Patent ID: 8847971

Claim:
A graphic processing device comprising; a memory which stores data of a first graphic; and a processor which executes a process including generating data of a second graphic identified by shifting each of a plurality of first sides of the first graphic stored in the memory by a certain length in a direction toward an inside of the first graphic and by tracing, in a certain direction, the first sides after the shifting and intersection points between the first sides after the shifting, generating data of a third graphic by shifting each of a plurality of second sides of the second graphic to both sides of each of the second sides by the certain length and by linking end points of the second sides after the shifting using a circular arc which is centered on an end point of the second side before the shifting and which has a radius of the certain length, generating data of a fourth graphic by performing a logical addition operation relating to a graphic between the second graphic and the third graphic, and outputting the first, second, third, or fourth graphic to a display device.