--ignore-mips does not apply to array textures (#567)

Author: walbourn

DirectXTex/DirectXTexDDS.cpp

@@ -378,7 +378,7 @@ namespace
         }
 
         metadata.mipLevels = pHeader->mipMapCount;
-        if ((metadata.mipLevels == 0) || (flags & DDS_FLAGS_IGNORE_MIPS))
+        if (metadata.mipLevels == 0)
         {
             metadata.mipLevels = 1;
         }
@@ -650,6 +650,12 @@ namespace
             }
         }
 
+        // Special-handling flag for ignoring mipchains on simple DDS files
+        if ((flags & DDS_FLAGS_IGNORE_MIPS) && (metadata.arraySize == 1))
+        {
+            metadata.mipLevels = 1;
+        }
+
         // Handle DDS-specific metadata
         if (ddPixelFormat)
         {