PDF Renderer

Convert PDF Files to Images in your browser when dropped into the media library.

Includes Mozilla pdf.js for browser pdf rendering.

PDF-Contents: cc-by Creative Commons

Installation

Production

• Head over to releases
• Download 'pdf-renderer.zip'
• Upload and activate it like any other WordPress plugin
• AutoUpdate will run as long as the plugin is active

Using composer

composer require mcguffin/pdf-renderer

For Development

• cd into your plugin directory
• $ git clone git@github.com:mcguffin/pdf-renderer.git
• $ cd pdf-renderer
• $ npm install
• $ npm run dev

Plugin API

Filter pdf_renderer_image_width

Use this to overrule width of generated images. Uses the largest image width known to WP by default. (e.g. the Large size from Settings > Media).

Example:

add_filter( 'pdf_renderer_image_width', function( $width ) {
	// never underestimate a good integer.
	return 12345;
});

Filter pdf_renderer_image_type

Type of generated images. Possible values are image/png and image/jpeg. default is image/png.
To override the JPEG-Quality you can use the WP Core filter jpeg_quality. The string pdf_renderer is passed as a second argument to apply_filters().

Example:

// we want jpeg ...
add_filter( 'pdf_renderer_image_type', function( $type ) {
	return 'image/jpeg';
});
// ... and a specific treatment for PDFs.
add_filter( 'jpeg_quality', function( $quality, $context = '' ) {
	if ( 'pdf_renderer' === $context ) {
		// Everybody loves artifacts.
		return 1;
	}
	return $quality;
}, 10, 2);

Development

npm scripts:

• npm run audit: Run phpcs audit
• npm run build: Build css and js from sources
• npm run dev: Watch css and js source dirs
• npm run dashicons: Generate dashicons scss variables from source
• npm run i18n: generate .pot file
• npm run rollback: remove last commit (local and remote – use with caution!)
• npm run test: run unit tests against PHP 7.4 and 8.3
• npm run test:edge: run unit tests against PHP 8.3 only
• npm run test:legacy: run unit tests against PHP 7.4 only

Testing

Unit Tests

Unit tests are run in wordpress/env, which is basically a docker container. Docker Desktop is required.

Unit tests are run against PHP 7.4 (legacy) and 8.3 (edge).

Run them all:

npm run test

Run edge tests only:

npm run test:edge

Configure edge test and run something in wp-cli in the docker container:

npm run test:set-edge
npm run test:reset-env
wp-env run cli wp core version
> 6.7.1