Printer system that stores compressed font glyphs in data blocks

Details Printer system that stores compressed font glyphs in data blocks Printer system that stores compressed font glyphs in data blocks

1995-12-01

1996-11-19

Herndon, Heather R.

395115, 395167, G06K 1500

Patent

active

055771831

ABSTRACT:
Data processing apparatus provides pixel data representations of font glyphs, and includes a memory which stores font data in plural groups of entries. A first group of entries comprises a series of data blocks, each data block including data-compressed forms of plural glyphs. The plural glyphs in a data block exhibit a common attribute which suggests that the plural glyphs be decompressed together. A processor is responsive to a signal stream that includes character codes, to access from the memory a data block that includes a glyph corresponding to a received character code. The processor subjects all data compressed forms of glyphs from the data block to one of a plurality of decompression procedures. In this manner, all decompressed pixel data representations of glyphs in a data block become available for use by the processor as a result of the decompression action. Under certain circumstances, decompressed glyph font data is cached for subsequent use, after decompression.

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