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115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/* Allocate X colors. Used for testing with dense colormaps.
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Copyright (C) 2001-2022 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at
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your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
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#include <X11/Xlib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <string.h>
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void
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fatal (const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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vfprintf (stderr, fmt, ap);
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fputc ('\n', stderr);
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va_end (ap);
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exit (1);
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}
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void
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usage (const char *progname)
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{
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fprintf (stderr, "Usage %s options\n", progname);
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fprintf (stderr, "-n NCOLORS allocate NCOLORS colors\n");
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exit (1);
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}
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int
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main (int argc, char **argv)
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{
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Display *dpy;
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int opt, ncolors = 0, i;
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XColor *allocated;
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int nallocated;
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XColor color;
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Colormap cmap;
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while ((opt = getopt (argc, argv, "n:")) != EOF)
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switch (opt)
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{
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case 'n':
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ncolors = atoi (optarg);
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break;
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case '?':
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usage (argv[0]);
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}
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if (ncolors == 0)
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usage (argv[0]);
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dpy = XOpenDisplay ("");
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if (dpy == NULL)
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fatal ("Cannot open display");
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cmap = DefaultColormap (dpy, 0);
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allocated = malloc (ncolors * sizeof *allocated);
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nallocated = 0;
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memset (&color, 0, sizeof color);
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while (nallocated < ncolors
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&& color.red < 65536)
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{
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allocated[nallocated] = color;
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if (XAllocColor (dpy, cmap, &allocated[nallocated]))
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{
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for (i = 0; i < nallocated; ++i)
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if (allocated[i].red == allocated[nallocated].red
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&& allocated[i].green == allocated[nallocated].green
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&& allocated[i].blue == allocated[nallocated].blue)
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break;
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if (i == nallocated)
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{
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printf ("allocated %d/%d/%d\n",
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allocated[nallocated].red,
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allocated[nallocated].green,
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allocated[nallocated].blue);
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++nallocated;
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}
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}
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++color.red;
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++color.green;
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++color.blue;
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}
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fprintf (stderr, "Waiting. Press ^C to stop.\n");
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while (1)
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sleep (10);
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XCloseDisplay (dpy);
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return 0;
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}
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