Commit | Line | Data |
---|---|---|
a09e091a JB |
1 | /*********************************************************** |
2 | ||
3 | Copyright 1987, 1998 The Open Group | |
4 | ||
5 | Permission to use, copy, modify, distribute, and sell this software and its | |
6 | documentation for any purpose is hereby granted without fee, provided that | |
7 | the above copyright notice appear in all copies and that both that | |
8 | copyright notice and this permission notice appear in supporting | |
9 | documentation. | |
10 | ||
11 | The above copyright notice and this permission notice shall be included in | |
12 | all copies or substantial portions of the Software. | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |
18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
20 | ||
21 | Except as contained in this notice, the name of The Open Group shall not be | |
22 | used in advertising or otherwise to promote the sale, use or other dealings | |
23 | in this Software without prior written authorization from The Open Group. | |
24 | ||
25 | Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. | |
26 | ||
27 | All Rights Reserved | |
28 | ||
29 | Permission to use, copy, modify, and distribute this software and its | |
30 | documentation for any purpose and without fee is hereby granted, | |
31 | provided that the above copyright notice appear in all copies and that | |
32 | both that copyright notice and this permission notice appear in | |
33 | supporting documentation, and that the name of Digital not be | |
34 | used in advertising or publicity pertaining to distribution of the | |
35 | software without specific, written prior permission. | |
36 | ||
37 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
38 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
39 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
40 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
41 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
42 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
43 | SOFTWARE. | |
44 | ||
45 | ******************************************************************/ | |
46 | #ifdef HAVE_DIX_CONFIG_H | |
47 | #include <dix-config.h> | |
48 | #endif | |
49 | ||
50 | #include "regionstr.h" | |
51 | #include "mistruct.h" | |
52 | #include "mifpoly.h" | |
53 | ||
54 | void | |
55 | miStepDash(int dist, /* distance to step */ | |
56 | int *pDashIndex, /* current dash */ | |
57 | unsigned char *pDash, /* dash list */ | |
58 | int numInDashList, /* total length of dash list */ | |
59 | int *pDashOffset /* offset into current dash */ | |
60 | ) | |
61 | { | |
62 | int dashIndex, dashOffset; | |
63 | int totallen; | |
64 | int i; | |
65 | ||
66 | dashIndex = *pDashIndex; | |
67 | dashOffset = *pDashOffset; | |
68 | if (dist < pDash[dashIndex] - dashOffset) { | |
69 | *pDashOffset = dashOffset + dist; | |
70 | return; | |
71 | } | |
72 | dist -= pDash[dashIndex] - dashOffset; | |
73 | if (++dashIndex == numInDashList) | |
74 | dashIndex = 0; | |
75 | totallen = 0; | |
76 | for (i = 0; i < numInDashList; i++) | |
77 | totallen += pDash[i]; | |
78 | if (totallen <= dist) | |
79 | dist = dist % totallen; | |
80 | while (dist >= pDash[dashIndex]) { | |
81 | dist -= pDash[dashIndex]; | |
82 | if (++dashIndex == numInDashList) | |
83 | dashIndex = 0; | |
84 | } | |
85 | *pDashIndex = dashIndex; | |
86 | *pDashOffset = dist; | |
87 | } |