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    • 5. 发明授权
    • Apparatus and method for drawing character sequence using font data with any data structure
    • 使用任何数据结构的字体数据绘制字符序列的装置和方法
    • US06661416B2
    • 2003-12-09
    • US09745582
    • 2000-12-21
    • Masahiro MuikaichiKenji IzumiSatoshi Tsujimura
    • Masahiro MuikaichiKenji IzumiSatoshi Tsujimura
    • G06T1500
    • G09G5/24
    • A character sequence drawing apparatus which stores font data and font processing functions for executing processes for using the font data. The font processing functions are, for example a rasterizer initialization function, a glyph-by-glyph pattern obtaining function, a glyph-by-glyph font metrics information obtaining function, and a common font metrics information obtaining function. The character sequence drawing apparatus receives, from an application program (AP), a piece of font access information that includes addresses of font data and a group of types of font processing functions, assigns a font ID to the piece of font access information, stores the font ID with correspondence to the piece of font access information, and sends the font ID to the AP. After this, the AP can issue a request to execute a drawing-related process (e.g., obtaining a character sequence width, obtaining height of a font, or drawing a character sequence) to the character sequence drawing apparatus, specifying a font ID. After receiving a request from the AP, the character sequence drawing apparatus identifies addresses of font processing functions based on the received request and piece of font access information corresponding to the specified font ID, and executes the functions.
    • 一种字符序列绘制装置,其存储用于执行使用该字体数据的处理的字体数据和字体处理功能。 字体处理功能例如是光栅化器初始化功能,逐字形图案获取功能,字形字形量度信息获取功能,以及通用字体度量信息获取功能。 字符序列绘制装置从应用程序(AP)接收包括字体数据的地址和字体处理功能的一组类型的字体访问信息,将字体ID分配给字体访问信息,存储 与字体访问信息对应的字体ID,并将该字体ID发送到AP。 之后,AP可以向字符序列绘制装置发出指定字体ID的请求,以执行与图形相关的处理(例如,获得字符序列宽度,获得字体的高度或绘制字符序列)。 在从AP接收到请求之后,字符序列绘制装置基于接收的请求和与指定字体ID相对应的字体访问信息来识别字体处理功能的地址,并执行该功能。