From bac8080b0c130b85cfe7d875cb73c993cd31fef8 Mon Sep 17 00:00:00 2001
From: dschoni <jonathan.schock@tum.de>
Date: Tue, 21 May 2019 14:14:10 +0200
Subject: [PATCH] Typecast Levels to be float

This circumvents cases in which "levels" is a boolean array and therefore the substraction fails due to deprecation.
---
 pyqtgraph/functions.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pyqtgraph/functions.py b/pyqtgraph/functions.py
index fe3f9910..1fa10f5c 100644
--- a/pyqtgraph/functions.py
+++ b/pyqtgraph/functions.py
@@ -1057,6 +1057,7 @@ def makeARGB(data, lut=None, levels=None, scale=None, useRGBA=False):
             raise Exception('levels argument is required for float input types')
     if not isinstance(levels, np.ndarray):
         levels = np.array(levels)
+    levels = levels.astype(np.float)
     if levels.ndim == 1:
         if levels.shape[0] != 2:
             raise Exception('levels argument must have length 2')