/// <summary>
/// Gets the encoder parameter list.
/// </summary>
/// <returns>The encoder parameter list.</returns>
/// <exception cref="HeifException">An error occurred when creating the encoder parameter.</exception>
private unsafe ReadOnlyCollection <IHeifEncoderParameter> GetEncoderParameterList()
{
var encoderParameters = new List <IHeifEncoderParameter>();
var parameterList = LibHeifNative.heif_encoder_list_parameters(this.encoder);
if (parameterList.Value != IntPtr.Zero)
{
var encoderParameter = (heif_encoder_parameter *)parameterList.Value;
while (*encoderParameter != heif_encoder_parameter.Null)
{
encoderParameters.Add(HeifEncoderParameterFactory.Create(this.encoder, *encoderParameter));
encoderParameter++;
}
}
return(encoderParameters.AsReadOnly());
}