namespace UglyToad.Pdf.Graphics
{
    internal enum RenderingIntent
    {
        /// <summary>
        /// No correction for the output medium's white point. Colors 
        /// only represented relative to the light source.
        /// </summary>
        AbsoluteColorimetric = 0,
        /// <summary>
        /// Combines light source and output medium's white point.
        /// </summary>
        RelativeColorimetric = 1,
        /// <summary>
        /// Emphasises saturation rather than colorimetric accuracy.
        /// </summary>
        Saturation = 2,
        /// <summary>
        /// Modifies from colorimetric values to provide a "pleasing perceptual appearance".
        /// </summary>
        Perceptual = 3
    }

    internal static class RenderingIntentExtensions
    {
        public static RenderingIntent ToRenderingIntent(this string s)
        {
            switch (s)
            {
                case "AbsoluteColorimetric":
                    return RenderingIntent.AbsoluteColorimetric;
                   case "RelativeColorimetric":
                    return RenderingIntent.RelativeColorimetric;
                case "Saturation":
                    return RenderingIntent.Saturation;
                case "Perceptual":
                    return RenderingIntent.Perceptual;
                default:
                    // If the application does not recognise the name it uses RelativeColorimetric by default.
                    return RenderingIntent.RelativeColorimetric;
            }
        }
    }
}