[pdftex] Reducing the number of font descriptors (was: Font subsetting with PDFs from InDesign?)

[Martin Schröder]

2008/7/11 Thanh Han The <hanthethanh at gmail.com>:
> On Fri, Jul 11, 2008 at 2:22 PM, Martin Schröder <martin at oneiros.de> wrote:
>> And the conclusion was: When including PDFs you always get a new font
>> descriptor for every font in the PDFs.
>
> FWIW: it's the way pdftex does pdf inclusion since the very beginning.

And everybody else (pdftk, Frame) does the same, it seems.
How hard would it be to change that, i.e. to merge fonts? Or are there
tools that already do this?

Best
   Martin