Abstract: A drawing data processing method for arranging data concerning each of the plurality of vertices to generate a third list to be input in a drawing processor, the method include: selecting a first data generation process appropriate to the first and third data formats; selecting a second data generation process appropriate to the second and fourth data formats; computing an offset between vertices on the third list according to at least the third and fourth data formats; performing the first data generation process on the first data and writing the generated first data in a memory at intervals indicated by the offset; performing the second data generation process to generate the second data represented in the fourth data format for the plurality of vertices and writing the generated second data in the memory at the intervals indicated by the offset, wherein the method is performed by a processing unit.