[system] Add blend color manipulator #40258
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| * @param {number} [gamma=1.0] - Gamma correction factor. For gamma-correct blending, 2.2 is usual. | ||
| */ | ||
| export function blend(background, overlay, opacity, gamma = 1.0) { |
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I originally set the gamma correction factor to 2.2, but I had to set it back to 1.0 because that's how browsers do it and blending wouldn't match browser behavior otherwise.
It's just another case in a long serie of Everyone Does sRGB Wrong Because Everyone Else Does sRGB Wrong
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I have addressed the comments & added tests. |
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@mnajdova Is this one good for merging? |
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| describe('blend', () => { | ||
| it('works', () => { | ||
| expect(blend('rgb(90, 90, 90)', 'rgb(10, 100, 255)', 0.5)).to.equal('rgb(50, 95, 173)'); |
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Nice, it's pretty much what I get with:
background: color-mix(in srgb, rgb(90, 90, 90), rgb(10, 100, 255) 50%);It's not supported by https://mui.com/material-ui/getting-started/supported-platforms/#browser but browser support it pretty good today: https://caniuse.com/?search=color-mix.
| * @param {number} opacity - Opacity multiplier in the range 0 - 1 | ||
| * @param {number} [gamma=1.0] - Gamma correction factor. For gamma-correct blending, 2.2 is usual. | ||
| */ | ||
| export function blend(background, overlay, opacity, gamma = 1.0) { |
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Should we export this as
| export function blend(background, overlay, opacity, gamma = 1.0) { | |
| export function unstable_blend(background, overlay, opacity, gamma = 1.0) { |
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With #40958, assuming we can use color-mix, I'm not clear why we need to make this util part of the public API. cc @DiegoAndai
Add a blend function to
colorManipulator.js, which is used in mui/mui-x#10059.