Add color correction to images (Because Steam doesn't know how to draw an image with the right colors)

[Piripe]

When you draw an image, Steam doesn't draw the same color with image() and fill().
I can't patch Steam so, I think Oxygen can patch images with color correction (Or color matrix).

I passed 2 days to search for a function to patch colors but can't find it.
Currently I found a method to patch most of the dark images : Add 1 to all colors (Example : #050505 become #060606)

So this issue is also a request for a genius that know how to patch images for Steam.