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	<title>KTX2Loader - Three.js Docs</title>
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		<p class="inheritance" translate="no"><a href="Loader.html">Loader</a> → </p>
	<h1 translate="no">KTX2Loader</h1>
		<section>
			<header>
				<div class="class-description"><p>A loader for KTX 2.0 GPU Texture containers.</p>
<p>KTX 2.0 is a container format for various GPU texture formats. The loader supports Basis Universal GPU textures,
which can be quickly transcoded to a wide variety of GPU texture compression formats. While KTX 2.0 also allows
other hardware-specific formats, this loader does not yet parse them.</p>
<p>This loader parses the KTX 2.0 container and transcodes to a supported GPU compressed texture format.
The required WASM transcoder and JS wrapper are available from the <code>examples/jsm/libs/basis</code> directory.</p>
<p>This loader relies on Web Assembly which is not supported in older browsers.</p>
<p>References:</p>
<ul>
<li><a href="http://github.khronos.org/KTX-Specification/">KTX specification</a></li>
<li><a href="https://www.khronos.org/registry/DataFormat/specs/1.3/dataformat.1.3.html#basicdescriptor">DFD</a></li>
<li><a href="https://github.com/BinomialLLC/basis_universal/wiki/UASTC-HDR-Texture-Specification-v1.0">BasisU HDR</a></li>
</ul></div>
				<h2>Code Example</h2>
				<div translate="no"><pre><code class="language-js">const loader = new KTX2Loader();
loader.setTranscoderPath( 'examples/jsm/libs/basis/' );
loader.detectSupport( renderer );
const texture = loader.loadAsync( 'diffuse.ktx2' );
</code></pre></div>
			</header>
			<article>
				<h2 class="subsection-title">Import</h2>
				<p><span translate="no">KTX2Loader</span> is an addon, and must be imported explicitly, see <a href="https://threejs.org/manual/#en/installation" target="_blank">Installation#Addons</a>.</p>
				<pre><code class="language-js">import { KTX2Loader } from 'three/addons/loaders/KTX2Loader.js';</code></pre>
				<div class="container-overview">
					<h2>Constructor</h2>
					<h3 class="name name-method" id="KTX2Loader" translate="no">new <a href="#KTX2Loader">KTX2Loader</a><span class="signature">( manager : <span class="param-type">LoadingManager</span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Constructs a new KTX2 loader.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>manager</code></td>
									<td class="description last"><p>The loading manager.</p></td>
								</tr>
							</tbody>
						</table>
					</div>
				</div>
				<h2 class="subsection-title">Methods</h2>
					<h3 class="name name-method" id="detectSupport" translate="no">.<a href="#detectSupport">detectSupport</a><span class="signature">( renderer : <span class="param-type">WebGPURenderer | WebGLRenderer</span> )</span><span class="type-signature"> : <a href="KTX2Loader.html">KTX2Loader</a></span> </h3>
					<div class="method">
						<div class="description">
							<p>Detects hardware support for available compressed texture formats, to determine
the output format for the transcoder. Must be called before loading a texture.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>renderer</code></td>
									<td class="description last"><p>The renderer.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> A reference to this loader.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="detectSupportAsync" translate="no">.<a href="#detectSupportAsync">detectSupportAsync</a><span class="signature">( renderer : <span class="param-type">WebGPURenderer</span> )</span><span class="type-signature"> : Promise</span> <span class="type-signature">(async) </span></h3>
					<div class="method">
						<div class="description">
							<p>Async version of <a href="KTX2Loader.html#detectSupport">KTX2Loader#detectSupport</a>.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>renderer</code></td>
									<td class="description last"><p>The renderer.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="important tag-deprecated"><strong>Deprecated:</strong> Yes</dt>
						</dl>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> A Promise that resolves when the support has been detected.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="dispose" translate="no">.<a href="#dispose">dispose</a><span class="signature">()</span> </h3>
					<div class="method">
						<div class="description">
							<p>Frees internal resources. This method should be called
when the loader is no longer required.</p>
						</div>
					</div>
					<h3 class="name name-method" id="load" translate="no">.<a href="#load">load</a><span class="signature">( url : <span class="param-type">string</span>, onLoad : <span class="param-type">function</span>, onProgress : <span class="param-type">onProgressCallback</span>, onError : <span class="param-type">onErrorCallback</span> )</span> </h3>
					<div class="method">
						<div class="description">
							<p>Starts loading from the given URL and passes the loaded KTX2 texture
to the <code>onLoad()</code> callback.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>url</code></td>
									<td class="description last"><p>The path/URL of the file to be loaded. This can also be a data URI.</p></td>
								</tr>
								<tr>
									<td class="name"><code>onLoad</code></td>
									<td class="description last"><p>Executed when the loading process has been finished.</p></td>
								</tr>
								<tr>
									<td class="name"><code>onProgress</code></td>
									<td class="description last"><p>Executed while the loading is in progress.</p></td>
								</tr>
								<tr>
									<td class="name"><code>onError</code></td>
									<td class="description last"><p>Executed when errors occur.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-overrides"><strong>Overrides:</strong> <a href="Loader.html#load">Loader#load</a></dt>
						</dl>
					</div>
					<h3 class="name name-method" id="parse" translate="no">.<a href="#parse">parse</a><span class="signature">( buffer : <span class="param-type">ArrayBuffer</span>, onLoad : <span class="param-type">function</span>, onError : <span class="param-type">onErrorCallback</span> )</span><span class="type-signature"> : Promise</span> </h3>
					<div class="method">
						<div class="description">
							<p>Parses the given KTX2 data.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>buffer</code></td>
									<td class="description last"><p>The raw KTX2 data as an array buffer.</p></td>
								</tr>
								<tr>
									<td class="name"><code>onLoad</code></td>
									<td class="description last"><p>Executed when the loading/parsing process has been finished.</p></td>
								</tr>
								<tr>
									<td class="name"><code>onError</code></td>
									<td class="description last"><p>Executed when errors occur.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-overrides"><strong>Overrides:</strong> <a href="Loader.html#parse">Loader#parse</a></dt>
						</dl>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> A Promise that resolves when the parsing has been finished.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="setTranscoderPath" translate="no">.<a href="#setTranscoderPath">setTranscoderPath</a><span class="signature">( path : <span class="param-type">string</span> )</span><span class="type-signature"> : <a href="KTX2Loader.html">KTX2Loader</a></span> </h3>
					<div class="method">
						<div class="description">
							<p>Sets the transcoder path.</p>
<p>The WASM transcoder and JS wrapper are available from the <code>examples/jsm/libs/basis</code> directory.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>path</code></td>
									<td class="description last"><p>The transcoder path to set.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> A reference to this loader.</dt>
						</dl>
					</div>
					<h3 class="name name-method" id="setWorkerLimit" translate="no">.<a href="#setWorkerLimit">setWorkerLimit</a><span class="signature">( workerLimit : <span class="param-type">number</span> )</span><span class="type-signature"> : <a href="KTX2Loader.html">KTX2Loader</a></span> </h3>
					<div class="method">
						<div class="description">
							<p>Sets the maximum number of Web Workers to be allocated by this instance.</p>
						</div>
						<table class="params">
							<tbody>
								<tr>
									<td class="name"><code>workerLimit</code></td>
									<td class="description last"><p>The worker limit.</p></td>
								</tr>
							</tbody>
						</table>
						<dl class="details">
							<dt class="tag-returns"><strong>Returns:</strong> A reference to this loader.</dt>
						</dl>
					</div>
				<h2 class="subsection-title">Source</h2>
				<p>
					<a href="https://github.com/mrdoob/three.js/blob/master/examples/jsm/loaders/KTX2Loader.js" target="_blank" rel="noopener" translate="no">examples/jsm/loaders/KTX2Loader.js</a>
				</p>
			</article>
		</section>
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