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
|
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <string.h>
#include "any_log.h"
#include "display.h"
void display_init(display_t *display)
{
memset(display, 0, sizeof(display_t));
int preferred_screen = 0;
display->connection = xcb_connect(NULL, &preferred_screen);
assert(display->connection != NULL && !xcb_connection_has_error(display->connection));
log_value_debug("Xcb connection established",
"i:preferred_screen", preferred_screen);
xcb_screen_iterator_t iter = xcb_setup_roots_iterator(xcb_get_setup(display->connection));
while (preferred_screen != 0 && iter.rem) {
xcb_screen_next(&iter);
preferred_screen--;
}
display->screen = iter.data;
xcb_generic_error_t *error;
xcb_randr_query_version_cookie_t version_cookie = xcb_randr_query_version(display->connection,
XCB_RANDR_MAJOR_VERSION,
XCB_RANDR_MINOR_VERSION);
xcb_randr_query_version_reply_t *randr_version = xcb_randr_query_version_reply(display->connection,
version_cookie,
&error);
assert(error == NULL);
log_value_debug("RandR loaded",
"i:major", randr_version->major_version,
"i:minor", randr_version->minor_version);
assert(randr_version->major_version >= 1);
free(randr_version);
xcb_randr_get_screen_info_cookie_t cookie = xcb_randr_get_screen_info(display->connection, display->screen->root);
display->info_reply = xcb_randr_get_screen_info_reply(display->connection, cookie, &error);
assert(error == NULL);
display->screen_size = xcb_randr_get_screen_info_sizes(display->info_reply);
assert(display->screen_size != NULL);
log_debug("Display size [width=%d, height=%d]", display->screen_size->width, display->screen_size->height);
xcb_randr_select_input(display->connection,
display->screen->root,
XCB_RANDR_NOTIFY_MASK_SCREEN_CHANGE |
XCB_RANDR_NOTIFY_MASK_OUTPUT_CHANGE |
XCB_RANDR_NOTIFY_MASK_OUTPUT_PROPERTY);
log_debug("Searching 32 bit visual");
display->visual_type = xcb_aux_find_visual_by_attrs(display->screen, XCB_VISUAL_CLASS_TRUE_COLOR, 32);
display->screen_depth = 32;
if (display->visual_type == NULL) {
// NOTE: 24 bit visuals don't have the alpha channel for transparency
log_debug("Falling back to 24 bit visual");
display->visual_type = xcb_aux_find_visual_by_attrs(display->screen, XCB_VISUAL_CLASS_TRUE_COLOR, 24);
display->screen_depth = 24;
}
assert(display->visual_type != 0);
xcb_intern_atom_cookie_t *ewmh_cookie = xcb_ewmh_init_atoms(display->connection, &display->ewmh);
assert(xcb_ewmh_init_atoms_replies(&display->ewmh, ewmh_cookie, &error));
assert(error == NULL);
log_debug("Xcb EWMH initialized");
display->database = xcb_xrm_database_from_default(display->connection);
assert(display->database != NULL);
display_update_scale(display);
assert(xcb_errors_context_new(display->connection, &display->errors) == 0);
log_debug("Xcb errors loaded");
xcb_flush(display->connection);
}
bool display_query_xrm(display_t *display, const char *resource, char **value)
{
bool found = xcb_xrm_resource_get_string(display->database, resource, NULL, value) >= 0;
log_value_debug("Xrm query",
"b:found", found,
"s:resource", resource,
"s:value", *value ? *value : "");
return found;
}
void display_update_xrm(display_t *display)
{
xcb_flush(display->connection);
xcb_xrm_database_t *database = xcb_xrm_database_from_default(display->connection);
if (database == NULL) {
log_warn("Xrm database couldn't be updated");
return;
}
xcb_xrm_database_free(display->database);
display->database = database;
log_debug("Xrm database updated");
}
void display_update_scale(display_t *display)
{
char *dpi_value;
if (display_query_xrm(display, "Xft.dpi", &dpi_value)) {
display->screen_dpi = strtod(dpi_value, NULL);
free(dpi_value);
// Ignore invalid values
if (display->screen_dpi != 0)
return;
}
display->screen_dpi = (double)display->screen_size->height * 25.4 / (double)display->screen_size->mheight;
log_debug("Fallback dpi value '%.2lf'", display->screen_dpi);
}
void display_close(display_t *display)
{
xcb_ewmh_connection_wipe(&display->ewmh);
xcb_errors_context_free(display->errors);
xcb_xrm_database_free(display->database);
xcb_disconnect(display->connection);
free(display->info_reply);
}
|
