Nope - we actually merge the subsets. The only time we "re-embed" is if you are doing a text touchup/edit.
Leonard On 10/31/11 10:23 AM, "suzuki toshiya" <[email protected]> wrote: >Leonard Rosenthol wrote: >> Only Subset(ted) fonts get a prefix - full embeds do not. > >I was not aware of that full embeds do not need the randomized prefix, >thank you for correction. > >> Merging subsets is difficult but not impossible - Acrobat does this when >> you merge documents, for example. > >Yes, theoretically it is possible... I was thinking that Acrobat >does something like re-subsetting & re-embedding of the font when >the source font of the subsetted/embedded fonts is available on >the system Acrobat is running on. Thank you for correction of >my misunderstanding, again. > >Regards, >mpsuzuki > >> 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
