METHOD AND DEVICE FOR MULTI-WINDOW DISPLAYING AND DRAWING
PURPOSE:To speed up display operation by discriminating whether each of small rectangular areas belonging to a clip window needs to be saved according to the contents of a control memory, substituting a high-order address generated by a linear interpolating means with a page address of the control m...
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| creator | TOMOTA MINORU UEDA TOMOAKI IKEDA SHIGETSUGU |
| description | PURPOSE:To speed up display operation by discriminating whether each of small rectangular areas belonging to a clip window needs to be saved according to the contents of a control memory, substituting a high-order address generated by a linear interpolating means with a page address of the control memory, and carrying out a drawing process for a stand-by memory. CONSTITUTION:All small rectangular areas of a window W1 which are masked with other windows W2 and W3 are saved in a main storage as to the relation between the masked areas and small rectangular areas. For small rectangular areas which need not be saved, the linear interpolating means draws an image on a display frame memory and an image including areas to be hidden which need not be saved is drawn on the stand-by memory by substituting high-order addresses among addresses generated by the linear interpolating means with page addresses of the control memory. Consequently, the drawing operation is performed fast. |
| format | Patent |
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CONSTITUTION:All small rectangular areas of a window W1 which are masked with other windows W2 and W3 are saved in a main storage as to the relation between the masked areas and small rectangular areas. For small rectangular areas which need not be saved, the linear interpolating means draws an image on a display frame memory and an image including areas to be hidden which need not be saved is drawn on the stand-by memory by substituting high-order addresses among addresses generated by the linear interpolating means with page addresses of the control memory. 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CONSTITUTION:All small rectangular areas of a window W1 which are masked with other windows W2 and W3 are saved in a main storage as to the relation between the masked areas and small rectangular areas. For small rectangular areas which need not be saved, the linear interpolating means draws an image on a display frame memory and an image including areas to be hidden which need not be saved is drawn on the stand-by memory by substituting high-order addresses among addresses generated by the linear interpolating means with page addresses of the control memory. 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CONSTITUTION:All small rectangular areas of a window W1 which are masked with other windows W2 and W3 are saved in a main storage as to the relation between the masked areas and small rectangular areas. For small rectangular areas which need not be saved, the linear interpolating means draws an image on a display frame memory and an image including areas to be hidden which need not be saved is drawn on the stand-by memory by substituting high-order addresses among addresses generated by the linear interpolating means with page addresses of the control memory. Consequently, the drawing operation is performed fast.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CALCULATING COMPUTING COUNTING CRYPTOGRAPHY DISPLAY EDUCATION ELECTRIC DIGITAL DATA PROCESSING PHYSICS SEALS |
| title | METHOD AND DEVICE FOR MULTI-WINDOW DISPLAYING AND DRAWING |
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