git.sesse.net Git - vlc/blob - plugins/macosx/vout_macosx.c

   1 /*****************************************************************************
   2  * vout_macosx.c: MacOS X video output plugin
   3  *****************************************************************************
   4  * Copyright (C) 2001 VideoLAN
   5  *
   6  * Authors: Colin Delacroix <colin@zoy.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 #include "modules_inner.h"
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include "defs.h"
  29
  30 #include <errno.h>                                                 /* ENOMEM */
  31 #include <stdlib.h>                                                /* free() */
  32 #include <string.h>                                            /* strerror() */
  33
  34 #include "config.h"
  35 #include "common.h"
  36 #include "threads.h"
  37 #include "mtime.h"
  38 #include "tests.h"
  39
  40 #include "intf_msg.h"
  41
  42 #include "video.h"
  43 #include "video_output.h"
  44
  45 #include "modules.h"
  46 #include "main.h"
  47
  48 #include "macosx_common.h"
  49
  50
  51 /*****************************************************************************
  52  * Constants & more
  53  *****************************************************************************/
  54
  55 // Initial Window Constants
  56 enum
  57 {
  58     kWindowOffset = 100
  59 };
  60
  61 // where is the off screen
  62 enum
  63 {
  64     kNoWhere = 0,
  65     kInVRAM,
  66     kInAGP,
  67     kInSystem
  68 };
  69
  70
  71 /*****************************************************************************
  72  * Local prototypes
  73  *****************************************************************************/
  74 static int  vout_Probe     ( probedata_t *p_data );
  75 static int  vout_Create    ( struct vout_thread_s * );
  76 static int  vout_Init      ( struct vout_thread_s * );
  77 static void vout_End       ( struct vout_thread_s * );
  78 static void vout_Destroy   ( struct vout_thread_s * );
  79 static int  vout_Manage    ( struct vout_thread_s * );
  80 static void vout_Display   ( struct vout_thread_s * );
  81
  82 /* OS specific */
  83
  84 static int CreateDisplay        ( struct vout_thread_s * );
  85 static int MakeWindow           ( struct vout_thread_s * );
  86 static int AllocBuffer          ( struct vout_thread_s * , short index );
  87
  88 void BlitToWindow               ( struct vout_thread_s * , short index );
  89 GDHandle GetWindowDevice        ( struct vout_thread_s * );
  90 void FillOffscreen              ( struct vout_thread_s * , short index);
  91
  92 void FindBestMemoryLocation( struct vout_thread_s * );
  93
  94 /*****************************************************************************
  95  * Functions exported as capabilities. They are declared as static so that
  96  * we don't pollute the namespace too much.
  97  *****************************************************************************/
  98 void _M( vout_getfunctions )( function_list_t * p_function_list )
  99 {
 100     p_function_list->pf_probe = vout_Probe;
 101     p_function_list->functions.vout.pf_create     = vout_Create;
 102     p_function_list->functions.vout.pf_init       = vout_Init;
 103     p_function_list->functions.vout.pf_end        = vout_End;
 104     p_function_list->functions.vout.pf_destroy    = vout_Destroy;
 105     p_function_list->functions.vout.pf_manage     = vout_Manage;
 106     p_function_list->functions.vout.pf_display    = vout_Display;
 107     p_function_list->functions.vout.pf_setpalette = NULL;
 108 }
 109
 110 /*****************************************************************************
 111  * intf_Probe: return a score
 112  *****************************************************************************/
 113 static int vout_Probe( probedata_t *p_data )
 114 {
 115     if( TestMethod( VOUT_METHOD_VAR, "macosx" ) )
 116     {
 117         return( 999 );
 118     }
 119
 120     return( 100 );
 121 }
 122
 123 /*****************************************************************************
 124  * vout_Create: allocates MacOS X video thread output method
 125  *****************************************************************************
 126  * This function allocates and initializes a MacOS X vout method.
 127  *****************************************************************************/
 128 static int vout_Create( vout_thread_t *p_vout )
 129 {
 130     //intf_ErrMsg( "vout_Create()" );
 131
 132     /* Allocate structure */
 133     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 134     if( p_vout->p_sys == NULL )
 135     {
 136         intf_ErrMsg( "error: %s", strerror( ENOMEM ) );
 137         return( 1 );
 138     }
 139
 140     p_vout->p_sys->gwLocOffscreen = kNoWhere;
 141     p_vout->p_sys->p_window       = NULL;
 142     p_vout->p_sys->p_gw[ 0 ]      = NULL;
 143     p_vout->p_sys->p_gw[ 1 ]      = NULL;
 144
 145     if ( CreateDisplay( p_vout ) )
 146     {
 147         intf_ErrMsg( "vout error: can't open display" );
 148         free( p_vout->p_sys );
 149         return( 1 );
 150     }
 151
 152 #if 0
 153     intf_ErrMsg( "vout p_vout->i_width %d" , p_vout->i_width);
 154     intf_ErrMsg( "vout p_vout->i_height %d" , p_vout->i_height);
 155     intf_ErrMsg( "vout p_vout->i_bytes_per_pixel %d" , p_vout->i_bytes_per_pixel);
 156     intf_ErrMsg( "vout p_vout->i_screen_depth %d" , p_vout->i_screen_depth);
 157 #endif
 158
 159     return( 0 );
 160 }
 161
 162 /*****************************************************************************
 163  * Find the best memory (AGP, VRAM, system) location
 164  *****************************************************************************/
 165 void FindBestMemoryLocation( vout_thread_t *p_vout )
 166 {
 167     long versionSystem;
 168
 169     Gestalt( gestaltSystemVersion, &versionSystem );
 170     if ( 0x00000900 <= ( versionSystem & 0x00000FF00  ) )
 171     {
 172         intf_ErrMsg( "FindBestMemoryLocation : gNewNewGWorld = true" );
 173         p_vout->p_sys->gNewNewGWorld = true;
 174     }
 175     else
 176     {
 177         // now it is tricky
 178         // we will try to allocate in VRAM and find out where the allocation really ended up.
 179         GWorldPtr pgwTest = NULL;
 180         Rect rectTest = {0, 0, 10, 10};
 181         short wPixDepth =
 182             (**(GetPortPixMap( GetWindowPort( p_vout->p_sys->p_window ) ))).pixelSize;
 183         GDHandle hgdWindow = GetWindowDevice( p_vout );
 184
 185         intf_ErrMsg( "FindBestMemoryLocation : gNewNewGWorld = false !" );
 186 #if 0
 187         p_vout->i_screen_depth = wPixDepth;
 188         p_vout->i_bytes_per_pixel = wPixDepth;
 189         p_vout->i_bytes_per_line = (**(**hgdWindow).gdPMap).rowBytes & 0x3FFF ;
 190 #endif
 191         if(    ( noErr == NewGWorld( &pgwTest, wPixDepth, &rectTest, NULL, hgdWindow,
 192                                      noNewDevice | useDistantHdwrMem ) )
 193             && ( pgwTest ) )
 194         {
 195             p_vout->p_sys->gNewNewGWorld = true;
 196         }
 197
 198         if( pgwTest )
 199         {
 200             DisposeGWorld( pgwTest );
 201         }
 202     }
 203 }
 204
 205 /*****************************************************************************
 206  * CreateDisplay: setup display params...
 207  *****************************************************************************/
 208 static int CreateDisplay( vout_thread_t *p_vout )
 209 {
 210     PixMapHandle hPixmap0, hPixmap1;
 211     void * hPixmapBaseAddr0, * hPixmapBaseAddr1;
 212
 213     //intf_ErrMsg( "CreateDisplay()" );
 214
 215     if( MakeWindow( p_vout ) )
 216     {
 217         intf_ErrMsg( "vout error: can't open window display" );
 218         return( 1 );
 219     }
 220
 221     // FindBestMemoryLocation( p_vout );
 222
 223     //try to allocate @ best location, will eventaully trickle down to worst
 224     p_vout->p_sys->gwLocOffscreen = kInVRAM;
 225     if( AllocBuffer( p_vout, 0 ) || AllocBuffer( p_vout, 1 ) )
 226     {
 227         intf_ErrMsg( "vout error: can't alloc offscreen buffers" );
 228         return( 1 );
 229     }
 230
 231 //FIXME ? - lock this down until the end...
 232     hPixmap0 = GetGWorldPixMap( p_vout->p_sys->p_gw[0] );
 233     LockPixels(hPixmap0);
 234     hPixmap1 = GetGWorldPixMap( p_vout->p_sys->p_gw[1] );
 235     LockPixels(hPixmap1);
 236
 237     //FIXME hopefully this is the same for all Gworlds & window since they are the same size
 238     p_vout->i_bytes_per_line = (**hPixmap0).rowBytes & 0x3FFF;
 239
 240     if ( (hPixmap0 == NULL) || (hPixmap1 == NULL) )
 241     {
 242         intf_ErrMsg( "vout error: pixmap problem");
 243         UnlockPixels(hPixmap0);
 244         UnlockPixels(hPixmap1);
 245         return( 1 );
 246     }
 247
 248     hPixmapBaseAddr0 = GetPixBaseAddr( hPixmap0 );
 249     hPixmapBaseAddr1 = GetPixBaseAddr( hPixmap1 );
 250     if ( (hPixmapBaseAddr0 == NULL) || (hPixmapBaseAddr1 == NULL) )
 251     {
 252         intf_ErrMsg( "vout error: pixmap base addr problem");
 253         return( 1 );
 254     }
 255
 256 //FIXME - if I ever dispose of the Gworlds and recreate them, i'll have a new address
 257 //and I'll need to tell vout about them...  dunno what problems vout might have if we just updateGworld
 258     p_vout->pf_setbuffers( p_vout, hPixmapBaseAddr0, hPixmapBaseAddr1 );
 259
 260     return 0;
 261 }
 262
 263 /*****************************************************************************
 264  * MakeWindow: open and set-up a Mac OS main window
 265  *****************************************************************************/
 266 static int MakeWindow( vout_thread_t *p_vout )
 267 {
 268     int left = 0;
 269     int top = 0;
 270     int bottom = p_vout->i_height;
 271     int right = p_vout->i_width;
 272     ProcessSerialNumber PSN;
 273
 274     WindowAttributes windowAttr = kWindowStandardDocumentAttributes |
 275                                     kWindowStandardHandlerAttribute |
 276                                     kWindowInWindowMenuAttribute;
 277
 278     SetRect( &p_vout->p_sys->wrect, left, top, right, bottom );
 279     OffsetRect( &p_vout->p_sys->wrect, kWindowOffset, kWindowOffset );
 280
 281     CreateNewWindow( kDocumentWindowClass, windowAttr, &p_vout->p_sys->wrect, &p_vout->p_sys->p_window );
 282     if ( p_vout->p_sys->p_window == nil )
 283     {
 284         return( 1 );
 285     }
 286
 287     InstallStandardEventHandler(GetWindowEventTarget(p_vout->p_sys->p_window));
 288     SetPort( GetWindowPort( p_vout->p_sys->p_window ) );
 289     SetWindowTitleWithCFString( p_vout->p_sys->p_window, CFSTR("VLC") );
 290     ShowWindow( p_vout->p_sys->p_window );
 291     SelectWindow( p_vout->p_sys->p_window );
 292
 293     //in case we are run from the command line, bring us to front instead of Terminal
 294     GetCurrentProcess(&PSN);
 295     SetFrontProcess(&PSN);
 296
 297 {
 298     short wPixDepth = (**(GetPortPixMap( GetWindowPort( p_vout->p_sys->p_window ) ))).pixelSize;
 299     p_vout->i_screen_depth = wPixDepth;
 300     p_vout->i_bytes_per_pixel = p_vout->i_screen_depth / 8;
 301     p_vout->i_bytes_per_line   = p_vout->i_width * p_vout->i_bytes_per_pixel;
 302
 303     p_vout->i_bytes_per_line = (**(**GetWindowDevice( p_vout )).gdPMap).rowBytes & 0x3FFF ;
 304
 305     switch ( p_vout->i_screen_depth )
 306     {
 307         case 32:
 308         case 24:
 309             p_vout->i_red_mask =   0xff0000;
 310             p_vout->i_green_mask = 0xff00;
 311             p_vout->i_blue_mask =  0xff;
 312             break;
 313         case 16:
 314         case 15:
 315             p_vout->i_red_mask =   0x00007c00;
 316             p_vout->i_green_mask = 0x000003e0;
 317             p_vout->i_blue_mask =  0x0000001f;
 318             break;
 319         default:
 320             break;
 321     }
 322 }
 323
 324 #if 0
 325     p_vout->i_red_lshift = 0x10;
 326     p_vout->i_red_rshift = 0x0;
 327     p_vout->i_green_lshift = 0x8;
 328     p_vout->i_green_rshift = 0x0;
 329     p_vout->i_blue_lshift = 0x0;
 330     p_vout->i_blue_rshift = 0x0;
 331
 332     p_vout->i_white_pixel = 0xffffff;
 333     p_vout->i_black_pixel = 0x0;
 334     p_vout->i_gray_pixel = 0x808080;
 335     p_vout->i_blue_pixel = 0x32;
 336 #endif
 337
 338     return( 0 );
 339 }
 340
 341 /*****************************************************************************
 342  * AllocBuffer: forces offscreen allocation (if different than current) in
 343  * memory type specified
 344  *****************************************************************************/
 345 static int AllocBuffer ( vout_thread_t *p_vout, short index )
 346 {
 347     Rect bounds;
 348     GDHandle hgdWindow = GetWindowDevice( p_vout );
 349
 350     switch ( p_vout->p_sys->gwLocOffscreen )
 351     {
 352         case kInVRAM:
 353             if ( noErr == NewGWorld( &p_vout->p_sys->p_gw[index], p_vout->i_screen_depth,
 354                 GetPortBounds( GetWindowPort( p_vout->p_sys->p_window ), &bounds ), NULL,
 355                 hgdWindow, noNewDevice | useDistantHdwrMem ) )
 356             {
 357                 intf_ErrMsg( "Allocate off screen image in VRAM" );
 358                 break;
 359             }
 360             intf_ErrMsg( "Unable to allocate off screen image in VRAM, trying next best AGP" );
 361             p_vout->p_sys->gwLocOffscreen = kInAGP;
 362         case kInAGP:
 363             if (noErr == NewGWorld( &p_vout->p_sys->p_gw[index], p_vout->i_screen_depth,
 364                 GetPortBounds( GetWindowPort( p_vout->p_sys->p_window ), &bounds ), NULL,
 365                 hgdWindow, noNewDevice | useLocalHdwrMem ) )
 366             {
 367                 intf_ErrMsg( "Allocate off screen image in AGP" );
 368                 break;
 369             }
 370             intf_ErrMsg( "Unable to allocate off screen image in AGP, trying next best System" );
 371             p_vout->p_sys->gwLocOffscreen = kInSystem;
 372         case kInSystem:
 373         default:
 374             if ( noErr == NewGWorld( &p_vout->p_sys->p_gw[index], p_vout->i_screen_depth,
 375                 GetPortBounds( GetWindowPort( p_vout->p_sys->p_window ), &bounds ), NULL,
 376                 hgdWindow, noNewDevice | keepLocal) )
 377             {
 378                 intf_ErrMsg( "Allocate off screen image in System" );
 379                 break;
 380             }
 381             intf_ErrMsg( "Unable to allocate off screen image in System, no options left - failing" );
 382             p_vout->p_sys->gwLocOffscreen = kNoWhere;
 383             return( 1 ); // nothing was allocated
 384     }
 385     return( 0 );
 386 }
 387
 388 /*****************************************************************************
 389  * vout_Init: initialize video thread output method
 390  *****************************************************************************/
 391 static int vout_Init( vout_thread_t *p_vout )
 392 {
 393     //intf_ErrMsg( "vout_Init()" );
 394     return( 0 );
 395 }
 396
 397 /*****************************************************************************
 398  * vout_End: terminate video thread output method
 399  *****************************************************************************/
 400 static void vout_End( vout_thread_t *p_vout )
 401 {
 402     //intf_ErrMsg( "vout_End()" );
 403     ;
 404 }
 405
 406 /*****************************************************************************
 407  * vout_Destroy: destroy video thread output method
 408  *****************************************************************************/
 409 static void vout_Destroy( vout_thread_t *p_vout )
 410 {
 411     //intf_ErrMsg( "vout_Destroy()" );
 412
 413 //FIXME Big Lock around Gworlds
 414     PixMapHandle hPixmap0, hPixmap1;
 415     hPixmap0 = GetGWorldPixMap( p_vout->p_sys->p_gw[0] );
 416     hPixmap1 = GetGWorldPixMap( p_vout->p_sys->p_gw[1] );
 417     UnlockPixels(hPixmap0);
 418     UnlockPixels(hPixmap1);
 419
 420     if ( p_vout->p_sys->p_gw[0] )
 421     {
 422         DisposeGWorld( p_vout->p_sys->p_gw[0] );
 423     }
 424     if ( p_vout->p_sys->p_gw[1] )
 425     {
 426         DisposeGWorld( p_vout->p_sys->p_gw[1] );
 427     }
 428     if ( p_vout->p_sys->p_window )
 429     {
 430         DisposeWindow( p_vout->p_sys->p_window );
 431     }
 432
 433     free( p_vout->p_sys );
 434 }
 435
 436 /*****************************************************************************
 437  * vout_Manage: handle events
 438  *****************************************************************************
 439  * This function should be called regularly by video output thread. It manages
 440  * console events. It returns a non null value on error.
 441  *****************************************************************************/
 442 static int vout_Manage( vout_thread_t *p_vout )
 443 {
 444 //    intf_ErrMsg( "vout_Manage()" );
 445     return( 0 );
 446 }
 447
 448 /*****************************************************************************
 449  * vout_Display: displays previously rendered output
 450  *****************************************************************************
 451  * This function send the currently rendered image to image, waits until
 452  * it is displayed and switch the two rendering buffers, preparing next frame.
 453  *****************************************************************************/
 454 static void vout_Display( vout_thread_t *p_vout )
 455 {
 456 //    intf_ErrMsg( "vout_Display()" );
 457
 458 //we should not be called if we set the status to paused or stopped via the interface
 459 //    if ( p_vout->p_sys->playback_status != PAUSED &&  p_vout->p_sys->playback_status != STOPPED )
 460         BlitToWindow ( p_vout, p_vout->i_buffer_index );
 461 }
 462
 463
 464 /*****************************************************************************
 465  * flushQD: flushes buffered window area
 466  *****************************************************************************/
 467 void flushQD( vout_thread_t *p_vout )
 468 {
 469     CGrafPtr thePort;
 470
 471     //intf_ErrMsg( "flushQD()" );
 472
 473     thePort = GetWindowPort( p_vout->p_sys->p_window );
 474
 475     /* flush the entire port */
 476     if (QDIsPortBuffered(thePort))
 477         QDFlushPortBuffer(thePort, NULL);
 478
 479 #if 0
 480     /* flush part of the port */
 481     if (QDIsPortBuffered(thePort)) {
 482         RgnHandle theRgn;
 483         theRgn = NewRgn();
 484             /* local port coordinates */
 485         SetRectRgn(theRgn, 10, 10, 100, 30);
 486         QDFlushPortBuffer(thePort, theRgn);
 487         DisposeRgn(theRgn);
 488     }
 489 #endif
 490
 491 }
 492
 493 /*****************************************************************************
 494  * BlitToWindow: checks offscreen and blits it to the front
 495  *****************************************************************************/
 496
 497 void BlitToWindow( vout_thread_t *p_vout, short index )
 498 {
 499     Rect rectDest, rectSource;
 500     GrafPtr pCGrafSave, windowPort = GetWindowPort( p_vout->p_sys->p_window );
 501
 502     //intf_ErrMsg( "BlitToWindow() for %d", index );
 503
 504     GetPortBounds( p_vout->p_sys->p_gw[index], &rectSource );
 505     GetPortBounds( windowPort, &rectDest );
 506
 507     GetPort ( &pCGrafSave );
 508     SetPortWindowPort( p_vout->p_sys->p_window );
 509 //FIXME have global lock - kinda bad but oh well
 510 //    if ( LockPixels( GetGWorldPixMap( p_vout->p_sys->p_gw[index] ) ) )
 511 //    {
 512
 513 //LockPortBits(GetWindowPort( p_vout->p_sys->p_window ));
 514 //NoPurgePixels( GetGWorldPixMap( p_vout->p_sys->p_gw[index] ) );
 515
 516         CopyBits( GetPortBitMapForCopyBits( p_vout->p_sys->p_gw[index] ),
 517                     GetPortBitMapForCopyBits( GetWindowPort( p_vout->p_sys->p_window ) ),
 518                     &rectSource, &rectDest, srcCopy, NULL);
 519
 520 //UnlockPortBits(GetWindowPort( p_vout->p_sys->p_window ));
 521 //AllowPurgePixels( GetGWorldPixMap( p_vout->p_sys->p_gw[index] ) );
 522
 523 //        UnlockPixels( GetGWorldPixMap( p_vout->p_sys->p_gw[index] ) );
 524         //flushQD( p_vout );
 525 //    }
 526     SetPort ( pCGrafSave );
 527 }
 528
 529
 530 /*****************************************************************************
 531  * GetWindowDevice: returns GDHandle that window resides on (most of it anyway)
 532  *****************************************************************************/
 533 GDHandle GetWindowDevice( vout_thread_t *p_vout )
 534 {
 535     GrafPtr pgpSave;
 536     Rect rectWind, rectSect;
 537     long greatestArea, sectArea;
 538     GDHandle hgdNthDevice, hgdZoomOnThisDevice = NULL;
 539
 540     //intf_ErrMsg( "GetWindowDevice()" );
 541
 542     GetPort( &pgpSave );
 543     SetPortWindowPort( p_vout->p_sys->p_window );
 544     GetPortBounds( GetWindowPort( p_vout->p_sys->p_window ), &rectWind );
 545     LocalToGlobal( ( Point* ) &rectWind.top );
 546     LocalToGlobal( ( Point* ) &rectWind.bottom );
 547     hgdNthDevice = GetDeviceList();
 548     greatestArea = 0;
 549     // check window against all gdRects in gDevice list and remember
 550     //  which gdRect contains largest area of window}
 551     while ( hgdNthDevice )
 552     {
 553         if ( TestDeviceAttribute( hgdNthDevice, screenDevice ) )
 554         {
 555             if ( TestDeviceAttribute( hgdNthDevice, screenActive ) )
 556             {
 557                 // The SectRect routine calculates the intersection
 558                 //  of the window rectangle and this gDevice
 559                 //  rectangle and returns TRUE if the rectangles intersect,
 560                 //  FALSE if they don't.
 561                 SectRect( &rectWind, &( **hgdNthDevice ).gdRect, &rectSect );
 562                 // determine which screen holds greatest window area
 563                 //  first, calculate area of rectangle on current device
 564                 sectArea = ( long )( rectSect.right - rectSect.left ) * ( rectSect.bottom - rectSect.top );
 565                 if ( sectArea > greatestArea )
 566                 {
 567                     greatestArea = sectArea;    // set greatest area so far
 568                     hgdZoomOnThisDevice = hgdNthDevice; // set zoom device
 569                 }
 570                 hgdNthDevice = GetNextDevice( hgdNthDevice );
 571             }
 572         }
 573     }   // of WHILE
 574     SetPort( pgpSave );
 575     return hgdZoomOnThisDevice;
 576 }
 577
 578 /*****************************************************************************
 579  * FillOffScreen: fills offscreen buffer with random bright color
 580  *****************************************************************************/
 581
 582 void FillOffscreen( vout_thread_t *p_vout, short index )
 583 {
 584     static RGBColor rgbColorOld;
 585     GDHandle hGDSave;
 586     CGrafPtr pCGrafSave;
 587     Rect rectSource;
 588     RGBColor rgbColor;
 589
 590     //intf_ErrMsg( "FillOffscreen" );
 591
 592     GetPortBounds( p_vout->p_sys->p_gw[index], &rectSource );
 593
 594     do
 595         rgbColor.red = ( Random () + 32767) / 2 + 32767;
 596     while ( abs ( rgbColor.red - rgbColorOld.red ) <  3000 );
 597     do
 598         rgbColor.green = (Random () + 32767) / 2 + 32767;
 599     while ( abs ( rgbColor.green - rgbColorOld.green ) <  3000);
 600     do
 601         rgbColor.blue = (Random () + 32767) / 2 + 32767;
 602     while ( abs ( rgbColor.blue - rgbColorOld.blue ) <  3000);
 603
 604     rgbColorOld = rgbColor;
 605
 606     GetGWorld( &pCGrafSave, &hGDSave );
 607     SetGWorld( p_vout->p_sys->p_gw[index], NULL );
 608 //FIXME have global lock - kinda bad but oh well
 609 //    if ( LockPixels( GetGWorldPixMap( p_vout->p_sys->p_gw[index] ) ) )
 610 //    {
 611         // draw some background
 612         EraseRect( &rectSource );
 613         RGBForeColor( &rgbColor );
 614         PaintRect( &rectSource );
 615 //        UnlockPixels( GetGWorldPixMap( p_vout->p_sys->p_gw[index] ) );
 616 //    }
 617     SetGWorld( pCGrafSave, hGDSave );
 618 }