| 摘要 |
PROBLEM TO BE SOLVED: To guarantee the propriety of downloaded font data. SOLUTION: When data maps by tables are generated for the downloaded font, a data check is performed to improve the safety of the data. The font data which are downloaded from a transfer source are registered in a table for rough classifications (S1). The positions of the respective tables are grasped from the header (S2) and while reading the respective tables, the data maps are formed in character units (S3). At this time, an offset, length or data size and a sum value are checked (S4). If an error is found, an error process is performed (S5). |
