METHOD FOR REDUCING SIZE AND INCREASING SPEED FOR FONT GENERATION OF INSTRUCTIONS

摘要

A method for compressing font instruction data. The method includes analyzing a set of pixel-per-em values and fractional pixel shifts contained in font instruction for each glyph in a font data set to construct a database of values. The pixel-per-em values and fractional pixel shifts are converted into operational codes and argument values and these values are compressed into a compressed data stream including a series of multiple-bit words representing font instruction specifications for each glyph in the font data. In addition, fixed environmental variable values are set for each glyph based on the font instruction data. When a glyph is to be rendered using the compressed font instruction, the compressed instruction is decompressed and only relevant multiple-bit word or words corresponding to font instruction specifications for the respective glyph are executed, but not any of the 16-bit words corresponding to font instruction for the fixed environmental values.