windows/painting.c

   1 /*
   2  * Window painting functions
   3  *
   4  * Copyright 1993, 1994, 1995 Alexandre Julliard
   5  *                       1999 Alex Korobka
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <string.h>
  23 #include "windef.h"
  24 #include "wingdi.h"
  25 #include "wine/winuser16.h"
  26 #include "wownt32.h"
  27 #include "wine/unicode.h"
  28 #include "wine/server.h"
  29 #include "gdi.h"
  30 #include "user.h"
  31 #include "win.h"
  32 #include "message.h"
  33 #include "dce.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(win);
  37 WINE_DECLARE_DEBUG_CHANNEL(nonclient);
  38
  39 /* client rect in window coordinates */
  40
  41 #define GETCLIENTRECTW( wnd, r )        (r).left = (wnd)->rectClient.left - (wnd)->rectWindow.left; \
  42                                         (r).top = (wnd)->rectClient.top - (wnd)->rectWindow.top; \
  43                                         (r).right = (wnd)->rectClient.right - (wnd)->rectWindow.left; \
  44                                         (r).bottom = (wnd)->rectClient.bottom - (wnd)->rectWindow.top
  45
  46   /* PAINT_RedrawWindow() control flags */
  47 #define RDW_EX_DELAY_NCPAINT    0x0020
  48
  49   /* WIN_UpdateNCRgn() flags */
  50 #define UNC_CHECK               0x0001
  51 #define UNC_ENTIRE              0x0002
  52 #define UNC_REGION              0x0004
  53 #define UNC_UPDATE              0x0008
  54 #define UNC_DELAY_NCPAINT       0x0010
  55 #define UNC_IN_BEGINPAINT       0x0020
  56
  57   /* Last COLOR id */
  58 #define COLOR_MAX   COLOR_GRADIENTINACTIVECAPTION
  59
  60 HPALETTE (WINAPI *pfnGDISelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = NULL;
  61 UINT (WINAPI *pfnGDIRealizePalette)(HDC hdc) = NULL;
  62
  63
  64 /***********************************************************************
  65  *           add_paint_count
  66  *
  67  * Add an increment (normally 1 or -1) to the current paint count of a window.
  68  */
  69 static void add_paint_count( HWND hwnd, int incr )
  70 {
  71     SERVER_START_REQ( inc_window_paint_count )
  72     {
  73         req->handle = hwnd;
  74         req->incr   = incr;
  75         wine_server_call( req );
  76     }
  77     SERVER_END_REQ;
  78 }
  79
  80
  81 /***********************************************************************
  82  *           crop_rgn
  83  *
  84  * hSrc:        Region to crop.
  85  * lpRect:      Clipping rectangle.
  86  *
  87  * hDst: Region to hold the result (a new region is created if it's 0).
  88  *       Allowed to be the same region as hSrc in which case everything
  89  *       will be done in place, with no memory reallocations.
  90  *
  91  * Returns: hDst if success, 0 otherwise.
  92  */
  93 static HRGN crop_rgn( HRGN hDst, HRGN hSrc, const RECT *rect )
  94 {
  95     HRGN h = CreateRectRgnIndirect( rect );
  96     if (hDst == 0) hDst = h;
  97     CombineRgn( hDst, hSrc, h, RGN_AND );
  98     if (hDst != h) DeleteObject( h );
  99     return hDst;
 100 }
 101
 102
 103 /***********************************************************************
 104  *           WIN_HaveToDelayNCPAINT
 105  *
 106  * Currently, in the Wine painting mechanism, the WM_NCPAINT message
 107  * is generated as soon as a region intersecting the non-client area
 108  * of a window is invalidated.
 109  *
 110  * This technique will work fine for all windows whose parents
 111  * have the WS_CLIPCHILDREN style. When the parents have that style,
 112  * they are not going to override the contents of their children.
 113  * However, when the parent doesn't have that style, Windows relies
 114  * on a "painter's algorithm" to display the contents of the windows.
 115  * That is, windows are painted from back to front. This includes the
 116  * non-client area.
 117  *
 118  * This method looks at the current state of a window to determine
 119  * if the sending of the WM_NCPAINT message should be delayed until
 120  * the BeginPaint call.
 121  *
 122  * PARAMS:
 123  *   wndPtr   - A Locked window pointer to the window we're
 124  *              examining.
 125  *   uncFlags - This is the flag passed to the WIN_UpdateNCRgn
 126  *              function. This is a shortcut for the cases when
 127  *              we already know when to avoid scanning all the
 128  *              parents of a window. If you already know that this
 129  *              window's NCPAINT should be delayed, set the
 130  *              UNC_DELAY_NCPAINT flag for this parameter.
 131  *
 132  *              This shortcut behavior is implemented in the
 133  *              RDW_Paint() method.
 134  *
 135  */
 136 static BOOL WIN_HaveToDelayNCPAINT( HWND hwnd, UINT uncFlags)
 137 {
 138   /*
 139    * Test the shortcut first. (duh)
 140    */
 141   if (uncFlags & UNC_DELAY_NCPAINT)
 142     return TRUE;
 143
 144   /*
 145    * The UNC_IN_BEGINPAINT flag is set in the BeginPaint
 146    * method only. This is another shortcut to avoid going
 147    * up the parent's chain of the window to finally
 148    * figure-out that none of them has an invalid region.
 149    */
 150   if (uncFlags & UNC_IN_BEGINPAINT)
 151     return FALSE;
 152
 153   /*
 154    * Scan all the parents of this window to find a window
 155    * that doesn't have the WS_CLIPCHILDREN style and that
 156    * has an invalid region.
 157    */
 158   while ((hwnd = GetAncestor( hwnd, GA_PARENT )))
 159   {
 160       WND* parentWnd = WIN_FindWndPtr( hwnd );
 161       if (parentWnd && !(parentWnd->dwStyle & WS_CLIPCHILDREN) && parentWnd->hrgnUpdate)
 162       {
 163           WIN_ReleaseWndPtr( parentWnd );
 164           return TRUE;
 165       }
 166       WIN_ReleaseWndPtr( parentWnd );
 167   }
 168   return FALSE;
 169 }
 170
 171 /***********************************************************************
 172  *           WIN_UpdateNCRgn
 173  *
 174  *  Things to do:
 175  *      Send WM_NCPAINT if required (when nonclient is invalid or UNC_ENTIRE flag is set)
 176  *      Crop hrgnUpdate to a client rect, especially if it 1.
 177  *      If UNC_REGION is set return update region for the client rect.
 178  *
 179  *  NOTE: UNC_REGION is mainly for the RDW_Paint() chunk that sends WM_ERASEBKGND message.
 180  *        The trick is that when the returned region handle may be different from hRgn.
 181  *        In this case the old hRgn must be considered gone. BUT, if the returned value
 182  *        is 1 then the hRgn is preserved and RDW_Paint() will have to get
 183  *        a DC without extra clipping region.
 184  */
 185 static HRGN WIN_UpdateNCRgn(WND* wnd, HRGN hRgn, UINT uncFlags )
 186 {
 187     RECT  r;
 188     HRGN  hClip = 0;
 189     HRGN  hrgnRet = 0;
 190
 191     TRACE_(nonclient)("hwnd %p [%p] hrgn %p, unc %04x, ncf %i\n",
 192                       wnd->hwndSelf, wnd->hrgnUpdate, hRgn, uncFlags, wnd->flags & WIN_NEEDS_NCPAINT);
 193
 194     /* desktop window doesn't have a nonclient area */
 195     if(wnd->hwndSelf == GetDesktopWindow())
 196     {
 197         wnd->flags &= ~WIN_NEEDS_NCPAINT;
 198         if( wnd->hrgnUpdate > (HRGN)1 )
 199         {
 200             if (!hRgn) hRgn = CreateRectRgn( 0, 0, 0, 0 );
 201             CombineRgn( hRgn, wnd->hrgnUpdate, 0, RGN_COPY );
 202             hrgnRet = hRgn;
 203         }
 204         else
 205         {
 206             hrgnRet = wnd->hrgnUpdate;
 207         }
 208         return hrgnRet;
 209     }
 210
 211     if ((wnd->hwndSelf == GetForegroundWindow()) &&
 212         !(wnd->flags & WIN_NCACTIVATED) )
 213     {
 214         wnd->flags |= WIN_NCACTIVATED;
 215         uncFlags |= UNC_ENTIRE;
 216     }
 217
 218     /*
 219      * If the window's non-client area needs to be painted,
 220      */
 221     if ( ( wnd->flags & WIN_NEEDS_NCPAINT ) &&
 222          !WIN_HaveToDelayNCPAINT(wnd->hwndSelf, uncFlags) )
 223     {
 224             RECT r2, r3;
 225
 226             wnd->flags &= ~WIN_NEEDS_NCPAINT;
 227             GETCLIENTRECTW( wnd, r );
 228
 229             TRACE_(nonclient)( "\tclient box (%ld,%ld-%ld,%ld), hrgnUpdate %p\n",
 230                                 r.left, r.top, r.right, r.bottom, wnd->hrgnUpdate );
 231             if( wnd->hrgnUpdate > (HRGN)1 )
 232             {
 233                 /* Check if update rgn overlaps with nonclient area */
 234
 235                 GetRgnBox( wnd->hrgnUpdate, &r2 );
 236                 UnionRect( &r3, &r2, &r );
 237                 if( r3.left != r.left || r3.top != r.top ||
 238                     r3.right != r.right || r3.bottom != r.bottom ) /* it does */
 239                 {
 240                     /* crop hrgnUpdate, save old one in hClip - the only
 241                      * case that places a valid region handle in hClip */
 242
 243                     hClip = wnd->hrgnUpdate;
 244                     wnd->hrgnUpdate = crop_rgn( hRgn, hClip, &r );
 245                     if( uncFlags & UNC_REGION ) hrgnRet = hClip;
 246                 }
 247
 248                 if( uncFlags & UNC_CHECK )
 249                 {
 250                     GetRgnBox( wnd->hrgnUpdate, &r3 );
 251                     if( IsRectEmpty( &r3 ) )
 252                     {
 253                         /* delete the update region since all invalid
 254                          * parts were in the nonclient area */
 255
 256                         DeleteObject( wnd->hrgnUpdate );
 257                         wnd->hrgnUpdate = 0;
 258                         if(!(wnd->flags & WIN_INTERNAL_PAINT))
 259                             add_paint_count( wnd->hwndSelf, -1 );
 260
 261                         wnd->flags &= ~WIN_NEEDS_ERASEBKGND;
 262                     }
 263                 }
 264
 265                 if(!hClip && wnd->hrgnUpdate ) goto copyrgn;
 266             }
 267             else
 268             if( wnd->hrgnUpdate == (HRGN)1 )/* entire window */
 269             {
 270                 if( uncFlags & UNC_UPDATE ) wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 271                 if( uncFlags & UNC_REGION ) hrgnRet = (HRGN)1;
 272                 uncFlags |= UNC_ENTIRE;
 273             }
 274     }
 275     else /* no WM_NCPAINT unless forced */
 276     {
 277         if( wnd->hrgnUpdate >  (HRGN)1 )
 278         {
 279 copyrgn:
 280             if( uncFlags & UNC_REGION )
 281             {
 282                 if (!hRgn) hRgn = CreateRectRgn( 0, 0, 0, 0 );
 283                 CombineRgn( hRgn, wnd->hrgnUpdate, 0, RGN_COPY );
 284                 hrgnRet = hRgn;
 285             }
 286         }
 287         else
 288         if( wnd->hrgnUpdate == (HRGN)1 && (uncFlags & UNC_UPDATE) )
 289         {
 290             GETCLIENTRECTW( wnd, r );
 291             wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 292             if( uncFlags & UNC_REGION ) hrgnRet = (HRGN)1;
 293         }
 294     }
 295
 296     if(!hClip && (uncFlags & UNC_ENTIRE) )
 297     {
 298         /* still don't do anything if there is no nonclient area */
 299         hClip = (HRGN)(memcmp( &wnd->rectWindow, &wnd->rectClient, sizeof(RECT) ) != 0);
 300     }
 301
 302     if( hClip ) /* NOTE: WM_NCPAINT allows wParam to be 1 */
 303     {
 304         if ( hClip == hrgnRet && hrgnRet > (HRGN)1 ) {
 305             hClip = CreateRectRgn( 0, 0, 0, 0 );
 306             CombineRgn( hClip, hrgnRet, 0, RGN_COPY );
 307         }
 308
 309         SendMessageA( wnd->hwndSelf, WM_NCPAINT, (WPARAM)hClip, 0L );
 310         if( (hClip > (HRGN)1) && (hClip != hRgn) && (hClip != hrgnRet) )
 311             DeleteObject( hClip );
 312         /*
 313          * Since all Window locks are suspended while processing the WM_NCPAINT
 314          * we want to make sure the window still exists before continuing.
 315          */
 316         if (!IsWindow(wnd->hwndSelf))
 317         {
 318           DeleteObject(hrgnRet);
 319           hrgnRet=0;
 320         }
 321     }
 322
 323     TRACE_(nonclient)("returning %p (hClip = %p, hrgnUpdate = %p)\n", hrgnRet, hClip, wnd->hrgnUpdate );
 324
 325     return hrgnRet;
 326 }
 327
 328
 329 /***********************************************************************
 330  *              RDW_ValidateParent [RDW_UpdateRgns() helper]
 331  *
 332  *  Validate the portions of parents that are covered by a validated child
 333  *  wndPtr = child
 334  */
 335 static void RDW_ValidateParent(WND *wndChild)
 336 {
 337     HWND parent;
 338     HRGN hrg;
 339
 340     if (wndChild->hrgnUpdate == (HRGN)1 ) {
 341         RECT r;
 342         r.left = 0;
 343         r.top = 0;
 344         r.right = wndChild->rectWindow.right - wndChild->rectWindow.left;
 345         r.bottom = wndChild->rectWindow.bottom - wndChild->rectWindow.top;
 346         hrg = CreateRectRgnIndirect( &r );
 347     } else
 348         hrg = wndChild->hrgnUpdate;
 349
 350     parent = GetAncestor( wndChild->hwndSelf, GA_PARENT );
 351     while (parent && parent != GetDesktopWindow())
 352     {
 353         WND *wndParent = WIN_FindWndPtr( parent );
 354         if (wndParent && !(wndParent->dwStyle & WS_CLIPCHILDREN))
 355         {
 356             if (wndParent->hrgnUpdate != 0)
 357             {
 358                 POINT ptOffset;
 359                 RECT rect, rectParent;
 360                 if( wndParent->hrgnUpdate == (HRGN)1 )
 361                 {
 362                    RECT r;
 363
 364                    r.left = 0;
 365                    r.top = 0;
 366                    r.right = wndParent->rectWindow.right - wndParent->rectWindow.left;
 367                    r.bottom = wndParent->rectWindow.bottom - wndParent->rectWindow.top;
 368
 369                    wndParent->hrgnUpdate = CreateRectRgnIndirect( &r );
 370                 }
 371                 /* we must offset the child region by the offset of the child rect in the parent */
 372                 GetWindowRect(wndParent->hwndSelf, &rectParent);
 373                 GetWindowRect(wndChild->hwndSelf, &rect);
 374                 ptOffset.x = rect.left - rectParent.left;
 375                 ptOffset.y = rect.top - rectParent.top;
 376                 OffsetRgn( hrg, ptOffset.x, ptOffset.y );
 377                 CombineRgn( wndParent->hrgnUpdate, wndParent->hrgnUpdate, hrg, RGN_DIFF );
 378                 OffsetRgn( hrg, -ptOffset.x, -ptOffset.y );
 379             }
 380         }
 381         WIN_ReleaseWndPtr( wndParent );
 382         parent = GetAncestor( parent, GA_PARENT );
 383     }
 384     if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
 385 }
 386
 387 /***********************************************************************
 388  *              RDW_UpdateRgns [RedrawWindow() helper]
 389  *
 390  *  Walks the window tree and adds/removes parts of the hRgn to/from update
 391  *  regions of windows that overlap it. Also, manages internal paint flags.
 392  *
 393  *  NOTE: Walks the window tree so the caller must lock it.
 394  *        MUST preserve hRgn (can modify but then has to restore).
 395  */
 396 static void RDW_UpdateRgns( WND* wndPtr, HRGN hRgn, UINT flags, BOOL firstRecursLevel )
 397 {
 398     /*
 399      * Called only when one of the following is set:
 400      * (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT)
 401      */
 402
 403     BOOL bHadOne =  wndPtr->hrgnUpdate && hRgn;
 404     BOOL bChildren =  (!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
 405                        ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) );
 406     RECT r;
 407
 408     r.left = 0;
 409     r.top = 0;
 410     r.right = wndPtr->rectWindow.right - wndPtr->rectWindow.left;
 411     r.bottom = wndPtr->rectWindow.bottom - wndPtr->rectWindow.top;
 412
 413     TRACE("\thwnd %p [%p] -> hrgn [%p], flags [%04x]\n", wndPtr->hwndSelf, wndPtr->hrgnUpdate, hRgn, flags );
 414
 415     if( flags & RDW_INVALIDATE )
 416     {
 417         if( hRgn > (HRGN)1 )
 418         {
 419             switch ((UINT)wndPtr->hrgnUpdate)
 420             {
 421                 default:
 422                         CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_OR );
 423                         /* fall through */
 424                 case 0:
 425                         wndPtr->hrgnUpdate = crop_rgn( wndPtr->hrgnUpdate,
 426                                                        wndPtr->hrgnUpdate ? wndPtr->hrgnUpdate : hRgn,
 427                                                        &r );
 428                         if( !bHadOne )
 429                         {
 430                             GetRgnBox( wndPtr->hrgnUpdate, &r );
 431                             if( IsRectEmpty( &r ) )
 432                             {
 433                                 DeleteObject( wndPtr->hrgnUpdate );
 434                                 wndPtr->hrgnUpdate = 0;
 435                                 goto end;
 436                             }
 437                         }
 438                         break;
 439                 case 1: /* already an entire window */
 440                         break;
 441             }
 442         }
 443         else if( hRgn == (HRGN)1 )
 444         {
 445             if( wndPtr->hrgnUpdate > (HRGN)1 )
 446                 DeleteObject( wndPtr->hrgnUpdate );
 447             wndPtr->hrgnUpdate = (HRGN)1;
 448         }
 449         else
 450             hRgn = wndPtr->hrgnUpdate;  /* this is a trick that depends on code in PAINT_RedrawWindow() */
 451
 452         if( !bHadOne && !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 453             add_paint_count( wndPtr->hwndSelf, 1 );
 454
 455         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 456         if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 457         flags    |= RDW_FRAME;
 458     }
 459     else if( flags & RDW_VALIDATE )
 460     {
 461         if( wndPtr->hrgnUpdate )
 462         {
 463             if( hRgn > (HRGN)1 )
 464             {
 465                 if( wndPtr->hrgnUpdate == (HRGN)1 )
 466                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r );
 467
 468                 if( CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_DIFF )
 469                     == NULLREGION )
 470                 {
 471                     DeleteObject( wndPtr->hrgnUpdate );
 472                     wndPtr->hrgnUpdate = 0;
 473                 }
 474             }
 475             else /* validate everything */
 476             {
 477                 if( wndPtr->hrgnUpdate > (HRGN)1 ) DeleteObject( wndPtr->hrgnUpdate );
 478                 wndPtr->hrgnUpdate = 0;
 479             }
 480
 481             if( !wndPtr->hrgnUpdate )
 482             {
 483                 wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 484                 if( !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 485                     add_paint_count( wndPtr->hwndSelf, -1 );
 486             }
 487         }
 488
 489         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 490         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 491
 492     }
 493
 494     if ((firstRecursLevel) && (wndPtr->hrgnUpdate != 0) && (flags & RDW_UPDATENOW))
 495         RDW_ValidateParent(wndPtr); /* validate parent covered by region */
 496
 497     /* in/validate child windows that intersect with the region if it
 498      * is a valid handle. */
 499
 500     if( flags & (RDW_INVALIDATE | RDW_VALIDATE) )
 501     {
 502         HWND *list;
 503         if( hRgn > (HRGN)1 && bChildren && (list = WIN_ListChildren( wndPtr->hwndSelf )))
 504         {
 505             POINT ptTotal, prevOrigin = {0,0};
 506             POINT ptClient;
 507             INT i;
 508
 509             ptClient.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 510             ptClient.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 511
 512             for(i = ptTotal.x = ptTotal.y = 0; list[i]; i++)
 513             {
 514                 WND *wnd = WIN_FindWndPtr( list[i] );
 515                 if (!wnd) continue;
 516                 if( wnd->dwStyle & WS_VISIBLE )
 517                 {
 518                     POINT ptOffset;
 519
 520                     r.left = wnd->rectWindow.left + ptClient.x;
 521                     r.right = wnd->rectWindow.right + ptClient.x;
 522                     r.top = wnd->rectWindow.top + ptClient.y;
 523                     r.bottom = wnd->rectWindow.bottom + ptClient.y;
 524
 525                     ptOffset.x = r.left - prevOrigin.x;
 526                     ptOffset.y = r.top - prevOrigin.y;
 527                     OffsetRect( &r, -ptTotal.x, -ptTotal.y );
 528
 529                     if( RectInRegion( hRgn, &r ) )
 530                     {
 531                         OffsetRgn( hRgn, -ptOffset.x, -ptOffset.y );
 532                         RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 533                         prevOrigin.x = r.left + ptTotal.x;
 534                         prevOrigin.y = r.top + ptTotal.y;
 535                         ptTotal.x += ptOffset.x;
 536                         ptTotal.y += ptOffset.y;
 537                     }
 538                 }
 539                 WIN_ReleaseWndPtr( wnd );
 540             }
 541             HeapFree( GetProcessHeap(), 0, list );
 542             OffsetRgn( hRgn, ptTotal.x, ptTotal.y );
 543             bChildren = 0;
 544         }
 545     }
 546
 547     /* handle hRgn == 1 (alias for entire window) and/or internal paint recursion */
 548
 549     if( bChildren )
 550     {
 551         HWND *list;
 552         if ((list = WIN_ListChildren( wndPtr->hwndSelf )))
 553         {
 554             INT i;
 555             for (i = 0; list[i]; i++)
 556             {
 557                 WND *wnd = WIN_FindWndPtr( list[i] );
 558                 if (!wnd) continue;
 559                 if( wnd->dwStyle & WS_VISIBLE )
 560                     RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 561                 WIN_ReleaseWndPtr( wnd );
 562             }
 563             HeapFree( GetProcessHeap(), 0, list );
 564         }
 565     }
 566
 567 end:
 568
 569     /* Set/clear internal paint flag */
 570
 571     if (flags & RDW_INTERNALPAINT)
 572     {
 573         if ( !wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 574             add_paint_count( wndPtr->hwndSelf, 1 );
 575         wndPtr->flags |= WIN_INTERNAL_PAINT;
 576     }
 577     else if (flags & RDW_NOINTERNALPAINT)
 578     {
 579         if ( !wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
 580             add_paint_count( wndPtr->hwndSelf, -1 );
 581         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 582     }
 583 }
 584
 585 /***********************************************************************
 586  *           RDW_Paint [RedrawWindow() helper]
 587  *
 588  * Walks the window tree and paints/erases windows that have
 589  * nonzero update regions according to redraw flags. hrgn is a scratch
 590  * region passed down during recursion. Must not be 1.
 591  *
 592  */
 593 static HRGN RDW_Paint( WND* wndPtr, HRGN hrgn, UINT flags, UINT ex )
 594 {
 595 /* NOTE: wndPtr is locked by caller.
 596  *
 597  * FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask
 598  * SendMessage() calls. This is a comment inside DefWindowProc() source
 599  * from 16-bit SDK:
 600  *
 601  *   This message avoids lots of inter-app message traffic
 602  *   by switching to the other task and continuing the
 603  *   recursion there.
 604  *
 605  * wParam         = flags
 606  * LOWORD(lParam) = hrgnClip
 607  * HIWORD(lParam) = hwndSkip  (not used; always NULL)
 608  *
 609  */
 610     HDC  hDC;
 611     HWND hWnd = wndPtr->hwndSelf;
 612     BOOL bIcon = ((wndPtr->dwStyle & WS_MINIMIZE) && GetClassLongA(hWnd, GCL_HICON));
 613
 614       /* Erase/update the window itself ... */
 615
 616     TRACE("\thwnd %p [%p] -> hrgn [%p], flags [%04x]\n", hWnd, wndPtr->hrgnUpdate, hrgn, flags );
 617
 618     /*
 619      * Check if this window should delay it's processing of WM_NCPAINT.
 620      * See WIN_HaveToDelayNCPAINT for a description of the mechanism
 621      */
 622     if ((ex & RDW_EX_DELAY_NCPAINT) || WIN_HaveToDelayNCPAINT(wndPtr->hwndSelf, 0) )
 623         ex |= RDW_EX_DELAY_NCPAINT;
 624
 625     if (flags & RDW_UPDATENOW)
 626     {
 627         if (wndPtr->hrgnUpdate) /* wm_painticon wparam is 1 */
 628             SendMessageW( hWnd, (bIcon) ? WM_PAINTICON : WM_PAINT, bIcon, 0 );
 629     }
 630     else if (flags & RDW_ERASENOW)
 631     {
 632         UINT dcx = DCX_INTERSECTRGN | DCX_USESTYLE | DCX_KEEPCLIPRGN | DCX_WINDOWPAINT | DCX_CACHE;
 633         HRGN hrgnRet;
 634
 635         hrgnRet = WIN_UpdateNCRgn(wndPtr,
 636                                   hrgn,
 637                                   UNC_REGION | UNC_CHECK |
 638                                   ((ex & RDW_EX_DELAY_NCPAINT) ? UNC_DELAY_NCPAINT : 0) );
 639
 640         if( hrgnRet )
 641         {
 642             if( hrgnRet > (HRGN)1 ) hrgn = hrgnRet; else hrgnRet = 0; /* entire client */
 643             if( wndPtr->flags & WIN_NEEDS_ERASEBKGND )
 644             {
 645                 if( bIcon ) dcx |= DCX_WINDOW;
 646                 else
 647                 if( hrgnRet )
 648                     OffsetRgn( hrgnRet, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 649                                         wndPtr->rectWindow.top  - wndPtr->rectClient.top);
 650                 else
 651                     dcx &= ~DCX_INTERSECTRGN;
 652                 if (( hDC = GetDCEx( hWnd, hrgnRet, dcx )) )
 653                 {
 654                     if (SendMessageW( hWnd, (bIcon) ? WM_ICONERASEBKGND : WM_ERASEBKGND,
 655                                       (WPARAM)hDC, 0 ))
 656                     wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 657                     ReleaseDC( hWnd, hDC );
 658                 }
 659             }
 660         }
 661     }
 662
 663     if( !IsWindow(hWnd) ) return hrgn;
 664
 665       /* ... and its child windows */
 666
 667     if(!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
 668        ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) )
 669     {
 670         HWND *list, *phwnd;
 671
 672         if( (list = WIN_ListChildren( wndPtr->hwndSelf )) )
 673         {
 674             for (phwnd = list; *phwnd; phwnd++)
 675             {
 676                 if (!(wndPtr = WIN_FindWndPtr( *phwnd ))) continue;
 677                 if ( (wndPtr->dwStyle & WS_VISIBLE) &&
 678                      (wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT)) )
 679                     hrgn = RDW_Paint( wndPtr, hrgn, flags, ex );
 680                 WIN_ReleaseWndPtr(wndPtr);
 681             }
 682             HeapFree( GetProcessHeap(), 0, list );
 683         }
 684     }
 685
 686     return hrgn;
 687 }
 688
 689
 690 /***********************************************************************
 691  *              RedrawWindow (USER32.@)
 692  */
 693 BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rectUpdate,
 694                               HRGN hrgnUpdate, UINT flags )
 695 {
 696     HRGN hRgn = 0;
 697     RECT r, r2;
 698     POINT pt;
 699     WND* wndPtr;
 700
 701     if (!hwnd) hwnd = GetDesktopWindow();
 702
 703     /* check if the window or its parents are visible/not minimized */
 704
 705     if (!WIN_IsWindowDrawable( hwnd, !(flags & RDW_FRAME) )) return TRUE;
 706
 707     /* process pending events and messages before painting */
 708     if (flags & RDW_UPDATENOW)
 709         MsgWaitForMultipleObjects( 0, NULL, FALSE, 0, QS_ALLINPUT );
 710
 711     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 712     if (TRACE_ON(win))
 713     {
 714         if( hrgnUpdate )
 715         {
 716             GetRgnBox( hrgnUpdate, &r );
 717             TRACE( "%p (%p) NULL %p box (%ld,%ld-%ld,%ld) flags=%04x\n",
 718                   hwnd, wndPtr->hrgnUpdate, hrgnUpdate, r.left, r.top, r.right, r.bottom, flags );
 719         }
 720         else
 721         {
 722             if( rectUpdate )
 723                 r = *rectUpdate;
 724             else
 725                 SetRectEmpty( &r );
 726             TRACE( "%p (%p) %s %ld,%ld-%ld,%ld %p flags=%04x\n",
 727                    hwnd, wndPtr->hrgnUpdate, rectUpdate ? "rect" : "NULL", r.left,
 728                    r.top, r.right, r.bottom, hrgnUpdate, flags );
 729         }
 730     }
 731
 732     /* prepare an update region in window coordinates */
 733
 734     if (((flags & (RDW_INVALIDATE|RDW_FRAME)) == (RDW_INVALIDATE|RDW_FRAME)) ||
 735         ((flags & (RDW_VALIDATE|RDW_NOFRAME)) == (RDW_VALIDATE|RDW_NOFRAME)))
 736         r = wndPtr->rectWindow;
 737     else
 738         r = wndPtr->rectClient;
 739
 740     pt.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 741     pt.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 742     OffsetRect( &r, -wndPtr->rectClient.left, -wndPtr->rectClient.top );
 743
 744     if (flags & RDW_INVALIDATE)  /* ------------------------- Invalidate */
 745     {
 746         /* If the window doesn't have hrgnUpdate we leave hRgn zero
 747          * and put a new region straight into wndPtr->hrgnUpdate
 748          * so that RDW_UpdateRgns() won't have to do any extra work.
 749          */
 750
 751         if( hrgnUpdate )
 752         {
 753             if( wndPtr->hrgnUpdate )
 754             {
 755                 hRgn = CreateRectRgn( 0, 0, 0, 0 );
 756                 CombineRgn( hRgn, hrgnUpdate, 0, RGN_COPY );
 757                 OffsetRgn( hRgn, pt.x, pt.y );
 758             }
 759             else
 760             {
 761                 wndPtr->hrgnUpdate = crop_rgn( 0, hrgnUpdate, &r );
 762                 OffsetRgn( wndPtr->hrgnUpdate, pt.x, pt.y );
 763             }
 764         }
 765         else if( rectUpdate )
 766         {
 767             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 768             OffsetRect( &r2, pt.x, pt.y );
 769             if( wndPtr->hrgnUpdate == 0 )
 770                 wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 771             else
 772                 hRgn = CreateRectRgnIndirect( &r2 );
 773         }
 774         else /* entire window or client depending on RDW_FRAME */
 775         {
 776             if( flags & RDW_FRAME )
 777             {
 778                 if (wndPtr->hrgnUpdate) hRgn = (HRGN)1;
 779                 else wndPtr->hrgnUpdate = (HRGN)1;
 780             }
 781             else
 782             {
 783                 GETCLIENTRECTW( wndPtr, r2 );
 784                 if( wndPtr->hrgnUpdate == 0 )
 785                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 786                 else
 787                     hRgn = CreateRectRgnIndirect( &r2 );
 788             }
 789         }
 790     }
 791     else if (flags & RDW_VALIDATE)  /* ------------------------- Validate */
 792     {
 793         /* In this we cannot leave with zero hRgn */
 794         if( hrgnUpdate )
 795         {
 796             hRgn = crop_rgn( hRgn, hrgnUpdate,  &r );
 797             OffsetRgn( hRgn, pt.x, pt.y );
 798             GetRgnBox( hRgn, &r2 );
 799             if( IsRectEmpty( &r2 ) ) goto END;
 800         }
 801         else if( rectUpdate )
 802         {
 803             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 804                 OffsetRect( &r2, pt.x, pt.y );
 805             hRgn = CreateRectRgnIndirect( &r2 );
 806         }
 807         else /* entire window or client depending on RDW_NOFRAME */
 808         {
 809             if( flags & RDW_NOFRAME )
 810                 hRgn = (HRGN)1;
 811             else
 812             {
 813                 GETCLIENTRECTW( wndPtr, r2 );
 814                 hRgn = CreateRectRgnIndirect( &r2 );
 815             }
 816         }
 817     }
 818
 819     /* At this point hRgn is either an update region in window coordinates or 1 or 0 */
 820
 821     RDW_UpdateRgns( wndPtr, hRgn, flags, TRUE );
 822
 823     /* Erase/update windows, from now on hRgn is a scratch region */
 824
 825     hRgn = RDW_Paint( wndPtr, (hRgn == (HRGN)1) ? 0 : hRgn, flags, 0 );
 826
 827 END:
 828     if( hRgn > (HRGN)1 && (hRgn != hrgnUpdate) )
 829         DeleteObject(hRgn );
 830     WIN_ReleaseWndPtr(wndPtr);
 831     return TRUE;
 832 }
 833
 834
 835 /***********************************************************************
 836  *              UpdateWindow (USER32.@)
 837  */
 838 BOOL WINAPI UpdateWindow( HWND hwnd )
 839 {
 840     return RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN );
 841 }
 842
 843
 844 /***********************************************************************
 845  *              InvalidateRgn (USER32.@)
 846  */
 847 BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 848 {
 849     return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 850 }
 851
 852
 853 /***********************************************************************
 854  *              InvalidateRect (USER32.@)
 855  */
 856 BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
 857 {
 858     return RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 859 }
 860
 861
 862 /***********************************************************************
 863  *              ValidateRgn (USER32.@)
 864  */
 865 BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
 866 {
 867     return RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
 868 }
 869
 870
 871 /***********************************************************************
 872  *              ValidateRect (USER32.@)
 873  */
 874 BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect )
 875 {
 876     return RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 877 }
 878
 879
 880 /***********************************************************************
 881  *              GetUpdateRect (USER32.@)
 882  */
 883 BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
 884 {
 885     BOOL retvalue;
 886     WND * wndPtr = WIN_FindWndPtr( hwnd );
 887     if (!wndPtr) return FALSE;
 888
 889     if (rect)
 890     {
 891         if (wndPtr->hrgnUpdate > (HRGN)1)
 892         {
 893             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
 894             if (GetUpdateRgn( hwnd, hrgn, erase ) == ERROR)
 895             {
 896                 retvalue = FALSE;
 897                 goto END;
 898             }
 899             GetRgnBox( hrgn, rect );
 900             DeleteObject( hrgn );
 901             if (GetClassLongA(wndPtr->hwndSelf, GCL_STYLE) & CS_OWNDC)
 902             {
 903                 if (GetMapMode(wndPtr->dce->hDC) != MM_TEXT)
 904                 {
 905                     DPtoLP (wndPtr->dce->hDC, (LPPOINT)rect,  2);
 906                 }
 907             }
 908         }
 909         else
 910         if( wndPtr->hrgnUpdate == (HRGN)1 )
 911         {
 912             GetClientRect( hwnd, rect );
 913             if (erase) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_ERASENOW | RDW_NOCHILDREN );
 914         }
 915         else
 916             SetRectEmpty( rect );
 917     }
 918     retvalue = (wndPtr->hrgnUpdate >= (HRGN)1);
 919 END:
 920     WIN_ReleaseWndPtr(wndPtr);
 921     return retvalue;
 922 }
 923
 924
 925 /***********************************************************************
 926  *              GetUpdateRgn (USER32.@)
 927  */
 928 INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 929 {
 930     INT retval;
 931     WND * wndPtr = WIN_FindWndPtr( hwnd );
 932     if (!wndPtr) return ERROR;
 933
 934     if (wndPtr->hrgnUpdate == 0)
 935     {
 936         SetRectRgn( hrgn, 0, 0, 0, 0 );
 937         retval = NULLREGION;
 938         goto END;
 939     }
 940     else
 941     if (wndPtr->hrgnUpdate == (HRGN)1)
 942     {
 943         SetRectRgn( hrgn, 0, 0, wndPtr->rectClient.right - wndPtr->rectClient.left,
 944                                 wndPtr->rectClient.bottom - wndPtr->rectClient.top );
 945         retval = SIMPLEREGION;
 946     }
 947     else
 948     {
 949         retval = CombineRgn( hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY );
 950         OffsetRgn( hrgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 951                          wndPtr->rectWindow.top - wndPtr->rectClient.top );
 952     }
 953     if (erase) RedrawWindow( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
 954 END:
 955     WIN_ReleaseWndPtr(wndPtr);
 956     return retval;
 957 }
 958
 959
 960 /***********************************************************************
 961  *              ExcludeUpdateRgn (USER32.@)
 962  */
 963 INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd )
 964 {
 965     RECT rect;
 966     WND * wndPtr;
 967
 968     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return ERROR;
 969
 970     if (wndPtr->hrgnUpdate)
 971     {
 972         INT ret;
 973         HRGN hrgn = CreateRectRgn(wndPtr->rectWindow.left - wndPtr->rectClient.left,
 974                                       wndPtr->rectWindow.top - wndPtr->rectClient.top,
 975                                       wndPtr->rectWindow.right - wndPtr->rectClient.left,
 976                                       wndPtr->rectWindow.bottom - wndPtr->rectClient.top);
 977         if( wndPtr->hrgnUpdate > (HRGN)1 )
 978         {
 979             CombineRgn(hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY);
 980             OffsetRgn(hrgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 981                             wndPtr->rectWindow.top - wndPtr->rectClient.top );
 982         }
 983
 984         /* do ugly coordinate translations in dce.c */
 985
 986         ret = DCE_ExcludeRgn( hdc, hwnd, hrgn );
 987         DeleteObject( hrgn );
 988         WIN_ReleaseWndPtr(wndPtr);
 989         return ret;
 990     }
 991     WIN_ReleaseWndPtr(wndPtr);
 992     return GetClipBox( hdc, &rect );
 993 }
 994
 995
 996
 997 /***********************************************************************
 998  *              FillRect (USER.81)
 999  * NOTE
1000  *   The Win16 variant doesn't support special color brushes like
1001  *   the Win32 one, despite the fact that Win16, as well as Win32,
1002  *   supports special background brushes for a window class.
1003  */
1004 INT16 WINAPI FillRect16( HDC16 hdc, const RECT16 *rect, HBRUSH16 hbrush )
1005 {
1006     HBRUSH prevBrush;
1007
1008     /* coordinates are logical so we cannot fast-check 'rect',
1009      * it will be done later in the PatBlt().
1010      */
1011
1012     if (!(prevBrush = SelectObject( HDC_32(hdc), HBRUSH_32(hbrush) ))) return 0;
1013     PatBlt( HDC_32(hdc), rect->left, rect->top,
1014               rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
1015     SelectObject( HDC_32(hdc), prevBrush );
1016     return 1;
1017 }
1018
1019
1020 /***********************************************************************
1021  *              FillRect (USER32.@)
1022  */
1023 INT WINAPI FillRect( HDC hdc, const RECT *rect, HBRUSH hbrush )
1024 {
1025     HBRUSH prevBrush;
1026
1027     if (hbrush <= (HBRUSH) (COLOR_MAX + 1)) {
1028         hbrush = GetSysColorBrush( (INT) hbrush - 1 );
1029     }
1030
1031     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
1032     PatBlt( hdc, rect->left, rect->top,
1033               rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
1034     SelectObject( hdc, prevBrush );
1035     return 1;
1036 }
1037
1038
1039 /***********************************************************************
1040  *              InvertRect (USER.82)
1041  */
1042 void WINAPI InvertRect16( HDC16 hdc, const RECT16 *rect )
1043 {
1044     PatBlt( HDC_32(hdc), rect->left, rect->top,
1045               rect->right - rect->left, rect->bottom - rect->top, DSTINVERT );
1046 }
1047
1048
1049 /***********************************************************************
1050  *              InvertRect (USER32.@)
1051  */
1052 BOOL WINAPI InvertRect( HDC hdc, const RECT *rect )
1053 {
1054     return PatBlt( hdc, rect->left, rect->top,
1055                      rect->right - rect->left, rect->bottom - rect->top,
1056                      DSTINVERT );
1057 }
1058
1059
1060 /***********************************************************************
1061  *              FrameRect (USER32.@)
1062  */
1063 INT WINAPI FrameRect( HDC hdc, const RECT *rect, HBRUSH hbrush )
1064 {
1065     HBRUSH prevBrush;
1066     RECT r = *rect;
1067
1068     if ( (r.right <= r.left) || (r.bottom <= r.top) ) return 0;
1069     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
1070
1071     PatBlt( hdc, r.left, r.top, 1,
1072               r.bottom - r.top, PATCOPY );
1073     PatBlt( hdc, r.right - 1, r.top, 1,
1074               r.bottom - r.top, PATCOPY );
1075     PatBlt( hdc, r.left, r.top,
1076               r.right - r.left, 1, PATCOPY );
1077     PatBlt( hdc, r.left, r.bottom - 1,
1078               r.right - r.left, 1, PATCOPY );
1079
1080     SelectObject( hdc, prevBrush );
1081     return TRUE;
1082 }
1083
1084
1085 /***********************************************************************
1086  *              FrameRect (USER.83)
1087  */
1088 INT16 WINAPI FrameRect16( HDC16 hdc, const RECT16 *rect16, HBRUSH16 hbrush )
1089 {
1090     RECT rect;
1091     CONV_RECT16TO32( rect16, &rect );
1092     return FrameRect( HDC_32(hdc), &rect, HBRUSH_32(hbrush) );
1093 }
1094
1095
1096 /***********************************************************************
1097  *              DrawFocusRect (USER.466)
1098  */
1099 void WINAPI DrawFocusRect16( HDC16 hdc, const RECT16* rc )
1100 {
1101     RECT rect32;
1102     CONV_RECT16TO32( rc, &rect32 );
1103     DrawFocusRect( HDC_32(hdc), &rect32 );
1104 }
1105
1106
1107 /***********************************************************************
1108  *              DrawFocusRect (USER32.@)
1109  *
1110  * FIXME: PatBlt(PATINVERT) with background brush.
1111  */
1112 BOOL WINAPI DrawFocusRect( HDC hdc, const RECT* rc )
1113 {
1114     HBRUSH hOldBrush;
1115     HPEN hOldPen, hNewPen;
1116     INT oldDrawMode, oldBkMode;
1117
1118     hOldBrush = SelectObject(hdc, GetStockObject(NULL_BRUSH));
1119     hNewPen = CreatePen(PS_ALTERNATE, 1, GetSysColor(COLOR_WINDOWTEXT));
1120     hOldPen = SelectObject(hdc, hNewPen);
1121     oldDrawMode = SetROP2(hdc, R2_XORPEN);
1122     oldBkMode = SetBkMode(hdc, TRANSPARENT);
1123
1124     Rectangle(hdc, rc->left, rc->top, rc->right, rc->bottom);
1125
1126     SetBkMode(hdc, oldBkMode);
1127     SetROP2(hdc, oldDrawMode);
1128     SelectObject(hdc, hOldPen);
1129     DeleteObject(hNewPen);
1130     SelectObject(hdc, hOldBrush);
1131
1132     return TRUE;
1133 }
1134
1135
1136 /**********************************************************************
1137  *              DrawAnimatedRects (USER32.@)
1138  */
1139 BOOL WINAPI DrawAnimatedRects( HWND hwnd, INT idAni,
1140                                    const RECT* lprcFrom,
1141                                    const RECT* lprcTo )
1142 {
1143     FIXME_(win)("(%p,%d,%p,%p): stub\n",hwnd,idAni,lprcFrom,lprcTo);
1144     return TRUE;
1145 }
1146
1147
1148 /**********************************************************************
1149  *          PAINTING_DrawStateJam
1150  *
1151  * Jams in the requested type in the dc
1152  */
1153 static BOOL PAINTING_DrawStateJam(HDC hdc, UINT opcode,
1154                                   DRAWSTATEPROC func, LPARAM lp, WPARAM wp,
1155                                   LPRECT rc, UINT dtflags, BOOL unicode )
1156 {
1157     HDC memdc;
1158     HBITMAP hbmsave;
1159     BOOL retval;
1160     INT cx = rc->right - rc->left;
1161     INT cy = rc->bottom - rc->top;
1162
1163     switch(opcode)
1164     {
1165     case DST_TEXT:
1166     case DST_PREFIXTEXT:
1167         if(unicode)
1168             return DrawTextW(hdc, (LPWSTR)lp, (INT)wp, rc, dtflags);
1169         else
1170             return DrawTextA(hdc, (LPSTR)lp, (INT)wp, rc, dtflags);
1171
1172     case DST_ICON:
1173         return DrawIcon(hdc, rc->left, rc->top, (HICON)lp);
1174
1175     case DST_BITMAP:
1176         memdc = CreateCompatibleDC(hdc);
1177         if(!memdc) return FALSE;
1178         hbmsave = (HBITMAP)SelectObject(memdc, (HBITMAP)lp);
1179         if(!hbmsave)
1180         {
1181             DeleteDC(memdc);
1182             return FALSE;
1183         }
1184         retval = BitBlt(hdc, rc->left, rc->top, cx, cy, memdc, 0, 0, SRCCOPY);
1185         SelectObject(memdc, hbmsave);
1186         DeleteDC(memdc);
1187         return retval;
1188
1189     case DST_COMPLEX:
1190         if(func) {
1191             BOOL bRet;
1192             /* DRAWSTATEPROC assumes that it draws at the center of coordinates  */
1193
1194             OffsetViewportOrgEx(hdc, rc->left, rc->top, NULL);
1195             bRet = func(hdc, lp, wp, cx, cy);
1196             /* Restore origin */
1197             OffsetViewportOrgEx(hdc, -rc->left, -rc->top, NULL);
1198             return bRet;
1199         } else
1200             return FALSE;
1201     }
1202     return FALSE;
1203 }
1204
1205 /**********************************************************************
1206  *      PAINTING_DrawState()
1207  */
1208 static BOOL PAINTING_DrawState(HDC hdc, HBRUSH hbr, DRAWSTATEPROC func, LPARAM lp, WPARAM wp,
1209                                INT x, INT y, INT cx, INT cy, UINT flags, BOOL unicode )
1210 {
1211     HBITMAP hbm, hbmsave;
1212     HFONT hfsave;
1213     HBRUSH hbsave, hbrtmp = 0;
1214     HDC memdc;
1215     RECT rc;
1216     UINT dtflags = DT_NOCLIP;
1217     COLORREF fg, bg;
1218     UINT opcode = flags & 0xf;
1219     INT len = wp;
1220     BOOL retval, tmp;
1221
1222     if((opcode == DST_TEXT || opcode == DST_PREFIXTEXT) && !len)    /* The string is '\0' terminated */
1223     {
1224         if(unicode)
1225             len = strlenW((LPWSTR)lp);
1226         else
1227             len = strlen((LPSTR)lp);
1228     }
1229
1230     /* Find out what size the image has if not given by caller */
1231     if(!cx || !cy)
1232     {
1233         SIZE s;
1234         CURSORICONINFO *ici;
1235         BITMAP bm;
1236
1237         switch(opcode)
1238         {
1239         case DST_TEXT:
1240         case DST_PREFIXTEXT:
1241             if(unicode)
1242                 retval = GetTextExtentPoint32W(hdc, (LPWSTR)lp, len, &s);
1243             else
1244                 retval = GetTextExtentPoint32A(hdc, (LPSTR)lp, len, &s);
1245             if(!retval) return FALSE;
1246             break;
1247
1248         case DST_ICON:
1249             ici = (CURSORICONINFO *)GlobalLock16((HGLOBAL16)lp);
1250             if(!ici) return FALSE;
1251             s.cx = ici->nWidth;
1252             s.cy = ici->nHeight;
1253             GlobalUnlock16((HGLOBAL16)lp);
1254             break;
1255
1256         case DST_BITMAP:
1257             if(!GetObjectA((HBITMAP)lp, sizeof(bm), &bm))
1258                 return FALSE;
1259             s.cx = bm.bmWidth;
1260             s.cy = bm.bmHeight;
1261             break;
1262
1263         case DST_COMPLEX: /* cx and cy must be set in this mode */
1264             return FALSE;
1265         }
1266
1267         if(!cx) cx = s.cx;
1268         if(!cy) cy = s.cy;
1269     }
1270
1271     rc.left   = x;
1272     rc.top    = y;
1273     rc.right  = x + cx;
1274     rc.bottom = y + cy;
1275
1276     if(flags & DSS_RIGHT)    /* This one is not documented in the win32.hlp file */
1277         dtflags |= DT_RIGHT;
1278     if(opcode == DST_TEXT)
1279         dtflags |= DT_NOPREFIX;
1280
1281     /* For DSS_NORMAL we just jam in the image and return */
1282     if((flags & 0x7ff0) == DSS_NORMAL)
1283     {
1284         return PAINTING_DrawStateJam(hdc, opcode, func, lp, len, &rc, dtflags, unicode);
1285     }
1286
1287     /* For all other states we need to convert the image to B/W in a local bitmap */
1288     /* before it is displayed */
1289     fg = SetTextColor(hdc, RGB(0, 0, 0));
1290     bg = SetBkColor(hdc, RGB(255, 255, 255));
1291     hbm = NULL; hbmsave = NULL;
1292     memdc = NULL; hbsave = NULL;
1293     retval = FALSE; /* assume failure */
1294
1295     /* From here on we must use "goto cleanup" when something goes wrong */
1296     hbm     = CreateBitmap(cx, cy, 1, 1, NULL);
1297     if(!hbm) goto cleanup;
1298     memdc   = CreateCompatibleDC(hdc);
1299     if(!memdc) goto cleanup;
1300     hbmsave = (HBITMAP)SelectObject(memdc, hbm);
1301     if(!hbmsave) goto cleanup;
1302     rc.left = rc.top = 0;
1303     rc.right = cx;
1304     rc.bottom = cy;
1305     if(!FillRect(memdc, &rc, (HBRUSH)GetStockObject(WHITE_BRUSH))) goto cleanup;
1306     SetBkColor(memdc, RGB(255, 255, 255));
1307     SetTextColor(memdc, RGB(0, 0, 0));
1308     hfsave  = (HFONT)SelectObject(memdc, GetCurrentObject(hdc, OBJ_FONT));
1309
1310     /* DST_COMPLEX may draw text as well,
1311      * so we must be sure that correct font is selected
1312      */
1313     if(!hfsave && (opcode <= DST_PREFIXTEXT)) goto cleanup;
1314     tmp = PAINTING_DrawStateJam(memdc, opcode, func, lp, len, &rc, dtflags, unicode);
1315     if(hfsave) SelectObject(memdc, hfsave);
1316     if(!tmp) goto cleanup;
1317
1318     /* This state cause the image to be dithered */
1319     if(flags & DSS_UNION)
1320     {
1321         hbsave = (HBRUSH)SelectObject(memdc, CACHE_GetPattern55AABrush());
1322         if(!hbsave) goto cleanup;
1323         tmp = PatBlt(memdc, 0, 0, cx, cy, 0x00FA0089);
1324         SelectObject(memdc, hbsave);
1325         if(!tmp) goto cleanup;
1326     }
1327
1328     if (flags & DSS_DISABLED)
1329        hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DHILIGHT));
1330     else if (flags & DSS_DEFAULT)
1331        hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DSHADOW));
1332
1333     /* Draw light or dark shadow */
1334     if (flags & (DSS_DISABLED|DSS_DEFAULT))
1335     {
1336        if(!hbrtmp) goto cleanup;
1337        hbsave = (HBRUSH)SelectObject(hdc, hbrtmp);
1338        if(!hbsave) goto cleanup;
1339        if(!BitBlt(hdc, x+1, y+1, cx, cy, memdc, 0, 0, 0x00B8074A)) goto cleanup;
1340        SelectObject(hdc, hbsave);
1341        DeleteObject(hbrtmp);
1342        hbrtmp = 0;
1343     }
1344
1345     if (flags & DSS_DISABLED)
1346     {
1347        hbr = hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DSHADOW));
1348        if(!hbrtmp) goto cleanup;
1349     }
1350     else if (!hbr)
1351     {
1352        hbr = (HBRUSH)GetStockObject(BLACK_BRUSH);
1353     }
1354
1355     hbsave = (HBRUSH)SelectObject(hdc, hbr);
1356
1357     if(!BitBlt(hdc, x, y, cx, cy, memdc, 0, 0, 0x00B8074A)) goto cleanup;
1358
1359     retval = TRUE; /* We succeeded */
1360
1361 cleanup:
1362     SetTextColor(hdc, fg);
1363     SetBkColor(hdc, bg);
1364
1365     if(hbsave)  SelectObject(hdc, hbsave);
1366     if(hbmsave) SelectObject(memdc, hbmsave);
1367     if(hbrtmp)  DeleteObject(hbrtmp);
1368     if(hbm)     DeleteObject(hbm);
1369     if(memdc)   DeleteDC(memdc);
1370
1371     return retval;
1372 }
1373
1374 /**********************************************************************
1375  *              DrawStateA (USER32.@)
1376  */
1377 BOOL WINAPI DrawStateA(HDC hdc, HBRUSH hbr,
1378                    DRAWSTATEPROC func, LPARAM ldata, WPARAM wdata,
1379                    INT x, INT y, INT cx, INT cy, UINT flags)
1380 {
1381     return PAINTING_DrawState(hdc, hbr, func, ldata, wdata, x, y, cx, cy, flags, FALSE);
1382 }
1383
1384 /**********************************************************************
1385  *              DrawStateW (USER32.@)
1386  */
1387 BOOL WINAPI DrawStateW(HDC hdc, HBRUSH hbr,
1388                    DRAWSTATEPROC func, LPARAM ldata, WPARAM wdata,
1389                    INT x, INT y, INT cx, INT cy, UINT flags)
1390 {
1391     return PAINTING_DrawState(hdc, hbr, func, ldata, wdata, x, y, cx, cy, flags, TRUE);
1392 }
1393
1394
1395 /***********************************************************************
1396  *              SelectPalette (Not a Windows API)
1397  */
1398 HPALETTE WINAPI SelectPalette( HDC hDC, HPALETTE hPal, BOOL bForceBackground )
1399 {
1400     WORD wBkgPalette = 1;
1401
1402     if (!bForceBackground && (hPal != GetStockObject(DEFAULT_PALETTE)))
1403     {
1404         HWND hwnd = WindowFromDC( hDC );
1405         if (hwnd)
1406         {
1407             HWND hForeground = GetForegroundWindow();
1408             /* set primary palette if it's related to current active */
1409             if (hForeground == hwnd || IsChild(hForeground,hwnd)) wBkgPalette = 0;
1410         }
1411     }
1412     return pfnGDISelectPalette( hDC, hPal, wBkgPalette);
1413 }
1414
1415
1416 /***********************************************************************
1417  *              UserRealizePalette (USER32.@)
1418  */
1419 UINT WINAPI UserRealizePalette( HDC hDC )
1420 {
1421     UINT realized = pfnGDIRealizePalette( hDC );
1422
1423     /* do not send anything if no colors were changed */
1424     if (realized && IsDCCurrentPalette16( HDC_16(hDC) ))
1425     {
1426         /* send palette change notification */
1427         HWND hWnd = WindowFromDC( hDC );
1428         if (hWnd) SendMessageA( HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0L);
1429     }
1430     return realized;
1431 }