 0,
 568                      p_vout->fmt_out.i_x_offset, p_vout->fmt_out.i_y_offset,
 569                      p_vout->fmt_out.i_visible_width,
 570                      p_vout->fmt_out.i_visible_height,
 571                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 572 #endif
 573
 574     if( p_sys->p_vout->pf_unlock )
 575     {
 576         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 577     }
 578 }
 579
 580 /*****************************************************************************
 581  * DisplayVideo: displays previously rendered output
 582  *****************************************************************************/
 583 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 584 {
 585     vout_sys_t *p_sys = p_vout->p_sys;
 586     float f_width, f_height;
 587
 588     if( p_sys->p_vout->pf_lock &&
 589         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 590     {
 591         msg_Warn( p_vout, "could not lock OpenGL provider" );
 592         return;
 593     }
 594
 595     /* glTexCoord works differently with GL_TEXTURE_2D and
 596        GL_TEXTURE_RECTANGLE_EXT */
 597 #ifdef SYS_DARWIN
 598     f_width = (float)p_vout->fmt_out.i_visible_width;
 599     f_height = (float)p_vout->fmt_out.i_visible_height;
 600 #else
 601     f_width = (float)p_vout->fmt_out.i_visible_width / p_sys->i_tex_width;
 602     f_height = (float)p_vout->fmt_out.i_visible_height / p_sys->i_tex_height;
 603 #endif
 604
 605     /* Why drawing here and not in Render()? Because this way, the
 606        OpenGL providers can call pf_display to force redraw. Currently,
 607        the OS X provider uses it to get a smooth window resizing */
 608
 609     glClear( GL_COLOR_BUFFER_BIT );
 610
 611     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 612     {
 613         glEnable( VLCGL_TARGET );
 614         glBegin( GL_POLYGON );
 615         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 616         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 617         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 618         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 619         glEnd();
 620     }
 621     else
 622     {
 623         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 624
 625         glEnable( VLCGL_TARGET );
 626         glBegin( GL_QUADS );
 627
 628         /* Front */
 629         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 630         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 631         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 632         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 633
 634         /* Left */
 635         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 636         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 637         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 638         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 639
 640         /* Back */
 641         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 642         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 643         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 644         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 645
 646         /* Right */
 647         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 648         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 649         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 650         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 651
 652         /* Top */
 653         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 654         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 655         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 656         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 657
 658         /* Bottom */
 659         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 660         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 661         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 662         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 663         glEnd();
 664     }
 665
 666     glDisable( VLCGL_TARGET );
 667
 668     p_sys->p_vout->pf_swap( p_sys->p_vout );
 669
 670     if( p_sys->p_vout->pf_unlock )
 671     {
 672         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 673     }
 674 }
 675
 676 int GetAlignedSize( int i_size )
 677 {
 678     /* Return the nearest power of 2 */
 679     int i_result = 1;
 680     while( i_result < i_size )
 681     {
 682         i_result *= 2;
 683     }
 684     return i_result;
 685 }
 686
 687 /*****************************************************************************
 688  * Control: control facility for the vout
 689  *****************************************************************************/
 690 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 691 {
 692     vout_sys_t *p_sys = p_vout->p_sys;
 693
 694     switch( i_query )
 695     {
 696     case VOUT_SNAPSHOT:
 697         return vout_vaControlDefault( p_vout, i_query, args );
 698
 699     default:
 700         if( p_sys->p_vout->pf_control )
 701             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 702         else
 703             return vout_vaControlDefault( p_vout, i_query, args );
 704     }
 705 }
 706
 707 static int InitTextures( vout_thread_t *p_vout )
 708 {
 709     vout_sys_t *p_sys = p_vout->p_sys;
 710     int i_index;
 711
 712     glDeleteTextures( 2, p_sys->p_textures );
 713     glGenTextures( 2, p_sys->p_textures );
 714
 715     for( i_index = 0; i_index < 2; i_index++ )
 716     {
 717         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 718
 719         /* Set the texture parameters */
 720         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 721
 722         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 723         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 724
 725         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 726         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 727
 728         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 729
 730 #ifdef SYS_DARWIN
 731         /* Tell the driver not to make a copy of the texture but to use
 732            our buffer */
 733         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 734         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 735
 736 #if 0
 737         /* Use VRAM texturing */
 738         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 739                          GL_STORAGE_CACHED_APPLE );
 740 #else
 741         /* Use AGP texturing */
 742         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 743                          GL_STORAGE_SHARED_APPLE );
 744 #endif
 745 #endif
 746
 747         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 748         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 749                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 750                       p_sys->pp_buffer[i_index] );
 751     }
 752
 753     return 0;
 754 }
 755
 756 /*****************************************************************************
 757  * SendEvents: forward mouse and keyboard events to the parent p_vout
 758  *****************************************************************************/
 759 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 760                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 761 {
 762     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 763 }