ParseCol.c revision 1ab64890 
1/* $Xorg: ParseCol.c,v 1.4 2001/02/09 02:03:35 xorgcvs Exp $ */
2/*
3
4Copyright 1985, 1998  The Open Group
5
6Permission to use, copy, modify, distribute, and sell this software and its
7documentation for any purpose is hereby granted without fee, provided that
8the above copyright notice appear in all copies and that both that
9copyright notice and this permission notice appear in supporting
10documentation.
11
12The above copyright notice and this permission notice shall be included in
13all copies or substantial portions of the Software.
14
15THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
18OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
19AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22Except as contained in this notice, the name of The Open Group shall not be
23used in advertising or otherwise to promote the sale, use or other dealings
24in this Software without prior written authorization from The Open Group.
25
26*/
27/* $XFree86: xc/lib/X11/ParseCol.c,v 1.6 2003/04/13 19:22:17 dawes Exp $ */
28
29#define NEED_REPLIES
30#ifdef HAVE_CONFIG_H
31#include <config.h>
32#endif
33#include <stdio.h>
34#include "Xlibint.h"
35#include "Xcmsint.h"
36
37
38Status
39XParseColor (
40	register Display *dpy,
41        Colormap cmap,
42	_Xconst char *spec,
43	XColor *def)
44{
45	register int n, i;
46	int r, g, b;
47	char c;
48	XcmsCCC ccc;
49	XcmsColor cmsColor;
50
51        if (!spec) return(0);
52	n = strlen (spec);
53	if (*spec == '#') {
54	    /*
55	     * RGB
56	     */
57	    spec++;
58	    n--;
59	    if (n != 3 && n != 6 && n != 9 && n != 12)
60		return (0);
61	    n /= 3;
62	    g = b = 0;
63	    do {
64		r = g;
65		g = b;
66		b = 0;
67		for (i = n; --i >= 0; ) {
68		    c = *spec++;
69		    b <<= 4;
70		    if (c >= '0' && c <= '9')
71			b |= c - '0';
72		    else if (c >= 'A' && c <= 'F')
73			b |= c - ('A' - 10);
74		    else if (c >= 'a' && c <= 'f')
75			b |= c - ('a' - 10);
76		    else return (0);
77		}
78	    } while (*spec != '\0');
79	    n <<= 2;
80	    n = 16 - n;
81	    def->red = r << n;
82	    def->green = g << n;
83	    def->blue = b << n;
84	    def->flags = DoRed | DoGreen | DoBlue;
85	    return (1);
86	}
87
88
89#ifdef XCMS
90	/*
91	 * Let's Attempt to use Xcms and i18n approach to Parse Color
92	 */
93	if ((ccc = XcmsCCCOfColormap(dpy, cmap)) != (XcmsCCC)NULL) {
94	    const char *tmpName = spec;
95
96	    switch (_XcmsResolveColorString(ccc, &tmpName, &cmsColor,
97					    XcmsRGBFormat)) {
98	    case XcmsSuccess:
99	    case XcmsSuccessWithCompression:
100		cmsColor.pixel = def->pixel;
101		_XcmsRGB_to_XColor(&cmsColor, def, 1);
102		return(1);
103	    case XcmsFailure:
104	    case _XCMS_NEWNAME:
105		/*
106		 * if the result was _XCMS_NEWNAME tmpName points to
107		 * a string in cmsColNm.c:pairs table, for example,
108		 * gray70 would become tekhvc:0.0/70.0/0.0
109		 */
110		break;
111	    }
112	}
113#endif
114
115	/*
116	 * Xcms and i18n methods failed, so lets pass it to the server
117	 * for parsing.
118	 */
119	{
120	    xLookupColorReply reply;
121	    register xLookupColorReq *req;
122	    LockDisplay(dpy);
123	    GetReq (LookupColor, req);
124	    req->cmap = cmap;
125	    req->nbytes = n = strlen(spec);
126	    req->length += (n + 3) >> 2;
127	    Data (dpy, spec, (long)n);
128	    if (!_XReply (dpy, (xReply *) &reply, 0, xTrue)) {
129		UnlockDisplay(dpy);
130		SyncHandle();
131		return (0);
132		}
133	    def->red = reply.exactRed;
134	    def->green = reply.exactGreen;
135	    def->blue = reply.exactBlue;
136	    def->flags = DoRed | DoGreen | DoBlue;
137	    UnlockDisplay(dpy);
138	    SyncHandle();
139	    return (1);
140	}
141}
142