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{{noteTA|G1=IT|G2=FL}}
{{Infobox_Software
| name = XCB
| logo = Xcb logo.svg
| logo size = 200px
| developer = Jamey Sharp、Josh Triplett、Bart Massey
| latest_release_version = 1.14
| latest_release_date = {{release date and age|2020|02|22}} <ref>{{cite mailing list |url=https://lists.x.org/archives/xorg-announce/2020-February/003039.html |title=[ANNOUNCE] libxcb 1.14 |date=2020-02-22 |accessdate=2020-02-22 |mailinglist=xcb |archive-date=2021-02-26 |archive-url=https://web.archive.org/web/20210226161646/https://lists.x.org/archives/xorg-announce/2020-February/003039.html }}</ref>
| operating_system = [[POSIX]]
| license = [[MIT許可證]]
| genre = [[X Window核心協議]]開發函式庫
| website = [http://xcb.freedesktop.org xcb.freedesktop.org]
}}
'''XCB'''（X C Binding）是一套以 [[C語言]]撰寫，並用於綁定（Binding） [[X Window System]]之上。XCB是一套免費的軟體，目標在於取代 [[Xlib]]。這個計劃開始於2001年，作者是Bart Massey.

== 理念 ==
XCB 主要目標是:

* 減輕函式庫的大小與複雜度;
* 可直接存取 [[X Window核心協議]]。

== 範例 ==
<syntaxhighlight lang="c">
/* Simple XCB application drawing a box in a window */

#include <xcb/xcb.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{
xcb_connection_t *c;
xcb_screen_t *s;
xcb_window_t w;
xcb_gcontext_t g;
xcb_generic_event_t *e;
uint32_t mask;
uint32_t values[2];
int done = 0;
xcb_rectangle_t r = { 20, 20, 60, 60 };

/* open connection with the server */
c = xcb_connect(NULL,NULL);
if (xcb_connection_has_error(c)) {
printf("Cannot open display\n");
exit(1);
}
/* get the first screen */
s = xcb_setup_roots_iterator( xcb_get_setup(c) ).data;

/* create black graphics context */
g = xcb_generate_id(c);
w = s->root;
mask = XCB_GC_FOREGROUND | XCB_GC_GRAPHICS_EXPOSURES;
values[0] = s->black_pixel;
values[1] = 0;
xcb_create_gc(c, g, w, mask, values);

/* create window */
w = xcb_generate_id(c);
mask = XCB_CW_BACK_PIXEL | XCB_CW_EVENT_MASK;
values[0] = s->white_pixel;
values[1] = XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_KEY_PRESS;
xcb_create_window(c, s->root_depth, w, s->root,
10, 10, 100, 100, 1,
XCB_WINDOW_CLASS_INPUT_OUTPUT, s->root_visual,
mask, values);

/* map (show) the window */
xcb_map_window(c, w);

xcb_flush(c);

/* event loop */
while (!done && (e = xcb_wait_for_event(c))) {
switch (e->response_type & ~0x80) {
case XCB_EXPOSE: /* draw or redraw the window */
xcb_poly_fill_rectangle(c, w, g, 1, &r);
xcb_flush(c);
break;
case XCB_KEY_PRESS: /* exit on key press */
done = 1;
break;
}
free(e);
}
/* close connection to server */
xcb_disconnect(c);

return 0;
}
</syntaxhighlight>

== 注釋 ==
<references/>

== 外部連結 ==
* [http://xcb.freedesktop.org/ XCB wiki] {{Wayback|url=http://xcb.freedesktop.org/ |date=20220509101308 }} ([[freedesktop.org]])
* [http://xcb.freedesktop.org/XcbApi/ XCB API reference] {{Wayback|url=http://xcb.freedesktop.org/XcbApi/ |date=20220119133534 }}
* [http://xcb.freedesktop.org/Publications Further publications] {{Wayback|url=http://xcb.freedesktop.org/Publications |date=20201027141453 }}

{{Freedesktop.org}}
{{XWinSys}}
[[Category:X Window系統]]

XCB - 版本历史

imported>InternetArchiveBot：​补救4个来源，并将0个来源标记为失效。) #IABot (v2.0.8.7

imported>InternetArchiveBot：补救4个来源，并将0个来源标记为失效。) #IABot (v2.0.8.7