1 files changed, 18 insertions, 1 deletions
diff --git a/UVtools.Core/Extensions/EmguExtensions.cs b/UVtools.Core/Extensions/EmguExtensions.cs
index 64b2dc5..b5ed369 100644
--- a/UVtools.Core/Extensions/EmguExtensions.cs
+++ b/UVtools.Core/Extensions/EmguExtensions.cs
@@ -63,10 +63,27 @@ namespace UVtools.Core.Extensions
 
         public static unsafe Span<T> GetPixelRowSpan<T>(this Mat mat, int y, int length = 0, int offset = 0)
         {
-            return new Span<T>(IntPtr.Add(mat.DataPointer, y * mat.Step + offset).ToPointer(), length == 0 ? mat.Step : length);
+            return new(IntPtr.Add(mat.DataPointer, y * mat.Step + offset).ToPointer(), length == 0 ? mat.Step : length);
             //return mat.GetPixelSpan<T>().Slice(offset, mat.Step);
         }
 
+        /// <summary>
+        /// Gets if a <see cref="Mat"/> is all zeroed
+        /// </summary>
+        /// <param name="mat"></param>
+        /// <param name="threshold">Pixel brightness threshold</param>
+        /// <returns></returns>
+        public static unsafe bool IsZeroed(this Mat mat, byte threshold = 0)
+        {
+            var ptr = mat.GetBytePointer();
+            for (int i = 0; i < mat.GetLength(); i++)
+            {
+                if (ptr[i] > threshold) return false;
+            }
+            return true;
+        }
+
+
         public static void Transform(this Mat src, double xScale, double yScale, double xTrans = 0, double yTrans = 0, Size dstSize = default, Inter interpolation = Inter.Linear)
         {
             //var dst = new Mat(src.Size, src.Depth, src.NumberOfChannels);