tested with a completely clean dw install with just the default plugins (including wrap) and dw2pdf
Exporting the wiki:welcome page to pdf results in a pdf
... but it takes 2 minutes to create the export
adding an image results in a pdf with an image
... but it takes 2 minutes to create the export
adding 2 wrap sections results in 2 outlines around the wrapped text (no fill, and no icon)
adding "wrap" to the plugins section of the dw2pdf configuration results in colour filled outlines around the wrapped text but no icons
Enabling
$this->showImageErrors = true;
in /lib/plugins/dw2pdf/mpdf/config.php
results in
mPDF error: IMAGE Error (http://dev.welfarecall.com/wiki2/lib/plugins/wrap/images/note/48/important.png): Could not find image file
But the image with this url will load in the browser. In the css style the image is shown as
background-image: url(/wiki2/lib/plugins/wrap/images/note/48/important.png);
Removing all images and wraps and exporting the default wiki:welcome results in this error
mPDF error: IMAGE Error (http://dev.welfarecall.com/wiki2/lib/images/interwiki/doku.gif): Could not find image file
and again the image will load in the browser and appears to be the very tiny dokuwiki logo used to identify dokuwiki links
Inspecting the page these images appear to be passed embedded into the css as base 64 encoded as a background image to the section/div applied to that text.
Removing all the [[doku>... ...]] links creates a PDF almost instantly so the delays appear to be related to the inability to "find" the images.
Creating my own transparent .png file and adding it to the wiki:welcome page works in the export so it doesn't appear to be a mpdf transparent image issue! I even wrapped this in a simple wrap box with no icon and it works fine. it appears to be icons in p0lugins that cause the issue.