painbrush

Index: package/src/color/utils.js
===================================================================
--- package/src/color/utils.js
+++ package/src/color/utils.js
@@ -0,0 +1,35 @@
+export const COLOR_ALPHA = [-1, -1, -1];
+export const COLOR_WHITE = [255, 255, 255];
+export const COLOR_BLACK = [0, 0, 0];
+/**
+ * Alphas are a cursed implementation detail that gets treated differently at blending, rn its just -1,-1,-1 but maybe in the future this can be loaded with alpha depth? or not. lol that sounds cursed.
+ */
+export const isAlphaColor = (color) => {
+    return color[0] === -1;
+};
+export const isColorMatch = (color1, color2) => {
+    return (color1[0] === color2[0] &&
+        color1[1] === color2[1] &&
+        color1[2] === color2[2]);
+};
+/**
+ * Layers use this to mix two colors together. this is where the alpha magic happens and where blend modes can go
+ */
+export const blendColor = (top, bottom) => {
+    if (top == null) {
+        return bottom;
+    }
+    if (isAlphaColor(top)) {
+        return bottom;
+    }
+    return top;
+};
+export const makeRandomColor = (r) => {
+    const next = (seed) => {
+        seed = Math.sin(seed) * 10000;
+        return seed - ~~seed;
+    };
+    const g = next(r);
+    const b = next(g);
+    return [r, g, b].map((c) => c * 255);
+};