367 lines
9.9 KiB
HTML
367 lines
9.9 KiB
HTML
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<!DOCTYPE HTML>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="html/html; charset=utf-8" />
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<title>NSData(PSDAdditions) Category Reference</title>
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<meta id="xcode-display" name="xcode-display" content="render"/>
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<meta name="generator" content="appledoc 2.0.5 (build 759)" />
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</head>
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<body>
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<header id="top_header">
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<div id="library" class="hideInXcode">
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<h1><a id="libraryTitle" href="../index.html">PSDWriter Documentation </a></h1>
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<a id="developerHome" href="../index.html">Foundry376</a>
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</div>
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<div id="title" role="banner">
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<h1 class="hideInXcode">NSData(PSDAdditions) Category Reference</h1>
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</div>
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<ul id="headerButtons" role="toolbar">
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<li id="toc_button">
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<button aria-label="Show Table of Contents" role="checkbox" class="open" id="table_of_contents"><span class="disclosure"></span>Table of Contents</button>
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</li>
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<li id="jumpto_button" role="navigation">
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<select id="jumpTo">
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<option value="top">Jump To…</option>
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<option value="tasks">Tasks</option>
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<option value="instance_methods">Instance Methods</option>
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<option value="//api/name/packedBitsDescription"> - packedBitsDescription</option>
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<option value="//api/name/packedBitsForRange:skip:"> - packedBitsForRange:skip:</option>
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</select>
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</li>
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</header>
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<nav id="tocContainer" class="isShowingTOC">
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<ul id="toc" role="tree">
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<li role="treeitem" id="task_treeitem"><span class="nodisclosure"></span><span class="sectionName"><a href="#tasks">Tasks</a></span><ul>
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</ul></li>
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<li role="treeitem" class="children"><span class="disclosure"></span><span class="sectionName"><a href="#instance_methods">Instance Methods</a></span><ul>
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<li><span class="nodisclosure"></span><span class="sectionName"><a href="#//api/name/packedBitsDescription">packedBitsDescription</a></span></li>
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<li><span class="nodisclosure"></span><span class="sectionName"><a href="#//api/name/packedBitsForRange:skip:">packedBitsForRange:skip:</a></span></li>
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</ul></li>
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</ul>
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</nav>
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<article>
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<div id="contents" class="isShowingTOC" role="main">
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<a title="NSData(PSDAdditions) Category Reference" name="top"></a>
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<div class="main-navigation navigation-top">
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<ul>
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<li><a href="../index.html">Index</a></li>
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<li><a href="../hierarchy.html">Hierarchy</a></li>
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</ul>
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</div>
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<div id="header">
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<div class="section-header">
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<h1 class="title title-header">NSData(PSDAdditions) Category Reference</h1>
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</div>
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</div>
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<div id="container">
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<div class="section section-specification"><table cellspacing="0"><tbody>
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<tr>
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<td class="specification-title">Declared in</td>
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<td class="specification-value">NSDataPSDAdditions.h<br />NSDataPSDAdditions.m</td>
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</tr>
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</tbody></table></div>
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<div class="section section-tasks">
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<a title="Tasks" name="tasks"></a>
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<h2 class="subtitle subtitle-tasks">Tasks</h2>
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<ul class="task-list">
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<li>
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<span class="tooltip">
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<code><a href="#//api/name/packedBitsDescription">– packedBitsDescription</a></code>
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<span class="tooltip"><p>Takes packedBits data and prints out a description of the packed contents by
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running the decode operation and explaining via NSLog how the data is being
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decoded. Useful for checking that packedBits data is correct.</p></span>
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</span>
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</li><li>
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<span class="tooltip">
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<code><a href="#//api/name/packedBitsForRange:skip:">– packedBitsForRange:skip:</a></code>
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<span class="tooltip"><p>A special version of packedBits which will take the data and pack every nth
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value.</p></span>
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</span>
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</li>
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</ul>
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</div>
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<div class="section section-methods">
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<a title="Instance Methods" name="instance_methods"></a>
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<h2 class="subtitle subtitle-methods">Instance Methods</h2>
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<div class="section-method">
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<a name="//api/name/packedBitsDescription" title="packedBitsDescription"></a>
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<h3 class="subsubtitle method-title">packedBitsDescription</h3>
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<div class="method-subsection brief-description">
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<p>Takes packedBits data and prints out a description of the packed contents by
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running the decode operation and explaining via NSLog how the data is being
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decoded. Useful for checking that packedBits data is correct.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (NSString *)packedBitsDescription</code></div>
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<div class="method-subsection discussion-section">
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<h4 class="method-subtitle">Discussion</h4>
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<p>Takes packedBits data and prints out a description of the packed contents by
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running the decode operation and explaining via NSLog how the data is being
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decoded. Useful for checking that packedBits data is correct.</p>
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</div>
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<div class="method-subsection declared-in-section">
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<h4 class="method-subtitle">Declared In</h4>
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<code class="declared-in-ref">NSDataPSDAdditions.h</code><br />
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</div>
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</div>
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<div class="section-method">
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<a name="//api/name/packedBitsForRange:skip:" title="packedBitsForRange:skip:"></a>
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<h3 class="subsubtitle method-title">packedBitsForRange:skip:</h3>
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<div class="method-subsection brief-description">
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<p>A special version of packedBits which will take the data and pack every nth
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value.</p>
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</div>
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<div class="method-subsection method-declaration"><code>- (NSData *)packedBitsForRange:(NSRange)<em>range</em> skip:(int)<em>skip</em></code></div>
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<div class="method-subsection arguments-section parameters">
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<h4 class="method-subtitle parameter-title">Parameters</h4>
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<dl class="argument-def parameter-def">
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<dt><em>skip:</em></dt>
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<dd><p>The number of bytes to advance as the data is encoded. Skip = 1 will
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encode every byte, skip = 4 will encode every fourth byte, and so on.</p></dd>
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</dl>
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<dl class="argument-def parameter-def">
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<dt><em>range:</em></dt>
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<dd><p>The range within the data object that should be encoded. Useful
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for specifying a non-zero starting offset to get a certain channel encoded.</p></dd>
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</dl>
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</div>
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<div class="method-subsection discussion-section">
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<h4 class="method-subtitle">Discussion</h4>
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<p>A special version of packedBits which will take the data and pack every nth
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value.</p>
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<p>This is important for <a href="../Classes/PSDWriter.html">PSDWriter</a> because it’s necessary to encode R, then G,
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then B, then A data – so we essentially start at offset 0, skip 4, then do offset 1,
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skip 4, etc… to compress the data with very minimal memory footprint.</p>
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<p>For normal packbits just to skip = 1</p>
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</div>
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<div class="method-subsection declared-in-section">
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<h4 class="method-subtitle">Declared In</h4>
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<code class="declared-in-ref">NSDataPSDAdditions.h</code><br />
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</div>
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</div>
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</div>
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</div>
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<div class="main-navigation navigation-bottom">
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<ul>
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<li><a href="../index.html">Index</a></li>
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<li><a href="../hierarchy.html">Hierarchy</a></li>
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</ul>
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</div>
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<div id="footer">
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<hr />
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<div class="footer-copyright">
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<p><span class="copyright">© 2012 Foundry376. All rights reserved. (Last updated: 2012-03-08)</span><br />
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<span class="generator">Generated by <a href="http://appledoc.gentlebytes.com">appledoc 2.0.5 (build 759)</a>.</span></p>
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</div>
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</article>
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function jumpToChange()
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