[orx-fx] convert to MPP

orx-fx/src/commonMain/kotlin/grain/FilmGrain.kt

@@ -0,0 +1,40 @@
+import org.openrndr.draw.Filter
+import org.openrndr.extra.fx.fx_film_grain
+import org.openrndr.extra.fx.mppFilterShader
+import org.openrndr.extra.parameters.BooleanParameter
+import org.openrndr.extra.parameters.Description
+import org.openrndr.extra.parameters.DoubleParameter
+/**
+ * Film grain filter
+ */
+@Description("film grain")
+class FilmGrain : Filter(mppFilterShader(fx_film_grain, "film-grain")) {
+    @BooleanParameter("use color")
+    var useColor: Boolean by parameters
+
+    var time: Double by parameters;
+
+    @DoubleParameter("grain lift ratio", 0.0, 1.0)
+    var grainLiftRatio: Double by parameters
+
+    @DoubleParameter("grain strength", 0.0, 1.0)
+    var grainStrength: Double by parameters
+
+    @DoubleParameter("grain rate", 0.0, 1.0)
+    var grainRate: Double by parameters
+
+    @DoubleParameter("grain pitch", 0.0, 1.0)
+    var grainPitch: Double by parameters
+
+    @DoubleParameter("color level", 0.0, 1.0)
+    var colorLevel: Double by parameters
+
+    init {
+        useColor = false
+        grainLiftRatio = 0.5
+        grainStrength = 1.0
+        grainRate = 1.0
+        grainPitch = 1.0
+        colorLevel = 1.0
+    }
+}