Patent ID: 7478098
Filing Date: 2009-01-13
Classification: H04L,Y10S

Abstract:
1. A data transfer system comprising: (a) an application server computer comprising: a server-side cache memory for storing shape cache information in which is registered shape data used for drawing a predetermined shape; search/registration means, responsive to creation of graphics information by an application, for searching the server-side cache memory to determine whether or not shape data of the created graphics information is registered in the shape cache information, and registering the shape data in the shape cache information in the server-side cache memory if the shape data is not registered; and data transfer means for replacing, if the shape data is registered, the shape data of the graphics information with designation information specifying corresponding registered shape data registered in the shape cache information to generate graphics differential information, and transmitting the generated graphics differential information; and (b) a client computer comprising: a client-side cache memory for storing the shape cache information in which the shape data is registered; registration means, responsive to acquisition of the graphics differential information from the application server computer, for registering new shape data of the graphics differential information in the shape cache information in the client-side caches memory; and data restoration means for searching the shape cache information in the client-side cache memory based on the designation information of the graphics differential information, and replacing the designation information of the graphics differential information with registered shape data found by the search, to restore the graphics information, wherein: the search/registration means and the registration means assign a unique shape number to the shape data when registering the shape data; and the data transfer means sets, as the designation information, the unique shape number assigned to the registered shape data.