GteDX11InputLayoutManager.h

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// David Eberly, Geometric Tools, Redmond WA 98052
// Copyright (c) 1998-2017
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
// File Version: 3.0.0 (2016/06/19)

#pragma once

#include <LowLevel/GteThreadSafeMap.h>
#include <Graphics/GteGEInputLayoutManager.h>
#include <Graphics/DX11/GteDX11InputLayout.h>

namespace gte
{

class GTE_IMPEXP DX11InputLayoutManager : public GEInputLayoutManager
{
public:
    // Construction and destruction.
    virtual ~DX11InputLayoutManager();
    DX11InputLayoutManager();

    // Management functions.  The Unbind(vbuffer) removes all pairs that
    // involve vbuffer.  The Unbind(vshader) removes all pairs that involve
    // vshader.
    DX11InputLayout* Bind(ID3D11Device* device, VertexBuffer const* vbuffer, Shader const* vshader);
    virtual bool Unbind(VertexBuffer const* vbuffer) override;
    virtual bool Unbind(Shader const* vshader) override;
    virtual void UnbindAll() override;
    virtual bool HasElements() const override;

private:
    typedef std::pair<VertexBuffer const*, Shader const*> VBSPair;

    class LayoutMap : public ThreadSafeMap<VBSPair, std::shared_ptr<DX11InputLayout>>
    {
    public:
        virtual ~LayoutMap();
        LayoutMap();

        void GatherMatch(VertexBuffer const* vbuffer, std::vector<VBSPair>& matches);
        void GatherMatch(Shader const* vshader, std::vector<VBSPair>& matches);
    };

    LayoutMap mMap;
};

}