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xcb: add xcb_init(): checks the x server + extensions, and caches atoms

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This commit is contained in:
Daniel Eklöf 2018-11-17 11:47:34 +01:00
parent 8bf8a398b9
commit 7c468c20c0
5 changed files with 126 additions and 106 deletions
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67
main.c
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@ -11,14 +11,10 @@
#include <sys/eventfd.h>
#include <xcb/xcb.h>
#include <xcb/randr.h>
#include <xcb/render.h>
#include "bar.h"
#include "config.h"
#include "yml.h"
#include "xcb.h"
static volatile sig_atomic_t aborted = 0;
@ -36,66 +32,7 @@ main(int argc, const char *const *argv)
struct yml_node *conf = yml_load(conf_file);
fclose(conf_file);
xcb_connection_t *conn = xcb_connect(NULL, NULL);
assert(conn != NULL);
const xcb_setup_t *setup = xcb_get_setup(conn);
/* Vendor string */
int length = xcb_setup_vendor_length(setup);
char *vendor = malloc(length + 1);
memcpy(vendor, xcb_setup_vendor(setup), length);
vendor[length] = '\0';
/* Vendor release number */
unsigned release = setup->release_number;
unsigned major = release / 10000000; release %= 10000000;
unsigned minor = release / 100000; release %= 100000;
unsigned patch = release / 1000;
printf("%s %u.%u.%u (protocol: %u.%u)\n", vendor,
major, minor, patch,
setup->protocol_major_version,
setup->protocol_minor_version);
free(vendor);
const xcb_query_extension_reply_t *randr =
xcb_get_extension_data(conn, &xcb_randr_id);
assert(randr->present);
const xcb_query_extension_reply_t *render =
xcb_get_extension_data(conn, &xcb_render_id);
assert(render->present);
xcb_randr_query_version_cookie_t randr_cookie =
xcb_randr_query_version(conn, XCB_RANDR_MAJOR_VERSION,
XCB_RANDR_MINOR_VERSION);
xcb_render_query_version_cookie_t render_cookie =
xcb_render_query_version(conn, XCB_RENDER_MAJOR_VERSION,
XCB_RENDER_MINOR_VERSION);
xcb_generic_error_t *e;
xcb_randr_query_version_reply_t *randr_version =
xcb_randr_query_version_reply(conn, randr_cookie, &e);
assert(e == NULL);
xcb_render_query_version_reply_t *render_version =
xcb_render_query_version_reply(conn, render_cookie, &e);
assert(e == NULL);
xcb_flush(conn);
printf(" RANDR: %u.%u\n"
" RENDER: %u.%u\n",
randr_version->major_version,
randr_version->minor_version,
render_version->major_version,
render_version->minor_version);
free(randr_version);
free(render_version);
xcb_disconnect(conn);
xcb_init();
const struct sigaction sa = {.sa_handler = &signal_handler};
sigaction(SIGINT, &sa, NULL);