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Copy pathmatrix.ts
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94 lines (84 loc) · 2.96 KB
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import {clamp, multiplyMatrices} from '../../utils/math';
import type {matrix5x1, matrix5x5} from '../../utils/math';
import type {Theme} from '../../definitions';
export function createFilterMatrix(config: Theme): matrix5x5 {
let m: matrix5x5 = Matrix.identity();
if (config.sepia !== 0) {
m = multiplyMatrices(m, Matrix.sepia(config.sepia / 100));
}
if (config.grayscale !== 0) {
m = multiplyMatrices(m, Matrix.grayscale(config.grayscale / 100));
}
if (config.contrast !== 100) {
m = multiplyMatrices(m, Matrix.contrast(config.contrast / 100));
}
if (config.brightness !== 100) {
m = multiplyMatrices(m, Matrix.brightness(config.brightness / 100));
}
if (config.mode === 1) {
m = multiplyMatrices(m, Matrix.invertNHue());
}
return m;
}
export function applyColorMatrix([r, g, b]: [number, number, number], matrix: matrix5x5): [number, number, number] {
const rgb: matrix5x1 = [[r / 255], [g / 255], [b / 255], [1], [1]];
const result = multiplyMatrices<matrix5x1>(matrix, rgb);
return [0, 1, 2].map((i) => clamp(Math.round(result[i][0] * 255), 0, 255)) as [number, number, number];
}
export const Matrix = {
identity(): matrix5x5 {
return [
[1, 0, 0, 0, 0],
[0, 1, 0, 0, 0],
[0, 0, 1, 0, 0],
[0, 0, 0, 1, 0],
[0, 0, 0, 0, 1],
];
},
invertNHue(): matrix5x5 {
return [
[0.333, -0.667, -0.667, 0, 1],
[-0.667, 0.333, -0.667, 0, 1],
[-0.667, -0.667, 0.333, 0, 1],
[0, 0, 0, 1, 0],
[0, 0, 0, 0, 1],
];
},
brightness(v: number): matrix5x5 {
return [
[v, 0, 0, 0, 0],
[0, v, 0, 0, 0],
[0, 0, v, 0, 0],
[0, 0, 0, 1, 0],
[0, 0, 0, 0, 1],
];
},
contrast(v: number): matrix5x5 {
const t = (1 - v) / 2;
return [
[v, 0, 0, 0, t],
[0, v, 0, 0, t],
[0, 0, v, 0, t],
[0, 0, 0, 1, 0],
[0, 0, 0, 0, 1],
];
},
sepia(v: number): matrix5x5 {
return [
[(0.393 + 0.607 * (1 - v)), (0.769 - 0.769 * (1 - v)), (0.189 - 0.189 * (1 - v)), 0, 0],
[(0.349 - 0.349 * (1 - v)), (0.686 + 0.314 * (1 - v)), (0.168 - 0.168 * (1 - v)), 0, 0],
[(0.272 - 0.272 * (1 - v)), (0.534 - 0.534 * (1 - v)), (0.131 + 0.869 * (1 - v)), 0, 0],
[0, 0, 0, 1, 0],
[0, 0, 0, 0, 1],
];
},
grayscale(v: number): matrix5x5 {
return [
[(0.2126 + 0.7874 * (1 - v)), (0.7152 - 0.7152 * (1 - v)), (0.0722 - 0.0722 * (1 - v)), 0, 0],
[(0.2126 - 0.2126 * (1 - v)), (0.7152 + 0.2848 * (1 - v)), (0.0722 - 0.0722 * (1 - v)), 0, 0],
[(0.2126 - 0.2126 * (1 - v)), (0.7152 - 0.7152 * (1 - v)), (0.0722 + 0.9278 * (1 - v)), 0, 0],
[0, 0, 0, 1, 0],
[0, 0, 0, 0, 1],
];
},
};