Clandestine.Texture.ChromaKeyIfNecessary C# (CSharp) Method

        private static Bitmap ChromaKeyIfNecessary(Bitmap bmp, bool treatAsIndexed)
        {
            if (treatAsIndexed || (bmp.PixelFormat & PixelFormat.Indexed) == PixelFormat.Indexed)
            {
                if (treatAsIndexed)
                    Log.v("treatAsIndexed=true");
                Log.v("Got an indexed bitmap. Doing chroma-keying with zelda-pink chroma. (225,0,126)");
                Bitmap bmpNew = ConvertTo32bppBitmap(bmp);
                bmp.Dispose();
                bmp = bmpNew;
                ChromaKey32bppBitmap(bmp, Color.FromArgb(225, 0, 126));
                return bmp;
            }

            // If 24bpp, chroma-key based on pixel at coords (0,0) (top-left)
            if (!((bmp.PixelFormat & PixelFormat.Alpha) == PixelFormat.Alpha))
            {
                DateTime dtConvStart = DateTime.Now;

                // ah. chroma-keying time! what fun.
                Bitmap bmpNew = ConvertTo32bppBitmap(bmp);
                bmp.Dispose();

                bmp = bmpNew;

                ChromaKey32bppBitmap(bmp, bmp.GetPixel(0, 0));

                DateTime dtConvEnd = DateTime.Now;
                Log.i("Bitmap chroma-keying of bitmap of size " + bmp.Size.ToString()
                    + " took " + (dtConvEnd - dtConvStart).TotalMilliseconds.ToString()
                    + "ms.");
            }

            return bmp;
        }