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_string( "opengl-provider", "default", NULL, PROVIDER_TEXT,
 127                     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_scale = p_vout->b_scale;
 194     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 195
 196     psz = config_GetPsz( p_vout, "opengl-provider" );
 197
 198     msg_Dbg( p_vout, "requesting \"%s\" opengl provider",
 199                       psz ? psz : "default" );
 200
 201     p_sys->p_vout->p_module =
 202         module_need( p_sys->p_vout, "opengl provider", psz, false );
 203     free( psz );
 204     if( p_sys->p_vout->p_module == NULL )
 205     {
 206         msg_Warn( p_vout, "No OpenGL provider found" );
 207         vlc_object_detach( p_sys->p_vout );
 208         vlc_object_release( p_sys->p_vout );
 209         return VLC_ENOOBJ;
 210     }
 211
 212     p_vout->pf_init = Init;
 213     p_vout->pf_end = End;
 214     p_vout->pf_manage = Manage;
 215     p_vout->pf_render = Render;
 216     p_vout->pf_display = DisplayVideo;
 217     p_vout->pf_control = Control;
 218
 219     /* Forward events from the opengl provider */
 220     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 221     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 222     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 223     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_BOOL );
 224     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 225     var_Create( p_sys->p_vout, "video-on-top",
 226                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 227
 228     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 229     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 230     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 231     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 232     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 233
 234     return VLC_SUCCESS;
 235 }
 236
 237 /*****************************************************************************
 238  * Init: initialize the OpenGL video thread output method
 239  *****************************************************************************/
 240 static int Init( vout_thread_t *p_vout )
 241 {
 242     vout_sys_t *p_sys = p_vout->p_sys;
 243     int i_pixel_pitch;
 244
 245     p_sys->p_vout->pf_init( p_sys->p_vout );
 246
 247 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 248 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 249     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 250     i_pixel_pitch = 2;
 251
 252 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 253     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 254     i_pixel_pitch = 2;
 255
 256 #elif VLCGL_FORMAT == GL_RGB
 257 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 258     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 259 #       if defined( WORDS_BIGENDIAN )
 260     p_vout->output.i_rmask = 0x00ff0000;
 261     p_vout->output.i_gmask = 0x0000ff00;
 262     p_vout->output.i_bmask = 0x000000ff;
 263 #       else
 264     p_vout->output.i_rmask = 0x000000ff;
 265     p_vout->output.i_gmask = 0x0000ff00;
 266     p_vout->output.i_bmask = 0x00ff0000;
 267 #       endif
 268     i_pixel_pitch = 3;
 269 #   else
 270     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 271 #       if defined( WORDS_BIGENDIAN )
 272     p_vout->output.i_rmask = 0x001f;
 273     p_vout->output.i_gmask = 0x07e0;
 274     p_vout->output.i_bmask = 0xf800;
 275 #       else
 276     p_vout->output.i_rmask = 0xf800;
 277     p_vout->output.i_gmask = 0x07e0;
 278     p_vout->output.i_bmask = 0x001f;
 279 #       endif
 280     i_pixel_pitch = 2;
 281 #   endif
 282 #else
 283     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 284 #       if defined( WORDS_BIGENDIAN )
 285     p_vout->output.i_rmask = 0xff000000;
 286     p_vout->output.i_gmask = 0x00ff0000;
 287     p_vout->output.i_bmask = 0x0000ff00;
 288 #       else
 289     p_vout->output.i_rmask = 0x000000ff;
 290     p_vout->output.i_gmask = 0x0000ff00;
 291     p_vout->output.i_bmask = 0x00ff0000;
 292 #       endif
 293     i_pixel_pitch = 4;
 294 #endif
 295
 296     /* Since OpenGL can do rescaling for us, stick to the default
 297      * coordinates and aspect. */
 298     p_vout->output.i_width  = p_vout->render.i_width;
 299     p_vout->output.i_height = p_vout->render.i_height;
 300     p_vout->output.i_aspect = p_vout->render.i_aspect;
 301
 302     p_vout->fmt_out = p_vout->fmt_in;
 303     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 304
 305     /* We know the chroma, allocate one buffer which will be used
 306      * directly by the decoder */
 307     p_sys->pp_buffer[0] =
 308         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 309     if( !p_sys->pp_buffer[0] )
 310         return -1;
 311     p_sys->pp_buffer[1] =
 312         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 313     if( !p_sys->pp_buffer[1] )
 314         return -1;
 315
 316     p_vout->p_picture[0].i_planes = 1;
 317     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 318     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 319     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 320     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 321     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 322         p_vout->p_picture[0].p->i_pixel_pitch;
 323     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 324         p_vout->p_picture[0].p->i_pixel_pitch;
 325
 326     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 327     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 328
 329     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 330
 331     I_OUTPUTPICTURES = 1;
 332
 333     if( p_sys->p_vout->pf_lock &&
 334         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 335     {
 336         msg_Warn( p_vout, "could not lock OpenGL provider" );
 337         return 0;
 338     }
 339
 340     InitTextures( p_vout );
 341
 342     glDisable(GL_BLEND);
 343     glDisable(GL_DEPTH_TEST);
 344     glDepthMask(GL_FALSE);
 345     glDisable(GL_CULL_FACE);
 346     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 347     glClear( GL_COLOR_BUFFER_BIT );
 348
 349     if( p_sys->p_vout->pf_unlock )
 350     {
 351         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 352     }
 353
 354     return 0;
 355 }
 356
 357 /*****************************************************************************
 358  * End: terminate GLX video thread output method
 359  *****************************************************************************/
 360 static void End( vout_thread_t *p_vout )
 361 {
 362     vout_sys_t *p_sys = p_vout->p_sys;
 363
 364     if( p_sys->p_vout->pf_lock &&
 365         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 366     {
 367         msg_Warn( p_vout, "could not lock OpenGL provider" );
 368         return;
 369     }
 370
 371     glFinish();
 372     glFlush();
 373
 374     /* Free the texture buffer*/
 375     glDeleteTextures( 2, p_sys->p_textures );
 376     free( p_sys->pp_buffer[0] );
 377     free( p_sys->pp_buffer[1] );
 378
 379     if( p_sys->p_vout->pf_unlock )
 380     {
 381         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 382     }
 383 }
 384
 385 /*****************************************************************************
 386  * Destroy: destroy GLX video thread output method
 387  *****************************************************************************
 388  * Terminate an output method created by CreateVout
 389  *****************************************************************************/
 390 static void DestroyVout( vlc_object_t *p_this )
 391 {
 392     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 393     vout_sys_t *p_sys = p_vout->p_sys;
 394
 395     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 396     vlc_object_release( p_sys->p_vout );
 397
 398     free( p_sys );
 399 }
 400
 401 /*****************************************************************************
 402  * Manage: handle Sys events
 403  *****************************************************************************
 404  * This function should be called regularly by video output thread. It returns
 405  * a non null value if an error occurred.
 406  *****************************************************************************/
 407 static int Manage( vout_thread_t *p_vout )
 408 {
 409     vout_sys_t *p_sys = p_vout->p_sys;
 410     int i_ret, i_fullscreen_change;
 411
 412     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 413
 414     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 415         p_vout->fmt_in.i_x_offset;
 416     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 417         p_vout->fmt_in.i_y_offset;
 418     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 419         p_vout->fmt_in.i_visible_width;
 420     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 421         p_vout->fmt_in.i_visible_height;
 422     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 423         p_vout->fmt_in.i_aspect;
 424     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 425         p_vout->fmt_in.i_sar_num;
 426     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 427         p_vout->fmt_in.i_sar_den;
 428     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 429
 430     p_sys->p_vout->i_changes = p_vout->i_changes;
 431     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 432     p_vout->i_changes = p_sys->p_vout->i_changes;
 433
 434 #ifdef __APPLE__
 435     if( p_sys->p_vout->pf_lock &&
 436         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 437     {
 438         msg_Warn( p_vout, "could not lock OpenGL provider" );
 439         return i_ret;
 440     }
 441
 442     /* On OS X, we create the window and the GL view when entering
 443        fullscreen - the textures have to be inited again */
 444     if( i_fullscreen_change )
 445     {
 446         InitTextures( p_vout );
 447     }
 448
 449     if( p_sys->p_vout->pf_unlock )
 450     {
 451         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 452     }
 453 #endif
 454 // to align in real time in OPENGL
 455     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 456     {
 457         p_vout->i_changes = VOUT_CROP_CHANGE;        //to force change
 458         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 459     }
 460     return i_ret;
 461 }
 462
 463 /*****************************************************************************
 464  * Render: render previously calculated output
 465  *****************************************************************************/
 466 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 467 {
 468     VLC_UNUSED(p_pic);
 469     vout_sys_t *p_sys = p_vout->p_sys;
 470
 471     /* On Win32/GLX, we do this the usual way:
 472        + Fill the buffer with new content,
 473        + Reload the texture,
 474        + Use the texture.
 475
 476        On OS X with VRAM or AGP texturing, the order has to be:
 477        + Reload the texture,
 478        + Fill the buffer with new content,
 479        + Use the texture.
 480
 481        (Thanks to gcc from the Arstechnica forums for the tip)
 482
 483        Therefore, we have to use two buffers and textures. On Win32/GLX,
 484        we reload the texture to be displayed and use it right away. On
 485        OS X, we first render, then reload the texture to be used next
 486        time. */
 487
 488     if( p_sys->p_vout->pf_lock &&
 489         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 490     {
 491         msg_Warn( p_vout, "could not lock OpenGL provider" );
 492         return;
 493     }
 494
 495 #ifdef __APPLE__
 496     int i_new_index;
 497     i_new_index = ( p_sys->i_index + 1 ) & 1;
 498
 499
 500     /* Update the texture */
 501     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 502     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 503                      p_vout->fmt_out.i_width,
 504                      p_vout->fmt_out.i_height,
 505                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 506
 507     /* Bind to the previous texture for drawing */
 508     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 509
 510     /* Switch buffers */
 511     p_sys->i_index = i_new_index;
 512     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 513
 514 #else
 515     /* Update the texture */
 516     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 517                      p_vout->fmt_out.i_width,
 518                      p_vout->fmt_out.i_height,
 519                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 520 #endif
 521
 522     if( p_sys->p_vout->pf_unlock )
 523     {
 524         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 525     }
 526 }
 527
 528 /*****************************************************************************
 529  * DisplayVideo: displays previously rendered output
 530  *****************************************************************************/
 531 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 532 {
 533     VLC_UNUSED(p_pic);
 534     vout_sys_t *p_sys = p_vout->p_sys;
 535     float f_width, f_height, f_x, f_y;
 536
 537     if( p_sys->p_vout->pf_lock &&
 538         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 539     {
 540         msg_Warn( p_vout, "could not lock OpenGL provider" );
 541         return;
 542     }
 543
 544     /* glTexCoord works differently with GL_TEXTURE_2D and
 545        GL_TEXTURE_RECTANGLE_EXT */
 546 #ifdef __APPLE__
 547     f_x = (float)p_vout->fmt_out.i_x_offset;
 548     f_y = (float)p_vout->fmt_out.i_y_offset;
 549     f_width = (float)p_vout->fmt_out.i_x_offset +
 550               (float)p_vout->fmt_out.i_visible_width;
 551     f_height = (float)p_vout->fmt_out.i_y_offset +
 552                (float)p_vout->fmt_out.i_visible_height;
 553 #else
 554     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 555     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 556     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 557                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 558     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 559                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 560 #endif
 561
 562     /* Why drawing here and not in Render()? Because this way, the
 563        OpenGL providers can call pf_display to force redraw. Currently,
 564        the OS X provider uses it to get a smooth window resizing */
 565
 566     glClear( GL_COLOR_BUFFER_BIT );
 567
 568     glEnable( VLCGL_TARGET );
 569     glBegin( GL_POLYGON );
 570     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 571     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 572     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 573     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 574     glEnd();
 575
 576     glDisable( VLCGL_TARGET );
 577
 578     p_sys->p_vout->pf_swap( p_sys->p_vout );
 579
 580     if( p_sys->p_vout->pf_unlock )
 581     {
 582         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 583     }
 584 }
 585
 586 int GetAlignedSize( int i_size )
 587 {
 588     /* Return the nearest power of 2 */
 589     int i_result = 1;
 590     while( i_result < i_size )
 591     {
 592         i_result *= 2;
 593     }
 594     return i_result;
 595 }
 596
 597 /*****************************************************************************
 598  * Control: control facility for the vout
 599  *****************************************************************************/
 600 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 601 {
 602     vout_sys_t *p_sys = p_vout->p_sys;
 603
 604     switch( i_query )
 605     {
 606     case VOUT_SNAPSHOT:
 607         return vout_vaControlDefault( p_vout, i_query, args );
 608
 609     default:
 610         if( p_sys->p_vout->pf_control )
 611             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 612         else
 613             return vout_vaControlDefault( p_vout, i_query, args );
 614     }
 615 }
 616
 617 static int InitTextures( vout_thread_t *p_vout )
 618 {
 619     vout_sys_t *p_sys = p_vout->p_sys;
 620     int i_index;
 621
 622     glDeleteTextures( 2, p_sys->p_textures );
 623     glGenTextures( 2, p_sys->p_textures );
 624
 625     for( i_index = 0; i_index < 2; i_index++ )
 626     {
 627         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 628
 629         /* Set the texture parameters */
 630         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 631
 632         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 633         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 634
 635         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 636         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 637
 638         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 639
 640 #ifdef __APPLE__
 641         /* Tell the driver not to make a copy of the texture but to use
 642            our buffer */
 643         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 644         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 645
 646 #if 0
 647         /* Use VRAM texturing */
 648         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 649                          GL_STORAGE_CACHED_APPLE );
 650 #else
 651         /* Use AGP texturing */
 652         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 653                          GL_STORAGE_SHARED_APPLE );
 654 #endif
 655 #endif
 656
 657         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 658         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 659                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 660                       p_sys->pp_buffer[i_index] );
 661     }
 662
 663     return 0;
 664 }
 665
 666 /*****************************************************************************
 667  * SendEvents: forward mouse and keyboard events to the parent p_vout
 668  *****************************************************************************/
 669 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 670                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 671 {
 672     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 673     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 674 }