2 * PostScript clipping functions
4 * Copyright 1999 Luc Tourangau
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/debug.h"
25 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
27 /***********************************************************************
30 * The idea here is that every graphics operation should bracket
31 * output in PSDRV_SetClip/ResetClip calls. The clip path outside
32 * these calls will be empty; the reason for this is that it is
33 * impossible in PostScript to cleanly make the clip path larger than
34 * the current one. Also Photoshop assumes that despite having set a
35 * small clip area in the printer dc that it can still write raw
36 * PostScript to the driver and expect this code not to be clipped.
38 void PSDRV_SetClip( PHYSDEV dev )
40 PSDRV_PDEVICE *physDev = get_psdrv_dev( dev );
41 CHAR szArrayName[] = "clippath";
43 RGNDATA *rgndata = NULL;
44 HRGN hrgn = CreateRectRgn(0,0,0,0);
47 TRACE("hdc=%p\n", dev->hdc);
49 if(physDev->pathdepth) {
50 TRACE("inside a path, so not clipping\n");
54 empty = !GetClipRgn(dev->hdc, hrgn);
57 size = GetRegionData(hrgn, 0, NULL);
59 ERR("Invalid region\n");
63 rgndata = HeapAlloc( GetProcessHeap(), 0, size );
65 ERR("Can't allocate buffer\n");
69 GetRegionData(hrgn, size, rgndata);
71 PSDRV_WriteGSave(dev);
73 /* check for NULL region */
74 if (rgndata->rdh.nCount == 0)
76 /* set an empty clip path. */
77 PSDRV_WriteRectClip(dev, 0, 0, 0, 0);
79 /* optimize when it is a simple region */
80 else if (rgndata->rdh.nCount == 1)
82 RECT *pRect = (RECT *)rgndata->Buffer;
84 PSDRV_WriteRectClip(dev, pRect->left, pRect->top,
85 pRect->right - pRect->left,
86 pRect->bottom - pRect->top);
91 RECT *pRect = (RECT *)rgndata->Buffer;
93 PSDRV_WriteArrayDef(dev, szArrayName, rgndata->rdh.nCount * 4);
95 for (i = 0; i < rgndata->rdh.nCount; i++, pRect++)
97 PSDRV_WriteArrayPut(dev, szArrayName, i * 4,
99 PSDRV_WriteArrayPut(dev, szArrayName, i * 4 + 1,
101 PSDRV_WriteArrayPut(dev, szArrayName, i * 4 + 2,
102 pRect->right - pRect->left);
103 PSDRV_WriteArrayPut(dev, szArrayName, i * 4 + 3,
104 pRect->bottom - pRect->top);
106 PSDRV_WriteRectClip2(dev, szArrayName);
110 HeapFree( GetProcessHeap(), 0, rgndata );
115 /***********************************************************************
118 void PSDRV_ResetClip( PHYSDEV dev )
120 PSDRV_PDEVICE *physDev = get_psdrv_dev( dev );
121 HRGN hrgn = CreateRectRgn(0,0,0,0);
124 empty = !GetClipRgn(dev->hdc, hrgn);
125 if(!empty && !physDev->pathdepth)
126 PSDRV_WriteGRestore(dev);