windows/painting.c

   1 /*
   2  * Window painting functions
   3  *
   4  * Copyright 1993, 1994, 1995 Alexandre Julliard
   5  */
   6
   7 #include <stdio.h>
   8 #include <X11/Xlib.h>
   9
  10 #include "win.h"
  11 #include "message.h"
  12 #include "gdi.h"
  13 #include "stddebug.h"
  14 /* #define DEBUG_WIN */
  15 #include "debug.h"
  16
  17   /* Last CTLCOLOR id */
  18 #define CTLCOLOR_MAX   CTLCOLOR_STATIC
  19
  20
  21 /***********************************************************************
  22  *           BeginPaint    (USER.39)
  23  */
  24 HDC BeginPaint( HWND hwnd, LPPAINTSTRUCT lps )
  25 {
  26     HRGN hrgnUpdate;
  27     WND * wndPtr = WIN_FindWndPtr( hwnd );
  28     if (!wndPtr) return 0;
  29
  30     hrgnUpdate = wndPtr->hrgnUpdate;  /* Save update region */
  31     if (!hrgnUpdate)    /* Create an empty region */
  32         if (!(hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 ))) return 0;
  33
  34     if (wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT))
  35         MSG_DecPaintCount( wndPtr->hmemTaskQ );
  36
  37     wndPtr->hrgnUpdate = 0;
  38     wndPtr->flags &= ~(WIN_NEEDS_BEGINPAINT | WIN_INTERNAL_PAINT);
  39
  40     if (wndPtr->flags & WIN_NEEDS_NCPAINT)
  41     {
  42         wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
  43         SendMessage( hwnd, WM_NCPAINT, 0, 0 );
  44     }
  45
  46     lps->hdc = GetDCEx( hwnd, hrgnUpdate, DCX_INTERSECTRGN | DCX_USESTYLE );
  47     DeleteObject( hrgnUpdate );
  48     if (!lps->hdc)
  49     {
  50         fprintf( stderr, "GetDCEx() failed in BeginPaint(), hwnd="NPFMT"\n", hwnd );
  51         return 0;
  52     }
  53
  54     GetRgnBox( InquireVisRgn(lps->hdc), &lps->rcPaint );
  55     DPtoLP( lps->hdc, (LPPOINT)&lps->rcPaint, 2 );
  56
  57     if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
  58     {
  59         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
  60         lps->fErase = !SendMessage( hwnd, WM_ERASEBKGND, (WPARAM)lps->hdc, 0 );
  61     }
  62     else lps->fErase = TRUE;
  63
  64     return lps->hdc;
  65 }
  66
  67
  68 /***********************************************************************
  69  *           EndPaint    (USER.40)
  70  */
  71 void EndPaint( HWND hwnd, LPPAINTSTRUCT lps )
  72 {
  73     ReleaseDC( hwnd, lps->hdc );
  74 }
  75
  76
  77 /***********************************************************************
  78  *           FillWindow    (USER.324)
  79  */
  80 void FillWindow( HWND hwndParent, HWND hwnd, HDC hdc, HBRUSH hbrush )
  81 {
  82     RECT rect;
  83     GetClientRect( hwnd, &rect );
  84     DPtoLP( hdc, (LPPOINT)&rect, 2 );
  85     PaintRect( hwndParent, hwnd, hdc, hbrush, &rect );
  86 }
  87
  88
  89 /***********************************************************************
  90  *           PaintRect    (USER.325)
  91  */
  92 void PaintRect(HWND hwndParent, HWND hwnd, HDC hdc, HBRUSH hbrush, LPRECT rect)
  93 {
  94       /* Send WM_CTLCOLOR message if needed */
  95
  96     if ((DWORD)hbrush <= CTLCOLOR_MAX)
  97     {
  98         if (!hwndParent) return;
  99 #ifdef WINELIB32
 100         hbrush = (HBRUSH)SendMessage( hwndParent,
 101                                       WM_CTLCOLORMSGBOX+(DWORD)hbrush,
 102                                       (WPARAM)hdc, (LPARAM)hwnd );
 103 #else
 104         hbrush = (HBRUSH)SendMessage( hwndParent, WM_CTLCOLOR,
 105                                       hdc, MAKELONG( hwnd, hbrush ) );
 106 #endif
 107     }
 108     if (hbrush) FillRect( hdc, rect, hbrush );
 109 }
 110
 111
 112 /***********************************************************************
 113  *           GetControlBrush    (USER.326)
 114  */
 115 HBRUSH GetControlBrush( HWND hwnd, HDC hdc, WORD control )
 116 {
 117 #ifdef WINELIB32
 118     return (HBRUSH)SendMessage( GetParent(hwnd), WM_CTLCOLOR+control,
 119                                 (WPARAM)hdc, (LPARAM)hwnd );
 120 #else
 121     return (HBRUSH)SendMessage( GetParent(hwnd), WM_CTLCOLOR,
 122                                 hdc, MAKELONG( hwnd, control ) );
 123 #endif
 124 }
 125
 126
 127 /***********************************************************************
 128  *           RedrawWindow    (USER.290)
 129  */
 130 BOOL RedrawWindow( HWND hwnd, LPRECT rectUpdate, HRGN hrgnUpdate, UINT flags )
 131 {
 132     HRGN tmpRgn, hrgn;
 133     RECT rectClient;
 134     WND * wndPtr;
 135
 136     if (!hwnd) hwnd = GetDesktopWindow();
 137     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 138     if (!IsWindowVisible(hwnd) || (wndPtr->flags & WIN_NO_REDRAW))
 139         return TRUE;  /* No redraw needed */
 140
 141     if (rectUpdate)
 142     {
 143         dprintf_win( stddeb, "RedrawWindow: "NPFMT" %ld,%ld-%ld,%ld "NPFMT" flags=%04x\n",
 144                      hwnd, (LONG)rectUpdate->left, (LONG)rectUpdate->top,
 145                      (LONG)rectUpdate->right, (LONG)rectUpdate->bottom, hrgnUpdate, flags);
 146     }
 147     else
 148     {
 149         dprintf_win( stddeb, "RedrawWindow: "NPFMT" NULL "NPFMT" flags=%04x\n",
 150                      hwnd, hrgnUpdate, flags);
 151     }
 152     GetClientRect( hwnd, &rectClient );
 153
 154     if (flags & RDW_INVALIDATE)  /* Invalidate */
 155     {
 156         if (wndPtr->hrgnUpdate)  /* Is there already an update region? */
 157         {
 158             tmpRgn = CreateRectRgn( 0, 0, 0, 0 );
 159             if ((hrgn = hrgnUpdate) == 0)
 160                 hrgn = CreateRectRgnIndirect( rectUpdate ? rectUpdate :
 161                                               &rectClient );
 162             CombineRgn( tmpRgn, wndPtr->hrgnUpdate, hrgn, RGN_OR );
 163             DeleteObject( wndPtr->hrgnUpdate );
 164             wndPtr->hrgnUpdate = tmpRgn;
 165             if (!hrgnUpdate) DeleteObject( hrgn );
 166         }
 167         else  /* No update region yet */
 168         {
 169             if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 170                 MSG_IncPaintCount( wndPtr->hmemTaskQ );
 171             if (hrgnUpdate)
 172             {
 173                 wndPtr->hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
 174                 CombineRgn( wndPtr->hrgnUpdate, hrgnUpdate, 0, RGN_COPY );
 175             }
 176             else wndPtr->hrgnUpdate = CreateRectRgnIndirect( rectUpdate ?
 177                                                     rectUpdate : &rectClient );
 178         }
 179         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 180         if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 181         flags |= RDW_FRAME;  /* Force invalidating the frame of children */
 182     }
 183     else if (flags & RDW_VALIDATE)  /* Validate */
 184     {
 185           /* We need an update region in order to validate anything */
 186         if (wndPtr->hrgnUpdate)
 187         {
 188             if (!hrgnUpdate && !rectUpdate)
 189             {
 190                   /* Special case: validate everything */
 191                 DeleteObject( wndPtr->hrgnUpdate );
 192                 wndPtr->hrgnUpdate = 0;
 193             }
 194             else
 195             {
 196                 tmpRgn = CreateRectRgn( 0, 0, 0, 0 );
 197                 if ((hrgn = hrgnUpdate) == 0)
 198                     hrgn = CreateRectRgnIndirect( rectUpdate );
 199                 if (CombineRgn( tmpRgn, wndPtr->hrgnUpdate,
 200                                 hrgn, RGN_DIFF ) == NULLREGION)
 201                 {
 202                     DeleteObject( tmpRgn );
 203                     tmpRgn = 0;
 204                 }
 205                 DeleteObject( wndPtr->hrgnUpdate );
 206                 wndPtr->hrgnUpdate = tmpRgn;
 207                 if (!hrgnUpdate) DeleteObject( hrgn );
 208             }
 209             if (!wndPtr->hrgnUpdate)  /* No more update region */
 210                 if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 211                     MSG_DecPaintCount( wndPtr->hmemTaskQ );
 212         }
 213         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 214         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 215     }
 216
 217       /* Set/clear internal paint flag */
 218
 219     if (flags & RDW_INTERNALPAINT)
 220     {
 221         if (!wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 222             MSG_IncPaintCount( wndPtr->hmemTaskQ );
 223         wndPtr->flags |= WIN_INTERNAL_PAINT;
 224     }
 225     else if (flags & RDW_NOINTERNALPAINT)
 226     {
 227         if (!wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
 228             MSG_DecPaintCount( wndPtr->hmemTaskQ );
 229         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 230     }
 231
 232       /* Erase/update window */
 233
 234     if (flags & RDW_UPDATENOW) SendMessage( hwnd, WM_PAINT, 0, 0 );
 235     else if (flags & RDW_ERASENOW)
 236     {
 237         if (wndPtr->flags & WIN_NEEDS_NCPAINT)
 238         {
 239             wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 240             SendMessage( hwnd, WM_NCPAINT, 0, 0 );
 241         }
 242         if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
 243         {
 244             HDC hdc = GetDCEx( hwnd, wndPtr->hrgnUpdate,
 245                                DCX_INTERSECTRGN | DCX_USESTYLE );
 246             if (hdc)
 247             {
 248               /* Don't send WM_ERASEBKGND to icons */
 249               /* (WM_ICONERASEBKGND is sent during processing of WM_NCPAINT) */
 250                 if (!(wndPtr->dwStyle & WS_MINIMIZE)
 251                     || !WIN_CLASS_INFO(wndPtr).hIcon)
 252                 {
 253                     if (SendMessage( hwnd, WM_ERASEBKGND, (WPARAM)hdc, 0 ))
 254                         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 255                 }
 256                 ReleaseDC( hwnd, hdc );
 257             }
 258         }
 259     }
 260
 261       /* Recursively process children */
 262
 263     if (!(flags & RDW_NOCHILDREN) &&
 264         ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)))
 265     {
 266         if (hrgnUpdate)
 267         {
 268             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
 269             if (!hrgn) return TRUE;
 270             for (hwnd = wndPtr->hwndChild; (hwnd); hwnd = wndPtr->hwndNext)
 271             {
 272                 if (!(wndPtr = WIN_FindWndPtr( hwnd ))) break;
 273                 CombineRgn( hrgn, hrgnUpdate, 0, RGN_COPY );
 274                 OffsetRgn( hrgn, -wndPtr->rectClient.left,
 275                                  -wndPtr->rectClient.top );
 276                 RedrawWindow( hwnd, NULL, hrgn, flags );
 277             }
 278             DeleteObject( hrgn );
 279         }
 280         else
 281         {
 282             RECT rect;
 283             for (hwnd = wndPtr->hwndChild; (hwnd); hwnd = wndPtr->hwndNext)
 284             {
 285                 if (!(wndPtr = WIN_FindWndPtr( hwnd ))) break;
 286                 if (rectUpdate)
 287                 {
 288                     rect = *rectUpdate;
 289                     OffsetRect( &rect, -wndPtr->rectClient.left,
 290                                        -wndPtr->rectClient.top );
 291                     RedrawWindow( hwnd, &rect, 0, flags );
 292                 }
 293                 else RedrawWindow( hwnd, NULL, 0, flags );
 294             }
 295         }
 296     }
 297     return TRUE;
 298 }
 299
 300
 301 /***********************************************************************
 302  *           UpdateWindow   (USER.124)
 303  */
 304 void UpdateWindow( HWND hwnd )
 305 {
 306     RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_NOCHILDREN );
 307 }
 308
 309
 310 /***********************************************************************
 311  *           InvalidateRgn   (USER.126)
 312  */
 313 void InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 314 {
 315     RedrawWindow( hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 316 }
 317
 318
 319 /***********************************************************************
 320  *           InvalidateRect   (USER.125)
 321  */
 322 void InvalidateRect( HWND hwnd, LPRECT rect, BOOL erase )
 323 {
 324     RedrawWindow( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 325 }
 326
 327
 328 /***********************************************************************
 329  *           ValidateRgn   (USER.128)
 330  */
 331 void ValidateRgn( HWND hwnd, HRGN hrgn )
 332 {
 333     RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
 334 }
 335
 336
 337 /***********************************************************************
 338  *           ValidateRect   (USER.127)
 339  */
 340 void ValidateRect( HWND hwnd, LPRECT rect )
 341 {
 342     RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 343 }
 344
 345
 346 /***********************************************************************
 347  *           GetUpdateRect   (USER.190)
 348  */
 349 BOOL GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
 350 {
 351     WND * wndPtr = WIN_FindWndPtr( hwnd );
 352     if (!wndPtr) return FALSE;
 353
 354     if (rect)
 355     {
 356         if (wndPtr->hrgnUpdate)
 357         {
 358             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
 359             if (GetUpdateRgn( hwnd, hrgn, erase ) == ERROR) return FALSE;
 360             GetRgnBox( hrgn, rect );
 361             DeleteObject( hrgn );
 362         }
 363         else SetRectEmpty( rect );
 364     }
 365     return (wndPtr->hrgnUpdate != 0);
 366 }
 367
 368
 369 /***********************************************************************
 370  *           GetUpdateRgn   (USER.237)
 371  */
 372 int GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
 373 {
 374     int retval;
 375     WND * wndPtr = WIN_FindWndPtr( hwnd );
 376     if (!wndPtr) return ERROR;
 377
 378     if (!wndPtr->hrgnUpdate)
 379     {
 380         SetRectRgn( hrgn, 0, 0, 0, 0 );
 381         return NULLREGION;
 382     }
 383     retval = CombineRgn( hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY );
 384     if (erase) RedrawWindow( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
 385     return retval;
 386 }
 387
 388
 389 /***********************************************************************
 390  *           ExcludeUpdateRgn   (USER.238)
 391  */
 392 int ExcludeUpdateRgn( HDC hdc, HWND hwnd )
 393 {
 394     int retval = ERROR;
 395     HRGN hrgn;
 396     WND * wndPtr;
 397
 398     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return ERROR;
 399     if ((hrgn = CreateRectRgn( 0, 0, 0, 0 )) != 0)
 400     {
 401         retval = CombineRgn( hrgn, InquireVisRgn(hdc),
 402                              wndPtr->hrgnUpdate, RGN_DIFF );
 403         if (retval) SelectVisRgn( hdc, hrgn );
 404         DeleteObject( hrgn );
 405     }
 406     return retval;
 407 }
 408
 409