/// <summary>
/// Initializes a new instance for the given FITAG that contains
/// a palette.
/// </summary>
/// <param name="tag">The tag containing the palette.</param>
/// <exception cref="ArgumentNullException"><paramref name="tag"/> is null.</exception>
/// <exception cref="ArgumentException"><paramref name="tag"/> is not
/// <see cref="FREE_IMAGE_MDTYPE.FIDT_PALETTE"/>.</exception>
public Palette(FITAG tag)
: base(FreeImage.GetTagValue(tag), (int)FreeImage.GetTagCount(tag))
{
if (FreeImage.GetTagType(tag) != FREE_IMAGE_MDTYPE.FIDT_PALETTE)
{
throw new ArgumentException("tag");
}
}
/// <summary>
/// Initializes a new instance for the given MetadataTag that contains
/// a palette.
/// </summary>
/// <param name="tag">The tag containing the palette.</param>
/// <exception cref="ArgumentException"><paramref name="tag"/> is not
/// <see cref="FREE_IMAGE_MDTYPE.FIDT_PALETTE"/>.</exception>
public Palette(MetadataTag tag)
: base(FreeImage.GetTagValue(tag.tag), (int)tag.Count)
{
if (FreeImage.GetTagType(tag) != FREE_IMAGE_MDTYPE.FIDT_PALETTE)
{
throw new ArgumentException("tag");
}
}
/// <summary>
/// Initializes a new instance based on the specified parameters.
/// </summary>
/// <param name="tag">The tag to read the data from.</param>
public unsafe FIRational(FITAG tag)
{
switch (FreeImage.GetTagType(tag))
{
case FREE_IMAGE_MDTYPE.FIDT_SRATIONAL:
int* value = (int*)FreeImage.GetTagValue(tag);
numerator = (int)value[0];
denominator = (int)value[1];
Normalize();
return;
default:
throw new ArgumentException("tag");
}
}