#pragma region CPL License
/*
Nuclex Native Framework
Copyright (C) 2002-2013 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#pragma endregion // CPL License

#ifndef NUCLEX_GRAPHICS_RASTERIZATION_DIRECT3D11POLYGONOPTIONSOBSERVER_H
#define NUCLEX_GRAPHICS_RASTERIZATION_DIRECT3D11POLYGONOPTIONSOBSERVER_H

#include "Nuclex/Graphics/Config.h"
#include "Nuclex/Graphics/Rasterization/PolygonOptions.h"
#include "../Direct3D11Api.h"

namespace Nuclex { namespace Graphics { namespace Rasterization {

  // ------------------------------------------------------------------------------------------- //

  class Direct3D11RasterizerResources;

  // ------------------------------------------------------------------------------------------- //

}}} // namespace Nuclex::Graphics::Rasterization

namespace Nuclex { namespace Graphics { namespace Rasterization {

  // ------------------------------------------------------------------------------------------- //

  ///<summary>Manages an attached Direct3D 11 rasterizer state</summary>
  class Direct3D11PolygonOptionsObserver : public PolygonOptions::Observer {

    /// <summary>Initializes a new Direct3D 11 rasterizer state</summary>
    /// <param name="resources">Manager the index buffer belongs to</param>
    /// <param name="polygonOptions">Polygon options the observer is attached to</param>
    public: Direct3D11PolygonOptionsObserver(
      Direct3D11RasterizerResources &resources, PolygonOptions *polygonOptions
    );

    /// <summary>Frees all resources owned by the polygon options observer</summary>
    public: virtual ~Direct3D11PolygonOptionsObserver();

    /// <summary>Called right before the options are destroyed</summary>
    public: void Destroying();

    /// <summary>Called when the options have been changed</summary>
    public: void Changed();

    /// <summary>Retrieves the agnostic polygon options being observed</summary>
    /// <returns>The agnostic polygon options being observed</returns>
    public: PolygonOptions *GetResource() const { return this->polygonOptions; }

    /// <summary>Retrieves the Direct3D rasterizer state the observer is managing</summary>
    /// <returns>The observer's Direct3D rasterizer state</returns>
    public: const ID3D11RasterizerStateNPtr &GetDirect3DRasterizerState() const {
      return this->direct3DRasterizerState;
    }

    /// <summary>
    ///   Creates a Direct3D rasterizer state matching the observed polygon options
    /// </summary>
    private: void createDirect3DRasterizerState();

    private: Direct3D11PolygonOptionsObserver(const Direct3D11PolygonOptionsObserver &);
    private: Direct3D11PolygonOptionsObserver &operator =(
      const Direct3D11PolygonOptionsObserver &
    );

    /// <summary>Resource manager the polygon options observer belongs to</summary>
    private: Direct3D11RasterizerResources &resources;
    /// <summary>Polygon options this observer is attached to</summary>
    private: PolygonOptions *polygonOptions;
    /// <summary>Rasterizer state managed by this observer</summary>
    private: ID3D11RasterizerStateNPtr direct3DRasterizerState;

  };

  // ------------------------------------------------------------------------------------------- //

}}} // namespace Nuclex::Graphics::Rasterization

#endif // NUCLEX_GRAPHICS_RASTERIZATION_DIRECT3D11POLYGONOPTIONSOBSERVER_H