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/**
* Copyright © 2014 Mattias Andrée (maandree@member.fsf.org)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE /* for strcasestr */
#include <stdlib.h>
#include <stdio.h>
#include <alloca.h>
#include <string.h>
#include <xcb/xcb.h>
/**
* Connection to the X server
*/
static xcb_connection_t* connection;
/**
* Used to store errors in
*/
static xcb_generic_error_t* error;
/**
* Main entry point of the program
*
* @param argc Length of `argv`
* @param argv Command line arguments
* @return Zero on success
*/
int main(int argc, char** argv)
{
const xcb_setup_t* setup;
xcb_screen_iterator_t iter;
int screen_count;
xcb_screen_t* screens;
int screen_i;
(void) argc;
(void) argv;
/* Get X connection */
connection = xcb_connect(NULL, NULL);
/* Get screen information */
setup = xcb_get_setup(connection);
iter = xcb_setup_roots_iterator(setup);
screen_count = iter.rem;
screens = iter.data;
for (screen_i = 0; screen_i < screen_count; screen_i++)
{
xcb_screen_t* screen = screens + screen_i;
xcb_list_properties_cookie_t list_cookie;
xcb_list_properties_reply_t* list_reply;
xcb_atom_t* atoms;
xcb_atom_t* atoms_end;
/* Get root window properties */
list_cookie = xcb_list_properties(connection, screen->root);
list_reply = xcb_list_properties_reply(connection, list_cookie, &error);
if (error)
{
fprintf(stderr, "Screen root window property list query returned %i\n", error->error_code);
xcb_disconnect(connection);
return 1;
}
atoms = xcb_list_properties_atoms(list_reply);
atoms_end = atoms + xcb_list_properties_atoms_length(list_reply);
for (; atoms != atoms_end; atoms++)
{
xcb_get_atom_name_cookie_t name_cookie;
xcb_get_atom_name_reply_t* name_reply;
char* name;
char* name_;
int len;
xcb_get_property_cookie_t prop_cookie;
xcb_get_property_reply_t* prop_reply;
int monitor;
/* Get root window property name */
name_cookie = xcb_get_atom_name(connection, *atoms);
name_reply = xcb_get_atom_name_reply(connection, name_cookie, &error);
if (error)
{
fprintf(stderr, "Screen root window property name query returned %i\n", error->error_code);
free(list_reply);
xcb_disconnect(connection);
return 1;
}
name_ = xcb_get_atom_name_name(name_reply);
len = xcb_get_atom_name_name_length(name_reply);
name = alloca((len + 1) * sizeof(char));
memcpy(name, name_, len * sizeof(char));
*(name + len) = 0;
free(name_reply);
/* Check property name pattern */
if (!strcmp(name, "_icc_profile"))
monitor = 0;
else if (strcasestr(name, "_icc_profile_") == name)
{
name += strlen("_icc_profile_");
monitor = 0;
if (*name)
continue;
while (*name)
{
char c = *name;
if (('0' <= c) && (c <= '9'))
monitor = monitor * 10 - (c & 15);
else
goto monitor_bad;
}
monitor = -monitor;
goto monitor_ok;
monitor_bad:
continue;
}
else
continue;
/* Get root window property value */
monitor_ok:
prop_cookie = xcb_get_property(connection, 0, screen->root, *atoms, XCB_GET_PROPERTY_TYPE_ANY, 0, 0);
prop_reply = xcb_get_property_reply(connection, prop_cookie, &error);
if (error)
{
fprintf(stderr, "Screen root window property value query returned %i\n", error->error_code);
free(prop_reply);
free(list_reply);
xcb_disconnect(connection);
return 1;
}
len = prop_reply->bytes_after;
free(prop_reply);
prop_cookie = xcb_get_property(connection, 0, screen->root, *atoms, XCB_GET_PROPERTY_TYPE_ANY, 0, len);
prop_reply = xcb_get_property_reply(connection, prop_cookie, &error);
if (error)
{
fprintf(stderr, "Screen root window property value query returned %i\n", error->error_code);
free(prop_reply);
free(list_reply);
xcb_disconnect(connection);
return 1;
}
{
char* value = alloca((2 * len + 1) * sizeof(char));
char* value_ = xcb_get_property_value(prop_reply);
int i;
for (i = 0; i < len; i++)
{
*(value + i * 2 + 0) = "0123456789abcdef"[(*(value_ + i) >> 4) & 15];
*(value + i * 2 + 1) = "0123456789abcdef"[(*(value_ + i) >> 0) & 15];
}
*(value + 2 * len) = 0;
printf("%i: %i: %s\n", screen_i, monitor, value);
}
free(prop_reply);
}
free(list_reply);
}
fflush(stdout);
/* Free resources **/
xcb_disconnect(connection);
return 0;
}
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