I figured-out the workaround for the problem with hiding text based on
OpenType font with Acrobat 8+,
the exact non-unicode encoding - this solved problem and Acrobat Reader 8 on
Windows/Linux and 9 on Windows are all displaying the text normally:
BaseFont bf = BaseFont.createFont("GFSDidot.otf", "Cp1251", true);
Hope this will help.
WBR,
Dmitri
Ulrich Telle wrote:
>
> I created a PDF file using a non-CID CFF OpenType font (namely
> GFSDidot.otf) with font subsetting enabled. The PDF is created without
> errors and it is displayed correctly when using Adobe Reader 7.x. But
> when using Adobe Reader 8.1 text based on the OpenType subset font is
> not displayed anymore, although Adobe Reader does not show an error
> message. Interestingly the characters seem to be there somehow since it
> is possible to mark the blank area where the text should be displayed
> and to copy the text to an editor. But the text is not rendered neither
> on screen nor when printed.
>
> If subsetting is turned off for the OpenType font and the complete font
> is embedded, then Adobe Reader 8.1 renders the text correctly on screen.
>
> Has someone an idea what's causing this behaviour? What has to be done
> that OpenType font subsets are handled correctly by Adobe Reader 8.1? Is
> information missing in the generated CFF font subset? Or is additional
> information needed in any PDF dictionary?
>
> Regards,
>
> Ulrich
>
>
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