scripts reorganize

scripts/hypr-shaders/grey.frag

@@ -0,0 +1,18 @@
+#version 300 es
+precision mediump float;
+in vec2 v_texcoord;
+uniform sampler2D tex;
+out vec4 FragColor;
+
+
+// Values obtained from: http://en.wikipedia.org/wiki/Grayscale#Luma_coding_in_video_systems
+vec3 LumaFactors = vec3(0.299, 0.587, 0.114);
+
+void main() {
+  vec4 c = texture(tex, v_texcoord);
+
+  // Desaturate to luma only
+  float luma = dot(vec3(c.r, c.g, c.b), LumaFactors);
+
+  FragColor = vec4(luma, luma, luma, c.a);
+}