CSharpGL.TextureHelper.UpdateContent C# (CSharp) Метод

        public static void UpdateContent(this Texture texture, Bitmap bitmap)
        {
            //  Lock the image bits (so that we can pass them to OGL).
            BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
                ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);

            OpenGL.BindTexture((uint)texture.Target, texture.Id);
            if (texture.Target == TextureTarget.Texture1D)
            {
                OpenGL.TexImage1D((uint)texture.Target, 0, (int)OpenGL.GL_RGBA, bitmapData.Width, 0, OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, bitmapData.Scan0);
            }
            else if (texture.Target == TextureTarget.Texture2D)
            {
                OpenGL.TexImage2D((uint)texture.Target, 0, (int)OpenGL.GL_RGBA, bitmapData.Width, bitmapData.Height, 0, OpenGL.GL_BGRA, OpenGL.GL_UNSIGNED_BYTE, bitmapData.Scan0);
            }
            else
            { throw new NotImplementedException(); }
            OpenGL.BindTexture((uint)texture.Target, 0);

            //  Unlock the image.
            bitmap.UnlockBits(bitmapData);

            //// TODO: TexSubImage2D() do not work. why?
            //BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
            //    ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
            //OpenGL.BindTexture(this.Target, this.Id);
            //OpenGL.TexSubImage2D(this.Target, 0, 0, 0, bitmap.Width, bitmap.Height, OpenGL.GL_RGBA, OpenGL.GL_UNSIGNED_BYTE, bitmapData.Scan0);
            //OpenGL.TexSubImage2D(TexSubImage2DTarget.Texture2D, 0, 0, 0, bitmap.Width, bitmap.Height, TexSubImage2DFormats.RGBA, TexSubImage2DType.UnsignedByte, bitmapData.Scan0);
            //OpenGL.BindTexture(this.Target, 0);
            //bitmap.UnlockBits(bitmapData);
        }