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Cidfont F1 F2 F3 F4 F5 F6 Full Access

Registry-Ordering: Adobe-CNS1 Primary Use: Traditional Chinese as used in Taiwan, Hong Kong, and Macau.

Let’s look at a snippet of a PDF object dictionary that contains the full F1–F6 sequence.

15 0 obj
<<
  /Type /Font
  /Subtype /CIDFontType2
  /BaseFont /CIDFont+F1
  /CIDSystemInfo <<
    /Registry (Adobe)
    /Ordering (Identity)
    /Supplement 0
  >>
  /FontDescriptor 16 0 R
  /DW 1000
  /W [0 [500] 31 [600] 40 [700]]
>>
endobj

... (repeated for F2 through F6 with different /FontDescriptor references)
 cidfont f1 f2 f3 f4 f5 f6 full

Notice:

VDP systems (like XMPie or FusionPro) dynamically generate text fields. To ensure fast rendering, they create up to six cached CIDFont subsets. Each time a new character enters the data stream, it is allocated to one of the six slots.

Unlike traditional fonts (Type 1 or TrueType) that use a simple 1-byte encoding (maximum 256 characters), CID-keyed fonts support large character sets—often thousands of glyphs—required for CJK languages (Chinese, Japanese, Korean) as well as complex symbol sets. Adobe developed CIDFonts to bypass the 256-character limit. Notice: VDP systems (like XMPie or FusionPro) dynamically

A CIDFont is essentially a database of glyphs, each identified by a unique CID number. The mapping from a character code (like Unicode) to a CID is handled by a CMAP (Character Map).

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