Getting the unique cropped image thumnails

I don’t know if the answer is here, but there are a couple Actions/Filters related to thumbnails here:

https://docs.fooplugins.com/foogallery/actions-filters/

I tried using this filter in my functions.php file:
add_filter( 'wp_get_attachment_image_src' , 'foogallery_attachment_html_image', 10 , 2 );

However I’m fairly new in using filters and this filter doesn’t return any results to my website.

I get my image url’s through the following code: wp_get_attachment_image_src($attachment->ID, 'full')[0]

you can see how it is done in the files includes/class-thumbnails.php

You would have to do something like this:

$image_url = wp_get_attachment_image_src($attachment->ID, 'full')[0];

$args = array(
   'width'  => 300,
   'height' => 300,
   'crop'   => true
);

return wpthumb( $image_url , $args );

Thanks bradvin, that did the trick!

This is the source code on how to show the latest 6 media images added to a wordpress website:
Place this in your custom-theme-template file:

<?php
                      $args = array(
                          'post_type' => 'attachment',
                          'numberposts' => 6,
                          'post_status' => null
                      );
                      $attachments = get_posts( $args );
                         if ( $attachments ) {
                             ?>
                             <div id="foogallery-gallery-000" class="foogallery-container foogallery-default foogallery-link-image foogallery-lightbox-foobox-free spacing-width-25 hover-effect-zoom border-style-square-white alignment-center fbx-instance">
                             <?php
                             foreach ( $attachments as $attachment ) {
                                 ?><a href="<?php echo wp_get_attachment_image_src($attachment->ID, 'full')[0]; ?>" data-attachment-id="<?php echo $attachment->ID ?>" class="fbx-link"><img src="<?php echo cropped_image($attachment->ID); ?>" width="210px" height="210px"></a><?php
                             }
                             ?>
                             <div style="clear:both"></div>
                             </div>
                            <?php
                         }
                    ?>

Place this in your function.php file:

function cropped_image($attachment){
        $image_url = wp_get_attachment_image_src($attachment, 'full')[0];

        $args = array(
            'width'  => 300,
            'height' => 300,
            'crop'   => true
        );

        return wpthumb( $image_url , $args );
    }

Note that this code only works if you include the foogallery stylesheet in your theme.