feat: add color transformation function by matrix

color_effects/matrix_color.ts

@@ -0,0 +1,35 @@
+// Copyright 2023 mineejo. All rights reserved. MIT license.
+
+import { Rgb } from "../color/mod.ts";
+import { Color } from "../color.ts";
+
+// deno-fmt-ignore
+export type ColorTransformationMatrix = [
+  number, number, number,
+  number, number, number,
+  number, number, number
+];
+
+export function matrixColor(
+  color: Color,
+  matrix: ColorTransformationMatrix,
+): Color {
+  const [red, green, blue]: Rgb = color.components.map((component: number) =>
+    component / 255
+  ) as Rgb;
+
+  let index = 0;
+
+  return new Color(
+    false,
+    ...new Array(3).fill(undefined).map(() => {
+      const component: number =
+        (matrix[index] * red + matrix[index + 1] * green +
+          matrix[index + 2] * blue) *
+        255;
+
+      index += 3;
+      return component;
+    }) as Rgb,
+  );
+}

color_effects/mod.ts

@@ -2,6 +2,7 @@
 
 export { discolor } from "./discolor.ts";
 export { invertColor } from "./invert_color.ts";
+export { matrixColor } from "./matrix_color.ts";
 export { mixColors } from "./mix_colors.ts";
 export { subtractColors } from "./subtract_colors.ts";
 export { summarizeColors } from "./summarize_colors.ts";