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 "wine/unicode.h"
  27 #include "wine/server.h"
  28 #include "gdi.h"
  29 #include "user.h"
  30 #include "win.h"
  31 #include "queue.h"
  32 #include "dce.h"
  33 #include "wine/debug.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(win);
  36 WINE_DECLARE_DEBUG_CHANNEL(nonclient);
  37
  38 /* client rect in window coordinates */
  39
  40 #define GETCLIENTRECTW( wnd, r )        (r).left = (wnd)->rectClient.left - (wnd)->rectWindow.left; \
  41                                         (r).top = (wnd)->rectClient.top - (wnd)->rectWindow.top; \
  42                                         (r).right = (wnd)->rectClient.right - (wnd)->rectWindow.left; \
  43                                         (r).bottom = (wnd)->rectClient.bottom - (wnd)->rectWindow.top
  44
  45   /* PAINT_RedrawWindow() control flags */
  46 #define RDW_EX_DELAY_NCPAINT    0x0020
  47
  48   /* WIN_UpdateNCRgn() flags */
  49 #define UNC_CHECK               0x0001
  50 #define UNC_ENTIRE              0x0002
  51 #define UNC_REGION              0x0004
  52 #define UNC_UPDATE              0x0008
  53 #define UNC_DELAY_NCPAINT       0x0010
  54 #define UNC_IN_BEGINPAINT       0x0020
  55
  56   /* Last COLOR id */
  57 #define COLOR_MAX   COLOR_GRADIENTINACTIVECAPTION
  58
  59
  60 /* ### start build ### */
  61 extern WORD CALLBACK PAINTING_CallTo16_word_wlwww(DRAWSTATEPROC16,WORD,LONG,WORD,WORD,WORD);
  62 /* ### stop build ### */
  63
  64 struct draw_state_info
  65 {
  66     DRAWSTATEPROC16 proc;
  67     LPARAM          param;
  68 };
  69
  70 /* callback for 16-bit DrawState functions */
  71 static BOOL CALLBACK draw_state_callback( HDC hdc, LPARAM lparam, WPARAM wparam, int cx, int cy )
  72 {
  73     const struct draw_state_info *info = (struct draw_state_info *)lparam;
  74     return PAINTING_CallTo16_word_wlwww( info->proc, hdc, info->param, wparam, cx, cy );
  75 }
  76
  77
  78 /***********************************************************************
  79  *           add_paint_count
  80  *
  81  * Add an increment (normally 1 or -1) to the current paint count of a window.
  82  */
  83 static void add_paint_count( HWND hwnd, int incr )
  84 {
  85     SERVER_START_REQ( inc_window_paint_count )
  86     {
  87         req->handle = hwnd;
  88         req->incr   = incr;
  89         wine_server_call( req );
  90     }
  91     SERVER_END_REQ;
  92 }
  93
  94
  95 /***********************************************************************
  96  *           WIN_HaveToDelayNCPAINT
  97  *
  98  * Currently, in the Wine painting mechanism, the WM_NCPAINT message
  99  * is generated as soon as a region intersecting the non-client area
 100  * of a window is invalidated.
 101  *
 102  * This technique will work fine for all windows whose parents
 103  * have the WS_CLIPCHILDREN style. When the parents have that style,
 104  * they are not going to override the contents of their children.
 105  * However, when the parent doesn't have that style, Windows relies
 106  * on a "painter's algorithm" to display the contents of the windows.
 107  * That is, windows are painted from back to front. This includes the
 108  * non-client area.
 109  *
 110  * This method looks at the current state of a window to determine
 111  * if the sending of the WM_NCPAINT message should be delayed until
 112  * the BeginPaint call.
 113  *
 114  * PARAMS:
 115  *   wndPtr   - A Locked window pointer to the window we're
 116  *              examining.
 117  *   uncFlags - This is the flag passed to the WIN_UpdateNCRgn
 118  *              function. This is a shortcut for the cases when
 119  *              we already know when to avoid scanning all the
 120  *              parents of a window. If you already know that this
 121  *              window's NCPAINT should be delayed, set the
 122  *              UNC_DELAY_NCPAINT flag for this parameter.
 123  *
 124  *              This shortcut behavior is implemented in the
 125  *              RDW_Paint() method.
 126  *
 127  */
 128 static BOOL WIN_HaveToDelayNCPAINT( HWND hwnd, UINT uncFlags)
 129 {
 130   /*
 131    * Test the shortcut first. (duh)
 132    */
 133   if (uncFlags & UNC_DELAY_NCPAINT)
 134     return TRUE;
 135
 136   /*
 137    * The UNC_IN_BEGINPAINT flag is set in the BeginPaint
 138    * method only. This is another shortcut to avoid going
 139    * up the parent's chain of the window to finally
 140    * figure-out that none of them has an invalid region.
 141    */
 142   if (uncFlags & UNC_IN_BEGINPAINT)
 143     return FALSE;
 144
 145   /*
 146    * Scan all the parents of this window to find a window
 147    * that doesn't have the WS_CLIPCHILDREN style and that
 148    * has an invalid region.
 149    */
 150   while ((hwnd = GetAncestor( hwnd, GA_PARENT )))
 151   {
 152       WND* parentWnd = WIN_FindWndPtr( hwnd );
 153       if (parentWnd && !(parentWnd->dwStyle & WS_CLIPCHILDREN) && parentWnd->hrgnUpdate)
 154       {
 155           WIN_ReleaseWndPtr( parentWnd );
 156           return TRUE;
 157       }
 158       WIN_ReleaseWndPtr( parentWnd );
 159   }
 160   return FALSE;
 161 }
 162
 163 /***********************************************************************
 164  *           WIN_UpdateNCRgn
 165  *
 166  *  Things to do:
 167  *      Send WM_NCPAINT if required (when nonclient is invalid or UNC_ENTIRE flag is set)
 168  *      Crop hrgnUpdate to a client rect, especially if it 1.
 169  *      If UNC_REGION is set return update region for the client rect.
 170  *
 171  *  NOTE: UNC_REGION is mainly for the RDW_Paint() chunk that sends WM_ERASEBKGND message.
 172  *        The trick is that when the returned region handle may be different from hRgn.
 173  *        In this case the old hRgn must be considered gone. BUT, if the returned value
 174  *        is 1 then the hRgn is preserved and RDW_Paint() will have to get
 175  *        a DC without extra clipping region.
 176  */
 177 static HRGN WIN_UpdateNCRgn(WND* wnd, HRGN hRgn, UINT uncFlags )
 178 {
 179     RECT  r;
 180     HRGN  hClip = 0;
 181     HRGN  hrgnRet = 0;
 182
 183     TRACE_(nonclient)("hwnd %04x [%04x] hrgn %04x, unc %04x, ncf %i\n",
 184                       wnd->hwndSelf, wnd->hrgnUpdate, hRgn, uncFlags, wnd->flags & WIN_NEEDS_NCPAINT);
 185
 186     /* desktop window doesn't have a nonclient area */
 187     if(wnd->hwndSelf == GetDesktopWindow())
 188     {
 189         wnd->flags &= ~WIN_NEEDS_NCPAINT;
 190         if( wnd->hrgnUpdate > 1 )
 191             hrgnRet = REGION_CropRgn( hRgn, wnd->hrgnUpdate, NULL, NULL );
 192         else
 193         {
 194             hrgnRet = wnd->hrgnUpdate;
 195         }
 196         return hrgnRet;
 197     }
 198
 199     if ((wnd->hwndSelf == GetForegroundWindow()) &&
 200         !(wnd->flags & WIN_NCACTIVATED) )
 201     {
 202         wnd->flags |= WIN_NCACTIVATED;
 203         uncFlags |= UNC_ENTIRE;
 204     }
 205
 206     /*
 207      * If the window's non-client area needs to be painted,
 208      */
 209     if ( ( wnd->flags & WIN_NEEDS_NCPAINT ) &&
 210          !WIN_HaveToDelayNCPAINT(wnd->hwndSelf, uncFlags) )
 211     {
 212             RECT r2, r3;
 213
 214             wnd->flags &= ~WIN_NEEDS_NCPAINT;
 215             GETCLIENTRECTW( wnd, r );
 216
 217             TRACE_(nonclient)( "\tclient box (%i,%i-%i,%i), hrgnUpdate %04x\n",
 218                                 r.left, r.top, r.right, r.bottom, wnd->hrgnUpdate );
 219             if( wnd->hrgnUpdate > 1 )
 220             {
 221                 /* Check if update rgn overlaps with nonclient area */
 222
 223                 GetRgnBox( wnd->hrgnUpdate, &r2 );
 224                 UnionRect( &r3, &r2, &r );
 225                 if( r3.left != r.left || r3.top != r.top ||
 226                     r3.right != r.right || r3.bottom != r.bottom ) /* it does */
 227                 {
 228                     /* crop hrgnUpdate, save old one in hClip - the only
 229                      * case that places a valid region handle in hClip */
 230
 231                     hClip = wnd->hrgnUpdate;
 232                     wnd->hrgnUpdate = REGION_CropRgn( hRgn, hClip, &r, NULL );
 233                     if( uncFlags & UNC_REGION ) hrgnRet = hClip;
 234                 }
 235
 236                 if( uncFlags & UNC_CHECK )
 237                 {
 238                     GetRgnBox( wnd->hrgnUpdate, &r3 );
 239                     if( IsRectEmpty( &r3 ) )
 240                     {
 241                         /* delete the update region since all invalid
 242                          * parts were in the nonclient area */
 243
 244                         DeleteObject( wnd->hrgnUpdate );
 245                         wnd->hrgnUpdate = 0;
 246                         if(!(wnd->flags & WIN_INTERNAL_PAINT))
 247                             add_paint_count( wnd->hwndSelf, -1 );
 248
 249                         wnd->flags &= ~WIN_NEEDS_ERASEBKGND;
 250                     }
 251                 }
 252
 253                 if(!hClip && wnd->hrgnUpdate ) goto copyrgn;
 254             }
 255             else
 256             if( wnd->hrgnUpdate == 1 )/* entire window */
 257             {
 258                 if( uncFlags & UNC_UPDATE ) wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 259                 if( uncFlags & UNC_REGION ) hrgnRet = 1;
 260                 uncFlags |= UNC_ENTIRE;
 261             }
 262     }
 263     else /* no WM_NCPAINT unless forced */
 264     {
 265         if( wnd->hrgnUpdate >  1 )
 266         {
 267 copyrgn:
 268             if( uncFlags & UNC_REGION )
 269                 hrgnRet = REGION_CropRgn( hRgn, wnd->hrgnUpdate, NULL, NULL );
 270         }
 271         else
 272         if( wnd->hrgnUpdate == 1 && (uncFlags & UNC_UPDATE) )
 273         {
 274             GETCLIENTRECTW( wnd, r );
 275             wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 276             if( uncFlags & UNC_REGION ) hrgnRet = 1;
 277         }
 278     }
 279
 280     if(!hClip && (uncFlags & UNC_ENTIRE) )
 281     {
 282         /* still don't do anything if there is no nonclient area */
 283         hClip = (memcmp( &wnd->rectWindow, &wnd->rectClient, sizeof(RECT) ) != 0);
 284     }
 285
 286     if( hClip ) /* NOTE: WM_NCPAINT allows wParam to be 1 */
 287     {
 288         if ( hClip == hrgnRet && hrgnRet > 1 ) {
 289             hClip = CreateRectRgn( 0, 0, 0, 0 );
 290             CombineRgn( hClip, hrgnRet, 0, RGN_COPY );
 291         }
 292
 293         SendMessageA( wnd->hwndSelf, WM_NCPAINT, hClip, 0L );
 294         if( (hClip > 1) && (hClip != hRgn) && (hClip != hrgnRet) )
 295             DeleteObject( hClip );
 296         /*
 297          * Since all Window locks are suspended while processing the WM_NCPAINT
 298          * we want to make sure the window still exists before continuing.
 299          */
 300         if (!IsWindow(wnd->hwndSelf))
 301         {
 302           DeleteObject(hrgnRet);
 303           hrgnRet=0;
 304         }
 305     }
 306
 307     TRACE_(nonclient)("returning %04x (hClip = %04x, hrgnUpdate = %04x)\n", hrgnRet, hClip, wnd->hrgnUpdate );
 308
 309     return hrgnRet;
 310 }
 311
 312
 313 /***********************************************************************
 314  *              RDW_ValidateParent [RDW_UpdateRgns() helper]
 315  *
 316  *  Validate the portions of parents that are covered by a validated child
 317  *  wndPtr = child
 318  */
 319 static void RDW_ValidateParent(WND *wndChild)
 320 {
 321     HWND parent;
 322     HRGN hrg;
 323
 324     if (wndChild->hrgnUpdate == 1 ) {
 325         RECT r;
 326         r.left = 0;
 327         r.top = 0;
 328         r.right = wndChild->rectWindow.right - wndChild->rectWindow.left;
 329         r.bottom = wndChild->rectWindow.bottom - wndChild->rectWindow.top;
 330         hrg = CreateRectRgnIndirect( &r );
 331     } else
 332         hrg = wndChild->hrgnUpdate;
 333
 334     parent = GetAncestor( wndChild->hwndSelf, GA_PARENT );
 335     while (parent && parent != GetDesktopWindow())
 336     {
 337         WND *wndParent = WIN_FindWndPtr( parent );
 338         if (wndParent && !(wndParent->dwStyle & WS_CLIPCHILDREN))
 339         {
 340             if (wndParent->hrgnUpdate != 0)
 341             {
 342                 POINT ptOffset;
 343                 RECT rect, rectParent;
 344                 if( wndParent->hrgnUpdate == 1 )
 345                 {
 346                    RECT r;
 347
 348                    r.left = 0;
 349                    r.top = 0;
 350                    r.right = wndParent->rectWindow.right - wndParent->rectWindow.left;
 351                    r.bottom = wndParent->rectWindow.bottom - wndParent->rectWindow.top;
 352
 353                    wndParent->hrgnUpdate = CreateRectRgnIndirect( &r );
 354                 }
 355                 /* we must offset the child region by the offset of the child rect in the parent */
 356                 GetWindowRect(wndParent->hwndSelf, &rectParent);
 357                 GetWindowRect(wndChild->hwndSelf, &rect);
 358                 ptOffset.x = rect.left - rectParent.left;
 359                 ptOffset.y = rect.top - rectParent.top;
 360                 OffsetRgn( hrg, ptOffset.x, ptOffset.y );
 361                 CombineRgn( wndParent->hrgnUpdate, wndParent->hrgnUpdate, hrg, RGN_DIFF );
 362                 OffsetRgn( hrg, -ptOffset.x, -ptOffset.y );
 363             }
 364         }
 365         WIN_ReleaseWndPtr( wndParent );
 366         parent = GetAncestor( parent, GA_PARENT );
 367     }
 368     if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
 369 }
 370
 371 /***********************************************************************
 372  *              RDW_UpdateRgns [RedrawWindow() helper]
 373  *
 374  *  Walks the window tree and adds/removes parts of the hRgn to/from update
 375  *  regions of windows that overlap it. Also, manages internal paint flags.
 376  *
 377  *  NOTE: Walks the window tree so the caller must lock it.
 378  *        MUST preserve hRgn (can modify but then has to restore).
 379  */
 380 static void RDW_UpdateRgns( WND* wndPtr, HRGN hRgn, UINT flags, BOOL firstRecursLevel )
 381 {
 382     /*
 383      * Called only when one of the following is set:
 384      * (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT)
 385      */
 386
 387     BOOL bHadOne =  wndPtr->hrgnUpdate && hRgn;
 388     BOOL bChildren =  (!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
 389                        ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) );
 390     RECT r;
 391
 392     r.left = 0;
 393     r.top = 0;
 394     r.right = wndPtr->rectWindow.right - wndPtr->rectWindow.left;
 395     r.bottom = wndPtr->rectWindow.bottom - wndPtr->rectWindow.top;
 396
 397     TRACE("\thwnd %04x [%04x] -> hrgn [%04x], flags [%04x]\n", wndPtr->hwndSelf, wndPtr->hrgnUpdate, hRgn, flags );
 398
 399     if( flags & RDW_INVALIDATE )
 400     {
 401         if( hRgn > 1 )
 402         {
 403             switch( wndPtr->hrgnUpdate )
 404             {
 405                 default:
 406                         CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_OR );
 407                         /* fall through */
 408                 case 0:
 409                         wndPtr->hrgnUpdate = REGION_CropRgn( wndPtr->hrgnUpdate,
 410                                                              wndPtr->hrgnUpdate ? wndPtr->hrgnUpdate : hRgn,
 411                                                              &r, NULL );
 412                         if( !bHadOne )
 413                         {
 414                             GetRgnBox( wndPtr->hrgnUpdate, &r );
 415                             if( IsRectEmpty( &r ) )
 416                             {
 417                                 DeleteObject( wndPtr->hrgnUpdate );
 418                                 wndPtr->hrgnUpdate = 0;
 419                                 goto end;
 420                             }
 421                         }
 422                         break;
 423                 case 1: /* already an entire window */
 424                         break;
 425             }
 426         }
 427         else if( hRgn == 1 )
 428         {
 429             if( wndPtr->hrgnUpdate > 1 )
 430                 DeleteObject( wndPtr->hrgnUpdate );
 431             wndPtr->hrgnUpdate = 1;
 432         }
 433         else
 434             hRgn = wndPtr->hrgnUpdate;  /* this is a trick that depends on code in PAINT_RedrawWindow() */
 435
 436         if( !bHadOne && !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 437             add_paint_count( wndPtr->hwndSelf, 1 );
 438
 439         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 440         if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 441         flags    |= RDW_FRAME;
 442     }
 443     else if( flags & RDW_VALIDATE )
 444     {
 445         if( wndPtr->hrgnUpdate )
 446         {
 447             if( hRgn > 1 )
 448             {
 449                 if( wndPtr->hrgnUpdate == 1 )
 450                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r );
 451
 452                 if( CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_DIFF )
 453                     == NULLREGION )
 454                 {
 455                     DeleteObject( wndPtr->hrgnUpdate );
 456                     wndPtr->hrgnUpdate = 0;
 457                 }
 458             }
 459             else /* validate everything */
 460             {
 461                 if( wndPtr->hrgnUpdate > 1 ) DeleteObject( wndPtr->hrgnUpdate );
 462                 wndPtr->hrgnUpdate = 0;
 463             }
 464
 465             if( !wndPtr->hrgnUpdate )
 466             {
 467                 wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 468                 if( !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 469                     add_paint_count( wndPtr->hwndSelf, -1 );
 470             }
 471         }
 472
 473         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 474         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 475
 476     }
 477
 478     if ((firstRecursLevel) && (wndPtr->hrgnUpdate != 0) && (flags & RDW_UPDATENOW))
 479         RDW_ValidateParent(wndPtr); /* validate parent covered by region */
 480
 481     /* in/validate child windows that intersect with the region if it
 482      * is a valid handle. */
 483
 484     if( flags & (RDW_INVALIDATE | RDW_VALIDATE) )
 485     {
 486         HWND *list;
 487         if( hRgn > 1 && bChildren && (list = WIN_ListChildren( wndPtr->hwndSelf )))
 488         {
 489             POINT ptTotal, prevOrigin = {0,0};
 490             POINT ptClient;
 491             INT i;
 492
 493             ptClient.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 494             ptClient.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 495
 496             for(i = ptTotal.x = ptTotal.y = 0; list[i]; i++)
 497             {
 498                 WND *wnd = WIN_FindWndPtr( list[i] );
 499                 if (!wnd) continue;
 500                 if( wnd->dwStyle & WS_VISIBLE )
 501                 {
 502                     POINT ptOffset;
 503
 504                     r.left = wnd->rectWindow.left + ptClient.x;
 505                     r.right = wnd->rectWindow.right + ptClient.x;
 506                     r.top = wnd->rectWindow.top + ptClient.y;
 507                     r.bottom = wnd->rectWindow.bottom + ptClient.y;
 508
 509                     ptOffset.x = r.left - prevOrigin.x;
 510                     ptOffset.y = r.top - prevOrigin.y;
 511                     OffsetRect( &r, -ptTotal.x, -ptTotal.y );
 512
 513                     if( RectInRegion( hRgn, &r ) )
 514                     {
 515                         OffsetRgn( hRgn, -ptOffset.x, -ptOffset.y );
 516                         RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 517                         prevOrigin.x = r.left + ptTotal.x;
 518                         prevOrigin.y = r.top + ptTotal.y;
 519                         ptTotal.x += ptOffset.x;
 520                         ptTotal.y += ptOffset.y;
 521                     }
 522                 }
 523                 WIN_ReleaseWndPtr( wnd );
 524             }
 525             HeapFree( GetProcessHeap(), 0, list );
 526             OffsetRgn( hRgn, ptTotal.x, ptTotal.y );
 527             bChildren = 0;
 528         }
 529     }
 530
 531     /* handle hRgn == 1 (alias for entire window) and/or internal paint recursion */
 532
 533     if( bChildren )
 534     {
 535         HWND *list;
 536         if ((list = WIN_ListChildren( wndPtr->hwndSelf )))
 537         {
 538             INT i;
 539             for (i = 0; list[i]; i++)
 540             {
 541                 WND *wnd = WIN_FindWndPtr( list[i] );
 542                 if (!wnd) continue;
 543                 if( wnd->dwStyle & WS_VISIBLE )
 544                     RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 545                 WIN_ReleaseWndPtr( wnd );
 546             }
 547             HeapFree( GetProcessHeap(), 0, list );
 548         }
 549     }
 550
 551 end:
 552
 553     /* Set/clear internal paint flag */
 554
 555     if (flags & RDW_INTERNALPAINT)
 556     {
 557         if ( !wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 558             add_paint_count( wndPtr->hwndSelf, 1 );
 559         wndPtr->flags |= WIN_INTERNAL_PAINT;
 560     }
 561     else if (flags & RDW_NOINTERNALPAINT)
 562     {
 563         if ( !wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
 564             add_paint_count( wndPtr->hwndSelf, -1 );
 565         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 566     }
 567 }
 568
 569 /***********************************************************************
 570  *           RDW_Paint [RedrawWindow() helper]
 571  *
 572  * Walks the window tree and paints/erases windows that have
 573  * nonzero update regions according to redraw flags. hrgn is a scratch
 574  * region passed down during recursion. Must not be 1.
 575  *
 576  */
 577 static HRGN RDW_Paint( WND* wndPtr, HRGN hrgn, UINT flags, UINT ex )
 578 {
 579 /* NOTE: wndPtr is locked by caller.
 580  *
 581  * FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask
 582  * SendMessage() calls. This is a comment inside DefWindowProc() source
 583  * from 16-bit SDK:
 584  *
 585  *   This message avoids lots of inter-app message traffic
 586  *   by switching to the other task and continuing the
 587  *   recursion there.
 588  *
 589  * wParam         = flags
 590  * LOWORD(lParam) = hrgnClip
 591  * HIWORD(lParam) = hwndSkip  (not used; always NULL)
 592  *
 593  */
 594     HDC  hDC;
 595     HWND hWnd = wndPtr->hwndSelf;
 596     BOOL bIcon = ((wndPtr->dwStyle & WS_MINIMIZE) && GetClassLongA(hWnd, GCL_HICON));
 597
 598       /* Erase/update the window itself ... */
 599
 600     TRACE("\thwnd %04x [%04x] -> hrgn [%04x], flags [%04x]\n", hWnd, wndPtr->hrgnUpdate, hrgn, flags );
 601
 602     /*
 603      * Check if this window should delay it's processing of WM_NCPAINT.
 604      * See WIN_HaveToDelayNCPAINT for a description of the mechanism
 605      */
 606     if ((ex & RDW_EX_DELAY_NCPAINT) || WIN_HaveToDelayNCPAINT(wndPtr->hwndSelf, 0) )
 607         ex |= RDW_EX_DELAY_NCPAINT;
 608
 609     if (flags & RDW_UPDATENOW)
 610     {
 611         if (wndPtr->hrgnUpdate) /* wm_painticon wparam is 1 */
 612             SendMessageW( hWnd, (bIcon) ? WM_PAINTICON : WM_PAINT, bIcon, 0 );
 613     }
 614     else if (flags & RDW_ERASENOW)
 615     {
 616         UINT dcx = DCX_INTERSECTRGN | DCX_USESTYLE | DCX_KEEPCLIPRGN | DCX_WINDOWPAINT | DCX_CACHE;
 617         HRGN hrgnRet;
 618
 619         hrgnRet = WIN_UpdateNCRgn(wndPtr,
 620                                   hrgn,
 621                                   UNC_REGION | UNC_CHECK |
 622                                   ((ex & RDW_EX_DELAY_NCPAINT) ? UNC_DELAY_NCPAINT : 0) );
 623
 624         if( hrgnRet )
 625         {
 626             if( hrgnRet > 1 ) hrgn = hrgnRet; else hrgnRet = 0; /* entire client */
 627             if( wndPtr->flags & WIN_NEEDS_ERASEBKGND )
 628             {
 629                 if( bIcon ) dcx |= DCX_WINDOW;
 630                 else
 631                 if( hrgnRet )
 632                     OffsetRgn( hrgnRet, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 633                                         wndPtr->rectWindow.top  - wndPtr->rectClient.top);
 634                 else
 635                     dcx &= ~DCX_INTERSECTRGN;
 636                 if (( hDC = GetDCEx( hWnd, hrgnRet, dcx )) )
 637                 {
 638                     if (SendMessageW( hWnd, (bIcon) ? WM_ICONERASEBKGND : WM_ERASEBKGND,
 639                                       (WPARAM)hDC, 0 ))
 640                     wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 641                     ReleaseDC( hWnd, hDC );
 642                 }
 643             }
 644         }
 645     }
 646
 647     if( !IsWindow(hWnd) ) return hrgn;
 648
 649       /* ... and its child windows */
 650
 651     if(!(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE) &&
 652        ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) )
 653     {
 654         HWND *list, *phwnd;
 655
 656         if( (list = WIN_ListChildren( wndPtr->hwndSelf )) )
 657         {
 658             for (phwnd = list; *phwnd; phwnd++)
 659             {
 660                 if (!(wndPtr = WIN_FindWndPtr( *phwnd ))) continue;
 661                 if ( (wndPtr->dwStyle & WS_VISIBLE) &&
 662                      (wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT)) )
 663                     hrgn = RDW_Paint( wndPtr, hrgn, flags, ex );
 664                 WIN_ReleaseWndPtr(wndPtr);
 665             }
 666             HeapFree( GetProcessHeap(), 0, list );
 667         }
 668     }
 669
 670     return hrgn;
 671 }
 672
 673
 674 /***********************************************************************
 675  *              RedrawWindow (USER32.@)
 676  */
 677 BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rectUpdate,
 678                               HRGN hrgnUpdate, UINT flags )
 679 {
 680     HRGN hRgn = 0;
 681     RECT r, r2;
 682     POINT pt;
 683     WND* wndPtr;
 684
 685     if (!hwnd) hwnd = GetDesktopWindow();
 686
 687     /* check if the window or its parents are visible/not minimized */
 688
 689     if (!WIN_IsWindowDrawable( hwnd, !(flags & RDW_FRAME) )) return TRUE;
 690
 691     /* process pending events and messages before painting */
 692     if (flags & RDW_UPDATENOW)
 693         MsgWaitForMultipleObjects( 0, NULL, FALSE, 0, QS_ALLINPUT );
 694
 695     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 696     if (TRACE_ON(win))
 697     {
 698         if( hrgnUpdate )
 699         {
 700             GetRgnBox( hrgnUpdate, &r );
 701             TRACE( "%04x (%04x) NULL %04x box (%i,%i-%i,%i) flags=%04x\n",
 702                   hwnd, wndPtr->hrgnUpdate, hrgnUpdate, r.left, r.top, r.right, r.bottom, flags );
 703         }
 704         else
 705         {
 706             if( rectUpdate )
 707                 r = *rectUpdate;
 708             else
 709                 SetRectEmpty( &r );
 710             TRACE( "%04x (%04x) %s %d,%d-%d,%d %04x flags=%04x\n",
 711                         hwnd, wndPtr->hrgnUpdate, rectUpdate ? "rect" : "NULL", r.left,
 712                         r.top, r.right, r.bottom, hrgnUpdate, flags );
 713         }
 714     }
 715
 716     /* prepare an update region in window coordinates */
 717
 718     if( flags & RDW_FRAME )
 719         r = wndPtr->rectWindow;
 720     else
 721         r = wndPtr->rectClient;
 722
 723     pt.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 724     pt.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 725     OffsetRect( &r, -wndPtr->rectClient.left, -wndPtr->rectClient.top );
 726
 727     if (flags & RDW_INVALIDATE)  /* ------------------------- Invalidate */
 728     {
 729         /* If the window doesn't have hrgnUpdate we leave hRgn zero
 730          * and put a new region straight into wndPtr->hrgnUpdate
 731          * so that RDW_UpdateRgns() won't have to do any extra work.
 732          */
 733
 734         if( hrgnUpdate )
 735         {
 736             if( wndPtr->hrgnUpdate )
 737                 hRgn = REGION_CropRgn( 0, hrgnUpdate, NULL, &pt );
 738             else
 739                 wndPtr->hrgnUpdate = REGION_CropRgn( 0, hrgnUpdate, &r, &pt );
 740         }
 741         else if( rectUpdate )
 742         {
 743             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 744             OffsetRect( &r2, pt.x, pt.y );
 745             if( wndPtr->hrgnUpdate == 0 )
 746                 wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 747             else
 748                 hRgn = CreateRectRgnIndirect( &r2 );
 749         }
 750         else /* entire window or client depending on RDW_FRAME */
 751         {
 752             if( flags & RDW_FRAME )
 753             {
 754                 if (wndPtr->hrgnUpdate) hRgn = 1;
 755                 else wndPtr->hrgnUpdate = 1;
 756             }
 757             else
 758             {
 759                 GETCLIENTRECTW( wndPtr, r2 );
 760                 if( wndPtr->hrgnUpdate == 0 )
 761                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 762                 else
 763                     hRgn = CreateRectRgnIndirect( &r2 );
 764             }
 765         }
 766     }
 767     else if (flags & RDW_VALIDATE)  /* ------------------------- Validate */
 768     {
 769         /* In this we cannot leave with zero hRgn */
 770         if( hrgnUpdate )
 771         {
 772             hRgn = REGION_CropRgn( hRgn, hrgnUpdate,  &r, &pt );
 773             GetRgnBox( hRgn, &r2 );
 774             if( IsRectEmpty( &r2 ) ) goto END;
 775         }
 776         else if( rectUpdate )
 777         {
 778             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 779                 OffsetRect( &r2, pt.x, pt.y );
 780             hRgn = CreateRectRgnIndirect( &r2 );
 781         }
 782         else /* entire window or client depending on RDW_FRAME */
 783         {
 784             if( flags & RDW_FRAME )
 785                 hRgn = 1;
 786             else
 787             {
 788                 GETCLIENTRECTW( wndPtr, r2 );
 789                 hRgn = CreateRectRgnIndirect( &r2 );
 790             }
 791         }
 792     }
 793
 794     /* At this point hRgn is either an update region in window coordinates or 1 or 0 */
 795
 796     RDW_UpdateRgns( wndPtr, hRgn, flags, TRUE );
 797
 798     /* Erase/update windows, from now on hRgn is a scratch region */
 799
 800     hRgn = RDW_Paint( wndPtr, (hRgn == 1) ? 0 : hRgn, flags, 0 );
 801
 802 END:
 803     if( hRgn > 1 && (hRgn != hrgnUpdate) )
 804         DeleteObject(hRgn );
 805     WIN_ReleaseWndPtr(wndPtr);
 806     return TRUE;
 807 }
 808
 809
 810 /***********************************************************************
 811  *              UpdateWindow (USER32.@)
 812  */
 813 void WINAPI UpdateWindow( HWND hwnd )
 814 {
 815     RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN );
 816 }
 817
 818
 819 /***********************************************************************
 820  *              InvalidateRgn (USER32.@)
 821  */
 822 BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 823 {
 824     return RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 825 }
 826
 827
 828 /***********************************************************************
 829  *              InvalidateRect (USER32.@)
 830  */
 831 BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
 832 {
 833     return RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 834 }
 835
 836
 837 /***********************************************************************
 838  *              ValidateRgn (USER32.@)
 839  */
 840 void WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
 841 {
 842     RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
 843 }
 844
 845
 846 /***********************************************************************
 847  *              ValidateRect (USER32.@)
 848  */
 849 void WINAPI ValidateRect( HWND hwnd, const RECT *rect )
 850 {
 851     RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 852 }
 853
 854
 855 /***********************************************************************
 856  *              GetUpdateRect (USER32.@)
 857  */
 858 BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
 859 {
 860     BOOL retvalue;
 861     WND * wndPtr = WIN_FindWndPtr( hwnd );
 862     if (!wndPtr) return FALSE;
 863
 864     if (rect)
 865     {
 866         if (wndPtr->hrgnUpdate > 1)
 867         {
 868             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
 869             if (GetUpdateRgn( hwnd, hrgn, erase ) == ERROR)
 870             {
 871                 retvalue = FALSE;
 872                 goto END;
 873             }
 874             GetRgnBox( hrgn, rect );
 875             DeleteObject( hrgn );
 876             if (GetClassLongA(wndPtr->hwndSelf, GCL_STYLE) & CS_OWNDC)
 877             {
 878                 if (GetMapMode(wndPtr->dce->hDC) != MM_TEXT)
 879                 {
 880                     DPtoLP (wndPtr->dce->hDC, (LPPOINT)rect,  2);
 881                 }
 882             }
 883         }
 884         else
 885         if( wndPtr->hrgnUpdate == 1 )
 886         {
 887             GetClientRect( hwnd, rect );
 888             if (erase) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_ERASENOW | RDW_NOCHILDREN );
 889         }
 890         else
 891             SetRectEmpty( rect );
 892     }
 893     retvalue = (wndPtr->hrgnUpdate >= 1);
 894 END:
 895     WIN_ReleaseWndPtr(wndPtr);
 896     return retvalue;
 897 }
 898
 899
 900 /***********************************************************************
 901  *              GetUpdateRgn (USER32.@)
 902  */
 903 INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 904 {
 905     INT retval;
 906     WND * wndPtr = WIN_FindWndPtr( hwnd );
 907     if (!wndPtr) return ERROR;
 908
 909     if (wndPtr->hrgnUpdate == 0)
 910     {
 911         SetRectRgn( hrgn, 0, 0, 0, 0 );
 912         retval = NULLREGION;
 913         goto END;
 914     }
 915     else
 916     if (wndPtr->hrgnUpdate == 1)
 917     {
 918         SetRectRgn( hrgn, 0, 0, wndPtr->rectClient.right - wndPtr->rectClient.left,
 919                                 wndPtr->rectClient.bottom - wndPtr->rectClient.top );
 920         retval = SIMPLEREGION;
 921     }
 922     else
 923     {
 924         retval = CombineRgn( hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY );
 925         OffsetRgn( hrgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 926                          wndPtr->rectWindow.top - wndPtr->rectClient.top );
 927     }
 928     if (erase) RedrawWindow( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
 929 END:
 930     WIN_ReleaseWndPtr(wndPtr);
 931     return retval;
 932 }
 933
 934
 935 /***********************************************************************
 936  *              ExcludeUpdateRgn (USER32.@)
 937  */
 938 INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd )
 939 {
 940     RECT rect;
 941     WND * wndPtr;
 942
 943     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return ERROR;
 944
 945     if (wndPtr->hrgnUpdate)
 946     {
 947         INT ret;
 948         HRGN hrgn = CreateRectRgn(wndPtr->rectWindow.left - wndPtr->rectClient.left,
 949                                       wndPtr->rectWindow.top - wndPtr->rectClient.top,
 950                                       wndPtr->rectWindow.right - wndPtr->rectClient.left,
 951                                       wndPtr->rectWindow.bottom - wndPtr->rectClient.top);
 952         if( wndPtr->hrgnUpdate > 1 )
 953         {
 954             CombineRgn(hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY);
 955             OffsetRgn(hrgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 956                             wndPtr->rectWindow.top - wndPtr->rectClient.top );
 957         }
 958
 959         /* do ugly coordinate translations in dce.c */
 960
 961         ret = DCE_ExcludeRgn( hdc, hwnd, hrgn );
 962         DeleteObject( hrgn );
 963         WIN_ReleaseWndPtr(wndPtr);
 964         return ret;
 965     }
 966     WIN_ReleaseWndPtr(wndPtr);
 967     return GetClipBox( hdc, &rect );
 968 }
 969
 970
 971
 972 /***********************************************************************
 973  *              FillRect (USER.81)
 974  * NOTE
 975  *   The Win16 variant doesn't support special color brushes like
 976  *   the Win32 one, despite the fact that Win16, as well as Win32,
 977  *   supports special background brushes for a window class.
 978  */
 979 INT16 WINAPI FillRect16( HDC16 hdc, const RECT16 *rect, HBRUSH16 hbrush )
 980 {
 981     HBRUSH prevBrush;
 982
 983     /* coordinates are logical so we cannot fast-check 'rect',
 984      * it will be done later in the PatBlt().
 985      */
 986
 987     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
 988     PatBlt( hdc, rect->left, rect->top,
 989               rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
 990     SelectObject( hdc, prevBrush );
 991     return 1;
 992 }
 993
 994
 995 /***********************************************************************
 996  *              FillRect (USER32.@)
 997  */
 998 INT WINAPI FillRect( HDC hdc, const RECT *rect, HBRUSH hbrush )
 999 {
1000     HBRUSH prevBrush;
1001
1002     if (hbrush <= (HBRUSH) (COLOR_MAX + 1)) {
1003         hbrush = GetSysColorBrush( (INT) hbrush - 1 );
1004     }
1005
1006     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
1007     PatBlt( hdc, rect->left, rect->top,
1008               rect->right - rect->left, rect->bottom - rect->top, PATCOPY );
1009     SelectObject( hdc, prevBrush );
1010     return 1;
1011 }
1012
1013
1014 /***********************************************************************
1015  *              InvertRect (USER.82)
1016  */
1017 void WINAPI InvertRect16( HDC16 hdc, const RECT16 *rect )
1018 {
1019     PatBlt( hdc, rect->left, rect->top,
1020               rect->right - rect->left, rect->bottom - rect->top, DSTINVERT );
1021 }
1022
1023
1024 /***********************************************************************
1025  *              InvertRect (USER32.@)
1026  */
1027 BOOL WINAPI InvertRect( HDC hdc, const RECT *rect )
1028 {
1029     return PatBlt( hdc, rect->left, rect->top,
1030                      rect->right - rect->left, rect->bottom - rect->top,
1031                      DSTINVERT );
1032 }
1033
1034
1035 /***********************************************************************
1036  *              FrameRect (USER32.@)
1037  */
1038 INT WINAPI FrameRect( HDC hdc, const RECT *rect, HBRUSH hbrush )
1039 {
1040     HBRUSH prevBrush;
1041     RECT r = *rect;
1042
1043     if ( (r.right <= r.left) || (r.bottom <= r.top) ) return 0;
1044     if (!(prevBrush = SelectObject( hdc, hbrush ))) return 0;
1045
1046     PatBlt( hdc, r.left, r.top, 1,
1047               r.bottom - r.top, PATCOPY );
1048     PatBlt( hdc, r.right - 1, r.top, 1,
1049               r.bottom - r.top, PATCOPY );
1050     PatBlt( hdc, r.left, r.top,
1051               r.right - r.left, 1, PATCOPY );
1052     PatBlt( hdc, r.left, r.bottom - 1,
1053               r.right - r.left, 1, PATCOPY );
1054
1055     SelectObject( hdc, prevBrush );
1056     return TRUE;
1057 }
1058
1059
1060 /***********************************************************************
1061  *              FrameRect (USER.83)
1062  */
1063 INT16 WINAPI FrameRect16( HDC16 hdc, const RECT16 *rect16, HBRUSH16 hbrush )
1064 {
1065     RECT rect;
1066     CONV_RECT16TO32( rect16, &rect );
1067     return FrameRect( hdc, &rect, hbrush );
1068 }
1069
1070
1071 /***********************************************************************
1072  *              DrawFocusRect (USER.466)
1073  */
1074 void WINAPI DrawFocusRect16( HDC16 hdc, const RECT16* rc )
1075 {
1076     RECT rect32;
1077     CONV_RECT16TO32( rc, &rect32 );
1078     DrawFocusRect( hdc, &rect32 );
1079 }
1080
1081
1082 /***********************************************************************
1083  *              DrawFocusRect (USER32.@)
1084  *
1085  * FIXME: PatBlt(PATINVERT) with background brush.
1086  */
1087 BOOL WINAPI DrawFocusRect( HDC hdc, const RECT* rc )
1088 {
1089     HBRUSH hOldBrush;
1090     HPEN hOldPen, hNewPen;
1091     INT oldDrawMode, oldBkMode;
1092
1093     hOldBrush = SelectObject(hdc, GetStockObject(NULL_BRUSH));
1094     hNewPen = CreatePen(PS_ALTERNATE, 1, GetSysColor(COLOR_WINDOWTEXT));
1095     hOldPen = SelectObject(hdc, hNewPen);
1096     oldDrawMode = SetROP2(hdc, R2_XORPEN);
1097     oldBkMode = SetBkMode(hdc, TRANSPARENT);
1098
1099     Rectangle(hdc, rc->left, rc->top, rc->right, rc->bottom);
1100
1101     SetBkMode(hdc, oldBkMode);
1102     SetROP2(hdc, oldDrawMode);
1103     SelectObject(hdc, hOldPen);
1104     DeleteObject(hNewPen);
1105     SelectObject(hdc, hOldBrush);
1106
1107     return TRUE;
1108 }
1109
1110
1111 /**********************************************************************
1112  *              DrawAnimatedRects (USER32.@)
1113  */
1114 BOOL WINAPI DrawAnimatedRects( HWND hwnd, INT idAni,
1115                                    const RECT* lprcFrom,
1116                                    const RECT* lprcTo )
1117 {
1118     FIXME_(win)("(0x%x,%d,%p,%p): stub\n",hwnd,idAni,lprcFrom,lprcTo);
1119     return TRUE;
1120 }
1121
1122
1123 /**********************************************************************
1124  *          PAINTING_DrawStateJam
1125  *
1126  * Jams in the requested type in the dc
1127  */
1128 static BOOL PAINTING_DrawStateJam(HDC hdc, UINT opcode,
1129                                   DRAWSTATEPROC func, LPARAM lp, WPARAM wp,
1130                                   LPRECT rc, UINT dtflags, BOOL unicode )
1131 {
1132     HDC memdc;
1133     HBITMAP hbmsave;
1134     BOOL retval;
1135     INT cx = rc->right - rc->left;
1136     INT cy = rc->bottom - rc->top;
1137
1138     switch(opcode)
1139     {
1140     case DST_TEXT:
1141     case DST_PREFIXTEXT:
1142         if(unicode)
1143             return DrawTextW(hdc, (LPWSTR)lp, (INT)wp, rc, dtflags);
1144         else
1145             return DrawTextA(hdc, (LPSTR)lp, (INT)wp, rc, dtflags);
1146
1147     case DST_ICON:
1148         return DrawIcon(hdc, rc->left, rc->top, (HICON)lp);
1149
1150     case DST_BITMAP:
1151         memdc = CreateCompatibleDC(hdc);
1152         if(!memdc) return FALSE;
1153         hbmsave = (HBITMAP)SelectObject(memdc, (HBITMAP)lp);
1154         if(!hbmsave)
1155         {
1156             DeleteDC(memdc);
1157             return FALSE;
1158         }
1159         retval = BitBlt(hdc, rc->left, rc->top, cx, cy, memdc, 0, 0, SRCCOPY);
1160         SelectObject(memdc, hbmsave);
1161         DeleteDC(memdc);
1162         return retval;
1163
1164     case DST_COMPLEX:
1165         if(func) {
1166             BOOL bRet;
1167             /* DRAWSTATEPROC assumes that it draws at the center of coordinates  */
1168
1169             OffsetViewportOrgEx(hdc, rc->left, rc->top, NULL);
1170             bRet = func(hdc, lp, wp, cx, cy);
1171             /* Restore origin */
1172             OffsetViewportOrgEx(hdc, -rc->left, -rc->top, NULL);
1173             return bRet;
1174         } else
1175             return FALSE;
1176     }
1177     return FALSE;
1178 }
1179
1180 /**********************************************************************
1181  *      PAINTING_DrawState()
1182  */
1183 static BOOL PAINTING_DrawState(HDC hdc, HBRUSH hbr, DRAWSTATEPROC func, LPARAM lp, WPARAM wp,
1184                                INT x, INT y, INT cx, INT cy, UINT flags, BOOL unicode )
1185 {
1186     HBITMAP hbm, hbmsave;
1187     HFONT hfsave;
1188     HBRUSH hbsave, hbrtmp = 0;
1189     HDC memdc;
1190     RECT rc;
1191     UINT dtflags = DT_NOCLIP;
1192     COLORREF fg, bg;
1193     UINT opcode = flags & 0xf;
1194     INT len = wp;
1195     BOOL retval, tmp;
1196
1197     if((opcode == DST_TEXT || opcode == DST_PREFIXTEXT) && !len)    /* The string is '\0' terminated */
1198     {
1199         if(unicode)
1200             len = strlenW((LPWSTR)lp);
1201         else
1202             len = strlen((LPSTR)lp);
1203     }
1204
1205     /* Find out what size the image has if not given by caller */
1206     if(!cx || !cy)
1207     {
1208         SIZE s;
1209         CURSORICONINFO *ici;
1210         BITMAP bm;
1211
1212         switch(opcode)
1213         {
1214         case DST_TEXT:
1215         case DST_PREFIXTEXT:
1216             if(unicode)
1217                 retval = GetTextExtentPoint32W(hdc, (LPWSTR)lp, len, &s);
1218             else
1219                 retval = GetTextExtentPoint32A(hdc, (LPSTR)lp, len, &s);
1220             if(!retval) return FALSE;
1221             break;
1222
1223         case DST_ICON:
1224             ici = (CURSORICONINFO *)GlobalLock16((HGLOBAL16)lp);
1225             if(!ici) return FALSE;
1226             s.cx = ici->nWidth;
1227             s.cy = ici->nHeight;
1228             GlobalUnlock16((HGLOBAL16)lp);
1229             break;
1230
1231         case DST_BITMAP:
1232             if(!GetObjectA((HBITMAP)lp, sizeof(bm), &bm))
1233                 return FALSE;
1234             s.cx = bm.bmWidth;
1235             s.cy = bm.bmHeight;
1236             break;
1237
1238         case DST_COMPLEX: /* cx and cy must be set in this mode */
1239             return FALSE;
1240         }
1241
1242         if(!cx) cx = s.cx;
1243         if(!cy) cy = s.cy;
1244     }
1245
1246     rc.left   = x;
1247     rc.top    = y;
1248     rc.right  = x + cx;
1249     rc.bottom = y + cy;
1250
1251     if(flags & DSS_RIGHT)    /* This one is not documented in the win32.hlp file */
1252         dtflags |= DT_RIGHT;
1253     if(opcode == DST_TEXT)
1254         dtflags |= DT_NOPREFIX;
1255
1256     /* For DSS_NORMAL we just jam in the image and return */
1257     if((flags & 0x7ff0) == DSS_NORMAL)
1258     {
1259         return PAINTING_DrawStateJam(hdc, opcode, func, lp, len, &rc, dtflags, unicode);
1260     }
1261
1262     /* For all other states we need to convert the image to B/W in a local bitmap */
1263     /* before it is displayed */
1264     fg = SetTextColor(hdc, RGB(0, 0, 0));
1265     bg = SetBkColor(hdc, RGB(255, 255, 255));
1266     hbm = (HBITMAP)NULL; hbmsave = (HBITMAP)NULL;
1267     memdc = (HDC)NULL; hbsave = (HBRUSH)NULL;
1268     retval = FALSE; /* assume failure */
1269
1270     /* From here on we must use "goto cleanup" when something goes wrong */
1271     hbm     = CreateBitmap(cx, cy, 1, 1, NULL);
1272     if(!hbm) goto cleanup;
1273     memdc   = CreateCompatibleDC(hdc);
1274     if(!memdc) goto cleanup;
1275     hbmsave = (HBITMAP)SelectObject(memdc, hbm);
1276     if(!hbmsave) goto cleanup;
1277     rc.left = rc.top = 0;
1278     rc.right = cx;
1279     rc.bottom = cy;
1280     if(!FillRect(memdc, &rc, (HBRUSH)GetStockObject(WHITE_BRUSH))) goto cleanup;
1281     SetBkColor(memdc, RGB(255, 255, 255));
1282     SetTextColor(memdc, RGB(0, 0, 0));
1283     hfsave  = (HFONT)SelectObject(memdc, GetCurrentObject(hdc, OBJ_FONT));
1284
1285     /* DST_COMPLEX may draw text as well,
1286      * so we must be sure that correct font is selected
1287      */
1288     if(!hfsave && (opcode <= DST_PREFIXTEXT)) goto cleanup;
1289     tmp = PAINTING_DrawStateJam(memdc, opcode, func, lp, len, &rc, dtflags, unicode);
1290     if(hfsave) SelectObject(memdc, hfsave);
1291     if(!tmp) goto cleanup;
1292
1293     /* This state cause the image to be dithered */
1294     if(flags & DSS_UNION)
1295     {
1296         hbsave = (HBRUSH)SelectObject(memdc, CACHE_GetPattern55AABrush());
1297         if(!hbsave) goto cleanup;
1298         tmp = PatBlt(memdc, 0, 0, cx, cy, 0x00FA0089);
1299         SelectObject(memdc, hbsave);
1300         if(!tmp) goto cleanup;
1301     }
1302
1303     if (flags & DSS_DISABLED)
1304        hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DHILIGHT));
1305     else if (flags & DSS_DEFAULT)
1306        hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DSHADOW));
1307
1308     /* Draw light or dark shadow */
1309     if (flags & (DSS_DISABLED|DSS_DEFAULT))
1310     {
1311        if(!hbrtmp) goto cleanup;
1312        hbsave = (HBRUSH)SelectObject(hdc, hbrtmp);
1313        if(!hbsave) goto cleanup;
1314        if(!BitBlt(hdc, x+1, y+1, cx, cy, memdc, 0, 0, 0x00B8074A)) goto cleanup;
1315        SelectObject(hdc, hbsave);
1316        DeleteObject(hbrtmp);
1317        hbrtmp = 0;
1318     }
1319
1320     if (flags & DSS_DISABLED)
1321     {
1322        hbr = hbrtmp = CreateSolidBrush(GetSysColor(COLOR_3DSHADOW));
1323        if(!hbrtmp) goto cleanup;
1324     }
1325     else if (!hbr)
1326     {
1327        hbr = (HBRUSH)GetStockObject(BLACK_BRUSH);
1328     }
1329
1330     hbsave = (HBRUSH)SelectObject(hdc, hbr);
1331
1332     if(!BitBlt(hdc, x, y, cx, cy, memdc, 0, 0, 0x00B8074A)) goto cleanup;
1333
1334     retval = TRUE; /* We succeeded */
1335
1336 cleanup:
1337     SetTextColor(hdc, fg);
1338     SetBkColor(hdc, bg);
1339
1340     if(hbsave)  SelectObject(hdc, hbsave);
1341     if(hbmsave) SelectObject(memdc, hbmsave);
1342     if(hbrtmp)  DeleteObject(hbrtmp);
1343     if(hbm)     DeleteObject(hbm);
1344     if(memdc)   DeleteDC(memdc);
1345
1346     return retval;
1347 }
1348
1349 /**********************************************************************
1350  *              DrawStateA (USER32.@)
1351  */
1352 BOOL WINAPI DrawStateA(HDC hdc, HBRUSH hbr,
1353                    DRAWSTATEPROC func, LPARAM ldata, WPARAM wdata,
1354                    INT x, INT y, INT cx, INT cy, UINT flags)
1355 {
1356     return PAINTING_DrawState(hdc, hbr, func, ldata, wdata, x, y, cx, cy, flags, FALSE);
1357 }
1358
1359 /**********************************************************************
1360  *              DrawStateW (USER32.@)
1361  */
1362 BOOL WINAPI DrawStateW(HDC hdc, HBRUSH hbr,
1363                    DRAWSTATEPROC func, LPARAM ldata, WPARAM wdata,
1364                    INT x, INT y, INT cx, INT cy, UINT flags)
1365 {
1366     return PAINTING_DrawState(hdc, hbr, func, ldata, wdata, x, y, cx, cy, flags, TRUE);
1367 }
1368
1369
1370 /**********************************************************************
1371  *           DrawState    (USER.449)
1372  */
1373 BOOL16 WINAPI DrawState16( HDC16 hdc, HBRUSH16 hbr, DRAWSTATEPROC16 func, LPARAM ldata,
1374                            WPARAM16 wdata, INT16 x, INT16 y, INT16 cx, INT16 cy, UINT16 flags )
1375 {
1376     struct draw_state_info info;
1377     UINT opcode = flags & 0xf;
1378
1379     if (opcode == DST_TEXT || opcode == DST_PREFIXTEXT)
1380     {
1381         /* make sure DrawStateA doesn't try to use ldata as a pointer */
1382         if (!wdata) wdata = strlen( MapSL(ldata) );
1383         if (!cx || !cy)
1384         {
1385             SIZE s;
1386             if (!GetTextExtentPoint32A( hdc, MapSL(ldata), wdata, &s )) return FALSE;
1387             if (!cx) cx = s.cx;
1388             if (!cy) cy = s.cy;
1389         }
1390     }
1391     info.proc  = func;
1392     info.param = ldata;
1393     return DrawStateA( hdc, hbr, draw_state_callback, (LPARAM)&info, wdata, x, y, cx, cy, flags );
1394 }
1395
1396
1397 /***********************************************************************
1398  *              SelectPalette (USER.282)
1399  */
1400 HPALETTE16 WINAPI SelectPalette16( HDC16 hDC, HPALETTE16 hPal,
1401                                    BOOL16 bForceBackground )
1402 {
1403     WORD wBkgPalette = 1;
1404
1405     if (!bForceBackground && (hPal != GetStockObject(DEFAULT_PALETTE)))
1406     {
1407         HWND hwnd = WindowFromDC( hDC );
1408         if (hwnd)
1409         {
1410             HWND hForeground = GetForegroundWindow();
1411             /* set primary palette if it's related to current active */
1412             if (hForeground == hwnd || IsChild(hForeground,hwnd)) wBkgPalette = 0;
1413         }
1414     }
1415     return GDISelectPalette16( hDC, hPal, wBkgPalette);
1416 }
1417
1418
1419 /***********************************************************************
1420  *              RealizePalette (USER.283)
1421  */
1422 UINT16 WINAPI RealizePalette16( HDC16 hDC )
1423 {
1424     UINT16 realized = GDIRealizePalette16( hDC );
1425
1426     /* do not send anything if no colors were changed */
1427     if (realized && IsDCCurrentPalette16( hDC ))
1428     {
1429         /* send palette change notification */
1430         HWND hWnd = WindowFromDC( hDC );
1431         if (hWnd) SendMessageA( HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0L);
1432     }
1433     return realized;
1434 }
1435
1436
1437 /***********************************************************************
1438  *              UserRealizePalette (USER32.@)
1439  */
1440 UINT WINAPI UserRealizePalette( HDC hDC )
1441 {
1442     return RealizePalette16( hDC );
1443 }