Cairo.ImageSurface.ConstructImageSurfaceFromPngData C# (CSharp) Метод

        private static IntPtr ConstructImageSurfaceFromPngData(byte[] pngData)
        {
            NativeMethods.cairo_read_func_t func = delegate(IntPtr closure, IntPtr out_data, int length)
            {
                Marshal.Copy(pngData, offset, out_data, length);
                offset += length;
                return Status.Success;
            };
            return NativeMethods.cairo_image_surface_create_from_png_stream(func, IntPtr.Zero);
        }