Patent
1990-05-07
1994-09-13
Nguyen, Phu K.
G06F 1520
Patent
active
053476247
ABSTRACT:
A graphic display method and apparatus including a plurality of virtual device coordinate systems independent of a coordinate system of a physical screen in which a graphic image to be displayed is independently drawn in a virtual device space of the corresponding virtual device coordinate system so as to map a specified area of each virtual device space onto the virtual screen at a specified position, thereby displaying a specified area of a virtual memory in a physical screen. Furthermore, code data of characters and graphics and image data are written in a logical screen buffer as drawing elements to be located at arbitrary positions of the logical screen such that a unit, specifying an area which is located at an arbitrary position and which has an arbitrary size in the logical screen causes the combining and editing of character, graphic, and image data already written in the specified area of the logical screen and the generating, as a result, of new image data. The new image data is written as a drawing element of the virtual screen in the virtual screen buffer at a specified arbitrary position.
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Akaosugi Takashi
Kojima Tomihiko
Nakamura Shouji
Shirahama Ritsuo
Takahashi Tooru
Hitachi , Ltd.
Nguyen Phu K.
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