<!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.MspImagePlugin — 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.MspImagePlugin</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.MspImagePlugin</h1><div class="highlight"><pre> <span></span><span class="c1">#</span> <span class="c1"># The Python Imaging Library.</span> <span class="c1">#</span> <span class="c1"># MSP file handling</span> <span class="c1">#</span> <span class="c1"># This is the format used by the Paint program in Windows 1 and 2.</span> <span class="c1">#</span> <span class="c1"># History:</span> <span class="c1"># 95-09-05 fl Created</span> <span class="c1"># 97-01-03 fl Read/write MSP images</span> <span class="c1"># 17-02-21 es Fixed RLE interpretation</span> <span class="c1">#</span> <span class="c1"># Copyright (c) Secret Labs AB 1997.</span> <span class="c1"># Copyright (c) Fredrik Lundh 1995-97.</span> <span class="c1"># Copyright (c) Eric Soroos 2017.</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="c1"># More info on this format: https://archive.org/details/gg243631</span> <span class="c1"># Page 313:</span> <span class="c1"># Figure 205. Windows Paint Version 1: "DanM" Format</span> <span class="c1"># Figure 206. Windows Paint Version 2: "LinS" Format. Used in Windows V2.03</span> <span class="c1">#</span> <span class="c1"># See also: http://www.fileformat.info/format/mspaint/egff.htm</span> <span class="kn">from</span> <span class="nn">.</span> <span class="k">import</span> <span class="n">Image</span><span class="p">,</span> <span class="n">ImageFile</span> <span class="kn">from</span> <span class="nn">._binary</span> <span class="k">import</span> <span class="n">i16le</span> <span class="k">as</span> <span class="n">i16</span><span class="p">,</span> <span class="n">o16le</span> <span class="k">as</span> <span class="n">o16</span><span class="p">,</span> <span class="n">i8</span> <span class="kn">import</span> <span class="nn">struct</span> <span class="kn">import</span> <span class="nn">io</span> <span class="n">__version__</span> <span class="o">=</span> <span class="s2">"0.1"</span> <span class="c1">#</span> <span class="c1"># read MSP files</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="n">prefix</span><span class="p">[:</span><span class="mi">4</span><span class="p">]</span> <span class="ow">in</span> <span class="p">[</span><span class="sa">b</span><span class="s2">"DanM"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"LinS"</span><span class="p">]</span> <span class="c1">##</span> <span class="c1"># Image plugin for Windows MSP images. This plugin supports both</span> <span class="c1"># uncompressed (Windows 1.0).</span> <div class="viewcode-block" id="MspImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.MspImagePlugin.MspImageFile">[docs]</a><span class="k">class</span> <span class="nc">MspImageFile</span><span class="p">(</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">ImageFile</span><span class="p">):</span> <span class="nb">format</span> <span class="o">=</span> <span class="s2">"MSP"</span> <span class="n">format_description</span> <span class="o">=</span> <span class="s2">"Windows Paint"</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">32</span><span class="p">)</span> <span class="k">if</span> <span class="n">s</span><span class="p">[:</span><span class="mi">4</span><span class="p">]</span> <span class="ow">not</span> <span class="ow">in</span> <span class="p">[</span><span class="sa">b</span><span class="s2">"DanM"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"LinS"</span><span class="p">]:</span> <span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"not an MSP file"</span><span class="p">)</span> <span class="c1"># Header checksum</span> <span class="n">checksum</span> <span class="o">=</span> <span class="mi">0</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">0</span><span class="p">,</span> <span class="mi">32</span><span class="p">,</span> <span class="mi">2</span><span class="p">):</span> <span class="n">checksum</span> <span class="o">=</span> <span class="n">checksum</span> <span class="o">^</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="n">i</span><span class="p">:</span><span class="n">i</span><span class="o">+</span><span class="mi">2</span><span class="p">])</span> <span class="k">if</span> <span class="n">checksum</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"bad MSP checksum"</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">mode</span> <span class="o">=</span> <span class="s2">"1"</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">4</span><span class="p">:]),</span> <span class="n">i16</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="mi">6</span><span class="p">:])</span> <span class="k">if</span> <span class="n">s</span><span class="p">[:</span><span class="mi">4</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"DanM"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"raw"</span><span class="p">,</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span><span class="o">+</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="mi">32</span><span class="p">,</span> <span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">))]</span> <span class="k">else</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">tile</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"MSP"</span><span class="p">,</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span><span class="o">+</span><span class="bp">self</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="mi">32</span><span class="p">,</span> <span class="kc">None</span><span class="p">)]</span></div> <div class="viewcode-block" id="MspDecoder"><a class="viewcode-back" href="../../reference/plugins.html#PIL.MspImagePlugin.MspDecoder">[docs]</a><span class="k">class</span> <span class="nc">MspDecoder</span><span class="p">(</span><span class="n">ImageFile</span><span class="o">.</span><span class="n">PyDecoder</span><span class="p">):</span> <span class="c1"># The algo for the MSP decoder is from</span> <span class="c1"># http://www.fileformat.info/format/mspaint/egff.htm</span> <span class="c1"># cc-by-attribution -- That page references is taken from the</span> <span class="c1"># Encyclopedia of Graphics File Formats and is licensed by</span> <span class="c1"># O'Reilly under the Creative Common/Attribution license</span> <span class="c1">#</span> <span class="c1"># For RLE encoded files, the 32byte header is followed by a scan</span> <span class="c1"># line map, encoded as one 16bit word of encoded byte length per</span> <span class="c1"># line.</span> <span class="c1">#</span> <span class="c1"># NOTE: the encoded length of the line can be 0. This was not</span> <span class="c1"># handled in the previous version of this encoder, and there's no</span> <span class="c1"># mention of how to handle it in the documentation. From the few</span> <span class="c1"># examples I've seen, I've assumed that it is a fill of the</span> <span class="c1"># background color, in this case, white.</span> <span class="c1">#</span> <span class="c1">#</span> <span class="c1"># Pseudocode of the decoder:</span> <span class="c1"># Read a BYTE value as the RunType</span> <span class="c1"># If the RunType value is zero</span> <span class="c1"># Read next byte as the RunCount</span> <span class="c1"># Read the next byte as the RunValue</span> <span class="c1"># Write the RunValue byte RunCount times</span> <span class="c1"># If the RunType value is non-zero</span> <span class="c1"># Use this value as the RunCount</span> <span class="c1"># Read and write the next RunCount bytes literally</span> <span class="c1">#</span> <span class="c1"># e.g.:</span> <span class="c1"># 0x00 03 ff 05 00 01 02 03 04</span> <span class="c1"># would yield the bytes:</span> <span class="c1"># 0xff ff ff 00 01 02 03 04</span> <span class="c1">#</span> <span class="c1"># which are then interpreted as a bit packed mode '1' image</span> <span class="n">_pulls_fd</span> <span class="o">=</span> <span class="kc">True</span> <div class="viewcode-block" id="MspDecoder.decode"><a class="viewcode-back" href="../../reference/plugins.html#PIL.MspImagePlugin.MspDecoder.decode">[docs]</a> <span class="k">def</span> <span class="nf">decode</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">buffer</span><span class="p">):</span> <span class="n">img</span> <span class="o">=</span> <span class="n">io</span><span class="o">.</span><span class="n">BytesIO</span><span class="p">()</span> <span class="n">blank_line</span> <span class="o">=</span> <span class="nb">bytearray</span><span class="p">((</span><span class="mh">0xff</span><span class="p">,)</span><span class="o">*</span><span class="p">((</span><span class="bp">self</span><span class="o">.</span><span class="n">state</span><span class="o">.</span><span class="n">xsize</span><span class="o">+</span><span class="mi">7</span><span class="p">)</span><span class="o">//</span><span class="mi">8</span><span class="p">))</span> <span class="k">try</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">fd</span><span class="o">.</span><span class="n">seek</span><span class="p">(</span><span class="mi">32</span><span class="p">)</span> <span class="n">rowmap</span> <span class="o">=</span> <span class="n">struct</span><span class="o">.</span><span class="n">unpack_from</span><span class="p">(</span><span class="s2">"<</span><span class="si">%d</span><span class="s2">H"</span> <span class="o">%</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">state</span><span class="o">.</span><span class="n">ysize</span><span class="p">),</span> <span class="bp">self</span><span class="o">.</span><span class="n">fd</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">state</span><span class="o">.</span><span class="n">ysize</span><span class="o">*</span><span class="mi">2</span><span class="p">))</span> <span class="k">except</span> <span class="n">struct</span><span class="o">.</span><span class="n">error</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"Truncated MSP file in row map"</span><span class="p">)</span> <span class="k">for</span> <span class="n">x</span><span class="p">,</span> <span class="n">rowlen</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">rowmap</span><span class="p">):</span> <span class="k">try</span><span class="p">:</span> <span class="k">if</span> <span class="n">rowlen</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> <span class="n">img</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">blank_line</span><span class="p">)</span> <span class="k">continue</span> <span class="n">row</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">fd</span><span class="o">.</span><span class="n">read</span><span class="p">(</span><span class="n">rowlen</span><span class="p">)</span> <span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">row</span><span class="p">)</span> <span class="o">!=</span> <span class="n">rowlen</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span> <span class="s2">"Truncated MSP file, expected </span><span class="si">%d</span><span class="s2"> bytes on row </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="p">(</span><span class="n">rowlen</span><span class="p">,</span> <span class="n">x</span><span class="p">))</span> <span class="n">idx</span> <span class="o">=</span> <span class="mi">0</span> <span class="k">while</span> <span class="n">idx</span> <span class="o"><</span> <span class="n">rowlen</span><span class="p">:</span> <span class="n">runtype</span> <span class="o">=</span> <span class="n">i8</span><span class="p">(</span><span class="n">row</span><span class="p">[</span><span class="n">idx</span><span class="p">])</span> <span class="n">idx</span> <span class="o">+=</span> <span class="mi">1</span> <span class="k">if</span> <span class="n">runtype</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> <span class="p">(</span><span class="n">runcount</span><span class="p">,</span> <span class="n">runval</span><span class="p">)</span> <span class="o">=</span> <span class="n">struct</span><span class="o">.</span><span class="n">unpack_from</span><span class="p">(</span><span class="s2">"Bc"</span><span class="p">,</span> <span class="n">row</span><span class="p">,</span> <span class="n">idx</span><span class="p">)</span> <span class="n">img</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">runval</span> <span class="o">*</span> <span class="n">runcount</span><span class="p">)</span> <span class="n">idx</span> <span class="o">+=</span> <span class="mi">2</span> <span class="k">else</span><span class="p">:</span> <span class="n">runcount</span> <span class="o">=</span> <span class="n">runtype</span> <span class="n">img</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">row</span><span class="p">[</span><span class="n">idx</span><span class="p">:</span><span class="n">idx</span><span class="o">+</span><span class="n">runcount</span><span class="p">])</span> <span class="n">idx</span> <span class="o">+=</span> <span class="n">runcount</span> <span class="k">except</span> <span class="n">struct</span><span class="o">.</span><span class="n">error</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"Corrupted MSP file in row </span><span class="si">%d</span><span class="s2">"</span> <span class="o">%</span> <span class="n">x</span><span class="p">)</span> <span class="bp">self</span><span class="o">.</span><span class="n">set_as_raw</span><span class="p">(</span><span class="n">img</span><span class="o">.</span><span class="n">getvalue</span><span class="p">(),</span> <span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">))</span> <span class="k">return</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span></div></div> <span class="n">Image</span><span class="o">.</span><span class="n">register_decoder</span><span class="p">(</span><span class="s1">'MSP'</span><span class="p">,</span> <span class="n">MspDecoder</span><span class="p">)</span> <span class="c1">#</span> <span class="c1"># write MSP files (uncompressed only)</span> <span class="k">def</span> <span class="nf">_save</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span> <span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">!=</span> <span class="s2">"1"</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">IOError</span><span class="p">(</span><span class="s2">"cannot write mode </span><span class="si">%s</span><span class="s2"> as MSP"</span> <span class="o">%</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span><span class="p">)</span> <span class="c1"># create MSP header</span> <span class="n">header</span> <span class="o">=</span> <span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">*</span> <span class="mi">16</span> <span class="n">header</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">header</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="n">i16</span><span class="p">(</span><span class="sa">b</span><span class="s2">"Da"</span><span class="p">),</span> <span class="n">i16</span><span class="p">(</span><span class="sa">b</span><span class="s2">"nM"</span><span class="p">)</span> <span class="c1"># version 1</span> <span class="n">header</span><span class="p">[</span><span class="mi">2</span><span class="p">],</span> <span class="n">header</span><span class="p">[</span><span class="mi">3</span><span class="p">]</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span> <span class="n">header</span><span class="p">[</span><span class="mi">4</span><span class="p">],</span> <span class="n">header</span><span class="p">[</span><span class="mi">5</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span> <span class="n">header</span><span class="p">[</span><span class="mi">6</span><span class="p">],</span> <span class="n">header</span><span class="p">[</span><span class="mi">7</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span> <span class="n">header</span><span class="p">[</span><span class="mi">8</span><span class="p">],</span> <span class="n">header</span><span class="p">[</span><span class="mi">9</span><span class="p">]</span> <span class="o">=</span> <span class="n">im</span><span class="o">.</span><span class="n">size</span> <span class="n">checksum</span> <span class="o">=</span> <span class="mi">0</span> <span class="k">for</span> <span class="n">h</span> <span class="ow">in</span> <span class="n">header</span><span class="p">:</span> <span class="n">checksum</span> <span class="o">=</span> <span class="n">checksum</span> <span class="o">^</span> <span class="n">h</span> <span class="n">header</span><span class="p">[</span><span class="mi">12</span><span class="p">]</span> <span class="o">=</span> <span class="n">checksum</span> <span class="c1"># FIXME: is this the right field?</span> <span class="c1"># header</span> <span class="k">for</span> <span class="n">h</span> <span class="ow">in</span> <span class="n">header</span><span class="p">:</span> <span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">o16</span><span class="p">(</span><span class="n">h</span><span class="p">))</span> <span class="c1"># image body</span> <span class="n">ImageFile</span><span class="o">.</span><span class="n">_save</span><span class="p">(</span><span class="n">im</span><span class="p">,</span> <span class="n">fp</span><span class="p">,</span> <span class="p">[(</span><span class="s2">"raw"</span><span class="p">,</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">)</span><span class="o">+</span><span class="n">im</span><span class="o">.</span><span class="n">size</span><span class="p">,</span> <span class="mi">32</span><span class="p">,</span> <span class="p">(</span><span class="s2">"1"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">))])</span> <span class="c1">#</span> <span class="c1"># registry</span> <span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">MspImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">MspImageFile</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_save</span><span class="p">(</span><span class="n">MspImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">_save</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">MspImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="s2">".msp"</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 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