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