[Open-graphics] Open exercise in developing test logic (video)

[tsuraan]

>
> 2. Output a real video frame
> 2.1. Just syncs with constant data (all white screen)
> 2.2. Ramp (left edge is black, right edge is white)
> 2.3. Other test patterns like a box with an X in it the size of the
> screen.


Would the X11 "blank screen" (the single-pixel checkerboard pattern it uses)
be useful?  I've always thought of it as a monitor test, but maybe useful
for a video card?

Also, a few months ago, a there was a lot of talk about gamma correction.
Would displaying colors (or greys) that are gamma-adjusted linear gradients
be useful?
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