From 7a52d40ae23c148f27116cb1f6e897b9143b372c Mon Sep 17 00:00:00 2001
From: Peter Hillman <peterh@wetafx.co.nz>
Date: Tue, 21 Jan 2020 12:04:13 +1300
Subject: [PATCH 07/23] bypass SSE optimization when skipping subsampled
 channels

Signed-off-by: Peter Hillman <peterh@wetafx.co.nz>
---
 OpenEXR/IlmImf/ImfScanLineInputFile.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

--- a/IlmImf/ImfScanLineInputFile.cpp
+++ b/IlmImf/ImfScanLineInputFile.cpp
@@ -1419,6 +1419,14 @@ ScanLineInputFile::setFrameBuffer (const
                       offset+=2;
                       break;
               }
+
+              //
+              // optimization mode cannot currently skip subsampled channels
+              //
+              if (i.channel().xSampling!=1 || i.channel().ySampling!=1)
+              {
+                  optimizationPossible = false;
+              }
               ++i;
 	}