From 5dc6fc60c3fa44111bdfb4a2c2206c86f28b1326 Mon Sep 17 00:00:00 2001
From: Melissa Linkert <melissa@glencoesoftware.com>
Date: Mon, 27 Jul 2020 10:26:55 -0500
Subject: [PATCH] Fix sample format tag to preserve floating point pixel type

See https://github.com/glencoesoftware/bioformats2raw/issues/52#issuecomment-664455674
---
 .../pyramid/PyramidFromDirectoryWriter.java           | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/glencoesoftware/pyramid/PyramidFromDirectoryWriter.java b/src/main/java/com/glencoesoftware/pyramid/PyramidFromDirectoryWriter.java
index 468a9ac..d5a1039 100755
--- a/src/main/java/com/glencoesoftware/pyramid/PyramidFromDirectoryWriter.java
+++ b/src/main/java/com/glencoesoftware/pyramid/PyramidFromDirectoryWriter.java
@@ -851,7 +851,16 @@ private IFD makeIFD(PyramidSeries s, int resolution, int plane)
     ifd.put(IFD.COMPRESSION, getTIFFCompression().getCode());
 
     ifd.put(IFD.PLANAR_CONFIGURATION, s.rgb ? 2 : 1);
-    ifd.put(IFD.SAMPLE_FORMAT, 1);
+
+    int sampleFormat = 1;
+    if (FormatTools.isFloatingPoint(s.pixelType)) {
+      sampleFormat = 3;
+    }
+    else if (FormatTools.isSigned(s.pixelType)) {
+      sampleFormat = 2;
+    }
+
+    ifd.put(IFD.SAMPLE_FORMAT, sampleFormat);
 
     int[] bps = new int[s.rgb ? s.c : 1];
     Arrays.fill(bps, FormatTools.getBytesPerPixel(s.pixelType) * 8);