[orx-compute-graph] Add compute graph code

orx-compute-graph-nodes/src/commonMain/kotlin/FilterNode.kt

@@ -0,0 +1,27 @@
+package org.openrndr.extra.computegraph.nodes
+
+import org.openrndr.draw.ColorBuffer
+import org.openrndr.draw.Filter
+import org.openrndr.draw.createEquivalent
+import org.openrndr.extra.computegraph.ComputeGraph
+import org.openrndr.extra.computegraph.ComputeNode
+import org.openrndr.extra.computegraph.withKey
+
+fun <T : Filter> ComputeGraph.filterNode(
+    filter: T, input: ComputeNode, inputKey: String = "image", outputKey: String = "image",
+    config: ComputeNode.(f: Filter) -> Unit
+): ComputeNode {
+    return node {
+        name = "filter-${filter::class.simpleName}"
+        inputs = filter.parameters
+        config(filter)
+        val inputImage by input.outputs.withKey<ColorBuffer>(inputKey)
+        var outputImage by outputs.withKey<ColorBuffer>(outputKey)
+        outputImage = inputImage.createEquivalent()
+        compute {
+            filter.apply(inputImage, outputImage)
+        }
+        dependOn(input)
+
+    }
+}

orx-compute-graph-nodes/src/commonMain/kotlin/FitImageNode.kt

@@ -0,0 +1,29 @@
+package org.openrndr.extra.computegraph.nodes
+
+import org.openrndr.Program
+import org.openrndr.draw.ColorBuffer
+import org.openrndr.draw.isolatedWithTarget
+import org.openrndr.draw.renderTarget
+import org.openrndr.extra.computegraph.ComputeGraph
+import org.openrndr.extra.computegraph.ComputeNode
+import org.openrndr.extra.computegraph.withKey
+import org.openrndr.extras.imageFit.imageFit
+
+fun ComputeGraph.fitImageNode(program: Program, input: ComputeNode) : ComputeNode {
+    return node {
+        name = "fit-image"
+        val rt = renderTarget(program.width, program.height) {
+            colorBuffer()
+        }
+        val inputImage: ColorBuffer by input.outputs.withKey("image")
+        var outputImage:ColorBuffer by outputs.withKey("image")
+        outputImage = rt.colorBuffer(0)
+        compute {
+            program.drawer.isolatedWithTarget(rt) {
+                ortho(rt)
+                imageFit(inputImage, bounds)
+            }
+        }
+        dependOn(input)
+    }
+}