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TrueDoc in Embedded Devices
Bitstream TrueDoc provides a compact, high-performance font rasterizer that is ideal for limited memory applications. The same compact data format is used for both embedded and downloaded fonts, so one engine provides both capabilities. Embedded fonts and downloaded font fragments can be combined dynamically.

TrueDoc can be fully implemented into an embedded system using only approximately 100K of memory. This includes support for color anti-aliasing, sub-pixel positioning, digital edge filtering plus special effects such as drop shadow, mirror, flip, and rotation. An optional path graphics module is also available.

Fonts are stored by TrueDoc in a Portable Font Resource (PFR) formatted file. The PFR files are only slightly bigger than a single 24 line monochrome bitmap of the same font. Because TrueDoc fonts are fully scaleable, they can supply all required character sizes at any resolution, which is a real plus if multiple output resolutions such as screen and printer must be considered. When memory is a primary concern, TrueDoc's built-in psuedo-bold and psuedo-italic capability can be used to reduce the number of fonts required to be stored in memory.

TrueDoc is fully double-byte enabled and works with all world languages, delivering an ideal solution for embedded Asian languages. A complete system including the TrueDoc core plus level 1 and level 2 GB Chinese can be implemented in under one megabyte of memory.

 


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