<!DOCTYPE html> <!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]--> <!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]--> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>PIL.DcxImagePlugin — Pillow (PIL Fork) 5.4.1 documentation</title> <script type="text/javascript" src="../../_static/js/modernizr.min.js"></script> <script type="text/javascript" id="documentation_options" data-url_root="../../" src="../../_static/documentation_options.js"></script> <script type="text/javascript" src="../../_static/jquery.js"></script> <script type="text/javascript" src="../../_static/underscore.js"></script> <script type="text/javascript" src="../../_static/doctools.js"></script> <script type="text/javascript" src="../../_static/language_data.js"></script> <script type="text/javascript" src="../../_static/js/script.js"></script> <script type="text/javascript" src="../../_static/js/theme.js"></script> <link rel="stylesheet" href="../../_static/css/theme.css" type="text/css" /> <link rel="stylesheet" href="../../_static/pygments.css" type="text/css" /> <link rel="author" title="About these documents" href="../../about.html" /> <link rel="index" title="Index" href="../../genindex.html" /> <link rel="search" title="Search" href="../../search.html" /> </head> <body class="wy-body-for-nav"> <div class="wy-grid-for-nav"> <nav data-toggle="wy-nav-shift" class="wy-nav-side"> <div class="wy-side-scroll"> <div class="wy-side-nav-search" > <a href="../../index.html" class="icon icon-home"> Pillow (PIL Fork) </a> <div class="version"> 5.4.1 </div> <div role="search"> <form id="rtd-search-form" class="wy-form" action="../../search.html" method="get"> <input type="text" name="q" placeholder="Search docs" /> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> </div> <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation"> <ul> <li class="toctree-l1"><a class="reference internal" href="../../installation.html">Installation</a></li> <li class="toctree-l1"><a class="reference internal" href="../../handbook/index.html">Handbook</a></li> <li class="toctree-l1"><a class="reference internal" href="../../reference/index.html">Reference</a></li> <li class="toctree-l1"><a class="reference internal" href="../../porting.html">Porting</a></li> <li class="toctree-l1"><a class="reference internal" href="../../about.html">About</a></li> <li class="toctree-l1"><a class="reference internal" href="../../releasenotes/index.html">Release Notes</a></li> <li class="toctree-l1"><a class="reference internal" href="../../deprecations.html">Deprecations and removals</a></li> </ul> </div> </div> </nav> <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap"> <nav class="wy-nav-top" aria-label="top navigation"> <i data-toggle="wy-nav-top" class="fa fa-bars"></i> <a href="../../index.html">Pillow (PIL Fork)</a> </nav> <div class="wy-nav-content"> <div class="rst-content"> <div role="navigation" aria-label="breadcrumbs navigation"> <ul class="wy-breadcrumbs"> <li><a href="../../index.html">Docs</a> »</li> <li><a href="../index.html">Module code</a> »</li> <li>PIL.DcxImagePlugin</li> <li class="wy-breadcrumbs-aside"> </li> </ul> <hr/> </div> <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article"> <div itemprop="articleBody"> <h1>Source code for PIL.DcxImagePlugin</h1><div class="highlight"><pre> <span></span><span class="c1">#</span> <span class="c1"># The Python Imaging Library.</span> <span class="c1"># $Id$</span> <span class="c1">#</span> <span class="c1"># DCX file handling</span> <span class="c1">#</span> <span class="c1"># DCX is a container file format defined by Intel, commonly used</span> <span class="c1"># for fax applications. Each DCX file consists of a directory</span> <span class="c1"># (a list of file offsets) followed by a set of (usually 1-bit)</span> <span class="c1"># PCX files.</span> <span class="c1">#</span> <span class="c1"># History:</span> <span class="c1"># 1995-09-09 fl Created</span> <span class="c1"># 1996-03-20 fl Properly derived from PcxImageFile.</span> <span class="c1"># 1998-07-15 fl Renamed offset attribute to avoid name clash</span> <span class="c1"># 2002-07-30 fl Fixed file handling</span> <span class="c1">#</span> <span class="c1"># Copyright (c) 1997-98 by Secret Labs AB.</span> <span class="c1"># Copyright (c) 1995-96 by Fredrik Lundh.</span> <span class="c1">#</span> <span class="c1"># See the README file for information on usage and redistribution.</span> <span class="c1">#</span> <span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">Image</span> <span class="kn">from</span> <span class="nn">._binary</span> <span class="k">import</span> <span class="n">i32le</span> <span class="k">as</span> <span class="n">i32</span> <span class="kn">from</span> <span class="nn">.PcxImagePlugin</span> <span class="k">import</span> <span class="n">PcxImageFile</span> <span class="n">__version__</span> <span class="o">=</span> <span class="s2">"0.2"</span> <span class="n">MAGIC</span> <span class="o">=</span> <span class="mh">0x3ADE68B1</span> <span class="c1"># QUIZ: what's this value, then?</span> <span class="k">def</span> <span class="nf">_accept</span><span class="p">(</span><span class="n">prefix</span><span class="p">):</span> <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span> <span class="o">>=</span> <span class="mi">4</span> <span class="ow">and</span> <span class="n">i32</span><span class="p">(</span><span class="n">prefix</span><span class="p">)</span> <span class="o">==</span> <span class="n">MAGIC</span> <span class="c1">##</span> <span class="c1"># Image plugin for the Intel DCX format.</span> <div class="viewcode-block" id="DcxImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.DcxImagePlugin.DcxImageFile">[docs]</a><span class="k">class</span> <span class="nc">DcxImageFile</span><span class="p">(</span><span class="n">PcxImageFile</span><span class="p">):</span> <span class="nb">format</span> <span class="o">=</span> <span class="s2">"DCX"</span> <span class="n">format_description</span> <span class="o">=</span> <span class="s2">"Intel DCX"</span> <span class="n">_close_exclusive_fp_after_loading</span> <span class="o">=</span> <span class="kc">False</span> <span class="k">def</span> <span class="nf">_open</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="c1"># Header</span> <span class="n">s</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">)</span> <span class="k">if</span> <span class="n">i32</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> <span class="o">!=</span> <span class="n">MAGIC</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"not a DCX file"</span><span class="p">)</span> <span class="c1"># Component directory</span> <span class="bp">self</span><span class="o">.</span><span class="n">_offset</span> <span class="o">=</span> <span class="p">[]</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1024</span><span class="p">):</span> <span class="n">offset</span> <span class="o">=</span> <span class="n">i32</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="mi">4</span><span class="p">))</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">offset</span><span class="p">:</span> <span class="k">break</span> <span class="bp">self</span><span class="o">.</span><span class="n">_offset</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">offset</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="bp">self</span><span class="o">.</span><span class="n">frame</span> <span class="o">=</span> <span class="kc">None</span> <span class="bp">self</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span> <span class="nd">@property</span> <span class="k">def</span> <span class="nf">n_frames</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_offset</span><span class="p">)</span> <span class="nd">@property</span> <span class="k">def</span> <span class="nf">is_animated</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_offset</span><span class="p">)</span> <span class="o">></span> <span class="mi">1</span> <div class="viewcode-block" id="DcxImageFile.seek"><a class="viewcode-back" href="../../reference/plugins.html#PIL.DcxImagePlugin.DcxImageFile.seek">[docs]</a> <span class="k">def</span> <span class="nf">seek</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">frame</span><span class="p">):</span> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_seek_check</span><span class="p">(</span><span class="n">frame</span><span class="p">):</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">frame</span> <span class="o">=</span> <span class="n">frame</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_offset</span><span class="p">[</span><span class="n">frame</span><span class="p">])</span> <span class="n">PcxImageFile</span><span class="o">.</span><span class="n">_open</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span></div> <div class="viewcode-block" id="DcxImageFile.tell"><a class="viewcode-back" href="../../reference/plugins.html#PIL.DcxImagePlugin.DcxImageFile.tell">[docs]</a> <span class="k">def</span> <span class="nf">tell</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">frame</span></div> <span class="k">def</span> <span class="nf">_close__fp</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="k">try</span><span class="p">:</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fp</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span><span class="o">.</span><span class="n">close</span><span class="p">()</span> <span class="k">except</span> <span class="ne">AttributeError</span><span class="p">:</span> <span class="k">pass</span> <span class="k">finally</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">__fp</span> <span class="o">=</span> <span class="kc">None</span></div> <span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">DcxImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">DcxImageFile</span><span class="p">,</span> <span class="n">_accept</span><span class="p">)</span> <span class="n">Image</span><span class="o">.</span><span class="n">register_extension</span><span class="p">(</span><span class="n">DcxImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">".dcx"</span><span class="p">)</span> </pre></div> </div> </div> <footer> <hr/> <div role="contentinfo"> <p> © Copyright 1995-2011 Fredrik Lundh, 2010-2018 Alex Clark and Contributors </p> </div> Built with <a href="http://sphinx-doc.org/">Sphinx</a> using a <a href="https://github.com/rtfd/sphinx_rtd_theme">theme</a> provided by <a href="https://readthedocs.org">Read the Docs</a>. </footer> </div> </div> </section> </div> <script type="text/javascript"> jQuery(function () { SphinxRtdTheme.Navigation.enable(true); }); </script> </body> </html>