gistfile1.cs

        public unsafe void WriteToBitmap(System.Drawing.Bitmap bitmap)
        {
            Contract.Requires(bitmap != null);

            var bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);

            unchecked
            {
                int* ptr = (int*)bmpData.Scan0.ToPointer();
                fixed (Vector4f* cptr = &(this.Pixels[0]))
                {
                    float* fp = (float*)cptr;
                    int max = this.Pixels.Length - 1;
                    for (int i = -1, n = -1; i < max; )
                    {
                        ptr[++i] = (byte)(fp[++n] * 255) | (byte)(fp[++n] * 255) << 8 | (byte)(fp[++n] * 255) << 16 | (byte)(fp[++n] * 255) << 24;
                    }
                }
            }

            bitmap.UnlockBits(bmpData);
        }