In fact, the PNG is converted to JPEG image before to be included in the PDF file. But the conversion process doesn't support transparency and sets a black background. I think that is a limitation in the JPEG writer but someone have perhaps an idea to fix it.

Olivier ;-)

2015-01-11 21:11 GMT+01:00 Torsten Bergmann <astares@gmx.de>:

> JPEG supports is degrading. Less and less good support.
>
> Le 11/1/15 18:04, Torsten Bergmann a ��crit :
> >>> I improved Artefact this morning and added the support for PNG files. It's now possible to use PDFPngElement to include a PNG (untransparent) in a PDF file produced by Artefact.
> > Nice, what is the reason only untransparent PNGs work?

Thanks - but that was not my question. PNG graphics format can - but must not
include transparency. When I understand the mail correct only non-transparent
PNG images are supported with the new addition.

That's why I ask about transparent PNG.

Bye
T.