Zitat von Skylark
PGFs are bitmap fonts, and are scaled on-the-fly by the PSP (using the texture hardware, I suspect). So, once a TTF vector font is rendered into a PGF using ttf2pgf (that's what the FreeType library is used for), there is no way of rescaling it without impacting readability in a really bad way (scaling font bitmaps twice will introduce serious blur to the outline edges).
The amount of work to make an utility like this would be unjustifiably high. I suggest that everyone names the TTF font they converted into PGF so that we will know how to regenerate it.