基于ISO/IEC10646标准的藏文操作系统若干问题研究

长期以来尚未有完整的藏文操作系统,原因是藏文文字的特性要求特定的文字处理。本文基于ISOPIEC 10646 的藏文字符集标准,结合藏文正字法要求,详细分析了藏文操作系统实现中的关键问题: (1) 藏文字符集方案比较与藏文存储; (2) 藏文输入; (3) 藏文显现。藏文显现是公认的“瓶颈”问题。对此,本文提出基于音节划分、使用OpenType 字体及相应的文本引擎来解决藏文“叠加”字符的显现。此方案应用于Qt 库的实验及相关测试证明基于ISOPIEC 10646 标准的藏文操作系统实现是较合理的方案。

Study on Implementing Tibetan Operating System Based on ISO/IEC 10646

Since Tibetan text is not only spelled from le ft to right but also Tibetan consonants can be overlapped vertically, it's more di fficult to display a sting of Tibetan text correctly and legibly. No operating s ystem can fully support Tibetan at present. Based on Tibetan character set defin ed in ISO/IEC 10646 and Tibetan orthography, issues about implementing a Tibetan operating system are discussed. They are involved in character set, encoding sc heme, storing format, input and presentation of Tibetan text. It is considered a s a bottleneck to render Tibetan vertical stacks. To address this issue, a Tibet an text engine based on OpenType font technology is presented, which receives Ti betan syllables and partitions it into vertical stacks. The tests applying to Qt prove that it is rather feasible to implement a Tibetan operating system based on ISO/IEC 10646.