public async Task <byte[]> ApplyAsync(ISffPngImageHeader imageHeader, byte[] imageData, IPalette palette)
        {
            // (Scanline filter byte + imageHeader.Width * 4 RGBA bytes) * imageHeader.Height == imageData.Length
            if ((1 + imageHeader.Width * 4) * imageHeader.Height == imageData.Length)
            {
                // Already in RGBA format
                return(imageData);
            }

            if (palette == null)
            {
                throw new ArgumentNullException($"Palette is required to decode PNG image.");
            }

            var coloredImage = new List <byte>();

            for (var index = 0; index < imageData.Length; ++index)
            {
                var paletteIndex = imageData[index];

                // For scanline filter type we don't want to perform colorization
                if (index == 0 || index % imageHeader.BytesInRow == 0)
                {
                    coloredImage.Add(paletteIndex);
                    continue;
                }

                var color = palette.ElementAt(paletteIndex);

                coloredImage.Add(color.Red);
                coloredImage.Add(color.Green);
                coloredImage.Add(color.Blue);
                coloredImage.Add(color.Alpha);
            }

            return(coloredImage.ToArray());
        }