/// <summary>
/// Gets a .NET PropertyItem for this metadata tag.
/// </summary>
/// <returns>The .NET PropertyItem.</returns>
public unsafe System.Drawing.Imaging.PropertyItem GetPropertyItem()
{
System.Drawing.Imaging.PropertyItem item = FreeImage.CreatePropertyItem();
item.Id = ID;
item.Len = (int)Length;
item.Type = (short)Type;
FreeImage.CopyMemory(item.Value = new byte[item.Len], FreeImage.GetTagValue(tag), item.Len);
return(item);
}
/// <summary>
/// Sets the value of this tag to the value of <paramref name="value"/>
/// using the given type.
/// </summary>
/// <param name="value">New value of the tag.</param>
/// <param name="type">Data-type of the tag.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="value"/> is a null reference.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="type"/> is FIDT_ASCII and
/// <paramref name="value"/> is not String.
/// <paramref name="type"/> is not FIDT_ASCII and
/// <paramref name="value"/> is not Array.</exception>
/// <exception cref="NotSupportedException">
/// <paramref name="type"/> is FIDT_NOTYPE.</exception>
private unsafe bool SetArrayValue(object value, FREE_IMAGE_MDTYPE type)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
byte[] data = null;
if (type == FREE_IMAGE_MDTYPE.FIDT_ASCII)
{
string tempValue = value as string;
if (tempValue == null)
{
throw new ArgumentException("value");
}
Type = type;
Length = Count = (uint)tempValue.Length;
data = new byte[Length];
for (int i = 0; i < tempValue.Length; i++)
{
data[i] = (byte)tempValue[i];
}
}
else if (type == FREE_IMAGE_MDTYPE.FIDT_NOTYPE)
{
throw new NotSupportedException("type is not supported.");
}
else
{
Array array = value as Array;
if (array == null)
{
throw new ArgumentException("value");
}
if (array.Length != 0)
{
if (!CheckType(array.GetValue(0).GetType(), type))
{
throw new ArgumentException("The type of value is incorrect.");
}
}
Type = type;
Count = (uint)array.Length;
Length = (uint)(array.Length * Marshal.SizeOf(idList[type]));
data = new byte[Length];
FreeImage.CopyMemory(data, array, Length);
}
return(FreeImage.SetTagValue(tag, data));
}
/// <summary>
/// Sets the value of this tag to the value of <paramref name="value"/>
/// using the given type.
/// </summary>
/// <param name="value">New value of the tag.</param>
/// <param name="type">Data-type of the tag.</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="value"/> is a null reference.
/// </exception>
/// <exception cref="ArgumentException">
/// <paramref name="type"/> is FIDT_ASCII and
/// <paramref name="value"/> is not String.
/// <paramref name="type"/> is not FIDT_ASCII and
/// <paramref name="value"/> is not Array.</exception>
/// <exception cref="NotSupportedException">
/// <paramref name="type"/> is FIDT_NOTYPE.</exception>
private unsafe bool SetArrayValue(object value, FREE_IMAGE_MDTYPE type)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
byte[] data = null;
if (type == FREE_IMAGE_MDTYPE.FIDT_ASCII)
{
string tempValue = value as string;
if (tempValue == null)
{
throw new ArgumentException("value");
}
Type = type;
Count = (uint)(tempValue.Length + 1);
Length = (uint)((tempValue.Length * sizeof(byte)) + 1);
data = new byte[Length + 1];
for (int i = 0; i < tempValue.Length; i++)
{
data[i] = (byte)tempValue[i];
}
data[data.Length - 1] = 0;
}
else if (type == FREE_IMAGE_MDTYPE.FIDT_NOTYPE)
{
throw new NotSupportedException();
}
else
{
Array array = value as Array;
if (array == null)
{
throw new ArgumentException("value");
}
Type = type;
Count = (uint)array.Length;
Length = (uint)(array.Length * Marshal.SizeOf(idList[type]));
data = new byte[Length];
GCHandle handle = GCHandle.Alloc(array, GCHandleType.Pinned);
void * src = (void *)Marshal.UnsafeAddrOfPinnedArrayElement(array, 0);
fixed(byte *dst = data)
{
FreeImage.CopyMemory(dst, src, Length);
}
handle.Free();
}
return(FreeImage.SetTagValue(tag, data));
}