Sweden-Number/dlls/wineps/clipping.c

100 lines
3.2 KiB
C

/*
* PostScript clipping functions
*
* Copyright 1999 Luc Tourangau
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "psdrv.h"
#include "wine/debug.h"
#include "winbase.h"
WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
/***********************************************************************
* PSDRV_SetDeviceClipping
*/
VOID PSDRV_SetDeviceClipping( PSDRV_PDEVICE *physDev, HRGN ignored )
{
CHAR szArrayName[] = "clippath";
DWORD size;
RGNDATA *rgndata = NULL;
HRGN hrgn = CreateRectRgn(0,0,0,0);
BOOL empty;
TRACE("hdc=%p\n", physDev->hdc);
empty = !GetClipRgn(physDev->hdc, hrgn);
/* We really shouldn't be using initclip */
PSDRV_WriteInitClip(physDev);
if(!empty) {
size = GetRegionData(hrgn, 0, NULL);
if(!size) {
ERR("Invalid region\n");
goto end;
}
rgndata = HeapAlloc( GetProcessHeap(), 0, size );
if(!rgndata) {
ERR("Can't allocate buffer\n");
goto end;
}
GetRegionData(hrgn, size, rgndata);
/* check for NULL region */
if (rgndata->rdh.nCount == 0)
{
/* set an empty clip path. */
PSDRV_WriteRectClip(physDev, 0, 0, 0, 0);
}
/* optimize when it is a simple region */
else if (rgndata->rdh.nCount == 1)
{
RECT *pRect = (RECT *)rgndata->Buffer;
PSDRV_WriteRectClip(physDev, pRect->left, pRect->top,
pRect->right - pRect->left,
pRect->bottom - pRect->top);
}
else
{
INT i;
RECT *pRect = (RECT *)rgndata->Buffer;
PSDRV_WriteArrayDef(physDev, szArrayName, rgndata->rdh.nCount * 4);
for (i = 0; i < rgndata->rdh.nCount; i++, pRect++)
{
PSDRV_WriteArrayPut(physDev, szArrayName, i * 4,
pRect->left);
PSDRV_WriteArrayPut(physDev, szArrayName, i * 4 + 1,
pRect->top);
PSDRV_WriteArrayPut(physDev, szArrayName, i * 4 + 2,
pRect->right - pRect->left);
PSDRV_WriteArrayPut(physDev, szArrayName, i * 4 + 3,
pRect->bottom - pRect->top);
}
PSDRV_WriteRectClip2(physDev, szArrayName);
}
}
end:
if(rgndata) HeapFree( GetProcessHeap(), 0, rgndata );
DeleteObject(hrgn);
}