> divide it into 10 equally, or nearly equally wide vertical stripes. > > 1) For the stripe on the far left you could repeat each pixel 3 times. > 2) For the next two stripe repeat each 2 times. > 3) Then stripes four through seven are just a normal one:one mapping. > 4) The next two stripes would be the same as (2). > 5) The final stripe would be the same as (1) > > In other words the pattern for repeating pixels would be... > [3,2,2,1,1,1,1,2,2,3] > Dont forget that the vertical also needs to be scaled so your routine gets to be quite a bit more complicated. Not sure if some kind of a lookup table might do the trick. Divide the screen into zones and assign each zone a pair of strech values. You would need to limit the number of pixels per zone to keep it from becoming visible as a pattern.
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