From b6c16f08311f0262cce8dc941175eda223f0fe0f Mon Sep 17 00:00:00 2001
From: Edwin Jakobs <edwin@rndr.studio>
Date: Thu, 27 Feb 2020 22:30:46 +0100
Subject: [PATCH] Add access to accumulation buffer in orx-compositor

---
 orx-compositor/src/main/kotlin/Compositor.kt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/orx-compositor/src/main/kotlin/Compositor.kt b/orx-compositor/src/main/kotlin/Compositor.kt
index 35940b9a..555f384b 100644
--- a/orx-compositor/src/main/kotlin/Compositor.kt
+++ b/orx-compositor/src/main/kotlin/Compositor.kt
@@ -32,6 +32,7 @@ open class Layer internal constructor() {
     var blendFilter: Pair<Filter, Filter.() -> Unit>? = null
     val postFilters: MutableList<Pair<Filter, Filter.() -> Unit>> = mutableListOf()
     var colorType = ColorType.UINT8
+    var accumulation: ColorBuffer? = null
 
     @BooleanParameter("enabled")
     var enabled = true
@@ -48,6 +49,11 @@ open class Layer internal constructor() {
 
         val activeRenderTarget = RenderTarget.active
 
+        accumulation = if (activeRenderTarget !is ProgramRenderTarget) {
+            activeRenderTarget.colorBuffer(0)
+        } else {
+          null
+        }
 
         val localLayerTarget = layerTarget
         if (localLayerTarget == null || (localLayerTarget.width != activeRenderTarget.width || localLayerTarget.height != activeRenderTarget.height)) {