[orx-composition, orx-svg] Move Composition and SVG code from OPENRNDR to ORX

orx-composition/src/commonMain/kotlin/ProgramExtensions.kt

@@ -0,0 +1,36 @@
+package org.openrndr.extra.composition
+
+import org.openrndr.Program
+import org.openrndr.shape.Rectangle
+import kotlin.contracts.ExperimentalContracts
+import kotlin.contracts.InvocationKind
+import kotlin.contracts.contract
+
+// Derives Composition dimensions from current Drawer
+@OptIn(ExperimentalContracts::class)
+fun Program.drawComposition(
+    documentBounds: CompositionDimensions = CompositionDimensions(0.0.pixels, 0.0.pixels, this.drawer.width.toDouble().pixels, this.drawer.height.toDouble().pixels),
+    composition: Composition? = null,
+    cursor: GroupNode? = composition?.root as? GroupNode,
+    drawFunction: CompositionDrawer.() -> Unit
+): Composition {
+    contract {
+        callsInPlace(drawFunction, InvocationKind.EXACTLY_ONCE)
+    }
+    return CompositionDrawer(documentBounds, composition, cursor).apply { drawFunction() }.composition
+}
+
+@OptIn(ExperimentalContracts::class)
+fun Program.drawComposition(
+    documentBounds: Rectangle,
+    composition: Composition? = null,
+    cursor: GroupNode? = composition?.root as? GroupNode,
+    drawFunction: CompositionDrawer.() -> Unit
+): Composition {
+    contract {
+        callsInPlace(drawFunction, InvocationKind.EXACTLY_ONCE)
+    }
+    return CompositionDrawer(CompositionDimensions(documentBounds), composition, cursor).apply { drawFunction() }.composition
+}
+
+