[pdftex] PNG transparency problem

Hartmut Henkel hartmut_henkel at gmx.de
Sun Jul 24 11:42:32 CEST 2005

On Sun, 24 Jul 2005, Geoff Russell wrote:

> The following plain TeX code includes the attached PNG graphic
> containing transparency. But the transparency is being lost somewhere.

PNG transparency (alpha channel) is supported from pdftex-1.30.0 on
(coming soon; available test/rc versions do this already). Needs PDF-1.4
(or higher) output mode setting (1.4 is default anyway). It seems that
xpdf-3.00 doesn't show alpha, but Acrobat 7.0 does.

Regards, Hartmut

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