Linear ProPhoto
The Linear ProPhoto color space is registered in Color by default
Properties
Name: prophoto-rgb-linear
White Point: D50 / 2˚
Coordinates:
| Name | Range* |
|---|---|
r | [0, 1] |
g | [0, 1] |
b | [0, 1] |
* Range denotes in gamut colors, but the color space supports an extended range beyond the gamut.
Figure 1. CIE 1931 xy Chromaticity – ProPhoto RGB Chromaticities
The Linear ProPhoto space is the same as ProPhoto except that the transfer function is linear-light (there is no gamma-encoding).
Channel Aliases
| Channels | Aliases |
|---|---|
r | red |
g | green |
b | blue |
Input/Output
Linear ProPhoto is not supported via the CSS spec and the parser input and string output only supports the color() function format using the custom name --prophoto-rgb-linear:
color(--prophoto-rgb-linear r g b / a) // Color function
When manually creating a color via raw data or specifying a color space as a parameter in a function, the color space name is always used:
Color("prophoto-rgb-linear", [0, 0, 0], 1)
The string representation of the color object and the default string output will be in the color(--prophoto-rgb-linear r g b / a) form.
>>> Color("prophoto-rgb-linear", [0.52928, 0.09837, 0.01688])
color(--prophoto-rgb-linear 0.52928 0.09837 0.01688 / 1)
>>> Color("prophoto-rgb-linear", [0.6535, 0.42702, 0.06115]).to_string()
'color(--prophoto-rgb-linear 0.6535 0.42702 0.06115)'
Registering
from coloraide import Color as Base
from coloraide.spaces.prophoto_rgb_linear import ProPhotoRGBLinear
class Color(Base): ...
Color.register(ProPhotoRGBLinear())