ImfAcesFile.cpp: Fix primary conversion edge case.

This fixes the edge case when the file chromaticities.white != file adopted neutral. In such a scenario the adoptedNeutral file attr must be used as the display white point value passed into RGBtoXYZ() method since the adaption matrix (Bradform Transform) is computed using the adopted neutral as its input white point. Signed-off-by: Arkell Rasiah <[email protected]>
AcademySoftwareFoundation · Feb 26, 2020 · adc21e5 · adc21e5
1 parent 3576a8b
commit adc21e5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/OpenEXR/IlmImf/ImfAcesFile.cpp b/OpenEXR/IlmImf/ImfAcesFile.cpp
@@ -395,7 +395,10 @@ AcesInputFile::Data::initColorConversion ()
     V2f fileNeutral = fileChr.white;
 
     if (hasAdoptedNeutral (header))
+    {
 	fileNeutral = adoptedNeutral (header);
+        fileChr.white = fileNeutral; // for RGBtoXYZ() purposes.
+    }
 
     const Chromaticities acesChr = acesChromaticities();