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126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/*
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* X11DRV clipping functions
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*
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* Copyright 1998 Huw Davies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include <stdio.h>
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#include "x11drv.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(x11drv);
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/***********************************************************************
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* X11DRV_GetRegionData
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*
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* Calls GetRegionData on the given region and converts the rectangle
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* array to XRectangle format. The returned buffer must be freed by
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* caller using HeapFree(GetProcessHeap(),...).
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* If hdc_lptodp is not 0, the rectangles are converted through LPtoDP.
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*/
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RGNDATA *X11DRV_GetRegionData( HRGN hrgn, HDC hdc_lptodp )
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{
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RGNDATA *data;
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DWORD size;
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unsigned int i;
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RECT *rect, tmp;
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XRectangle *xrect;
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if (!(size = GetRegionData( hrgn, 0, NULL ))) return NULL;
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if (sizeof(XRectangle) > sizeof(RECT))
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{
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/* add extra size for XRectangle array */
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int count = (size - sizeof(RGNDATAHEADER)) / sizeof(RECT);
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size += count * (sizeof(XRectangle) - sizeof(RECT));
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}
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if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return NULL;
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if (!GetRegionData( hrgn, size, data ))
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{
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HeapFree( GetProcessHeap(), 0, data );
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return NULL;
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}
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rect = (RECT *)data->Buffer;
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xrect = (XRectangle *)data->Buffer;
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if (hdc_lptodp) /* map to device coordinates */
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{
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LPtoDP( hdc_lptodp, (POINT *)rect, data->rdh.nCount * 2 );
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for (i = 0; i < data->rdh.nCount; i++)
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{
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if (rect[i].right < rect[i].left)
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{
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INT tmp = rect[i].right;
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rect[i].right = rect[i].left;
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rect[i].left = tmp;
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}
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if (rect[i].bottom < rect[i].top)
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{
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INT tmp = rect[i].bottom;
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rect[i].bottom = rect[i].top;
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rect[i].top = tmp;
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}
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}
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}
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if (sizeof(XRectangle) > sizeof(RECT))
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{
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int j;
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/* need to start from the end */
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for (j = data->rdh.nCount-1; j >= 0; j--)
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{
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tmp = rect[j];
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xrect[j].x = tmp.left;
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xrect[j].y = tmp.top;
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xrect[j].width = tmp.right - tmp.left;
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xrect[j].height = tmp.bottom - tmp.top;
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}
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}
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else
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{
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for (i = 0; i < data->rdh.nCount; i++)
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{
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tmp = rect[i];
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xrect[i].x = tmp.left;
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xrect[i].y = tmp.top;
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xrect[i].width = tmp.right - tmp.left;
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xrect[i].height = tmp.bottom - tmp.top;
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}
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}
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return data;
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}
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/***********************************************************************
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* X11DRV_SetDeviceClipping
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*/
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void X11DRV_SetDeviceClipping( X11DRV_PDEVICE *physDev, HRGN vis_rgn, HRGN clip_rgn )
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{
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RGNDATA *data;
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CombineRgn( physDev->region, vis_rgn, clip_rgn, clip_rgn ? RGN_AND : RGN_COPY );
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if (!(data = X11DRV_GetRegionData( physDev->region, 0 ))) return;
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wine_tsx11_lock();
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XSetClipRectangles( gdi_display, physDev->gc, physDev->org.x, physDev->org.y,
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(XRectangle *)data->Buffer, data->rdh.nCount, YXBanded );
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wine_tsx11_unlock();
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HeapFree( GetProcessHeap(), 0, data );
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}
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