wine/dlls/winex11.drv/clipping.c

123 lines
3.8 KiB
C

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