I’m using the Boisik font/package, which is not available as Type 1 and so (unless I’ve missed something) is only able to produce bitmapped fonts in the pdf output. By default, the resolution of these is fairly low.
Using a latex → dvips → ps2pdf workflow, I can at least make sure the generated bitmaps are high resolution, by invoking dvips with an option like dvips -D 2400 (as suggested in the Boisik documentation).
Is there any way to do this while using pdflatex?