[orx-fx] Add Duotone, DuotoneGradient, LumaHalftone, Posterize, RgbToOkLab, OkLabToRgb

orx-fx/src/commonMain/kotlin/dither/LumaHalftone.kt

@@ -0,0 +1,53 @@
+package org.openrndr.extra.fx.dither
+
+import org.openrndr.draw.Filter
+import org.openrndr.draw.filterShaderFromCode
+import org.openrndr.extra.fx.fx_luma_halftone
+import org.openrndr.extra.parameters.BooleanParameter
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+
+
+@Description("Luma Halftone")
+class LumaHalftone: Filter(filterShaderFromCode(fx_luma_halftone, "luma-halftone")) {
+    @DoubleParameter("scale", 1.0, 30.0, precision = 4)
+    var scale: Double by parameters
+
+    @DoubleParameter("threshold", 0.0, 1.0, precision = 4)
+    var threshold: Double by parameters
+
+    @DoubleParameter("rotation", -180.0, 180.0)
+    var rotation: Double by parameters
+
+    @DoubleParameter("freq0", 1.0, 400.0)
+    var freq0: Double by parameters
+
+    @DoubleParameter("freq1", 1.0, 400.0)
+    var freq1: Double by parameters
+
+    @DoubleParameter("gain1", -2.0, 2.0)
+    var gain1: Double by parameters
+
+    @DoubleParameter("phase0", -1.0, 1.0)
+    var phase0: Double by parameters
+
+    @DoubleParameter("phase1", -1.0, 1.0)
+    var phase1: Double by parameters
+
+
+    @BooleanParameter("invert")
+    var invert: Boolean by parameters
+
+
+    init {
+        scale = 3.0
+        rotation = 0.0
+        threshold = 0.5
+        freq1 = 20.0
+        freq0 = 10.0
+        gain1 = 0.1
+        phase0 = 0.0
+        phase1 = 0.0
+        invert = true
+    }
+}