git.sesse.net Git - vlc/blob - modules/video_output/opengl.c

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet <asmax@videolan.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *          Eric Petit <titer@m0k.org>
  10  *          Cedric Cocquebert <cedric.cocquebert@supelec.fr>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 /*****************************************************************************
  28  * Preamble
  29  *****************************************************************************/
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <errno.h>                                                 /* ENOMEM */
  36
  37 #include <vlc_common.h>
  38 #include <vlc_plugin.h>
  39 #include <vlc_vout.h>
  40
  41 #ifdef __APPLE__
  42 #include <OpenGL/gl.h>
  43 #include <OpenGL/glext.h>
  44
  45 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  46    This allows sizes which are not powers of 2 */
  47 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  48
  49 /* OS X OpenGL supports YUV. Hehe. */
  50 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  51 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  52 #else
  53
  54 #include <GL/gl.h>
  55 #define VLCGL_TARGET GL_TEXTURE_2D
  56
  57 /* RV16 */
  58 #ifndef GL_UNSIGNED_SHORT_5_6_5
  59 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  60 #endif
  61 //#define VLCGL_RGB_FORMAT GL_RGB
  62 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  63
  64 /* RV24 */
  65 //#define VLCGL_RGB_FORMAT GL_RGB
  66 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  67
  68 /* RV32 */
  69 #define VLCGL_RGB_FORMAT GL_RGBA
  70 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  71
  72 /* YUY2 */
  73 #ifndef YCBCR_MESA
  74 #define YCBCR_MESA 0x8757
  75 #endif
  76 #ifndef UNSIGNED_SHORT_8_8_MESA
  77 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
  78 #endif
  79 #define VLCGL_YUV_FORMAT YCBCR_MESA
  80 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  81
  82 /* Use RGB on Win32/GLX */
  83 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  84 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  85 //#define VLCGL_FORMAT VLCGL_YUV_FORMAT
  86 //#define VLCGL_TYPE   VLCGL_YUV_TYPE
  87 #endif
  88
  89 #ifndef GL_CLAMP_TO_EDGE
  90 #   define GL_CLAMP_TO_EDGE 0x812F
  91 #endif
  92
  93 /*****************************************************************************
  94  * Vout interface
  95  *****************************************************************************/
  96 static int  CreateVout   ( vlc_object_t * );
  97 static void DestroyVout  ( vlc_object_t * );
  98 static int  Init         ( vout_thread_t * );
  99 static void End          ( vout_thread_t * );
 100 static int  Manage       ( vout_thread_t * );
 101 static void Render       ( vout_thread_t *, picture_t * );
 102 static void DisplayVideo ( vout_thread_t *, picture_t * );
 103 static int  Control      ( vout_thread_t *, int, va_list );
 104
 105 static inline int GetAlignedSize( int );
 106
 107 static int InitTextures  ( vout_thread_t * );
 108 static int SendEvents    ( vlc_object_t *, char const *,
 109                            vlc_value_t, vlc_value_t, void * );
 110
 111 #define PROVIDER_TEXT N_("OpenGL Provider")
 112 #define PROVIDER_LONGTEXT N_("Allows you to modify what OpenGL provider should be used")
 113
 114 vlc_module_begin ()
 115     set_shortname( "OpenGL" )
 116     set_category( CAT_VIDEO )
 117     set_subcategory( SUBCAT_VIDEO_VOUT )
 118     set_description( N_("OpenGL video output") )
 119 #ifdef __APPLE__
 120     set_capability( "video output", 200 )
 121 #else
 122     set_capability( "video output", 20 )
 123 #endif
 124     add_shortcut( "opengl" )
 125     /* Allow opengl provider plugin selection */
 126     add_string( "opengl-provider", "default", NULL, PROVIDER_TEXT,
 127                     PROVIDER_LONGTEXT, true );
 128     set_callbacks( CreateVout, DestroyVout )
 129 vlc_module_end ()
 130
 131 /*****************************************************************************
 132  * vout_sys_t: video output method descriptor
 133  *****************************************************************************
 134  * This structure is part of the video output thread descriptor.
 135  * It describes the OpenGL specific properties of the output thread.
 136  *****************************************************************************/
 137 struct vout_sys_t
 138 {
 139     vout_thread_t *p_vout;
 140
 141     uint8_t    *pp_buffer[2];
 142     int         i_index;
 143     int         i_tex_width;
 144     int         i_tex_height;
 145     GLuint      p_textures[2];
 146 };
 147
 148 /*****************************************************************************
 149  * CreateVout: This function allocates and initializes the OpenGL vout method.
 150  *****************************************************************************/
 151 static int CreateVout( vlc_object_t *p_this )
 152 {
 153     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 154     vout_sys_t *p_sys;
 155     char * psz;
 156
 157     /* Allocate structure */
 158     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 159     if( p_sys == NULL )
 160         return VLC_ENOMEM;
 161
 162     p_sys->i_index = 0;
 163 #ifdef __APPLE__
 164     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 165     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 166 #else
 167     /* A texture must have a size aligned on a power of 2 */
 168     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 169     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 170 #endif
 171
 172     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 173              p_sys->i_tex_height );
 174
 175     /* Get window */
 176     p_sys->p_vout =
 177         (vout_thread_t *)vlc_object_create( p_this, sizeof( vout_thread_t ) );
 178     if( p_sys->p_vout == NULL )
 179     {
 180         free( p_sys );
 181         return VLC_ENOMEM;
 182     }
 183     vlc_object_attach( p_sys->p_vout, p_this );
 184
 185     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 186     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 187     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 188     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 189     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 190     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 191     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 192     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 193     p_sys->p_vout->b_scale = p_vout->b_scale;
 194     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 195
 196     psz = config_GetPsz( p_vout, "opengl-provider" );
 197
 198     msg_Dbg( p_vout, "requesting \"%s\" opengl provider",
 199                       psz ? psz : "default" );
 200
 201     p_sys->p_vout->p_module =
 202         module_need( p_sys->p_vout, "opengl provider", psz, false );
 203     free( psz );
 204     if( p_sys->p_vout->p_module == NULL )
 205     {
 206         msg_Warn( p_vout, "No OpenGL provider found" );
 207         vlc_object_detach( p_sys->p_vout );
 208         vlc_object_release( p_sys->p_vout );
 209         return VLC_ENOOBJ;
 210     }
 211
 212     p_vout->pf_init = Init;
 213     p_vout->pf_end = End;
 214     p_vout->pf_manage = Manage;
 215     p_vout->pf_render = Render;
 216     p_vout->pf_display = DisplayVideo;
 217     p_vout->pf_control = Control;
 218
 219     /* Forward events from the opengl provider */
 220     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 221     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 222     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 223     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 224     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 225     var_Create( p_sys->p_vout, "video-on-top",
 226                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 227
 228     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 229     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 230     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 231     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 232     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 233
 234     return VLC_SUCCESS;
 235 }
 236
 237 /*****************************************************************************
 238  * Init: initialize the OpenGL video thread output method
 239  *****************************************************************************/
 240 static int Init( vout_thread_t *p_vout )
 241 {
 242     vout_sys_t *p_sys = p_vout->p_sys;
 243     int i_pixel_pitch;
 244     vlc_value_t val;
 245
 246     p_sys->p_vout->pf_init( p_sys->p_vout );
 247
 248 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 249 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 250     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 251     i_pixel_pitch = 2;
 252
 253 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 254     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 255     i_pixel_pitch = 2;
 256
 257 #elif VLCGL_FORMAT == GL_RGB
 258 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 259     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 260 #       if defined( WORDS_BIGENDIAN )
 261     p_vout->output.i_rmask = 0x00ff0000;
 262     p_vout->output.i_gmask = 0x0000ff00;
 263     p_vout->output.i_bmask = 0x000000ff;
 264 #       else
 265     p_vout->output.i_rmask = 0x000000ff;
 266     p_vout->output.i_gmask = 0x0000ff00;
 267     p_vout->output.i_bmask = 0x00ff0000;
 268 #       endif
 269     i_pixel_pitch = 3;
 270 #   else
 271     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 272 #       if defined( WORDS_BIGENDIAN )
 273     p_vout->output.i_rmask = 0x001f;
 274     p_vout->output.i_gmask = 0x07e0;
 275     p_vout->output.i_bmask = 0xf800;
 276 #       else
 277     p_vout->output.i_rmask = 0xf800;
 278     p_vout->output.i_gmask = 0x07e0;
 279     p_vout->output.i_bmask = 0x001f;
 280 #       endif
 281     i_pixel_pitch = 2;
 282 #   endif
 283 #else
 284     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 285 #       if defined( WORDS_BIGENDIAN )
 286     p_vout->output.i_rmask = 0xff000000;
 287     p_vout->output.i_gmask = 0x00ff0000;
 288     p_vout->output.i_bmask = 0x0000ff00;
 289 #       else
 290     p_vout->output.i_rmask = 0x000000ff;
 291     p_vout->output.i_gmask = 0x0000ff00;
 292     p_vout->output.i_bmask = 0x00ff0000;
 293 #       endif
 294     i_pixel_pitch = 4;
 295 #endif
 296
 297     /* Since OpenGL can do rescaling for us, stick to the default
 298      * coordinates and aspect. */
 299     p_vout->output.i_width  = p_vout->render.i_width;
 300     p_vout->output.i_height = p_vout->render.i_height;
 301     p_vout->output.i_aspect = p_vout->render.i_aspect;
 302
 303     p_vout->fmt_out = p_vout->fmt_in;
 304     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 305
 306     /* We know the chroma, allocate one buffer which will be used
 307      * directly by the decoder */
 308     p_sys->pp_buffer[0] =
 309         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 310     if( !p_sys->pp_buffer[0] )
 311         return -1;
 312     p_sys->pp_buffer[1] =
 313         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 314     if( !p_sys->pp_buffer[1] )
 315         return -1;
 316
 317     p_vout->p_picture[0].i_planes = 1;
 318     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 319     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 320     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 321     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 322     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 323         p_vout->p_picture[0].p->i_pixel_pitch;
 324     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 325         p_vout->p_picture[0].p->i_pixel_pitch;
 326
 327     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 328     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 329
 330     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 331
 332     I_OUTPUTPICTURES = 1;
 333
 334     if( p_sys->p_vout->pf_lock &&
 335         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 336     {
 337         msg_Warn( p_vout, "could not lock OpenGL provider" );
 338         return 0;
 339     }
 340
 341     InitTextures( p_vout );
 342
 343     glDisable(GL_BLEND);
 344     glDisable(GL_DEPTH_TEST);
 345     glDepthMask(GL_FALSE);
 346     glDisable(GL_CULL_FACE);
 347     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 348     glClear( GL_COLOR_BUFFER_BIT );
 349
 350     if( p_sys->p_vout->pf_unlock )
 351     {
 352         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 353     }
 354
 355     return 0;
 356 }
 357
 358 /*****************************************************************************
 359  * End: terminate GLX video thread output method
 360  *****************************************************************************/
 361 static void End( vout_thread_t *p_vout )
 362 {
 363     vout_sys_t *p_sys = p_vout->p_sys;
 364
 365     if( p_sys->p_vout->pf_lock &&
 366         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 367     {
 368         msg_Warn( p_vout, "could not lock OpenGL provider" );
 369         return;
 370     }
 371
 372     glFinish();
 373     glFlush();
 374
 375     /* Free the texture buffer*/
 376     glDeleteTextures( 2, p_sys->p_textures );
 377     free( p_sys->pp_buffer[0] );
 378     free( p_sys->pp_buffer[1] );
 379
 380     if( p_sys->p_vout->pf_unlock )
 381     {
 382         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 383     }
 384 }
 385
 386 /*****************************************************************************
 387  * Destroy: destroy GLX video thread output method
 388  *****************************************************************************
 389  * Terminate an output method created by CreateVout
 390  *****************************************************************************/
 391 static void DestroyVout( vlc_object_t *p_this )
 392 {
 393     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 394     vout_sys_t *p_sys = p_vout->p_sys;
 395
 396     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 397     vlc_object_release( p_sys->p_vout );
 398
 399     free( p_sys );
 400 }
 401
 402 /*****************************************************************************
 403  * Manage: handle Sys events
 404  *****************************************************************************
 405  * This function should be called regularly by video output thread. It returns
 406  * a non null value if an error occurred.
 407  *****************************************************************************/
 408 static int Manage( vout_thread_t *p_vout )
 409 {
 410     vout_sys_t *p_sys = p_vout->p_sys;
 411     int i_ret, i_fullscreen_change;
 412
 413     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 414
 415     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 416         p_vout->fmt_in.i_x_offset;
 417     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 418         p_vout->fmt_in.i_y_offset;
 419     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 420         p_vout->fmt_in.i_visible_width;
 421     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 422         p_vout->fmt_in.i_visible_height;
 423     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 424         p_vout->fmt_in.i_aspect;
 425     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 426         p_vout->fmt_in.i_sar_num;
 427     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 428         p_vout->fmt_in.i_sar_den;
 429     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 430
 431     p_sys->p_vout->i_changes = p_vout->i_changes;
 432     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 433     p_vout->i_changes = p_sys->p_vout->i_changes;
 434
 435 #ifdef __APPLE__
 436     if( p_sys->p_vout->pf_lock &&
 437         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 438     {
 439         msg_Warn( p_vout, "could not lock OpenGL provider" );
 440         return i_ret;
 441     }
 442
 443     /* On OS X, we create the window and the GL view when entering
 444        fullscreen - the textures have to be inited again */
 445     if( i_fullscreen_change )
 446     {
 447         InitTextures( p_vout );
 448     }
 449
 450     if( p_sys->p_vout->pf_unlock )
 451     {
 452         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 453     }
 454 #endif
 455 // to align in real time in OPENGL
 456     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
 457     {
 458         p_vout->i_changes = VOUT_CROP_CHANGE;        //to force change
 459         p_sys->p_vout->i_alignment = p_vout->i_alignment;
 460     }
 461     return i_ret;
 462 }
 463
 464 /*****************************************************************************
 465  * Render: render previously calculated output
 466  *****************************************************************************/
 467 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 468 {
 469     VLC_UNUSED(p_pic);
 470     vout_sys_t *p_sys = p_vout->p_sys;
 471
 472     /* On Win32/GLX, we do this the usual way:
 473        + Fill the buffer with new content,
 474        + Reload the texture,
 475        + Use the texture.
 476
 477        On OS X with VRAM or AGP texturing, the order has to be:
 478        + Reload the texture,
 479        + Fill the buffer with new content,
 480        + Use the texture.
 481
 482        (Thanks to gcc from the Arstechnica forums for the tip)
 483
 484        Therefore, we have to use two buffers and textures. On Win32/GLX,
 485        we reload the texture to be displayed and use it right away. On
 486        OS X, we first render, then reload the texture to be used next
 487        time. */
 488
 489     if( p_sys->p_vout->pf_lock &&
 490         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 491     {
 492         msg_Warn( p_vout, "could not lock OpenGL provider" );
 493         return;
 494     }
 495
 496 #ifdef __APPLE__
 497     int i_new_index;
 498     i_new_index = ( p_sys->i_index + 1 ) & 1;
 499
 500
 501     /* Update the texture */
 502     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 503     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 504                      p_vout->fmt_out.i_width,
 505                      p_vout->fmt_out.i_height,
 506                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 507
 508     /* Bind to the previous texture for drawing */
 509     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 510
 511     /* Switch buffers */
 512     p_sys->i_index = i_new_index;
 513     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 514
 515 #else
 516     /* Update the texture */
 517     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 518                      p_vout->fmt_out.i_width,
 519                      p_vout->fmt_out.i_height,
 520                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 521 #endif
 522
 523     if( p_sys->p_vout->pf_unlock )
 524     {
 525         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 526     }
 527 }
 528
 529 /*****************************************************************************
 530  * DisplayVideo: displays previously rendered output
 531  *****************************************************************************/
 532 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 533 {
 534     VLC_UNUSED(p_pic);
 535     vout_sys_t *p_sys = p_vout->p_sys;
 536     float f_width, f_height, f_x, f_y;
 537
 538     if( p_sys->p_vout->pf_lock &&
 539         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 540     {
 541         msg_Warn( p_vout, "could not lock OpenGL provider" );
 542         return;
 543     }
 544
 545     /* glTexCoord works differently with GL_TEXTURE_2D and
 546        GL_TEXTURE_RECTANGLE_EXT */
 547 #ifdef __APPLE__
 548     f_x = (float)p_vout->fmt_out.i_x_offset;
 549     f_y = (float)p_vout->fmt_out.i_y_offset;
 550     f_width = (float)p_vout->fmt_out.i_x_offset +
 551               (float)p_vout->fmt_out.i_visible_width;
 552     f_height = (float)p_vout->fmt_out.i_y_offset +
 553                (float)p_vout->fmt_out.i_visible_height;
 554 #else
 555     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 556     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 557     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 558                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 559     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 560                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 561 #endif
 562
 563     /* Why drawing here and not in Render()? Because this way, the
 564        OpenGL providers can call pf_display to force redraw. Currently,
 565        the OS X provider uses it to get a smooth window resizing */
 566
 567     glClear( GL_COLOR_BUFFER_BIT );
 568
 569     glEnable( VLCGL_TARGET );
 570     glBegin( GL_POLYGON );
 571     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 572     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 573     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 574     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 575     glEnd();
 576
 577     glDisable( VLCGL_TARGET );
 578
 579     p_sys->p_vout->pf_swap( p_sys->p_vout );
 580
 581     if( p_sys->p_vout->pf_unlock )
 582     {
 583         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 584     }
 585 }
 586
 587 int GetAlignedSize( int i_size )
 588 {
 589     /* Return the nearest power of 2 */
 590     int i_result = 1;
 591     while( i_result < i_size )
 592     {
 593         i_result *= 2;
 594     }
 595     return i_result;
 596 }
 597
 598 /*****************************************************************************
 599  * Control: control facility for the vout
 600  *****************************************************************************/
 601 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 602 {
 603     vout_sys_t *p_sys = p_vout->p_sys;
 604
 605     switch( i_query )
 606     {
 607     case VOUT_SNAPSHOT:
 608         return vout_vaControlDefault( p_vout, i_query, args );
 609
 610     default:
 611         if( p_sys->p_vout->pf_control )
 612             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 613         else
 614             return vout_vaControlDefault( p_vout, i_query, args );
 615     }
 616 }
 617
 618 static int InitTextures( vout_thread_t *p_vout )
 619 {
 620     vout_sys_t *p_sys = p_vout->p_sys;
 621     int i_index;
 622
 623     glDeleteTextures( 2, p_sys->p_textures );
 624     glGenTextures( 2, p_sys->p_textures );
 625
 626     for( i_index = 0; i_index < 2; i_index++ )
 627     {
 628         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 629
 630         /* Set the texture parameters */
 631         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 632
 633         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 634         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 635
 636         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 637         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 638
 639         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 640
 641 #ifdef __APPLE__
 642         /* Tell the driver not to make a copy of the texture but to use
 643            our buffer */
 644         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 645         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 646
 647 #if 0
 648         /* Use VRAM texturing */
 649         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 650                          GL_STORAGE_CACHED_APPLE );
 651 #else
 652         /* Use AGP texturing */
 653         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 654                          GL_STORAGE_SHARED_APPLE );
 655 #endif
 656 #endif
 657
 658         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 659         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 660                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 661                       p_sys->pp_buffer[i_index] );
 662     }
 663
 664     return 0;
 665 }
 666
 667 /*****************************************************************************
 668  * SendEvents: forward mouse and keyboard events to the parent p_vout
 669  *****************************************************************************/
 670 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 671                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 672 {
 673     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
 674     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 675 }