HP 5961-0509 manual Final Font Selection, Symbol Set Mapping Table

TrueType example: If a symbol set based on Unicode numbers requires one or more characters from the standard ASCII collection and some of the characters from the Latin 5 collection, then bits 31, 28 and 0 are set to one (refer to Appendix D in the PCL 5 Comparison Guide for information regarding the various symbol collections).

As stated above, to determine which unbound scalable fonts contain the symbols for the specific symbol set, the printer must identify those unbound fonts that contain the symbol collections of the requested symbol set. To do this, the printer accesses the Character Requirements number for the requested symbol set. If, for example, the Roman-8 symbol set was requested, the printer would access the Character Requirements number from the Roman-8 symbol set information in the printer. This number is then compared with the Character Complement number of each unbound font in the printer. If any matches are found, those unbound fonts are included in the list of potential fonts for selection.

Final Font Selection

After the process above is complete, the printer contains a list of all fonts (bitmap, bound, and unbound) which support the requested symbol set. (If no fonts are found for the specified symbol set, Roman-8 is used. If more than one font remains, the printer continues comparing font selection characteristics, eliminating fonts, until only one remains. Whenever only one font remains, it is selected for printing.

Symbol Set Mapping Table

The printer receives character codes in the range 0-255 which, depending on the selected symbol set, identify the symbols to print or control codes to execute.

There are hundreds of symbols available in unbound fonts in

HP LaserJet printers, more than can be identified by the character code range (0 - 255). A list of these symbols is provided in the symbol indexes, such as the Master Symbol List (MSL) and the Unicode list In Appendix D of the PCL 5 Comparison Guide). Each symbol in the list is identified by a unique MSL or Unicode number. Symbols in unbound fonts are identified by this number.

EN Unbound Scalable Fonts 9-11