Dynamically Rendering in a Scrollable Area

Posted by James on Stack Overflow See other posts from Stack Overflow or by James
Published on 2010-04-28T23:08:04Z Indexed on 2010/04/30 12:57 UTC
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Filed under:

graphics

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scrolling

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gdi+

What is the generic algorithm or process that is commonly used to dynamically render portions of a scrolling area?

For example, in Google Maps, when the user scrolls past the bounds of the currently rendered area, a grey checkerboard pattern is displayed within the not-yet-rendered portions while the application loads and renders those areas.

I'm looking specifically for the approach, or the mathematics, related to filling a graphics area in chunks based on what has just come into view.

If possible, I'm looking for anything relevant to the GDI+ process of doing so.

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