/**************************************************************************
 *
 * Copyright 2012 Jose Fonseca
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
 * AUTHORS,
 * AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 **************************************************************************/


/*
 * Auxiliary functions to compute the size of array/blob arguments.
 */

#pragma once


/* We purposedly don't include any D3D header, so that this header can be used
 * with all D3D versions. */

#include <assert.h>

#include <algorithm>

#include "dxgisize.hpp"
#include "com_ptr.hpp"


inline UINT
_getNumMipLevels(const D3D11_BUFFER_DESC *pDesc) {
    return 1;
}

inline UINT
_getNumMipLevels(const D3D11_TEXTURE1D_DESC *pDesc) {
    return pDesc->MipLevels != 0 ? pDesc->MipLevels : _getNumMipLevels(pDesc->Width);
}

inline UINT
_getNumMipLevels(const D3D11_TEXTURE2D_DESC *pDesc) {
    return pDesc->MipLevels != 0 ? pDesc->MipLevels : _getNumMipLevels(pDesc->Width, pDesc->Height);
}

inline UINT
_getNumMipLevels(const D3D11_TEXTURE2D_DESC1 *pDesc) {
    return pDesc->MipLevels != 0 ? pDesc->MipLevels : _getNumMipLevels(pDesc->Width, pDesc->Height);
}

inline UINT
_getNumMipLevels(const D3D11_TEXTURE3D_DESC *pDesc) {
    return pDesc->MipLevels != 0 ? pDesc->MipLevels : _getNumMipLevels(pDesc->Width, pDesc->Height, pDesc->Depth);
}

inline UINT
_getNumMipLevels(const D3D11_TEXTURE3D_DESC1 *pDesc) {
    return pDesc->MipLevels != 0 ? pDesc->MipLevels : _getNumMipLevels(pDesc->Width, pDesc->Height, pDesc->Depth);
}

inline UINT
_getNumSubResources(const D3D11_BUFFER_DESC *pDesc) {
    return 1;
}

inline UINT
_getNumSubResources(const D3D11_TEXTURE1D_DESC *pDesc) {
    return _getNumMipLevels(pDesc) * pDesc->ArraySize;
}

inline UINT
_getNumSubResources(const D3D11_TEXTURE2D_DESC *pDesc) {
    return _getNumMipLevels(pDesc) * pDesc->ArraySize;
}

inline UINT
_getNumSubResources(const D3D11_TEXTURE2D_DESC1 *pDesc) {
    return _getNumMipLevels(pDesc) * pDesc->ArraySize;
}

inline UINT
_getNumSubResources(const D3D11_TEXTURE3D_DESC *pDesc) {
    return _getNumMipLevels(pDesc);
}

inline UINT
_getNumSubResources(const D3D11_TEXTURE3D_DESC1 *pDesc) {
    return _getNumMipLevels(pDesc);
}

static inline size_t
_calcSubresourceSize(const D3D11_BUFFER_DESC *pDesc, UINT Subresource, UINT RowPitch = 0, UINT SlicePitch = 0) {
    return pDesc->ByteWidth;
}

static inline size_t
_calcSubresourceSize(const D3D11_TEXTURE1D_DESC *pDesc, UINT Subresource, UINT RowPitch = 0, UINT SlicePitch = 0) {
    UINT MipLevel = Subresource % _getNumMipLevels(pDesc);
    return _calcMipDataSize(MipLevel, pDesc->Format, pDesc->Width, 1, RowPitch, 1, SlicePitch);
}

static inline size_t
_calcSubresourceSize(const D3D11_TEXTURE2D_DESC *pDesc, UINT Subresource, UINT RowPitch, UINT SlicePitch = 0) {
    UINT MipLevel = Subresource % _getNumMipLevels(pDesc);
    return _calcMipDataSize(MipLevel, pDesc->Format, pDesc->Width, pDesc->Height, RowPitch, 1, SlicePitch);
}

static inline size_t
_calcSubresourceSize(const D3D11_TEXTURE2D_DESC1 *pDesc, UINT Subresource, UINT RowPitch, UINT SlicePitch = 0) {
    UINT MipLevel = Subresource % _getNumMipLevels(pDesc);
    return _calcMipDataSize(MipLevel, pDesc->Format, pDesc->Width, pDesc->Height, RowPitch, 1, SlicePitch);
}

static inline size_t
_calcSubresourceSize(const D3D11_TEXTURE3D_DESC *pDesc, UINT Subresource, UINT RowPitch, UINT SlicePitch) {
    UINT MipLevel = Subresource;
    return _calcMipDataSize(MipLevel, pDesc->Format, pDesc->Width, pDesc->Height, RowPitch, pDesc->Depth, SlicePitch);
}

static inline size_t
_calcSubresourceSize(const D3D11_TEXTURE3D_DESC1 *pDesc, UINT Subresource, UINT RowPitch, UINT SlicePitch) {
    UINT MipLevel = Subresource;
    return _calcMipDataSize(MipLevel, pDesc->Format, pDesc->Width, pDesc->Height, RowPitch, pDesc->Depth, SlicePitch);
}

static inline size_t
_calcSubresourceSize(ID3D11Resource *pDstResource, UINT DstSubresource, const D3D11_BOX *pDstBox, UINT SrcRowPitch, UINT SrcDepthPitch) {
    if (pDstBox &&
        (pDstBox->left  >= pDstBox->right ||
         pDstBox->top   >= pDstBox->bottom ||
         pDstBox->front >= pDstBox->back)) {
        return 0;
    }

    D3D11_RESOURCE_DIMENSION Type = D3D11_RESOURCE_DIMENSION_UNKNOWN;
    pDstResource->GetType(&Type);

    DXGI_FORMAT Format;
    UINT Width;
    UINT Height = 1;
    UINT Depth = 1;
    UINT MipLevels = 1;

    switch (Type) {
    case D3D11_RESOURCE_DIMENSION_BUFFER:
        if (pDstBox) {
            return pDstBox->right - pDstBox->left;
        } else {
            D3D11_BUFFER_DESC Desc;
            static_cast<ID3D11Buffer *>(pDstResource)->GetDesc(&Desc);
            return Desc.ByteWidth;
        }
    case D3D11_RESOURCE_DIMENSION_TEXTURE1D:
        {
            D3D11_TEXTURE1D_DESC Desc;
            static_cast<ID3D11Texture1D *>(pDstResource)->GetDesc(&Desc);
            Format = Desc.Format;
            Width = Desc.Width;
            MipLevels = Desc.MipLevels;
        }
        break;
    case D3D11_RESOURCE_DIMENSION_TEXTURE2D:
        {
            D3D11_TEXTURE2D_DESC Desc;
            static_cast<ID3D11Texture2D *>(pDstResource)->GetDesc(&Desc);
            Format = Desc.Format;
            Width = Desc.Width;
            Height = Desc.Height;
            MipLevels = Desc.MipLevels;
        }
        break;
    case D3D11_RESOURCE_DIMENSION_TEXTURE3D:
        {
            D3D11_TEXTURE3D_DESC Desc;
            static_cast<ID3D11Texture3D *>(pDstResource)->GetDesc(&Desc);
            Format = Desc.Format;
            Width = Desc.Width;
            Height = Desc.Height;
            Depth = Desc.Depth;
            MipLevels = Desc.MipLevels;
        }
        break;
    case D3D11_RESOURCE_DIMENSION_UNKNOWN:
    default:
        assert(0);
        return 0;
    }

    if (pDstBox) {
        Width  = pDstBox->right  - pDstBox->left;
        Height = pDstBox->bottom - pDstBox->top;
        Depth  = pDstBox->back   - pDstBox->front;
    } else {
        assert(Width  > 0);
        assert(Height > 0);
        assert(Depth  > 0);
        UINT MipLevel = DstSubresource % MipLevels;
        Width  = std::max(Width  >> MipLevel, UINT(1));
        Height = std::max(Height >> MipLevel, UINT(1));
        Depth  = std::max(Depth  >> MipLevel, UINT(1));
    }

    return _calcDataSize(Format, Width, Height, SrcRowPitch, Depth, SrcDepthPitch);
}


static inline void
_getMapDesc(ID3D11DeviceContext* pContext, ID3D11Resource * pResource, UINT Subresource, D3D11_MAP MapType, UINT MapFlags, D3D11_MAPPED_SUBRESOURCE * pMappedResource,
            _MAP_DESC & MapDesc) {
    MapDesc.pData = 0;
    MapDesc.Size = 0;

    if (MapType == D3D11_MAP_READ) {
        return;
    }

    MapDesc.pData = pMappedResource->pData;
    MapDesc.Size = _calcSubresourceSize(pResource, Subresource, NULL, pMappedResource->RowPitch, pMappedResource->DepthPitch);
}


static inline void
_normalizeMap(ID3D11Resource * pResource, D3D11_MAPPED_SUBRESOURCE * pMappedResource)
{
    D3D11_RESOURCE_DIMENSION Type = D3D11_RESOURCE_DIMENSION_UNKNOWN;
    pResource->GetType(&Type);

    switch (Type) {
    default:
    case D3D11_RESOURCE_DIMENSION_UNKNOWN:
        assert(0);
        /* fall-through */
    case D3D11_RESOURCE_DIMENSION_BUFFER:
    case D3D11_RESOURCE_DIMENSION_TEXTURE1D:
        pMappedResource->RowPitch = 0;
        /* fall-through */
    case D3D11_RESOURCE_DIMENSION_TEXTURE2D:
        pMappedResource->DepthPitch = 0;
        break;
    case D3D11_RESOURCE_DIMENSION_TEXTURE3D:
        break;
    }
}


static inline D3D11_QUERY
_getQueryType(ID3D11Query *pQuery)
{
    D3D11_QUERY_DESC Desc;
    pQuery->GetDesc(&Desc);
    return Desc.Query;
}


static inline D3D11_QUERY
_getQueryType(ID3D11Asynchronous *pAsync)
{
    com_ptr<ID3D11Query> pQuery;
    HRESULT hr;
    hr = pAsync->QueryInterface(IID_ID3D11Query, (void **)&pQuery);
    if (FAILED(hr)) {
        return (D3D11_QUERY)-1;
    }
    return _getQueryType(pQuery);
}


