<!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.PpmImagePlugin — 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.PpmImagePlugin</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.PpmImagePlugin</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"># PPM support for PIL</span> <span class="c1">#</span> <span class="c1"># History:</span> <span class="c1"># 96-03-24 fl Created</span> <span class="c1"># 98-03-06 fl Write RGBA images (as RGB, that is)</span> <span class="c1">#</span> <span class="c1"># Copyright (c) Secret Labs AB 1997-98.</span> <span class="c1"># Copyright (c) Fredrik Lundh 1996.</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="p">,</span> <span class="n">ImageFile</span> <span class="n">__version__</span> <span class="o">=</span> <span class="s2">"0.2"</span> <span class="c1">#</span> <span class="c1"># --------------------------------------------------------------------</span> <span class="n">b_whitespace</span> <span class="o">=</span> <span class="sa">b</span><span class="s1">'</span><span class="se">\x20\x09\x0a\x0b\x0c\x0d</span><span class="s1">'</span> <span class="n">MODES</span> <span class="o">=</span> <span class="p">{</span> <span class="c1"># standard</span> <span class="sa">b</span><span class="s2">"P4"</span><span class="p">:</span> <span class="s2">"1"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P5"</span><span class="p">:</span> <span class="s2">"L"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P6"</span><span class="p">:</span> <span class="s2">"RGB"</span><span class="p">,</span> <span class="c1"># extensions</span> <span class="sa">b</span><span class="s2">"P0CMYK"</span><span class="p">:</span> <span class="s2">"CMYK"</span><span class="p">,</span> <span class="c1"># PIL extensions (for test purposes only)</span> <span class="sa">b</span><span class="s2">"PyP"</span><span class="p">:</span> <span class="s2">"P"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"PyRGBA"</span><span class="p">:</span> <span class="s2">"RGBA"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"PyCMYK"</span><span class="p">:</span> <span class="s2">"CMYK"</span> <span class="p">}</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">0</span><span class="p">:</span><span class="mi">1</span><span class="p">]</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"P"</span> <span class="ow">and</span> <span class="n">prefix</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="ow">in</span> <span class="sa">b</span><span class="s2">"0456y"</span> <span class="c1">##</span> <span class="c1"># Image plugin for PBM, PGM, and PPM images.</span> <div class="viewcode-block" id="PpmImageFile"><a class="viewcode-back" href="../../reference/plugins.html#PIL.PpmImagePlugin.PpmImageFile">[docs]</a><span class="k">class</span> <span class="nc">PpmImageFile</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">"PPM"</span> <span class="n">format_description</span> <span class="o">=</span> <span class="s2">"Pbmplus image"</span> <span class="k">def</span> <span class="nf">_token</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">s</span><span class="o">=</span><span class="sa">b</span><span class="s2">""</span><span class="p">):</span> <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> <span class="c1"># read until next whitespace</span> <span class="n">c</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">1</span><span class="p">)</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">c</span> <span class="ow">or</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">b_whitespace</span><span class="p">:</span> <span class="k">break</span> <span class="k">if</span> <span class="n">c</span> <span class="o">></span> <span class="sa">b</span><span class="s1">'</span><span class="se">\x79</span><span class="s1">'</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Expected ASCII value, found binary"</span><span class="p">)</span> <span class="n">s</span> <span class="o">=</span> <span class="n">s</span> <span class="o">+</span> <span class="n">c</span> <span class="k">if</span> <span class="p">(</span><span class="nb">len</span><span class="p">(</span><span class="n">s</span><span class="p">)</span> <span class="o">></span> <span class="mi">9</span><span class="p">):</span> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Expected int, got > 9 digits"</span><span class="p">)</span> <span class="k">return</span> <span class="n">s</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"># check magic</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">1</span><span class="p">)</span> <span class="k">if</span> <span class="n">s</span> <span class="o">!=</span> <span class="sa">b</span><span class="s2">"P"</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">SyntaxError</span><span class="p">(</span><span class="s2">"not a PPM file"</span><span class="p">)</span> <span class="n">mode</span> <span class="o">=</span> <span class="n">MODES</span><span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_token</span><span class="p">(</span><span class="n">s</span><span class="p">)]</span> <span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s2">"1"</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="n">rawmode</span> <span class="o">=</span> <span class="s2">"1;I"</span> <span class="k">else</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="n">rawmode</span> <span class="o">=</span> <span class="n">mode</span> <span class="k">for</span> <span class="n">ix</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">3</span><span class="p">):</span> <span class="k">while</span> <span class="kc">True</span><span class="p">:</span> <span class="k">while</span> <span class="kc">True</span><span class="p">:</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">1</span><span class="p">)</span> <span class="k">if</span> <span class="n">s</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">b_whitespace</span><span class="p">:</span> <span class="k">break</span> <span class="k">if</span> <span class="n">s</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">""</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span> <span class="s2">"File does not extend beyond magic number"</span><span class="p">)</span> <span class="k">if</span> <span class="n">s</span> <span class="o">!=</span> <span class="sa">b</span><span class="s2">"#"</span><span class="p">:</span> <span class="k">break</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">readline</span><span class="p">()</span> <span class="n">s</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_token</span><span class="p">(</span><span class="n">s</span><span class="p">))</span> <span class="k">if</span> <span class="n">ix</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span> <span class="n">xsize</span> <span class="o">=</span> <span class="n">s</span> <span class="k">elif</span> <span class="n">ix</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span> <span class="n">ysize</span> <span class="o">=</span> <span class="n">s</span> <span class="k">if</span> <span class="n">mode</span> <span class="o">==</span> <span class="s2">"1"</span><span class="p">:</span> <span class="k">break</span> <span class="k">elif</span> <span class="n">ix</span> <span class="o">==</span> <span class="mi">2</span><span class="p">:</span> <span class="c1"># maxgrey</span> <span class="k">if</span> <span class="n">s</span> <span class="o">></span> <span class="mi">255</span><span class="p">:</span> <span class="k">if</span> <span class="ow">not</span> <span class="n">mode</span> <span class="o">==</span> <span class="s1">'L'</span><span class="p">:</span> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="s2">"Too many colors for band: </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">s</span><span class="p">)</span> <span class="k">if</span> <span class="n">s</span> <span class="o"><</span> <span class="mi">2</span><span class="o">**</span><span class="mi">16</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="s1">'I'</span> <span class="n">rawmode</span> <span class="o">=</span> <span class="s1">'I;16B'</span> <span class="k">else</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="s1">'I'</span> <span class="n">rawmode</span> <span class="o">=</span> <span class="s1">'I;32B'</span> <span class="bp">self</span><span class="o">.</span><span class="n">_size</span> <span class="o">=</span> <span class="n">xsize</span><span class="p">,</span> <span class="n">ysize</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="n">xsize</span><span class="p">,</span> <span class="n">ysize</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">tell</span><span class="p">(),</span> <span class="p">(</span><span class="n">rawmode</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">))]</span></div> <span class="c1">#</span> <span class="c1"># --------------------------------------------------------------------</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="n">rawmode</span><span class="p">,</span> <span class="n">head</span> <span class="o">=</span> <span class="s2">"1;I"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P4"</span> <span class="k">elif</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s2">"L"</span><span class="p">:</span> <span class="n">rawmode</span><span class="p">,</span> <span class="n">head</span> <span class="o">=</span> <span class="s2">"L"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P5"</span> <span class="k">elif</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s2">"I"</span><span class="p">:</span> <span class="k">if</span> <span class="n">im</span><span class="o">.</span><span class="n">getextrema</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span> <span class="o"><</span> <span class="mi">2</span><span class="o">**</span><span class="mi">16</span><span class="p">:</span> <span class="n">rawmode</span><span class="p">,</span> <span class="n">head</span> <span class="o">=</span> <span class="s2">"I;16B"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P5"</span> <span class="k">else</span><span class="p">:</span> <span class="n">rawmode</span><span class="p">,</span> <span class="n">head</span> <span class="o">=</span> <span class="s2">"I;32B"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P5"</span> <span class="k">elif</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s2">"RGB"</span><span class="p">:</span> <span class="n">rawmode</span><span class="p">,</span> <span class="n">head</span> <span class="o">=</span> <span class="s2">"RGB"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P6"</span> <span class="k">elif</span> <span class="n">im</span><span class="o">.</span><span class="n">mode</span> <span class="o">==</span> <span class="s2">"RGBA"</span><span class="p">:</span> <span class="n">rawmode</span><span class="p">,</span> <span class="n">head</span> <span class="o">=</span> <span class="s2">"RGB"</span><span class="p">,</span> <span class="sa">b</span><span class="s2">"P6"</span> <span class="k">else</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 PPM"</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="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">head</span> <span class="o">+</span> <span class="p">(</span><span class="s2">"</span><span class="se">\n</span><span class="si">%d</span><span class="s2"> </span><span class="si">%d</span><span class="se">\n</span><span class="s2">"</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="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'ascii'</span><span class="p">))</span> <span class="k">if</span> <span class="n">head</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"P6"</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="sa">b</span><span class="s2">"255</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="k">if</span> <span class="n">head</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">"P5"</span><span class="p">:</span> <span class="k">if</span> <span class="n">rawmode</span> <span class="o">==</span> <span class="s2">"L"</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="sa">b</span><span class="s2">"255</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="k">elif</span> <span class="n">rawmode</span> <span class="o">==</span> <span class="s2">"I;16B"</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="sa">b</span><span class="s2">"65535</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</span> <span class="k">elif</span> <span class="n">rawmode</span> <span class="o">==</span> <span class="s2">"I;32B"</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="sa">b</span><span class="s2">"2147483648</span><span class="se">\n</span><span class="s2">"</span><span class="p">)</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">0</span><span class="p">,</span> <span class="p">(</span><span class="n">rawmode</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"># ALTERNATIVE: save via builtin debug function</span> <span class="c1"># im._dump(filename)</span> <span class="c1">#</span> <span class="c1"># --------------------------------------------------------------------</span> <span class="n">Image</span><span class="o">.</span><span class="n">register_open</span><span class="p">(</span><span class="n">PpmImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="n">PpmImageFile</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">PpmImageFile</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_extensions</span><span class="p">(</span><span class="n">PpmImageFile</span><span class="o">.</span><span class="n">format</span><span class="p">,</span> <span class="p">[</span><span class="s2">".pbm"</span><span class="p">,</span> <span class="s2">".pgm"</span><span class="p">,</span> <span class="s2">".ppm"</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>