Monotype Imaging AC3 Font Compression OS Design Development (Windows Embedded CE 6.0)
1/6/2010
East Asian font files take up a large amount of memory. Font compression reduces the ROM and RAM impact of these files. Windows Embedded CE includes the Monotype Imaging AC3 Font Compression technology. AC3 fonts are TrueType fonts in a compressed format. The following list shows some of the benefits of the AC3 technology.
- AC3 technology works with any TrueType font.
- AC3 technology is lossless; no glyph hinting data is lost during compression or decompression.
- Calling the font does not decompress the whole font file but rather decompresses a limited range of characters.
You can include both compressed (files with extensions such as .ac3) and non-compressed (files with extensions such as .ttf and .ttc) font files in your OS design. If font compression is on, Windows Embedded CE will first look for the .ac3 file for the font and then use the non-compressed file if the .ac3 file is not found. If font compression is disabled, Windows Embedded CE will not use the .ac3 files.
Note
Prior to Windows Embedded CE 6.0, the company Monotype Imaging was named Agfa Monotype, and the Monotype Imaging AC3 Font Compression technology was referred to as Agfa AC3 Font Compression.
OS Design Information
The following table shows operating system design information for Monotype Imaging AC3 Font Compression.
| Element | Information |
|---|---|
Dependencies |
None |
Hardware considerations |
None |
Modules and Components
| Item | Module | Component |
|---|---|---|
Monotype Imaging AC3 Font Compression |
GWES |
Decompdrv |
Agfa AC3 Font Compression Implementation Considerations
| Sysgen variable | Description |
|---|---|
SYSGEN_AGFA_FONT |
When this variable is set, Monotype Imaging AC3 Font Compression is included in the run-time image. |
See Also
Concepts
Locale-specific OS Design Development