Clamp min/max adaptation values in AutoExposure

Author: Chman

PostProcessing/Editor/Effects/AutoExposureEditor.cs

@@ -37,9 +37,15 @@ public override void OnInspectorGUI()
             EditorUtilities.DrawHeaderLabel("Exposure");
 
             PropertyField(m_Filtering);
-
             PropertyField(m_MinLuminance);
             PropertyField(m_MaxLuminance);
+
+            // Clamp min/max adaptation values
+            float minLum = m_MinLuminance.value.floatValue;
+            float maxLum = m_MaxLuminance.value.floatValue;
+            m_MinLuminance.value.floatValue = Mathf.Min(minLum, maxLum);
+            m_MaxLuminance.value.floatValue = Mathf.Max(minLum, maxLum);
+
             PropertyField(m_KeyValue);
 
             EditorGUILayout.Space();

PostProcessing/Runtime/Effects/AutoExposure.cs

@@ -80,6 +80,12 @@ public override void Render(PostProcessRenderContext context)
             highPercent = Mathf.Clamp(highPercent, 1f + kMinDelta, 99f);
             lowPercent = Mathf.Clamp(lowPercent, 1f, highPercent - kMinDelta);
 
+            // Clamp min/max adaptation values as well
+            float minLum = settings.minLuminance.value;
+            float maxLum = settings.maxLuminance.value;
+            settings.minLuminance.value = Mathf.Min(minLum, maxLum);
+            settings.maxLuminance.value = Mathf.Max(minLum, maxLum);
+
             // Compute auto exposure
             sheet.properties.SetBuffer(ShaderIDs.HistogramBuffer, context.logHistogram.data);
             sheet.properties.SetVector(ShaderIDs.Params, new Vector4(lowPercent * 0.01f, highPercent * 0.01f, RuntimeUtilities.Exp2(settings.minLuminance.value), RuntimeUtilities.Exp2(settings.maxLuminance.value)));