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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `UnsupportedFeature` enum in crate `jpeg_decoder`."><meta name="keywords" content="rust, rustlang, rust-lang, UnsupportedFeature"><title>jpeg_decoder::UnsupportedFeature - Rust</title><link rel="stylesheet" type="text/css" href="../normalize.css"><link rel="stylesheet" type="text/css" href="../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script></head><body class="rustdoc enum"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><p class='location'>Enum UnsupportedFeature</p><div class="sidebar-elems"><div class="block items"><a class="sidebar-title" href="#variants">Variants</a><div class="sidebar-links"><a href="#variant.Hierarchical">Hierarchical</a><a href="#variant.Lossless">Lossless</a><a href="#variant.ArithmeticEntropyCoding">ArithmeticEntropyCoding</a><a href="#variant.SamplePrecision">SamplePrecision</a><a href="#variant.ComponentCount">ComponentCount</a><a href="#variant.DNL">DNL</a><a href="#variant.SubsamplingRatio">SubsamplingRatio</a><a href="#variant.NonIntegerSubsamplingRatio">NonIntegerSubsamplingRatio</a></div><a class="sidebar-title" href="#implementations">Trait Implementations</a><div class="sidebar-links"><a href="#impl-Debug">Debug</a></div><a class="sidebar-title" href="#synthetic-implementations">Auto Trait Implementations</a><div class="sidebar-links"><a href="#impl-Send">Send</a><a href="#impl-Sync">Sync</a></div></div><p class='location'><a href='index.html'>jpeg_decoder</a></p><script>window.sidebarCurrent = {name: 'UnsupportedFeature', ty: 'enum', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../settings.html"><img src="../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><h1 class='fqn'><span class='in-band'>Enum <a href='index.html'>jpeg_decoder</a>::<wbr><a class="enum" href=''>UnsupportedFeature</a></span><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/jpeg_decoder/error.rs.html#13-31' title='goto source code'>[src]</a></span></h1><div class="docblock type-decl"><pre class='rust enum'>pub enum UnsupportedFeature {
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Hierarchical,
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Lossless,
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ArithmeticEntropyCoding,
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SamplePrecision(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>),
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ComponentCount(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>),
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DNL,
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SubsamplingRatio,
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NonIntegerSubsamplingRatio,
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}</pre></div><div class='docblock'><p>An enumeration over JPEG features (currently) unsupported by this library.</p>
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<p>Support for features listed here may be included in future versions of this library.</p>
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</div><h2 id='variants' class='variants small-section-header'>
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Variants<a href='#variants' class='anchor'></a></h2>
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<span id="variant.Hierarchical" class="variant small-section-header"><a href="#variant.Hierarchical" class="anchor field"></a><span id='Hierarchical.v' class='invisible'><code>Hierarchical</code></span></span><div class='docblock'><p>Hierarchical JPEG.</p>
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</div><span id="variant.Lossless" class="variant small-section-header"><a href="#variant.Lossless" class="anchor field"></a><span id='Lossless.v' class='invisible'><code>Lossless</code></span></span><div class='docblock'><p>Lossless JPEG.</p>
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</div><span id="variant.ArithmeticEntropyCoding" class="variant small-section-header"><a href="#variant.ArithmeticEntropyCoding" class="anchor field"></a><span id='ArithmeticEntropyCoding.v' class='invisible'><code>ArithmeticEntropyCoding</code></span></span><div class='docblock'><p>JPEG using arithmetic entropy coding instead of Huffman coding.</p>
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</div><span id="variant.SamplePrecision" class="variant small-section-header"><a href="#variant.SamplePrecision" class="anchor field"></a><span id='SamplePrecision.v' class='invisible'><code>SamplePrecision(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>)</code></span></span><div class='docblock'><p>Sample precision in bits. 8 bit sample precision is what is currently supported.</p>
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</div><span id="variant.ComponentCount" class="variant small-section-header"><a href="#variant.ComponentCount" class="anchor field"></a><span id='ComponentCount.v' class='invisible'><code>ComponentCount(<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>)</code></span></span><div class='docblock'><p>Number of components in an image. 1, 3 and 4 components are currently supported.</p>
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</div><span id="variant.DNL" class="variant small-section-header"><a href="#variant.DNL" class="anchor field"></a><span id='DNL.v' class='invisible'><code>DNL</code></span></span><div class='docblock'><p>An image can specify a zero height in the frame header and use the DNL (Define Number of
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Lines) marker at the end of the first scan to define the number of lines in the frame.</p>
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</div><span id="variant.SubsamplingRatio" class="variant small-section-header"><a href="#variant.SubsamplingRatio" class="anchor field"></a><span id='SubsamplingRatio.v' class='invisible'><code>SubsamplingRatio</code></span></span><div class='docblock'><p>Subsampling ratio.</p>
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</div><span id="variant.NonIntegerSubsamplingRatio" class="variant small-section-header"><a href="#variant.NonIntegerSubsamplingRatio" class="anchor field"></a><span id='NonIntegerSubsamplingRatio.v' class='invisible'><code>NonIntegerSubsamplingRatio</code></span></span><div class='docblock'><p>A subsampling ratio not representable as an integer.</p>
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</div><h2 id='implementations' class='small-section-header'>Trait Implementations<a href='#implementations' class='anchor'></a></h2><div id='implementations-list'><h3 id='impl-Debug' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a> for <a class="enum" href="../jpeg_decoder/enum.UnsupportedFeature.html" title="enum jpeg_decoder::UnsupportedFeature">UnsupportedFeature</a></code><a href='#impl-Debug' class='anchor'></a></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/jpeg_decoder/error.rs.html#12' title='goto source code'>[src]</a></span></td></tr></tbody></table></h3><div class='impl-items'><h4 id='method.fmt' class="method"><span id='fmt.v' class='invisible'><table class='table-display'><tbody><tr><td><code>fn <a href='https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt' class='fnname'>fmt</a>(&self, f: &mut <a class="struct" href="https://doc.rust-lang.org/nightly/core/fmt/struct.Formatter.html" title="struct core::fmt::Formatter">Formatter</a>) -> <a class="type" href="https://doc.rust-lang.org/nightly/core/fmt/type.Result.html" title="type core::fmt::Result">Result</a></code></span></td><td><span class='out-of-band'><div class='ghost'></div><a class='srclink' href='../src/jpeg_decoder/error.rs.html#12' title='goto source code'>[src]</a></td></tr></tbody></table></span></h4><div class='docblock'><p>Formats the value using the given formatter. <a href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html#tymethod.fmt">Read more</a></p>
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</div></div></div><h2 id='synthetic-implementations' class='small-section-header'>Auto Trait Implementations<a href='#synthetic-implementations' class='anchor'></a></h2><div id='synthetic-implementations-list'><h3 id='impl-Send' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="enum" href="../jpeg_decoder/enum.UnsupportedFeature.html" title="enum jpeg_decoder::UnsupportedFeature">UnsupportedFeature</a></code><a href='#impl-Send' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div><h3 id='impl-Sync' class='impl'><span class='in-band'><table class='table-display'><tbody><tr><td><code>impl <a class="trait" href="https://doc.rust-lang.org/nightly/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="enum" href="../jpeg_decoder/enum.UnsupportedFeature.html" title="enum jpeg_decoder::UnsupportedFeature">UnsupportedFeature</a></code><a href='#impl-Sync' class='anchor'></a></span></td><td><span class='out-of-band'></span></td></tr></tbody></table></h3><div class='impl-items'></div></div></section><section id="search" class="content hidden"></section><section class="footer"></section><aside id="help" class="hidden"><div><h1 class="hidden">Help</h1><div class="shortcuts"><h2>Keyboard Shortcuts</h2><dl><dt><kbd>?</kbd></dt><dd>Show this help dialog</dd><dt><kbd>S</kbd></dt><dd>Focus the search field</dd><dt><kbd>↑</kbd></dt><dd>Move up in search results</dd><dt><kbd>↓</kbd></dt><dd>Move down in search results</dd><dt><kbd>↹</kbd></dt><dd>Switch tab</dd><dt><kbd>⏎</kbd></dt><dd>Go to active search result</dd><dt><kbd>+</kbd></dt><dd>Expand all sections</dd><dt><kbd>-</kbd></dt><dd>Collapse all sections</dd></dl></div><div class="infos"><h2>Search Tricks</h2><p>Prefix searches with a type followed by a colon (e.g. <code>fn:</code>) to restrict the search to a given type.</p><p>Accepted types are: <code>fn</code>, <code>mod</code>, <code>struct</code>, <code>enum</code>, <code>trait</code>, <code>type</code>, <code>macro</code>, and <code>const</code>.</p><p>Search functions by type signature (e.g. <code>vec -> usize</code> or <code>* -> vec</code>)</p><p>Search multiple things at once by splitting your query with comma (e.g. <code>str,u8</code> or <code>String,struct:Vec,test</code>)</p></div></div></aside><script>window.rootPath = "../";window.currentCrate = "jpeg_decoder";</script><script src="../aliases.js"></script><script src="../main.js"></script><script defer src="../search-index.js"></script></body></html>
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