Add ZoomBlur, EdgesWork and Sepia filters

orx-fx/src/main/kotlin/edges/EdgesWork.kt

@@ -0,0 +1,53 @@
+package org.openrndr.extra.fx.edges
+
+import org.openrndr.draw.*
+import org.openrndr.extra.fx.filterFragmentCode
+import org.openrndr.extra.fx.ColorBufferDescription
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.IntParameter
+import org.openrndr.math.Vector2
+
+
+internal class EdgesWork1 : Filter(Shader.createFromCode(filterVertexCode, filterFragmentCode("edges/edges-work-1.frag"))) {
+    var delta: Vector2 by parameters
+
+    init {
+        delta = Vector2.ZERO
+    }
+}
+
+@Description("Edges Work")
+open class EdgesWork : Filter(Shader.createFromCode(filterVertexCode, filterFragmentCode("edges/edges-work-2.frag"))) {
+    /**
+     * radius, default value is 1.0
+     */
+    @IntParameter("radius", 1, 400)
+    var radius: Int by parameters
+
+    private var delta: Vector2 by parameters
+
+    private val work1 = EdgesWork1()
+
+    private var intermediateCache = mutableMapOf<ColorBufferDescription, ColorBuffer>()
+
+    init {
+        radius = 1
+        delta = Vector2.ZERO
+    }
+
+    override fun apply(source: Array<ColorBuffer>, target: Array<ColorBuffer>) {
+        val intermediateDescription = ColorBufferDescription(target[0].width, target[0].height, target[0].contentScale, target[0].format, target[0].type)
+        val intermediate = intermediateCache.getOrPut(intermediateDescription) {
+            colorBuffer(target[0].width, target[0].height, target[0].contentScale, target[0].format, target[0].type)
+        }
+
+        intermediate.let {
+            work1.delta = Vector2(radius / it.effectiveWidth.toDouble(), 0.0)
+            work1.apply(source, arrayOf(it))
+
+            parameters["delta"] = Vector2(0.0, radius / it.effectiveHeight.toDouble())
+            super.apply(arrayOf(it), target)
+        }
+    }
+}
+

orx-fx/src/main/kotlin/edges/LumaSobel.kt

@@ -8,7 +8,7 @@ import org.openrndr.extra.parameters.ColorParameter
 import org.openrndr.extra.parameters.Description
 import org.openrndr.extra.parameters.DoubleParameter
 
-@Description("Luma threshold ")
+@Description("Luma Sobel")
 class LumaSobel : Filter(Shader.createFromCode(Filter.filterVertexCode, filterFragmentCode("edges/luma-sobel.frag"))) {
 
     @ColorParameter("background color")