dlls/winedib.drv/clipping.c

   1 /*
   2  * DIBDRV clipping functions
   3  *
   4  * Copyright 2009 Massimo Del Fedele
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include "dibdrv.h"
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(dibdrv);
  27
  28 /***********************************************************************
  29  *           DIBDRV_SetDeviceClipping
  30  */
  31 void DIBDRV_SetDeviceClipping( DIBDRVPHYSDEV *physDev, HRGN vis_rgn, HRGN clip_rgn )
  32 {
  33     RGNDATA *data;
  34     DWORD size;
  35     int iRect;
  36
  37     MAYBE(TRACE("physDev:%p, vis_rgn:%p, clip_rgn:%p\n", physDev, vis_rgn, clip_rgn));
  38
  39     /* sets the region for X11 driver anyways... we may change bitmap later on */
  40     _DIBDRV_GetDisplayDriver()->pSetDeviceClipping(physDev->X11PhysDev, vis_rgn, clip_rgn);
  41
  42     /* then we set the region for DIB engine, same reason */
  43
  44     CombineRgn( physDev->region, vis_rgn, clip_rgn, clip_rgn ? RGN_AND : RGN_COPY );
  45
  46     /* get region rectangles */
  47     if(!(size = GetRegionData(physDev->region, 0, NULL)))
  48         return;
  49     data = HeapAlloc(GetProcessHeap(), 0, size);
  50     if (!GetRegionData(physDev->region, size, data))
  51     {
  52         HeapFree( GetProcessHeap(), 0, data );
  53         return;
  54     }
  55
  56     /* frees any previous regions rectangles in DC */
  57     if(physDev->regionData)
  58         HeapFree(GetProcessHeap(), 0, physDev->regionData);
  59
  60     /* sets the rectangles on physDev */
  61     physDev->regionData = data;
  62     physDev->regionRects = (RECT *)data->Buffer;
  63     physDev->regionRectCount = data->rdh.nCount;
  64
  65     if(TRACE_ON(dibdrv))
  66     {
  67         TRACE("Region dump : %d rectangles\n", physDev->regionRectCount);
  68         for(iRect = 0; iRect < physDev->regionRectCount; iRect++)
  69         {
  70             RECT *r = physDev->regionRects + iRect;
  71             TRACE("Rect #%03d, x1:%4d, y1:%4d, x2:%4d, y2:%4d\n", iRect, r->left, r->top, r->right, r->bottom);
  72         }
  73     }
  74 }