DIB Engine: fix MapModes for xxxBlt
[wine/hacks.git] / dlls / wineps.drv / clipping.c
blobf201dd16191e8eee57471b805f4cf7d400dc36d9
1 /*
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
21 #include "psdrv.h"
22 #include "wine/debug.h"
23 #include "winbase.h"
25 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
27 /***********************************************************************
28 * PSDRV_SetDeviceClipping
30 void CDECL PSDRV_SetDeviceClipping( PSDRV_PDEVICE *physDev, HRGN vis_rgn, HRGN clip_rgn )
32 /* We could set a dirty flag here to speed up PSDRV_SetClip */
33 return;
36 /***********************************************************************
37 * PSDRV_SetClip
39 * The idea here is that every graphics operation should bracket
40 * output in PSDRV_SetClip/ResetClip calls. The clip path outside
41 * these calls will be empty; the reason for this is that it is
42 * impossible in PostScript to cleanly make the clip path larger than
43 * the current one. Also Photoshop assumes that despite having set a
44 * small clip area in the printer dc that it can still write raw
45 * PostScript to the driver and expect this code not to be clipped.
47 void PSDRV_SetClip( PSDRV_PDEVICE *physDev )
49 CHAR szArrayName[] = "clippath";
50 DWORD size;
51 RGNDATA *rgndata = NULL;
52 HRGN hrgn = CreateRectRgn(0,0,0,0);
53 BOOL empty;
55 TRACE("hdc=%p\n", physDev->hdc);
57 if(physDev->pathdepth) {
58 TRACE("inside a path, so not clipping\n");
59 goto end;
62 empty = !GetClipRgn(physDev->hdc, hrgn);
64 if(!empty) {
65 size = GetRegionData(hrgn, 0, NULL);
66 if(!size) {
67 ERR("Invalid region\n");
68 goto end;
71 rgndata = HeapAlloc( GetProcessHeap(), 0, size );
72 if(!rgndata) {
73 ERR("Can't allocate buffer\n");
74 goto end;
77 GetRegionData(hrgn, size, rgndata);
79 PSDRV_WriteGSave(physDev);
81 /* check for NULL region */
82 if (rgndata->rdh.nCount == 0)
84 /* set an empty clip path. */
85 PSDRV_WriteRectClip(physDev, 0, 0, 0, 0);
87 /* optimize when it is a simple region */
88 else if (rgndata->rdh.nCount == 1)
90 RECT *pRect = (RECT *)rgndata->Buffer;
92 PSDRV_WriteRectClip(physDev, pRect->left, pRect->top,
93 pRect->right - pRect->left,
94 pRect->bottom - pRect->top);
96 else
98 UINT i;
99 RECT *pRect = (RECT *)rgndata->Buffer;
101 PSDRV_WriteArrayDef(physDev, szArrayName, rgndata->rdh.nCount * 4);
103 for (i = 0; i < rgndata->rdh.nCount; i++, pRect++)
105 PSDRV_WriteArrayPut(physDev, szArrayName, i * 4,
106 pRect->left);
107 PSDRV_WriteArrayPut(physDev, szArrayName, i * 4 + 1,
108 pRect->top);
109 PSDRV_WriteArrayPut(physDev, szArrayName, i * 4 + 2,
110 pRect->right - pRect->left);
111 PSDRV_WriteArrayPut(physDev, szArrayName, i * 4 + 3,
112 pRect->bottom - pRect->top);
114 PSDRV_WriteRectClip2(physDev, szArrayName);
117 end:
118 HeapFree( GetProcessHeap(), 0, rgndata );
119 DeleteObject(hrgn);
123 /***********************************************************************
124 * PSDRV_ResetClip
126 void PSDRV_ResetClip( PSDRV_PDEVICE *physDev )
128 HRGN hrgn = CreateRectRgn(0,0,0,0);
129 BOOL empty;
131 empty = !GetClipRgn(physDev->hdc, hrgn);
132 if(!empty && !physDev->pathdepth)
133 PSDRV_WriteGRestore(physDev);
134 DeleteObject(hrgn);