System and method for remote printing using incremental font subsetting

A computer-readable medium on which is stored a computer program for generating a spool file using incremental font subsetting on a server for a document comprising a plurality of pages, each of said plurality of pages comprising a plurality of calls, including calls comprising text information and an associated reference to a font comprising glyphs representing said text information, the computer program comprising instructions which, when executed by a computer, perform the steps of:

• (a) determining whether a call on a page of said document is a call comprising text information and an associated reference to a font;
• (b) if it is determined that said call is a call comprising text information and an associated reference to a font, determining whether the font referenced in said call is identified in a pre-existing list of fonts;
• (c) if it is determined that said font is not identified in said pre-existing list of fonts, determining whether said font has been previously copied to a spool file on a server;
• (d) if it is determined that said font has not been previously copied to said spool file, determining whether said font comprises more glyphs than a threshold number of glyphs;
• (e) if it is determined that said font does not comprise more glyphs than a threshold number of glyphs, copying said font to said spool file;
• (f) if it is determined that said font does not comprise more glyphs than said threshold number of glyphs, adding all of the glyphs referenced in said call to a first list for said font and determining whether said page is the first page in said document containing a call comprising text information and an associated reference to a font, referencing said font;
• (g) if it is determined that said page is not the first page containing a call comprising text information and an associated reference to a font referencing said font, adding all of the glyphs referenced in said call which have not been previously referenced to a second list for said font;
• (h) incrementing said call to the next call on said page and repeating from step (a).

A method for generating a spool file using incremental font subsetting on a server for a document comprising a plurality of pages, each of said plurality of pages comprising a plurality of calls, including calls comprising text information and an associated reference to a font comprising glyphs representing said text information, the method comprising the steps of:

• (a) determining whether a call on a page of said document is a call comprising text information and an associated reference to a font;
• (b) if it is determined that said call is a call comprising text information and an associated reference to a font, determining whether the font referenced in said call is identified in a pre-existing list of fonts;
• (c) if it is determined that said font is not identified in said pre-existing list of fonts, adding all of the glyphs referenced in said call to a first list for said font and determining whether said page is the first page in said document containing a call comprising text information and an associated reference to a font referencing said font;
• (d) if it is determined that said page is not the first page containing a call comprising text information and an associated reference to a font, referencing said font, adding all of the glyphs referenced in said call which have not been previously referenced to a second list for said font.

A method for generating a spool file using incremental font subsetting on a server for a document comprising a plurality of pages, each of said plurality of pages comprising a plurality of calls, including calls comprising text information and an associated reference to a font comprising glyphs representing said text information, the method comprising the steps of:

• (a) determining whether a call on a page of said document is a call comprising text information and an associated reference to a font;
• (b) if it is determined that said call is a call comprising text information and an associated reference to a font, determining whether the font referenced in said TextOut call is identified in a pre-existing list of fonts;
• (c) if it is determined that said font is not identified in said pre-existing list of fonts, determining whether said font has been previously copied to a spool file on a server;
• (d) if it is determined that said font has not been previously copied to said spool file, determining whether said font comprises more glyphs than a threshold number of glyphs;
• (e) if it is determined that said font does not comprise more glyphs than a threshold number of glyphs, copying said font to said spool file;
• (f) if it is determined that said font does not comprise more glyphs than said threshold number of glyphs, adding all of the glyphs referenced in said call to a first list for said font and determining whether said page is the first page in said document containing a call comprising text information and an associated reference to a font referencing said font;
• (g) if it is determined that said page is not the first page containing a call comprising text information and an associated reference to a font referencing said font, adding all of the glyphs referenced in said call which have not been previously referenced to a second list for said font;
• (h) incrementing said call to the next call on said page and repeating from step (a).

A computer system for generating a spool file on a server using incremental font subsetting, the computer system comprising:

• a processor;
• a memory coupled to the processor, the memory maintaining a document comprising a plurality of pages, each of said plurality of pages comprising a plurality of calls, including calls comprising text information and an associated reference to a font comprising glyphs representing said text information;
• a networked server comprising a storage unit;
• the networked server being operative to receive data transmitted from said processor and to write said data to a record in a spool file on said storage unit;
• the processor being operative to:
• (a) determine whether a call on a page of said document in said memory is a call comprising text information and an associated reference to a font;
• (b) if it is determined that said call is a call comprising text information and an associated reference to a font, said processor operative to determine whether the font referenced in said call is identified in a pre-existing list of fonts;
• (c) if it is determined that said font is not identified in said pre-existing list of fonts, said processor operative to determine whether said font has been previously copied to a spool file on a server;
• (d) if it is determined that said font has not been previously copied to said spool file, said processor operative to determine whether said font comprises more glyphs than a threshold number of glyphs;
• (e) if it is determined that said font does not comprise more glyphs than a threshold number of glyphs, said processor operative to transmit said font to said server;
• (f) if it is determined that said font does not comprise more glyphs than said threshold number of glyphs, said processor operative to add all of the glyphs referenced in said call to a first list for said font and to determine whether said page is the first page in said document containing a call comprising text information and an associated reference to a font referencing said font;
• (g) if it is determined that said page is not the first page containing a call comprising text information and an associated reference to a font referencing said font, said processor operative to add all of the glyphs referenced in said call which have not been previously referenced to a second list for said font;
• (h) increment said call to the next call on said page and repeat from step (a).