From e2aed8b06b01409a1ce8a0f1fc96a1ecdfb691d3 Mon Sep 17 00:00:00 2001
From: Jeff Peck <jeffrey.peck@10xgenomics.com>
Date: Fri, 12 May 2023 18:37:18 -0400
Subject: [PATCH] be more forgiving when fileDirectory.SampleFormat does not
 have all values populated, such as in bioformats ome tif files

---
 src/geotiffimage.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/geotiffimage.js b/src/geotiffimage.js
index 21994643..ce1f4030 100644
--- a/src/geotiffimage.js
+++ b/src/geotiffimage.js
@@ -295,8 +295,7 @@ class GeoTIFFImage {
   }
 
   getReaderForSample(sampleIndex) {
-    const format = this.fileDirectory.SampleFormat
-      ? this.fileDirectory.SampleFormat[sampleIndex] : 1;
+    const format = this.getSampleFormat(sampleIndex);
     const bitsPerSample = this.fileDirectory.BitsPerSample[sampleIndex];
     switch (format) {
       case 1: // unsigned integer data
@@ -339,7 +338,8 @@ class GeoTIFFImage {
 
   getSampleFormat(sampleIndex = 0) {
     return this.fileDirectory.SampleFormat
-      ? this.fileDirectory.SampleFormat[sampleIndex] : 1;
+      ? (this.fileDirectory.SampleFormat[sampleIndex] ?? Math.max.apply(null, this.fileDirectory.SampleFormat))
+      : 1;
   }
 
   getBitsPerSample(sampleIndex = 0) {