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