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_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
 197     psz = config_GetPsz( p_vout, "opengl-provider" );
 198
 199     msg_Dbg( p_vout, "requesting \"%s\" opengl provider",
 200                       psz ? psz : "default" );
 201
 202     p_sys->p_vout->p_module =
 203         module_need( p_sys->p_vout, "opengl provider", psz, false );
 204     free( psz );
 205     if( p_sys->p_vout->p_module == NULL )
 206     {
 207         msg_Warn( p_vout, "No OpenGL provider found" );
 208         vlc_object_detach( p_sys->p_vout );
 209         vlc_object_release( p_sys->p_vout );
 210         return VLC_ENOOBJ;
 211     }
 212
 213     p_vout->pf_init = Init;
 214     p_vout->pf_end = End;
 215     p_vout->pf_manage = Manage;
 216     p_vout->pf_render = Render;
 217     p_vout->pf_display = DisplayVideo;
 218     p_vout->pf_control = Control;
 219
 220     /* Forward events from the opengl provider */
 221     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 222     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 223     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 224     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_BOOL );
 225     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 226     var_Create( p_sys->p_vout, "video-on-top",
 227                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 228     var_Create( p_sys->p_vout, "autoscale",
 229                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 230     var_Create( p_sys->p_vout, "scale",
 231                 VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 232
 233     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 234     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 235     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 236     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 237     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 238     var_AddCallback( p_vout, "autoscale", SendEvents, p_sys->p_vout );
 239     var_AddCallback( p_vout, "scale", SendEvents, p_sys->p_vout );
 240
 241     return VLC_SUCCESS;
 242 }
 243
 244 /*****************************************************************************
 245  * Init: initialize the OpenGL video thread output method
 246  *****************************************************************************/
 247 static int Init( vout_thread_t *p_vout )
 248 {
 249     vout_sys_t *p_sys = p_vout->p_sys;
 250     int i_pixel_pitch;
 251
 252     p_sys->p_vout->pf_init( p_sys->p_vout );
 253
 254 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 255 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 256     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 257     i_pixel_pitch = 2;
 258
 259 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 260     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 261     i_pixel_pitch = 2;
 262
 263 #elif VLCGL_FORMAT == GL_RGB
 264 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 265     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 266 #       if defined( WORDS_BIGENDIAN )
 267     p_vout->output.i_rmask = 0x00ff0000;
 268     p_vout->output.i_gmask = 0x0000ff00;
 269     p_vout->output.i_bmask = 0x000000ff;
 270 #       else
 271     p_vout->output.i_rmask = 0x000000ff;
 272     p_vout->output.i_gmask = 0x0000ff00;
 273     p_vout->output.i_bmask = 0x00ff0000;
 274 #       endif
 275     i_pixel_pitch = 3;
 276 #   else
 277     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 278 #       if defined( WORDS_BIGENDIAN )
 279     p_vout->output.i_rmask = 0x001f;
 280     p_vout->output.i_gmask = 0x07e0;
 281     p_vout->output.i_bmask = 0xf800;
 282 #       else
 283     p_vout->output.i_rmask = 0xf800;
 284     p_vout->output.i_gmask = 0x07e0;
 285     p_vout->output.i_bmask = 0x001f;
 286 #       endif
 287     i_pixel_pitch = 2;
 288 #   endif
 289 #else
 290     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 291 #       if defined( WORDS_BIGENDIAN )
 292     p_vout->output.i_rmask = 0xff000000;
 293     p_vout->output.i_gmask = 0x00ff0000;
 294     p_vout->output.i_bmask = 0x0000ff00;
 295 #       else
 296     p_vout->output.i_rmask = 0x000000ff;
 297     p_vout->output.i_gmask = 0x0000ff00;
 298     p_vout->output.i_bmask = 0x00ff0000;
 299 #       endif
 300     i_pixel_pitch = 4;
 301 #endif
 302
 303     /* Since OpenGL can do rescaling for us, stick to the default
 304      * coordinates and aspect. */
 305     p_vout->output.i_width  = p_vout->render.i_width;
 306     p_vout->output.i_height = p_vout->render.i_height;
 307     p_vout->output.i_aspect = p_vout->render.i_aspect;
 308
 309     p_vout->fmt_out = p_vout->fmt_in;
 310     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 311
 312     /* We know the chroma, allocate one buffer which will be used
 313      * directly by the decoder */
 314     p_sys->pp_buffer[0] =
 315         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 316     if( !p_sys->pp_buffer[0] )
 317         return -1;
 318     p_sys->pp_buffer[1] =
 319         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 320     if( !p_sys->pp_buffer[1] )
 321         return -1;
 322
 323     p_vout->p_picture[0].i_planes = 1;
 324     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 325     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 326     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 327     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 328     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 329         p_vout->p_picture[0].p->i_pixel_pitch;
 330     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 331         p_vout->p_picture[0].p->i_pixel_pitch;
 332
 333     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 334     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 335
 336     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 337
 338     I_OUTPUTPICTURES = 1;
 339
 340     if( p_sys->p_vout->pf_lock &&
 341         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 342     {
 343         msg_Warn( p_vout, "could not lock OpenGL provider" );
 344         return 0;
 345     }
 346
 347     InitTextures( p_vout );
 348
 349     glDisable(GL_BLEND);
 350     glDisable(GL_DEPTH_TEST);
 351     glDepthMask(GL_FALSE);
 352     glDisable(GL_CULL_FACE);
 353     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 354     glClear( GL_COLOR_BUFFER_BIT );
 355
 356     if( p_sys->p_vout->pf_unlock )
 357     {
 358         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 359     }
 360
 361     return 0;
 362 }
 363
 364 /*****************************************************************************
 365  * End: terminate GLX video thread output method
 366  *****************************************************************************/
 367 static void End( vout_thread_t *p_vout )
 368 {
 369     vout_sys_t *p_sys = p_vout->p_sys;
 370
 371     if( p_sys->p_vout->pf_lock &&
 372         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 373     {
 374         msg_Warn( p_vout, "could not lock OpenGL provider" );
 375         return;
 376     }
 377
 378     glFinish();
 379     glFlush();
 380
 381     /* Free the texture buffer*/
 382     glDeleteTextures( 2, p_sys->p_textures );
 383     free( p_sys->pp_buffer[0] );
 384     free( p_sys->pp_buffer[1] );
 385
 386     if( p_sys->p_vout->pf_unlock )
 387     {
 388         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 389     }
 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     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 403     vlc_object_release( p_sys->p_vout );
 404
 405     free( p_sys );
 406 }
 407
 408 /*****************************************************************************
 409  * Manage: handle Sys events
 410  *****************************************************************************
 411  * This function should be called regularly by video output thread. It returns
 412  * a non null value if an error occurred.
 413  *****************************************************************************/
 414 static int Manage( vout_thread_t *p_vout )
 415 {
 416     vout_sys_t *p_sys = p_vout->p_sys;
 417     int i_ret, i_fullscreen_change;
 418
 419     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 420
 421     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 422         p_vout->fmt_in.i_x_offset;
 423     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 424         p_vout->fmt_in.i_y_offset;
 425     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 426         p_vout->fmt_in.i_visible_width;
 427     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 428         p_vout->fmt_in.i_visible_height;
 429     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 430         p_vout->fmt_in.i_aspect;
 431     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 432         p_vout->fmt_in.i_sar_num;
 433     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 434         p_vout->fmt_in.i_sar_den;
 435     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 436
 437     p_sys->p_vout->i_changes = p_vout->i_changes;
 438     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 439     p_vout->i_changes = p_sys->p_vout->i_changes;
 440
 441 #ifdef __APPLE__
 442     if( p_sys->p_vout->pf_lock &&
 443         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 444     {
 445         msg_Warn( p_vout, "could not lock OpenGL provider" );
 446         return i_ret;
 447     }
 448
 449     /* On OS X, we create the window and the GL view when entering
 450        fullscreen - the textures have to be inited again */
 451     if( i_fullscreen_change )
 452     {
 453         InitTextures( p_vout );
 454     }
 455
 456     if( p_sys->p_vout->pf_unlock )
 457     {
 458         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 459     }
 460 #endif
 461 // to align in real time in OPENGL
 462     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 463     {
 464         p_vout->i_changes |= VOUT_CROP_CHANGE;        //to force change
 465         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 466     }
 467
 468     /* forward signal that autoscale toggle has changed */
 469     if (p_vout->i_changes & VOUT_SCALE_CHANGE )
 470     {
 471         p_vout->i_changes &= ~VOUT_SCALE_CHANGE;
 472
 473         p_sys->p_vout->i_changes |= VOUT_SCALE_CHANGE;
 474     }
 475
 476     /* forward signal that scale has changed */
 477     if (p_vout->i_changes & VOUT_ZOOM_CHANGE )
 478     {
 479         p_vout->i_changes &= ~VOUT_ZOOM_CHANGE;
 480
 481         p_sys->p_vout->i_changes |= VOUT_ZOOM_CHANGE;
 482     }
 483
 484
 485     return i_ret;
 486 }
 487
 488 /*****************************************************************************
 489  * Render: render previously calculated output
 490  *****************************************************************************/
 491 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 492 {
 493     VLC_UNUSED(p_pic);
 494     vout_sys_t *p_sys = p_vout->p_sys;
 495
 496     /* On Win32/GLX, we do this the usual way:
 497        + Fill the buffer with new content,
 498        + Reload the texture,
 499        + Use the texture.
 500
 501        On OS X with VRAM or AGP texturing, the order has to be:
 502        + Reload the texture,
 503        + Fill the buffer with new content,
 504        + Use the texture.
 505
 506        (Thanks to gcc from the Arstechnica forums for the tip)
 507
 508        Therefore, we have to use two buffers and textures. On Win32/GLX,
 509        we reload the texture to be displayed and use it right away. On
 510        OS X, we first render, then reload the texture to be used next
 511        time. */
 512
 513     if( p_sys->p_vout->pf_lock &&
 514         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 515     {
 516         msg_Warn( p_vout, "could not lock OpenGL provider" );
 517         return;
 518     }
 519
 520 #ifdef __APPLE__
 521     int i_new_index;
 522     i_new_index = ( p_sys->i_index + 1 ) & 1;
 523
 524
 525     /* Update the texture */
 526     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 527     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 528                      p_vout->fmt_out.i_width,
 529                      p_vout->fmt_out.i_height,
 530                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 531
 532     /* Bind to the previous texture for drawing */
 533     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 534
 535     /* Switch buffers */
 536     p_sys->i_index = i_new_index;
 537     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 538
 539 #else
 540     /* Update the texture */
 541     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 542                      p_vout->fmt_out.i_width,
 543                      p_vout->fmt_out.i_height,
 544                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 545 #endif
 546
 547     if( p_sys->p_vout->pf_unlock )
 548     {
 549         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 550     }
 551 }
 552
 553 /*****************************************************************************
 554  * DisplayVideo: displays previously rendered output
 555  *****************************************************************************/
 556 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 557 {
 558     VLC_UNUSED(p_pic);
 559     vout_sys_t *p_sys = p_vout->p_sys;
 560     float f_width, f_height, f_x, f_y;
 561
 562     if( p_sys->p_vout->pf_lock &&
 563         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 564     {
 565         msg_Warn( p_vout, "could not lock OpenGL provider" );
 566         return;
 567     }
 568
 569     /* glTexCoord works differently with GL_TEXTURE_2D and
 570        GL_TEXTURE_RECTANGLE_EXT */
 571 #ifdef __APPLE__
 572     f_x = (float)p_vout->fmt_out.i_x_offset;
 573     f_y = (float)p_vout->fmt_out.i_y_offset;
 574     f_width = (float)p_vout->fmt_out.i_x_offset +
 575               (float)p_vout->fmt_out.i_visible_width;
 576     f_height = (float)p_vout->fmt_out.i_y_offset +
 577                (float)p_vout->fmt_out.i_visible_height;
 578 #else
 579     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 580     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 581     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 582                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 583     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 584                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 585 #endif
 586
 587     /* Why drawing here and not in Render()? Because this way, the
 588        OpenGL providers can call pf_display to force redraw. Currently,
 589        the OS X provider uses it to get a smooth window resizing */
 590
 591     glClear( GL_COLOR_BUFFER_BIT );
 592
 593     glEnable( VLCGL_TARGET );
 594     glBegin( GL_POLYGON );
 595     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 596     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 597     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 598     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 599     glEnd();
 600
 601     glDisable( VLCGL_TARGET );
 602
 603     p_sys->p_vout->pf_swap( p_sys->p_vout );
 604
 605     if( p_sys->p_vout->pf_unlock )
 606     {
 607         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 608     }
 609 }
 610
 611 int GetAlignedSize( int i_size )
 612 {
 613     /* Return the nearest power of 2 */
 614     int i_result = 1;
 615     while( i_result < i_size )
 616     {
 617         i_result *= 2;
 618     }
 619     return i_result;
 620 }
 621
 622 /*****************************************************************************
 623  * Control: control facility for the vout
 624  *****************************************************************************/
 625 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 626 {
 627     vout_sys_t *p_sys = p_vout->p_sys;
 628
 629     if( p_sys->p_vout->pf_control )
 630         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 631     return VLC_EGENERIC;
 632 }
 633
 634 static int InitTextures( vout_thread_t *p_vout )
 635 {
 636     vout_sys_t *p_sys = p_vout->p_sys;
 637     int i_index;
 638
 639     glDeleteTextures( 2, p_sys->p_textures );
 640     glGenTextures( 2, p_sys->p_textures );
 641
 642     for( i_index = 0; i_index < 2; i_index++ )
 643     {
 644         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 645
 646         /* Set the texture parameters */
 647         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 648
 649         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 650         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 651
 652         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 653         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 654
 655         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 656
 657 #ifdef __APPLE__
 658         /* Tell the driver not to make a copy of the texture but to use
 659            our buffer */
 660         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 661         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 662
 663 #if 0
 664         /* Use VRAM texturing */
 665         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 666                          GL_STORAGE_CACHED_APPLE );
 667 #else
 668         /* Use AGP texturing */
 669         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 670                          GL_STORAGE_SHARED_APPLE );
 671 #endif
 672 #endif
 673
 674         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 675         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 676                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 677                       p_sys->pp_buffer[i_index] );
 678     }
 679
 680     return 0;
 681 }
 682
 683 /*****************************************************************************
 684  * SendEvents: forward mouse and keyboard events to the parent p_vout
 685  *****************************************************************************/
 686 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 687                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 688 {
 689     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 690     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 691 }