From f542d9ce8bd755f87aa6b316c56001a253d591ae Mon Sep 17 00:00:00 2001
From: Alireza <ar.sedghi@gmail.com>
Date: Thu, 19 Jan 2023 23:01:21 -0500
Subject: [PATCH] fix: monochrome1 bug for stackviewport (#378)

---
 packages/core/src/RenderingEngine/StackViewport.ts | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/packages/core/src/RenderingEngine/StackViewport.ts b/packages/core/src/RenderingEngine/StackViewport.ts
index 34be3a148c..bcb8fc337b 100644
--- a/packages/core/src/RenderingEngine/StackViewport.ts
+++ b/packages/core/src/RenderingEngine/StackViewport.ts
@@ -1806,6 +1806,13 @@ class StackViewport extends Viewport implements IStackViewport {
     cfun.addRGBPoint(upper, 1.0, 1.0, 1.0);
     actor.getProperty().setRGBTransferFunction(0, cfun);
 
+    let invert = false;
+    if (imagePixelModule.photometricInterpretation === 'MONOCHROME1') {
+      invert = true;
+    }
+
+    this.setProperties({ invert });
+
     // Saving position of camera on render, to cache the panning
     const { focalPoint } = this.getCamera();
     this.cameraFocalPointOnRender = focalPoint;