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/* ========================================================================== HTML5 display definitions ========================================================================== */
/** Correct `block` display not defined in IE 8/9. */
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/** Correct `inline-block` display not defined in IE 8/9. */
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/** Prevent modern browsers from displaying `audio` without controls. Remove excess height in iOS 5 devices. */
audio:not([controls]) { display: none; height: 0; }

/** Address `[hidden]` styling not present in IE 8/9. Hide the `template` element in IE, Safari, and Firefox < 22. */
[hidden], template { display: none; }

script { display: none !important; }

/* ========================================================================== Base ========================================================================== */
/** 1. Set default font family to sans-serif. 2. Prevent iOS text size adjust after orientation change, without disabling user zoom. */
html { font-family: sans-serif; /* 1 */ -ms-text-size-adjust: 100%; /* 2 */ -webkit-text-size-adjust: 100%; /* 2 */ }

/** Remove default margin. */
body { margin: 0; }

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/** Remove the gray background color from active links in IE 10. */
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/** Address `outline` inconsistency between Chrome and other browsers. */
a:focus { outline: thin dotted; }

/** Improve readability when focused and also mouse hovered in all browsers. */
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/* ========================================================================== Typography ========================================================================== */
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/** Address styling not present in IE 8/9, Safari 5, and Chrome. */
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/** Address style set to `bolder` in Firefox 4+, Safari 5, and Chrome. */
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/** Address styling not present in Safari 5 and Chrome. */
dfn { font-style: italic; }

/** Address differences between Firefox and other browsers. */
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/** Address styling not present in IE 8/9. */
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/** Correct font family set oddly in Safari 5 and Chrome. */
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/** Set consistent quote types. */
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/** Address inconsistent and variable font size in all browsers. */
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/** Correct overflow displayed oddly in IE 9. */
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/** Address margin not present in IE 8/9 and Safari 5. */
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/** 1. Correct `color` not being inherited in IE 8/9. 2. Remove padding so people aren't caught out if they zero out fieldsets. */
legend { border: 0; /* 1 */ padding: 0; /* 2 */ }

/** 1. Correct font family not being inherited in all browsers. 2. Correct font size not being inherited in all browsers. 3. Address margins set differently in Firefox 4+, Safari 5, and Chrome. */
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/** Address Firefox 4+ setting `line-height` on `input` using `!important` in the UA stylesheet. */
button, input { line-height: normal; }

/** Address inconsistent `text-transform` inheritance for `button` and `select`. All other form control elements do not inherit `text-transform` values. Correct `button` style inheritance in Chrome, Safari 5+, and IE 8+. Correct `select` style inheritance in Firefox 4+ and Opera. */
button, select { text-transform: none; }

/** 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio` and `video` controls. 2. Correct inability to style clickable `input` types in iOS. 3. Improve usability and consistency of cursor style between image-type `input` and others. */
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/** Re-set default cursor for disabled elements. */
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/** 1. Address box sizing set to `content-box` in IE 8/9. 2. Remove excess padding in IE 8/9. */
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/** 1. Address `appearance` set to `searchfield` in Safari 5 and Chrome. 2. Address `box-sizing` set to `border-box` in Safari 5 and Chrome (include `-moz` to future-proof). */
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/** Remove inner padding and search cancel button in Safari 5 and Chrome on OS X. */
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/** Remove inner padding and border in Firefox 4+. */
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/** Remove most spacing between table cells. */
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img { display: inline-block; vertical-align: middle; }

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select { width: 100%; }

object, svg { display: inline-block; vertical-align: middle; }

.center { margin-left: auto; margin-right: auto; }

.spread { width: 100%; }

p.lead, .paragraph.lead > p, #preamble > .sectionbody > .paragraph:first-of-type p { font-size: 1.21875em; line-height: 1.6; }

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h2 { font-size: 1.6875em; }

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h4 { font-size: 1.125em; }

h5 { font-size: 1.125em; }

h6 { font-size: 1em; }

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ul, ol { margin-left: 1.5em; }
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ul.square { list-style-type: square; }
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ol li ul, ol li ol { margin-left: 1.25em; margin-bottom: 0; }

/* Definition Lists */
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dl dd { margin-bottom: 0.75em; }

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abbr { text-transform: none; }

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blockquote cite { display: block; font-size: 0.8125em; color: #5e93b8; }
blockquote cite:before { content: "\2014 \0020"; }
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blockquote, blockquote p { line-height: 1.6; color: #333333; }

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.vevent .summary { font-weight: bold; }
.vevent abbr { cursor: auto; text-decoration: none; font-weight: bold; border: none; padding: 0 0.0625em; }

@media only screen and (min-width: 768px) { h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { line-height: 1.4; }
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table { background: white; margin-bottom: 1.25em; border: solid 1px #d8d8ce; }
table thead, table tfoot { background: -webkit-linear-gradient(top, #add386, #90b66a); font-weight: bold; }
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table tr th, table tr td { padding: 0.5625em 0.625em; font-size: inherit; color: #6d6e71; }
table tr.even, table tr.alt, table tr:nth-of-type(even) { background: #edf2f2; }
table thead tr th, table tfoot tr th, table tbody tr td, table tr td, table tfoot tr td { display: table-cell; line-height: 1.4; }

body { -moz-osx-font-smoothing: grayscale; -webkit-font-smoothing: antialiased; tab-size: 4; }

h1, h2, h3, #toctitle, .sidebarblock > .content > .title, h4, h5, h6 { line-height: 1.4; }

a:hover, a:focus { text-decoration: underline; }

.clearfix:before, .clearfix:after, .float-group:before, .float-group:after { content: " "; display: table; }
.clearfix:after, .float-group:after { clear: both; }

*:not(pre) > code { font-size: inherit; font-style: normal !important; letter-spacing: 0; padding: 0; background-color: white; -webkit-border-radius: 0; border-radius: 0; line-height: inherit; word-wrap: break-word; }
*:not(pre) > code.nobreak { word-wrap: normal; }
*:not(pre) > code.nowrap { white-space: nowrap; }

pre, pre > code { line-height: 1.6; color: #264357; font-family: Consolas, "Liberation Mono", Courier, monospace; font-weight: normal; }

em em { font-style: normal; }

strong strong { font-weight: normal; }

.keyseq { color: #333333; }

kbd { font-family: Consolas, "Liberation Mono", Courier, monospace; display: inline-block; color: black; font-size: 0.65em; line-height: 1.45; background-color: #f7f7f7; border: 1px solid #ccc; -webkit-border-radius: 3px; border-radius: 3px; -webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 0.1em white inset; box-shadow: 0 1px 0 rgba(0, 0, 0, 0.2), 0 0 0 0.1em white inset; margin: 0 0.15em; padding: 0.2em 0.5em; vertical-align: middle; position: relative; top: -0.1em; white-space: nowrap; }

.keyseq kbd:first-child { margin-left: 0; }

.keyseq kbd:last-child { margin-right: 0; }

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.menuseq { word-spacing: -0.02em; }
.menuseq b.caret { font-size: 1.25em; line-height: 0.8; }
.menuseq i.caret { font-weight: bold; text-align: center; width: 0.45em; }

b.button:before, b.button:after { position: relative; top: -1px; font-weight: normal; }

b.button:before { content: "["; padding: 0 3px 0 2px; }

b.button:after { content: "]"; padding: 0 2px 0 3px; }

#header, #content, #footnotes, #footer { width: 100%; margin-left: auto; margin-right: auto; margin-top: 0; margin-bottom: 0; max-width: 62.5em; *zoom: 1; position: relative; padding-left: 1.5em; padding-right: 1.5em; }
#header:before, #header:after, #content:before, #content:after, #footnotes:before, #footnotes:after, #footer:before, #footer:after { content: " "; display: table; }
#header:after, #content:after, #footnotes:after, #footer:after { clear: both; }

#content { margin-top: 1.25em; }

#content:before { content: none; }

#header > h1:first-child { color: black; margin-top: 2.25rem; margin-bottom: 0; }
#header > h1:first-child + #toc { margin-top: 8px; border-top: 1px solid #dddddd; }
#header > h1:only-child, body.toc2 #header > h1:nth-last-child(2) { border-bottom: 1px solid #dddddd; padding-bottom: 8px; }
#header .details { border-bottom: 1px solid #dddddd; line-height: 1.45; padding-top: 0.25em; padding-bottom: 0.25em; padding-left: 0.25em; color: #5e93b8; display: -ms-flexbox; display: -webkit-flex; display: flex; -ms-flex-flow: row wrap; -webkit-flex-flow: row wrap; flex-flow: row wrap; }
#header .details span:first-child { margin-left: -0.125em; }
#header .details span.email a { color: #333333; }
#header .details br { display: none; }
#header .details br + span:before { content: "\00a0\2013\00a0"; }
#header .details br + span.author:before { content: "\00a0\22c5\00a0"; color: #333333; }
#header .details br + span#revremark:before { content: "\00a0|\00a0"; }
#header #revnumber { text-transform: capitalize; }
#header #revnumber:after { content: "\00a0"; }

#content > h1:first-child:not([class]) { color: black; border-bottom: 1px solid #dddddd; padding-bottom: 8px; margin-top: 0; padding-top: 1rem; margin-bottom: 1.25rem; }

#toc { border-bottom: 0 solid #dddddd; padding-bottom: 0.5em; }
#toc > ul { margin-left: 0.125em; }
#toc ul.sectlevel0 > li > a { font-style: italic; }
#toc ul.sectlevel0 ul.sectlevel1 { margin: 0.5em 0; }
#toc ul { font-family: Noto, sans-serif; list-style-type: none; }
#toc li { line-height: 1.3334; margin-top: 0.3334em; }
#toc a { text-decoration: none; }
#toc a:active { text-decoration: underline; }

#toctitle { color: black; font-size: 1.2em; }

@media only screen and (min-width: 768px) { #toctitle { font-size: 1.375em; }
  body.toc2 { padding-left: 15em; padding-right: 0; }
  #toc.toc2 { margin-top: 0 !important; background-color: white; position: fixed; width: 15em; left: 0; top: 0; border-right: 1px solid #dddddd; border-top-width: 0 !important; border-bottom-width: 0 !important; z-index: 1000; padding: 1.25em 1em; height: 100%; overflow: auto; }
  #toc.toc2 #toctitle { margin-top: 0; margin-bottom: 0.8rem; font-size: 1.2em; }
  #toc.toc2 > ul { font-size: 0.9em; margin-bottom: 0; }
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  body.toc2.toc-right { padding-left: 0; padding-right: 15em; }
  body.toc2.toc-right #toc.toc2 { border-right-width: 0; border-left: 1px solid #dddddd; left: auto; right: 0; } }
@media only screen and (min-width: 1280px) { body.toc2 { padding-left: 20em; padding-right: 0; }
  #toc.toc2 { width: 20em; }
  #toc.toc2 #toctitle { font-size: 1.375em; }
  #toc.toc2 > ul { font-size: 0.95em; }
  #toc.toc2 ul ul { padding-left: 1.25em; }
  body.toc2.toc-right { padding-left: 0; padding-right: 20em; } }
#content #toc { border-style: solid; border-width: 1px; border-color: #e6e6e6; margin-bottom: 1.25em; padding: 1.25em; background: white; -webkit-border-radius: 0; border-radius: 0; }
#content #toc > :first-child { margin-top: 0; }
#content #toc > :last-child { margin-bottom: 0; }

#footer { max-width: 100%; background-color: none; padding: 1.25em; }

#footer-text { color: black; line-height: 1.44; }

#content { margin-bottom: 0.625em; }

.sect1 { padding-bottom: 0.625em; }

@media only screen and (min-width: 768px) { #content { margin-bottom: 1.25em; }
  .sect1 { padding-bottom: 1.25em; } }
.sect1:last-child { padding-bottom: 0; }

.sect1 + .sect1 { border-top: 0 solid #dddddd; }

#content h1 > a.anchor, h2 > a.anchor, h3 > a.anchor, #toctitle > a.anchor, .sidebarblock > .content > .title > a.anchor, h4 > a.anchor, h5 > a.anchor, h6 > a.anchor { position: absolute; z-index: 1001; width: 1.5ex; margin-left: -1.5ex; display: block; text-decoration: none !important; visibility: hidden; text-align: center; font-weight: normal; }
#content h1 > a.anchor:before, h2 > a.anchor:before, h3 > a.anchor:before, #toctitle > a.anchor:before, .sidebarblock > .content > .title > a.anchor:before, h4 > a.anchor:before, h5 > a.anchor:before, h6 > a.anchor:before { content: "\00A7"; font-size: 0.85em; display: block; padding-top: 0.1em; }
#content h1:hover > a.anchor, #content h1 > a.anchor:hover, h2:hover > a.anchor, h2 > a.anchor:hover, h3:hover > a.anchor, #toctitle:hover > a.anchor, .sidebarblock > .content > .title:hover > a.anchor, h3 > a.anchor:hover, #toctitle > a.anchor:hover, .sidebarblock > .content > .title > a.anchor:hover, h4:hover > a.anchor, h4 > a.anchor:hover, h5:hover > a.anchor, h5 > a.anchor:hover, h6:hover > a.anchor, h6 > a.anchor:hover { visibility: visible; }
#content h1 > a.link, h2 > a.link, h3 > a.link, #toctitle > a.link, .sidebarblock > .content > .title > a.link, h4 > a.link, h5 > a.link, h6 > a.link { color: black; text-decoration: none; }
#content h1 > a.link:hover, h2 > a.link:hover, h3 > a.link:hover, #toctitle > a.link:hover, .sidebarblock > .content > .title > a.link:hover, h4 > a.link:hover, h5 > a.link:hover, h6 > a.link:hover { color: black; }

.audioblock, .imageblock, .literalblock, .listingblock, .stemblock, .videoblock { margin-bottom: 1.25em; }

.admonitionblock td.content > .title, .audioblock > .title, .exampleblock > .title, .imageblock > .title, .listingblock > .title, .literalblock > .title, .stemblock > .title, .openblock > .title, .paragraph > .title, .quoteblock > .title, table.tableblock > .title, .verseblock > .title, .videoblock > .title, .dlist > .title, .olist > .title, .ulist > .title, .qlist > .title, .hdlist > .title { text-rendering: optimizeLegibility; text-align: left; }

table.tableblock > caption.title { white-space: nowrap; overflow: visible; max-width: 0; }

.paragraph.lead > p, #preamble > .sectionbody > .paragraph:first-of-type p { color: black; }

table.tableblock #preamble > .sectionbody > .paragraph:first-of-type p { font-size: inherit; }

.admonitionblock > table { border-collapse: separate; border: 0; background: none; width: 100%; }
.admonitionblock > table td.icon { text-align: center; width: 80px; }
.admonitionblock > table td.icon img { max-width: initial; }
.admonitionblock > table td.icon .title { font-weight: bold; font-family: Noto, sans-serif; text-transform: uppercase; }
.admonitionblock > table td.content { padding-left: 1.125em; padding-right: 1.25em; border-left: 1px solid #dddddd; color: #5e93b8; }
.admonitionblock > table td.content > :last-child > :last-child { margin-bottom: 0; }

.exampleblock > .content { border-style: solid; border-width: 1px; border-color: #e6e6e6; margin-bottom: 1.25em; padding: 1.25em; background: white; -webkit-border-radius: 0; border-radius: 0; }
.exampleblock > .content > :first-child { margin-top: 0; }
.exampleblock > .content > :last-child { margin-bottom: 0; }

.sidebarblock { border-style: solid; border-width: 1px; border-color: #e6e6e6; margin-bottom: 1.25em; padding: 1.25em; background: white; -webkit-border-radius: 0; border-radius: 0; }
.sidebarblock > :first-child { margin-top: 0; }
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<body class="book">
<div id="header">
<h1>cl_intel_sharing_format_query</h1>
<div class="details">
<span id="revnumber">version v3.0.8,</span>
<span id="revdate">Wed, 30 Jun 2021 22:00:00 +0000</span>
<br><span id="revremark">from git branch: master commit: 09130de814688ec7b463cb089986b807c628ead3</span>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_name_strings"><a class="anchor" href="#_name_strings"></a>Name Strings</h2>
<div class="sectionbody">
<div class="paragraph">
<p><code>cl_intel_sharing_format_query</code></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_contact"><a class="anchor" href="#_contact"></a>Contact</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Ben Ashbaugh, Intel (ben 'dot' ashbaugh 'at' intel 'dot' com)</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_contributors"><a class="anchor" href="#_contributors"></a>Contributors</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Ben Ashbaugh, Intel<br>
Jacek Danecki, Intel<br>
Mateusz Hoppe, Intel<br>
Krzysztof Laskowski, Intel<br>
Eric Palmer, Intel<br>
Pawel Wilma, Intel</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_notice"><a class="anchor" href="#_notice"></a>Notice</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Copyright (c) 2021 Intel Corporation.  All rights reserved.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_status"><a class="anchor" href="#_status"></a>Status</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Shipping</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_version"><a class="anchor" href="#_version"></a>Version</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Built On: 2021-06-30<br>
Revision: 1.0.0</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_dependencies"><a class="anchor" href="#_dependencies"></a>Dependencies</h2>
<div class="sectionbody">
<div class="paragraph">
<p>This extension depends on and modifies one or more of the following interop / sharing extensions:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>cl_khr_gl_sharing</code></p>
</li>
<li>
<p><code>cl_khr_dx9_media_sharing</code></p>
</li>
<li>
<p><code>cl_khr_d3d10_sharing</code></p>
</li>
<li>
<p><code>cl_khr_d3d11_sharing</code></p>
</li>
<li>
<p><code>cl_intel_dx9_media_sharing</code></p>
</li>
<li>
<p><code>cl_intel_va_api_media_sharing</code></p>
</li>
</ul>
</div>
<div class="paragraph">
<p>This extension is written against the OpenCL Extension specification v3.0.7, which describes <code>cl_khr_gl_sharing</code>, <code>cl_khr_dx9_media_sharing</code>, <code>cl_khr_d3d10_sharing</code>, and <code>cl_khr_d3d11_sharing</code>.
This extension is written against version 6 of the <code>cl_intel_dx9_media_sharing</code> specification and against version 1 of the <code>cl_intel_va_api_media_sharing</code> specification.</p>
</div>
<div class="paragraph">
<p>This extension does not make any changes to the core OpenCL API specification or the OpenCL C specification.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_overview"><a class="anchor" href="#_overview"></a>Overview</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Existing interop / sharing extensions require support for a minimum set of image formats, however many OpenCL implementations may support sharing image formats above and beyond the minimum.
This extension provides a mechanism for an application to query the set of API-specific image formats that an OpenCL implementation can accept for sharing.</p>
</div>
<div class="paragraph">
<p>Note that the query functionality provided by this extension does not replace API-specific query functions or guarantee that an API-specific image with the returned format may be created.
Additionally, some APIs may require that a buffer or image be created with particular flags or parameters to be shared with OpenCL, so this extension does not guarantee that all API-specific images of the queried formats may be shared with OpenCL.
It does, however, guarantee that some API-specific images of the queried formats may be shared with OpenCL.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_new_api_functions"><a class="anchor" href="#_new_api_functions"></a>New API Functions</h2>
<div class="sectionbody">
<div class="paragraph">
<p>If <code>cl_khr_gl_sharing</code> is supported:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedGLTextureFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint num_entries,
    cl_GLenum* gl_formats,
    cl_uint* num_texture_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>If <code>cl_khr_dx9_media_sharing</code> or <code>cl_intel_dx9_media_sharing</code> is supported:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedDX9MediaSurfaceFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint plane,
    cl_uint num_entries,
    D3DFORMAT* dx9_formats,
    cl_uint* num_surface_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>If <code>cl_khr_d3d10_sharing</code> is supported:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedD3D10TextureFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint num_entries,
    DXGI_FORMAT* d3d10_formats,
    cl_uint* num_texture_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>If <code>cl_khr_d3d11_sharing</code> is supported:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedD3D11TextureFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint plane,
    cl_uint num_entries,
    DXGI_FORMAT* d3d11_formats,
    cl_uint* num_texture_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>If <code>cl_intel_va_api_media_sharing</code> is supported:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedVA_APIMediaSurfaceFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint plane,
    cl_uint num_entries,
    VAImageFormat* va_api_formats,
    cl_uint* num_surface_formats)</code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_modifications_to_extension_specifications"><a class="anchor" href="#_modifications_to_extension_specifications"></a>Modifications to Extension Specifications</h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_modifications_to_cl_khr_gl_sharing"><a class="anchor" href="#_modifications_to_cl_khr_gl_sharing"></a>Modifications to cl_khr_gl_sharing:</h3>
<div class="paragraph">
<p>Add a new section 11.4.X - "Querying OpenGL Image Formats for Sharing":</p>
</div>
<div class="paragraph">
<p>The function</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedGLTextureFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint num_entries,
    cl_GLenum* gl_formats,
    cl_uint* num_texture_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>can be used to query the list of OpenGL internal texture formats supported for sharing with an OpenCL implementation, given <em>flags</em> indicating how the image is going to be used and <em>image_type</em> indicating the type of image to create.
If there are multiple devices in the <em>context</em>, the returned set of image formats is the union of image formats supported by all devices in the <em>context</em>.</p>
</div>
<div class="paragraph">
<p><em>context</em> is a valid OpenCL context created from an OpenGL context.</p>
</div>
<div class="paragraph">
<p><em>flags</em> is a bit-field used to specify usage information about the image memory object that will be created from the OpenGL texture.
<em>flags</em> may be <code>CL_MEM_READ_WRITE</code>, to indicate that the image will be read from and written to by different kernel instances; <code>CL_MEM_READ_ONLY</code>, to indicate that the image will only be read from by a kernel; <code>CL_MEM_WRITE_ONLY</code>, to indicate that the image will be only written to by a kernel; or <code>CL_MEM_KERNEL_READ_AND_WRITE</code>, to indicate that the image will be both read from and written to by the same kernel instance.</p>
</div>
<div class="paragraph">
<p><em>image_type</em> describes the type of image that will be created from the OpenGL texture.</p>
</div>
<div class="paragraph">
<p><em>num_entries</em> specifies the number of entries that can be returned in the memory location given by <em>gl_formats</em>.</p>
</div>
<div class="paragraph">
<p><em>gl_formats</em> is a pointer to a memory location where the list of supported OpenGL internal texture formats supported for sharing is returned.
If <em>gl_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><em>num_texture_formats</em> returns the actual total number of supported OpenGL internal texture formats for the specified <em>context</em> and <em>flags</em> for the specified <em>image_type</em>.
If <em>num_texture_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><strong>clGetSupportedGLTextureFormatsINTEL</strong> returns <code>CL_SUCCESS</code> if the function is executed successfully.
Otherwise, it returns one of the following errors:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>CL_INVALID_CONTEXT</code> if <em>context</em> is not a valid context, or if <em>context</em> was not created from an OpenGL context.</p>
</li>
<li>
<p><code>CL_INVALID_VALUE</code> if values specified in <em>flags</em> or <em>image_type</em> are not valid, if <em>num_entries</em> is 0 and <em>gl_formats</em> is not <code>NULL</code>, or if both <em>gl_formats</em> and <em>num_texture_formats</em> are <code>NULL</code>.</p>
</li>
<li>
<p><code>CL_OUT_OF_RESOURCES</code> if there is a failure to allocate resources required by the OpenCL implementation on the device.</p>
</li>
<li>
<p><code>CL_OUT_OF_HOST_MEMORY</code> if there is a failure to allocate resources required by the OpenCL implementation on the host.</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_modifications_to_cl_khr_dx9_media_sharing_and_cl_intel_dx9_media_sharing"><a class="anchor" href="#_modifications_to_cl_khr_dx9_media_sharing_and_cl_intel_dx9_media_sharing"></a>Modifications to cl_khr_dx9_media_sharing and cl_intel_dx9_media_sharing:</h3>
<div class="paragraph">
<p>Add a new section 15.7.X - "Querying DirectX 9 Media Surface Formats for Sharing" to the OpenCL Extension Specification, and/or a new section 9.13.X to the cl_intel_dx9_media_sharing extension specification:</p>
</div>
<div class="paragraph">
<p>The function</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedDX9MediaSurfaceFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint plane,
    cl_uint num_entries,
    D3DFORMAT* dx9_formats,
    cl_uint* num_surface_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>can be used to query the list of DirectX 9 media surface formats supported for sharing with an OpenCL implementation, given <em>flags</em> indicating how the image is going to be used, <em>image_type</em> indicating the type of image to create, and optionally <em>plane</em> describing which plane will be shared for planar surface formats.
If there are multiple devices in the <em>context</em>, the returned set of image formats is the union of Direct9 media surface formats supported by all devices in the <em>context</em>.</p>
</div>
<div class="paragraph">
<p><em>context</em> is a valid OpenCL context that supports sharing DirectX 9 media surfaces.</p>
</div>
<div class="paragraph">
<p><em>flags</em> is a bit-field used to specify usage information about the image memory object that will be created from the DirectX 9 media surface.
<em>flags</em> may be <code>CL_MEM_READ_WRITE</code>, to indicate that the image will be read from and written to by different kernel instances; <code>CL_MEM_READ_ONLY</code>, to indicate that the image will only be read from by a kernel; <code>CL_MEM_WRITE_ONLY</code>, to indicate that the image will be only written to by a kernel; or <code>CL_MEM_KERNEL_READ_AND_WRITE</code>, to indicate that the image will be both read from and written to by the same kernel instance.</p>
</div>
<div class="paragraph">
<p><em>image_type</em> describes the type of image that will be created from the DirectX 9 media surface.</p>
</div>
<div class="paragraph">
<p><em>plane</em> describes the plane that will be shared, for planar surface formats.
When <em>plane</em> is equal to zero, the returned list of supported DirectX 9 media surface formats may include both planar surface formats and non-planar surface formats.</p>
</div>
<div class="paragraph">
<p><em>num_entries</em> specifies the number of entries that can be returned in the memory location given by <em>dx9_formats</em>.</p>
</div>
<div class="paragraph">
<p><em>dx9_formats</em> is a pointer to a memory location where the list of supported DirectX 9 media surface formats supported for sharing is returned.
If <em>dx9_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><em>num_surface_formats</em> returns the actual total number of supported DirectX 9 media surface formats for the specified <em>context</em> and <em>flags</em> for the specified <em>image_type</em>.
If <em>num_surface_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><strong>clGetSupportedDX9MediaSurfaceFormatsINTEL</strong> returns <code>CL_SUCCESS</code> if the function is executed successfully.
Otherwise, it returns one of the following errors:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>CL_INVALID_CONTEXT</code> if <em>context</em> is not a valid context, or if <em>context</em> does not support sharing DirectX 9 media surfaces.</p>
</li>
<li>
<p><code>CL_INVALID_VALUE</code> if values specified in <em>flags</em> or <em>image_type</em> are not valid, if <em>num_entries</em> is 0 and <em>dx9_formats</em> is not <code>NULL</code>, or if both <em>dx9_formats</em> and <em>num_surface_formats</em> are <code>NULL</code>.</p>
</li>
<li>
<p><code>CL_OUT_OF_RESOURCES</code> if there is a failure to allocate resources required by the OpenCL implementation on the device.</p>
</li>
<li>
<p><code>CL_OUT_OF_HOST_MEMORY</code> if there is a failure to allocate resources required by the OpenCL implementation on the host."</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_modifications_to_cl_khr_d3d10_sharing"><a class="anchor" href="#_modifications_to_cl_khr_d3d10_sharing"></a>Modifications to cl_khr_d3d10_sharing:</h3>
<div class="paragraph">
<p>Add a new section 13.7.X - "Querying Direct3D 10 Texture Resource Formats for Sharing" to the OpenCL Extension Specification:</p>
</div>
<div class="paragraph">
<p>The function</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedD3D10TextureFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint num_entries,
    DXGI_FORMAT* d3d10_formats,
    cl_uint* num_texture_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>can be used to query the list of Direct3D 10 texture resource formats supported for sharing with an OpenCL implementation, given <em>flags</em> indicating how the image is going to be used and <em>image_type</em> indicating the type of image to create.
If there are multiple devices in the <em>context</em>, the returned set of image formats is the union of Direct3D 10 texture resource formats supported by all devices in the <em>context</em>.</p>
</div>
<div class="paragraph">
<p><em>context</em> is a valid OpenCL context that supports sharing Direct3D 10 resources.</p>
</div>
<div class="paragraph">
<p><em>flags</em> is a bit-field used to specify usage information about the image memory object that will be created from the Direct3D 10 texture resource.
<em>flags</em> may be <code>CL_MEM_READ_WRITE</code>, to indicate that the image will be read from and written to by different kernel instances; <code>CL_MEM_READ_ONLY</code>, to indicate that the image will only be read from by a kernel; <code>CL_MEM_WRITE_ONLY</code>, to indicate that the image will be only written to by a kernel; or <code>CL_MEM_KERNEL_READ_AND_WRITE</code>, to indicate that the image will be both read from and written to by the same kernel instance.</p>
</div>
<div class="paragraph">
<p><em>image_type</em> describes the type of image that will be created from the Direct3D 10 texture resource.</p>
</div>
<div class="paragraph">
<p><em>num_entries</em> specifies the number of entries that can be returned in the memory location given by <em>d3d10_formats</em>.</p>
</div>
<div class="paragraph">
<p><em>d3d10_formats</em> is a pointer to a memory location where the list of supported Direct3D 10 texture resource formats supported for sharing is returned.
If <em>d3d10_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><em>num_texture_formats</em> returns the actual total number of supported Direct3D 10 texture resource formats for the specified <em>context</em> and <em>flags</em> for the specified <em>image_type</em>.
If <em>num_texture_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><strong>clGetSupportedD3D10TextureFormatsINTEL</strong> returns <code>CL_SUCCESS</code> if the function is executed successfully.
Otherwise, it returns one of the following errors:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>CL_INVALID_CONTEXT</code> if <em>context</em> is not a valid context, or if <em>context</em> does not support sharing Direct3D 10 resources.</p>
</li>
<li>
<p><code>CL_INVALID_VALUE</code> if values specified in <em>flags</em> or <em>image_type</em> are not valid, if <em>num_entries</em> is 0 and <em>d3d10_formats</em> is not <code>NULL</code>, or if both <em>d3d10_formats</em> and <em>num_texture_formats</em> are <code>NULL</code>.</p>
</li>
<li>
<p><code>CL_OUT_OF_RESOURCES</code> if there is a failure to allocate resources required by the OpenCL implementation on the device.</p>
</li>
<li>
<p><code>CL_OUT_OF_HOST_MEMORY</code> if there is a failure to allocate resources required by the OpenCL implementation on the host."</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_modifications_to_cl_khr_d3d11_sharing"><a class="anchor" href="#_modifications_to_cl_khr_d3d11_sharing"></a>Modifications to cl_khr_d3d11_sharing:</h3>
<div class="paragraph">
<p>Add a new section 14.7.X - "Querying Direct3D 11 Texture Resource Formats for Sharing" to the OpenCL Extension Specification:</p>
</div>
<div class="paragraph">
<p>The function</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedD3D11TextureFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint plane,
    cl_uint num_entries,
    DXGI_FORMAT* d3d11_formats,
    cl_uint* num_texture_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>can be used to query the list of Direct3D 11 texture resource formats supported for sharing with an OpenCL implementation, given <em>flags</em> indicating how the image is going to be used and <em>image_type</em> indicating the type of image to create.
If there are multiple devices in the <em>context</em>, the returned set of image formats is the union of Direct3D 11 texture resource formats supported by all devices in the <em>context</em>.</p>
</div>
<div class="paragraph">
<p><em>context</em> is a valid OpenCL context that supports sharing Direct3D 11 resources.</p>
</div>
<div class="paragraph">
<p><em>flags</em> is a bit-field used to specify usage information about the image memory object that will be created from the Direct3D 11 texture resource.
<em>flags</em> may be <code>CL_MEM_READ_WRITE</code>, to indicate that the image will be read from and written to by different kernel instances; <code>CL_MEM_READ_ONLY</code>, to indicate that the image will only be read from by a kernel; <code>CL_MEM_WRITE_ONLY</code>, to indicate that the image will be only written to by a kernel; or <code>CL_MEM_KERNEL_READ_AND_WRITE</code>, to indicate that the image will be both read from and written to by the same kernel instance.</p>
</div>
<div class="paragraph">
<p><em>image_type</em> describes the type of image that will be created from the Direct3D 11 texture resource.</p>
</div>
<div class="paragraph">
<p><em>plane</em> describes the plane that will be shared, for planar surface formats.
When <em>plane</em> is equal to zero, the returned list of supported Direct3D 11 texture resource formats may include both planar texture resource formats and non-planar texture resource formats.</p>
</div>
<div class="paragraph">
<p><em>num_entries</em> specifies the number of entries that can be returned in the memory location given by <em>d3d11_formats</em>.</p>
</div>
<div class="paragraph">
<p><em>d3d11_formats</em> is a pointer to a memory location where the list of supported Direct3D 11 texture resource formats supported for sharing is returned.
If <em>d3d11_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><em>num_texture_formats</em> returns the actual total number of supported Direct3D 11 texture resource formats for the specified <em>context</em> and <em>flags</em> for the specified <em>image_type</em>.
If <em>num_texture_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><strong>clGetSupportedD3D11TextureFormatsINTEL</strong> returns <code>CL_SUCCESS</code> if the function is executed successfully.
Otherwise, it returns one of the following errors:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>CL_INVALID_CONTEXT</code> if <em>context</em> is not a valid context, or if <em>context</em> does not support sharing Direct3D 11 resources.</p>
</li>
<li>
<p><code>CL_INVALID_VALUE</code> if values specified in <em>flags</em> or <em>image_type</em> are not valid, if <em>num_entries</em> is 0 and <em>d3d11_formats</em> is not <code>NULL</code>, or if both <em>d3d11_formats</em> and <em>num_texture_formats</em> are <code>NULL</code>.</p>
</li>
<li>
<p><code>CL_OUT_OF_RESOURCES</code> if there is a failure to allocate resources required by the OpenCL implementation on the device.</p>
</li>
<li>
<p><code>CL_OUT_OF_HOST_MEMORY</code> if there is a failure to allocate resources required by the OpenCL implementation on the host."</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="_modifications_to_cl_intel_va_api_media_sharing"><a class="anchor" href="#_modifications_to_cl_intel_va_api_media_sharing"></a>Modifications to cl_intel_va_api_media_sharing:</h3>
<div class="paragraph">
<p>Add a new section 9.X.Y - "Querying VA_API Media Image Formats for Sharing" to the cl_intel_va_api_media_sharing extension specification:</p>
</div>
<div class="paragraph">
<p>"The function</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code>cl_int clGetSupportedVA_APIMediaSurfaceFormatsINTEL(
    cl_context context,
    cl_mem_flags flags,
    cl_mem_object_type image_type,
    cl_uint plane,
    cl_uint num_entries,
    VAImageFormat* va_api_formats,
    cl_uint* num_surface_formats)</code></pre>
</div>
</div>
<div class="paragraph">
<p>can be used to query the list of VA_API media image formats supported for sharing with an OpenCL implementation, given <em>flags</em> indicating how the image is going to be used and <em>image_type</em> indicating the type of image to create.
If there are multiple devices in the <em>context</em>, the returned set of image formats is the union of VA_API media image formats supported by all devices in the <em>context</em>.</p>
</div>
<div class="paragraph">
<p><em>context</em> is a valid OpenCL context that supports sharing VA_API media images.</p>
</div>
<div class="paragraph">
<p><em>flags</em> is a bit-field used to specify usage information about the image memory object that will be created from the VA_API media image.
<em>flags</em> may be <code>CL_MEM_READ_WRITE</code>, to indicate that the image will be read from and written to by different kernel instances; <code>CL_MEM_READ_ONLY</code>, to indicate that the image will only be read from by a kernel; <code>CL_MEM_WRITE_ONLY</code>, to indicate that the image will be only written to by a kernel; or <code>CL_MEM_KERNEL_READ_AND_WRITE</code>, to indicate that the image will be both read from and written to by the same kernel instance.</p>
</div>
<div class="paragraph">
<p><em>image_type</em> describes the type of image that will be created from the VA_API media image.</p>
</div>
<div class="paragraph">
<p><em>plane</em> describes the plane that will be shared, for planar surface formats.
When <em>plane</em> is equal to zero, the returned list of VA_API media image formats may include both planar media image formats and non-planar media image formats.</p>
</div>
<div class="paragraph">
<p><em>num_entries</em> specifies the number of entries that can be returned in the memory location given by <em>va_api_formats</em>.</p>
</div>
<div class="paragraph">
<p><em>va_api_formats</em> is a pointer to a memory location where the list of supported VA_API media image formats supported for sharing is returned.
If <em>va_api_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><em>num_surface_formats</em> returns the actual total number of supported VA_API media image formats for the specified <em>context</em> and <em>flags</em> for the specified <em>image_type</em>.
If <em>num_surface_formats</em> is <code>NULL</code>, it is ignored.</p>
</div>
<div class="paragraph">
<p><strong>clGetSupportedVA_APIMediaSurfaceFormatsINTEL</strong> returns <code>CL_SUCCESS</code> if the function is executed successfully.
Otherwise, it returns one of the following errors:</p>
</div>
<div class="ulist">
<ul>
<li>
<p><code>CL_INVALID_CONTEXT</code> if <em>context</em> is not a valid context, or if <em>context</em> does not support sharing VA_API media images.</p>
</li>
<li>
<p><code>CL_INVALID_VALUE</code> if values specified in <em>flags</em> or <em>image_type</em> are not valid, if <em>num_entries</em> is 0 and <em>va_api_formats</em> is not <code>NULL</code>, or if both <em>va_api_formats</em> and <em>num_surface_formats</em> are <code>NULL</code>.</p>
</li>
<li>
<p><code>CL_OUT_OF_RESOURCES</code> if there is a failure to allocate resources required by the OpenCL implementation on the device.</p>
</li>
<li>
<p><code>CL_OUT_OF_HOST_MEMORY</code> if there is a failure to allocate resources required by the OpenCL implementation on the host."</p>
</li>
</ul>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_issues"><a class="anchor" href="#_issues"></a>Issues</h2>
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<p>What should the name of this extension be?</p>
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<p>Status: <code>RESOLVED</code></p>
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<p>Discussion: The best name appears to be cl_intel_sharing_format_query.
Another possibility is cl_intel_interop_format_query, but it seems better to have 'sharing' in the name, since all of the API-specific sharing extensions also have 'sharing' in the name, with the exception of cl_khr_egl_image.</p>
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<p>Do we need to say anything about cl_intel_d3d11_nv12_media_sharing in this spec?</p>
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<p>Status: <code>RESOLVED</code></p>
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<p>Discussion: Since cl_khr_d3d11_sharing is required by cl_intel_d3d11_nv12_media_sharing, we do not need to say anything about cl_intel_d3d11_nv12_media_sharing in this spec.</p>
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<p>What should the query for EGL images return?</p>
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<p>Status: <code>RESOLVED</code>, this spec will not support EGL sharing format queries.</p>
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<p>Discussion: The most common flow to get an EGL image to interop with appears to be:</p>
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<p>Create a GraphicBuffer with a requested PIXEL_FORMAT</p>
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<p>Get an EGLClientBuffer with the getNativeBuffer() member function</p>
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<p>Create an EGLImageKHR by passing the EGLClientBuffer to eglCreateImageKHR()</p>
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<p>Create an OpenCL cl_mem from the EGLImageKHR using clCreateFromEGLImageKHR()</p>
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<p>So, arguably the query for EGL images should return PIXEL_FORMATs that can be passed to the GraphicBuffer constructor to get an image to interop with, which would work with this flow, but not for other flows that could also create EGL images to interop with.</p>
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<p>Since there are multiple valid flows that can result in an EGL image to interop with, does it even make sense to have a query for EGL images?</p>
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<p>Decision: Not going to support EGL sharing format queries for now, due to the multiple "domains" that can create EGL images.
If desired, we can always add cl_intel_egl_sharing_format_query at a later date.
Note as well that the EGL sharing extension doesn&#8217;t have a "list of supported image formats" like the other sharing APIs, so the value of a sharing format query for EGL is already less than it is for other sharing APIs.</p>
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<p>What should the query for VA_API media surfaces return?</p>
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<p>Status: <code>RESOLVED</code></p>
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<p>Discussion: Right now it&#8217;s defined to return a VAImageFormat, which is correct, but arguably overkill since we&#8217;re only using VA_API sharing for media surfaces.
The alternative is to return unsigned ints representing the appropriate fourcc codes.</p>
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<p>For OpenGL sharing, should the query include the un-sized, un-typed "base" internal formats?  Or should it only include the sized internal formats?</p>
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<p>Status: <code>RESOLVED</code></p>
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<p>Discussion: For the base internal formats, the user is at the mercy of the actual internal format chosen by the OpenGL driver.
So, it may be possible that there could be OpenGL textures created with the same base internal format, where one of them is shareable with OpenCL and one of them is not, which could be confusing.
Then again, it&#8217;s also somewhat confusing to leave the base internal formats out of the image format query since it&#8217;s likely that sharing will succeed for OpenGL textures created with base the base internal formats in many cases.</p>
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<p>Decision: This extension won&#8217;t say anything about whether the query will return of the un-sized, un-typed "base" internal formats or the sized internal formats.</p>
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<p>How should we handle sharing APIs like DX9 media sharing where a format may be supported for sharing for some planes (such as the individual planes of a planar YUV image) but not for other planes (such as a plane value indicating a monolithic planar YUV image)?</p>
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<p>Status: <code>RESOLVED</code></p>
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<p>Decision: Added a "plane" argument to the sharing format query for the following APIs:</p>
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<p>clGetSupportedDX9MediaSurfaceFormatsINTEL</p>
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<p>clGetSupportedD3D11TextureFormatsINTEL</p>
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<p>clGetSupportedVA_APIMediaSurfaceFormatsINTEL</p>
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<p>No "plane" argument was added to these APIs, since they do not support sharing planar images:</p>
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<p>clGetSupportedGLTextureFormatsINTEL</p>
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<p>clGetSupportedD3D10TextureFormatsINTEL</p>
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<p>Note that the D3D10 / D3D11 sharing APIs specify the "plane" using the "subresource" argument, but for the purposes of the sharing format query we really do want this to be the "plane", since it doesn&#8217;t make sense to query for a particular "subresource".</p>
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<div class="sect1">
<h2 id="_revision_history"><a class="anchor" href="#_revision_history"></a>Revision History</h2>
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<th class="tableblock halign-left valign-top">Version</th>
<th class="tableblock halign-left valign-top">Date</th>
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<td class="tableblock halign-left valign-top"><p class="tableblock">1.0.0</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">2021-05-31</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Ben Ashbaugh</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Initial public revision</strong></p></td>
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Last updated 2021-06-30 15:09:23 -0700
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