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 "config.h"
  23 #include "wine/port.h"
  24
  25 #include <stdarg.h>
  26 #include <string.h>
  27 #include "windef.h"
  28 #include "winbase.h"
  29 #include "wingdi.h"
  30 #include "wine/winuser16.h"
  31 #include "wownt32.h"
  32 #include "wine/unicode.h"
  33 #include "wine/server.h"
  34 #include "user.h"
  35 #include "win.h"
  36 #include "message.h"
  37 #include "dce.h"
  38 #include "wine/debug.h"
  39
  40 WINE_DEFAULT_DEBUG_CHANNEL(win);
  41 WINE_DECLARE_DEBUG_CHANNEL(nonclient);
  42
  43 /* client rect in window coordinates */
  44
  45 #define GETCLIENTRECTW( wnd, r )        (r).left = (wnd)->rectClient.left - (wnd)->rectWindow.left; \
  46                                         (r).top = (wnd)->rectClient.top - (wnd)->rectWindow.top; \
  47                                         (r).right = (wnd)->rectClient.right - (wnd)->rectWindow.left; \
  48                                         (r).bottom = (wnd)->rectClient.bottom - (wnd)->rectWindow.top
  49
  50   /* PAINT_RedrawWindow() control flags */
  51 #define RDW_EX_DELAY_NCPAINT    0x0020
  52
  53   /* WIN_UpdateNCRgn() flags */
  54 #define UNC_CHECK               0x0001
  55 #define UNC_ENTIRE              0x0002
  56 #define UNC_REGION              0x0004
  57 #define UNC_UPDATE              0x0008
  58 #define UNC_DELAY_NCPAINT       0x0010
  59 #define UNC_IN_BEGINPAINT       0x0020
  60
  61   /* Last COLOR id */
  62 #define COLOR_MAX   COLOR_GRADIENTINACTIVECAPTION
  63
  64 HPALETTE (WINAPI *pfnGDISelectPalette)(HDC hdc, HPALETTE hpal, WORD bkgnd ) = NULL;
  65 UINT (WINAPI *pfnGDIRealizePalette)(HDC hdc) = NULL;
  66
  67
  68 /***********************************************************************
  69  *           add_paint_count
  70  *
  71  * Add an increment (normally 1 or -1) to the current paint count of a window.
  72  */
  73 static void add_paint_count( HWND hwnd, int incr )
  74 {
  75     SERVER_START_REQ( inc_window_paint_count )
  76     {
  77         req->handle = hwnd;
  78         req->incr   = incr;
  79         wine_server_call( req );
  80     }
  81     SERVER_END_REQ;
  82 }
  83
  84
  85 /***********************************************************************
  86  *           crop_rgn
  87  *
  88  * hSrc:        Region to crop.
  89  * lpRect:      Clipping rectangle.
  90  *
  91  * hDst: Region to hold the result (a new region is created if it's 0).
  92  *       Allowed to be the same region as hSrc in which case everything
  93  *       will be done in place, with no memory reallocations.
  94  *
  95  * Returns: hDst if success, 0 otherwise.
  96  */
  97 static HRGN crop_rgn( HRGN hDst, HRGN hSrc, const RECT *rect )
  98 {
  99     HRGN h = CreateRectRgnIndirect( rect );
 100     if (hDst == 0) hDst = h;
 101     CombineRgn( hDst, hSrc, h, RGN_AND );
 102     if (hDst != h) DeleteObject( h );
 103     return hDst;
 104 }
 105
 106
 107 /***********************************************************************
 108  *           WIN_HaveToDelayNCPAINT
 109  *
 110  * Currently, in the Wine painting mechanism, the WM_NCPAINT message
 111  * is generated as soon as a region intersecting the non-client area
 112  * of a window is invalidated.
 113  *
 114  * This technique will work fine for all windows whose parents
 115  * have the WS_CLIPCHILDREN style. When the parents have that style,
 116  * they are not going to override the contents of their children.
 117  * However, when the parent doesn't have that style, Windows relies
 118  * on a "painter's algorithm" to display the contents of the windows.
 119  * That is, windows are painted from back to front. This includes the
 120  * non-client area.
 121  *
 122  * This method looks at the current state of a window to determine
 123  * if the sending of the WM_NCPAINT message should be delayed until
 124  * the BeginPaint call.
 125  *
 126  * PARAMS:
 127  *   wndPtr   - A Locked window pointer to the window we're
 128  *              examining.
 129  *   uncFlags - This is the flag passed to the WIN_UpdateNCRgn
 130  *              function. This is a shortcut for the cases when
 131  *              we already know when to avoid scanning all the
 132  *              parents of a window. If you already know that this
 133  *              window's NCPAINT should be delayed, set the
 134  *              UNC_DELAY_NCPAINT flag for this parameter.
 135  *
 136  *              This shortcut behavior is implemented in the
 137  *              RDW_Paint() method.
 138  *
 139  */
 140 static BOOL WIN_HaveToDelayNCPAINT( HWND hwnd, UINT uncFlags)
 141 {
 142   /*
 143    * Test the shortcut first. (duh)
 144    */
 145   if (uncFlags & UNC_DELAY_NCPAINT)
 146     return TRUE;
 147
 148   /*
 149    * The UNC_IN_BEGINPAINT flag is set in the BeginPaint
 150    * method only. This is another shortcut to avoid going
 151    * up the parent's chain of the window to finally
 152    * figure-out that none of them has an invalid region.
 153    */
 154   if (uncFlags & UNC_IN_BEGINPAINT)
 155     return FALSE;
 156
 157   /*
 158    * Scan all the parents of this window to find a window
 159    * that doesn't have the WS_CLIPCHILDREN style and that
 160    * has an invalid region.
 161    */
 162   while ((hwnd = GetAncestor( hwnd, GA_PARENT )))
 163   {
 164       WND* parentWnd = WIN_FindWndPtr( hwnd );
 165       if (parentWnd && !(parentWnd->dwStyle & WS_CLIPCHILDREN) && parentWnd->hrgnUpdate)
 166       {
 167           WIN_ReleaseWndPtr( parentWnd );
 168           return TRUE;
 169       }
 170       WIN_ReleaseWndPtr( parentWnd );
 171   }
 172   return FALSE;
 173 }
 174
 175 /***********************************************************************
 176  *           WIN_UpdateNCRgn
 177  *
 178  *  Things to do:
 179  *      Send WM_NCPAINT if required (when nonclient is invalid or UNC_ENTIRE flag is set)
 180  *      Crop hrgnUpdate to a client rect, especially if it 1.
 181  *      If UNC_REGION is set return update region for the client rect.
 182  *
 183  *  NOTE: UNC_REGION is mainly for the RDW_Paint() chunk that sends WM_ERASEBKGND message.
 184  *        The trick is that when the returned region handle may be different from hRgn.
 185  *        In this case the old hRgn must be considered gone. BUT, if the returned value
 186  *        is 1 then the hRgn is preserved and RDW_Paint() will have to get
 187  *        a DC without extra clipping region.
 188  */
 189 static HRGN WIN_UpdateNCRgn(WND* wnd, HRGN hRgn, UINT uncFlags )
 190 {
 191     RECT  r;
 192     HRGN  hClip = 0;
 193     HRGN  hrgnRet = 0;
 194
 195     TRACE_(nonclient)("hwnd %p [%p] hrgn %p, unc %04x, ncf %i\n",
 196                       wnd->hwndSelf, wnd->hrgnUpdate, hRgn, uncFlags, wnd->flags & WIN_NEEDS_NCPAINT);
 197
 198     /* desktop window doesn't have a nonclient area */
 199     if(wnd->hwndSelf == GetDesktopWindow())
 200     {
 201         wnd->flags &= ~WIN_NEEDS_NCPAINT;
 202         if( wnd->hrgnUpdate > (HRGN)1 )
 203         {
 204             if (!hRgn) hRgn = CreateRectRgn( 0, 0, 0, 0 );
 205             CombineRgn( hRgn, wnd->hrgnUpdate, 0, RGN_COPY );
 206             hrgnRet = hRgn;
 207         }
 208         else
 209         {
 210             hrgnRet = wnd->hrgnUpdate;
 211         }
 212         return hrgnRet;
 213     }
 214
 215     if ((wnd->hwndSelf == GetForegroundWindow()) &&
 216         !(wnd->flags & WIN_NCACTIVATED) )
 217     {
 218         wnd->flags |= WIN_NCACTIVATED;
 219         uncFlags |= UNC_ENTIRE;
 220     }
 221
 222     /*
 223      * If the window's non-client area needs to be painted,
 224      */
 225     if ( ( wnd->flags & WIN_NEEDS_NCPAINT ) &&
 226          !WIN_HaveToDelayNCPAINT(wnd->hwndSelf, uncFlags) )
 227     {
 228             RECT r2, r3;
 229
 230             wnd->flags &= ~WIN_NEEDS_NCPAINT;
 231             GETCLIENTRECTW( wnd, r );
 232
 233             TRACE_(nonclient)( "\tclient box (%ld,%ld-%ld,%ld), hrgnUpdate %p\n",
 234                                 r.left, r.top, r.right, r.bottom, wnd->hrgnUpdate );
 235             if( wnd->hrgnUpdate > (HRGN)1 )
 236             {
 237                 /* Check if update rgn overlaps with nonclient area */
 238
 239                 GetRgnBox( wnd->hrgnUpdate, &r2 );
 240                 UnionRect( &r3, &r2, &r );
 241                 if( r3.left != r.left || r3.top != r.top ||
 242                     r3.right != r.right || r3.bottom != r.bottom ) /* it does */
 243                 {
 244                     /* crop hrgnUpdate, save old one in hClip - the only
 245                      * case that places a valid region handle in hClip */
 246
 247                     hClip = wnd->hrgnUpdate;
 248                     wnd->hrgnUpdate = crop_rgn( hRgn, hClip, &r );
 249                     if( uncFlags & UNC_REGION ) hrgnRet = hClip;
 250                 }
 251
 252                 if( uncFlags & UNC_CHECK )
 253                 {
 254                     GetRgnBox( wnd->hrgnUpdate, &r3 );
 255                     if( IsRectEmpty( &r3 ) )
 256                     {
 257                         /* delete the update region since all invalid
 258                          * parts were in the nonclient area */
 259
 260                         DeleteObject( wnd->hrgnUpdate );
 261                         wnd->hrgnUpdate = 0;
 262                         if(!(wnd->flags & WIN_INTERNAL_PAINT))
 263                             add_paint_count( wnd->hwndSelf, -1 );
 264
 265                         wnd->flags &= ~WIN_NEEDS_ERASEBKGND;
 266                     }
 267                 }
 268
 269                 if(!hClip && wnd->hrgnUpdate ) goto copyrgn;
 270             }
 271             else
 272             if( wnd->hrgnUpdate == (HRGN)1 )/* entire window */
 273             {
 274                 if( uncFlags & UNC_UPDATE ) wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 275                 if( uncFlags & UNC_REGION ) hrgnRet = (HRGN)1;
 276                 uncFlags |= UNC_ENTIRE;
 277             }
 278     }
 279     else /* no WM_NCPAINT unless forced */
 280     {
 281         if( wnd->hrgnUpdate >  (HRGN)1 )
 282         {
 283 copyrgn:
 284             if( uncFlags & UNC_REGION )
 285             {
 286                 if (!hRgn) hRgn = CreateRectRgn( 0, 0, 0, 0 );
 287                 CombineRgn( hRgn, wnd->hrgnUpdate, 0, RGN_COPY );
 288                 hrgnRet = hRgn;
 289             }
 290         }
 291         else
 292         if( wnd->hrgnUpdate == (HRGN)1 && (uncFlags & UNC_UPDATE) )
 293         {
 294             GETCLIENTRECTW( wnd, r );
 295             wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 296             if( uncFlags & UNC_REGION ) hrgnRet = (HRGN)1;
 297         }
 298     }
 299
 300     if(!hClip && (uncFlags & UNC_ENTIRE) )
 301     {
 302         /* still don't do anything if there is no nonclient area */
 303         hClip = (HRGN)(memcmp( &wnd->rectWindow, &wnd->rectClient, sizeof(RECT) ) != 0);
 304     }
 305
 306     if( hClip ) /* NOTE: WM_NCPAINT allows wParam to be 1 */
 307     {
 308         if ( hClip == hrgnRet && hrgnRet > (HRGN)1 ) {
 309             hClip = CreateRectRgn( 0, 0, 0, 0 );
 310             CombineRgn( hClip, hrgnRet, 0, RGN_COPY );
 311         }
 312
 313         SendMessageA( wnd->hwndSelf, WM_NCPAINT, (WPARAM)hClip, 0L );
 314         if( (hClip > (HRGN)1) && (hClip != hRgn) && (hClip != hrgnRet) )
 315             DeleteObject( hClip );
 316         /*
 317          * Since all Window locks are suspended while processing the WM_NCPAINT
 318          * we want to make sure the window still exists before continuing.
 319          */
 320         if (!IsWindow(wnd->hwndSelf))
 321         {
 322           DeleteObject(hrgnRet);
 323           hrgnRet=0;
 324         }
 325     }
 326
 327     TRACE_(nonclient)("returning %p (hClip = %p, hrgnUpdate = %p)\n", hrgnRet, hClip, wnd->hrgnUpdate );
 328
 329     return hrgnRet;
 330 }
 331
 332
 333 /***********************************************************************
 334  *              RDW_ValidateParent [RDW_UpdateRgns() helper]
 335  *
 336  *  Validate the portions of parents that are covered by a validated child
 337  *  wndPtr = child
 338  */
 339 static void RDW_ValidateParent(WND *wndChild)
 340 {
 341     HWND parent;
 342     HRGN hrg;
 343
 344     if (wndChild->hrgnUpdate == (HRGN)1 ) {
 345         RECT r;
 346         r.left = 0;
 347         r.top = 0;
 348         r.right = wndChild->rectWindow.right - wndChild->rectWindow.left;
 349         r.bottom = wndChild->rectWindow.bottom - wndChild->rectWindow.top;
 350         hrg = CreateRectRgnIndirect( &r );
 351     } else
 352         hrg = wndChild->hrgnUpdate;
 353
 354     parent = GetAncestor( wndChild->hwndSelf, GA_PARENT );
 355     while (parent && parent != GetDesktopWindow())
 356     {
 357         WND *wndParent = WIN_FindWndPtr( parent );
 358         if (wndParent && !(wndParent->dwStyle & WS_CLIPCHILDREN))
 359         {
 360             if (wndParent->hrgnUpdate != 0)
 361             {
 362                 POINT ptOffset;
 363                 RECT rect, rectParent;
 364                 if( wndParent->hrgnUpdate == (HRGN)1 )
 365                 {
 366                    RECT r;
 367
 368                    r.left = 0;
 369                    r.top = 0;
 370                    r.right = wndParent->rectWindow.right - wndParent->rectWindow.left;
 371                    r.bottom = wndParent->rectWindow.bottom - wndParent->rectWindow.top;
 372
 373                    wndParent->hrgnUpdate = CreateRectRgnIndirect( &r );
 374                 }
 375                 /* we must offset the child region by the offset of the child rect in the parent */
 376                 GetWindowRect(wndParent->hwndSelf, &rectParent);
 377                 GetWindowRect(wndChild->hwndSelf, &rect);
 378                 ptOffset.x = rect.left - rectParent.left;
 379                 ptOffset.y = rect.top - rectParent.top;
 380                 OffsetRgn( hrg, ptOffset.x, ptOffset.y );
 381                 if (CombineRgn( wndParent->hrgnUpdate, wndParent->hrgnUpdate, hrg, RGN_DIFF ) == NULLREGION)
 382                 {
 383                     /* the update region has become empty */
 384                     DeleteObject( wndParent->hrgnUpdate );
 385                     wndParent->hrgnUpdate = 0;
 386                     wndParent->flags &= ~WIN_NEEDS_ERASEBKGND;
 387                     if( !(wndParent->flags & WIN_INTERNAL_PAINT) )
 388                         add_paint_count( wndParent->hwndSelf, -1 );
 389                 }
 390                 OffsetRgn( hrg, -ptOffset.x, -ptOffset.y );
 391             }
 392         }
 393         WIN_ReleaseWndPtr( wndParent );
 394         parent = GetAncestor( parent, GA_PARENT );
 395     }
 396     if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
 397 }
 398
 399 /***********************************************************************
 400  *              RDW_UpdateRgns [RedrawWindow() helper]
 401  *
 402  *  Walks the window tree and adds/removes parts of the hRgn to/from update
 403  *  regions of windows that overlap it. Also, manages internal paint flags.
 404  *
 405  *  NOTE: Walks the window tree so the caller must lock it.
 406  *        MUST preserve hRgn (can modify but then has to restore).
 407  */
 408 static void RDW_UpdateRgns( WND* wndPtr, HRGN hRgn, UINT flags, BOOL firstRecursLevel )
 409 {
 410     /*
 411      * Called only when one of the following is set:
 412      * (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT)
 413      */
 414
 415     BOOL bHadOne =  wndPtr->hrgnUpdate && hRgn;
 416     BOOL bChildren =  (!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
 417                        ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) );
 418     RECT r;
 419
 420     r.left = 0;
 421     r.top = 0;
 422     r.right = wndPtr->rectWindow.right - wndPtr->rectWindow.left;
 423     r.bottom = wndPtr->rectWindow.bottom - wndPtr->rectWindow.top;
 424
 425     TRACE("\thwnd %p [%p] -> hrgn [%p], flags [%04x]\n", wndPtr->hwndSelf, wndPtr->hrgnUpdate, hRgn, flags );
 426
 427     if( flags & RDW_INVALIDATE )
 428     {
 429         if( hRgn > (HRGN)1 )
 430         {
 431             switch ((UINT)wndPtr->hrgnUpdate)
 432             {
 433                 default:
 434                         CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_OR );
 435                         /* fall through */
 436                 case 0:
 437                         wndPtr->hrgnUpdate = crop_rgn( wndPtr->hrgnUpdate,
 438                                                        wndPtr->hrgnUpdate ? wndPtr->hrgnUpdate : hRgn,
 439                                                        &r );
 440                         if( !bHadOne )
 441                         {
 442                             GetRgnBox( wndPtr->hrgnUpdate, &r );
 443                             if( IsRectEmpty( &r ) )
 444                             {
 445                                 DeleteObject( wndPtr->hrgnUpdate );
 446                                 wndPtr->hrgnUpdate = 0;
 447                                 goto end;
 448                             }
 449                         }
 450                         break;
 451                 case 1: /* already an entire window */
 452                         break;
 453             }
 454         }
 455         else if( hRgn == (HRGN)1 )
 456         {
 457             if( wndPtr->hrgnUpdate > (HRGN)1 )
 458                 DeleteObject( wndPtr->hrgnUpdate );
 459             wndPtr->hrgnUpdate = (HRGN)1;
 460         }
 461         else
 462         {
 463             /* hRgn is zero */
 464             if( wndPtr->hrgnUpdate > (HRGN)1)
 465             {
 466                 GetRgnBox( wndPtr->hrgnUpdate, &r );
 467                 if( IsRectEmpty( &r ) )
 468                 {
 469                     DeleteObject( wndPtr->hrgnUpdate );
 470                     wndPtr->hrgnUpdate = 0;
 471                     goto end;
 472                 }
 473             }
 474             hRgn = wndPtr->hrgnUpdate;  /* this is a trick that depends
 475                                          * on code in RDW_Paint() */
 476         }
 477
 478         if( !bHadOne && !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 479             add_paint_count( wndPtr->hwndSelf, 1 );
 480
 481         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 482         if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 483         flags    |= RDW_FRAME;
 484     }
 485     else if( flags & RDW_VALIDATE )
 486     {
 487         if( wndPtr->hrgnUpdate )
 488         {
 489             if( hRgn > (HRGN)1 )
 490             {
 491                 if( wndPtr->hrgnUpdate == (HRGN)1 )
 492                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r );
 493
 494                 if( CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_DIFF )
 495                     == NULLREGION )
 496                 {
 497                     DeleteObject( wndPtr->hrgnUpdate );
 498                     wndPtr->hrgnUpdate = 0;
 499                 }
 500             }
 501             else /* validate everything */
 502             {
 503                 if( wndPtr->hrgnUpdate > (HRGN)1 ) DeleteObject( wndPtr->hrgnUpdate );
 504                 wndPtr->hrgnUpdate = 0;
 505             }
 506
 507             if( !wndPtr->hrgnUpdate )
 508             {
 509                 wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 510                 if( !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 511                     add_paint_count( wndPtr->hwndSelf, -1 );
 512             }
 513         }
 514
 515         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 516         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 517
 518     }
 519
 520     if ((firstRecursLevel) && (wndPtr->hrgnUpdate != 0) && (flags & RDW_UPDATENOW))
 521         RDW_ValidateParent(wndPtr); /* validate parent covered by region */
 522
 523     /* in/validate child windows that intersect with the region if it
 524      * is a valid handle. */
 525
 526     if( flags & (RDW_INVALIDATE | RDW_VALIDATE) )
 527     {
 528         HWND *list;
 529         if( hRgn > (HRGN)1 && bChildren && (list = WIN_ListChildren( wndPtr->hwndSelf )))
 530         {
 531             POINT ptTotal, prevOrigin = {0,0};
 532             POINT ptClient;
 533             INT i;
 534
 535             ptClient.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 536             ptClient.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 537
 538             for(i = ptTotal.x = ptTotal.y = 0; list[i]; i++)
 539             {
 540                 WND *wnd = WIN_FindWndPtr( list[i] );
 541                 if (!wnd) continue;
 542                 if( wnd->dwStyle & WS_VISIBLE )
 543                 {
 544                     POINT ptOffset;
 545
 546                     r.left = wnd->rectWindow.left + ptClient.x;
 547                     r.right = wnd->rectWindow.right + ptClient.x;
 548                     r.top = wnd->rectWindow.top + ptClient.y;
 549                     r.bottom = wnd->rectWindow.bottom + ptClient.y;
 550
 551                     ptOffset.x = r.left - prevOrigin.x;
 552                     ptOffset.y = r.top - prevOrigin.y;
 553                     OffsetRect( &r, -ptTotal.x, -ptTotal.y );
 554
 555                     if( RectInRegion( hRgn, &r ) )
 556                     {
 557                         OffsetRgn( hRgn, -ptOffset.x, -ptOffset.y );
 558                         RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 559                         prevOrigin.x = r.left + ptTotal.x;
 560                         prevOrigin.y = r.top + ptTotal.y;
 561                         ptTotal.x += ptOffset.x;
 562                         ptTotal.y += ptOffset.y;
 563                     }
 564                 }
 565                 WIN_ReleaseWndPtr( wnd );
 566             }
 567             HeapFree( GetProcessHeap(), 0, list );
 568             OffsetRgn( hRgn, ptTotal.x, ptTotal.y );
 569             bChildren = 0;
 570         }
 571     }
 572
 573     /* handle hRgn == 1 (alias for entire window) and/or internal paint recursion */
 574
 575     if( bChildren )
 576     {
 577         HWND *list;
 578         if ((list = WIN_ListChildren( wndPtr->hwndSelf )))
 579         {
 580             INT i;
 581             for (i = 0; list[i]; i++)
 582             {
 583                 WND *wnd = WIN_FindWndPtr( list[i] );
 584                 if (!wnd) continue;
 585                 if( wnd->dwStyle & WS_VISIBLE )
 586                     RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 587                 WIN_ReleaseWndPtr( wnd );
 588             }
 589             HeapFree( GetProcessHeap(), 0, list );
 590         }
 591     }
 592
 593 end:
 594
 595     /* Set/clear internal paint flag */
 596
 597     if (flags & RDW_INTERNALPAINT)
 598     {
 599         if ( !wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 600             add_paint_count( wndPtr->hwndSelf, 1 );
 601         wndPtr->flags |= WIN_INTERNAL_PAINT;
 602     }
 603     else if (flags & RDW_NOINTERNALPAINT)
 604     {
 605         if ( !wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
 606             add_paint_count( wndPtr->hwndSelf, -1 );
 607         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 608     }
 609 }
 610
 611 /***********************************************************************
 612  *           RDW_Paint [RedrawWindow() helper]
 613  *
 614  * Walks the window tree and paints/erases windows that have
 615  * nonzero update regions according to redraw flags. hrgn is a scratch
 616  * region passed down during recursion. Must not be 1.
 617  *
 618  */
 619 static HRGN RDW_Paint( WND* wndPtr, HRGN hrgn, UINT flags, UINT ex )
 620 {
 621 /* NOTE: wndPtr is locked by caller.
 622  *
 623  * FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask
 624  * SendMessage() calls. This is a comment inside DefWindowProc() source
 625  * from 16-bit SDK:
 626  *
 627  *   This message avoids lots of inter-app message traffic
 628  *   by switching to the other task and continuing the
 629  *   recursion there.
 630  *
 631  * wParam         = flags
 632  * LOWORD(lParam) = hrgnClip
 633  * HIWORD(lParam) = hwndSkip  (not used; always NULL)
 634  *
 635  */
 636     HDC  hDC;
 637     HWND hWnd = wndPtr->hwndSelf;
 638     BOOL bIcon = ((wndPtr->dwStyle & WS_MINIMIZE) && GetClassLongA(hWnd, GCL_HICON));
 639
 640       /* Erase/update the window itself ... */
 641
 642     TRACE("\thwnd %p [%p] -> hrgn [%p], flags [%04x]\n", hWnd, wndPtr->hrgnUpdate, hrgn, flags );
 643
 644     /*
 645      * Check if this window should delay it's processing of WM_NCPAINT.
 646      * See WIN_HaveToDelayNCPAINT for a description of the mechanism
 647      */
 648     if ((ex & RDW_EX_DELAY_NCPAINT) || WIN_HaveToDelayNCPAINT(wndPtr->hwndSelf, 0) )
 649         ex |= RDW_EX_DELAY_NCPAINT;
 650
 651     if (flags & RDW_UPDATENOW)
 652     {
 653         if (wndPtr->hrgnUpdate) /* wm_painticon wparam is 1 */
 654             SendMessageW( hWnd, (bIcon) ? WM_PAINTICON : WM_PAINT, bIcon, 0 );
 655     }
 656     else if (flags & RDW_ERASENOW)
 657     {
 658         UINT dcx = DCX_INTERSECTRGN | DCX_USESTYLE | DCX_KEEPCLIPRGN | DCX_WINDOWPAINT | DCX_CACHE;
 659         HRGN hrgnRet;
 660
 661         hrgnRet = WIN_UpdateNCRgn(wndPtr,
 662                                   hrgn,
 663                                   UNC_REGION | UNC_CHECK |
 664                                   ((ex & RDW_EX_DELAY_NCPAINT) ? UNC_DELAY_NCPAINT : 0) );
 665
 666         if( hrgnRet )
 667         {
 668             if( hrgnRet > (HRGN)1 ) hrgn = hrgnRet; else hrgnRet = 0; /* entire client */
 669             if( wndPtr->flags & WIN_NEEDS_ERASEBKGND )
 670             {
 671                 if( bIcon ) dcx |= DCX_WINDOW;
 672                 else
 673                 if( hrgnRet )
 674                     OffsetRgn( hrgnRet, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 675                                         wndPtr->rectWindow.top  - wndPtr->rectClient.top);
 676                 else
 677                     dcx &= ~DCX_INTERSECTRGN;
 678                 if (( hDC = GetDCEx( hWnd, hrgnRet, dcx )) )
 679                 {
 680                     if (SendMessageW( hWnd, (bIcon) ? WM_ICONERASEBKGND : WM_ERASEBKGND,
 681                                       (WPARAM)hDC, 0 ))
 682                         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 683                     ReleaseDC( hWnd, hDC );
 684                 }
 685             }
 686         }
 687     }
 688
 689     if( !IsWindow(hWnd) ) return hrgn;
 690
 691       /* ... and its child windows */
 692
 693     if(!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
 694        ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) )
 695     {
 696         HWND *list, *phwnd;
 697
 698         if( (list = WIN_ListChildren( wndPtr->hwndSelf )) )
 699         {
 700             for (phwnd = list; *phwnd; phwnd++)
 701             {
 702                 if (!(wndPtr = WIN_FindWndPtr( *phwnd ))) continue;
 703                 if ( (wndPtr->dwStyle & WS_VISIBLE) &&
 704                      (wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT)) )
 705                     hrgn = RDW_Paint( wndPtr, hrgn, flags, ex );
 706                 WIN_ReleaseWndPtr(wndPtr);
 707             }
 708             HeapFree( GetProcessHeap(), 0, list );
 709         }
 710     }
 711
 712     return hrgn;
 713 }
 714
 715
 716 /***********************************************************************
 717  *           dump_rdw_flags
 718  */
 719 static void dump_rdw_flags(UINT flags)
 720 {
 721     TRACE("flags:");
 722     if (flags & RDW_INVALIDATE) TRACE(" RDW_INVALIDATE");
 723     if (flags & RDW_INTERNALPAINT) TRACE(" RDW_INTERNALPAINT");
 724     if (flags & RDW_ERASE) TRACE(" RDW_ERASE");
 725     if (flags & RDW_VALIDATE) TRACE(" RDW_VALIDATE");
 726     if (flags & RDW_NOINTERNALPAINT) TRACE(" RDW_NOINTERNALPAINT");
 727     if (flags & RDW_NOERASE) TRACE(" RDW_NOERASE");
 728     if (flags & RDW_NOCHILDREN) TRACE(" RDW_NOCHILDREN");
 729     if (flags & RDW_ALLCHILDREN) TRACE(" RDW_ALLCHILDREN");
 730     if (flags & RDW_UPDATENOW) TRACE(" RDW_UPDATENOW");
 731     if (flags & RDW_ERASENOW) TRACE(" RDW_ERASENOW");
 732     if (flags & RDW_FRAME) TRACE(" RDW_FRAME");
 733     if (flags & RDW_NOFRAME) TRACE(" RDW_NOFRAME");
 734
 735 #define RDW_FLAGS \
 736     (RDW_INVALIDATE | \
 737     RDW_INTERNALPAINT | \
 738     RDW_ERASE | \
 739     RDW_VALIDATE | \
 740     RDW_NOINTERNALPAINT | \
 741     RDW_NOERASE | \
 742     RDW_NOCHILDREN | \
 743     RDW_ALLCHILDREN | \
 744     RDW_UPDATENOW | \
 745     RDW_ERASENOW | \
 746     RDW_FRAME | \
 747     RDW_NOFRAME)
 748
 749     if (flags & ~RDW_FLAGS) TRACE(" %04x", flags & ~RDW_FLAGS);
 750     TRACE("\n");
 751 #undef RDW_FLAGS
 752 }
 753
 754
 755 /***********************************************************************
 756  *              RedrawWindow (USER32.@)
 757  */
 758 BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rectUpdate,
 759                               HRGN hrgnUpdate, UINT flags )
 760 {
 761     HRGN hRgn = 0;
 762     RECT r, r2;
 763     POINT pt;
 764     WND* wndPtr;
 765
 766     if (!hwnd) hwnd = GetDesktopWindow();
 767
 768     /* check if the window or its parents are visible/not minimized */
 769
 770     if (!WIN_IsWindowDrawable( hwnd, !(flags & RDW_FRAME) )) return TRUE;
 771
 772     /* process pending events and messages before painting */
 773     if (flags & RDW_UPDATENOW)
 774         MsgWaitForMultipleObjects( 0, NULL, FALSE, 0, QS_ALLINPUT );
 775
 776     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 777     if (TRACE_ON(win))
 778     {
 779         if( hrgnUpdate )
 780         {
 781             GetRgnBox( hrgnUpdate, &r );
 782             TRACE( "%p (%p) NULL %p box (%ld,%ld-%ld,%ld) flags=%04x\n",
 783                   hwnd, wndPtr->hrgnUpdate, hrgnUpdate, r.left, r.top, r.right, r.bottom, flags );
 784         }
 785         else
 786         {
 787             if( rectUpdate )
 788                 r = *rectUpdate;
 789             else
 790                 SetRectEmpty( &r );
 791             TRACE( "%p (%p) %s %ld,%ld-%ld,%ld %p flags=%04x\n",
 792                    hwnd, wndPtr->hrgnUpdate, rectUpdate ? "rect" : "NULL", r.left,
 793                    r.top, r.right, r.bottom, hrgnUpdate, flags );
 794         }
 795         dump_rdw_flags(flags);
 796     }
 797
 798     /* prepare an update region in window coordinates */
 799
 800     if (((flags & (RDW_INVALIDATE|RDW_FRAME)) == (RDW_INVALIDATE|RDW_FRAME)) ||
 801         ((flags & (RDW_VALIDATE|RDW_NOFRAME)) == (RDW_VALIDATE|RDW_NOFRAME)))
 802         r = wndPtr->rectWindow;
 803     else
 804         r = wndPtr->rectClient;
 805
 806     pt.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 807     pt.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 808     OffsetRect( &r, -wndPtr->rectClient.left, -wndPtr->rectClient.top );
 809
 810     if (flags & RDW_INVALIDATE)  /* ------------------------- Invalidate */
 811     {
 812         /* If the window doesn't have hrgnUpdate we leave hRgn zero
 813          * and put a new region straight into wndPtr->hrgnUpdate
 814          * so that RDW_UpdateRgns() won't have to do any extra work.
 815          */
 816
 817         if( hrgnUpdate )
 818         {
 819             if( wndPtr->hrgnUpdate )
 820             {
 821                 hRgn = CreateRectRgn( 0, 0, 0, 0 );
 822                 CombineRgn( hRgn, hrgnUpdate, 0, RGN_COPY );
 823                 OffsetRgn( hRgn, pt.x, pt.y );
 824             }
 825             else
 826             {
 827                 wndPtr->hrgnUpdate = crop_rgn( 0, hrgnUpdate, &r );
 828                 OffsetRgn( wndPtr->hrgnUpdate, pt.x, pt.y );
 829             }
 830         }
 831         else if( rectUpdate )
 832         {
 833             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 834             OffsetRect( &r2, pt.x, pt.y );
 835             if( wndPtr->hrgnUpdate == 0 )
 836                 wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 837             else
 838                 hRgn = CreateRectRgnIndirect( &r2 );
 839         }
 840         else /* entire window or client depending on RDW_FRAME */
 841         {
 842             if( flags & RDW_FRAME )
 843             {
 844                 if (wndPtr->hrgnUpdate) hRgn = (HRGN)1;
 845                 else wndPtr->hrgnUpdate = (HRGN)1;
 846             }
 847             else
 848             {
 849                 GETCLIENTRECTW( wndPtr, r2 );
 850                 if( wndPtr->hrgnUpdate == 0 )
 851                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 852                 else
 853                     hRgn = CreateRectRgnIndirect( &r2 );
 854             }
 855         }
 856     }
 857     else if (flags & RDW_VALIDATE)  /* ------------------------- Validate */
 858     {
 859         /* In this we cannot leave with zero hRgn */
 860         if( hrgnUpdate )
 861         {
 862             hRgn = crop_rgn( hRgn, hrgnUpdate,  &r );
 863             OffsetRgn( hRgn, pt.x, pt.y );
 864             GetRgnBox( hRgn, &r2 );
 865             if( IsRectEmpty( &r2 ) ) goto END;
 866         }
 867         else if( rectUpdate )
 868         {
 869             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 870                 OffsetRect( &r2, pt.x, pt.y );
 871             hRgn = CreateRectRgnIndirect( &r2 );
 872         }
 873         else /* entire window or client depending on RDW_NOFRAME */
 874         {
 875             if( flags & RDW_NOFRAME )
 876                 hRgn = (HRGN)1;
 877             else
 878             {
 879                 GETCLIENTRECTW( wndPtr, r2 );
 880                 hRgn = CreateRectRgnIndirect( &r2 );
 881             }
 882         }
 883     }
 884
 885     /* At this point hRgn is either an update region in window coordinates or 1 or 0 */
 886
 887     RDW_UpdateRgns( wndPtr, hRgn, flags, TRUE );
 888
 889     /* Erase/update windows, from now on hRgn is a scratch region */
 890
 891     hRgn = RDW_Paint( wndPtr, (hRgn == (HRGN)1) ? 0 : hRgn, flags, 0 );
 892
 893 END:
 894     if( hRgn > (HRGN)1 && (hRgn != hrgnUpdate) )
 895         DeleteObject(hRgn );
 896     WIN_ReleaseWndPtr(wndPtr);
 897     return TRUE;
 898 }
 899
 900
 901 /***********************************************************************
 902  *              UpdateWindow (USER32.@)
 903  */
 904 BOOL WINAPI UpdateWindow( HWND hwnd )
 905 {
 906     return RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN );
 907 }
 908
 909
 910 /***********************************************************************
 911  *              InvalidateRgn (USER32.@)
 912  */
 913 BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 914 {
 915     return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 916 }
 917
 918
 919 /***********************************************************************
 920  *              InvalidateRect (USER32.@)
 921  */
 922 BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
 923 {
 924     return RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 925 }
 926
 927
 928 /***********************************************************************
 929  *              ValidateRgn (USER32.@)
 930  */
 931 BOOL WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
 932 {
 933     return RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
 934 }
 935
 936
 937 /***********************************************************************
 938  *              ValidateRect (USER32.@)
 939  */
 940 BOOL WINAPI ValidateRect( HWND hwnd, const RECT *rect )
 941 {
 942     return RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 943 }
 944
 945
 946 /***********************************************************************
 947  *              FillRect (USER.81)
 948  * NOTE
 949  *   The Win16 variant doesn't support special color brushes like
 950  *   the Win32 one, despite the fact that Win16, as well as Win32,
 951  *   supports special background brushes for a window class.
 952  */
 953 INT16 WINAPI FillRect16( HDC16 hdc, const RECT16 *rect, HBRUSH16 hbrush )
 954 {
 955     HBRUSH prevBrush;
 956
 957     /* coordinates are logical so we cannot fast-check 'rect',
 958      * it will be done later in the PatBlt().
 959      */
 960
 961     if (!(prevBrush = SelectObject( HDC_32(hdc), HBRUSH_32(hbrush) ))) return 0;
 962     PatBlt( HDC_32(hdc), rect->left, rect->top,
 963               rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
 964     SelectObject( HDC_32(hdc), prevBrush );
 965     return 1;
 966 }
 967
 968
 969 /***********************************************************************
 970  *              FillRect (USER32.@)
 971  */
 972 INT WINAPI FillRect( HDC hdc, const RECT *rect, HBRUSH hbrush )
 973 {
 974     HBRUSH prevBrush;
 975
 976     if (hbrush <= (HBRUSH) (COLOR_MAX + 1)) {
 977         hbrush = GetSysColorBrush( (INT) hbrush - 1 );
 978     }
 979
 980     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
 981     PatBlt( hdc, rect->left, rect->top,
 982               rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
 983     SelectObject( hdc, prevBrush );
 984     return 1;
 985 }
 986
 987
 988 /***********************************************************************
 989  *              InvertRect (USER.82)
 990  */
 991 void WINAPI InvertRect16( HDC16 hdc, const RECT16 *rect )
 992 {
 993     PatBlt( HDC_32(hdc), rect->left, rect->top,
 994               rect->right - rect->left, rect->bottom - rect->top, DSTINVERT );
 995 }
 996
 997
 998 /***********************************************************************
 999  *              InvertRect (USER32.@)
1000  */
1001 BOOL WINAPI InvertRect( HDC hdc, const RECT *rect )
1002 {
1003     return PatBlt( hdc, rect->left, rect->top,
1004                      rect->right - rect->left, rect->bottom - rect->top,
1005                      DSTINVERT );
1006 }
1007
1008
1009 /***********************************************************************
1010  *              FrameRect (USER32.@)
1011  */
1012 INT WINAPI FrameRect( HDC hdc, const RECT *rect, HBRUSH hbrush )
1013 {
1014     HBRUSH prevBrush;
1015     RECT r = *rect;
1016
1017     if ( (r.right <= r.left) || (r.bottom <= r.top) ) return 0;
1018     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
1019
1020     PatBlt( hdc, r.left, r.top, 1,
1021               r.bottom - r.top, PATCOPY );
1022     PatBlt( hdc, r.right - 1, r.top, 1,
1023               r.bottom - r.top, PATCOPY );
1024     PatBlt( hdc, r.left, r.top,
1025               r.right - r.left, 1, PATCOPY );
1026     PatBlt( hdc, r.left, r.bottom - 1,
1027               r.right - r.left, 1, PATCOPY );
1028
1029     SelectObject( hdc, prevBrush );
1030     return TRUE;
1031 }
1032
1033
1034 /***********************************************************************
1035  *              FrameRect (USER.83)
1036  */
1037 INT16 WINAPI FrameRect16( HDC16 hdc, const RECT16 *rect16, HBRUSH16 hbrush )
1038 {
1039     RECT rect;
1040     CONV_RECT16TO32( rect16, &rect );
1041     return FrameRect( HDC_32(hdc), &rect, HBRUSH_32(hbrush) );
1042 }
1043
1044
1045 /***********************************************************************
1046  *              DrawFocusRect (USER.466)
1047  */
1048 void WINAPI DrawFocusRect16( HDC16 hdc, const RECT16* rc )
1049 {
1050     RECT rect32;
1051     CONV_RECT16TO32( rc, &rect32 );
1052     DrawFocusRect( HDC_32(hdc), &rect32 );
1053 }
1054
1055
1056 /***********************************************************************
1057  *              DrawFocusRect (USER32.@)
1058  *
1059  * FIXME: PatBlt(PATINVERT) with background brush.
1060  */
1061 BOOL WINAPI DrawFocusRect( HDC hdc, const RECT* rc )
1062 {
1063     HBRUSH hOldBrush;
1064     HPEN hOldPen, hNewPen;
1065     INT oldDrawMode, oldBkMode;
1066
1067     hOldBrush = SelectObject(hdc, GetStockObject(NULL_BRUSH));
1068     hNewPen = CreatePen(PS_ALTERNATE, 1, GetSysColor(COLOR_WINDOWTEXT));
1069     hOldPen = SelectObject(hdc, hNewPen);
1070     oldDrawMode = SetROP2(hdc, R2_XORPEN);
1071     oldBkMode = SetBkMode(hdc, TRANSPARENT);
1072
1073     Rectangle(hdc, rc->left, rc->top, rc->right, rc->bottom);
1074
1075     SetBkMode(hdc, oldBkMode);
1076     SetROP2(hdc, oldDrawMode);
1077     SelectObject(hdc, hOldPen);
1078     DeleteObject(hNewPen);
1079     SelectObject(hdc, hOldBrush);
1080
1081     return TRUE;
1082 }
1083
1084
1085 /**********************************************************************
1086  *              DrawAnimatedRects (USER32.@)
1087  */
1088 BOOL WINAPI DrawAnimatedRects( HWND hwnd, INT idAni,
1089                                    const RECT* lprcFrom,
1090                                    const RECT* lprcTo )
1091 {
1092     FIXME("(%p,%d,%p,%p): stub\n",hwnd,idAni,lprcFrom,lprcTo);
1093     return TRUE;
1094 }
1095
1096
1097 /**********************************************************************
1098  *          PAINTING_DrawStateJam
1099  *
1100  * Jams in the requested type in the dc
1101  */
1102 static BOOL PAINTING_DrawStateJam(HDC hdc, UINT opcode,
1103                                   DRAWSTATEPROC func, LPARAM lp, WPARAM wp,
1104                                   LPRECT rc, UINT dtflags, BOOL unicode )
1105 {
1106     HDC memdc;
1107     HBITMAP hbmsave;
1108     BOOL retval;
1109     INT cx = rc->right - rc->left;
1110     INT cy = rc->bottom - rc->top;
1111
1112     switch(opcode)
1113     {
1114     case DST_TEXT:
1115     case DST_PREFIXTEXT:
1116         if(unicode)
1117             return DrawTextW(hdc, (LPWSTR)lp, (INT)wp, rc, dtflags);
1118         else
1119             return DrawTextA(hdc, (LPSTR)lp, (INT)wp, rc, dtflags);
1120
1121     case DST_ICON:
1122         return DrawIcon(hdc, rc->left, rc->top, (HICON)lp);
1123
1124     case DST_BITMAP:
1125         memdc = CreateCompatibleDC(hdc);
1126         if(!memdc) return FALSE;
1127         hbmsave = (HBITMAP)SelectObject(memdc, (HBITMAP)lp);
1128         if(!hbmsave)
1129         {
1130             DeleteDC(memdc);
1131             return FALSE;
1132         }
1133         retval = BitBlt(hdc, rc->left, rc->top, cx, cy, memdc, 0, 0, SRCCOPY);
1134         SelectObject(memdc, hbmsave);
1135         DeleteDC(memdc);
1136         return retval;
1137
1138     case DST_COMPLEX:
1139         if(func) {
1140             BOOL bRet;
1141             /* DRAWSTATEPROC assumes that it draws at the center of coordinates  */
1142
1143             OffsetViewportOrgEx(hdc, rc->left, rc->top, NULL);
1144             bRet = func(hdc, lp, wp, cx, cy);
1145             /* Restore origin */
1146             OffsetViewportOrgEx(hdc, -rc->left, -rc->top, NULL);
1147             return bRet;
1148         } else
1149             return FALSE;
1150     }
1151     return FALSE;
1152 }
1153
1154 /**********************************************************************
1155  *      PAINTING_DrawState()
1156  */
1157 static BOOL PAINTING_DrawState(HDC hdc, HBRUSH hbr, DRAWSTATEPROC func, LPARAM lp, WPARAM wp,
1158                                INT x, INT y, INT cx, INT cy, UINT flags, BOOL unicode )
1159 {
1160     HBITMAP hbm, hbmsave;
1161     HFONT hfsave;
1162     HBRUSH hbsave, hbrtmp = 0;
1163     HDC memdc;
1164     RECT rc;
1165     UINT dtflags = DT_NOCLIP;
1166     COLORREF fg, bg;
1167     UINT opcode = flags & 0xf;
1168     INT len = wp;
1169     BOOL retval, tmp;
1170
1171     if((opcode == DST_TEXT || opcode == DST_PREFIXTEXT) && !len)    /* The string is '\0' terminated */
1172     {
1173         if(unicode)
1174             len = strlenW((LPWSTR)lp);
1175         else
1176             len = strlen((LPSTR)lp);
1177     }
1178
1179     /* Find out what size the image has if not given by caller */
1180     if(!cx || !cy)
1181     {
1182         SIZE s;
1183         CURSORICONINFO *ici;
1184         BITMAP bm;
1185
1186         switch(opcode)
1187         {
1188         case DST_TEXT:
1189         case DST_PREFIXTEXT:
1190             if(unicode)
1191                 retval = GetTextExtentPoint32W(hdc, (LPWSTR)lp, len, &s);
1192             else
1193                 retval = GetTextExtentPoint32A(hdc, (LPSTR)lp, len, &s);
1194             if(!retval) return FALSE;
1195             break;
1196
1197         case DST_ICON:
1198             ici = (CURSORICONINFO *)GlobalLock16((HGLOBAL16)lp);
1199             if(!ici) return FALSE;
1200             s.cx = ici->nWidth;
1201             s.cy = ici->nHeight;
1202             GlobalUnlock16((HGLOBAL16)lp);
1203             break;
1204
1205         case DST_BITMAP:
1206             if(!GetObjectA((HBITMAP)lp, sizeof(bm), &bm))
1207                 return FALSE;
1208             s.cx = bm.bmWidth;
1209             s.cy = bm.bmHeight;
1210             break;
1211
1212         case DST_COMPLEX: /* cx and cy must be set in this mode */
1213             return FALSE;
1214         }
1215
1216         if(!cx) cx = s.cx;
1217         if(!cy) cy = s.cy;
1218     }
1219
1220     rc.left   = x;
1221     rc.top    = y;
1222     rc.right  = x + cx;
1223     rc.bottom = y + cy;
1224
1225     if(flags & DSS_RIGHT)    /* This one is not documented in the win32.hlp file */
1226         dtflags |= DT_RIGHT;
1227     if(opcode == DST_TEXT)
1228         dtflags |= DT_NOPREFIX;
1229
1230     /* For DSS_NORMAL we just jam in the image and return */
1231     if((flags & 0x7ff0) == DSS_NORMAL)
1232     {
1233         return PAINTING_DrawStateJam(hdc, opcode, func, lp, len, &rc, dtflags, unicode);
1234     }
1235
1236     /* For all other states we need to convert the image to B/W in a local bitmap */
1237     /* before it is displayed */
1238     fg = SetTextColor(hdc, RGB(0, 0, 0));
1239     bg = SetBkColor(hdc, RGB(255, 255, 255));
1240     hbm = NULL; hbmsave = NULL;
1241     memdc = NULL; hbsave = NULL;
1242     retval = FALSE; /* assume failure */
1243
1244     /* From here on we must use "goto cleanup" when something goes wrong */
1245     hbm     = CreateBitmap(cx, cy, 1, 1, NULL);
1246     if(!hbm) goto cleanup;
1247     memdc   = CreateCompatibleDC(hdc);
1248     if(!memdc) goto cleanup;
1249     hbmsave = (HBITMAP)SelectObject(memdc, hbm);
1250     if(!hbmsave) goto cleanup;
1251     rc.left = rc.top = 0;
1252     rc.right = cx;
1253     rc.bottom = cy;
1254     if(!FillRect(memdc, &rc, (HBRUSH)GetStockObject(WHITE_BRUSH))) goto cleanup;
1255     SetBkColor(memdc, RGB(255, 255, 255));
1256     SetTextColor(memdc, RGB(0, 0, 0));
1257     hfsave  = (HFONT)SelectObject(memdc, GetCurrentObject(hdc, OBJ_FONT));
1258
1259     /* DST_COMPLEX may draw text as well,
1260      * so we must be sure that correct font is selected
1261      */
1262     if(!hfsave && (opcode <= DST_PREFIXTEXT)) goto cleanup;
1263     tmp = PAINTING_DrawStateJam(memdc, opcode, func, lp, len, &rc, dtflags, unicode);
1264     if(hfsave) SelectObject(memdc, hfsave);
1265     if(!tmp) goto cleanup;
1266
1267     /* This state cause the image to be dithered */
1268     if(flags & DSS_UNION)
1269     {
1270         hbsave = (HBRUSH)SelectObject(memdc, CACHE_GetPattern55AABrush());
1271         if(!hbsave) goto cleanup;
1272         tmp = PatBlt(memdc, 0, 0, cx, cy, 0x00FA0089);
1273         SelectObject(memdc, hbsave);
1274         if(!tmp) goto cleanup;
1275     }
1276
1277     if (flags & DSS_DISABLED)
1278        hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DHILIGHT));
1279     else if (flags & DSS_DEFAULT)
1280        hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DSHADOW));
1281
1282     /* Draw light or dark shadow */
1283     if (flags & (DSS_DISABLED|DSS_DEFAULT))
1284     {
1285        if(!hbrtmp) goto cleanup;
1286        hbsave = (HBRUSH)SelectObject(hdc, hbrtmp);
1287        if(!hbsave) goto cleanup;
1288        if(!BitBlt(hdc, x+1, y+1, cx, cy, memdc, 0, 0, 0x00B8074A)) goto cleanup;
1289        SelectObject(hdc, hbsave);
1290        DeleteObject(hbrtmp);
1291        hbrtmp = 0;
1292     }
1293
1294     if (flags & DSS_DISABLED)
1295     {
1296        hbr = hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DSHADOW));
1297        if(!hbrtmp) goto cleanup;
1298     }
1299     else if (!hbr)
1300     {
1301        hbr = (HBRUSH)GetStockObject(BLACK_BRUSH);
1302     }
1303
1304     hbsave = (HBRUSH)SelectObject(hdc, hbr);
1305
1306     if(!BitBlt(hdc, x, y, cx, cy, memdc, 0, 0, 0x00B8074A)) goto cleanup;
1307
1308     retval = TRUE; /* We succeeded */
1309
1310 cleanup:
1311     SetTextColor(hdc, fg);
1312     SetBkColor(hdc, bg);
1313
1314     if(hbsave)  SelectObject(hdc, hbsave);
1315     if(hbmsave) SelectObject(memdc, hbmsave);
1316     if(hbrtmp)  DeleteObject(hbrtmp);
1317     if(hbm)     DeleteObject(hbm);
1318     if(memdc)   DeleteDC(memdc);
1319
1320     return retval;
1321 }
1322
1323 /**********************************************************************
1324  *              DrawStateA (USER32.@)
1325  */
1326 BOOL WINAPI DrawStateA(HDC hdc, HBRUSH hbr,
1327                    DRAWSTATEPROC func, LPARAM ldata, WPARAM wdata,
1328                    INT x, INT y, INT cx, INT cy, UINT flags)
1329 {
1330     return PAINTING_DrawState(hdc, hbr, func, ldata, wdata, x, y, cx, cy, flags, FALSE);
1331 }
1332
1333 /**********************************************************************
1334  *              DrawStateW (USER32.@)
1335  */
1336 BOOL WINAPI DrawStateW(HDC hdc, HBRUSH hbr,
1337                    DRAWSTATEPROC func, LPARAM ldata, WPARAM wdata,
1338                    INT x, INT y, INT cx, INT cy, UINT flags)
1339 {
1340     return PAINTING_DrawState(hdc, hbr, func, ldata, wdata, x, y, cx, cy, flags, TRUE);
1341 }
1342
1343
1344 /***********************************************************************
1345  *              SelectPalette (Not a Windows API)
1346  */
1347 HPALETTE WINAPI SelectPalette( HDC hDC, HPALETTE hPal, BOOL bForceBackground )
1348 {
1349     WORD wBkgPalette = 1;
1350
1351     if (!bForceBackground && (hPal != GetStockObject(DEFAULT_PALETTE)))
1352     {
1353         HWND hwnd = WindowFromDC( hDC );
1354         if (hwnd)
1355         {
1356             HWND hForeground = GetForegroundWindow();
1357             /* set primary palette if it's related to current active */
1358             if (hForeground == hwnd || IsChild(hForeground,hwnd)) wBkgPalette = 0;
1359         }
1360     }
1361     return pfnGDISelectPalette( hDC, hPal, wBkgPalette);
1362 }
1363
1364
1365 /***********************************************************************
1366  *              UserRealizePalette (USER32.@)
1367  */
1368 UINT WINAPI UserRealizePalette( HDC hDC )
1369 {
1370     UINT realized = pfnGDIRealizePalette( hDC );
1371
1372     /* do not send anything if no colors were changed */
1373     if (realized && IsDCCurrentPalette16( HDC_16(hDC) ))
1374     {
1375         /* send palette change notification */
1376         HWND hWnd = WindowFromDC( hDC );
1377         if (hWnd) SendMessageTimeoutW( HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0,
1378                                        SMTO_ABORTIFHUNG, 2000, NULL );
1379     }
1380     return realized;
1381 }