Use Fontlab to Generate an Opentype font

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Posted by: KTsee
         

Hi, I have a question when using Fontlab to generate an opentype font(*.ttf) :

 

I try to generate an opentype font , but always after I generate font, I can only get a TrueType font   . And before I generate it, I have tried the ligature feature in Fontlab and successfully compiled it and it works well in preview-window.

How can I generate the opentype font ? Is there some settings wrong ?

Can somebody help me, please ? Thank U very Much !!!

 

 

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Posted by: KTsee
         

it seems that I must add a digital signature to make the font icon right.

The font runs well when I use the volt to check its opentype featues.

But after I ship font out from volt and test my new font in InDesign, the opentype feature can not work.

So I wanna know if I don't add the digital signature,

can I still use the opentype feature(e.g. the ligature) in InDesign or WinWord, pls ?

 

Thanks a lot !!!!

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Posted by: Majid
         
Digital signature will help you make the icon look like you want but bear in mind that shape of icon has absolutely nothing to do with opentype features being available in the font, let alone working as expected.

If an opentype feature is not working in InDesign it definitely has to have other causes for the font to behave as such than the absence of digital signature or the shape of icon.

I would advise you not worry about the shape of icon at this stage, first identify the cause of problem, address it and once the font is working (my fonts with TrueType icon work fine in InDesign) then you can think about changing the icon.

It is also possible that when you generate/compile the font in Fontlab, the opentype tables are not being included in the font. Try testing the font immediately after compiling it in Volt.

-Majid

[ArchivePoster]

Posted by: brsma_de
         
You need to understand that opentype fonts come in two flavours: Postscript and TrueType. As far as I guess, the curves in your font are truetype curves and not postscript curves (beziers). Consequently, according to the OT specs, your font is generated with a TTF extension. The OTF extension is for PS flavoured opentype fonts.

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Posted by: Majid
         
There has been quite this confusion on this issue. The convention to name fonts as such is not recognized by system and is not system dependent, as such you can find fonts named otf or ttf without regard to whether it uses truetype or postscript curves.

One of the reasons for this confusion is that while ttf extension can be logically related to truetype, the otf cannot be likewise related to postscript (or type 1) fonts. That otf sounds like opentype font further confounds the issue.

To further confuse we have the icons with 'tt and 'o', which acutally signify only this that font with 'o' insignia or icon is a digitally signed font. But Windows OS uses adds to confusion here. Open the font folder and all the fonts with 'tt' extension are identified and classified as True Type fonts while the fonts with 'o' type extension are marked as Open Type font. It is interesting that this classification is not based on the fact whether or not a font contains opentype features/tables!

Thus the use of an O icon, if a font is not digitally signed, is just an issue of cosmetics. A font developer, who is not registered, too can use the O icon for a font which is not digitally signed, although the font would not bear digital signature.

Fontlab is clear on the issue. It shows that True Type as well as Open Type font can have ttf extension. And Open Type (Postscript) can have otf extension.

Anyhow, back to the issue of the thread, a font containing opentype tables but with TT encoding, if properly made, would work in InDesign and if it is not working it has nothing to do with the type of icon or the type of extension used.

-Majid

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