There are several ways to change the output to include a company or product logo image on the cover page of the PDF output file.
If you are using the bookmap/bkinfo specialization to produce a PDF book, you can place an image on the cover page by including an image in the title tag like this:
<title> <ph>First title phrase</ph> <image href="xxx.jpg" placement="break" /> <ph>Another title phrase</ph> </title>
It is also possible to modify or override the FO processing of the Idiom plugin. The way to do this is described in the file ./demo/fo/Customization/README.txt. To add an image to the cover page you can override cfg/fo/layout-masters.xsl by including these XML statements:
<fo:simple-page-master ...> <fo:region-body ... background-image="artwork:/foo.png" .../> </fo:simple-page-master>
The image can also be included by overriding front-matter.xsl by adding an XSL statement like this:
<fo:external-graphic src="/path/to/images/my_logo_file.pdf"/>