Sweden-Number/dlls/wineps/clipping.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 "gdi.h"
#include "psdrv.h"
#include "wine/debug.h"
#include "winbase.h"

WINE_DEFAULT_DEBUG_CHANNEL(psdrv);

/***********************************************************************
 *           PSDRV_SetDeviceClipping
 */
VOID PSDRV_SetDeviceClipping( PSDRV_PDEVICE *physDev )
{
    CHAR szArrayName[] = "clippath";
    DWORD size;
    RGNDATA *rgndata;
    DC *dc = physDev->dc;

    TRACE("hdc=%04x\n", physDev->hdc);

    if (dc->hGCClipRgn == 0) {
        ERR("Rgn is 0. Please report this.\n");
	return;
    }

    size = GetRegionData(dc->hGCClipRgn, 0, NULL);
    if(!size) {
        ERR("Invalid region\n");
	return;
    }

    rgndata = HeapAlloc( GetProcessHeap(), 0, size );
    if(!rgndata) {
        ERR("Can't allocate buffer\n");
	return;
    }

    GetRegionData(dc->hGCClipRgn, size, rgndata);

    PSDRV_WriteInitClip(physDev);

    /* 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);
    }
    
    HeapFree( GetProcessHeap(), 0, rgndata );
    return;
}