| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程學系 === 84 === In recent years, Raster Graphics has been used extensively.
Raster Graphics mostly involves the storage, manipulation and
rendering of bitmaps. In a simple environment, such as MS-DOS,
we can use hardware or software technique to get a optiomal
performance in display speed. However, in the window systems,
GDI (Graphics Device Interface) must coordinate with other
process to share the resources, and user must use the routine
provided by the system. Thus, the display speed can not be
efficient. In this paper, by using the principle of bitmap, I
will provide a technique using the Off-Screen buffer to reduce
the display area and faster the display speed. I will apply
this technique to the three methods of displaying bitmap,
analyze the results, and demonstrate that this technique has
much effect on improving the display speed.
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