1 /* libwmf ("player/clip.h"): library for wmf conversion
2 Copyright (C) 2000 - various; see CREDITS, ChangeLog, and sources
3
4 The libwmf Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
8
9 The libwmf Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with the libwmf Library; see the file COPYING. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
18
19
20 #ifndef WMFPLAYER_CLIP_H
21 #define WMFPLAYER_CLIP_H
22
Clipping(wmfAPI * API,wmfRegion * clip,wmfRegion * vis,wmfD_Rect * rect,U16 flags)23 static void Clipping (wmfAPI* API,wmfRegion* clip,wmfRegion* vis,wmfD_Rect* rect,U16 flags)
24 { wmfRegion rgn;
25
26 rgn.rects = 0;
27
28 if (clip->numRects == 0)
29 { if (clip->rects)
30 { rgn.rects = clip->rects;
31 rgn.size = clip->size;
32
33 clip->rects = 0;
34 clip->size = 0;
35 }
36 }
37
38 if (rgn.rects == 0)
39 { rgn.rects = (wmfD_Rect*) wmf_malloc (API,8 * sizeof (wmfD_Rect));
40 rgn.size = 8;
41
42 if (ERR (API))
43 { WMF_DEBUG (API,"bailing...");
44 return;
45 }
46 }
47
48 WmfSetRectRgn (&rgn,rect);
49
50 if ((clip->numRects == 0) && (flags & CLIP_INTERSECT))
51 { (*clip) = rgn;
52 return;
53 }
54 /* else if (flags & CLIP_EXCLUDE) ...
55 */
56 if (clip->numRects == 0)
57 { if (clip->rects == 0)
58 { clip->rects = (wmfD_Rect*) wmf_malloc (API,8 * sizeof (wmfD_Rect));
59 clip->size = 8;
60
61 if (ERR (API))
62 { WMF_DEBUG (API,"bailing...");
63 return;
64 }
65 }
66
67 WmfSetRectRgn (clip,0);
68 WmfCombineRgn (API,clip,vis,0,RGN_COPY);
69
70 if (ERR (API))
71 { WMF_DEBUG (API,"bailing...");
72 return;
73 }
74 }
75
76 WmfCombineRgn (API,&rgn,clip,&rgn,(U16)((flags & CLIP_EXCLUDE) ? RGN_DIFF : RGN_AND));
77
78 if (ERR (API))
79 { WMF_DEBUG (API,"bailing...");
80 return;
81 }
82
83 (*clip) = rgn; /* What about what *was* in clip ?? Check WmfCombineRgn */
84 }
85
86 #endif /* ! WMFPLAYER_CLIP_H */
87