public static ColorerMatrixDescriptor Get(ColorerMatrixType type, float?value = default)
{
var methods = typeof(ColorerMatrix).GetMethods(BindingFlags.Public | BindingFlags.Static)
.Where(m => m.GetCustomAttributes(typeof(ColorerMatrixAttribute), false).Length != 0).ToArray();
foreach (var m in methods)
{
var attrs = m.GetCustomAttributes(typeof(ColorerMatrixAttribute), false).OfType <ColorerMatrixAttribute>().ToArray();
foreach (var attr in attrs)
{
if (attr.Type == type)
{
if (attr.IsValueRequired && value.HasValue)
{
if (value.Value < attr.MinimumValue)
{
throw new ArgumentException(string.Format("Value has to be between {0} and {1}.", attr.MinimumValue, attr.MaximumValue), nameof(value));
}
if (value.Value > attr.MaximumValue)
{
throw new ArgumentException(string.Format("Value has to be between {0} and {1}.", attr.MinimumValue, attr.MaximumValue), nameof(value));
}
}
return(new ColorerMatrixDescriptor(
v => (ColorMatrix)m.Invoke(default, attr.IsValueRequired ? new object[] { v } : default),
public ColorerMatrixAttribute(ColorerMatrixType type, bool isValueRequired, float defaultValue = 0, float minimumValue = 0, float maximumValue = 0)
{
Type = type;
IsValueRequired = isValueRequired;
if (defaultValue < minimumValue)
{
throw new ArgumentException(string.Format("The value of {0} cannot be smaller than the value of {1}.", nameof(defaultValue), nameof(minimumValue)), nameof(defaultValue));
}
if (maximumValue < defaultValue)
{
throw new ArgumentException(string.Format("The value of {0} cannot be smaller than the value of {1}.", nameof(maximumValue), nameof(defaultValue)), nameof(defaultValue));
}
DefaultValueValue = defaultValue;
MinimumValueValue = minimumValue;
MaximumValueValue = maximumValue;
}
public ColorerMatrixAttribute(ColorerMatrixType type) : this(type, false)
{
}
