Analysis And Implementation Of The Interpreter. Postscript

The appearance of computer brings traditional printing industry into a new era of light and electronics. One of page description languages--PostScript is a new technology in area of electronic publishing in recent years. After serveral years , it has become the de facto standard of pre-publishing industry. Baseing on the design and implementation of a practical appliction system-- PostScript Interuptor, this article introduces and discusses most content related to this system from the view point of engineering. This thesis include:1.PostScript Language In this part , the rules of grammar, data types, semantics of operator and program execution enviroment etc. are introduced.2 Divition of functional sub-systems The system is divided as followings: grammar analysis sub-system,execution sub-system, VMM management sub-sytem, dictionary arrangement sub-sytem, font manipulation sub-sytem, color rendering sub-system and page output sub-system.. The functions of each sub-system, important data structures and algorithms are introduced in respective chapters.3 Discussion on some key technologies The details of discussion distributes in some related chapters and sections. The key technologies include memory arrangement technology, color conversion technology, font rendering technology and halftone screen technology and multi-segment output technology.