[orx-fx] convert to MPP

orx-fx/src/commonMain/kotlin/distort/StackRepeat.kt

@@ -0,0 +1,51 @@
+package org.openrndr.extra.fx.distort
+
+import org.openrndr.draw.*
+import org.openrndr.extra.fx.fx_stack_repeat
+import org.openrndr.extra.fx.mppFilterShader
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+import org.openrndr.extra.parameters.IntParameter
+
+@Description("Stack repeat")
+class StackRepeat : Filter(mppFilterShader(fx_stack_repeat, "stack-repeat")) {
+    @DoubleParameter("zoom", -1.0, 1.0, order = 0)
+    var zoom: Double by parameters
+
+    @DoubleParameter("x-origin", -1.0, 1.0, order = 1)
+    var xOrigin: Double by parameters
+
+    @DoubleParameter("y-origin", -1.0, 1.0, order = 2)
+    var yOrigin: Double by parameters
+
+    @DoubleParameter("x-offset", -1.0, 1.0, order = 3)
+    var xOffset: Double by parameters
+
+    @DoubleParameter("y-offset", -1.0, 1.0, order = 4)
+    var yOffset: Double by parameters
+
+    @DoubleParameter("rotation", -180.0, 180.0, order = 5)
+    var rotation: Double by parameters
+
+    @IntParameter("repeats", 0, 16, order = 6)
+    var repeats: Int by parameters
+
+    init {
+        zoom = 0.0
+        repeats = 2
+        xOffset = 0.0
+        yOffset = 0.0
+        xOrigin = 0.0
+        yOrigin = 0.0
+        rotation = 0.0
+    }
+
+    var bicubicFiltering = true
+    override fun apply(source: Array<ColorBuffer>, target: Array<ColorBuffer>) {
+        if (bicubicFiltering && source.isNotEmpty()) {
+            source[0].generateMipmaps()
+            source[0].filter(MinifyingFilter.LINEAR_MIPMAP_LINEAR, MagnifyingFilter.LINEAR)
+        }
+        super.apply(source, target)
+    }
+}