#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_DIRECT3D11SAMPLEROPTIONSOBSERVER_H
#define NUCLEX_GRAPHICS_RASTERIZATION_DIRECT3D11SAMPLEROPTIONSOBSERVER_H

#include "Nuclex/Graphics/Config.h"
#include "Nuclex/Graphics/Rasterization/SamplerOptions.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 Direct3D11SamplerOptionsObserver : public SamplerOptions::Observer {

    /// <summary>Initializes a new Direct3D 11 rasterizer state</summary>
    /// <param name="resources">Manager the index buffer belongs to</param>
    /// <param name="samplerOptions">Sampler options the observer is attached to</param>
    public: Direct3D11SamplerOptionsObserver(
      Direct3D11RasterizerResources &resources, SamplerOptions *samplerOptions
    );

    /// <summary>Frees all resources owned by the sampler options observer</summary>
    public: virtual ~Direct3D11SamplerOptionsObserver();

    /// <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 sampler options being observed</summary>
    /// <returns>The agnostic sampler options being observed</returns>
    public: SamplerOptions *GetResource() const { return this->samplerOptions; }

    /// <summary>Retrieves the Direct3D sampler state the observer is managing</summary>
    /// <returns>The observer's Direct3D sampler state</returns>
    public: const ID3D11SamplerStatePtr &GetDirect3DRasterizerState() const {
      return this->direct3DSamplerState;
    }

    /// <summary>
    ///   Creates a Direct3D sampler state matching the observed sampler options
    /// </summary>
    private: void createDirect3DSamplerState();

    private: Direct3D11SamplerOptionsObserver(const Direct3D11SamplerOptionsObserver &);
    private: Direct3D11SamplerOptionsObserver &operator =(
      const Direct3D11SamplerOptionsObserver &
    );

    /// <summary>Resource manager the sampler options observer belongs to</summary>
    private: Direct3D11RasterizerResources &resources;
    /// <summary>Sampler options this observer is attached to</summary>
    private: SamplerOptions *samplerOptions;
    /// <summary>Sampler state managed by this observer</summary>
    private: ID3D11SamplerStatePtr direct3DSamplerState;

  };

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

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

#endif // NUCLEX_GRAPHICS_RASTERIZATION_DIRECT3D11SAMPLEROPTIONSOBSERVER_H