Re: [ft-devel] gamma correction demo images

[Nikolaus Waxweiler]

> Yes, the only difference in blending is that subpixel mode does it 3
> times per pixel.

Okay, thanks :)

> The filter is color-balanced, but not normalized. Values above 0x100
> will have to be clamped and this non-linearity causes distortion and
> adds to color fringing. Stem darkening is the better way to increase
> contrast.

So I tried to find two values that sum to 0x100:

>>> def f(a,c):
...  return [a - c, a + c, 2 * a, a + c, a - c]
...
>>> [(a,c) for a in range(0x100) for c in range(0x100) if a > c and 
sum(f(a, c)) == 0x100]
[]

So, uh, what am I missing? I found some values that sum to 0xFC but I 
want 0x100 :(