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

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet <asmax@videolan.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <stdlib.h>                                      /* malloc(), free() */
  30 #include <string.h>
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/vout.h>
  34
  35 #ifdef SYS_DARWIN
  36 #include <OpenGL/gl.h>
  37 #include <OpenGL/glext.h>
  38
  39 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  40    This allows sizes which are not powers of 2 */
  41 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  42
  43 /* OS X OpenGL supports YUV. Hehe. */
  44 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  45 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  46 #else
  47
  48 #include <GL/gl.h>
  49 #define VLCGL_TARGET GL_TEXTURE_2D
  50
  51 /* RV16 */
  52 #ifndef GL_UNSIGNED_SHORT_5_6_5
  53 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  54 #endif
  55 //#define VLCGL_RGB_FORMAT GL_RGB
  56 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  57
  58 /* RV24 */
  59 //#define VLCGL_RGB_FORMAT GL_RGB
  60 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  61
  62 /* RV32 */
  63 #define VLCGL_RGB_FORMAT GL_RGBA
  64 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  65
  66 /* Use RGB on Win32/GLX */
  67 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  68 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  69 #endif
  70
  71 /* OpenGL effects */
  72 #define OPENGL_EFFECT_NONE             1
  73 #define OPENGL_EFFECT_CUBE             2
  74 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  75
  76 /*****************************************************************************
  77  * Vout interface
  78  *****************************************************************************/
  79 static int  CreateVout   ( vlc_object_t * );
  80 static void DestroyVout  ( vlc_object_t * );
  81 static int  Init         ( vout_thread_t * );
  82 static void End          ( vout_thread_t * );
  83 static int  Manage       ( vout_thread_t * );
  84 static void Render       ( vout_thread_t *, picture_t * );
  85 static void DisplayVideo ( vout_thread_t *, picture_t * );
  86 static int  Control      ( vout_thread_t *, int, va_list );
  87
  88 static inline int GetAlignedSize( int );
  89
  90 static int InitTextures( vout_thread_t * );
  91 static int SendEvents( vlc_object_t *, char const *,
  92                        vlc_value_t, vlc_value_t, void * );
  93
  94 /*****************************************************************************
  95  * Module descriptor
  96  *****************************************************************************/
  97 #define EFFECT_TEXT N_("Effect")
  98 #define EFFECT_LONGTEXT N_( \
  99     "Allows you to select different visual effects.")
 100
 101 static char *ppsz_effects[] = {
 102         "none", "cube", "transparent-cube", NULL };
 103 static char *ppsz_effects_text[] = {
 104         N_("None"), N_("Cube"), N_("Transparent Cube"), NULL };
 105
 106 vlc_module_begin();
 107     set_description( _("OpenGL video output") );
 108 #ifdef SYS_DARWIN
 109     set_capability( "video output", 0 );
 110 #else
 111     set_capability( "video output", 20 );
 112 #endif
 113     add_shortcut( "opengl" );
 114     set_callbacks( CreateVout, DestroyVout );
 115
 116     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 117                  EFFECT_LONGTEXT, VLC_TRUE );
 118         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 119 vlc_module_end();
 120
 121 /*****************************************************************************
 122  * vout_sys_t: video output method descriptor
 123  *****************************************************************************
 124  * This structure is part of the video output thread descriptor.
 125  * It describes the OpenGL specific properties of the output thread.
 126  *****************************************************************************/
 127 struct vout_sys_t
 128 {
 129     vout_thread_t *p_vout;
 130
 131     uint8_t    *pp_buffer[2];
 132     int         i_index;
 133     int         i_tex_width;
 134     int         i_tex_height;
 135     GLuint      p_textures[2];
 136
 137     int         i_effect;
 138 };
 139
 140 /*****************************************************************************
 141  * CreateVout: This function allocates and initializes the OpenGL vout method.
 142  *****************************************************************************/
 143 static int CreateVout( vlc_object_t *p_this )
 144 {
 145     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 146     vout_sys_t *p_sys;
 147
 148     /* Allocate structure */
 149     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 150     if( p_sys == NULL )
 151     {
 152         msg_Err( p_vout, "out of memory" );
 153         return VLC_EGENERIC;
 154     }
 155
 156     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 157
 158 #ifdef SYS_DARWIN
 159     p_sys->i_tex_width  = p_vout->render.i_width;
 160     p_sys->i_tex_height = p_vout->render.i_height;
 161 #else
 162     /* A texture must have a size aligned on a power of 2 */
 163     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 164     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 165 #endif
 166
 167     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 168              p_sys->i_tex_height );
 169
 170     /* Get window */
 171     p_sys->p_vout =
 172         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 173     if( p_sys->p_vout == NULL )
 174     {
 175         msg_Err( p_vout, "out of memory" );
 176         return VLC_ENOMEM;
 177     }
 178     vlc_object_attach( p_sys->p_vout, p_this );
 179
 180     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 181     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 182     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 183     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 184     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 185     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 186     p_sys->p_vout->b_scale = p_vout->b_scale;
 187     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 188
 189     p_sys->p_vout->p_module =
 190         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 191     if( p_sys->p_vout->p_module == NULL )
 192     {
 193         msg_Warn( p_vout, "No OpenGL provider found" );
 194         vlc_object_detach( p_sys->p_vout );
 195         vlc_object_destroy( p_sys->p_vout );
 196         return VLC_ENOOBJ;
 197     }
 198
 199     p_vout->pf_init = Init;
 200     p_vout->pf_end = End;
 201     p_vout->pf_manage = Manage;
 202     p_vout->pf_render = Render;
 203     p_vout->pf_display = DisplayVideo;
 204     p_vout->pf_control = Control;
 205
 206     /* Forward events from the opengl provider */
 207     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 208     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 209     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 210     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 211     var_Create( p_sys->p_vout, "video-on-top",
 212                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 213
 214     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 215     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 216     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 217     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 218
 219     return VLC_SUCCESS;
 220 }
 221
 222 /*****************************************************************************
 223  * Init: initialize the OpenGL video thread output method
 224  *****************************************************************************/
 225 static int Init( vout_thread_t *p_vout )
 226 {
 227     vout_sys_t *p_sys = p_vout->p_sys;
 228     int i_pixel_pitch;
 229     vlc_value_t val;
 230
 231     p_sys->p_vout->pf_init( p_sys->p_vout );
 232
 233 #ifdef SYS_DARWIN
 234     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 235     p_vout->output.i_rmask = 0x00ff0000;
 236     p_vout->output.i_gmask = 0x0000ff00;
 237     p_vout->output.i_bmask = 0x000000ff;
 238     i_pixel_pitch = 2;
 239 #else
 240 #if VLCGL_RGB_FORMAT == GL_RGB
 241 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 242     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 243     p_vout->output.i_rmask = 0x000000ff;
 244     p_vout->output.i_gmask = 0x0000ff00;
 245     p_vout->output.i_bmask = 0x00ff0000;
 246     i_pixel_pitch = 3;
 247 #   else
 248     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 249     p_vout->output.i_rmask = 0xf800;
 250     p_vout->output.i_gmask = 0x07e0;
 251     p_vout->output.i_bmask = 0x001f;
 252     i_pixel_pitch = 2;
 253 #   endif
 254 #else
 255     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 256     p_vout->output.i_rmask = 0x000000ff;
 257     p_vout->output.i_gmask = 0x0000ff00;
 258     p_vout->output.i_bmask = 0x00ff0000;
 259     i_pixel_pitch = 4;
 260 #endif
 261 #endif
 262
 263     /* Since OpenGL can do rescaling for us, stick to the default
 264      * coordinates and aspect. */
 265     p_vout->output.i_width  = p_vout->render.i_width;
 266     p_vout->output.i_height = p_vout->render.i_height;
 267     p_vout->output.i_aspect = p_vout->render.i_aspect;
 268
 269     /* We know the chroma, allocate one buffer which will be used
 270      * directly by the decoder */
 271     p_sys->pp_buffer[0] =
 272         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 273     if( !p_sys->pp_buffer[0] )
 274     {
 275         msg_Err( p_vout, "Out of memory" );
 276         return -1;
 277     }
 278     p_sys->pp_buffer[1] =
 279         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 280     if( !p_sys->pp_buffer[1] )
 281     {
 282         msg_Err( p_vout, "Out of memory" );
 283         return -1;
 284     }
 285
 286     p_vout->p_picture[0].i_planes = 1;
 287     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 288     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 289     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 290     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 291     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 292         p_vout->p_picture[0].p->i_pixel_pitch;
 293     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 294         p_vout->p_picture[0].p->i_pixel_pitch;
 295
 296     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 297     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 298
 299     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 300
 301     I_OUTPUTPICTURES = 1;
 302
 303     InitTextures( p_vout );
 304
 305     glDisable(GL_BLEND);
 306     glDisable(GL_DEPTH_TEST);
 307     glDepthMask(GL_FALSE);
 308     glDisable(GL_CULL_FACE);
 309     glClear( GL_COLOR_BUFFER_BIT );
 310
 311     /* Check if the user asked for useless visual effects */
 312     var_Get( p_vout, "opengl-effect", &val );
 313     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 314     {
 315         p_sys->i_effect = OPENGL_EFFECT_NONE;
 316     }
 317     else if( !strcmp( val.psz_string, "cube" ) )
 318     {
 319         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 320
 321         glEnable( GL_CULL_FACE);
 322         //glEnable( GL_DEPTH_TEST );
 323     }
 324     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 325     {
 326         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 327
 328         glDisable( GL_DEPTH_TEST );
 329         glEnable( GL_BLEND );
 330         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 331     }
 332     else
 333     {
 334         msg_Warn( p_vout, "no valid opengl effect provided, using "
 335                   "\"none\"" );
 336         p_sys->i_effect = OPENGL_EFFECT_NONE;
 337     }
 338     if( val.psz_string ) free( val.psz_string );
 339
 340     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 341                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 342     {
 343         /* Set the perpective */
 344         glMatrixMode( GL_PROJECTION );
 345         glLoadIdentity();
 346         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 347         glMatrixMode( GL_MODELVIEW );
 348         glLoadIdentity();
 349         glTranslatef( 0.0, 0.0, - 5.0 );
 350     }
 351
 352     return 0;
 353 }
 354
 355 /*****************************************************************************
 356  * End: terminate GLX video thread output method
 357  *****************************************************************************/
 358 static void End( vout_thread_t *p_vout )
 359 {
 360     glFinish();
 361     glFlush();
 362 }
 363
 364 /*****************************************************************************
 365  * Destroy: destroy GLX video thread output method
 366  *****************************************************************************
 367  * Terminate an output method created by CreateVout
 368  *****************************************************************************/
 369 static void DestroyVout( vlc_object_t *p_this )
 370 {
 371     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 372     vout_sys_t *p_sys = p_vout->p_sys;
 373
 374     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 375     vlc_object_detach( p_sys->p_vout );
 376     vlc_object_destroy( p_sys->p_vout );
 377
 378     /* Free the texture buffer*/
 379     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 380     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 381
 382     free( p_sys );
 383 }
 384
 385 /*****************************************************************************
 386  * Manage: handle Sys events
 387  *****************************************************************************
 388  * This function should be called regularly by video output thread. It returns
 389  * a non null value if an error occurred.
 390  *****************************************************************************/
 391 static int Manage( vout_thread_t *p_vout )
 392 {
 393     vout_sys_t *p_sys = p_vout->p_sys;
 394     int i_ret, i_fullscreen_change;
 395
 396     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 397
 398     p_sys->p_vout->i_changes = p_vout->i_changes;
 399     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 400     p_vout->i_changes = p_sys->p_vout->i_changes;
 401
 402 #ifdef SYS_DARWIN
 403     /* On OS X, we create the window and the GL view when entering
 404        fullscreen - the textures have to be inited again */
 405     if( i_fullscreen_change )
 406     {
 407         InitTextures( p_vout );
 408
 409         switch( p_sys->i_effect )
 410         {
 411             case OPENGL_EFFECT_CUBE:
 412                 glEnable( GL_CULL_FACE );
 413                 break;
 414
 415             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 416                 glDisable( GL_DEPTH_TEST );
 417                 glEnable( GL_BLEND );
 418                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 419                 break;
 420         }
 421
 422         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 423                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 424         {
 425             /* Set the perpective */
 426             glMatrixMode( GL_PROJECTION );
 427             glLoadIdentity();
 428             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 429             glMatrixMode( GL_MODELVIEW );
 430             glLoadIdentity();
 431             glTranslatef( 0.0, 0.0, - 5.0 );
 432         }
 433     }
 434 #endif
 435
 436     return i_ret;
 437 }
 438
 439 /*****************************************************************************
 440  * Render: render previously calculated output
 441  *****************************************************************************/
 442 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 443 {
 444     vout_sys_t *p_sys = p_vout->p_sys;
 445     float f_width, f_height;
 446
 447     /* glTexCoord works differently with GL_TEXTURE_2D and
 448        GL_TEXTURE_RECTANGLE_EXT */
 449 #ifdef SYS_DARWIN
 450     f_width = (float)p_vout->output.i_width;
 451     f_height = (float)p_vout->output.i_height;
 452 #else
 453     f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 454     f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 455 #endif
 456
 457     glClear( GL_COLOR_BUFFER_BIT );
 458
 459     /* On Win32/GLX, we do this the usual way:
 460        + Fill the buffer with new content,
 461        + Reload the texture,
 462        + Use the texture.
 463
 464        On OS X with VRAM or AGP texturing, the order has to be:
 465        + Reload the texture,
 466        + Fill the buffer with new content,
 467        + Use the texture.
 468
 469        (Thanks to gcc from the Arstechnica forums for the tip)
 470
 471        Therefore, we have to use two buffers and textures. On Win32/GLX,
 472        we reload the texture to be displayed and use it right away. On
 473        OS X, we first render, then reload the texture to be used next
 474        time. */
 475
 476 #ifdef SYS_DARWIN
 477     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 478 #else
 479
 480     /* Update the texture */
 481     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 482                      p_vout->render.i_width, p_vout->render.i_height,
 483                      VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->pp_buffer[0] );
 484 #endif
 485
 486     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 487     {
 488         glEnable( VLCGL_TARGET );
 489         glBegin( GL_POLYGON );
 490         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 491         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 492         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 493         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 494         glEnd();
 495     }
 496     else
 497     {
 498         glRotatef( 1.0, 0.3, 0.5, 0.7 );
 499
 500         glEnable( VLCGL_TARGET );
 501         glBegin( GL_QUADS );
 502
 503         /* Front */
 504         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 505         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 506         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 507         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 508
 509         /* Left */
 510         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 511         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 512         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 513         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 514
 515         /* Back */
 516         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 517         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 518         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 519         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 520
 521         /* Right */
 522         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 523         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 524         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 525         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 526
 527         /* Top */
 528         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 529         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 530         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 531         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 532
 533         /* Bottom */
 534         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 535         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 536         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 537         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 538         glEnd();
 539     }
 540
 541     glDisable( VLCGL_TARGET );
 542
 543 #ifdef SYS_DARWIN
 544     /* Switch buffers */
 545     p_sys->i_index = ( p_sys->i_index + 1 ) & 1;
 546     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 547
 548     /* Update the texture */
 549     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 550     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0, p_sys->i_tex_width,
 551                      p_sys->i_tex_height, VLCGL_FORMAT, VLCGL_TYPE,
 552                      p_sys->pp_buffer[p_sys->i_index] );
 553 #endif
 554 }
 555
 556 /*****************************************************************************
 557  * DisplayVideo: displays previously rendered output
 558  *****************************************************************************/
 559 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 560 {
 561     vout_sys_t *p_sys = p_vout->p_sys;
 562     p_sys->p_vout->pf_swap( p_sys->p_vout );
 563 }
 564
 565 int GetAlignedSize( int i_size )
 566 {
 567     /* Return the nearest power of 2 */
 568     int i_result = 1;
 569     while( i_result < i_size )
 570     {
 571         i_result *= 2;
 572     }
 573     return i_result;
 574 }
 575
 576 /*****************************************************************************
 577  * Control: control facility for the vout
 578  *****************************************************************************/
 579 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 580 {
 581     vout_sys_t *p_sys = p_vout->p_sys;
 582
 583     if( p_sys->p_vout->pf_control )
 584         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 585     else
 586         return vout_vaControlDefault( p_vout, i_query, args );
 587 }
 588
 589 static int InitTextures( vout_thread_t *p_vout )
 590 {
 591     vout_sys_t *p_sys = p_vout->p_sys;
 592     int i_index;
 593
 594     glDeleteTextures( 2, p_sys->p_textures );
 595     glGenTextures( 2, p_sys->p_textures );
 596
 597     for( i_index = 0; i_index < 2; i_index++ )
 598     {
 599         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 600
 601         /* Set the texture parameters */
 602         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 603
 604         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 605         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 606
 607         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP );
 608         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP );
 609
 610         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 611
 612 #ifdef SYS_DARWIN
 613         /* Tell the driver not to make a copy of the texture but to use
 614            our buffer */
 615         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 616         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 617
 618 #if 0
 619         /* Use VRAM texturing */
 620         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 621                          GL_STORAGE_CACHED_APPLE );
 622 #else
 623         /* Use AGP texturing */
 624         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 625                          GL_STORAGE_SHARED_APPLE );
 626 #endif
 627 #endif
 628
 629         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 630         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 631                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 632                       p_sys->pp_buffer[i_index] );
 633     }
 634
 635     return 0;
 636 }
 637
 638 /*****************************************************************************
 639  * SendEvents: forward mouse and keyboard events to the parent p_vout
 640  *****************************************************************************/
 641 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 642                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 643 {
 644     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 645 }