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id="toc-Protocol_description-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Logo" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Logo"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Logo</span> </div> </a> <ul id="toc-Logo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other_language_bindings" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Other_language_bindings"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Other language bindings</span> </div> </a> <ul id="toc-Other_language_bindings-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">XCB</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 7 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-7" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">7 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/XCB" title="XCB – German" lang="de" hreflang="de" data-title="XCB" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/XCB" title="XCB – Spanish" lang="es" hreflang="es" data-title="XCB" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/XCB" title="XCB – French" lang="fr" hreflang="fr" data-title="XCB" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/XCB" title="XCB – Korean" lang="ko" hreflang="ko" data-title="XCB" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/XCB" title="XCB – Japanese" lang="ja" hreflang="ja" data-title="XCB" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/XCB" title="XCB – Russian" lang="ru" hreflang="ru" data-title="XCB" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/XCB" title="XCB – Chinese" lang="zh" hreflang="zh" data-title="XCB" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1557445#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/XCB" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:XCB" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/XCB"><span>Read</span></a></li><li id="ca-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=XCB&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=XCB&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/XCB"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=XCB&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=XCB&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/XCB" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/XCB" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=XCB&oldid=1231543598" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=XCB&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=XCB&id=1231543598&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FXCB"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FXCB"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=XCB&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=XCB&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:XCB" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1557445" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">X protocol C language binding library</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-Primary_sources plainlinks metadata ambox ambox-content ambox-Primary_sources" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>relies excessively on <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">references</a> to <a href="/wiki/Wikipedia:No_original_research#Primary,_secondary_and_tertiary_sources" title="Wikipedia:No original research">primary sources</a></b>.<span class="hide-when-compact"> Please improve this article by adding <a href="/wiki/Wikipedia:No_original_research#Primary,_secondary_and_tertiary_sources" title="Wikipedia:No original research">secondary or tertiary sources</a>. <br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22XCB%22">"XCB"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22XCB%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22XCB%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22XCB%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22XCB%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22XCB%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">November 2009</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox vevent"><tbody><tr><td colspan="2" class="infobox-image logo"><span typeof="mw:File"><a href="/wiki/File:Xcb_logo.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Xcb_logo.svg/250px-Xcb_logo.svg.png" decoding="async" width="200" height="143" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Xcb_logo.svg/330px-Xcb_logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/78/Xcb_logo.svg/500px-Xcb_logo.svg.png 2x" data-file-width="1225" data-file-height="875" /></a></span></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Original author(s)</a></th><td class="infobox-data">Bart Massey</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data">Jamey Sharp, Josh Triplett, Bart Massey</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">2001<span class="noprint">; 24 years ago</span><span style="display:none"> (<span class="bday dtstart published updated">2001</span>)</span></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1257001546" /></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_release_life_cycle" title="Software release life cycle">Stable release</a></th><td class="infobox-data"><div style="margin:0px;">1.17.0<sup id="cite_ref-wikidata-2a66aa0ffffa9227d656621c2a1f0c39c62faf36-v18_1-0" class="reference"><a href="#cite_note-wikidata-2a66aa0ffffa9227d656621c2a1f0c39c62faf36-v18-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1557445?uselang=en#P348" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span> / 15 April 2024<span class="noprint">; 11 months ago</span><span style="display:none"> (<span class="bday dtstart published updated">15 April 2024</span>)</span></div></td></tr><tr style="display:none"><td colspan="2"> </td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Repository_(version_control)" title="Repository (version control)">Repository</a></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><span class="url"><a rel="nofollow" class="external text" href="https://gitlab.freedesktop.org/xorg/lib/libxcb">gitlab<wbr />.freedesktop<wbr />.org<wbr />/xorg<wbr />/lib<wbr />/libxcb</a></span> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q1557445#P1324" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></li></ul> </div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Written in</th><td class="infobox-data"><a href="/wiki/C_(programming_language)" title="C (programming language)">C</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="/wiki/POSIX" title="POSIX">POSIX</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="/wiki/X_Window_System_core_protocol" title="X Window System core protocol">X11 client library</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="/wiki/Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="/wiki/MIT_License" title="MIT License">MIT License</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="https://xcb.freedesktop.org">xcb<wbr />.freedesktop<wbr />.org</a></span></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:X11_display_server_protocol.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/X11_display_server_protocol.svg/220px-X11_display_server_protocol.svg.png" decoding="async" width="220" height="129" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b2/X11_display_server_protocol.svg/330px-X11_display_server_protocol.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b2/X11_display_server_protocol.svg/440px-X11_display_server_protocol.svg.png 2x" data-file-width="640" data-file-height="375" /></a><figcaption>X11-clients use XCB to communicate with the <a href="/wiki/Display_server" class="mw-redirect" title="Display server">X server</a>.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Linux_Graphics_Stack_2013.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Linux_Graphics_Stack_2013.svg/250px-Linux_Graphics_Stack_2013.svg.png" decoding="async" width="220" height="124" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Linux_Graphics_Stack_2013.svg/330px-Linux_Graphics_Stack_2013.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Linux_Graphics_Stack_2013.svg/500px-Linux_Graphics_Stack_2013.svg.png 2x" data-file-width="1280" data-file-height="720" /></a><figcaption>A more complete view of the <a href="/wiki/Linux" title="Linux">Linux</a> graphics stack</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg/250px-Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg.png" decoding="async" width="220" height="81" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg/330px-Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg/500px-Xlib_and_XCB_in_the_X_Window_System_graphics_stack.svg.png 2x" data-file-width="1000" data-file-height="369" /></a><figcaption>Programs often use <a href="/wiki/GTK" title="GTK">GTK</a> or <a href="/wiki/FLTK" title="FLTK">FLTK</a> or <a href="/wiki/Qt_(software)" title="Qt (software)">Qt</a> for their <a href="/wiki/GUI_widget" class="mw-redirect" title="GUI widget">GUI widgets</a>.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Free_and_open-source-software_display_servers_and_UI_toolkits.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Free_and_open-source-software_display_servers_and_UI_toolkits.svg/250px-Free_and_open-source-software_display_servers_and_UI_toolkits.svg.png" decoding="async" width="220" height="101" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Free_and_open-source-software_display_servers_and_UI_toolkits.svg/330px-Free_and_open-source-software_display_servers_and_UI_toolkits.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Free_and_open-source-software_display_servers_and_UI_toolkits.svg/500px-Free_and_open-source-software_display_servers_and_UI_toolkits.svg.png 2x" data-file-width="1573" data-file-height="720" /></a><figcaption>A more complete view of the components of an operating system for home computers.</figcaption></figure> <p><b>XCB</b> (<i>X protocol C-language Binding</i>) is a <a href="/wiki/Library_(computer_science)" class="mw-redirect" title="Library (computer science)">library</a> implementing the client-side of the <a href="/wiki/X_Window_System_core_protocol" title="X Window System core protocol">X11</a> display server protocol. XCB is written in the <a href="/wiki/C_(programming_language)" title="C (programming language)">C programming language</a> and distributed under the <a href="/wiki/MIT_License" title="MIT License">MIT License</a>. The project was started in 2001 by Bart Massey and aims to replace <a href="/wiki/Xlib" title="Xlib">Xlib</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>XCB was designed as a smaller, modernized replacement for Xlib, previously the primary C library for communicating with the X window system, coinciding with a more complete overhaul of the X implementation that took place during the early 2000s.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The main goals of XCB are to: </p> <ul><li>reduce library size and complexity</li> <li>provide direct access to the <a href="/wiki/X_Window_core_protocol" class="mw-redirect" title="X Window core protocol">X11 protocol</a></li></ul> <p>The required size reduction is achieved primarily by restricting XCB's scope to handling the X protocol and omitting Xlib functionality such as its extensive utility library, much of which saw little use by applications. This results in a factor thirty reduction of the compiled library size (as of 2004).<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Secondary goals include making the C interface <a href="/wiki/Asynchronous_communication" title="Asynchronous communication">asynchronous</a>, facilitating better <a href="/wiki/Thread_(computing)" title="Thread (computing)">multithreading</a> and making it easier to implement extensions (via <a href="/wiki/XML" title="XML">XML</a> protocol descriptions). </p><p>The core and extension protocol descriptions are in <a href="/wiki/XML" title="XML">XML</a>, with a program written in <a href="/wiki/Python_(programming_language)" title="Python (programming language)">Python</a> creating the C bindings. (Previous versions used <a href="/wiki/XSLT" title="XSLT">XSLT</a> and <a href="/wiki/M4_(computer_language)" title="M4 (computer language)">M4</a>.) </p><p>A further goal is to be able to use these protocol descriptions to create protocol documentation, more language bindings, and server-side stubs. </p><p>Massey and others have worked to prove key portions of XCB <a href="/wiki/Formal_verification" title="Formal verification">formally correct</a> using <a href="/wiki/Z_notation" title="Z notation">Z notation</a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> (Xlib has long been known to contain errors.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>) </p> <div class="mw-heading mw-heading3"><h3 id="Xlib_compatibility">Xlib compatibility</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=2" title="Edit section: Xlib compatibility"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><i>Xlib/XCB</i> provides <a href="/wiki/Application_binary_interface" title="Application binary interface">application binary interface</a> compatibility with both Xlib and XCB, providing an incremental porting path.<sup id="cite_ref-Maloney2018_6-0" class="reference"><a href="#cite_note-Maloney2018-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Xlib/XCB uses the protocol layer of Xlib, but replaces the Xlib transport layer with XCB, and provides access to the underlying XCB connection for direct use of XCB. Xlib/XCB allows an application to open a single connection to the X <a href="/wiki/Display_server" class="mw-redirect" title="Display server">display server</a> and use both XCB and Xlib, possibly through a mixture of libraries designed for one or the other.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Example">Example</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=3" title="Edit section: Example"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-highlight mw-highlight-lang-c mw-content-ltr" dir="ltr"><pre><span></span><span class="c1">// Simple XCB application for opening a window and drawing a box in it</span> <span class="c1">// To compile it using GNU, use:</span> <span class="c1">// gcc x.c -lxcb</span> <span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span> <span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdlib.h></span> <span class="cp">#include</span><span class="w"> </span><span class="cpf"><xcb/xcb.h></span> <span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> <span class="p">{</span> <span class="w"> </span><span class="n">xcb_connection_t</span><span class="w"> </span><span class="o">*</span><span class="n">c</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_screen_t</span><span class="w"> </span><span class="o">*</span><span class="n">s</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_window_t</span><span class="w"> </span><span class="n">w</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_gcontext_t</span><span class="w"> </span><span class="n">g</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_generic_event_t</span><span class="w"> </span><span class="o">*</span><span class="n">e</span><span class="p">;</span> <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">mask</span><span class="p">;</span> <span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">values</span><span class="p">[</span><span class="mi">2</span><span class="p">];</span> <span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">done</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_rectangle_t</span><span class="w"> </span><span class="n">r</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">{</span><span class="w"> </span><span class="mi">20</span><span class="p">,</span><span class="w"> </span><span class="mi">20</span><span class="p">,</span><span class="w"> </span><span class="mi">60</span><span class="p">,</span><span class="w"> </span><span class="mi">60</span><span class="w"> </span><span class="p">};</span> <span class="w"> </span><span class="c1">// open connection to the server</span> <span class="w"> </span><span class="n">c</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xcb_connect</span><span class="p">(</span><span class="nb">NULL</span><span class="p">,</span><span class="w"> </span><span class="nb">NULL</span><span class="p">);</span> <span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">xcb_connection_has_error</span><span class="p">(</span><span class="n">c</span><span class="p">))</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"Cannot open display</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span> <span class="w"> </span><span class="n">exit</span><span class="p">(</span><span class="n">EXIT_FAILURE</span><span class="p">);</span> <span class="w"> </span><span class="p">}</span> <span class="w"> </span><span class="c1">// get the first screen</span> <span class="w"> </span><span class="n">s</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xcb_setup_roots_iterator</span><span class="p">(</span><span class="w"> </span><span class="n">xcb_get_setup</span><span class="p">(</span><span class="n">c</span><span class="p">)</span><span class="w"> </span><span class="p">).</span><span class="n">data</span><span class="p">;</span> <span class="w"> </span><span class="c1">// create black graphics context</span> <span class="w"> </span><span class="n">g</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xcb_generate_id</span><span class="p">(</span><span class="n">c</span><span class="p">);</span> <span class="w"> </span><span class="n">w</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="o">-></span><span class="n">root</span><span class="p">;</span> <span class="w"> </span><span class="n">mask</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">XCB_GC_FOREGROUND</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">XCB_GC_GRAPHICS_EXPOSURES</span><span class="p">;</span> <span class="w"> </span><span class="n">values</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="o">-></span><span class="n">black_pixel</span><span class="p">;</span> <span class="w"> </span><span class="n">values</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_create_gc</span><span class="p">(</span><span class="n">c</span><span class="p">,</span><span class="w"> </span><span class="n">g</span><span class="p">,</span><span class="w"> </span><span class="n">w</span><span class="p">,</span><span class="w"> </span><span class="n">mask</span><span class="p">,</span><span class="w"> </span><span class="n">values</span><span class="p">);</span> <span class="w"> </span><span class="c1">// create window</span> <span class="w"> </span><span class="n">w</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xcb_generate_id</span><span class="p">(</span><span class="n">c</span><span class="p">);</span> <span class="w"> </span><span class="n">mask</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">XCB_CW_BACK_PIXEL</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">XCB_CW_EVENT_MASK</span><span class="p">;</span> <span class="w"> </span><span class="n">values</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">s</span><span class="o">-></span><span class="n">white_pixel</span><span class="p">;</span> <span class="w"> </span><span class="n">values</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">XCB_EVENT_MASK_EXPOSURE</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">XCB_EVENT_MASK_KEY_PRESS</span><span class="p">;</span> <span class="w"> </span><span class="n">xcb_create_window</span><span class="p">(</span><span class="n">c</span><span class="p">,</span><span class="w"> </span><span class="n">s</span><span class="o">-></span><span class="n">root_depth</span><span class="p">,</span><span class="w"> </span><span class="n">w</span><span class="p">,</span><span class="w"> </span><span class="n">s</span><span class="o">-></span><span class="n">root</span><span class="p">,</span> <span class="w"> </span><span class="mi">10</span><span class="p">,</span><span class="w"> </span><span class="mi">10</span><span class="p">,</span><span class="w"> </span><span class="mi">100</span><span class="p">,</span><span class="w"> </span><span class="mi">100</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span> <span class="w"> </span><span class="n">XCB_WINDOW_CLASS_INPUT_OUTPUT</span><span class="p">,</span><span class="w"> </span><span class="n">s</span><span class="o">-></span><span class="n">root_visual</span><span class="p">,</span> <span class="w"> </span><span class="n">mask</span><span class="p">,</span><span class="w"> </span><span class="n">values</span><span class="p">);</span> <span class="w"> </span><span class="c1">// map (show) the window</span> <span class="w"> </span><span class="n">xcb_map_window</span><span class="p">(</span><span class="n">c</span><span class="p">,</span><span class="w"> </span><span class="n">w</span><span class="p">);</span> <span class="w"> </span><span class="n">xcb_flush</span><span class="p">(</span><span class="n">c</span><span class="p">);</span> <span class="w"> </span><span class="c1">// event loop</span> <span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">done</span><span class="w"> </span><span class="o">&&</span><span class="w"> </span><span class="p">(</span><span class="n">e</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">xcb_wait_for_event</span><span class="p">(</span><span class="n">c</span><span class="p">)))</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span> <span class="w"> </span><span class="k">switch</span><span class="w"> </span><span class="p">(</span><span class="n">e</span><span class="o">-></span><span class="n">response_type</span><span class="w"> </span><span class="o">&</span><span class="w"> </span><span class="o">~</span><span class="mh">0x80</span><span class="p">)</span><span class="w"> </span><span class="p">{</span> <span class="w"> </span><span class="k">case</span><span class="w"> </span><span class="no">XCB_EXPOSE</span><span class="p">:</span><span class="w"> </span><span class="c1">// draw or redraw the window</span> <span class="w"> </span><span class="n">xcb_poly_fill_rectangle</span><span class="p">(</span><span class="n">c</span><span class="p">,</span><span class="w"> </span><span class="n">w</span><span class="p">,</span><span class="w"> </span><span class="n">g</span><span class="p">,</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">r</span><span class="p">);</span> <span class="w"> </span><span class="n">xcb_flush</span><span class="p">(</span><span class="n">c</span><span class="p">);</span> <span class="w"> </span><span class="k">break</span><span class="p">;</span> <span class="w"> </span><span class="k">case</span><span class="w"> </span><span class="no">XCB_KEY_PRESS</span><span class="p">:</span><span class="w"> </span><span class="c1">// exit on key press</span> <span class="w"> </span><span class="n">done</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="p">;</span> <span class="w"> </span><span class="k">break</span><span class="p">;</span> <span class="w"> </span><span class="p">}</span> <span class="w"> </span><span class="n">free</span><span class="p">(</span><span class="n">e</span><span class="p">);</span> <span class="w"> </span><span class="p">}</span> <span class="w"> </span><span class="c1">// close connection to server</span> <span class="w"> </span><span class="n">xcb_disconnect</span><span class="p">(</span><span class="n">c</span><span class="p">);</span> <span class="w"> </span><span class="n">exit</span><span class="p">(</span><span class="n">EXIT_SUCCESS</span><span class="p">);</span> <span class="p">}</span> </pre></div> <p>The <a href="/wiki/Bitwise_operations_in_C#Bitwise_AND_&" title="Bitwise operations in C">bitwise and</a> operation <code class="mw-highlight mw-highlight-lang-c mw-content-ltr" dir="ltr"><span class="n">a</span><span class="o">-></span><span class="n">response_type</span><span class="w"> </span><span class="o">&</span><span class="w"> </span><span class="o">~</span><span class="mh">0x80</span></code> removes a bit that indicates where the event came from.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>XCB has a comparable, but slightly lower-level API than <a href="/wiki/Xlib#Example" title="Xlib">Xlib</a>,<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> as can be seen with this example. </p> <div class="mw-heading mw-heading2"><h2 id="Protocol_description">Protocol description</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=4" title="Edit section: Protocol description"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Creators of XCB have invented a specialized <a href="/wiki/Interface_description_language" title="Interface description language">interface description language</a> to model X11 protocol in language-neutral way and facilitate generation of bindings to other programming languages.<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Accuracy_dispute#Disputed_statement" title="Wikipedia:Accuracy dispute"><span title="The material near this tag is possibly inaccurate or nonfactual. (March 2024)">dubious</span></a> – <a href="/wiki/Talk:XCB#xml_dialect_is_not_an_invention" title="Talk:XCB">discuss</a></i>]</sup> libxcb itself is implemented as a code generator and a tiny C stub of utility functions. </p><p>An example: </p> <div class="mw-highlight mw-highlight-lang-xml mw-content-ltr" dir="ltr"><pre><span></span><span class="nt"><xcb</span><span class="w"> </span><span class="na">header=</span><span class="s">"bigreq"</span><span class="w"> </span><span class="na">extension-xname=</span><span class="s">"BIG-REQUESTS"</span> <span class="w"> </span><span class="na">extension-name=</span><span class="s">"BigRequests"</span><span class="w"> </span><span class="na">extension-multiword=</span><span class="s">"true"</span> <span class="w"> </span><span class="na">major-version=</span><span class="s">"0"</span><span class="w"> </span><span class="na">minor-version=</span><span class="s">"0"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><request</span><span class="w"> </span><span class="na">name=</span><span class="s">"Enable"</span><span class="w"> </span><span class="na">opcode=</span><span class="s">"0"</span><span class="nt">></span> <span class="w"> </span><span class="nt"><reply></span> <span class="w"> </span><span class="nt"><pad</span><span class="w"> </span><span class="na">bytes=</span><span class="s">"1"</span><span class="w"> </span><span class="nt">/></span> <span class="w"> </span><span class="nt"><field</span><span class="w"> </span><span class="na">type=</span><span class="s">"CARD32"</span><span class="w"> </span><span class="na">name=</span><span class="s">"maximum_request_length"</span><span class="w"> </span><span class="nt">/></span> <span class="w"> </span><span class="nt"></reply></span> <span class="w"> </span><span class="nt"></request></span> <span class="nt"></xcb></span> </pre></div> <div class="mw-heading mw-heading2"><h2 id="Logo">Logo</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=5" title="Edit section: Logo"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The XCB logo was produced by Gearóid Molloy, author of the <a href="/wiki/Web_comic" class="mw-redirect" title="Web comic">web comic</a> <i>Neko the Kitty</i>, and donated to the project.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Other_language_bindings">Other language bindings</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=6" title="Edit section: Other language bindings"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://search.cpan.org/dist/X11-XCB/lib/X11/XCB.pm">XCB.pm</a> - Perl module implementing bindings to XCB.</li> <li><a rel="nofollow" class="external text" href="http://xcb.freedesktop.org/XcbPythonBinding/">xpyb</a> - The Python binding to the X Window System using XCB. As of June 2013, it does not support Python 3. Provided by <a href="/wiki/Freedesktop.org" title="Freedesktop.org">freedesktop.org</a>.</li> <li><a rel="nofollow" class="external text" href="https://github.com/tych0/xcffib/">xcffib</a> - Another Python binding which supports Python 2 & 3 as well as several more X extensions than xpyb.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=7" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-wikidata-2a66aa0ffffa9227d656621c2a1f0c39c62faf36-v18-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-wikidata-2a66aa0ffffa9227d656621c2a1f0c39c62faf36-v18_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://gitlab.freedesktop.org/xorg/lib/libxcb/-/tags/libxcb-1.17.0">"libxcb-1.17.0"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=libxcb-1.17.0&rft_id=https%3A%2F%2Fgitlab.freedesktop.org%2Fxorg%2Flib%2Flibxcb%2F-%2Ftags%2Flibxcb-1.17.0&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFGettysPackard2004" class="citation conference cs1">Gettys, James; Packard, Keith (2004). <a rel="nofollow" class="external text" href="https://keithp.com/~keithp/talks/xarch_ols2004/xarch_ols2004.pdf"><i>The (Re) Architecture of the X Window System</i></a> <span class="cs1-format">(PDF)</span>. Proc. Linux Symposium. Vol. 1.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=conference&rft.btitle=The+%28Re%29+Architecture+of+the+X+Window+System&rft.date=2004&rft.aulast=Gettys&rft.aufirst=James&rft.au=Packard%2C+Keith&rft_id=https%3A%2F%2Fkeithp.com%2F~keithp%2Ftalks%2Fxarch_ols2004%2Fxarch_ols2004.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFSharp2004" class="citation conference cs1">Sharp, Jamey (2004). <a rel="nofollow" class="external text" href="http://www.freedesktop.org/software/xcb/xlib_impl.pdf"><i>How Xlib is Implemented (And What We're Doing About It)</i></a> <span class="cs1-format">(PDF)</span>. Proc. Usenix Annual Techn. Conf., Freenix Track.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=conference&rft.btitle=How+Xlib+is+Implemented+%28And+What+We%27re+Doing+About+It%29&rft.date=2004&rft.aulast=Sharp&rft.aufirst=Jamey&rft_id=http%3A%2F%2Fwww.freedesktop.org%2Fsoftware%2Fxcb%2Fxlib_impl.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><a href="#refMasseyBauer2002">Massey and Bauer, 2002</a>.</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><a href="#refSharpMassey2002">Sharp and Massey, 2002</a>, §2.4. "While Xlib was designed to support threaded applications, and while that support is not unusable, there are known race conditions that cannot be eliminated without changing the Xlib interface."</span> </li> <li id="cite_note-Maloney2018-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-Maloney2018_6-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFMaloney2018" class="citation book cs1">Maloney, Ross J. (31 March 2018). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=8r1TDwAAQBAJ&dq=XCB+library&pg=PA225"><i>Low Level X Window Programming: An Introduction by Examples</i></a>. Springer. pp. <span class="nowrap">225–</span>244. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-3-319-74250-2" title="Special:BookSources/978-3-319-74250-2"><bdi>978-3-319-74250-2</bdi></a><span class="reference-accessdate">. Retrieved <span class="nowrap">17 May</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Low+Level+X+Window+Programming%3A+An+Introduction+by+Examples&rft.pages=%3Cspan+class%3D%22nowrap%22%3E225-%3C%2Fspan%3E244&rft.pub=Springer&rft.date=2018-03-31&rft.isbn=978-3-319-74250-2&rft.aulast=Maloney&rft.aufirst=Ross+J.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D8r1TDwAAQBAJ%26dq%3DXCB%2Blibrary%26pg%3DPA225&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://xcb.freedesktop.org/XlibXcb/">"Xlib/XCB: Xlib with XCB transport"</a>. 2008-01-11<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-09-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Xlib%2FXCB%3A+Xlib+with+XCB+transport&rft.date=2008-01-11&rft_id=http%3A%2F%2Fxcb.freedesktop.org%2FXlibXcb%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFJamey_Sharp_and_Josh_Triplett2006" class="citation mailinglist cs1">Jamey Sharp and Josh Triplett (2006-11-26). <a rel="nofollow" class="external text" href="http://lists.debian.org/debian-devel-announce/2006/11/msg00010.html">"libx11 with Xlib/XCB now in experimental; please test with your packages"</a>. <i>debian-devel-announce</i> (Mailing list)<span class="reference-accessdate">. Retrieved <span class="nowrap">2009-09-11</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=libx11+with+Xlib%2FXCB+now+in+experimental%3B+please+test+with+your+packages&rft.date=2006-11-26&rft.au=Jamey+Sharp+and+Josh+Triplett&rft_id=http%3A%2F%2Flists.debian.org%2Fdebian-devel-announce%2F2006%2F11%2Fmsg00010.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.x.org/releases/current/doc/xproto/x11protocol.html#event_format">"X Window System Protocol"</a>. <i>X.Org</i>. Chapter 1. Protocol Formats<span class="reference-accessdate">. Retrieved <span class="nowrap">22 March</span> 2024</span>. <q>Every event contains an 8-bit type code. The most significant bit in this code is set if the event was generated from a SendEvent request.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=X.Org&rft.atitle=X+Window+System+Protocol&rft_id=https%3A%2F%2Fwww.x.org%2Freleases%2Fcurrent%2Fdoc%2Fxproto%2Fx11protocol.html%23event_format&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span><span class="cs1-maint citation-comment"><code class="cs1-code">{{<a href="/wiki/Template:Cite_web" title="Template:Cite web">cite web</a>}}</code>: CS1 maint: location (<a href="/wiki/Category:CS1_maint:_location" title="Category:CS1 maint: location">link</a>)</span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFJamey_SharpBart_Massey2002" class="citation cs2">Jamey Sharp; Bart Massey (2002), <a rel="nofollow" class="external text" href="https://www.usenix.org/legacy/event/usenix02/tech/freenix/full_papers/sharp/sharp_html/"><i>XCL : An Xlib Compatibility Layer For XCB</i></a>, USENIX 2002 Annual Technical Conference, Freenix Track</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=XCL+%3A+An+Xlib+Compatibility+Layer+For+XCB&rft.pub=USENIX+2002+Annual+Technical+Conference%2C+Freenix+Track&rft.date=2002&rft.au=Jamey+Sharp&rft.au=Bart+Massey&rft_id=https%3A%2F%2Fwww.usenix.org%2Flegacy%2Fevent%2Fusenix02%2Ftech%2Ffreenix%2Ffull_papers%2Fsharp%2Fsharp_html%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://xcb.freedesktop.org/KittyLogo/">KittyLogo</a> (xcb.freedesktop.org)</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=8" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFMassey,_BartSharp,_Jamey2001" class="citation conference cs1">Massey, Bart; Sharp, Jamey (2001-09-19). <a rel="nofollow" class="external text" href="http://static.usenix.org/publications/library/proceedings/als01/full_papers/massey/massey.pdf">"XCB: An X Protocol C Binding"</a> <span class="cs1-format">(PDF)</span>. <i>Proceedings of the XFree86 Technical Conference</i>. Oakland, California: <a href="/wiki/USENIX" title="USENIX">USENIX</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2012-03-12</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=conference&rft.atitle=XCB%3A+An+X+Protocol+C+Binding&rft.btitle=Proceedings+of+the+XFree86+Technical+Conference&rft.place=Oakland%2C+California&rft.pub=USENIX&rft.date=2001-09-19&rft.au=Massey%2C+Bart&rft.au=Sharp%2C+Jamey&rft_id=http%3A%2F%2Fstatic.usenix.org%2Fpublications%2Flibrary%2Fproceedings%2Fals01%2Ffull_papers%2Fmassey%2Fmassey.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="refMasseyBauer2002" class="citation conference cs1">Massey, Bart; Bauer, Robert (2002). <a rel="nofollow" class="external text" href="http://www.usenix.org/events/usenix02/tech/freenix/full_papers/massey/massey_html/index.html">"X Meets Z: Verifying Correctness In The Presence Of POSIX Threads"</a>. <i>Proceedings of the FREENIX Track: 2002 USENIX Annual Technical Conference</i>. Monterey, California: <a href="/wiki/USENIX" title="USENIX">USENIX</a>. pp. <span class="nowrap">221–</span>234<span class="reference-accessdate">. Retrieved <span class="nowrap">2008-11-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=conference&rft.atitle=X+Meets+Z%3A+Verifying+Correctness+In+The+Presence+Of+POSIX+Threads&rft.btitle=Proceedings+of+the+FREENIX+Track%3A+2002+USENIX+Annual+Technical+Conference&rft.place=Monterey%2C+California&rft.pages=%3Cspan+class%3D%22nowrap%22%3E221-%3C%2Fspan%3E234&rft.pub=USENIX&rft.date=2002&rft.au=Massey%2C+Bart&rft.au=Bauer%2C+Robert&rft_id=http%3A%2F%2Fwww.usenix.org%2Fevents%2Fusenix02%2Ftech%2Ffreenix%2Ffull_papers%2Fmassey%2Fmassey_html%2Findex.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="refSharpMassey2002" class="citation conference cs1">Sharp, Jamey; Massey, Bart (2002). <a rel="nofollow" class="external text" href="http://www.usenix.org/events/usenix02/tech/freenix/full_papers/sharp/sharp_html/index.html">"XCL: A Compatibility Layer For XCB"</a>. <i>Proceedings of the FREENIX Track: 2002 USENIX Annual Technical Conference</i>. Monterey, California: <a href="/wiki/USENIX" title="USENIX">USENIX</a>. pp. <span class="nowrap">71–</span>83<span class="reference-accessdate">. Retrieved <span class="nowrap">2008-11-07</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=conference&rft.atitle=XCL%3A+A+Compatibility+Layer+For+XCB&rft.btitle=Proceedings+of+the+FREENIX+Track%3A+2002+USENIX+Annual+Technical+Conference&rft.place=Monterey%2C+California&rft.pages=%3Cspan+class%3D%22nowrap%22%3E71-%3C%2Fspan%3E83&rft.pub=USENIX&rft.date=2002&rft.au=Sharp%2C+Jamey&rft.au=Massey%2C+Bart&rft_id=http%3A%2F%2Fwww.usenix.org%2Fevents%2Fusenix02%2Ftech%2Ffreenix%2Ffull_papers%2Fsharp%2Fsharp_html%2Findex.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AXCB" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=XCB&action=edit&section=9" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style 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title="Luit">luit</a></li> <li><a href="/wiki/PackageKit" title="PackageKit">PackageKit</a></li> <li><a href="/wiki/Pkg-config" title="Pkg-config">pkg-config</a></li> <li><a href="/wiki/Systemd" title="Systemd">Systemd</a></li></ul> </div></td></tr></tbody></table><div></div></td><td class="noviewer navbox-image" rowspan="4" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:Freedesktop-logo-for-template.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Freedesktop-logo-for-template.svg/150px-Freedesktop-logo-for-template.svg.png" decoding="async" width="150" height="107" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Freedesktop-logo-for-template.svg/225px-Freedesktop-logo-for-template.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Freedesktop-logo-for-template.svg/300px-Freedesktop-logo-for-template.svg.png 2x" data-file-width="183" 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href="/wiki/Poppler_(software)" title="Poppler (software)">Poppler</a></li> <li><a href="/wiki/Swfdec" title="Swfdec">Swfdec</a></li> <li><a href="/wiki/Video_Acceleration_API" title="Video Acceleration API">Video Acceleration API</a></li> <li><a class="mw-selflink selflink">XCB</a></li> <li><a href="/wiki/Xft" title="Xft">Xft</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Software_framework" title="Software framework">Frameworks</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/CppUnit" title="CppUnit">CppUnit</a></li> <li><a href="/wiki/Open_Collaboration_Services" title="Open Collaboration Services">Open Collaboration Services (OCS)</a></li> <li><a href="/wiki/Telepathy_(software)" title="Telepathy (software)">Telepathy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Meetings</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Create_Project" title="Create Project">Create Project</a></li> <li><a href="/wiki/Portland_Project" title="Portland Project">Portland Project</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="X_Window_System153" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:XWinSys" title="Template:XWinSys"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:XWinSys" title="Template talk:XWinSys"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:XWinSys" title="Special:EditPage/Template:XWinSys"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="X_Window_System153" style="font-size:114%;margin:0 4em"><a href="/wiki/X_Window_System" title="X Window System">X Window System</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/X_Window_System_protocols_and_architecture" title="X Window System protocols and architecture">Architecture</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><b><a href="/wiki/X_Window_System_core_protocol" title="X Window System core protocol">Core protocol</a></b></li> <li><a href="/wiki/X_Window_selection" title="X Window selection">X Window selection</a></li> <li><a href="/wiki/X_Window_authorization" title="X Window authorization">X Window authorization</a></li> <li><a href="/wiki/X11_color_names" title="X11 color names">X11 color names</a></li> <li><a href="/wiki/X_Input_Method" title="X Input Method">X Input Method</a></li> <li><a href="/wiki/Wayland_(display_server_protocol)" class="mw-redirect" title="Wayland (display server protocol)">Wayland</a></li></ul> </div></td><td class="noviewer navbox-image" rowspan="5" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"><a href="/wiki/File:X11.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/95/X11.svg/120px-X11.svg.png" decoding="async" width="64" height="64" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/95/X11.svg/250px-X11.svg.png 2x" data-file-width="275" data-file-height="275" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Extensions</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/X_Image_Extension" title="X Image Extension">X Image Extension</a></li> <li><a href="/wiki/X_keyboard_extension" title="X keyboard extension">X keyboard extension</a></li> <li><a href="/wiki/RandR" class="mw-redirect" title="RandR">RandR</a></li> <li><a href="/wiki/X_Rendering_Extension" title="X Rendering Extension">X Rendering Extension</a></li> <li><a href="/wiki/Shape_extension" title="Shape extension">Shape extension</a></li> <li><a href="/wiki/MIT-SHM" title="MIT-SHM">Shared memory extension</a></li> <li><a href="/wiki/XDM_(display_manager)" title="XDM (display manager)">X Display Manager Control Protocol</a></li> <li><a href="/wiki/X_video_extension" title="X video extension">X video extension</a></li> <li><a href="/wiki/X-Video_Motion_Compensation" title="X-Video Motion Compensation">X-Video Motion Compensation</a></li> <li><a href="/wiki/AIGLX" title="AIGLX">AIGLX</a></li> <li><a href="/wiki/GLX" title="GLX">GLX</a></li> <li><a href="/wiki/Multi-Pointer_X" title="Multi-Pointer X">Multi-Pointer X</a></li> <li><a href="/wiki/Display_PostScript" title="Display PostScript">Display PostScript</a></li> <li><a href="/wiki/Composite_Extension" title="Composite Extension">Composite Extension</a></li> <li><a href="/wiki/Xinerama" title="Xinerama">Xinerama</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Components<br />and notable<br />implementations</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Display_server" class="mw-redirect" title="Display server">Display servers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><b><a href="/wiki/X.Org_Server" title="X.Org Server">X.Org Server</a></b></li> <li><a href="/wiki/Cygwin/X" title="Cygwin/X">Cygwin/X</a></li> <li><a href="/wiki/X-Win32" title="X-Win32">X-Win32</a></li> <li><a href="/wiki/X386" title="X386">X386</a></li> <li><a href="/wiki/XFree86" title="XFree86">XFree86</a></li> <li><a href="/wiki/XDarwin" title="XDarwin">XDarwin</a></li> <li><a href="/wiki/Xming" title="Xming">Xming</a></li> <li><a href="/wiki/Xsgi" title="Xsgi">Xsgi</a></li> <li><a href="/wiki/Xsun" title="Xsun">Xsun</a></li> <li><a href="/wiki/Xgl" title="Xgl">Xgl</a></li> <li><a href="/wiki/Xephyr" title="Xephyr">Xephyr</a></li> <li><a href="/wiki/XQuartz" title="XQuartz">XQuartz</a></li> <li><a href="/wiki/XWayland" class="mw-redirect" title="XWayland">XWayland</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Client libraries</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Xlib" title="Xlib">Xlib</a></li> <li><a class="mw-selflink selflink">XCB</a></li> <li><a href="/wiki/X_Toolkit_Intrinsics" title="X Toolkit Intrinsics">X Toolkit Intrinsics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/X_display_manager" title="X display manager">Display managers</a><br /><a href="/wiki/X_session_manager" title="X session manager">Session managers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GNOME_Display_Manager" title="GNOME Display Manager">GDM</a></li> <li><a href="/wiki/KDE_Display_Manager" title="KDE Display Manager">KDM</a></li> <li><a href="/wiki/Simple_Desktop_Display_Manager" title="Simple Desktop Display Manager">SDDM</a></li> <li><a href="/wiki/XDM_(display_manager)" title="XDM (display manager)">XDM</a></li> <li><a href="/wiki/LightDM" title="LightDM">LightDM</a></li> <li><a href="/wiki/LXDE" title="LXDE">LXDM</a></li> <li><a href="/wiki/Entrance_(display_manager)" title="Entrance (display manager)">Entrance</a></li> <li><a href="/wiki/WINGs_Display_Manager" class="mw-redirect" title="WINGs Display Manager">WDM</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/X_window_manager" title="X window manager">Window managers</a><br /><small>(<a href="/wiki/Comparison_of_X_window_managers" title="Comparison of X window managers">comparison</a>)</small></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Compositing_window_manager" class="mw-redirect" title="Compositing window manager">Compositing</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Compiz" title="Compiz">Compiz</a></li> <li><a href="/wiki/KWin" title="KWin">KWin</a></li> <li><a href="/wiki/Metacity" title="Metacity">Metacity</a></li> <li><a href="/wiki/Mutter_(software)" title="Mutter (software)">Mutter</a></li> <li><a href="/wiki/Xfwm" class="mw-redirect" title="Xfwm">Xfwm</a></li> <li><a href="/wiki/Enlightenment_(software)" class="mw-redirect" title="Enlightenment (software)">Enlightenment</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Stacking_window_manager" title="Stacking window manager">Stacking</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/4Dwm" class="mw-redirect" title="4Dwm">4Dwm</a></li> <li><a href="/wiki/AfterStep" title="AfterStep">AfterStep</a></li> <li><a href="/wiki/Amiwm" title="Amiwm">amiwm</a></li> <li><a href="/wiki/Blackbox" title="Blackbox">Blackbox</a></li> <li><a href="/wiki/CTWM" title="CTWM">CTWM</a></li> <li><a href="/wiki/Cwm_(window_manager)" title="Cwm (window manager)">cwm</a></li> <li><a href="/wiki/Fluxbox" title="Fluxbox">Fluxbox</a></li> <li><a href="/wiki/FLWM" title="FLWM">FLWM</a></li> <li><a href="/wiki/FVWM" title="FVWM">FVWM</a></li> <li><a href="/wiki/IceWM" title="IceWM">IceWM</a></li> <li><a href="/wiki/Matchbox_(window_manager)" title="Matchbox (window manager)">Matchbox</a></li> <li><a href="/wiki/Motif_Window_Manager" title="Motif Window Manager">mwm</a></li> <li><a href="/wiki/Olwm" title="Olwm">olwm</a></li> <li><a href="/wiki/Openbox" title="Openbox">Openbox</a></li> <li><a href="/wiki/Qvwm" title="Qvwm">Qvwm</a></li> <li><a href="/wiki/Sawfish_(window_manager)" title="Sawfish (window manager)">Sawfish</a></li> <li><a href="/wiki/Swm" title="Swm">swm</a></li> <li><a href="/wiki/Tvtwm" title="Tvtwm">tvtwm</a></li> <li><a href="/wiki/Twm" title="Twm">twm</a></li> <li><a href="/wiki/Vtwm" title="Vtwm">vtwm</a></li> <li><a href="/wiki/WindowLab" title="WindowLab">WindowLab</a></li> <li><a href="/wiki/Window_Maker" class="mw-redirect" title="Window Maker">Window Maker</a></li> <li><a href="/wiki/Wm2" title="Wm2">wm2</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Tiling_window_manager" title="Tiling window manager">Tiling</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Awesome_(window_manager)" title="Awesome (window manager)">awesome</a></li> <li><a href="/wiki/Dwm" title="Dwm">dwm</a></li> <li><a href="/wiki/I3_(window_manager)" title="I3 (window manager)">i3</a></li> <li><a href="/wiki/Ion_(window_manager)" title="Ion (window manager)">Ion</a></li> <li><a href="/wiki/Ratpoison" title="Ratpoison">ratpoison</a></li> <li><a href="/wiki/Wmii" class="mw-redirect" title="Wmii">wmii</a></li> <li><a href="/wiki/Xmonad" title="Xmonad">xmonad</a></li> <li><a href="/wiki/StumpWM" class="mw-redirect" title="StumpWM">StumpWM</a></li> <li><a href="/wiki/Larswm" title="Larswm">larswm</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Standards</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Inter-Client_Communication_Conventions_Manual" title="Inter-Client Communication Conventions Manual">ICCCM</a></li> <li><a href="/wiki/Extended_Window_Manager_Hints" class="mw-redirect" title="Extended Window Manager Hints">EWMH</a></li> <li><a href="/wiki/Direct_Save_Protocol" class="mw-redirect" title="Direct Save Protocol">XDS</a></li> <li><a href="/wiki/Freedesktop.org" title="Freedesktop.org">freedesktop.org</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Applications</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Xcalc" class="mw-redirect" title="Xcalc">xcalc</a></li> <li><a href="/wiki/Xclock" class="mw-redirect" title="Xclock">xclock</a></li> <li><a href="/wiki/Xedit_(X11)" class="mw-redirect" title="Xedit (X11)">xedit</a></li> <li><a href="/wiki/Xload" class="mw-redirect" title="Xload">xload</a></li> <li><a href="/wiki/Xterm" title="Xterm">xterm</a></li> <li><a href="/wiki/Xeyes" class="mw-redirect" title="Xeyes">xeyes</a></li> <li><a href="/wiki/Comparison_of_X_Window_System_desktop_environments" title="Comparison of X Window System desktop environments">Desktop environments (comparison)</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="List_of_widget_toolkits573" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Widget_toolkits" title="Template:Widget toolkits"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Widget_toolkits" title="Template talk:Widget toolkits"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Widget_toolkits" title="Special:EditPage/Template:Widget toolkits"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="List_of_widget_toolkits573" style="font-size:114%;margin:0 4em"><a href="/wiki/List_of_widget_toolkits" title="List of widget toolkits">List</a> of <a href="/wiki/Widget_toolkit" title="Widget toolkit">widget toolkits</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"><b>Low-level platform-specific</b></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/AmigaOS" title="AmigaOS">AmigaOS</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Intuition_(Amiga)" title="Intuition (Amiga)">Intuition</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Classic_Mac_OS" title="Classic Mac OS">Classic Mac OS</a>, <a href="/wiki/MacOS" title="MacOS">macOS</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Macintosh_Toolbox" title="Macintosh Toolbox">Macintosh Toolbox</a></li> <li><a href="/wiki/Carbon_(API)" title="Carbon (API)">Carbon</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Windows</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Windows_API" title="Windows API">Windows API</a></li> <li><a href="/wiki/Universal_Windows_Platform" title="Universal Windows Platform">UWP</a> <ul><li><a href="/wiki/Windows_Runtime" title="Windows Runtime">WinRT</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Unix" title="Unix">Unix</a>,<br />under <a href="/wiki/X_Window_System" title="X Window System">X11</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Xlib" title="Xlib">Xlib</a></li> <li><a class="mw-selflink selflink">XCB</a></li> <li><a href="/wiki/X_Toolkit_Intrinsics" title="X Toolkit Intrinsics">X Toolkit Intrinsics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/BeOS" title="BeOS">BeOS</a>, <a href="/wiki/Haiku_(operating_system)" title="Haiku (operating system)">Haiku</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BeOS_API" class="mw-redirect" title="BeOS API">BeOS API</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Android_(operating_system)" title="Android (operating system)">Android</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="CLI38" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">CLI</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Mono_(software)#Xamarin.Android" title="Mono (software)">Xamarin.Android</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"><b>Low Level Cross-platform</b></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">CLI</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/OpenTK" title="OpenTK">OpenTK</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/C_(programming_language)" title="C (programming language)">C</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GDK" title="GDK">GDK</a></li> <li><a href="/wiki/Simple_DirectMedia_Layer" title="Simple DirectMedia Layer">Simple DirectMedia Layer</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Java_OpenGL" title="Java OpenGL">JOGL</a></li> <li><a href="/wiki/Lightweight_Java_Game_Library" class="mw-redirect" title="Lightweight Java Game Library">LWJGL</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"><b>High-level, platform-specific</b></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/AmigaOS" title="AmigaOS">AmigaOS</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/BOOPSI" title="BOOPSI">BOOPSI</a></li> <li><a href="/wiki/Magic_User_Interface" title="Magic User Interface">MUI</a></li> <li><a href="/wiki/ReAction_GUI" title="ReAction GUI">ReAction GUI</a></li> <li><a href="/wiki/Zune_(widget_toolkit)" title="Zune (widget toolkit)">Zune</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Classic_Mac_OS" title="Classic Mac OS">Classic Mac OS</a>, <a href="/wiki/MacOS" title="MacOS">macOS</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Object_Pascal" title="Object Pascal">Object Pascal</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/MacApp" title="MacApp">MacApp</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Objective-C" title="Objective-C">Objective-C</a>, <a href="/wiki/Swift_(programming_language)" title="Swift (programming language)">Swift</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cocoa_(API)" title="Cocoa (API)">Cocoa</a></li> <li><a href="/wiki/Cocoa_Touch" class="mw-redirect" title="Cocoa Touch">Cocoa Touch</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/C%2B%2B" title="C++">C++</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/MacApp" title="MacApp">MacApp</a></li> <li><a href="/wiki/PowerPlant" title="PowerPlant">PowerPlant</a></li> <li><a href="/wiki/THINK_C" title="THINK C">THINK C</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">CLI</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Xamarin#Xamarin.Mac" title="Xamarin">Xamarin.Mac</a></li> <li><a href="/wiki/Mono_(software)#Xamarin.iOS" title="Mono (software)">Xamarin.iOS</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Microsoft_Windows" title="Microsoft Windows">Windows</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">CLI</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Windows_Forms" title="Windows Forms">Windows Forms</a></li> <li><a href="/wiki/Extensible_Application_Markup_Language" title="Extensible Application Markup Language">XAML</a> <ul><li><a href="/wiki/Windows_Presentation_Foundation" title="Windows Presentation Foundation">Windows Presentation Foundation</a></li> <li><a href="/wiki/Windows_UI_Library" title="Windows UI Library">Windows UI Library</a></li> <li><a href="/wiki/Microsoft_Silverlight" title="Microsoft Silverlight">Silverlight</a></li></ul></li> <li><a href="/wiki/Microsoft_XNA" title="Microsoft XNA">Microsoft XNA</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/C%2B%2B" title="C++">C++</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Microsoft_Foundation_Class_Library" title="Microsoft Foundation Class Library">MFC</a></li> <li><a href="/wiki/Active_Template_Library" title="Active Template Library">Active Template Library</a></li> <li><a href="/wiki/Windows_Template_Library" title="Windows Template Library">Windows Template Library</a></li> <li><a href="/wiki/Object_Windows_Library" title="Object Windows Library">Object Windows Library</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Object_Pascal" title="Object Pascal">Object Pascal</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Visual_Component_Library" title="Visual Component Library">Visual Component Library</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Unix" title="Unix">Unix</a>,<br />under <a href="/wiki/X_Window_System" title="X Window System">X11</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/X_Athena_Widgets" title="X Athena Widgets">Athena (Xaw)</a></li> <li><a href="/wiki/LessTif" title="LessTif">LessTif</a></li> <li><a href="/wiki/Motif_(software)" title="Motif (software)">Motif</a></li> <li><a href="/wiki/OLIT" title="OLIT">OLIT</a></li> <li><a href="/wiki/XForms_(toolkit)" title="XForms (toolkit)">XForms</a></li> <li><a href="/wiki/XView" title="XView">XView</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">On <a href="/wiki/Android_(operating_system)" title="Android (operating system)">Android</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Android_software_development#Qt_for_Android" title="Android software development">Qt for Android</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"><b>High-level, cross-platform</b></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/C_(programming_language)" title="C (programming language)">C</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Enlightenment_Foundation_Libraries" title="Enlightenment Foundation Libraries">Enlightenment Foundation Libraries</a></li> <li><a href="/wiki/GTK" title="GTK">GTK</a></li> <li><a href="/wiki/IUP_(software)" title="IUP (software)">IUP</a></li> <li><a href="/wiki/XForms_(toolkit)" title="XForms (toolkit)">XForms</a></li> <li><a href="/wiki/XVT" title="XVT">XVT</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/C%2B%2B" title="C++">C++</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bedrock_(framework)" title="Bedrock (framework)">Bedrock</a></li> <li><a href="/wiki/CEGUI" title="CEGUI">CEGUI</a></li> <li><a href="/wiki/Component_Library_for_Cross_Platform" title="Component Library for Cross Platform">Component Library for Cross Platform</a></li> <li><a href="/wiki/FLTK" title="FLTK">FLTK</a></li> <li><a href="/wiki/Fox_toolkit" title="Fox toolkit">FOX toolkit</a></li> <li><a href="/wiki/OpenGL_User_Interface_Library" class="mw-redirect" title="OpenGL User Interface Library">OpenGL User Interface Library</a></li> <li><a href="/wiki/Gtkmm" title="Gtkmm">gtkmm</a></li> <li><a href="/wiki/JUCE" title="JUCE">JUCE</a></li> <li><a href="/wiki/Qt_(software)" title="Qt (software)">Qt</a></li> <li><a href="/wiki/Rogue_Wave_Software" title="Rogue Wave Software">Rogue Wave Views</a></li> <li><a href="/wiki/TnFOX" class="mw-redirect" title="TnFOX">TnFOX</a></li> <li><a href="/wiki/Ultimate%2B%2B" title="Ultimate++">U++</a></li> <li><a href="/wiki/Wt_(web_toolkit)" title="Wt (web toolkit)">Wt</a></li> <li><a href="/wiki/WxWidgets" title="WxWidgets">wxWidgets</a></li> <li><a href="/wiki/Simple_and_Fast_Multimedia_Library" title="Simple and Fast Multimedia Library">Simple and Fast Multimedia Library</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Objective-C" title="Objective-C">Objective-C</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/GNUstep" title="GNUstep">GNUstep</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">CLI</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gtk_Sharp" class="mw-redirect" title="Gtk Sharp">Gtk#</a></li> <li><a href="/wiki/Tao_Framework" title="Tao Framework">Tao Framework</a> <ul><li><a href="/wiki/OpenTK" title="OpenTK">OpenTK</a></li></ul></li> <li><a href="/wiki/UIML" title="UIML">UIML</a></li> <li><a href="/wiki/MonoGame" title="MonoGame">MonoGame</a></li> <li><a href="/wiki/Moonlight_(runtime)" title="Moonlight (runtime)">Moonlight</a></li> <li><a href="/wiki/Xamarin#Xamarin.Forms" title="Xamarin">Xamarin.Forms</a></li> <li><a href="/w/index.php?title=XWT_(Mono)&action=edit&redlink=1" class="new" title="XWT (Mono) (page does not exist)">XWT</a><a rel="nofollow" class="external autonumber" href="https://www.mono-project.com/docs/gui/#xwt">[1]</a><a rel="nofollow" class="external autonumber" href="https://github.com/mono/xwt">[2]</a></li> <li><a href="/wiki/.NET#.NET_MAUI" title=".NET">.NET MAUI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Adobe_Flash" title="Adobe Flash">Adobe Flash</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Apache_Flex" title="Apache Flex">Apache Flex</a> <ul><li><a href="/wiki/MXML" title="MXML">MXML</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Go_(programming_language)" title="Go (programming language)">Go</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Fyne_(software)" title="Fyne (software)">Fyne</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Haskell" title="Haskell">Haskell</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/WxHaskell" title="WxHaskell">wxHaskell</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Abstract_Window_Toolkit" title="Abstract Window Toolkit">Abstract Window Toolkit</a></li> <li><a href="/wiki/FXML" title="FXML">FXML</a></li> <li><a href="/wiki/JavaFX" title="JavaFX">JavaFX</a></li> <li><a href="/wiki/Qt_Jambi" class="mw-redirect" title="Qt Jambi">Qt Jambi</a></li> <li><a href="/wiki/Swing_(Java)" title="Swing (Java)">Swing</a></li> <li><a href="/wiki/Standard_Widget_Toolkit" title="Standard Widget Toolkit">Standard Widget Toolkit</a></li> <li><a href="/wiki/Google_Web_Toolkit" title="Google Web Toolkit">Google Web Toolkit</a></li> <li><a href="/wiki/Lightweight_User_Interface_Toolkit" title="Lightweight User Interface Toolkit">Lightweight User Interface Toolkit</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/JavaScript" title="JavaScript">JavaScript</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dojo_Toolkit" title="Dojo Toolkit">Dojo Toolkit</a></li> <li><a href="/wiki/Echo_(framework)" title="Echo (framework)">Echo</a></li> <li><a href="/wiki/Ext_JS" title="Ext JS">Ext JS</a></li> <li><a href="/wiki/Google_Closure_Tools" title="Google Closure Tools">Google Closure Tools</a></li> <li><a href="/wiki/JQuery_UI" title="JQuery UI">jQuery UI</a></li> <li><a href="/wiki/OpenUI5" title="OpenUI5">OpenUI5</a></li> <li><a href="/wiki/Qooxdoo" title="Qooxdoo">Qooxdoo</a></li> <li><a href="/wiki/YUI_Library" title="YUI Library">YUI</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Common_Lisp" title="Common Lisp">Common Lisp</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/LispWorks" title="LispWorks">CAPI</a></li> <li><a href="/wiki/Common_Lisp_Interface_Manager" title="Common Lisp Interface Manager">CLIM</a></li> <li><a href="/wiki/Allegro_Common_Lisp" title="Allegro Common Lisp">Common Graphics</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lua_(programming_language)" title="Lua (programming language)">Lua</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/IUP_(software)" title="IUP (software)">IUP</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Pascal_(programming_language)" title="Pascal (programming language)">Pascal</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Lazarus_Component_Library" title="Lazarus Component Library">Lazarus Component Library</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Object_Pascal" title="Object Pascal">Object Pascal</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Component_Library_for_Cross_Platform" title="Component Library for Cross Platform">Component Library for Cross Platform</a></li> <li><a href="/wiki/FpGUI" title="FpGUI">fpGUI</a></li> <li><a href="/wiki/IP_Pascal" title="IP Pascal">IP Pascal</a></li> <li><a href="/wiki/FireMonkey" title="FireMonkey">FireMonkey</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Perl" title="Perl">Perl</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Perl/<a href="/wiki/Tk_(software)" title="Tk (software)">Tk</a></li> <li><a href="/wiki/WxPerl" class="mw-redirect" title="WxPerl">wxPerl</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/PHP" title="PHP">PHP</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/PHP-GTK" title="PHP-GTK">PHP-GTK</a></li> <li><a href="/wiki/WxPHP" title="WxPHP">wxPHP</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Python_(programming_language)" title="Python (programming language)">Python</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Tkinter" title="Tkinter">Tkinter</a></li> <li><a href="/wiki/Kivy_(framework)" title="Kivy (framework)">Kivy</a></li> <li><a href="/wiki/PySide" title="PySide">PySide</a></li> <li><a href="/wiki/PyQt" title="PyQt">PyQt</a></li> <li><a href="/wiki/PyGTK" title="PyGTK">PyGTK</a></li> <li><a href="/wiki/WxPython" title="WxPython">wxPython</a></li> <li><a href="/wiki/Pyjs" title="Pyjs">Pyjs</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Ruby_(programming_language)" title="Ruby (programming language)">Ruby</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Shoes_(GUI_toolkit)" class="mw-redirect" title="Shoes (GUI toolkit)">Shoes</a></li> <li><a href="/wiki/QtRuby" class="mw-redirect" title="QtRuby">QtRuby</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Tcl" title="Tcl">Tcl</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Tk_(software)" title="Tk (software)">Tcl/Tk</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/XML" title="XML">XML</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Glade_Interface_Designer" title="Glade Interface Designer">GladeXML</a></li> <li><a href="/wiki/Lively_Kernel" title="Lively Kernel">Lively Kernel</a></li> <li><a href="/wiki/Extensible_Application_Markup_Language" title="Extensible Application Markup Language">Extensible Application Markup Language</a></li> <li><a href="/wiki/XUL" title="XUL">XUL</a></li> <li><a href="/wiki/Wt_(web_toolkit)" title="Wt (web toolkit)">Wt</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" 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