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  *          Cedric Cocquebert <cedric.cocquebert@supelec.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <errno.h>                                                 /* ENOMEM */
  36
  37 #include <vlc_common.h>
  38 #include <vlc_plugin.h>
  39 #include <vlc_vout.h>
  40
  41 #ifdef __APPLE__
  42 #include <OpenGL/gl.h>
  43 #include <OpenGL/glext.h>
  44
  45 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  46    This allows sizes which are not powers of 2 */
  47 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  48
  49 /* OS X OpenGL supports YUV. Hehe. */
  50 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  51 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  52 #else
  53
  54 #include <GL/gl.h>
  55 #define VLCGL_TARGET GL_TEXTURE_2D
  56
  57 /* RV16 */
  58 #ifndef GL_UNSIGNED_SHORT_5_6_5
  59 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  60 #endif
  61 //#define VLCGL_RGB_FORMAT GL_RGB
  62 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  63
  64 /* RV24 */
  65 //#define VLCGL_RGB_FORMAT GL_RGB
  66 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  67
  68 /* RV32 */
  69 #define VLCGL_RGB_FORMAT GL_RGBA
  70 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  71
  72 /* YUY2 */
  73 #ifndef YCBCR_MESA
  74 #define YCBCR_MESA 0x8757
  75 #endif
  76 #ifndef UNSIGNED_SHORT_8_8_MESA
  77 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
  78 #endif
  79 #define VLCGL_YUV_FORMAT YCBCR_MESA
  80 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  81
  82 /* Use RGB on Win32/GLX */
  83 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  84 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  85 //#define VLCGL_FORMAT VLCGL_YUV_FORMAT
  86 //#define VLCGL_TYPE   VLCGL_YUV_TYPE
  87 #endif
  88
  89 #ifndef GL_CLAMP_TO_EDGE
  90 #   define GL_CLAMP_TO_EDGE 0x812F
  91 #endif
  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 #define PROVIDER_TEXT N_("OpenGL Provider")
 112 #define PROVIDER_LONGTEXT N_("Allows you to modify what OpenGL provider should be used")
 113
 114 vlc_module_begin ()
 115     set_shortname( "OpenGL" )
 116     set_category( CAT_VIDEO )
 117     set_subcategory( SUBCAT_VIDEO_VOUT )
 118     set_description( N_("OpenGL video output") )
 119 #ifdef __APPLE__
 120     set_capability( "video output", 200 )
 121 #else
 122     set_capability( "video output", 20 )
 123 #endif
 124     add_shortcut( "opengl" )
 125     /* Allow opengl provider plugin selection */
 126     add_module( "opengl-provider", "opengl provider", NULL, NULL,
 127                 PROVIDER_TEXT, PROVIDER_LONGTEXT, true )
 128     set_callbacks( CreateVout, DestroyVout )
 129 vlc_module_end ()
 130
 131 /*****************************************************************************
 132  * vout_sys_t: video output method descriptor
 133  *****************************************************************************
 134  * This structure is part of the video output thread descriptor.
 135  * It describes the OpenGL specific properties of the output thread.
 136  *****************************************************************************/
 137 struct vout_sys_t
 138 {
 139     vout_thread_t *p_vout;
 140
 141     uint8_t    *pp_buffer[2];
 142     int         i_index;
 143     int         i_tex_width;
 144     int         i_tex_height;
 145     GLuint      p_textures[2];
 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     char * psz;
 156
 157     /* Allocate structure */
 158     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 159     if( p_sys == NULL )
 160         return VLC_ENOMEM;
 161
 162     p_sys->i_index = 0;
 163 #ifdef __APPLE__
 164     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 165     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 166 #else
 167     /* A texture must have a size aligned on a power of 2 */
 168     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 169     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 170 #endif
 171
 172     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 173              p_sys->i_tex_height );
 174
 175     /* Get window */
 176     p_sys->p_vout =
 177         (vout_thread_t *)vlc_object_create( p_this, sizeof( vout_thread_t ) );
 178     if( p_sys->p_vout == NULL )
 179     {
 180         free( p_sys );
 181         return VLC_ENOMEM;
 182     }
 183     vlc_object_attach( p_sys->p_vout, p_this );
 184
 185     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 186     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 187     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 188     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 189     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 190     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 191     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 192     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 193     p_sys->p_vout->b_autoscale = p_vout->b_autoscale;
 194     p_sys->p_vout->i_zoom = p_vout->i_zoom;
 195     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 196     var_Create( p_sys->p_vout, "video-deco",
 197                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 198
 199     /* Forward events from the opengl provider */
 200     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 201     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 202     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 203     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_BOOL );
 204     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 205     var_Create( p_sys->p_vout, "video-on-top",
 206                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 207     var_Create( p_sys->p_vout, "autoscale",
 208                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 209     var_Create( p_sys->p_vout, "scale",
 210                 VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 211
 212     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 213     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 214     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 215     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 216     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 217     var_AddCallback( p_sys->p_vout, "video-on-top", SendEvents, p_vout );
 218     var_AddCallback( p_vout, "autoscale", SendEvents, p_sys->p_vout );
 219     var_AddCallback( p_vout, "scale", SendEvents, p_sys->p_vout );
 220
 221     psz = var_CreateGetString( p_vout, "opengl-provider" );
 222     p_sys->p_vout->p_module =
 223         module_need( p_sys->p_vout, "opengl provider", psz, false );
 224     free( psz );
 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         /* no need for var_DelCallback here :-) */
 230         vlc_object_release( p_sys->p_vout );
 231         free( p_sys );
 232         return VLC_ENOOBJ;
 233     }
 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     return VLC_SUCCESS;
 243 }
 244
 245 /*****************************************************************************
 246  * Init: initialize the OpenGL video thread output method
 247  *****************************************************************************/
 248 static int Init( vout_thread_t *p_vout )
 249 {
 250     vout_sys_t *p_sys = p_vout->p_sys;
 251     int i_pixel_pitch;
 252
 253     p_sys->p_vout->pf_init( p_sys->p_vout );
 254
 255 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 256 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 257     p_vout->output.i_chroma = VLC_CODEC_YUYV;
 258     i_pixel_pitch = 2;
 259
 260 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 261     p_vout->output.i_chroma = VLC_CODEC_UYVY;
 262     i_pixel_pitch = 2;
 263
 264 #elif VLCGL_FORMAT == GL_RGB
 265 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 266     p_vout->output.i_chroma = VLC_CODEC_RGB24;
 267 #       if defined( WORDS_BIGENDIAN )
 268     p_vout->output.i_rmask = 0x00ff0000;
 269     p_vout->output.i_gmask = 0x0000ff00;
 270     p_vout->output.i_bmask = 0x000000ff;
 271 #       else
 272     p_vout->output.i_rmask = 0x000000ff;
 273     p_vout->output.i_gmask = 0x0000ff00;
 274     p_vout->output.i_bmask = 0x00ff0000;
 275 #       endif
 276     i_pixel_pitch = 3;
 277 #   else
 278     p_vout->output.i_chroma = VLC_CODEC_RGB16;
 279 #       if defined( WORDS_BIGENDIAN )
 280     p_vout->output.i_rmask = 0x001f;
 281     p_vout->output.i_gmask = 0x07e0;
 282     p_vout->output.i_bmask = 0xf800;
 283 #       else
 284     p_vout->output.i_rmask = 0xf800;
 285     p_vout->output.i_gmask = 0x07e0;
 286     p_vout->output.i_bmask = 0x001f;
 287 #       endif
 288     i_pixel_pitch = 2;
 289 #   endif
 290 #else
 291     p_vout->output.i_chroma = VLC_CODEC_RGB32;
 292 #       if defined( WORDS_BIGENDIAN )
 293     p_vout->output.i_rmask = 0xff000000;
 294     p_vout->output.i_gmask = 0x00ff0000;
 295     p_vout->output.i_bmask = 0x0000ff00;
 296 #       else
 297     p_vout->output.i_rmask = 0x000000ff;
 298     p_vout->output.i_gmask = 0x0000ff00;
 299     p_vout->output.i_bmask = 0x00ff0000;
 300 #       endif
 301     i_pixel_pitch = 4;
 302 #endif
 303
 304     /* Since OpenGL can do rescaling for us, stick to the default
 305      * coordinates and aspect. */
 306     p_vout->output.i_width  = p_vout->render.i_width;
 307     p_vout->output.i_height = p_vout->render.i_height;
 308     p_vout->output.i_aspect = p_vout->render.i_aspect;
 309
 310     p_vout->fmt_out = p_vout->fmt_in;
 311     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 312
 313     /* We know the chroma, allocate one buffer which will be used
 314      * directly by the decoder */
 315     p_sys->pp_buffer[0] =
 316         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 317     if( !p_sys->pp_buffer[0] )
 318         return -1;
 319     p_sys->pp_buffer[1] =
 320         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 321     if( !p_sys->pp_buffer[1] )
 322         return -1;
 323
 324     p_vout->p_picture[0].i_planes = 1;
 325     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 326     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 327     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 328     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 329     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 330         p_vout->p_picture[0].p->i_pixel_pitch;
 331     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 332         p_vout->p_picture[0].p->i_pixel_pitch;
 333
 334     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 335     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 336
 337     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 338
 339     I_OUTPUTPICTURES = 1;
 340
 341     if( p_sys->p_vout->pf_lock &&
 342         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 343     {
 344         msg_Warn( p_vout, "could not lock OpenGL provider" );
 345         return 0;
 346     }
 347
 348     InitTextures( p_vout );
 349
 350     glDisable(GL_BLEND);
 351     glDisable(GL_DEPTH_TEST);
 352     glDepthMask(GL_FALSE);
 353     glDisable(GL_CULL_FACE);
 354     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 355     glClear( GL_COLOR_BUFFER_BIT );
 356
 357     if( p_sys->p_vout->pf_unlock )
 358     {
 359         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 360     }
 361
 362     return 0;
 363 }
 364
 365 /*****************************************************************************
 366  * End: terminate GLX video thread output method
 367  *****************************************************************************/
 368 static void End( vout_thread_t *p_vout )
 369 {
 370     vout_sys_t *p_sys = p_vout->p_sys;
 371
 372     if( p_sys->p_vout->pf_lock &&
 373         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 374     {
 375         msg_Warn( p_vout, "could not lock OpenGL provider" );
 376         return;
 377     }
 378
 379     glFinish();
 380     glFlush();
 381
 382     /* Free the texture buffer*/
 383     glDeleteTextures( 2, p_sys->p_textures );
 384     free( p_sys->pp_buffer[0] );
 385     free( p_sys->pp_buffer[1] );
 386
 387     if( p_sys->p_vout->pf_unlock )
 388     {
 389         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 390     }
 391 }
 392
 393 /*****************************************************************************
 394  * Destroy: destroy GLX video thread output method
 395  *****************************************************************************
 396  * Terminate an output method created by CreateVout
 397  *****************************************************************************/
 398 static void DestroyVout( vlc_object_t *p_this )
 399 {
 400     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 401     vout_sys_t *p_sys = p_vout->p_sys;
 402
 403     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 404     vlc_object_release( p_sys->p_vout );
 405
 406     free( p_sys );
 407 }
 408
 409 /*****************************************************************************
 410  * Manage: handle Sys events
 411  *****************************************************************************
 412  * This function should be called regularly by video output thread. It returns
 413  * a non null value if an error occurred.
 414  *****************************************************************************/
 415 static int Manage( vout_thread_t *p_vout )
 416 {
 417     vout_sys_t *p_sys = p_vout->p_sys;
 418     int i_ret, i_fullscreen_change;
 419
 420     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 421
 422     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 423         p_vout->fmt_in.i_x_offset;
 424     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 425         p_vout->fmt_in.i_y_offset;
 426     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 427         p_vout->fmt_in.i_visible_width;
 428     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 429         p_vout->fmt_in.i_visible_height;
 430     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 431         p_vout->fmt_in.i_aspect;
 432     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 433         p_vout->fmt_in.i_sar_num;
 434     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 435         p_vout->fmt_in.i_sar_den;
 436     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 437
 438     p_sys->p_vout->i_changes = p_vout->i_changes;
 439     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 440     p_vout->i_changes = p_sys->p_vout->i_changes;
 441
 442 #ifdef __APPLE__
 443     if( p_sys->p_vout->pf_lock &&
 444         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 445     {
 446         msg_Warn( p_vout, "could not lock OpenGL provider" );
 447         return i_ret;
 448     }
 449
 450     /* On OS X, we create the window and the GL view when entering
 451        fullscreen - the textures have to be inited again */
 452     if( i_fullscreen_change )
 453     {
 454         InitTextures( p_vout );
 455     }
 456
 457     if( p_sys->p_vout->pf_unlock )
 458     {
 459         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 460     }
 461 #endif
 462 // to align in real time in OPENGL
 463     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 464     {
 465         p_vout->i_changes |= VOUT_CROP_CHANGE;        //to force change
 466         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 467     }
 468
 469     /* forward signal that autoscale toggle has changed */
 470     if (p_vout->i_changes & VOUT_SCALE_CHANGE )
 471     {
 472         p_vout->i_changes &= ~VOUT_SCALE_CHANGE;
 473
 474         p_sys->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 475     }
 476
 477     /* forward signal that scale has changed */
 478     if (p_vout->i_changes & VOUT_ZOOM_CHANGE )
 479     {
 480         p_vout->i_changes &= ~VOUT_ZOOM_CHANGE;
 481
 482         p_sys->p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 483     }
 484
 485
 486     return i_ret;
 487 }
 488
 489 /*****************************************************************************
 490  * Render: render previously calculated output
 491  *****************************************************************************/
 492 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 493 {
 494     VLC_UNUSED(p_pic);
 495     vout_sys_t *p_sys = p_vout->p_sys;
 496
 497     /* On Win32/GLX, we do this the usual way:
 498        + Fill the buffer with new content,
 499        + Reload the texture,
 500        + Use the texture.
 501
 502        On OS X with VRAM or AGP texturing, the order has to be:
 503        + Reload the texture,
 504        + Fill the buffer with new content,
 505        + Use the texture.
 506
 507        (Thanks to gcc from the Arstechnica forums for the tip)
 508
 509        Therefore, we have to use two buffers and textures. On Win32/GLX,
 510        we reload the texture to be displayed and use it right away. On
 511        OS X, we first render, then reload the texture to be used next
 512        time. */
 513
 514     if( p_sys->p_vout->pf_lock &&
 515         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 516     {
 517         msg_Warn( p_vout, "could not lock OpenGL provider" );
 518         return;
 519     }
 520
 521 #ifdef __APPLE__
 522     int i_new_index;
 523     i_new_index = ( p_sys->i_index + 1 ) & 1;
 524
 525
 526     /* Update the texture */
 527     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 528     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 529                      p_vout->fmt_out.i_width,
 530                      p_vout->fmt_out.i_height,
 531                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 532
 533     /* Bind to the previous texture for drawing */
 534     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 535
 536     /* Switch buffers */
 537     p_sys->i_index = i_new_index;
 538     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 539
 540 #else
 541     /* Update the texture */
 542     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 543                      p_vout->fmt_out.i_width,
 544                      p_vout->fmt_out.i_height,
 545                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 546 #endif
 547
 548     if( p_sys->p_vout->pf_unlock )
 549     {
 550         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 551     }
 552 }
 553
 554 /*****************************************************************************
 555  * DisplayVideo: displays previously rendered output
 556  *****************************************************************************/
 557 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 558 {
 559     VLC_UNUSED(p_pic);
 560     vout_sys_t *p_sys = p_vout->p_sys;
 561     float f_width, f_height, f_x, f_y;
 562
 563     if( p_sys->p_vout->pf_lock &&
 564         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 565     {
 566         msg_Warn( p_vout, "could not lock OpenGL provider" );
 567         return;
 568     }
 569
 570     /* glTexCoord works differently with GL_TEXTURE_2D and
 571        GL_TEXTURE_RECTANGLE_EXT */
 572 #ifdef __APPLE__
 573     f_x = (float)p_vout->fmt_out.i_x_offset;
 574     f_y = (float)p_vout->fmt_out.i_y_offset;
 575     f_width = (float)p_vout->fmt_out.i_x_offset +
 576               (float)p_vout->fmt_out.i_visible_width;
 577     f_height = (float)p_vout->fmt_out.i_y_offset +
 578                (float)p_vout->fmt_out.i_visible_height;
 579 #else
 580     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 581     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 582     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 583                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 584     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 585                  p_vout->fmt_out.i_visible_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     glEnable( VLCGL_TARGET );
 595     glBegin( GL_POLYGON );
 596     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 597     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 598     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 599     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 600     glEnd();
 601
 602     glDisable( VLCGL_TARGET );
 603
 604     p_sys->p_vout->pf_swap( p_sys->p_vout );
 605
 606     if( p_sys->p_vout->pf_unlock )
 607     {
 608         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 609     }
 610 }
 611
 612 int GetAlignedSize( int i_size )
 613 {
 614     /* Return the nearest power of 2 */
 615     int i_result = 1;
 616     while( i_result < i_size )
 617     {
 618         i_result *= 2;
 619     }
 620     return i_result;
 621 }
 622
 623 /*****************************************************************************
 624  * Control: control facility for the vout
 625  *****************************************************************************/
 626 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 627 {
 628     vout_sys_t *p_sys = p_vout->p_sys;
 629
 630     if( p_sys->p_vout->pf_control )
 631         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 632     return VLC_EGENERIC;
 633 }
 634
 635 static int InitTextures( vout_thread_t *p_vout )
 636 {
 637     vout_sys_t *p_sys = p_vout->p_sys;
 638     int i_index;
 639
 640     glDeleteTextures( 2, p_sys->p_textures );
 641     glGenTextures( 2, p_sys->p_textures );
 642
 643     for( i_index = 0; i_index < 2; i_index++ )
 644     {
 645         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 646
 647         /* Set the texture parameters */
 648         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 649
 650         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 651         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 652
 653         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 654         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 655
 656         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 657
 658 #ifdef __APPLE__
 659         /* Tell the driver not to make a copy of the texture but to use
 660            our buffer */
 661         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 662         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 663
 664 #if 0
 665         /* Use VRAM texturing */
 666         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 667                          GL_STORAGE_CACHED_APPLE );
 668 #else
 669         /* Use AGP texturing */
 670         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 671                          GL_STORAGE_SHARED_APPLE );
 672 #endif
 673 #endif
 674
 675         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 676         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 677                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 678                       p_sys->pp_buffer[i_index] );
 679     }
 680
 681     return 0;
 682 }
 683
 684 /*****************************************************************************
 685  * SendEvents: forward mouse and keyboard events to the parent p_vout
 686  *****************************************************************************/
 687 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 688                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 689 {
 690     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 691     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 692 }