Fontlab TransType Pro 3.0.2 Manuel d'utilisateur télécharger pdf (Page 39)

Conversion Process

Symbol Encoding

Symbol encoding is usually used to map symbolic or pictorial characters to

the 0-255 code space. No reencoding is necessary when you convert such

fonts to Macintosh format, so TransType will simply copy the characters

and you will use the same codes you used on the PC to access the

characters.

Unicode Mapping

In the case of Unicode mapping in the source font all we need to do is to

convert this encoding according to the Macintosh requirements. The

problem is that on the Macintosh we can use only codes in the 0-255 range

to access characters. This rule is not true in MacOS X, but we will use the

older requirements to let you build Macintosh fonts that will work on all

Macintosh systems. So we need to carefully use this space.

Every language used on the Macintosh has a codepage mapping table that

determines how characters are mapped to the 0-255 code space. When we

know which characters are in the source font (with the help of Unicode

indexing) and select a Macintosh codepage we can easily build a correctly

mapped Macintosh TrueType font.

We’ll describe below all the operations that you might need to perform to

make a correctly encoded Macintosh TrueType font.

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Fontlab TransType Pro 3.0.2 Manuel d'utilisateur Page 39