Add LumaMap, LumaThreshold, BlockRepeat, alpha dithered ADither to orx-fx

orx-fx/src/main/kotlin/distort/BlockRepeat.kt

@@ -0,0 +1,44 @@
+package org.openrndr.extra.fx.distort
+
+import org.openrndr.draw.Filter
+import org.openrndr.draw.Shader
+import org.openrndr.extra.fx.filterFragmentCode
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+
+@Description("Horizontal wave")
+class BlockRepeat : Filter(Shader.createFromCode(filterVertexCode, filterFragmentCode("distort/block-repeat.frag"))) {
+    @DoubleParameter("block width", 0.0, 1.0, order = 0)
+    var blockWidth: Double by parameters
+
+    @DoubleParameter("block height", 0.0, 1.0, order = 1)
+    var blockHeight: Double by parameters
+
+    @DoubleParameter("block x-offset", -0.5, 0.5, order = 2)
+    var blockOffsetX: Double by parameters
+
+    @DoubleParameter("block y-offset", -0.5, 0.5, order = 3)
+    var blockOffsetY: Double by parameters
+
+    /**
+     * Source scale, 0.0 is a 1:1 mapping, 1.0 fits entire source image in block
+     */
+    @DoubleParameter("source scale", 0.0, 1.0, order = 4)
+    var sourceScale: Double by parameters
+
+    @DoubleParameter("source x-offset", -0.5, 0.5, order = 5)
+    var sourceOffsetX: Double by parameters
+
+    @DoubleParameter("source y-offset", -.5, .5, order = 6)
+    var sourceOffsetY: Double by parameters
+
+    init {
+        blockWidth = 0.25
+        blockHeight = 0.25
+        blockOffsetX = 0.0
+        blockOffsetY = 0.0
+        sourceOffsetX = 0.0
+        sourceOffsetY = 0.0
+        sourceScale = 0.0
+    }
+}