1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/**
* 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 Affero 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 Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <xcb/xcb.h>
#include <xcb/randr.h>
/**
* The major version of RANDR the program expects
*/
#define RANDR_VERSION_MAJOR 1U
/**
* The minor version of RANDR the program expects
*/
#define RANDR_VERSION_MINOR 3U
/**
* Connection to the X server
*/
static xcb_connection_t* connection;
/**
* Used to store errors in
*/
static xcb_generic_error_t* error;
int main(int argc __attribute__((unused)), char** argv __attribute__((unused)))
{
xcb_randr_query_version_cookie_t version_cookie;
xcb_randr_query_version_reply_t* randr_version;
const xcb_setup_t* setup;
xcb_screen_iterator_t iter;
int screen_count;
xcb_screen_t* screens;
int screen_i;
/* Get X connection */
connection = xcb_connect(NULL, NULL);
/* Check RANDR protocol version */
version_cookie = xcb_randr_query_version(connection, RANDR_VERSION_MAJOR, RANDR_VERSION_MINOR);
randr_version = xcb_randr_query_version_reply(connection, version_cookie, &error);
if (error || (randr_version == NULL))
{
fprintf(stderr, "RANDR version query returned %i", error ? error->error_code : -1);
xcb_disconnect(connection);
return 1;
}
if (randr_version->major_version != RANDR_VERSION_MAJOR || randr_version->minor_version < RANDR_VERSION_MINOR)
{
fprintf(stderr, "Unsupported RANDR version, got %u.%u, expected %u.%u\n",
randr_version->major_version, randr_version->minor_version,
RANDR_VERSION_MAJOR, RANDR_VERSION_MINOR);
free(randr_version);
xcb_disconnect(connection);
return 1;
}
free(randr_version);
/* Get screen information */
setup = xcb_get_setup(connection);
iter = xcb_setup_roots_iterator(setup);
screen_count = iter.rem;
screens = iter.data;
printf("Screen count: %i\n", screen_count);
for (screen_i = 0; screen_i < screen_count; screen_i++)
{
xcb_screen_t* screen = screens + screen_i;
xcb_randr_get_screen_resources_current_cookie_t res_cookie;
xcb_randr_get_screen_resources_current_reply_t* res_reply;
xcb_randr_output_t* outputs;
xcb_randr_crtc_t* crtcs;
int output_i;
printf("Screen: %i\n", screen_i);
res_cookie = xcb_randr_get_screen_resources_current(connection, screen->root);
res_reply = xcb_randr_get_screen_resources_current_reply(connection, res_cookie, &error);
if (error)
{
fprintf(stderr, "RANDR screen resource query returned %i\n", error->error_code);
xcb_disconnect(connection);
return 1;
}
printf(" CRTC count: %i\n", res_reply->num_crtcs);
printf(" Output count: %i\n", res_reply->num_outputs);
outputs = xcb_randr_get_screen_resources_current_outputs(res_reply);
crtcs = xcb_randr_get_screen_resources_current_crtcs(res_reply);
for (output_i = 0; output_i < res_reply->num_outputs; output_i++)
{
xcb_randr_get_output_info_cookie_t out_cookie;
xcb_randr_get_output_info_reply_t* out_reply;
char* name;
char* name_;
int i;
out_cookie = xcb_randr_get_output_info(connection, outputs[output_i], res_reply->config_timestamp);
out_reply = xcb_randr_get_output_info_reply(connection, out_cookie, &error);
if (error)
{
fprintf(stderr, "RANDR output query returned %i\n", error->error_code);
xcb_disconnect(connection);
return 1;
}
printf(" Output: %i\n", output_i);
name_ = xcb_randr_get_output_info_name(out_reply);
name = alloca((out_reply->name_len + 1) * sizeof(char));
memcpy(name, name_, out_reply->name_len * sizeof(char));
*(name + out_reply->name_len) = 0;
printf(" Name: %s\n", name);
switch (out_reply->connection)
{
case XCB_RANDR_CONNECTION_CONNECTED:
{
int crtc_i;
printf(" Connection: connected\n");
printf(" Size: %i %i\n", out_reply->mm_width, out_reply->mm_height);
for (crtc_i = 0; crtc_i < res_reply->num_crtcs; crtc_i++)
if (crtcs[crtc_i] == out_reply->crtc)
printf(" CRTC: %i\n", crtc_i);
}
break;
case XCB_RANDR_CONNECTION_DISCONNECTED:
printf(" Connection: disconnected\n");
break;
case XCB_RANDR_CONNECTION_UNKNOWN:
default:
printf(" Connection: unknown\n");
break;
}
}
free(res_reply);
}
/* Free resources **/
xcb_disconnect(connection);
return 0;
}
|
