fix(exr): fill in OpenEXR lineOrder attribute when reading

Author: vernalchen

src/openexr.imageio/exrinput_c.cpp

@@ -729,12 +729,23 @@ OpenEXRCoreInput::PartInfo::parse_header(OpenEXRCoreInput* in,
             break;
         }
 
+        case EXR_ATTR_LINEORDER: {
+            std::string lineOrder = "increasingY";
+            switch (attr->uc) {
+            case EXR_LINEORDER_INCREASING_Y: lineOrder = "increasingY"; break;
+            case EXR_LINEORDER_DECREASING_Y: lineOrder = "decreasingY"; break;
+            case EXR_LINEORDER_RANDOM_Y: lineOrder = "randomY"; break;
+            default: break;
+            }
+            spec.attribute("openexr:lineOrder", lineOrder);
+            break;
+        }
+
         case EXR_ATTR_PREVIEW:
         case EXR_ATTR_OPAQUE:
         case EXR_ATTR_ENVMAP:
         case EXR_ATTR_COMPRESSION:
         case EXR_ATTR_CHLIST:
-        case EXR_ATTR_LINEORDER:
         case EXR_ATTR_TILEDESC:
         default:
 #if 0