mirror of OpenBSD xenocara tree
github.com/openbsd/xenocara
openbsd
1/*
2 *
3 * Copyright © 2002 Keith Packard
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, and that the name of Keith Packard not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission. Keith Packard makes no
12 * representations about the suitability of this software for any purpose. It
13 * is provided "as is" without express or implied warranty.
14 *
15 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
22 */
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27#include "Xrenderint.h"
28
29Status
30XRenderParseColor(Display *dpy, char *spec, XRenderColor *def)
31{
32
33 if (!strncmp (spec, "rgba:", 5))
34 {
35 unsigned short elements[4];
36 unsigned short *pShort;
37 int i;
38
39 spec += 5;
40 /*
41 * Attempt to parse the value portion.
42 */
43 pShort = elements;
44 for (i = 0; i < 4; i++, pShort++, spec++) {
45 int n = 0;
46
47 *pShort = 0;
48 while (*spec != '/' && *spec != '\0') {
49 char c;
50
51 if (++n > 4) {
52 return 0;
53 }
54 c = *spec++;
55 *pShort = (unsigned short) (*pShort << 4);
56 if (c >= '0' && c <= '9')
57 *pShort = (unsigned short) (*pShort | (c - '0'));
58 /* assume string in lowercase
59 else if (c >= 'A' && c <= 'F')
60 *pShort |= c - ('A' - 10);
61 */
62 else if (c >= 'a' && c <= 'f')
63 *pShort = (unsigned short) (*pShort | (c - ('a' - 10)));
64 else return 0;
65 }
66 if (n == 0)
67 return 0;
68 if (n < 4) {
69 *pShort = (unsigned short) (((unsigned long)*pShort * 0xFFFF) / (unsigned long) ((1 << n*4) - 1));
70 }
71 }
72 def->red = elements[0];
73 def->green = elements[1];
74 def->blue = elements[2];
75 def->alpha = elements[3];
76 }
77 else
78 {
79 XColor coreColor;
80 Colormap colormap;
81
82 colormap = DefaultColormap (dpy, DefaultScreen (dpy));
83 if (!XParseColor (dpy, colormap, spec, &coreColor))
84 return 0;
85 def->red = coreColor.red;
86 def->green = coreColor.green;
87 def->blue = coreColor.blue;
88 def->alpha = 0xffff;
89 }
90 def->red = (unsigned short) ((unsigned) (def->red * def->alpha) / 0xffffU);
91 def->green = (unsigned short) ((unsigned) (def->green * def->alpha) / 0xffffU);
92 def->blue = (unsigned short) ((unsigned) (def->blue * def->alpha) / 0xffffU);
93 return 1;
94}