Disclosed is a font pattern processor (GDP) including font pattern storing means (FPT1) for defining a font pattern and font pattern access parameter storing means (FDR) for storing parameters for making access to this font pattern storing means (FPT1). Address calculation is made on the basis of the font pattern access parameter and a pattern code supplied from outside to indicate a font pattern. The font pattern processor (GDP) can include pattern drawing attribute indicating means (FAR) for indicating the attributes of pattern drawing by the font pattern data thus read out. Thus, the present invention can process predeter­mined font data at a high speed inside it on the basis of the pattern code and can easily accomplish diversification of font patterns. Furthermore, the invention can improve freedom of pattern drawing on the basis of a predetermined original font pattern.