/// <summary>
/// Merge this state with another one.
/// </summary>
/// <param name="state">
/// A <see cref="IGraphicsState"/> having the same <see cref="GraphicsState.StateIdentifier"/> of this state.
/// </param>
/// <remarks>
/// <para>
/// After a call to this routine, this IGraphicsState store the union of the previous information
/// and of the information of <paramref name="state"/>.
/// </para>
/// <para>
/// The semantic of the merge result is dependent on the actual implementation of this IGraphicsState. Normally
/// the merge method will copy <paramref name="state"/> into this IGraphicsState, but other state could do
/// different operations.
/// </para>
/// </remarks>
public override void Merge(IGraphicsState state)
{
if (state == null)
{
throw new ArgumentNullException("state");
}
if (state.StateIdentifier != StateId)
{
throw new ArgumentException("state id mismatch", "state");
}
ViewportState previousState = (ViewportState)state;
ViewportSize = previousState.ViewportSize;
}
/// <summary>
/// Indicates whether the current object is equal to another object of the same type.
/// </summary>
/// <param name="other">
/// A <see cref="GraphicsState"/> to compare to this GraphicsState.
/// </param>
/// <returns>
/// It returns true if the current object is equal to <paramref name="other"/>.
/// </returns>
/// <remarks>
/// <para>
/// This method test only whether <paramref name="other"/> type equals to this type.
/// </para>
/// </remarks>
/// <exception cref="ArgumentNullException">
/// This exception is thrown if the parameter <paramref name="other"/> is null.
/// </exception>
public override bool Equals(IGraphicsState other)
{
if (base.Equals(other) == false)
{
return(false);
}
Debug.Assert(other is ViewportState);
ViewportState otherState = (ViewportState)other;
if (ViewportSize != otherState.ViewportSize)
{
return(false);
}
return(true);
}
