Sweden-Number/dlls/wineps.drv/clipping.c

116 lines
3.7 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "psdrv.h"
#include "wine/debug.h"
#include "winbase.h"
WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
/***********************************************************************
* PSDRV_AddClip
*/
void PSDRV_AddClip( PHYSDEV dev, HRGN hrgn )
{
CHAR szArrayName[] = "clippath";
RECT *rect;
RGNDATA *data;
DWORD i, size = GetRegionData(hrgn, 0, NULL);
if (!size) return;
if (!(data = HeapAlloc( GetProcessHeap(), 0, size ))) return;
GetRegionData( hrgn, size, data );
rect = (RECT *)data->Buffer;
switch (data->rdh.nCount)
{
case 0:
/* set an empty clip path. */
PSDRV_WriteRectClip(dev, 0, 0, 0, 0);
break;
case 1:
/* optimize when it is a simple region */
PSDRV_WriteRectClip(dev, rect->left, rect->top,
rect->right - rect->left, rect->bottom - rect->top);
break;
default:
PSDRV_WriteArrayDef(dev, szArrayName, data->rdh.nCount * 4);
for (i = 0; i < data->rdh.nCount; i++, rect++)
{
PSDRV_WriteArrayPut(dev, szArrayName, i * 4, rect->left);
PSDRV_WriteArrayPut(dev, szArrayName, i * 4 + 1, rect->top);
PSDRV_WriteArrayPut(dev, szArrayName, i * 4 + 2, rect->right - rect->left);
PSDRV_WriteArrayPut(dev, szArrayName, i * 4 + 3, rect->bottom - rect->top);
}
PSDRV_WriteRectClip2(dev, szArrayName);
break;
}
HeapFree( GetProcessHeap(), 0, data );
}
/***********************************************************************
* PSDRV_SetClip
*
* The idea here is that every graphics operation should bracket
* output in PSDRV_SetClip/ResetClip calls. The clip path outside
* these calls will be empty; the reason for this is that it is
* impossible in PostScript to cleanly make the clip path larger than
* the current one. Also Photoshop assumes that despite having set a
* small clip area in the printer dc that it can still write raw
* PostScript to the driver and expect this code not to be clipped.
*/
void PSDRV_SetClip( PHYSDEV dev )
{
PSDRV_PDEVICE *physDev = get_psdrv_dev( dev );
HRGN hrgn;
TRACE("hdc=%p\n", dev->hdc);
if(physDev->pathdepth) {
TRACE("inside a path, so not clipping\n");
return;
}
hrgn = CreateRectRgn(0, 0, 0, 0);
if (GetRandomRgn(dev->hdc, hrgn, 3) == 1) /* clip && meta */
{
PSDRV_WriteGSave(dev);
PSDRV_AddClip( dev, hrgn );
}
DeleteObject(hrgn);
}
/***********************************************************************
* PSDRV_ResetClip
*/
void PSDRV_ResetClip( PHYSDEV dev )
{
PSDRV_PDEVICE *physDev = get_psdrv_dev( dev );
HRGN hrgn;
if (physDev->pathdepth) return;
hrgn = CreateRectRgn(0, 0, 0, 0);
if (GetRandomRgn(dev->hdc, hrgn, 3) == 1) /* clip && meta */
PSDRV_WriteGRestore(dev);
DeleteObject(hrgn);
}