Only Subset(ted) fonts get a prefix - full embeds do not. Merging subsets is difficult but not impossible - Acrobat does this when you merge documents, for example.
And yes, we simply things in Acrobat/Reader for the average user. Leonard On 10/31/11 9:35 AM, "suzuki toshiya" <[email protected]> wrote: >The embedded fonts in PDF are expected to have the randomized prefix >(please check PDF spec). If without randomized prefix, it is difficult >to merge multiple PDFs with different subsets of same font (if a document >using only the digits of Courier, and another document using only the >Roman alphabets of Courier - to merge them, PDF interpreter should break >2 embedded fonts and merge 1 font? It's complex work!). >Also using randomized prefix makes it easy to create per-page subsetted >TrueType fonts. > >Adobe Reader "kindly" removes the randomized prefix and show unique >family names only, maybe for the users who are unfamiliar with the design >of PDF structure. > >Regards, >mpsuzuki > >cobra.yu wrote: >> Dears, >> >> When opening some PDF files with poppler_qt4viewer in qt4/demos, it >>shows some font names in View->Fonts with strange "Prefix"es. >> For example, viewing with Adobe Reader, the font name is >>"DINPro-Regular", but poppler-qt4 shows "ELONDC+DINPro-Regular". >> Sometimes, duplicate font names appear in the font list with >>different strange prefixes, like "VUQIMU+DFLiHeiStd-W5", >>"DDDFUE+DFLiHeiStd-W5", "KSKUOQ+DFLiHeiStd-W5" and so on. >> What does this mean? Tks a lot. >> >> Cobra >> _______________________________________________ >> poppler mailing list >> [email protected] >> http://lists.freedesktop.org/mailman/listinfo/poppler > >_______________________________________________ >poppler mailing list >[email protected] >http://lists.freedesktop.org/mailman/listinfo/poppler _______________________________________________ poppler mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/poppler
