| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for improving a transfer speed in transferring an image to an image display device through a network. SOLUTION: A hook processing module 400 hooks and preempts a specific drawing command issued by an application program 122, draws an image in an image data storage area 106b within a RAM 106 according to the acquired drawing command and stores first changed area information A1 showing showing the drawn area in the RAM 106. Drawing modules 124, 126 and 128 perform drawing in a VRAM 114 and store second changed area information A2 showing the drawn area in the RAM 106. A VNC server 130 transfers an image and stores the first changed area information A1 as transfer history information HA1. At the time of image transfer, an area obtained by adding the first and second changed areas or the second changed area itself becomes a transfer target. COPYRIGHT: (C)2006,JPO&NCIPI
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