<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <link rel="stylesheet" href="../../../../static/styles.css?h=dff0aaad"> <link rel="stylesheet" href="../../../../static/pygments.css"> <link rel="shortcut icon" href="../../../../static/favicon.png?h=fa09bedd"> <title>process_image | Documentation | Lektor Static Content Management System</title> </head> <body class="default"> <nav class="navbar navbar-inverse navbar-static-top"> <div class="container"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <a class="navbar-brand" href="../../../../">Lektor</a> </div> <div id="navbar" class="collapse navbar-collapse"> <ul class="nav navbar-nav"> <li><a href="../../../../downloads/">Download</a></li> <li class="active"><a href="../../../">Documentation</a></li> <li><a href="../../../../showcase/">Showcase</a></li> <li><a href="../../../../plugins/">Plugins</a></li> <li><a href="../../../../community/">Community</a></li> <li><a href="../../../../blog/">Blog</a></li> </ul> </div> </div> </nav> <div class="body-wrapper"> <div class="container"> <div class="row"> <div class="col-sm-3"> <ul class="tree-nav nocontent"> <li><a href="../../../">Welcome</a></li> <li><a href="../../../what/">What is Lektor</a> <li><a href="../../../installation/">Installation</a> <li><a href="../../../quickstart/">Quickstart</a> <li><a href="../../../project/">Project</a> <li><a href="../../../content/">Content</a> <li><a href="../../../templates/">Templates</a> <li><a href="../../../themes/">Themes</a> <li><a href="../../../guides/">Guides</a> <li><a href="../../../deployment/">Deployment</a> <li><a href="../../../plugins/">Plugins</a> <li><a href="../../../models/">Data Modelling</a> <li><a href="../../../cli/">Command Line</a> <li><a href="../../">API</a> <ul> <li><a href="../../build/">Build System</a> <li><a href="../../databags/">Databags</a> <li><a href="../../db/">Database</a> <li><a href="../../environment/">Environment</a> <li><a href="../../plugins/">Plugins</a> <li><a href="../../project/">Project</a> <li><a href="../../publisher/">Publisher</a> <li><a href="../../templates/">Template API</a> <li><a href="../">Utilities</a> <ul> <li><a href="../build-url/">build_url()</a> <li><a href="../get-structure-hash/">get_structure_hash()</a> <li><a href="../join-path/">join_path()</a> <li><a href="../parse-path/">parse_path()</a> <li class="active"><a href="./">process_image()</a> <ul></ul> <li><a href="../url-to/">url_to()</a> </ul> </ul> <li><a href="../../../search/">Search</a> </ul> <div class="visible-md-block visible-lg-block"> <h4>This Page</h4> <ul class="toc"> <li><a href="#example">Example</a></li> </ul> </div> </div> <div class="col-sm-9 doc-styling"> <h1><i class="glyphicon glyphicon-cog"></i> <code class="mod">lektor.imagetools.</code><code class="obj">process_image</code> <span class="sig">(<code>ctx,</code> <code>source_image,</code> <code>dst_filename,</code> <code>width=None,</code> <code>height=None,</code> <code>mode=ThumbnailMode.DEFAULT</code>)</span></h1> <ul class=page-meta> <li>New in Lektor Version <em>2.0</em></li> </ul> <p>This function takes a <a href="../../build/context/" class="ref">Context</a> object, the absolute paths to the image's source and target files, the target image's width and/or height, and the operation mode. In the default mode, if width or height are <code>None</code>, they are calculated from the source image's dimensions so that the image is scaled proportionally.</p> <p>Used internally for the implementation of <a href="../../db/record/thumbnail/" class="ref">thumbnail</a>, and exposed as an API for image-processing plugins.</p> <h2 id="example">Example</h2><div class="hll"><pre><span></span><span class="kn">from</span> <span class="nn">lektor.build_programs</span> <span class="kn">import</span> <span class="n">AttachmentBuildProgram</span> <span class="kn">from</span> <span class="nn">lektor.context</span> <span class="kn">import</span> <span class="n">get_ctx</span> <span class="kn">from</span> <span class="nn">lektor.db</span> <span class="kn">import</span> <span class="n">Image</span> <span class="kn">from</span> <span class="nn">lektor.imagetools</span> <span class="kn">import</span> <span class="n">process_image</span><span class="p">,</span> <span class="n">ThumbnailMode</span> <span class="kn">from</span> <span class="nn">lektor.pluginsystem</span> <span class="kn">import</span> <span class="n">Plugin</span> <span class="k">class</span> <span class="nc">ImageCropBuildProgram</span><span class="p">(</span><span class="n">AttachmentBuildProgram</span><span class="p">):</span> <span class="k">def</span> <span class="nf">build_artifact</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">artifact</span><span class="p">):</span> <span class="n">ctx</span> <span class="o">=</span> <span class="n">get_ctx</span><span class="p">()</span> <span class="n">width</span><span class="p">,</span> <span class="n">height</span> <span class="o">=</span> <span class="mi">600</span><span class="p">,</span> <span class="mi">400</span> <span class="n">source_img</span> <span class="o">=</span> <span class="n">artifact</span><span class="o">.</span><span class="n">source_obj</span><span class="o">.</span><span class="n">attachment_filename</span> <span class="n">artifact</span><span class="o">.</span><span class="n">ensure_dir</span><span class="p">()</span> <span class="n">process_image</span><span class="p">(</span><span class="n">ctx</span><span class="p">,</span> <span class="n">source_img</span><span class="p">,</span> <span class="n">artifact</span><span class="o">.</span><span class="n">dst_filename</span><span class="p">,</span> <span class="n">width</span><span class="p">,</span> <span class="n">height</span><span class="p">,</span> <span class="n">mode</span><span class="o">=</span><span class="n">ThumbnailMode</span><span class="o">.</span><span class="n">CROP</span><span class="p">)</span> <span class="k">class</span> <span class="nc">ImageCropPlugin</span><span class="p">(</span><span class="n">Plugin</span><span class="p">):</span> <span class="k">def</span> <span class="nf">on_setup_env</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">**</span><span class="n">extra</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">env</span><span class="o">.</span><span class="n">add_build_program</span><span class="p">(</span><span class="n">Image</span><span class="p">,</span> <span class="n">ImageCropBuildProgram</span><span class="p">)</span> </pre></div> <div class="comment-box"> <h2>Comments</h2> <div id="disqus_thread"></div> <script> var disqus_config = function() { this.page.identifier = "/docs/api/utils/process-image"; 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