init (again)

shaders/other/colorlevels.glsl

@@ -0,0 +1,12 @@
+//!HOOK OUTPUT
+//!BIND HOOKED
+//!DESC signal range scaling
+vec4 color = HOOKED_texOff(vec2(0.0, 0.0));
+vec4 hook() {
+    const float REFBLACK = (  64. / 1023.);
+    const float REFWHITE = ( 940. / 1023.);
+
+    color.rgb *= REFWHITE - REFBLACK;
+    color.rgb += REFBLACK;
+    return color;
+}