CHARTS

source/OverlayShader.hx

@@ -0,0 +1,33 @@
+package;
+
+import flixel.system.FlxAssets.FlxShader;
+
+class OverlayShader extends FlxShader
+{
+	@:glFragmentSource('
+		#pragma header
+		uniform vec4 uBlendColor;
+
+		vec3 blendLighten(base:Vec3, blend:Vec3) : Vec3 {
+			return mix(
+				1.0 - 2.0 * (1.0 - base) * (1.0 - blend),
+				2.0 * base * blend,
+				step( base, vec3(0.5) )
+			);
+		}
+
+		vec4 blendLighten(vec4 base, vec4 blend, float opacity)
+		{
+			return (blendLighten(base, blend) * opacity + base * (1.0 - opacity));
+		}
+
+		void main()
+		{
+			vec4 base = texture2D(bitmap, openfl_TextureCoordv);
+			gl_FragColor = blendLighten(base, uBlendColor, uBlendColor.a);
+		}')
+	public function new()
+	{
+		super();
+	}
+}