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 #endif
  45
  46 #ifndef YCBCR_MESA
  47 # define YCBCR_MESA 0x8757
  48 #endif
  49 #ifndef UNSIGNED_SHORT_8_8_MESA
  50 # define UNSIGNED_SHORT_8_8_MESA 0x85BA
  51 #endif
  52 /* RV16 */
  53 #ifndef GL_UNSIGNED_SHORT_5_6_5
  54 # define GL_UNSIGNED_SHORT_5_6_5 0x8363
  55 #endif
  56 #ifndef GL_CLAMP_TO_EDGE
  57 # define GL_CLAMP_TO_EDGE 0x812F
  58 #endif
  59
  60 #ifdef __APPLE__
  61 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  62    This allows sizes which are not powers of 2 */
  63 # define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  64
  65 /* OS X OpenGL supports YUV. Hehe. */
  66 # define VLCGL_FORMAT GL_YCBCR_422_APPLE
  67 # define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  68 #else
  69
  70 # include <GL/gl.h>
  71 # define VLCGL_TARGET GL_TEXTURE_2D
  72
  73 /* RV32 */
  74 # define VLCGL_RGB_FORMAT GL_RGBA
  75 # define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  76
  77 /* YUY2 */
  78 # define VLCGL_YUV_FORMAT YCBCR_MESA
  79 # define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  80
  81 /* Use RGB on Win32/GLX */
  82 # define VLCGL_FORMAT VLCGL_RGB_FORMAT
  83 # define VLCGL_TYPE   VLCGL_RGB_TYPE
  84 #endif
  85
  86
  87 /*****************************************************************************
  88  * Vout interface
  89  *****************************************************************************/
  90 static int  CreateVout   ( vlc_object_t * );
  91 static void DestroyVout  ( vlc_object_t * );
  92 static int  Init         ( vout_thread_t * );
  93 static void End          ( vout_thread_t * );
  94 static int  Manage       ( vout_thread_t * );
  95 static void Render       ( vout_thread_t *, picture_t * );
  96 static void DisplayVideo ( vout_thread_t *, picture_t * );
  97 static int  Control      ( vout_thread_t *, int, va_list );
  98
  99 static inline int GetAlignedSize( int );
 100
 101 static int InitTextures  ( vout_thread_t * );
 102 static int SendEvents    ( vlc_object_t *, char const *,
 103                            vlc_value_t, vlc_value_t, void * );
 104
 105 #define PROVIDER_TEXT N_("OpenGL Provider")
 106 #define PROVIDER_LONGTEXT N_("Allows you to modify what OpenGL provider should be used")
 107
 108 vlc_module_begin ()
 109     set_shortname( "OpenGL" )
 110     set_category( CAT_VIDEO )
 111     set_subcategory( SUBCAT_VIDEO_VOUT )
 112     set_description( N_("OpenGL video output") )
 113 #ifdef __APPLE__
 114     set_capability( "video output", 200 )
 115 #else
 116     set_capability( "video output", 20 )
 117 #endif
 118     add_shortcut( "opengl" )
 119     /* Allow opengl provider plugin selection */
 120     add_module( "opengl-provider", "opengl provider", NULL, NULL,
 121                 PROVIDER_TEXT, PROVIDER_LONGTEXT, true )
 122     set_callbacks( CreateVout, DestroyVout )
 123 vlc_module_end ()
 124
 125 /*****************************************************************************
 126  * vout_sys_t: video output method descriptor
 127  *****************************************************************************
 128  * This structure is part of the video output thread descriptor.
 129  * It describes the OpenGL specific properties of the output thread.
 130  *****************************************************************************/
 131 struct vout_sys_t
 132 {
 133     vout_thread_t *p_vout;
 134
 135     uint8_t    *pp_buffer[2];
 136     int         i_index;
 137     int         i_tex_width;
 138     int         i_tex_height;
 139     GLuint      p_textures[2];
 140 };
 141
 142 /*****************************************************************************
 143  * CreateVout: This function allocates and initializes the OpenGL vout method.
 144  *****************************************************************************/
 145 static int CreateVout( vlc_object_t *p_this )
 146 {
 147     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 148     vout_sys_t *p_sys;
 149     char * psz;
 150
 151     /* Allocate structure */
 152     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 153     if( p_sys == NULL )
 154         return VLC_ENOMEM;
 155
 156     p_sys->i_index = 0;
 157 #ifdef __APPLE__
 158     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 159     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 160 #else
 161     /* A texture must have a size aligned on a power of 2 */
 162     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 163     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 164 #endif
 165
 166     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 167              p_sys->i_tex_height );
 168
 169     /* Get window */
 170     p_sys->p_vout =
 171         (vout_thread_t *)vlc_object_create( p_this, sizeof( vout_thread_t ) );
 172     if( p_sys->p_vout == NULL )
 173     {
 174         free( p_sys );
 175         return VLC_ENOMEM;
 176     }
 177     vlc_object_attach( p_sys->p_vout, p_this );
 178
 179     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 180     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 181     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 182     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 183     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 184     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 185     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 186     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 187     p_sys->p_vout->b_autoscale = p_vout->b_autoscale;
 188     p_sys->p_vout->i_zoom = p_vout->i_zoom;
 189     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 190     var_Create( p_sys->p_vout, "video-deco",
 191                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 192
 193     /* Forward events from the opengl provider */
 194     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 195     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 196     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 197     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_BOOL );
 198     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 199     var_Create( p_sys->p_vout, "video-on-top",
 200                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 201     var_Create( p_sys->p_vout, "autoscale",
 202                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 203     var_Create( p_sys->p_vout, "scale",
 204                 VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 205
 206     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 207     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 208     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 209     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 210     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 211     var_AddCallback( p_sys->p_vout, "video-on-top", SendEvents, p_vout );
 212     var_AddCallback( p_vout, "autoscale", SendEvents, p_sys->p_vout );
 213     var_AddCallback( p_vout, "scale", SendEvents, p_sys->p_vout );
 214
 215     psz = var_CreateGetString( p_vout, "opengl-provider" );
 216     p_sys->p_vout->p_module =
 217         module_need( p_sys->p_vout, "opengl provider", psz, false );
 218     free( psz );
 219     if( p_sys->p_vout->p_module == NULL )
 220     {
 221         msg_Warn( p_vout, "No OpenGL provider found" );
 222         vlc_object_detach( p_sys->p_vout );
 223         /* no need for var_DelCallback here :-) */
 224         vlc_object_release( p_sys->p_vout );
 225         free( p_sys );
 226         return VLC_ENOOBJ;
 227     }
 228
 229     p_vout->pf_init = Init;
 230     p_vout->pf_end = End;
 231     p_vout->pf_manage = Manage;
 232     p_vout->pf_render = Render;
 233     p_vout->pf_display = DisplayVideo;
 234     p_vout->pf_control = Control;
 235
 236     return VLC_SUCCESS;
 237 }
 238
 239 /*****************************************************************************
 240  * Init: initialize the OpenGL video thread output method
 241  *****************************************************************************/
 242 static int Init( vout_thread_t *p_vout )
 243 {
 244     vout_sys_t *p_sys = p_vout->p_sys;
 245     int i_pixel_pitch;
 246
 247     p_sys->p_vout->pf_init( p_sys->p_vout );
 248
 249 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 250 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 251     p_vout->output.i_chroma = VLC_CODEC_YUYV;
 252     i_pixel_pitch = 2;
 253
 254 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 255     p_vout->output.i_chroma = VLC_CODEC_UYVY;
 256     i_pixel_pitch = 2;
 257
 258 #elif VLCGL_FORMAT == GL_RGB
 259 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 260     p_vout->output.i_chroma = VLC_CODEC_RGB24;
 261 #       if defined( WORDS_BIGENDIAN )
 262     p_vout->output.i_rmask = 0x00ff0000;
 263     p_vout->output.i_gmask = 0x0000ff00;
 264     p_vout->output.i_bmask = 0x000000ff;
 265 #       else
 266     p_vout->output.i_rmask = 0x000000ff;
 267     p_vout->output.i_gmask = 0x0000ff00;
 268     p_vout->output.i_bmask = 0x00ff0000;
 269 #       endif
 270     i_pixel_pitch = 3;
 271 #   else
 272     p_vout->output.i_chroma = VLC_CODEC_RGB16;
 273 #       if defined( WORDS_BIGENDIAN )
 274     p_vout->output.i_rmask = 0x001f;
 275     p_vout->output.i_gmask = 0x07e0;
 276     p_vout->output.i_bmask = 0xf800;
 277 #       else
 278     p_vout->output.i_rmask = 0xf800;
 279     p_vout->output.i_gmask = 0x07e0;
 280     p_vout->output.i_bmask = 0x001f;
 281 #       endif
 282     i_pixel_pitch = 2;
 283 #   endif
 284 #else
 285     p_vout->output.i_chroma = VLC_CODEC_RGB32;
 286 #       if defined( WORDS_BIGENDIAN )
 287     p_vout->output.i_rmask = 0xff000000;
 288     p_vout->output.i_gmask = 0x00ff0000;
 289     p_vout->output.i_bmask = 0x0000ff00;
 290 #       else
 291     p_vout->output.i_rmask = 0x000000ff;
 292     p_vout->output.i_gmask = 0x0000ff00;
 293     p_vout->output.i_bmask = 0x00ff0000;
 294 #       endif
 295     i_pixel_pitch = 4;
 296 #endif
 297
 298     /* Since OpenGL can do rescaling for us, stick to the default
 299      * coordinates and aspect. */
 300     p_vout->output.i_width  = p_vout->render.i_width;
 301     p_vout->output.i_height = p_vout->render.i_height;
 302     p_vout->output.i_aspect = p_vout->render.i_aspect;
 303
 304     p_vout->fmt_out = p_vout->fmt_in;
 305     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 306
 307     /* We know the chroma, allocate one buffer which will be used
 308      * directly by the decoder */
 309     p_sys->pp_buffer[0] =
 310         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 311     if( !p_sys->pp_buffer[0] )
 312         return -1;
 313     p_sys->pp_buffer[1] =
 314         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 315     if( !p_sys->pp_buffer[1] )
 316         return -1;
 317
 318     p_vout->p_picture[0].i_planes = 1;
 319     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 320     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 321     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 322     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 323     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 324         p_vout->p_picture[0].p->i_pixel_pitch;
 325     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 326         p_vout->p_picture[0].p->i_pixel_pitch;
 327
 328     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 329     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 330
 331     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 332
 333     I_OUTPUTPICTURES = 1;
 334
 335     if( p_sys->p_vout->pf_lock &&
 336         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 337     {
 338         msg_Warn( p_vout, "could not lock OpenGL provider" );
 339         return 0;
 340     }
 341
 342     InitTextures( p_vout );
 343
 344     glDisable(GL_BLEND);
 345     glDisable(GL_DEPTH_TEST);
 346     glDepthMask(GL_FALSE);
 347     glDisable(GL_CULL_FACE);
 348     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 349     glClear( GL_COLOR_BUFFER_BIT );
 350
 351     if( p_sys->p_vout->pf_unlock )
 352     {
 353         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 354     }
 355
 356     return 0;
 357 }
 358
 359 /*****************************************************************************
 360  * End: terminate GLX video thread output method
 361  *****************************************************************************/
 362 static void End( vout_thread_t *p_vout )
 363 {
 364     vout_sys_t *p_sys = p_vout->p_sys;
 365
 366     if( p_sys->p_vout->pf_lock &&
 367         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 368     {
 369         msg_Warn( p_vout, "could not lock OpenGL provider" );
 370         return;
 371     }
 372
 373     glFinish();
 374     glFlush();
 375
 376     /* Free the texture buffer*/
 377     glDeleteTextures( 2, p_sys->p_textures );
 378     free( p_sys->pp_buffer[0] );
 379     free( p_sys->pp_buffer[1] );
 380
 381     if( p_sys->p_vout->pf_unlock )
 382     {
 383         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 384     }
 385
 386     /* We must release the opengl provider here: opengl requiere init and end
 387        to be done in the same thread */
 388     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 389     vlc_object_release( p_sys->p_vout );
 390 }
 391
 392 /*****************************************************************************
 393  * Destroy: destroy GLX video thread output method
 394  *****************************************************************************
 395  * Terminate an output method created by CreateVout
 396  *****************************************************************************/
 397 static void DestroyVout( vlc_object_t *p_this )
 398 {
 399     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 400     vout_sys_t *p_sys = p_vout->p_sys;
 401
 402     free( p_sys );
 403 }
 404
 405 /*****************************************************************************
 406  * Manage: handle Sys events
 407  *****************************************************************************
 408  * This function should be called regularly by video output thread. It returns
 409  * a non null value if an error occurred.
 410  *****************************************************************************/
 411 static int Manage( vout_thread_t *p_vout )
 412 {
 413     vout_sys_t *p_sys = p_vout->p_sys;
 414     int i_ret, i_fullscreen_change;
 415
 416     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 417
 418     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 419         p_vout->fmt_in.i_x_offset;
 420     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 421         p_vout->fmt_in.i_y_offset;
 422     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 423         p_vout->fmt_in.i_visible_width;
 424     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 425         p_vout->fmt_in.i_visible_height;
 426     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 427         p_vout->fmt_in.i_aspect;
 428     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 429         p_vout->fmt_in.i_sar_num;
 430     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 431         p_vout->fmt_in.i_sar_den;
 432     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 433
 434     p_sys->p_vout->i_changes = p_vout->i_changes;
 435     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 436     p_vout->i_changes = p_sys->p_vout->i_changes;
 437
 438 #ifdef __APPLE__
 439     if( p_sys->p_vout->pf_lock &&
 440         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 441     {
 442         msg_Warn( p_vout, "could not lock OpenGL provider" );
 443         return i_ret;
 444     }
 445
 446     /* On OS X, we create the window and the GL view when entering
 447        fullscreen - the textures have to be inited again */
 448     if( i_fullscreen_change )
 449     {
 450         InitTextures( p_vout );
 451     }
 452
 453     if( p_sys->p_vout->pf_unlock )
 454     {
 455         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 456     }
 457 #endif
 458 // to align in real time in OPENGL
 459     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 460     {
 461         p_vout->i_changes |= VOUT_CROP_CHANGE;        //to force change
 462         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 463     }
 464
 465     /* forward signal that autoscale toggle has changed */
 466     if (p_vout->i_changes & VOUT_SCALE_CHANGE )
 467     {
 468         p_vout->i_changes &= ~VOUT_SCALE_CHANGE;
 469
 470         p_sys->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 471     }
 472
 473     /* forward signal that scale has changed */
 474     if (p_vout->i_changes & VOUT_ZOOM_CHANGE )
 475     {
 476         p_vout->i_changes &= ~VOUT_ZOOM_CHANGE;
 477
 478         p_sys->p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 479     }
 480
 481
 482     return i_ret;
 483 }
 484
 485 /*****************************************************************************
 486  * Render: render previously calculated output
 487  *****************************************************************************/
 488 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 489 {
 490     VLC_UNUSED(p_pic);
 491     vout_sys_t *p_sys = p_vout->p_sys;
 492
 493     /* On Win32/GLX, we do this the usual way:
 494        + Fill the buffer with new content,
 495        + Reload the texture,
 496        + Use the texture.
 497
 498        On OS X with VRAM or AGP texturing, the order has to be:
 499        + Reload the texture,
 500        + Fill the buffer with new content,
 501        + Use the texture.
 502
 503        (Thanks to gcc from the Arstechnica forums for the tip)
 504
 505        Therefore, we have to use two buffers and textures. On Win32/GLX,
 506        we reload the texture to be displayed and use it right away. On
 507        OS X, we first render, then reload the texture to be used next
 508        time. */
 509
 510     if( p_sys->p_vout->pf_lock &&
 511         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 512     {
 513         msg_Warn( p_vout, "could not lock OpenGL provider" );
 514         return;
 515     }
 516
 517 #ifdef __APPLE__
 518     int i_new_index;
 519     i_new_index = ( p_sys->i_index + 1 ) & 1;
 520
 521
 522     /* Update the texture */
 523     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 524     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 525                      p_vout->fmt_out.i_width,
 526                      p_vout->fmt_out.i_height,
 527                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 528
 529     /* Bind to the previous texture for drawing */
 530     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 531
 532     /* Switch buffers */
 533     p_sys->i_index = i_new_index;
 534     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 535
 536 #else
 537     /* Update the texture */
 538     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 539                      p_vout->fmt_out.i_width,
 540                      p_vout->fmt_out.i_height,
 541                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 542 #endif
 543
 544     if( p_sys->p_vout->pf_unlock )
 545     {
 546         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 547     }
 548 }
 549
 550 /*****************************************************************************
 551  * DisplayVideo: displays previously rendered output
 552  *****************************************************************************/
 553 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 554 {
 555     VLC_UNUSED(p_pic);
 556     vout_sys_t *p_sys = p_vout->p_sys;
 557     float f_width, f_height, f_x, f_y;
 558
 559     if( p_sys->p_vout->pf_lock &&
 560         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 561     {
 562         msg_Warn( p_vout, "could not lock OpenGL provider" );
 563         return;
 564     }
 565
 566     /* glTexCoord works differently with GL_TEXTURE_2D and
 567        GL_TEXTURE_RECTANGLE_EXT */
 568 #ifdef __APPLE__
 569     f_x = (float)p_vout->fmt_out.i_x_offset;
 570     f_y = (float)p_vout->fmt_out.i_y_offset;
 571     f_width = (float)p_vout->fmt_out.i_x_offset +
 572               (float)p_vout->fmt_out.i_visible_width;
 573     f_height = (float)p_vout->fmt_out.i_y_offset +
 574                (float)p_vout->fmt_out.i_visible_height;
 575 #else
 576     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 577     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 578     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 579                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 580     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 581                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 582 #endif
 583
 584     /* Why drawing here and not in Render()? Because this way, the
 585        OpenGL providers can call pf_display to force redraw. Currently,
 586        the OS X provider uses it to get a smooth window resizing */
 587
 588     glClear( GL_COLOR_BUFFER_BIT );
 589
 590     glEnable( VLCGL_TARGET );
 591     glBegin( GL_POLYGON );
 592     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 593     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 594     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 595     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 596     glEnd();
 597
 598     glDisable( VLCGL_TARGET );
 599
 600     p_sys->p_vout->pf_swap( p_sys->p_vout );
 601
 602     if( p_sys->p_vout->pf_unlock )
 603     {
 604         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 605     }
 606 }
 607
 608 int GetAlignedSize( int i_size )
 609 {
 610     /* Return the nearest power of 2 */
 611     int i_result = 1;
 612     while( i_result < i_size )
 613     {
 614         i_result *= 2;
 615     }
 616     return i_result;
 617 }
 618
 619 /*****************************************************************************
 620  * Control: control facility for the vout
 621  *****************************************************************************/
 622 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 623 {
 624     vout_sys_t *p_sys = p_vout->p_sys;
 625
 626     if( p_sys->p_vout->pf_control )
 627         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 628     return VLC_EGENERIC;
 629 }
 630
 631 static int InitTextures( vout_thread_t *p_vout )
 632 {
 633     vout_sys_t *p_sys = p_vout->p_sys;
 634     int i_index;
 635
 636     glDeleteTextures( 2, p_sys->p_textures );
 637     glGenTextures( 2, p_sys->p_textures );
 638
 639     for( i_index = 0; i_index < 2; i_index++ )
 640     {
 641         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 642
 643         /* Set the texture parameters */
 644         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 645
 646         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 647         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 648
 649         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 650         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 651
 652         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 653
 654 #ifdef __APPLE__
 655         /* Tell the driver not to make a copy of the texture but to use
 656            our buffer */
 657         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 658         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 659
 660 #if 0
 661         /* Use VRAM texturing */
 662         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 663                          GL_STORAGE_CACHED_APPLE );
 664 #else
 665         /* Use AGP texturing */
 666         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 667                          GL_STORAGE_SHARED_APPLE );
 668 #endif
 669 #endif
 670
 671         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 672         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 673                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 674                       p_sys->pp_buffer[i_index] );
 675     }
 676
 677     return 0;
 678 }
 679
 680 /*****************************************************************************
 681  * SendEvents: forward mouse and keyboard events to the parent p_vout
 682  *****************************************************************************/
 683 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 684                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 685 {
 686     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 687     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 688 }