private void ApplyStateCore(GraphicsContext ctx, ShaderProgram program, ViewportState currentState)
{
if (_Viewport[0] != currentState._Viewport[0] || _Viewport[1] != currentState._Viewport[1] ||
_Viewport[2] != currentState._Viewport[2] || _Viewport[3] != currentState._Viewport[3])
{
Gl.Viewport(_Viewport[0], _Viewport[1], _Viewport[2], _Viewport[3]);
}
}
/// <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;
return(true);
}
/// <summary>
/// Set ShaderProgram state.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> which has defined the shader program <paramref name="program"/>.
/// </param>
/// <param name="program">
/// The <see cref="ShaderProgram"/> which has the state set.
/// </param>
public override void Apply(GraphicsContext ctx, ShaderProgram program)
{
if (ctx == null)
{
throw new ArgumentNullException("ctx");
}
ViewportState currentState = (ViewportState)ctx.GetCurrentState(StateIndex);
if (currentState != null)
{
ApplyStateCore(ctx, program, currentState);
}
else
{
ApplyStateCore(ctx, program);
}
ctx.SetCurrentState(this);
}
