| 1 | /* Allocate X colors. Used for testing with dense colormaps. |
| 2 | |
| 3 | Copyright (C) 2001-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | |
| 21 | #include <X11/Xlib.h> |
| 22 | #include <stdio.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <stdarg.h> |
| 25 | #include <unistd.h> |
| 26 | |
| 27 | void |
| 28 | fatal (const char *fmt, ...) |
| 29 | { |
| 30 | va_list ap; |
| 31 | |
| 32 | va_start (ap, fmt); |
| 33 | vfprintf (stderr, fmt, ap); |
| 34 | fputc ('\n', stderr); |
| 35 | va_end (ap); |
| 36 | exit (1); |
| 37 | } |
| 38 | |
| 39 | void |
| 40 | usage (const char *progname) |
| 41 | { |
| 42 | fprintf (stderr, "Usage %s options\n", progname); |
| 43 | fprintf (stderr, "-n NCOLORS allocate NCOLORS colors\n"); |
| 44 | exit (1); |
| 45 | } |
| 46 | |
| 47 | int |
| 48 | main (int argc, char **argv) |
| 49 | { |
| 50 | Display *dpy; |
| 51 | int opt, ncolors = 0, i; |
| 52 | XColor *allocated; |
| 53 | int nallocated; |
| 54 | XColor color; |
| 55 | Colormap cmap; |
| 56 | |
| 57 | while ((opt = getopt (argc, argv, "n:")) != EOF) |
| 58 | switch (opt) |
| 59 | { |
| 60 | case 'n': |
| 61 | ncolors = atoi (optarg); |
| 62 | break; |
| 63 | |
| 64 | case '?': |
| 65 | usage (argv[0]); |
| 66 | } |
| 67 | |
| 68 | if (ncolors == 0) |
| 69 | usage (argv[0]); |
| 70 | |
| 71 | dpy = XOpenDisplay (""); |
| 72 | if (dpy == NULL) |
| 73 | fatal ("Cannot open display"); |
| 74 | cmap = DefaultColormap (dpy, 0); |
| 75 | |
| 76 | allocated = malloc (ncolors * sizeof *allocated); |
| 77 | nallocated = 0; |
| 78 | memset (&color, 0, sizeof color); |
| 79 | |
| 80 | while (nallocated < ncolors |
| 81 | && color.red < 65536) |
| 82 | { |
| 83 | allocated[nallocated] = color; |
| 84 | if (XAllocColor (dpy, cmap, &allocated[nallocated])) |
| 85 | { |
| 86 | for (i = 0; i < nallocated; ++i) |
| 87 | if (allocated[i].red == allocated[nallocated].red |
| 88 | && allocated[i].green == allocated[nallocated].green |
| 89 | && allocated[i].blue == allocated[nallocated].blue) |
| 90 | break; |
| 91 | |
| 92 | if (i == nallocated) |
| 93 | { |
| 94 | printf ("allocated %d/%d/%d\n", |
| 95 | allocated[nallocated].red, |
| 96 | allocated[nallocated].green, |
| 97 | allocated[nallocated].blue); |
| 98 | ++nallocated; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | ++color.red; |
| 103 | ++color.green; |
| 104 | ++color.blue; |
| 105 | } |
| 106 | |
| 107 | fprintf (stderr, "Waiting. Press ^C to stop.\n"); |
| 108 | while (1) |
| 109 | sleep (10); |
| 110 | |
| 111 | XCloseDisplay (dpy); |
| 112 | return 0; |
| 113 | } |