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  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <errno.h>                                                 /* ENOMEM */
  30 #include <stdlib.h>                                      /* malloc(), free() */
  31 #include <string.h>
  32
  33 #include <vlc/vlc.h>
  34 #include <vlc/vout.h>
  35
  36 #ifdef __APPLE__
  37 #include <OpenGL/gl.h>
  38 #include <OpenGL/glext.h>
  39
  40 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  41    This allows sizes which are not powers of 2 */
  42 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  43
  44 /* OS X OpenGL supports YUV. Hehe. */
  45 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  46 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  47 #else
  48
  49 #include <GL/gl.h>
  50 #define VLCGL_TARGET GL_TEXTURE_2D
  51
  52 /* RV16 */
  53 #ifndef GL_UNSIGNED_SHORT_5_6_5
  54 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  55 #endif
  56 //#define VLCGL_RGB_FORMAT GL_RGB
  57 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  58
  59 /* RV24 */
  60 //#define VLCGL_RGB_FORMAT GL_RGB
  61 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  62
  63 /* RV32 */
  64 #define VLCGL_RGB_FORMAT GL_RGBA
  65 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  66
  67 /* YUY2 */
  68 #ifndef YCBCR_MESA
  69 #define YCBCR_MESA 0x8757
  70 #endif
  71 #ifndef UNSIGNED_SHORT_8_8_MESA
  72 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
  73 #endif
  74 #define VLCGL_YUV_FORMAT YCBCR_MESA
  75 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  76
  77 /* Use RGB on Win32/GLX */
  78 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
  79 #define VLCGL_TYPE   VLCGL_RGB_TYPE
  80 //#define VLCGL_FORMAT VLCGL_YUV_FORMAT
  81 //#define VLCGL_TYPE   VLCGL_YUV_TYPE
  82 #endif
  83
  84 #ifndef GL_CLAMP_TO_EDGE
  85 #   define GL_CLAMP_TO_EDGE 0x812F
  86 #endif
  87
  88 /* OpenGL effects */
  89 #define OPENGL_EFFECT_NONE             1
  90 #define OPENGL_EFFECT_CUBE             2
  91 #define OPENGL_EFFECT_TRANSPARENT_CUBE 4
  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 /*****************************************************************************
 112  * Module descriptor
 113  *****************************************************************************/
 114 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 115 /*****************************************************************************
 116  * Module descriptor
 117  *****************************************************************************/
 118 #define SPEED_TEXT N_( "OpenGL cube rotation speed" )
 119 #define SPEED_LONGTEXT N_( "Rotation speed of the OpenGL cube effect, if " \
 120         "enabled." )
 121
 122 #define EFFECT_TEXT N_("Effect")
 123 #define EFFECT_LONGTEXT N_( \
 124     "Several OpenGL visual effects are available." )
 125
 126 static char *ppsz_effects[] = {
 127         "none", "cube", "transparent-cube" };
 128 static char *ppsz_effects_text[] = {
 129         N_("None"), N_("Cube"), N_("Transparent Cube") };
 130
 131 vlc_module_begin();
 132     set_shortname( "OpenGL" );
 133     set_category( CAT_VIDEO );
 134     set_subcategory( SUBCAT_VIDEO_VOUT );
 135     set_description( _("OpenGL video output") );
 136 #ifdef __APPLE__
 137     set_capability( "video output", 200 );
 138 #else
 139     set_capability( "video output", 20 );
 140 #endif
 141     add_shortcut( "opengl" );
 142     add_float( "opengl-cube-speed", 2.0, NULL, SPEED_TEXT,
 143                     SPEED_LONGTEXT, VLC_TRUE );
 144     set_callbacks( CreateVout, DestroyVout );
 145     add_string( "opengl-effect", "none", NULL, EFFECT_TEXT,
 146                  EFFECT_LONGTEXT, VLC_FALSE );
 147         change_string_list( ppsz_effects, ppsz_effects_text, 0 );
 148 vlc_module_end();
 149
 150 /*****************************************************************************
 151  * vout_sys_t: video output method descriptor
 152  *****************************************************************************
 153  * This structure is part of the video output thread descriptor.
 154  * It describes the OpenGL specific properties of the output thread.
 155  *****************************************************************************/
 156 struct vout_sys_t
 157 {
 158     vout_thread_t *p_vout;
 159
 160     uint8_t    *pp_buffer[2];
 161     int         i_index;
 162     int         i_tex_width;
 163     int         i_tex_height;
 164     GLuint      p_textures[2];
 165
 166     int         i_effect;
 167
 168     float       f_speed;
 169 };
 170
 171 /*****************************************************************************
 172  * CreateVout: This function allocates and initializes the OpenGL vout method.
 173  *****************************************************************************/
 174 static int CreateVout( vlc_object_t *p_this )
 175 {
 176     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 177     vout_sys_t *p_sys;
 178
 179     /* Allocate structure */
 180     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 181     if( p_sys == NULL )
 182     {
 183         msg_Err( p_vout, "out of memory" );
 184         return VLC_EGENERIC;
 185     }
 186
 187     var_Create( p_vout, "opengl-effect", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 188
 189     p_sys->i_index = 0;
 190 #ifdef __APPLE__
 191     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 192     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 193 #else
 194     /* A texture must have a size aligned on a power of 2 */
 195     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
 196     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
 197 #endif
 198
 199     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 200              p_sys->i_tex_height );
 201
 202     /* Get window */
 203     p_sys->p_vout =
 204         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 205     if( p_sys->p_vout == NULL )
 206     {
 207         msg_Err( p_vout, "out of memory" );
 208         return VLC_ENOMEM;
 209     }
 210     vlc_object_attach( p_sys->p_vout, p_this );
 211
 212     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 213     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 214     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 215     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 216     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 217     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 218     p_sys->p_vout->fmt_render = p_vout->fmt_render;
 219     p_sys->p_vout->fmt_in = p_vout->fmt_in;
 220     p_sys->p_vout->b_scale = p_vout->b_scale;
 221     p_sys->p_vout->i_alignment = p_vout->i_alignment;
 222
 223     p_sys->p_vout->p_module =
 224         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 225     if( p_sys->p_vout->p_module == NULL )
 226     {
 227         msg_Warn( p_vout, "No OpenGL provider found" );
 228         vlc_object_detach( p_sys->p_vout );
 229         vlc_object_destroy( p_sys->p_vout );
 230         return VLC_ENOOBJ;
 231     }
 232
 233     p_sys->f_speed = var_CreateGetFloat( p_vout, "opengl-cube-speed" );
 234
 235     p_vout->pf_init = Init;
 236     p_vout->pf_end = End;
 237     p_vout->pf_manage = Manage;
 238     p_vout->pf_render = Render;
 239     p_vout->pf_display = DisplayVideo;
 240     p_vout->pf_control = Control;
 241
 242     /* Forward events from the opengl provider */
 243     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
 244     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
 245     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
 246     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_INTEGER );
 247     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
 248     var_Create( p_sys->p_vout, "video-on-top",
 249                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 250
 251     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
 252     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
 253     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
 254     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
 255     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
 256
 257     return VLC_SUCCESS;
 258 }
 259
 260 /*****************************************************************************
 261  * Init: initialize the OpenGL video thread output method
 262  *****************************************************************************/
 263 static int Init( vout_thread_t *p_vout )
 264 {
 265     vout_sys_t *p_sys = p_vout->p_sys;
 266     int i_pixel_pitch;
 267     vlc_value_t val;
 268
 269     p_sys->p_vout->pf_init( p_sys->p_vout );
 270
 271 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
 272 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 273     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 274     i_pixel_pitch = 2;
 275
 276 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 277     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 278     i_pixel_pitch = 2;
 279
 280 #elif VLCGL_FORMAT == GL_RGB
 281 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
 282     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 283     p_vout->output.i_rmask = 0x000000ff;
 284     p_vout->output.i_gmask = 0x0000ff00;
 285     p_vout->output.i_bmask = 0x00ff0000;
 286     i_pixel_pitch = 3;
 287 #   else
 288     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 289     p_vout->output.i_rmask = 0xf800;
 290     p_vout->output.i_gmask = 0x07e0;
 291     p_vout->output.i_bmask = 0x001f;
 292     i_pixel_pitch = 2;
 293 #   endif
 294 #else
 295     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 296     p_vout->output.i_rmask = 0x000000ff;
 297     p_vout->output.i_gmask = 0x0000ff00;
 298     p_vout->output.i_bmask = 0x00ff0000;
 299     i_pixel_pitch = 4;
 300 #endif
 301
 302     /* Since OpenGL can do rescaling for us, stick to the default
 303      * coordinates and aspect. */
 304     p_vout->output.i_width  = p_vout->render.i_width;
 305     p_vout->output.i_height = p_vout->render.i_height;
 306     p_vout->output.i_aspect = p_vout->render.i_aspect;
 307
 308     p_vout->fmt_out = p_vout->fmt_in;
 309     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 310
 311     /* We know the chroma, allocate one buffer which will be used
 312      * directly by the decoder */
 313     p_sys->pp_buffer[0] =
 314         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 315     if( !p_sys->pp_buffer[0] )
 316     {
 317         msg_Err( p_vout, "Out of memory" );
 318         return -1;
 319     }
 320     p_sys->pp_buffer[1] =
 321         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 322     if( !p_sys->pp_buffer[1] )
 323     {
 324         msg_Err( p_vout, "Out of memory" );
 325         return -1;
 326     }
 327
 328     p_vout->p_picture[0].i_planes = 1;
 329     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
 330     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 331     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 332     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 333     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 334         p_vout->p_picture[0].p->i_pixel_pitch;
 335     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 336         p_vout->p_picture[0].p->i_pixel_pitch;
 337
 338     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 339     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 340
 341     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 342
 343     I_OUTPUTPICTURES = 1;
 344
 345     if( p_sys->p_vout->pf_lock &&
 346         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 347     {
 348         msg_Warn( p_vout, "could not lock OpenGL provider" );
 349         return 0;
 350     }
 351
 352     InitTextures( p_vout );
 353
 354     glDisable(GL_BLEND);
 355     glDisable(GL_DEPTH_TEST);
 356     glDepthMask(GL_FALSE);
 357     glDisable(GL_CULL_FACE);
 358     glClear( GL_COLOR_BUFFER_BIT );
 359
 360     /* Check if the user asked for useless visual effects */
 361     var_Get( p_vout, "opengl-effect", &val );
 362     if( !val.psz_string || !strcmp( val.psz_string, "none" ))
 363     {
 364         p_sys->i_effect = OPENGL_EFFECT_NONE;
 365     }
 366     else if( !strcmp( val.psz_string, "cube" ) )
 367     {
 368         p_sys->i_effect = OPENGL_EFFECT_CUBE;
 369
 370         glEnable( GL_CULL_FACE);
 371         //glEnable( GL_DEPTH_TEST );
 372     }
 373     else if( !strcmp( val.psz_string, "transparent-cube" ) )
 374     {
 375         p_sys->i_effect = OPENGL_EFFECT_TRANSPARENT_CUBE;
 376
 377         glDisable( GL_DEPTH_TEST );
 378         glEnable( GL_BLEND );
 379         glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 380     }
 381     else
 382     {
 383         msg_Warn( p_vout, "no valid opengl effect provided, using "
 384                   "\"none\"" );
 385         p_sys->i_effect = OPENGL_EFFECT_NONE;
 386     }
 387     if( val.psz_string ) free( val.psz_string );
 388
 389     if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 390                 OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 391     {
 392         /* Set the perpective */
 393         glMatrixMode( GL_PROJECTION );
 394         glLoadIdentity();
 395         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 396         glMatrixMode( GL_MODELVIEW );
 397         glLoadIdentity();
 398         glTranslatef( 0.0, 0.0, - 5.0 );
 399     }
 400
 401     if( p_sys->p_vout->pf_unlock )
 402     {
 403         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 404     }
 405
 406     return 0;
 407 }
 408
 409 /*****************************************************************************
 410  * End: terminate GLX video thread output method
 411  *****************************************************************************/
 412 static void End( vout_thread_t *p_vout )
 413 {
 414     vout_sys_t *p_sys = p_vout->p_sys;
 415
 416     if( p_sys->p_vout->pf_lock &&
 417         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 418     {
 419         msg_Warn( p_vout, "could not lock OpenGL provider" );
 420         return;
 421     }
 422
 423     glFinish();
 424     glFlush();
 425
 426     if( p_sys->p_vout->pf_unlock )
 427     {
 428         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 429     }
 430 }
 431
 432 /*****************************************************************************
 433  * Destroy: destroy GLX video thread output method
 434  *****************************************************************************
 435  * Terminate an output method created by CreateVout
 436  *****************************************************************************/
 437 static void DestroyVout( vlc_object_t *p_this )
 438 {
 439     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 440     vout_sys_t *p_sys = p_vout->p_sys;
 441
 442     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 443     vlc_object_detach( p_sys->p_vout );
 444     vlc_object_destroy( p_sys->p_vout );
 445
 446     /* Free the texture buffer*/
 447     if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
 448     if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
 449
 450     free( p_sys );
 451 }
 452
 453 /*****************************************************************************
 454  * Manage: handle Sys events
 455  *****************************************************************************
 456  * This function should be called regularly by video output thread. It returns
 457  * a non null value if an error occurred.
 458  *****************************************************************************/
 459 static int Manage( vout_thread_t *p_vout )
 460 {
 461     vout_sys_t *p_sys = p_vout->p_sys;
 462     int i_ret, i_fullscreen_change;
 463
 464     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
 465
 466     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
 467         p_vout->fmt_in.i_x_offset;
 468     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
 469         p_vout->fmt_in.i_y_offset;
 470     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
 471         p_vout->fmt_in.i_visible_width;
 472     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
 473         p_vout->fmt_in.i_visible_height;
 474     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
 475         p_vout->fmt_in.i_aspect;
 476     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
 477         p_vout->fmt_in.i_sar_num;
 478     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
 479         p_vout->fmt_in.i_sar_den;
 480     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
 481
 482     p_sys->p_vout->i_changes = p_vout->i_changes;
 483     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
 484     p_vout->i_changes = p_sys->p_vout->i_changes;
 485
 486 #ifdef __APPLE__
 487     if( p_sys->p_vout->pf_lock &&
 488         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 489     {
 490         msg_Warn( p_vout, "could not lock OpenGL provider" );
 491         return i_ret;
 492     }
 493
 494     /* On OS X, we create the window and the GL view when entering
 495        fullscreen - the textures have to be inited again */
 496     if( i_fullscreen_change )
 497     {
 498         InitTextures( p_vout );
 499
 500         switch( p_sys->i_effect )
 501         {
 502             case OPENGL_EFFECT_CUBE:
 503                 glEnable( GL_CULL_FACE );
 504                 break;
 505
 506             case OPENGL_EFFECT_TRANSPARENT_CUBE:
 507                 glDisable( GL_DEPTH_TEST );
 508                 glEnable( GL_BLEND );
 509                 glBlendFunc( GL_SRC_ALPHA, GL_ONE );
 510                 break;
 511         }
 512
 513         if( p_sys->i_effect & ( OPENGL_EFFECT_CUBE |
 514                     OPENGL_EFFECT_TRANSPARENT_CUBE ) )
 515         {
 516             /* Set the perpective */
 517             glMatrixMode( GL_PROJECTION );
 518             glLoadIdentity();
 519             glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 520             glMatrixMode( GL_MODELVIEW );
 521             glLoadIdentity();
 522             glTranslatef( 0.0, 0.0, - 5.0 );
 523         }
 524     }
 525
 526     if( p_sys->p_vout->pf_unlock )
 527     {
 528         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 529     }
 530 #endif
 531
 532     return i_ret;
 533 }
 534
 535 /*****************************************************************************
 536  * Render: render previously calculated output
 537  *****************************************************************************/
 538 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 539 {
 540     vout_sys_t *p_sys = p_vout->p_sys;
 541
 542     /* On Win32/GLX, we do this the usual way:
 543        + Fill the buffer with new content,
 544        + Reload the texture,
 545        + Use the texture.
 546
 547        On OS X with VRAM or AGP texturing, the order has to be:
 548        + Reload the texture,
 549        + Fill the buffer with new content,
 550        + Use the texture.
 551
 552        (Thanks to gcc from the Arstechnica forums for the tip)
 553
 554        Therefore, we have to use two buffers and textures. On Win32/GLX,
 555        we reload the texture to be displayed and use it right away. On
 556        OS X, we first render, then reload the texture to be used next
 557        time. */
 558
 559     if( p_sys->p_vout->pf_lock &&
 560         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 561     {
 562         msg_Warn( p_vout, "could not lock OpenGL provider" );
 563         return;
 564     }
 565
 566 #ifdef __APPLE__
 567     int i_new_index;
 568     i_new_index = ( p_sys->i_index + 1 ) & 1;
 569
 570
 571     /* Update the texture */
 572     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 573     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 574                      p_vout->fmt_out.i_width,
 575                      p_vout->fmt_out.i_height,
 576                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 577
 578     /* Bind to the previous texture for drawing */
 579     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 580
 581     /* Switch buffers */
 582     p_sys->i_index = i_new_index;
 583     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 584
 585 #else
 586     /* Update the texture */
 587     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
 588                      p_vout->fmt_out.i_width,
 589                      p_vout->fmt_out.i_height,
 590                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
 591 #endif
 592
 593     if( p_sys->p_vout->pf_unlock )
 594     {
 595         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 596     }
 597 }
 598
 599 /*****************************************************************************
 600  * DisplayVideo: displays previously rendered output
 601  *****************************************************************************/
 602 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 603 {
 604     vout_sys_t *p_sys = p_vout->p_sys;
 605     float f_width, f_height, f_x, f_y;
 606
 607     if( p_sys->p_vout->pf_lock &&
 608         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
 609     {
 610         msg_Warn( p_vout, "could not lock OpenGL provider" );
 611         return;
 612     }
 613
 614     /* glTexCoord works differently with GL_TEXTURE_2D and
 615        GL_TEXTURE_RECTANGLE_EXT */
 616 #ifdef __APPLE__
 617     f_x = (float)p_vout->fmt_out.i_x_offset;
 618     f_y = (float)p_vout->fmt_out.i_y_offset;
 619     f_width = (float)p_vout->fmt_out.i_x_offset +
 620               (float)p_vout->fmt_out.i_visible_width;
 621     f_height = (float)p_vout->fmt_out.i_y_offset +
 622                (float)p_vout->fmt_out.i_visible_height;
 623 #else
 624     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
 625     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
 626     f_width = ( (float)p_vout->fmt_out.i_x_offset +
 627                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
 628     f_height = ( (float)p_vout->fmt_out.i_y_offset +
 629                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
 630 #endif
 631
 632     /* Why drawing here and not in Render()? Because this way, the
 633        OpenGL providers can call pf_display to force redraw. Currently,
 634        the OS X provider uses it to get a smooth window resizing */
 635
 636     glClear( GL_COLOR_BUFFER_BIT );
 637
 638     if( p_sys->i_effect == OPENGL_EFFECT_NONE )
 639     {
 640         glEnable( VLCGL_TARGET );
 641         glBegin( GL_POLYGON );
 642         glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 643         glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 644         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 645         glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 646         glEnd();
 647     }
 648     else
 649     {
 650         glRotatef( 0.5 * p_sys->f_speed , 0.3, 0.5, 0.7 );
 651
 652         glEnable( VLCGL_TARGET );
 653         glBegin( GL_QUADS );
 654
 655         /* Front */
 656         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, 1.0 );
 657         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 658         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 659         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, 1.0 );
 660
 661         /* Left */
 662         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 663         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 664         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 665         glTexCoord2f( f_width, f_y ); glVertex3f( - 1.0, 1.0, 1.0 );
 666
 667         /* Back */
 668         glTexCoord2f( f_x, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 669         glTexCoord2f( f_x, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 670         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 671         glTexCoord2f( f_width, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 672
 673         /* Right */
 674         glTexCoord2f( f_x, f_y ); glVertex3f( 1.0, 1.0, 1.0 );
 675         glTexCoord2f( f_x, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 676         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 677         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 678
 679         /* Top */
 680         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, 1.0, - 1.0 );
 681         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 682         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 683         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, 1.0, - 1.0 );
 684
 685         /* Bottom */
 686         glTexCoord2f( f_x, f_y ); glVertex3f( - 1.0, - 1.0, 1.0 );
 687         glTexCoord2f( f_x, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 688         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 689         glTexCoord2f( f_width, f_y ); glVertex3f( 1.0, - 1.0, 1.0 );
 690         glEnd();
 691     }
 692
 693     glDisable( VLCGL_TARGET );
 694
 695     p_sys->p_vout->pf_swap( p_sys->p_vout );
 696
 697     if( p_sys->p_vout->pf_unlock )
 698     {
 699         p_sys->p_vout->pf_unlock( p_sys->p_vout );
 700     }
 701 }
 702
 703 int GetAlignedSize( int i_size )
 704 {
 705     /* Return the nearest power of 2 */
 706     int i_result = 1;
 707     while( i_result < i_size )
 708     {
 709         i_result *= 2;
 710     }
 711     return i_result;
 712 }
 713
 714 /*****************************************************************************
 715  * Control: control facility for the vout
 716  *****************************************************************************/
 717 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 718 {
 719     vout_sys_t *p_sys = p_vout->p_sys;
 720
 721     switch( i_query )
 722     {
 723     case VOUT_SNAPSHOT:
 724         return vout_vaControlDefault( p_vout, i_query, args );
 725
 726     default:
 727         if( p_sys->p_vout->pf_control )
 728             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 729         else
 730             return vout_vaControlDefault( p_vout, i_query, args );
 731     }
 732 }
 733
 734 static int InitTextures( vout_thread_t *p_vout )
 735 {
 736     vout_sys_t *p_sys = p_vout->p_sys;
 737     int i_index;
 738
 739     glDeleteTextures( 2, p_sys->p_textures );
 740     glGenTextures( 2, p_sys->p_textures );
 741
 742     for( i_index = 0; i_index < 2; i_index++ )
 743     {
 744         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 745
 746         /* Set the texture parameters */
 747         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 748
 749         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 750         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 751
 752         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 753         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 754
 755         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 756
 757 #ifdef __APPLE__
 758         /* Tell the driver not to make a copy of the texture but to use
 759            our buffer */
 760         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 761         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 762
 763 #if 0
 764         /* Use VRAM texturing */
 765         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 766                          GL_STORAGE_CACHED_APPLE );
 767 #else
 768         /* Use AGP texturing */
 769         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
 770                          GL_STORAGE_SHARED_APPLE );
 771 #endif
 772 #endif
 773
 774         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 775         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
 776                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 777                       p_sys->pp_buffer[i_index] );
 778     }
 779
 780     return 0;
 781 }
 782
 783 /*****************************************************************************
 784  * SendEvents: forward mouse and keyboard events to the parent p_vout
 785  *****************************************************************************/
 786 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 787                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 788 {
 789     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
 790 }