/// <summary>
/// Get the depth of the alpha channel of the image.
/// </summary>
/// <returns>The depth of the alpha channel in bits</returns>
public int GetAlphaDepth()
{
// TODO: Improve this function so that it checks that actual data (will probably need to add the region to check as parameter)
int alphaDepth = Format.AlphaSizeInBits();
if (OriginalAlphaDepth == -1)
{
return(alphaDepth);
}
return(Math.Min(alphaDepth, OriginalAlphaDepth));
}