LaTeX to PNG formulas converter

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dev-master 2013-06-05 18:06 UTC

This package is auto-updated.

Last update: 2023-02-24 01:13:05 UTC


GregwarTex2pngBundle provides a service and a twig helper to convert Tex formulas to PNG images


Step 1: Download the GregwarTex2pngBundle

Using the vendors script

Add the following lines to your deps file:


Now, run the vendors script to download the bundle:

$ php bin/vendors install

Using submodules

If you prefer instead to use git submodules, then run the following:

$ git submodule add git:// vendor/bundles/Gregwar/Tex2pngBundle
$ git submodule update --init

Using Composer

Add the following to the "require" section of your composer.json file:

    "gregwar/tex2png-bundle": "1.0.0"

And update your dependencies

    php composer.phar update

Step 2: Configure the Autoloader

If you use composer, you can skip this step.

Add it to your autoload.pp :

'Gregwar' => __DIR__.'/../vendor/bundles',

Step 3: Enable the bundle

Registers the bundle in your app/AppKernel.php:

public function registerBundles()
    $bundles = array(
        new Gregwar\Tex2pngBundle\GregwarTex2pngBundle(),

Step 4: Configure the bundle and set up the directories

Adds the following configuration to your app/config/config.yml:

gregwar_tex2png: ~

If you want to customize the cache directory name, you can specify it:

    cache_dir:  my_cache_dir

Creates the cache directory and change the permissions so the web server can write in it:

mkdir web/cache
chmod 777 web/cache



This bundle is based on the Gregwar's Tex2png class and provides a service and a twig extension :

<img src="{{ tex('\\sum_{i=0}^{i=n} i') }}" />

The PNG image will be generated using the formula and cached into a file. If this file already exists, it will do nothing else but just lookup for the good file name.

Note that you can use the tex_img twig function to generate the whole HTML tag :

{{ tex_img('\\sum_{i=0}^{i=n} i') }}

If you want to change the density (resolution) of the image, you can specify it as a second argument (defaults: 155) :

{{ tex_img('\\sum_{i=0}^{i=n} i', 300) }}

Using the service

Twig2pngBundle provides a servie that can be used to generate tex files directly from your own logics :

$this->get('tex2png')->create('\sum_{i=0}^{i=n} i')


GregwarTex2pngBundle need you to have latex and dvipng installed, a temporary directory, and the shell_exec() PHP function should be available and useable.


This bundle is under MIT license