SCROLL METHOD FOR DRAWING PROCESSING

PROBLEM TO BE SOLVED: To provide a drawing scroll method which has no operational stress by minimizing the processing to expand the vector data into a drawing memory and updating fast this memory in every frame by means of the raster data already expanded into the drawing memory in regard to the scr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HARAGUCHI MASASHI, FUKADA HAJIME, OGATA TERUO
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a drawing scroll method which has no operational stress by minimizing the processing to expand the vector data into a drawing memory and updating fast this memory in every frame by means of the raster data already expanded into the drawing memory in regard to the scroll processing of a drawing processing system consisting of the vector data. SOLUTION: When scroll is requested by an input device against the initial display state, the rectangular areas overlapping each other before and after the raster data stored in a drawing memory 24 are scrolled are copied. Thus the vector data are edited and expanded in a raster into a blank area of the memory 24. As a result, the expansion of raster data is completed to the entire area of the memory 24 after a single frame is scrolled. Then a drawing is displayed after the scroll of a single frame through the display processing of the memory 24.