/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/
// Original file Copyright Crytek GMBH or its affiliates, used under license.
#include "StdAfx.h"
#include "CCryDX12DepthStencilView.hpp"

#include "DX12/Device/CCryDX12Device.hpp"

#include "DX12/Resource/Misc/CCryDX12Buffer.hpp"

#include "DX12/Resource/Texture/CCryDX12Texture1D.hpp"
#include "DX12/Resource/Texture/CCryDX12Texture2D.hpp"

CCryDX12DepthStencilView* CCryDX12DepthStencilView::Create(CCryDX12Device* pDevice, ID3D11Resource* pResource, const D3D11_DEPTH_STENCIL_VIEW_DESC* pDesc)
{
    ID3D12Resource* pResource12 = DX12_EXTRACT_D3D12RESOURCE(pResource);
    D3D11_DEPTH_STENCIL_VIEW_DESC desc11 = pDesc ? *pDesc : D3D11_DEPTH_STENCIL_VIEW_DESC();
    D3D12_DEPTH_STENCIL_VIEW_DESC desc12;
    ZeroMemory(&desc12, sizeof(D3D12_DEPTH_STENCIL_VIEW_DESC));

    if (pDesc)
    {
        desc12.Format = pDesc->Format;
        desc12.ViewDimension = static_cast<D3D12_DSV_DIMENSION>(pDesc->ViewDimension);

        desc12.Flags |= (desc11.Flags & D3D11_DSV_READ_ONLY_DEPTH   ? D3D12_DSV_FLAG_READ_ONLY_DEPTH   : D3D12_DSV_FLAG_NONE);
        desc12.Flags |= (desc11.Flags & D3D11_DSV_READ_ONLY_STENCIL ? D3D12_DSV_FLAG_READ_ONLY_STENCIL : D3D12_DSV_FLAG_NONE);

        switch (desc12.ViewDimension)
        {
        case D3D12_DSV_DIMENSION_TEXTURE1DARRAY:
            desc12.Texture1DArray.ArraySize         = pDesc->Texture1DArray.ArraySize;
            desc12.Texture1DArray.FirstArraySlice   = pDesc->Texture1DArray.FirstArraySlice;
            desc12.Texture1DArray.MipSlice          = pDesc->Texture1DArray.MipSlice;
            break;
        case D3D12_DSV_DIMENSION_TEXTURE2DARRAY:
            desc12.Texture2DArray.ArraySize         = pDesc->Texture2DArray.ArraySize;
            desc12.Texture2DArray.FirstArraySlice   = pDesc->Texture2DArray.FirstArraySlice;
            desc12.Texture2DArray.MipSlice          = pDesc->Texture2DArray.MipSlice;
            break;
        case D3D12_DSV_DIMENSION_TEXTURE2DMS:
            break;
        case D3D12_DSV_DIMENSION_TEXTURE2DMSARRAY:
            desc12.Texture2DMSArray.FirstArraySlice = pDesc->Texture2DMSArray.FirstArraySlice;
            desc12.Texture2DMSArray.ArraySize       = pDesc->Texture2DMSArray.ArraySize;
            break;
        case D3D12_DSV_DIMENSION_TEXTURE1D:
            desc12.Texture1D.MipSlice               = pDesc->Texture1D.MipSlice;
            break;
        case D3D12_DSV_DIMENSION_TEXTURE2D:
            desc12.Texture2D.MipSlice               = pDesc->Texture2D.MipSlice;
            break;
        }
    }
    else
    {
        EDX12ResourceType type = DX12_EXTRACT_RESOURCE_TYPE(pResource);

        switch (type)
        {
        case eDX12RT_Texture1D:
        {
            D3D11_TEXTURE1D_DESC desc;
            (reinterpret_cast<CCryDX12Texture1D*>(pResource))->GetDesc(&desc);

            desc11.Format = desc.Format;
            desc11.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE1D;

            desc12.Format = desc.Format;
            desc12.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE1D;
        }
        break;

        case eDX12RT_Texture2D:
        {
            D3D11_TEXTURE2D_DESC desc;
            (reinterpret_cast<CCryDX12Texture2D*>(pResource))->GetDesc(&desc);

            desc11.Format = desc.Format;
            desc11.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2D;

            desc12.Format = desc.Format;
            desc12.ViewDimension = D3D12_DSV_DIMENSION_TEXTURE2D;
        }
        break;

        default:
            DX12_NOT_IMPLEMENTED;
            return NULL;
        }
    }

    CCryDX12DepthStencilView* result = NULL;

    if (pDesc)
    {
        result = DX12::PassAddRef(new CCryDX12DepthStencilView(pResource, desc11, pResource12, desc12));
    }
    else
    {
        result = DX12::PassAddRef(new CCryDX12DepthStencilView(pResource, desc11, pResource12));
    }

    return result;
}

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

CCryDX12DepthStencilView::CCryDX12DepthStencilView(ID3D11Resource* pResource11, const D3D11_DEPTH_STENCIL_VIEW_DESC& rDesc11, ID3D12Resource* pResource12, const D3D12_DEPTH_STENCIL_VIEW_DESC& rDesc12)
    : Super(pResource11, DX12::EVT_DepthStencilView)
    , m_Desc11(rDesc11)
{
    m_DX12View.GetDSVDesc() = rDesc12;
}

CCryDX12DepthStencilView::CCryDX12DepthStencilView(ID3D11Resource* pResource11, const D3D11_DEPTH_STENCIL_VIEW_DESC& rDesc11, ID3D12Resource* pResource12)
    : Super(pResource11, DX12::EVT_DepthStencilView)
    , m_Desc11(rDesc11)
{
    m_DX12View.HasDesc(false);
}

CCryDX12DepthStencilView::~CCryDX12DepthStencilView()
{
}

#pragma region /* ID3D11DepthStencilView implementation */

void STDMETHODCALLTYPE CCryDX12DepthStencilView::GetDesc(
    _Out_  D3D11_DEPTH_STENCIL_VIEW_DESC* pDesc)
{
    if (pDesc)
    {
        *pDesc = m_Desc11;
    }
}

#pragma endregion