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     if(physDev->hasDIB)
  40     {
  41         /* DIB section selected in, use DIB Engine */
  42
  43         CombineRgn( physDev->region, vis_rgn, clip_rgn, clip_rgn ? RGN_AND : RGN_COPY );
  44
  45         /* get region rectangles */
  46         if(!(size = GetRegionData(physDev->region, 0, NULL)))
  47             return;
  48         data = HeapAlloc(GetProcessHeap(), 0, size);
  49         if (!GetRegionData(physDev->region, size, data))
  50         {
  51             HeapFree( GetProcessHeap(), 0, data );
  52             return;
  53         }
  54
  55         /* frees any previous regions rectangles in DC */
  56         if(physDev->regionData)
  57             HeapFree(GetProcessHeap(), 0, physDev->regionData);
  58
  59         /* sets the rectangles on physDev */
  60         physDev->regionData = data;
  61         physDev->regionRects = (RECT *)data->Buffer;
  62         physDev->regionRectCount = data->rdh.nCount;
  63
  64         if(TRACE_ON(dibdrv))
  65         {
  66             TRACE("Region dump : %d rectangles\n", physDev->regionRectCount);
  67             for(iRect = 0; iRect < physDev->regionRectCount; iRect++)
  68             {
  69                 RECT *r = physDev->regionRects + iRect;
  70                 TRACE("Rect #%03d, x1:%4d, y1:%4d, x2:%4d, y2:%4d\n", iRect, r->left, r->top, r->right, r->bottom);
  71             }
  72         }
  73     }
  74     else
  75     {
  76         /* DDB selected in, use X11 driver */
  77         _DIBDRV_GetDisplayDriver()->pSetDeviceClipping(physDev->X11PhysDev, vis_rgn, clip_rgn);
  78     }
  79 }