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