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     psz = var_CreateGetString( p_vout, "opengl-provider" );
 200     p_sys->p_vout->p_module =
 201         module_need( p_sys->p_vout, "opengl provider", psz, false );
 202     free( psz );
 203     if( p_sys->p_vout->p_module == NULL )
 204     {
 205         msg_Warn( p_vout, "No OpenGL provider found" );
 206         vlc_object_detach( p_sys->p_vout );
 207         vlc_object_release( p_sys->p_vout );
 208         free( p_sys );
 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     var_Create( p_sys->p_vout, "autoscale",
 228                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 229     var_Create( p_sys->p_vout, "scale",
 230                 VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 231
 232     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 233     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 234     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 235     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 236     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 237     var_AddCallback( p_vout, "autoscale", SendEvents, p_sys->p_vout );
 238     var_AddCallback( p_vout, "scale", SendEvents, p_sys->p_vout );
 239
 240     return VLC_SUCCESS;
 241 }
 242
 243 /*****************************************************************************
 244  * Init: initialize the OpenGL video thread output method
 245  *****************************************************************************/
 246 static int Init( vout_thread_t *p_vout )
 247 {
 248     vout_sys_t *p_sys = p_vout->p_sys;
 249     int i_pixel_pitch;
 250
 251     p_sys->p_vout->pf_init( p_sys->p_vout );
 252
 253 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 254 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 255     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 256     i_pixel_pitch = 2;
 257
 258 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 259     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 260     i_pixel_pitch = 2;
 261
 262 #elif VLCGL_FORMAT == GL_RGB
 263 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 264     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 265 #       if defined( WORDS_BIGENDIAN )
 266     p_vout->output.i_rmask = 0x00ff0000;
 267     p_vout->output.i_gmask = 0x0000ff00;
 268     p_vout->output.i_bmask = 0x000000ff;
 269 #       else
 270     p_vout->output.i_rmask = 0x000000ff;
 271     p_vout->output.i_gmask = 0x0000ff00;
 272     p_vout->output.i_bmask = 0x00ff0000;
 273 #       endif
 274     i_pixel_pitch = 3;
 275 #   else
 276     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 277 #       if defined( WORDS_BIGENDIAN )
 278     p_vout->output.i_rmask = 0x001f;
 279     p_vout->output.i_gmask = 0x07e0;
 280     p_vout->output.i_bmask = 0xf800;
 281 #       else
 282     p_vout->output.i_rmask = 0xf800;
 283     p_vout->output.i_gmask = 0x07e0;
 284     p_vout->output.i_bmask = 0x001f;
 285 #       endif
 286     i_pixel_pitch = 2;
 287 #   endif
 288 #else
 289     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 290 #       if defined( WORDS_BIGENDIAN )
 291     p_vout->output.i_rmask = 0xff000000;
 292     p_vout->output.i_gmask = 0x00ff0000;
 293     p_vout->output.i_bmask = 0x0000ff00;
 294 #       else
 295     p_vout->output.i_rmask = 0x000000ff;
 296     p_vout->output.i_gmask = 0x0000ff00;
 297     p_vout->output.i_bmask = 0x00ff0000;
 298 #       endif
 299     i_pixel_pitch = 4;
 300 #endif
 301
 302     /* Since OpenGL can do rescaling for us, stick to the default
 303      * coordinates and aspect. */
 304     p_vout->output.i_width  = p_vout->render.i_width;
 305     p_vout->output.i_height = p_vout->render.i_height;
 306     p_vout->output.i_aspect = p_vout->render.i_aspect;
 307
 308     p_vout->fmt_out = p_vout->fmt_in;
 309     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 310
 311     /* We know the chroma, allocate one buffer which will be used
 312      * directly by the decoder */
 313     p_sys->pp_buffer[0] =
 314         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 315     if( !p_sys->pp_buffer[0] )
 316         return -1;
 317     p_sys->pp_buffer[1] =
 318         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 319     if( !p_sys->pp_buffer[1] )
 320         return -1;
 321
 322     p_vout->p_picture[0].i_planes = 1;
 323     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 324     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 325     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 326     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 327     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 328         p_vout->p_picture[0].p->i_pixel_pitch;
 329     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 330         p_vout->p_picture[0].p->i_pixel_pitch;
 331
 332     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 333     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 334
 335     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 336
 337     I_OUTPUTPICTURES = 1;
 338
 339     if( p_sys->p_vout->pf_lock &&
 340         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 341     {
 342         msg_Warn( p_vout, "could not lock OpenGL provider" );
 343         return 0;
 344     }
 345
 346     InitTextures( p_vout );
 347
 348     glDisable(GL_BLEND);
 349     glDisable(GL_DEPTH_TEST);
 350     glDepthMask(GL_FALSE);
 351     glDisable(GL_CULL_FACE);
 352     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 353     glClear( GL_COLOR_BUFFER_BIT );
 354
 355     if( p_sys->p_vout->pf_unlock )
 356     {
 357         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 358     }
 359
 360     return 0;
 361 }
 362
 363 /*****************************************************************************
 364  * End: terminate GLX video thread output method
 365  *****************************************************************************/
 366 static void End( vout_thread_t *p_vout )
 367 {
 368     vout_sys_t *p_sys = p_vout->p_sys;
 369
 370     if( p_sys->p_vout->pf_lock &&
 371         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 372     {
 373         msg_Warn( p_vout, "could not lock OpenGL provider" );
 374         return;
 375     }
 376
 377     glFinish();
 378     glFlush();
 379
 380     /* Free the texture buffer*/
 381     glDeleteTextures( 2, p_sys->p_textures );
 382     free( p_sys->pp_buffer[0] );
 383     free( p_sys->pp_buffer[1] );
 384
 385     if( p_sys->p_vout->pf_unlock )
 386     {
 387         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 388     }
 389 }
 390
 391 /*****************************************************************************
 392  * Destroy: destroy GLX video thread output method
 393  *****************************************************************************
 394  * Terminate an output method created by CreateVout
 395  *****************************************************************************/
 396 static void DestroyVout( vlc_object_t *p_this )
 397 {
 398     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 399     vout_sys_t *p_sys = p_vout->p_sys;
 400
 401     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 402     vlc_object_release( p_sys->p_vout );
 403
 404     free( p_sys );
 405 }
 406
 407 /*****************************************************************************
 408  * Manage: handle Sys events
 409  *****************************************************************************
 410  * This function should be called regularly by video output thread. It returns
 411  * a non null value if an error occurred.
 412  *****************************************************************************/
 413 static int Manage( vout_thread_t *p_vout )
 414 {
 415     vout_sys_t *p_sys = p_vout->p_sys;
 416     int i_ret, i_fullscreen_change;
 417
 418     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 419
 420     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 421         p_vout->fmt_in.i_x_offset;
 422     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 423         p_vout->fmt_in.i_y_offset;
 424     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 425         p_vout->fmt_in.i_visible_width;
 426     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 427         p_vout->fmt_in.i_visible_height;
 428     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 429         p_vout->fmt_in.i_aspect;
 430     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 431         p_vout->fmt_in.i_sar_num;
 432     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 433         p_vout->fmt_in.i_sar_den;
 434     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 435
 436     p_sys->p_vout->i_changes = p_vout->i_changes;
 437     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 438     p_vout->i_changes = p_sys->p_vout->i_changes;
 439
 440 #ifdef __APPLE__
 441     if( p_sys->p_vout->pf_lock &&
 442         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 443     {
 444         msg_Warn( p_vout, "could not lock OpenGL provider" );
 445         return i_ret;
 446     }
 447
 448     /* On OS X, we create the window and the GL view when entering
 449        fullscreen - the textures have to be inited again */
 450     if( i_fullscreen_change )
 451     {
 452         InitTextures( p_vout );
 453     }
 454
 455     if( p_sys->p_vout->pf_unlock )
 456     {
 457         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 458     }
 459 #endif
 460 // to align in real time in OPENGL
 461     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 462     {
 463         p_vout->i_changes |= VOUT_CROP_CHANGE;        //to force change
 464         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 465     }
 466
 467     /* forward signal that autoscale toggle has changed */
 468     if (p_vout->i_changes & VOUT_SCALE_CHANGE )
 469     {
 470         p_vout->i_changes &= ~VOUT_SCALE_CHANGE;
 471
 472         p_sys->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 473     }
 474
 475     /* forward signal that scale has changed */
 476     if (p_vout->i_changes & VOUT_ZOOM_CHANGE )
 477     {
 478         p_vout->i_changes &= ~VOUT_ZOOM_CHANGE;
 479
 480         p_sys->p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 481     }
 482
 483
 484     return i_ret;
 485 }
 486
 487 /*****************************************************************************
 488  * Render: render previously calculated output
 489  *****************************************************************************/
 490 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 491 {
 492     VLC_UNUSED(p_pic);
 493     vout_sys_t *p_sys = p_vout->p_sys;
 494
 495     /* On Win32/GLX, we do this the usual way:
 496        + Fill the buffer with new content,
 497        + Reload the texture,
 498        + Use the texture.
 499
 500        On OS X with VRAM or AGP texturing, the order has to be:
 501        + Reload the texture,
 502        + Fill the buffer with new content,
 503        + Use the texture.
 504
 505        (Thanks to gcc from the Arstechnica forums for the tip)
 506
 507        Therefore, we have to use two buffers and textures. On Win32/GLX,
 508        we reload the texture to be displayed and use it right away. On
 509        OS X, we first render, then reload the texture to be used next
 510        time. */
 511
 512     if( p_sys->p_vout->pf_lock &&
 513         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 514     {
 515         msg_Warn( p_vout, "could not lock OpenGL provider" );
 516         return;
 517     }
 518
 519 #ifdef __APPLE__
 520     int i_new_index;
 521     i_new_index = ( p_sys->i_index + 1 ) & 1;
 522
 523
 524     /* Update the texture */
 525     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 526     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 527                      p_vout->fmt_out.i_width,
 528                      p_vout->fmt_out.i_height,
 529                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 530
 531     /* Bind to the previous texture for drawing */
 532     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 533
 534     /* Switch buffers */
 535     p_sys->i_index = i_new_index;
 536     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 537
 538 #else
 539     /* Update the texture */
 540     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 541                      p_vout->fmt_out.i_width,
 542                      p_vout->fmt_out.i_height,
 543                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 544 #endif
 545
 546     if( p_sys->p_vout->pf_unlock )
 547     {
 548         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 549     }
 550 }
 551
 552 /*****************************************************************************
 553  * DisplayVideo: displays previously rendered output
 554  *****************************************************************************/
 555 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 556 {
 557     VLC_UNUSED(p_pic);
 558     vout_sys_t *p_sys = p_vout->p_sys;
 559     float f_width, f_height, f_x, f_y;
 560
 561     if( p_sys->p_vout->pf_lock &&
 562         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 563     {
 564         msg_Warn( p_vout, "could not lock OpenGL provider" );
 565         return;
 566     }
 567
 568     /* glTexCoord works differently with GL_TEXTURE_2D and
 569        GL_TEXTURE_RECTANGLE_EXT */
 570 #ifdef __APPLE__
 571     f_x = (float)p_vout->fmt_out.i_x_offset;
 572     f_y = (float)p_vout->fmt_out.i_y_offset;
 573     f_width = (float)p_vout->fmt_out.i_x_offset +
 574               (float)p_vout->fmt_out.i_visible_width;
 575     f_height = (float)p_vout->fmt_out.i_y_offset +
 576                (float)p_vout->fmt_out.i_visible_height;
 577 #else
 578     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 579     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 580     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 581                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 582     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 583                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 584 #endif
 585
 586     /* Why drawing here and not in Render()? Because this way, the
 587        OpenGL providers can call pf_display to force redraw. Currently,
 588        the OS X provider uses it to get a smooth window resizing */
 589
 590     glClear( GL_COLOR_BUFFER_BIT );
 591
 592     glEnable( VLCGL_TARGET );
 593     glBegin( GL_POLYGON );
 594     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 595     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 596     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 597     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 598     glEnd();
 599
 600     glDisable( VLCGL_TARGET );
 601
 602     p_sys->p_vout->pf_swap( p_sys->p_vout );
 603
 604     if( p_sys->p_vout->pf_unlock )
 605     {
 606         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 607     }
 608 }
 609
 610 int GetAlignedSize( int i_size )
 611 {
 612     /* Return the nearest power of 2 */
 613     int i_result = 1;
 614     while( i_result < i_size )
 615     {
 616         i_result *= 2;
 617     }
 618     return i_result;
 619 }
 620
 621 /*****************************************************************************
 622  * Control: control facility for the vout
 623  *****************************************************************************/
 624 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 625 {
 626     vout_sys_t *p_sys = p_vout->p_sys;
 627
 628     if( p_sys->p_vout->pf_control )
 629         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 630     return VLC_EGENERIC;
 631 }
 632
 633 static int InitTextures( vout_thread_t *p_vout )
 634 {
 635     vout_sys_t *p_sys = p_vout->p_sys;
 636     int i_index;
 637
 638     glDeleteTextures( 2, p_sys->p_textures );
 639     glGenTextures( 2, p_sys->p_textures );
 640
 641     for( i_index = 0; i_index < 2; i_index++ )
 642     {
 643         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 644
 645         /* Set the texture parameters */
 646         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 647
 648         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 649         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 650
 651         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 652         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 653
 654         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 655
 656 #ifdef __APPLE__
 657         /* Tell the driver not to make a copy of the texture but to use
 658            our buffer */
 659         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 660         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 661
 662 #if 0
 663         /* Use VRAM texturing */
 664         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 665                          GL_STORAGE_CACHED_APPLE );
 666 #else
 667         /* Use AGP texturing */
 668         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 669                          GL_STORAGE_SHARED_APPLE );
 670 #endif
 671 #endif
 672
 673         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 674         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 675                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 676                       p_sys->pp_buffer[i_index] );
 677     }
 678
 679     return 0;
 680 }
 681
 682 /*****************************************************************************
 683  * SendEvents: forward mouse and keyboard events to the parent p_vout
 684  *****************************************************************************/
 685 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 686                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 687 {
 688     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 689     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 690 }