linear_to_srgb_fast

A faster linear_to_srgb for values in [0, 1]: a binary search over the same 64-segment table, inverted by linear interpolation, so there is no pow call at run time. The error is below about 0.003 in the encoded result. Inputs of 1 or more fall back to the exact curve, and the linear segment below 0.0031308 is exact.

#import "Math";
x := linear_to_srgb_fast(0.5);
assert(abs(x - linear_to_srgb(0.5)) < 0.003);

linear_to_srgb_fast :: (x: float) -> float

#import "Math";
x := linear_to_srgb_fast(0.5);
assert(abs(x - linear_to_srgb(0.5)) < 0.003);

linear_to_srgb_fast :: (c: Vector3) -> Vector3

linear_to_srgb_fast :: (c: Vector4) -> Vector4