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Improve tint luminance with weighting function (#3859)

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Co-authored-by: John Cupitt <jcupitt@gmail.com>
This commit is contained in:
Lovell Fuller
2023-11-19 13:19:34 +00:00
committed by GitHub
parent 139e4b9f65
commit 3f7313d031
17 changed files with 70 additions and 55 deletions
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10
lib/colour.js
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@@ -19,7 +19,7 @@ const colourspace = {
};
/**
* Tint the image using the provided chroma while preserving the image luminance.
* Tint the image using the provided colour.
* An alpha channel may be present and will be unchanged by the operation.
*
* @example
@@ -27,14 +27,12 @@ const colourspace = {
* .tint({ r: 255, g: 240, b: 16 })
* .toBuffer();
*
* @param {string|Object} rgb - parsed by the [color](https://www.npmjs.org/package/color) module to extract chroma values.
* @param {string|Object} tint - Parsed by the [color](https://www.npmjs.org/package/color) module.
* @returns {Sharp}
* @throws {Error} Invalid parameter
*/
function tint (rgb) {
const colour = color(rgb);
this.options.tintA = colour.a();
this.options.tintB = colour.b();
function tint (tint) {
this._setBackgroundColourOption('tint', tint);
return this;
}