ImageToPicture

Module for Processwire that adds a new Pageimage method for rendering proper picture element markup from a given image.

Usage

You can call the toPicture() method on any image in Processwire like this:

$image->toPicture();

There are some options available to define queries and image sizes. These are the defaults:

$image->toPicture(array(
  'fallback' => 450, // width for fallback image
  'altText' => '', // alternative text (default is image description)
  'sources' => array(
    '(min-width: 64em)' => 600, // queries and image widths
    '(min-width: 45em)' => 520 
  )
));

Default options can now be set via the module configuration page.

Using toPicture() without any options renders the following output:

<picture>
  <source media="(min-width: 64em)" srcset="img-600px.jpg">
  <source media="(min-width: 45em)" srcset="img-520px.jpg">
  <img src="img-450px.jpg" alt="Image description">
</picture>

A customised call might look like this:

$image->toPicture(array(
  'fallback' => 300,
  'altText' => 'My new description',
  'sources' => array(
    '(min-width: 55em)' => 860,
    '(min-width: 27em)' => 450 
  )
));

Which produces:

<picture>
  <source media="(min-width: 55em)" srcset="img-860px.jpg">
  <source media="(min-width: 27em)" srcset="img-450px.jpg">
  <img src="img-300px.jpg" alt="My new description">
</picture>