提出了基于BAG结构的轮廓提取算法，并在此基础上又提出了提取字符形状特征(改进方向码)的方法。
The algorithm to extract the outline based on the BAG structure was proposed. On the basis of these, the shape feature (the improved direction code) were obtained.
呈现特定的字符时，表示这个字符的形状称为图符。
When a particular character is rendered, the shape representing this character is called a glyph.
为系统插字符创建一个新的形状并获得它的所有权。
Creates a new shape for the system caret and gets ownership of the caret.
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