cabruen@athena.mit.edu (Charles Alan Bruen) (11/24/90)
As a relative newcomer to the net, this may sound like a dumb question but I have not been able to find the answer. What is the difference to Adobe Type 1 postscript fonts and Type 3. Always, what is the difference in copy-protected and non-copy-protected. (besides the obvious answer). How does this affect their use. Thanks for your patience -Charles Bruen cabruen@athena.mit.edu
basil@thyme.jpl.nasa.gov (Basil Hashem) (06/09/91)
Excuse me if this has been asked before. (Probably). Could someone please
outline the differences between Adobe Type 1 and Type 3 Fonts? It would be
appreciated if the answer made specific reference to the Macintosh but anything
is fine. As far as I know, most Postscript(tm) compatible printers can down-
load Type 1 fonts and that Adobe Type Manager (ATM) supports Type 1 fonts only.
Someone mentioned to me that there may be differences in how the data is
stored (Data fork vs. Resource fork). I'm not certain how Type 3 fits into
all of this. Can someone please set me straight on all this?
Thanks.
--
Basil Hashem
basil@thyme.jpl.nasa.gov
Jet Propulsion Laboratory La Canada Flintridge, CA
"This is not a .signature file."FLEGLEI@YaleVM.YCC.Yale.Edu (06/10/91)
Type 3 is an unencrypted user reserved PostScript font specification that allows filling and shading (not allowed in Type 1) & some different stroking specifications than Type 1. Type 3 was Adobe's sop to non- registered type developers and individuals. Type 1 is encrypted & I think compressed in the same process allowing smaller and faster trans- mission & output. It also has some slightly different specs on numbers of BCP's, I think, than Type 3. All in all Type 1 is effectively the best PS standard across Macintosh.
rcd@ico.isc.com (Dick Dunn) (06/11/91)
FLEGLEI@YaleVM.YCC.Yale.Edu writes: > Type 3 is an unencrypted user reserved PostScript font specification... Type 3 can be encrypted or not, as you wish. The "eexec" operator (encryp- ted exec) is a separate matter. >...that allows filling and shading (not allowed in Type 1) & some different > stroking specifications than Type 1... Type 1 fonts are intended to produce an outline which can be filled. The operators available in Type 3 fonts are just the normal PostScript "red book" operators. >...Type 3 was Adobe's sop to non- > registered type developers and individuals... C'mon now. Type 3 gives you a way to create fonts using normal PostScript operators, without all the hair of font hints, special operators and rules, and limited error checking in Type 1. While I do think Adobe took too long to provide the info to let people create Type 1 fonts, there's still a use for Type 3. Main point is that it gives you access to the font cache. >...Type 1 is encrypted & I > think compressed in the same process allowing smaller and faster trans- > mission & output... While all the Type 1 fonts I've seen have been encrypted, I think that's more a matter of protection than a requirement, and it would be a bizarre requirement--eexec is really a separate concept from the font mechanism. (I'm being cautious only because I've not tried an unencrypted Type 1 font. I have created encrypted Type 3's, tho.) Type 1 fonts aren't really "compressed" in the usual sense of the word (where compression is applied uniformly after-the-fact), but the font mechanism provides a set of shorthand codes for operators, so the effect is that they're much more compact than if they were written in terms of normal "moveto...lineto" operators. -- Dick Dunn rcd@ico.isc.com -or- ico!rcd Boulder, CO (303)449-2870 ...Simpler is better.
erics@erics.infoserv.com (Eric S. Smith) (06/12/91)
basil@thyme.jpl.nasa.gov (Basil Hashem) writes: > > Excuse me if this has been asked before. (Probably). Could someone please > outline the differences between Adobe Type 1 and Type 3 Fonts? It would be > appreciated if the answer made specific reference to the Macintosh but anything > is fine. As far as I know, most Postscript(tm) compatible printers can down- > load Type 1 fonts and that Adobe Type Manager (ATM) supports Type 1 fonts only. > Someone mentioned to me that there may be differences in how the data is > stored (Data fork vs. Resource fork). I'm not certain how Type 3 fits into > all of this. Can someone please set me straight on all this? > My understanding (and it is admittedly small) of the difference is this: Type 3 fonts are pure Postscript. Type 1 fonts are an Adobe special form of Postscript, which contains "hints", used by ATM for on-screen scaling. ----------------------------------------------------------------------- Eric Smith "Read my lips: No nude Texans!" erics@infoserv.com -George Bush, clearing up a miscommunication