SERVER APPARATUS, SERVER CONTROL PROGRAM AND CLIENT APPARATUS

摘要

In a hardware process at an accelerator circuit (circuit board), difference-compressed drawing data h (H) obtained by writing transmittable color data (S) into unchanged pixels tile by tile in a drawing area (Q') of a change in the image in present drawing data (G') can be created at high speed as transfer data. In addition, a transmission detected tile "0" (So) where all the image pixels in one tile have been replaced with transmittable color data (S) is not transferred to the client apparatus. Only the drawing detected tile "1" with a change in the drawing is transmitted. In this way, only the tile divided parts with a change are extracted from the preceding drawing data (G), thereby minimizing the amount of transferred data.