refactor: make the whole thing more generic

modules/home-manager/desktops/hyprland/hypr/shaders/solarized.frag

@@ -0,0 +1,41 @@
+// -*- mode:c -*-
+precision lowp float;
+varying vec2 v_texcoord;
+uniform sampler2D tex;
+
+float distanceSquared(vec3 pixColor, vec3 solarizedColor) {
+	vec3 distanceVector = pixColor - solarizedColor;
+	return dot(distanceVector, distanceVector);
+}
+
+void main() {
+	vec3 solarized[16];
+	solarized[0]  = vec3(0.,0.169,0.212);
+	solarized[1]  = vec3(0.027,0.212,0.259);
+	solarized[2]  = vec3(0.345,0.431,0.459);
+	solarized[3]  = vec3(0.396,0.482,0.514);
+	solarized[4]  = vec3(0.514,0.58,0.588);
+	solarized[5]  = vec3(0.576,0.631,0.631);
+	solarized[6]  = vec3(0.933,0.91,0.835);
+	solarized[7]  = vec3(0.992,0.965,0.89);
+	solarized[8]  = vec3(0.71,0.537,0.);
+	solarized[9]  = vec3(0.796,0.294,0.086);
+	solarized[10] = vec3(0.863,0.196,0.184);
+	solarized[11] = vec3(0.827,0.212,0.51);
+	solarized[12] = vec3(0.424,0.443,0.769);
+	solarized[13] = vec3(0.149,0.545,0.824);
+	solarized[14] = vec3(0.165,0.631,0.596);
+	solarized[15] = vec3(0.522,0.6,0.);
+
+	vec3 pixColor = vec3(texture2D(tex, v_texcoord));
+	int closest = 0;
+	float closestDistanceSquared = distanceSquared(pixColor, solarized[0]);
+	for (int i = 1; i < 15; i++) {
+		float newDistanceSquared = distanceSquared(pixColor, solarized[i]);
+		if (newDistanceSquared < closestDistanceSquared) {
+			closest = i;
+			closestDistanceSquared = newDistanceSquared;
+		}
+	}
+	gl_FragColor = vec4(solarized[closest], 1.);
+}