Thread View: adobe.typography
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Started by stevend
Fri, 16 Nov 2007 14:50
Why is an opentype converted to a type1 in illustrator
Author: stevend
Date: Fri, 16 Nov 2007 14:50
Date: Fri, 16 Nov 2007 14:50
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Hi, When i export in AICS2 to a pdf then the opentype (type1 flavours) font is converted (or is it just presented as...)to a type1 font. I saw pdf's that contained opentype fonts (opentype icon). How comes? thx, Steven
Re: Why is an opentype converted to a type1 in illustrator
Author: Aandi_Inston
Date: Fri, 16 Nov 2007 15:06
Date: Fri, 16 Nov 2007 15:06
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OpenType fonts in a PDF is a very new feature (PDF 1.6/Acrobat 7). So software must be able to convert to other formats (type 1, TrueType, or CID) to support older PDF versions. Not all PDF generators will bother to NOT convert when they already have conversion code that works. Aandi Inston
Re: Why is an opentype converted to a type1 in illustrator
Author: Thomas_Phinney
Date: Fri, 16 Nov 2007 20:49
Date: Fri, 16 Nov 2007 20:49
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In some senses, it's the other way around: Type 1 is stored more like OpenType in PDF. PDF uses CFF (Compact Font Format) with Type 2 charstrings as a lossless compression for Type 1 fonts. When OpenType was created, Adobe adopted the then-new CFF approach for handling Type 1 outlines (entire fonts really) within OpenType. The other OpenType tables are in addition to the CFF portion of the font. So in PDF, when Acrobat reports fonts as being "Type 1," they are actually CFF - just like that portion of OpenType CFF fonts. More recently, PDF has added the capability to store additional OpenType layout tables as well. However, this facility has been little-used to date, AFAIK. Cheers, T
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