Unfortunately the talks at TUG were not recorded this year, but you can read the preprint (http://tug.org/tug2019/preprints/rokicki-pdfbitmap.pdf http://tug.org

Unfortunately the talks at TUG were not recorded this year, but you can read the preprint (http://tug.org/tug2019/preprints/rokicki-pdfbitmap.pdf http://tug.org/tug2019/preprints/rokicki-pdfbitmap.pdf) which will probably be published in the next issue of TUGboat.