Module gamma 

Gamma correction functions and lookup tables.

Port of agg_gamma_functions.h and agg_gamma_lut.h — various gamma correction strategies used throughout AGG for anti-aliasing quality.

Structs

GammaLinear

Linear ramp gamma: 0 below start, 1 above end, linear between. Port of C++ gamma_linear.

GammaLut

Gamma correction using pre-computed lookup tables. Port of C++ gamma_lut<LoResT, HiResT, GammaShift, HiResShift>.

GammaMultiply

Multiplicative gamma: min(x * multiplier, 1.0). Port of C++ gamma_multiply.

GammaNone

No gamma correction — returns input unchanged. Port of C++ gamma_none.

GammaPower

Power-law gamma correction: x^gamma. Port of C++ gamma_power.

GammaSpline

Spline-based gamma correction curve.

GammaThreshold

Threshold gamma: returns 0 if x < threshold, 1 otherwise. Port of C++ gamma_threshold.

Traits

GammaFunction

Trait for gamma correction functions. Port of C++ gamma function objects (operator() overload).

Functions

linear_to_srgb

Convert linear value (0..1) to sRGB.

srgb_to_linear

Convert sRGB value (0..1) to linear.