DrArc.c revision b4ee4795 
1/*
2
3Copyright 1986, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25*/
26
27/* Note to future maintainers:  XDrawArc does NOT batch successive PolyArc
28   requests into a single request like XDrawLine, XDrawPoint, etc.
29   We don't do this because X_PolyArc applies the GC's join-style if
30   the last point in one arc coincides with the first point in another.
31   The client wouldn't expect this and would have no easy way to defeat it. */
32
33#ifdef HAVE_CONFIG_H
34#include <config.h>
35#endif
36#include "Xlibint.h"
37
38int
39XDrawArc(
40    register Display *dpy,
41    Drawable d,
42    GC gc,
43    int x,
44    int y, /* INT16 */
45    unsigned int width,
46    unsigned int height, /* CARD16 */
47    int angle1,
48    int angle2) /* INT16 */
49{
50    register xPolyArcReq *req;
51    register xArc *arc;
52#ifdef MUSTCOPY
53    xArc arcdata;
54    long len = SIZEOF(xArc);
55
56    arc = &arcdata;
57#endif /* MUSTCOPY */
58
59    LockDisplay(dpy);
60    FlushGC(dpy, gc);
61    GetReqExtra (PolyArc, SIZEOF(xArc), req);
62
63    req->drawable = d;
64    req->gc = gc->gid;
65
66#ifndef MUSTCOPY
67    arc = (xArc *) NEXTPTR(req,xPolyArcReq);
68#endif /* MUSTCOPY */
69
70    arc->x = x;
71    arc->y = y;
72    arc->width = width;
73    arc->height = height;
74    arc->angle1 = angle1;
75    arc->angle2 = angle2;
76
77#ifdef MUSTCOPY
78    dpy->bufptr -= SIZEOF(xArc);
79    Data (dpy, (char *) arc, len);
80#endif /* MUSTCOPY */
81
82    UnlockDisplay(dpy);
83    SyncHandle();
84    return 1;
85}
86