Added methods to expose the unmanaged pixel array.

src/Graphics/Image.cs

@@ -100,6 +100,44 @@ public class Image : ObjectBase
                 throw new LoadingFailedException("image");
         }
 
+        ////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Construct the image from a file in memory
+        /// </summary>
+        /// <param name="bytes">Byte array containing the file contents</param>
+        /// <param name="length">The length of the byte array</param>
+        /// <exception cref="ArgumentException">The passed in pointer is zero or the length is less or equal to zero.</exception>
+        /// <exception cref="LoadingFailedException" />
+        ////////////////////////////////////////////////////////////
+        public Image(IntPtr bytes, ulong length) :
+            base(IntPtr.Zero)
+        {
+            if (bytes == IntPtr.Zero)
+                throw new ArgumentException("The pointer to byte array must not be null.", nameof(bytes));
+
+            if (length <= 0u)
+                throw new ArgumentException("The length of the byte array must be greater than zero.", nameof(length));
+
+            CPointer = sfImage_createFromMemory(bytes, length);
+
+            if (CPointer == IntPtr.Zero)
+                throw new LoadingFailedException("image");
+        }
+
+        ////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Construct the image from a file in memory
+        /// </summary>
+        /// <param name="bytes">Byte array containing the file contents</param>
+        /// <param name="length">The length of the byte array</param>
+        /// <exception cref="ArgumentException">The passed in pointer is zero or the length is less or equal to zero.</exception>
+        /// <exception cref="LoadingFailedException" />
+        ////////////////////////////////////////////////////////////
+        public Image(IntPtr bytes, int length) :
+            this(bytes, (ulong) length)
+        {
+        }
+
         ////////////////////////////////////////////////////////////
         /// <summary>
         /// Construct the image directly from an array of pixels
@@ -293,6 +331,57 @@ public byte[] Pixels
             }
         }
 
+        ////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Returns the pointer to the pixel data in unmanaged memory.
+        /// </summary>
+        /// <remarks>
+        /// No memory is copied.
+        /// </remarks>
+        /// <param name="length">Length of the array in unmanaged memory.</param>
+        /// <returns>Pointer to the pixel data</returns>
+        ////////////////////////////////////////////////////////////
+        public IntPtr GetNativeData(out int length)
+        {
+            ulong l;
+            IntPtr data = GetNativeData(out l);
+            length = (int) l;
+            return data;
+        }
+
+        ////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Returns the pointer to the pixel data in unmanaged memory.
+        /// </summary>
+        /// <remarks>
+        /// No memory is copied.
+        /// </remarks>
+        /// <param name="length">Length of the array in unmanaged memory.</param>
+        /// <returns>Pointer to the pixel data</returns>
+        ////////////////////////////////////////////////////////////
+        public IntPtr GetNativeData(out ulong length)
+        {
+            Vector2u size = Size;
+            length = size.X * size.Y * 4;
+            return sfImage_getPixelsPtr(CPointer);
+        }
+
+        ////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Returns the pointer to the pixel data in unmanaged memory.
+        /// </summary>
+        /// <remarks>
+        /// No memory is copied.
+        /// The length of the array in unmanaged memory is "width * height * 4".
+        /// </remarks>
+        /// <returns>Pointer to the pixel data</returns>
+        ////////////////////////////////////////////////////////////
+        public IntPtr GetNativeData()
+        {
+            ulong l;
+            return GetNativeData(out l);
+        }
+
         ////////////////////////////////////////////////////////////
         /// <summary>
         /// Size of the image, in pixels