Many computer applications involve high quality graphic images. Perhaps the most familiar use of graphics is in video games. Other applications include artistic work, medical imaging, and animated films. A high quality image requires a large number of pixels to be displayed. Before an image is sent to a display screen, the color of each of these pixels has to be computed and stored in memory buffer. From there the information is sent to the screen at a rate of at least 30 times per second to keep the displayed image refreshed.
The task of computing pixel intensity and color can be done in software.
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