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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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 __APPLE__
  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_( "Rotation speed of the OpenGL cube effect, if " \
 120         "enabled." )
 121
 122 #define EFFECT_TEXT N_("Effect")
 123 #define EFFECT_LONGTEXT N_( \
 124     "Several visual OpenGL effects are available." )
 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 __APPLE__
 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 __APPLE__
 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 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 272 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 273     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 274     i_pixel_pitch = 2;
 275
 276 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 277     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 278     i_pixel_pitch = 2;
 279
 280 #elif VLCGL_FORMAT == GL_RGB
 281 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 282     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 283 #       if defined( WORDS_BIGENDIAN )
 284     p_vout->output.i_rmask = 0x00ff0000;
 285     p_vout->output.i_gmask = 0x0000ff00;
 286     p_vout->output.i_bmask = 0x000000ff;
 287 #       else
 288     p_vout->output.i_rmask = 0x000000ff;
 289     p_vout->output.i_gmask = 0x0000ff00;
 290     p_vout->output.i_bmask = 0x00ff0000;
 291 #       endif
 292     i_pixel_pitch = 3;
 293 #   else
 294     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 295 #       if defined( WORDS_BIGENDIAN )
 296     p_vout->output.i_rmask = 0x001f;
 297     p_vout->output.i_gmask = 0x07e0;
 298     p_vout->output.i_bmask = 0xf800;
 299 #       else
 300     p_vout->output.i_rmask = 0xf800;
 301     p_vout->output.i_gmask = 0x07e0;
 302     p_vout->output.i_bmask = 0x001f;
 303 #       endif
 304     i_pixel_pitch = 2;
 305 #   endif
 306 #else
 307     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 308 #       if defined( WORDS_BIGENDIAN )
 309     p_vout->output.i_rmask = 0xff000000;
 310     p_vout->output.i_gmask = 0x00ff0000;
 311     p_vout->output.i_bmask = 0x0000ff00;
 312 #       else
 313     p_vout->output.i_rmask = 0x000000ff;
 314     p_vout->output.i_gmask = 0x0000ff00;
 315     p_vout->output.i_bmask = 0x00ff0000;
 316 #       endif
 317     i_pixel_pitch = 4;
 318 #endif
 319
 320     /* Since OpenGL can do rescaling for us, stick to the default
 321      * coordinates and aspect. */
 322     p_vout->output.i_width  = p_vout->render.i_width;
 323     p_vout->output.i_height = p_vout->render.i_height;
 324     p_vout->output.i_aspect = p_vout->render.i_aspect;
 325
 326     p_vout->fmt_out = p_vout->fmt_in;
 327     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 328
 329     /* We know the chroma, allocate one buffer which will be used
 330      * directly by the decoder */
 331     p_sys->pp_buffer[0] =
 332         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 333     if( !p_sys->pp_buffer[0] )
 334     {
 335         msg_Err( p_vout, "out of memory" );
 336         return -1;
 337     }
 338     p_sys->pp_buffer[1] =
 339         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 340     if( !p_sys->pp_buffer[1] )
 341     {
 342         msg_Err( p_vout, "out of memory" );
 343         return -1;
 344     }
 345
 346     p_vout->p_picture[0].i_planes = 1;
 347     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 348     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 349     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 350     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 351     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 352         p_vout->p_picture[0].p->i_pixel_pitch;
 353     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 354         p_vout->p_picture[0].p->i_pixel_pitch;
 355
 356     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 357     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 358
 359     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 360
 361     I_OUTPUTPICTURES = 1;
 362
 363     if( p_sys->p_vout->pf_lock &&
 364         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 365     {
 366         msg_Warn( p_vout, "could not lock OpenGL provider" );
 367         return 0;
 368     }
 369
 370     InitTextures( p_vout );
 371
 372     glDisable(GL_BLEND);
 373     glDisable(GL_DEPTH_TEST);
 374     glDepthMask(GL_FALSE);
 375     glDisable(GL_CULL_FACE);
 376     glClear( GL_COLOR_BUFFER_BIT );
 377
 378     /* Check if the user asked for useless visual effects */
 379     var_Get( p_vout, "opengl-effect", &val );
 380     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 381     {
 382         p_sys->i_effect = OPENGL_EFFECT_NONE;
 383     }
 384     else if( !strcmp( val.psz_string, "cube" ) )
 385     {
 386         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 387
 388         glEnable( GL_CULL_FACE);
 389         //glEnable( GL_DEPTH_TEST );
 390     }
 391     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 392     {
 393         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 394
 395         glDisable( GL_DEPTH_TEST );
 396         glEnable( GL_BLEND );
 397         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 398     }
 399     else
 400     {
 401         msg_Warn( p_vout, "no valid opengl effect provided, using "
 402                   "\"none\"" );
 403         p_sys->i_effect = OPENGL_EFFECT_NONE;
 404     }
 405     if( val.psz_string ) free( val.psz_string );
 406
 407     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 408                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 409     {
 410         /* Set the perpective */
 411         glMatrixMode( GL_PROJECTION );
 412         glLoadIdentity();
 413         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 414         glMatrixMode( GL_MODELVIEW );
 415         glLoadIdentity();
 416         glTranslatef( 0.0, 0.0, - 5.0 );
 417     }
 418
 419     if( p_sys->p_vout->pf_unlock )
 420     {
 421         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 422     }
 423
 424     return 0;
 425 }
 426
 427 /*****************************************************************************
 428  * End: terminate GLX video thread output method
 429  *****************************************************************************/
 430 static void End( vout_thread_t *p_vout )
 431 {
 432     vout_sys_t *p_sys = p_vout->p_sys;
 433
 434     if( p_sys->p_vout->pf_lock &&
 435         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 436     {
 437         msg_Warn( p_vout, "could not lock OpenGL provider" );
 438         return;
 439     }
 440
 441     glFinish();
 442     glFlush();
 443
 444     if( p_sys->p_vout->pf_unlock )
 445     {
 446         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 447     }
 448 }
 449
 450 /*****************************************************************************
 451  * Destroy: destroy GLX video thread output method
 452  *****************************************************************************
 453  * Terminate an output method created by CreateVout
 454  *****************************************************************************/
 455 static void DestroyVout( vlc_object_t *p_this )
 456 {
 457     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 458     vout_sys_t *p_sys = p_vout->p_sys;
 459
 460     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 461     vlc_object_detach( p_sys->p_vout );
 462     vlc_object_destroy( p_sys->p_vout );
 463
 464     /* Free the texture buffer*/
 465     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 466     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 467
 468     free( p_sys );
 469 }
 470
 471 /*****************************************************************************
 472  * Manage: handle Sys events
 473  *****************************************************************************
 474  * This function should be called regularly by video output thread. It returns
 475  * a non null value if an error occurred.
 476  *****************************************************************************/
 477 static int Manage( vout_thread_t *p_vout )
 478 {
 479     vout_sys_t *p_sys = p_vout->p_sys;
 480     int i_ret, i_fullscreen_change;
 481
 482     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 483
 484     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 485         p_vout->fmt_in.i_x_offset;
 486     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 487         p_vout->fmt_in.i_y_offset;
 488     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 489         p_vout->fmt_in.i_visible_width;
 490     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 491         p_vout->fmt_in.i_visible_height;
 492     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 493         p_vout->fmt_in.i_aspect;
 494     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 495         p_vout->fmt_in.i_sar_num;
 496     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 497         p_vout->fmt_in.i_sar_den;
 498     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 499
 500     p_sys->p_vout->i_changes = p_vout->i_changes;
 501     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 502     p_vout->i_changes = p_sys->p_vout->i_changes;
 503
 504 #ifdef __APPLE__
 505     if( p_sys->p_vout->pf_lock &&
 506         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 507     {
 508         msg_Warn( p_vout, "could not lock OpenGL provider" );
 509         return i_ret;
 510     }
 511
 512     /* On OS X, we create the window and the GL view when entering
 513        fullscreen - the textures have to be inited again */
 514     if( i_fullscreen_change )
 515     {
 516         InitTextures( p_vout );
 517
 518         switch( p_sys->i_effect )
 519         {
 520             case OPENGL_EFFECT_CUBE:
 521                 glEnable( GL_CULL_FACE );
 522                 break;
 523
 524             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 525                 glDisable( GL_DEPTH_TEST );
 526                 glEnable( GL_BLEND );
 527                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 528                 break;
 529         }
 530
 531         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 532                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 533         {
 534             /* Set the perpective */
 535             glMatrixMode( GL_PROJECTION );
 536             glLoadIdentity();
 537             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 538             glMatrixMode( GL_MODELVIEW );
 539             glLoadIdentity();
 540             glTranslatef( 0.0, 0.0, - 5.0 );
 541         }
 542     }
 543
 544     if( p_sys->p_vout->pf_unlock )
 545     {
 546         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 547     }
 548 #endif
 549
 550     return i_ret;
 551 }
 552
 553 /*****************************************************************************
 554  * Render: render previously calculated output
 555  *****************************************************************************/
 556 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 557 {
 558     vout_sys_t *p_sys = p_vout->p_sys;
 559
 560     /* On Win32/GLX, we do this the usual way:
 561        + Fill the buffer with new content,
 562        + Reload the texture,
 563        + Use the texture.
 564
 565        On OS X with VRAM or AGP texturing, the order has to be:
 566        + Reload the texture,
 567        + Fill the buffer with new content,
 568        + Use the texture.
 569
 570        (Thanks to gcc from the Arstechnica forums for the tip)
 571
 572        Therefore, we have to use two buffers and textures. On Win32/GLX,
 573        we reload the texture to be displayed and use it right away. On
 574        OS X, we first render, then reload the texture to be used next
 575        time. */
 576
 577     if( p_sys->p_vout->pf_lock &&
 578         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 579     {
 580         msg_Warn( p_vout, "could not lock OpenGL provider" );
 581         return;
 582     }
 583
 584 #ifdef __APPLE__
 585     int i_new_index;
 586     i_new_index = ( p_sys->i_index + 1 ) & 1;
 587
 588
 589     /* Update the texture */
 590     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 591     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 592                      p_vout->fmt_out.i_width,
 593                      p_vout->fmt_out.i_height,
 594                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 595
 596     /* Bind to the previous texture for drawing */
 597     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 598
 599     /* Switch buffers */
 600     p_sys->i_index = i_new_index;
 601     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 602
 603 #else
 604     /* Update the texture */
 605     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 606                      p_vout->fmt_out.i_width,
 607                      p_vout->fmt_out.i_height,
 608                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 609 #endif
 610
 611     if( p_sys->p_vout->pf_unlock )
 612     {
 613         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 614     }
 615 }
 616
 617 /*****************************************************************************
 618  * DisplayVideo: displays previously rendered output
 619  *****************************************************************************/
 620 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 621 {
 622     vout_sys_t *p_sys = p_vout->p_sys;
 623     float f_width, f_height, f_x, f_y;
 624
 625     if( p_sys->p_vout->pf_lock &&
 626         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 627     {
 628         msg_Warn( p_vout, "could not lock OpenGL provider" );
 629         return;
 630     }
 631
 632     /* glTexCoord works differently with GL_TEXTURE_2D and
 633        GL_TEXTURE_RECTANGLE_EXT */
 634 #ifdef __APPLE__
 635     f_x = (float)p_vout->fmt_out.i_x_offset;
 636     f_y = (float)p_vout->fmt_out.i_y_offset;
 637     f_width = (float)p_vout->fmt_out.i_x_offset +
 638               (float)p_vout->fmt_out.i_visible_width;
 639     f_height = (float)p_vout->fmt_out.i_y_offset +
 640                (float)p_vout->fmt_out.i_visible_height;
 641 #else
 642     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 643     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 644     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 645                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 646     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 647                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 648 #endif
 649
 650     /* Why drawing here and not in Render()? Because this way, the
 651        OpenGL providers can call pf_display to force redraw. Currently,
 652        the OS X provider uses it to get a smooth window resizing */
 653
 654     glClear( GL_COLOR_BUFFER_BIT );
 655
 656     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 657     {
 658         glEnable( VLCGL_TARGET );
 659         glBegin( GL_POLYGON );
 660         glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 661         glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 662         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 663         glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 664         glEnd();
 665     }
 666     else
 667     {
 668         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 669
 670         glEnable( VLCGL_TARGET );
 671         glBegin( GL_QUADS );
 672
 673         /* Front */
 674         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, 1.0 );
 675         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 676         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 677         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, 1.0 );
 678
 679         /* Left */
 680         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 681         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 682         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 683         glTexCoord2f( f_width, f_y ); glVertex3f( - 1.0, 1.0, 1.0 );
 684
 685         /* Back */
 686         glTexCoord2f( f_x, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 687         glTexCoord2f( f_x, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 688         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 689         glTexCoord2f( f_width, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 690
 691         /* Right */
 692         glTexCoord2f( f_x, f_y ); glVertex3f( 1.0, 1.0, 1.0 );
 693         glTexCoord2f( f_x, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 694         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 695         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 696
 697         /* Top */
 698         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 699         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 700         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 701         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 702
 703         /* Bottom */
 704         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, - 1.0, 1.0 );
 705         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 706         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 707         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, - 1.0, 1.0 );
 708         glEnd();
 709     }
 710
 711     glDisable( VLCGL_TARGET );
 712
 713     p_sys->p_vout->pf_swap( p_sys->p_vout );
 714
 715     if( p_sys->p_vout->pf_unlock )
 716     {
 717         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 718     }
 719 }
 720
 721 int GetAlignedSize( int i_size )
 722 {
 723     /* Return the nearest power of 2 */
 724     int i_result = 1;
 725     while( i_result < i_size )
 726     {
 727         i_result *= 2;
 728     }
 729     return i_result;
 730 }
 731
 732 /*****************************************************************************
 733  * Control: control facility for the vout
 734  *****************************************************************************/
 735 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 736 {
 737     vout_sys_t *p_sys = p_vout->p_sys;
 738
 739     switch( i_query )
 740     {
 741     case VOUT_SNAPSHOT:
 742         return vout_vaControlDefault( p_vout, i_query, args );
 743
 744     default:
 745         if( p_sys->p_vout->pf_control )
 746             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 747         else
 748             return vout_vaControlDefault( p_vout, i_query, args );
 749     }
 750 }
 751
 752 static int InitTextures( vout_thread_t *p_vout )
 753 {
 754     vout_sys_t *p_sys = p_vout->p_sys;
 755     int i_index;
 756
 757     glDeleteTextures( 2, p_sys->p_textures );
 758     glGenTextures( 2, p_sys->p_textures );
 759
 760     for( i_index = 0; i_index < 2; i_index++ )
 761     {
 762         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 763
 764         /* Set the texture parameters */
 765         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 766
 767         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 768         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 769
 770         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 771         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 772
 773         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 774
 775 #ifdef __APPLE__
 776         /* Tell the driver not to make a copy of the texture but to use
 777            our buffer */
 778         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 779         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 780
 781 #if 0
 782         /* Use VRAM texturing */
 783         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 784                          GL_STORAGE_CACHED_APPLE );
 785 #else
 786         /* Use AGP texturing */
 787         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 788                          GL_STORAGE_SHARED_APPLE );
 789 #endif
 790 #endif
 791
 792         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 793         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 794                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 795                       p_sys->pp_buffer[i_index] );
 796     }
 797
 798     return 0;
 799 }
 800
 801 /*****************************************************************************
 802  * SendEvents: forward mouse and keyboard events to the parent p_vout
 803  *****************************************************************************/
 804 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 805                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 806 {
 807     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 808 }