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 #else
  45 # include <GL/gl.h>
  46 #endif
  47
  48 #ifndef YCBCR_MESA
  49 # define YCBCR_MESA 0x8757
  50 #endif
  51 #ifndef UNSIGNED_SHORT_8_8_MESA
  52 # define UNSIGNED_SHORT_8_8_MESA 0x85BA
  53 #endif
  54 /* RV16 */
  55 #ifndef GL_UNSIGNED_SHORT_5_6_5
  56 # define GL_UNSIGNED_SHORT_5_6_5 0x8363
  57 #endif
  58 #ifndef GL_CLAMP_TO_EDGE
  59 # define GL_CLAMP_TO_EDGE 0x812F
  60 #endif
  61
  62 #ifdef __APPLE__
  63 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  64    This allows sizes which are not powers of 2 */
  65 # define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  66
  67 /* OS X OpenGL supports YUV. Hehe. */
  68 # define VLCGL_FORMAT GL_YCBCR_422_APPLE
  69 # define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  70 #else
  71
  72 # define VLCGL_TARGET GL_TEXTURE_2D
  73
  74 /* RV32 */
  75 # define VLCGL_RGB_FORMAT GL_RGBA
  76 # define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  77
  78 /* YUY2 */
  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 #endif
  86
  87
  88 /*****************************************************************************
  89  * Vout interface
  90  *****************************************************************************/
  91 static int  CreateVout   ( vlc_object_t * );
  92 static void DestroyVout  ( vlc_object_t * );
  93 static int  Init         ( vout_thread_t * );
  94 static void End          ( vout_thread_t * );
  95 static int  Manage       ( vout_thread_t * );
  96 static void Render       ( vout_thread_t *, picture_t * );
  97 static void DisplayVideo ( vout_thread_t *, picture_t * );
  98 static int  Control      ( vout_thread_t *, int, va_list );
  99
 100 static inline int GetAlignedSize( int );
 101
 102 static int InitTextures  ( vout_thread_t * );
 103 static int SendEvents    ( vlc_object_t *, char const *,
 104                            vlc_value_t, vlc_value_t, void * );
 105
 106 #define PROVIDER_TEXT N_("OpenGL Provider")
 107 #define PROVIDER_LONGTEXT N_("Allows you to modify what OpenGL provider should be used")
 108
 109 vlc_module_begin ()
 110     set_shortname( "OpenGL" )
 111     set_category( CAT_VIDEO )
 112     set_subcategory( SUBCAT_VIDEO_VOUT )
 113     set_description( N_("OpenGL video output") )
 114 #ifdef __APPLE__
 115     set_capability( "video output", 200 )
 116 #else
 117     set_capability( "video output", 20 )
 118 #endif
 119     add_shortcut( "opengl" )
 120     /* Allow opengl provider plugin selection */
 121     add_module( "opengl-provider", "opengl provider", NULL, NULL,
 122                 PROVIDER_TEXT, PROVIDER_LONGTEXT, true )
 123     set_callbacks( CreateVout, DestroyVout )
 124 vlc_module_end ()
 125
 126 /*****************************************************************************
 127  * vout_sys_t: video output method descriptor
 128  *****************************************************************************
 129  * This structure is part of the video output thread descriptor.
 130  * It describes the OpenGL specific properties of the output thread.
 131  *****************************************************************************/
 132 struct vout_sys_t
 133 {
 134     vout_thread_t *p_vout;
 135
 136     uint8_t    *pp_buffer[2];
 137     int         i_index;
 138     int         i_tex_width;
 139     int         i_tex_height;
 140     GLuint      p_textures[2];
 141 };
 142
 143 /*****************************************************************************
 144  * CreateVout: This function allocates and initializes the OpenGL vout method.
 145  *****************************************************************************/
 146 static int CreateVout( vlc_object_t *p_this )
 147 {
 148     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 149     vout_sys_t *p_sys;
 150     char * psz;
 151
 152     /* Allocate structure */
 153     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 154     if( p_sys == NULL )
 155         return VLC_ENOMEM;
 156
 157     p_sys->i_index = 0;
 158 #ifdef __APPLE__
 159     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 160     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 161 #else
 162     /* A texture must have a size aligned on a power of 2 */
 163     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 164     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 165 #endif
 166
 167     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 168              p_sys->i_tex_height );
 169
 170     /* Get window */
 171     p_sys->p_vout =
 172         (vout_thread_t *)vlc_object_create( p_this, sizeof( vout_thread_t ) );
 173     if( p_sys->p_vout == NULL )
 174     {
 175         free( p_sys );
 176         return VLC_ENOMEM;
 177     }
 178     vlc_object_attach( p_sys->p_vout, p_this );
 179
 180     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 181     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 182     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 183     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 184     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 185     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 186     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 187     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 188     p_sys->p_vout->b_autoscale = p_vout->b_autoscale;
 189     p_sys->p_vout->i_zoom = p_vout->i_zoom;
 190     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 191     var_Create( p_sys->p_vout, "video-deco",
 192                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 193
 194     /* Forward events from the opengl provider */
 195     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 196     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 197     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 198     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_BOOL );
 199     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 200     var_Create( p_sys->p_vout, "video-on-top",
 201                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 202     var_Create( p_sys->p_vout, "autoscale",
 203                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 204     var_Create( p_sys->p_vout, "scale",
 205                 VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 206
 207     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 208     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 209     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 210     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 211     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 212     var_AddCallback( p_sys->p_vout, "video-on-top", SendEvents, p_vout );
 213     var_AddCallback( p_vout, "autoscale", SendEvents, p_sys->p_vout );
 214     var_AddCallback( p_vout, "scale", SendEvents, p_sys->p_vout );
 215
 216     psz = var_CreateGetString( p_vout, "opengl-provider" );
 217     p_sys->p_vout->p_module =
 218         module_need( p_sys->p_vout, "opengl provider", psz, false );
 219     free( psz );
 220     if( p_sys->p_vout->p_module == NULL )
 221     {
 222         msg_Warn( p_vout, "No OpenGL provider found" );
 223         vlc_object_detach( p_sys->p_vout );
 224         /* no need for var_DelCallback here :-) */
 225         vlc_object_release( p_sys->p_vout );
 226         free( p_sys );
 227         return VLC_ENOOBJ;
 228     }
 229
 230     p_vout->pf_init = Init;
 231     p_vout->pf_end = End;
 232     p_vout->pf_manage = Manage;
 233     p_vout->pf_render = Render;
 234     p_vout->pf_display = DisplayVideo;
 235     p_vout->pf_control = Control;
 236
 237     return VLC_SUCCESS;
 238 }
 239
 240 /*****************************************************************************
 241  * Init: initialize the OpenGL video thread output method
 242  *****************************************************************************/
 243 static int Init( vout_thread_t *p_vout )
 244 {
 245     vout_sys_t *p_sys = p_vout->p_sys;
 246     int i_pixel_pitch;
 247
 248     p_sys->p_vout->pf_init( p_sys->p_vout );
 249
 250 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 251 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 252     p_vout->output.i_chroma = VLC_CODEC_YUYV;
 253     i_pixel_pitch = 2;
 254
 255 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 256     p_vout->output.i_chroma = VLC_CODEC_UYVY;
 257     i_pixel_pitch = 2;
 258
 259 #elif VLCGL_FORMAT == GL_RGB
 260 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 261     p_vout->output.i_chroma = VLC_CODEC_RGB24;
 262 #       if defined( WORDS_BIGENDIAN )
 263     p_vout->output.i_rmask = 0x00ff0000;
 264     p_vout->output.i_gmask = 0x0000ff00;
 265     p_vout->output.i_bmask = 0x000000ff;
 266 #       else
 267     p_vout->output.i_rmask = 0x000000ff;
 268     p_vout->output.i_gmask = 0x0000ff00;
 269     p_vout->output.i_bmask = 0x00ff0000;
 270 #       endif
 271     i_pixel_pitch = 3;
 272 #   else
 273     p_vout->output.i_chroma = VLC_CODEC_RGB16;
 274 #       if defined( WORDS_BIGENDIAN )
 275     p_vout->output.i_rmask = 0x001f;
 276     p_vout->output.i_gmask = 0x07e0;
 277     p_vout->output.i_bmask = 0xf800;
 278 #       else
 279     p_vout->output.i_rmask = 0xf800;
 280     p_vout->output.i_gmask = 0x07e0;
 281     p_vout->output.i_bmask = 0x001f;
 282 #       endif
 283     i_pixel_pitch = 2;
 284 #   endif
 285 #else
 286     p_vout->output.i_chroma = VLC_CODEC_RGB32;
 287 #       if defined( WORDS_BIGENDIAN )
 288     p_vout->output.i_rmask = 0xff000000;
 289     p_vout->output.i_gmask = 0x00ff0000;
 290     p_vout->output.i_bmask = 0x0000ff00;
 291 #       else
 292     p_vout->output.i_rmask = 0x000000ff;
 293     p_vout->output.i_gmask = 0x0000ff00;
 294     p_vout->output.i_bmask = 0x00ff0000;
 295 #       endif
 296     i_pixel_pitch = 4;
 297 #endif
 298
 299     /* Since OpenGL can do rescaling for us, stick to the default
 300      * coordinates and aspect. */
 301     p_vout->output.i_width  = p_vout->render.i_width;
 302     p_vout->output.i_height = p_vout->render.i_height;
 303     p_vout->output.i_aspect = p_vout->render.i_aspect;
 304
 305     p_vout->fmt_out = p_vout->fmt_in;
 306     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 307
 308     /* We know the chroma, allocate one buffer which will be used
 309      * directly by the decoder */
 310     p_sys->pp_buffer[0] =
 311         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 312     if( !p_sys->pp_buffer[0] )
 313         return -1;
 314     p_sys->pp_buffer[1] =
 315         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 316     if( !p_sys->pp_buffer[1] )
 317         return -1;
 318
 319     p_vout->p_picture[0].i_planes = 1;
 320     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 321     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 322     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 323     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 324     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 325         p_vout->p_picture[0].p->i_pixel_pitch;
 326     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 327         p_vout->p_picture[0].p->i_pixel_pitch;
 328
 329     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 330     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 331
 332     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 333
 334     I_OUTPUTPICTURES = 1;
 335
 336     if( p_sys->p_vout->pf_lock &&
 337         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 338     {
 339         msg_Warn( p_vout, "could not lock OpenGL provider" );
 340         return 0;
 341     }
 342
 343     InitTextures( p_vout );
 344
 345     glDisable(GL_BLEND);
 346     glDisable(GL_DEPTH_TEST);
 347     glDepthMask(GL_FALSE);
 348     glDisable(GL_CULL_FACE);
 349     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 350     glClear( GL_COLOR_BUFFER_BIT );
 351
 352     if( p_sys->p_vout->pf_unlock )
 353     {
 354         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 355     }
 356
 357     return 0;
 358 }
 359
 360 /*****************************************************************************
 361  * End: terminate GLX video thread output method
 362  *****************************************************************************/
 363 static void End( vout_thread_t *p_vout )
 364 {
 365     vout_sys_t *p_sys = p_vout->p_sys;
 366
 367     if( p_sys->p_vout->pf_lock &&
 368         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 369     {
 370         msg_Warn( p_vout, "could not lock OpenGL provider" );
 371         return;
 372     }
 373
 374     glFinish();
 375     glFlush();
 376
 377     /* Free the texture buffer*/
 378     glDeleteTextures( 2, p_sys->p_textures );
 379     free( p_sys->pp_buffer[0] );
 380     free( p_sys->pp_buffer[1] );
 381
 382     if( p_sys->p_vout->pf_unlock )
 383     {
 384         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 385     }
 386
 387     /* We must release the opengl provider here: opengl requiere init and end
 388        to be done in the same thread */
 389     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 390     vlc_object_release( p_sys->p_vout );
 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     free( p_sys );
 404 }
 405
 406 /*****************************************************************************
 407  * Manage: handle Sys events
 408  *****************************************************************************
 409  * This function should be called regularly by video output thread. It returns
 410  * a non null value if an error occurred.
 411  *****************************************************************************/
 412 static int Manage( vout_thread_t *p_vout )
 413 {
 414     vout_sys_t *p_sys = p_vout->p_sys;
 415     int i_ret, i_fullscreen_change;
 416
 417     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 418
 419     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 420         p_vout->fmt_in.i_x_offset;
 421     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 422         p_vout->fmt_in.i_y_offset;
 423     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 424         p_vout->fmt_in.i_visible_width;
 425     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 426         p_vout->fmt_in.i_visible_height;
 427     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 428         p_vout->fmt_in.i_aspect;
 429     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 430         p_vout->fmt_in.i_sar_num;
 431     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 432         p_vout->fmt_in.i_sar_den;
 433     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 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 __APPLE__
 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
 454     if( p_sys->p_vout->pf_unlock )
 455     {
 456         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 457     }
 458 #endif
 459 // to align in real time in OPENGL
 460     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 461     {
 462         p_vout->i_changes |= VOUT_CROP_CHANGE;        //to force change
 463         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 464     }
 465
 466     /* forward signal that autoscale toggle has changed */
 467     if (p_vout->i_changes & VOUT_SCALE_CHANGE )
 468     {
 469         p_vout->i_changes &= ~VOUT_SCALE_CHANGE;
 470
 471         p_sys->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 472     }
 473
 474     /* forward signal that scale has changed */
 475     if (p_vout->i_changes & VOUT_ZOOM_CHANGE )
 476     {
 477         p_vout->i_changes &= ~VOUT_ZOOM_CHANGE;
 478
 479         p_sys->p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 480     }
 481
 482
 483     return i_ret;
 484 }
 485
 486 /*****************************************************************************
 487  * Render: render previously calculated output
 488  *****************************************************************************/
 489 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 490 {
 491     VLC_UNUSED(p_pic);
 492     vout_sys_t *p_sys = p_vout->p_sys;
 493
 494     /* On Win32/GLX, we do this the usual way:
 495        + Fill the buffer with new content,
 496        + Reload the texture,
 497        + Use the texture.
 498
 499        On OS X with VRAM or AGP texturing, the order has to be:
 500        + Reload the texture,
 501        + Fill the buffer with new content,
 502        + Use the texture.
 503
 504        (Thanks to gcc from the Arstechnica forums for the tip)
 505
 506        Therefore, we have to use two buffers and textures. On Win32/GLX,
 507        we reload the texture to be displayed and use it right away. On
 508        OS X, we first render, then reload the texture to be used next
 509        time. */
 510
 511     if( p_sys->p_vout->pf_lock &&
 512         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 513     {
 514         msg_Warn( p_vout, "could not lock OpenGL provider" );
 515         return;
 516     }
 517
 518 #ifdef __APPLE__
 519     int i_new_index;
 520     i_new_index = ( p_sys->i_index + 1 ) & 1;
 521
 522
 523     /* Update the texture */
 524     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 525     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 526                      p_vout->fmt_out.i_width,
 527                      p_vout->fmt_out.i_height,
 528                      VLCGL_FORMAT, VLCGL_TYPE, 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->fmt_out.i_width,
 541                      p_vout->fmt_out.i_height,
 542                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 543 #endif
 544
 545     if( p_sys->p_vout->pf_unlock )
 546     {
 547         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 548     }
 549 }
 550
 551 /*****************************************************************************
 552  * DisplayVideo: displays previously rendered output
 553  *****************************************************************************/
 554 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 555 {
 556     VLC_UNUSED(p_pic);
 557     vout_sys_t *p_sys = p_vout->p_sys;
 558     float f_width, f_height, f_x, f_y;
 559
 560     if( p_sys->p_vout->pf_lock &&
 561         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 562     {
 563         msg_Warn( p_vout, "could not lock OpenGL provider" );
 564         return;
 565     }
 566
 567     /* glTexCoord works differently with GL_TEXTURE_2D and
 568        GL_TEXTURE_RECTANGLE_EXT */
 569 #ifdef __APPLE__
 570     f_x = (float)p_vout->fmt_out.i_x_offset;
 571     f_y = (float)p_vout->fmt_out.i_y_offset;
 572     f_width = (float)p_vout->fmt_out.i_x_offset +
 573               (float)p_vout->fmt_out.i_visible_width;
 574     f_height = (float)p_vout->fmt_out.i_y_offset +
 575                (float)p_vout->fmt_out.i_visible_height;
 576 #else
 577     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 578     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 579     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 580                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 581     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 582                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 583 #endif
 584
 585     /* Why drawing here and not in Render()? Because this way, the
 586        OpenGL providers can call pf_display to force redraw. Currently,
 587        the OS X provider uses it to get a smooth window resizing */
 588
 589     glClear( GL_COLOR_BUFFER_BIT );
 590
 591     glEnable( VLCGL_TARGET );
 592     glBegin( GL_POLYGON );
 593     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 594     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 595     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 596     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 597     glEnd();
 598
 599     glDisable( VLCGL_TARGET );
 600
 601     p_sys->p_vout->pf_swap( p_sys->p_vout );
 602
 603     if( p_sys->p_vout->pf_unlock )
 604     {
 605         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 606     }
 607 }
 608
 609 int GetAlignedSize( int i_size )
 610 {
 611     /* Return the nearest power of 2 */
 612     int i_result = 1;
 613     while( i_result < i_size )
 614     {
 615         i_result *= 2;
 616     }
 617     return i_result;
 618 }
 619
 620 /*****************************************************************************
 621  * Control: control facility for the vout
 622  *****************************************************************************/
 623 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 624 {
 625     vout_sys_t *p_sys = p_vout->p_sys;
 626
 627     if( p_sys->p_vout->pf_control )
 628         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 629     return VLC_EGENERIC;
 630 }
 631
 632 static int InitTextures( vout_thread_t *p_vout )
 633 {
 634     vout_sys_t *p_sys = p_vout->p_sys;
 635     int i_index;
 636
 637     glDeleteTextures( 2, p_sys->p_textures );
 638     glGenTextures( 2, p_sys->p_textures );
 639
 640     for( i_index = 0; i_index < 2; i_index++ )
 641     {
 642         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 643
 644         /* Set the texture parameters */
 645         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 646
 647         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 648         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 649
 650         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 651         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 652
 653         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 654
 655 #ifdef __APPLE__
 656         /* Tell the driver not to make a copy of the texture but to use
 657            our buffer */
 658         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 659         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 660
 661 #if 0
 662         /* Use VRAM texturing */
 663         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 664                          GL_STORAGE_CACHED_APPLE );
 665 #else
 666         /* Use AGP texturing */
 667         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 668                          GL_STORAGE_SHARED_APPLE );
 669 #endif
 670 #endif
 671
 672         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 673         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 674                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 675                       p_sys->pp_buffer[i_index] );
 676     }
 677
 678     return 0;
 679 }
 680
 681 /*****************************************************************************
 682  * SendEvents: forward mouse and keyboard events to the parent p_vout
 683  *****************************************************************************/
 684 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 685                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 686 {
 687     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 688     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 689 }