namespace GenericImage
{
    public static class ImageMaths
    {
        /// <summary>
        /// Restricts a value to be within a specified range.
        /// </summary>
        /// <param name="value">The value to clamp.</param>
        /// <param name="min">The minimum value. If <c>value</c> is less than <c>min</c>, <c>min</c> will be returned.</param>
        /// <param name="max">The maximum value. If <c>value</c> is greater than <c>max</c>, <c>max</c> will be returned.</param>
        /// <returns>The clamped value.</returns>
        public static float Clamp(float value, float min, float max)
        {
            // This compare order is very important!!!
            // We must follow HLSL behavior in the case user specified min value is bigger than max value.
            // First we check to see if we're greater than the max
            value = (value > max) ? max : value;

            // Then we check to see if we're less than the min.
            value = (value < min) ? min : value;

            // There's no check to see if min > max.
            return value;
        }

        /// <summary>
        /// Restricts a value to be within a specified range.
        /// </summary>
        /// <param name="value">The value to clamp.</param>
        /// <param name="min">The minimum value. If <c>value</c> is less than <c>min</c>, <c>min</c> will be returned.</param>
        /// <param name="max">The maximum value. If <c>value</c> is greater than <c>max</c>, <c>max</c> will be returned.</param>
        /// <returns>The clamped value.</returns>
        public static int Clamp(int value, int min, int max)
        {
            value = (value > max) ? max : value;
            value = (value < min) ? min : value;
            return value;
        }
    }
}