bypass SSE optimization when skipping subsampled channels

Signed-off-by: Peter Hillman <peterh@wetafx.co.nz>
AcademySoftwareFoundation · Jan 20, 2020 · 8b97a01 · 8b97a01
1 parent 2c5c1ae
commit 8b97a01
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/OpenEXR/IlmImf/ImfScanLineInputFile.cpp b/OpenEXR/IlmImf/ImfScanLineInputFile.cpp
@@ -1432,6 +1432,14 @@ ScanLineInputFile::setFrameBuffer (const FrameBuffer &frameBuffer)
                       // not possible.
                       break;
               }
+
+              //
+              // optimization mode cannot currently skip subsampled channels
+              //
+              if (i.channel().xSampling!=1 || i.channel().ySampling!=1)
+              {
+                  optimizationPossible = false;
+              }
               ++i;
 	}