//-----------------------------------------------------------------------------
// File: D3DEnumeration.cpp
//
// Desc: Enumerates D3D adapters, devices, modes, etc.
//-----------------------------------------------------------------------------
#define STRICT
#include <windows.h>
#include <D3D9.h>
#include "DXUtil.h"
#include "D3DEnumeration.h"


//-----------------------------------------------------------------------------
// Name: ColorChannelBits
// Desc: Returns the number of color channel bits in the specified D3DFORMAT
//-----------------------------------------------------------------------------
static UINT ColorChannelBits( D3DFORMAT fmt )
{
    switch( fmt )
    {
        case D3DFMT_R8G8B8:
            return 8;
        case D3DFMT_A8R8G8B8:
            return 8;
        case D3DFMT_X8R8G8B8:
            return 8;
        case D3DFMT_R5G6B5:
            return 5;
        case D3DFMT_X1R5G5B5:
            return 5;
        case D3DFMT_A1R5G5B5:
            return 5;
        case D3DFMT_A4R4G4B4:
            return 4;
        case D3DFMT_R3G3B2:
            return 2;
        case D3DFMT_A8R3G3B2:
            return 2;
        case D3DFMT_X4R4G4B4:
            return 4;
        case D3DFMT_A2B10G10R10:
            return 10;
        case D3DFMT_A2R10G10B10:
            return 10;
        default:
            return 0;
    }
}




//-----------------------------------------------------------------------------
// Name: AlphaChannelBits
// Desc: Returns the number of alpha channel bits in the specified D3DFORMAT
//-----------------------------------------------------------------------------
static UINT AlphaChannelBits( D3DFORMAT fmt )
{
    switch( fmt )
    {
        case D3DFMT_R8G8B8:
            return 0;
        case D3DFMT_A8R8G8B8:
            return 8;
        case D3DFMT_X8R8G8B8:
            return 0;
        case D3DFMT_R5G6B5:
            return 0;
        case D3DFMT_X1R5G5B5:
            return 0;
        case D3DFMT_A1R5G5B5:
            return 1;
        case D3DFMT_A4R4G4B4:
            return 4;
        case D3DFMT_R3G3B2:
            return 0;
        case D3DFMT_A8R3G3B2:
            return 8;
        case D3DFMT_X4R4G4B4:
            return 0;
        case D3DFMT_A2B10G10R10:
            return 2;
        case D3DFMT_A2R10G10B10:
            return 2;
        default:
            return 0;
    }
}




//-----------------------------------------------------------------------------
// Name: DepthBits
// Desc: Returns the number of depth bits in the specified D3DFORMAT
//-----------------------------------------------------------------------------
static UINT DepthBits( D3DFORMAT fmt )
{
    switch( fmt )
    {
        case D3DFMT_D16:
            return 16;
        case D3DFMT_D15S1:
            return 15;
        case D3DFMT_D24X8:
            return 24;
        case D3DFMT_D24S8:
            return 24;
        case D3DFMT_D24X4S4:
            return 24;
        case D3DFMT_D32:
            return 32;
        default:
            return 0;
    }
}




//-----------------------------------------------------------------------------
// Name: StencilBits
// Desc: Returns the number of stencil bits in the specified D3DFORMAT
//-----------------------------------------------------------------------------
static UINT StencilBits( D3DFORMAT fmt )
{
    switch( fmt )
    {
        case D3DFMT_D16:
            return 0;
        case D3DFMT_D15S1:
            return 1;
        case D3DFMT_D24X8:
            return 0;
        case D3DFMT_D24S8:
            return 8;
        case D3DFMT_D24X4S4:
            return 4;
        case D3DFMT_D32:
            return 0;
        default:
            return 0;
    }
}




//-----------------------------------------------------------------------------
// Name: D3DAdapterInfo destructor
// Desc: 
//-----------------------------------------------------------------------------
D3DAdapterInfo::~D3DAdapterInfo( void )
{
    if( pDisplayModeList != NULL )
        delete pDisplayModeList;
    if( pDeviceInfoList != NULL )
    {
        for( UINT idi = 0; idi < pDeviceInfoList->Count(); idi++ )
            delete (D3DDeviceInfo*)pDeviceInfoList->GetPtr(idi);
        delete pDeviceInfoList;
    }
}




//-----------------------------------------------------------------------------
// Name: D3DDeviceInfo destructor
// Desc: 
//-----------------------------------------------------------------------------
D3DDeviceInfo::~D3DDeviceInfo( void )
{
    if( pDeviceComboList != NULL )
    {
        for( UINT idc = 0; idc < pDeviceComboList->Count(); idc++ )
            delete (D3DDeviceCombo*)pDeviceComboList->GetPtr(idc);
        delete pDeviceComboList;
    }
}




//-----------------------------------------------------------------------------
// Name: D3DDeviceCombo destructor
// Desc: 
//-----------------------------------------------------------------------------
D3DDeviceCombo::~D3DDeviceCombo( void )
{
    if( pDepthStencilFormatList != NULL )
        delete pDepthStencilFormatList;
    if( pMultiSampleTypeList != NULL )
        delete pMultiSampleTypeList;
    if( pMultiSampleQualityList != NULL )
        delete pMultiSampleQualityList;
    if( pDSMSConflictList != NULL )
        delete pDSMSConflictList;
    if( pVertexProcessingTypeList != NULL )
        delete pVertexProcessingTypeList;
    if( pPresentIntervalList != NULL )
        delete pPresentIntervalList;
}



//-----------------------------------------------------------------------------
// Name: CD3DEnumeration constructor
// Desc: 
//-----------------------------------------------------------------------------
CD3DEnumeration::CD3DEnumeration()
{
    m_pAdapterInfoList = NULL;
    m_pAllowedAdapterFormatList = NULL;
    AppMinFullscreenWidth = 640;
    AppMinFullscreenHeight = 480;
    AppMinColorChannelBits = 5;
    AppMinAlphaChannelBits = 0;
    AppMinDepthBits = 15;
    AppMinStencilBits = 0;
    AppUsesDepthBuffer = false;
    AppUsesMixedVP = false;
    AppRequiresWindowed = false;
    AppRequiresFullscreen = false;
}




//-----------------------------------------------------------------------------
// Name: CD3DEnumeration destructor
// Desc: 
//-----------------------------------------------------------------------------
CD3DEnumeration::~CD3DEnumeration()
{
    if( m_pAdapterInfoList != NULL )
    {
        for( UINT iai = 0; iai < m_pAdapterInfoList->Count(); iai++ )
            delete (D3DAdapterInfo*)m_pAdapterInfoList->GetPtr(iai);
        delete m_pAdapterInfoList;
    }
    SAFE_DELETE( m_pAllowedAdapterFormatList );
}




//-----------------------------------------------------------------------------
// Name: SortModesCallback
// Desc: Used to sort D3DDISPLAYMODEs
//-----------------------------------------------------------------------------
static int __cdecl SortModesCallback( const void* arg1, const void* arg2 )
{
    D3DDISPLAYMODE* pdm1 = (D3DDISPLAYMODE*)arg1;
    D3DDISPLAYMODE* pdm2 = (D3DDISPLAYMODE*)arg2;

    if (pdm1->Width > pdm2->Width)
        return 1;
    if (pdm1->Width < pdm2->Width)
        return -1;
    if (pdm1->Height > pdm2->Height)
        return 1;
    if (pdm1->Height < pdm2->Height)
        return -1;
    if (pdm1->Format > pdm2->Format)
        return 1;
    if (pdm1->Format < pdm2->Format)
        return -1;
    if (pdm1->RefreshRate > pdm2->RefreshRate)
        return 1;
    if (pdm1->RefreshRate < pdm2->RefreshRate)
        return -1;
    return 0;
}




//-----------------------------------------------------------------------------
// Name: Enumerate
// Desc: Enumerates available D3D adapters, devices, modes, etc.
//-----------------------------------------------------------------------------
HRESULT CD3DEnumeration::Enumerate()
{
    HRESULT hr;
    CArrayList adapterFormatList( AL_VALUE, sizeof(D3DFORMAT) );

    if( m_pD3D == NULL )
        return E_FAIL;

    m_pAdapterInfoList = new CArrayList( AL_REFERENCE );
    if( m_pAdapterInfoList == NULL )
        return E_OUTOFMEMORY;

    m_pAllowedAdapterFormatList = new CArrayList( AL_VALUE, sizeof(D3DFORMAT) );
    if( m_pAllowedAdapterFormatList == NULL )
        return E_OUTOFMEMORY;
    D3DFORMAT fmt;
    if( FAILED( hr = m_pAllowedAdapterFormatList->Add( &( fmt = D3DFMT_X8R8G8B8 ) ) ) )
        return hr;
    if( FAILED( hr = m_pAllowedAdapterFormatList->Add( &( fmt = D3DFMT_X1R5G5B5 ) ) ) )
        return hr;
    if( FAILED( hr = m_pAllowedAdapterFormatList->Add( &( fmt = D3DFMT_R5G6B5 ) ) ) )
        return hr;
    if( FAILED( hr = m_pAllowedAdapterFormatList->Add( &( fmt = D3DFMT_A2R10G10B10 ) ) ) )
        return hr;

    D3DAdapterInfo* pAdapterInfo = NULL;
    UINT numAdapters = m_pD3D->GetAdapterCount();

    for (UINT adapterOrdinal = 0; adapterOrdinal < numAdapters; adapterOrdinal++)
    {
        pAdapterInfo = new D3DAdapterInfo;
        if( pAdapterInfo == NULL )
            return E_OUTOFMEMORY;
        pAdapterInfo->pDisplayModeList = new CArrayList( AL_VALUE, sizeof(D3DDISPLAYMODE)); 
        pAdapterInfo->pDeviceInfoList = new CArrayList( AL_REFERENCE );
        if( pAdapterInfo->pDisplayModeList == NULL ||
            pAdapterInfo->pDeviceInfoList == NULL )
        {
            delete pAdapterInfo;
            return E_OUTOFMEMORY;
        }
        pAdapterInfo->AdapterOrdinal = adapterOrdinal;
        m_pD3D->GetAdapterIdentifier(adapterOrdinal, 0, &pAdapterInfo->AdapterIdentifier);

        // Get list of all display modes on this adapter.  
        // Also build a temporary list of all display adapter formats.
        adapterFormatList.Clear();
        for( UINT iaaf = 0; iaaf < m_pAllowedAdapterFormatList->Count(); iaaf++ )
        {
            D3DFORMAT allowedAdapterFormat = *(D3DFORMAT*)m_pAllowedAdapterFormatList->GetPtr( iaaf );
            UINT numAdapterModes = m_pD3D->GetAdapterModeCount( adapterOrdinal, allowedAdapterFormat );
            for (UINT mode = 0; mode < numAdapterModes; mode++)
            {
                D3DDISPLAYMODE displayMode;
                m_pD3D->EnumAdapterModes( adapterOrdinal, allowedAdapterFormat, mode, &displayMode );
                if( displayMode.Width < AppMinFullscreenWidth ||
                    displayMode.Height < AppMinFullscreenHeight ||
                    ColorChannelBits(displayMode.Format) < AppMinColorChannelBits )
                {
                    continue;
                }
                pAdapterInfo->pDisplayModeList->Add(&displayMode);
                if( !adapterFormatList.Contains( &displayMode.Format ) )
                    adapterFormatList.Add( &displayMode.Format );
            }
        }

        // Sort displaymode list
        qsort( pAdapterInfo->pDisplayModeList->GetPtr(0), 
            pAdapterInfo->pDisplayModeList->Count(), sizeof( D3DDISPLAYMODE ),
            SortModesCallback );

        // Get info for each device on this adapter
        if( FAILED( hr = EnumerateDevices( pAdapterInfo, &adapterFormatList ) ) )
        {
            delete pAdapterInfo;
            return hr;
        }

        // If at least one device on this adapter is available and compatible
        // with the app, add the adapterInfo to the list
        if (pAdapterInfo->pDeviceInfoList->Count() == 0)
            delete pAdapterInfo;
        else
            m_pAdapterInfoList->Add(pAdapterInfo);
    }
    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: EnumerateDevices
// Desc: Enumerates D3D devices for a particular adapter.
//-----------------------------------------------------------------------------
HRESULT CD3DEnumeration::EnumerateDevices( D3DAdapterInfo* pAdapterInfo, 
                                           CArrayList* pAdapterFormatList )
{
    const D3DDEVTYPE devTypeArray[] = { D3DDEVTYPE_HAL, D3DDEVTYPE_SW, D3DDEVTYPE_REF };
    const UINT devTypeArrayCount = sizeof(devTypeArray) / sizeof(devTypeArray[0]);
    HRESULT hr;

    D3DDeviceInfo* pDeviceInfo = NULL;
    for( UINT idt = 0; idt < devTypeArrayCount; idt++ )
    {
        pDeviceInfo = new D3DDeviceInfo;
        if( pDeviceInfo == NULL )
            return E_OUTOFMEMORY;
        pDeviceInfo->pDeviceComboList = new CArrayList( AL_REFERENCE ); 
        if( pDeviceInfo->pDeviceComboList == NULL )
        {
            delete pDeviceInfo;
            return E_OUTOFMEMORY;
        }
        pDeviceInfo->AdapterOrdinal = pAdapterInfo->AdapterOrdinal;
        pDeviceInfo->DevType = devTypeArray[idt];
        if( FAILED( m_pD3D->GetDeviceCaps( pAdapterInfo->AdapterOrdinal, 
            pDeviceInfo->DevType, &pDeviceInfo->Caps ) ) )
        {
            delete pDeviceInfo;
            continue;
        }

        // Get info for each devicecombo on this device
        if( FAILED( hr = EnumerateDeviceCombos(pDeviceInfo, pAdapterFormatList) ) )
        {
            delete pDeviceInfo;
            return hr;
        }

        // If at least one devicecombo for this device is found, 
        // add the deviceInfo to the list
        if (pDeviceInfo->pDeviceComboList->Count() == 0)
        {
            delete pDeviceInfo;
            continue;
        }
        pAdapterInfo->pDeviceInfoList->Add(pDeviceInfo);
    }
    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: EnumerateDeviceCombos
// Desc: Enumerates DeviceCombos for a particular device.
//-----------------------------------------------------------------------------
HRESULT CD3DEnumeration::EnumerateDeviceCombos( D3DDeviceInfo* pDeviceInfo, 
                                               CArrayList* pAdapterFormatList )
{
    const D3DFORMAT backBufferFormatArray[] = 
        {   D3DFMT_A8R8G8B8, D3DFMT_X8R8G8B8, D3DFMT_A2R10G10B10, 
            D3DFMT_R5G6B5, D3DFMT_A1R5G5B5, D3DFMT_X1R5G5B5 };
    const UINT backBufferFormatArrayCount = sizeof(backBufferFormatArray) / sizeof(backBufferFormatArray[0]);
    bool isWindowedArray[] = { false, true };

    // See which adapter formats are supported by this device
    D3DFORMAT adapterFormat;
    for( UINT iaf = 0; iaf < pAdapterFormatList->Count(); iaf++ )
    {
        adapterFormat = *(D3DFORMAT*)pAdapterFormatList->GetPtr(iaf);
        D3DFORMAT backBufferFormat;
        for( UINT ibbf = 0; ibbf < backBufferFormatArrayCount; ibbf++ )
        {
            backBufferFormat = backBufferFormatArray[ibbf];
            if (AlphaChannelBits(backBufferFormat) < AppMinAlphaChannelBits)
                continue;
            bool isWindowed;
            for( UINT iiw = 0; iiw < 2; iiw++)
            {
                isWindowed = isWindowedArray[iiw];
                if (!isWindowed && AppRequiresWindowed)
                    continue;
                if (isWindowed && AppRequiresFullscreen)
                    continue;
                if (FAILED(m_pD3D->CheckDeviceType(pDeviceInfo->AdapterOrdinal, pDeviceInfo->DevType, 
                    adapterFormat, backBufferFormat, isWindowed)))
                {
                    continue;
                }
                // At this point, we have an adapter/device/adapterformat/backbufferformat/iswindowed
                // DeviceCombo that is supported by the system.  We still need to confirm that it's 
                // compatible with the app, and find one or more suitable depth/stencil buffer format,
                // multisample type, vertex processing type, and present interval.
                D3DDeviceCombo* pDeviceCombo = NULL;
                pDeviceCombo = new D3DDeviceCombo;
                if( pDeviceCombo == NULL )
                    return E_OUTOFMEMORY;
                pDeviceCombo->pDepthStencilFormatList = new CArrayList( AL_VALUE, sizeof( D3DFORMAT ) );
                pDeviceCombo->pMultiSampleTypeList = new CArrayList( AL_VALUE, sizeof( D3DMULTISAMPLE_TYPE ) );
                pDeviceCombo->pMultiSampleQualityList = new CArrayList( AL_VALUE, sizeof( DWORD ) );
                pDeviceCombo->pDSMSConflictList = new CArrayList( AL_VALUE, sizeof( D3DDSMSConflict ) );
                pDeviceCombo->pVertexProcessingTypeList = new CArrayList( AL_VALUE, sizeof( VertexProcessingType ) );
                pDeviceCombo->pPresentIntervalList = new CArrayList( AL_VALUE, sizeof( UINT ) );
                if( pDeviceCombo->pDepthStencilFormatList == NULL ||
                    pDeviceCombo->pMultiSampleTypeList == NULL || 
                    pDeviceCombo->pMultiSampleQualityList == NULL || 
                    pDeviceCombo->pDSMSConflictList == NULL || 
                    pDeviceCombo->pVertexProcessingTypeList == NULL ||
                    pDeviceCombo->pPresentIntervalList == NULL )
                {
                    delete pDeviceCombo;
                    return E_OUTOFMEMORY;
                }
                pDeviceCombo->AdapterOrdinal = pDeviceInfo->AdapterOrdinal;
                pDeviceCombo->DevType = pDeviceInfo->DevType;
                pDeviceCombo->AdapterFormat = adapterFormat;
                pDeviceCombo->BackBufferFormat = backBufferFormat;
                pDeviceCombo->IsWindowed = isWindowed;
                if (AppUsesDepthBuffer)
                {
                    BuildDepthStencilFormatList(pDeviceCombo);
                    if (pDeviceCombo->pDepthStencilFormatList->Count() == 0)
                    {
                        delete pDeviceCombo;
                        continue;
                    }
                }
                BuildMultiSampleTypeList(pDeviceCombo);
                if (pDeviceCombo->pMultiSampleTypeList->Count() == 0)
                {
                    delete pDeviceCombo;
                    continue;
                }
                BuildDSMSConflictList(pDeviceCombo);
                BuildVertexProcessingTypeList(pDeviceInfo, pDeviceCombo);
                if (pDeviceCombo->pVertexProcessingTypeList->Count() == 0)
                {
                    delete pDeviceCombo;
                    continue;
                }
                BuildPresentIntervalList(pDeviceInfo, pDeviceCombo);

                pDeviceInfo->pDeviceComboList->Add(pDeviceCombo);
            }
        }
    }

    return S_OK;
}




//-----------------------------------------------------------------------------
// Name: BuildDepthStencilFormatList
// Desc: Adds all depth/stencil formats that are compatible with the device 
//       and app to the given D3DDeviceCombo.
//-----------------------------------------------------------------------------
void CD3DEnumeration::BuildDepthStencilFormatList( D3DDeviceCombo* pDeviceCombo )
{
    const D3DFORMAT depthStencilFormatArray[] = 
    {
        D3DFMT_D16,
        D3DFMT_D15S1,
        D3DFMT_D24X8,
        D3DFMT_D24S8,
        D3DFMT_D24X4S4,
        D3DFMT_D32,
    };
    const UINT depthStencilFormatArrayCount = sizeof(depthStencilFormatArray) / 
                                              sizeof(depthStencilFormatArray[0]);

    D3DFORMAT depthStencilFmt;
    for( UINT idsf = 0; idsf < depthStencilFormatArrayCount; idsf++ )
    {
        depthStencilFmt = depthStencilFormatArray[idsf];
        if (DepthBits(depthStencilFmt) < AppMinDepthBits)
            continue;
        if (StencilBits(depthStencilFmt) < AppMinStencilBits)
            continue;
        if (SUCCEEDED(m_pD3D->CheckDeviceFormat(pDeviceCombo->AdapterOrdinal, 
            pDeviceCombo->DevType, pDeviceCombo->AdapterFormat, 
            D3DUSAGE_DEPTHSTENCIL, D3DRTYPE_SURFACE, depthStencilFmt)))
        {
            if (SUCCEEDED(m_pD3D->CheckDepthStencilMatch(pDeviceCombo->AdapterOrdinal, 
                pDeviceCombo->DevType, pDeviceCombo->AdapterFormat, 
                pDeviceCombo->BackBufferFormat, depthStencilFmt)))
            {
                pDeviceCombo->pDepthStencilFormatList->Add(&depthStencilFmt);
            }
        }
    }
}




//-----------------------------------------------------------------------------
// Name: BuildMultiSampleTypeList
// Desc: Adds all multisample types that are compatible with the device and app to
//       the given D3DDeviceCombo.
//-----------------------------------------------------------------------------
void CD3DEnumeration::BuildMultiSampleTypeList( D3DDeviceCombo* pDeviceCombo )
{
    const D3DMULTISAMPLE_TYPE msTypeArray[] = { 
        D3DMULTISAMPLE_NONE,
        D3DMULTISAMPLE_NONMASKABLE,
        D3DMULTISAMPLE_2_SAMPLES,
        D3DMULTISAMPLE_3_SAMPLES,
        D3DMULTISAMPLE_4_SAMPLES,
        D3DMULTISAMPLE_5_SAMPLES,
        D3DMULTISAMPLE_6_SAMPLES,
        D3DMULTISAMPLE_7_SAMPLES,
        D3DMULTISAMPLE_8_SAMPLES,
        D3DMULTISAMPLE_9_SAMPLES,
        D3DMULTISAMPLE_10_SAMPLES,
        D3DMULTISAMPLE_11_SAMPLES,
        D3DMULTISAMPLE_12_SAMPLES,
        D3DMULTISAMPLE_13_SAMPLES,
        D3DMULTISAMPLE_14_SAMPLES,
        D3DMULTISAMPLE_15_SAMPLES,
        D3DMULTISAMPLE_16_SAMPLES,
    };
    const UINT msTypeArrayCount = sizeof(msTypeArray) / sizeof(msTypeArray[0]);

    D3DMULTISAMPLE_TYPE msType;
    DWORD msQuality;
    for( UINT imst = 0; imst < msTypeArrayCount; imst++ )
    {
        msType = msTypeArray[imst];
        if (SUCCEEDED(m_pD3D->CheckDeviceMultiSampleType(pDeviceCombo->AdapterOrdinal, pDeviceCombo->DevType, 
            pDeviceCombo->BackBufferFormat, pDeviceCombo->IsWindowed, msType, &msQuality)))
        {
            pDeviceCombo->pMultiSampleTypeList->Add(&msType);
            pDeviceCombo->pMultiSampleQualityList->Add( &msQuality );
        }
    }
}




//-----------------------------------------------------------------------------
// Name: BuildDSMSConflictList
// Desc: Find any conflicts between the available depth/stencil formats and
//       multisample types.
//-----------------------------------------------------------------------------
void CD3DEnumeration::BuildDSMSConflictList( D3DDeviceCombo* pDeviceCombo )
{
    D3DDSMSConflict DSMSConflict;

    for( UINT ids = 0; ids < pDeviceCombo->pDepthStencilFormatList->Count(); ids++ )
    {
        D3DFORMAT dsFmt = *(D3DFORMAT*)pDeviceCombo->pDepthStencilFormatList->GetPtr(ids);
        for( UINT ims = 0; ims < pDeviceCombo->pMultiSampleTypeList->Count(); ims++ )
        {
            D3DMULTISAMPLE_TYPE msType = *(D3DMULTISAMPLE_TYPE*)pDeviceCombo->pMultiSampleTypeList->GetPtr(ims);
            if( FAILED( m_pD3D->CheckDeviceMultiSampleType( pDeviceCombo->AdapterOrdinal, pDeviceCombo->DevType,
                dsFmt, pDeviceCombo->IsWindowed, msType, NULL ) ) )
            {
                DSMSConflict.DSFormat = dsFmt;
                DSMSConflict.MSType = msType;
                pDeviceCombo->pDSMSConflictList->Add( &DSMSConflict );
            }
        }
    }
}




//-----------------------------------------------------------------------------
// Name: BuildVertexProcessingTypeList
// Desc: Adds all vertex processing types that are compatible with the device 
//       and app to the given D3DDeviceCombo.
//-----------------------------------------------------------------------------
void CD3DEnumeration::BuildVertexProcessingTypeList( D3DDeviceInfo* pDeviceInfo, 
                                                     D3DDeviceCombo* pDeviceCombo )
{
    VertexProcessingType vpt;
    if ((pDeviceInfo->Caps.DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT) != 0)
    {
        if ((pDeviceInfo->Caps.DevCaps & D3DDEVCAPS_PUREDEVICE) != 0)
        {
            if (ConfirmDeviceCallback == NULL ||
                ConfirmDeviceCallback(&pDeviceInfo->Caps, PURE_HARDWARE_VP, pDeviceCombo->BackBufferFormat))
            {
                vpt = PURE_HARDWARE_VP;
                pDeviceCombo->pVertexProcessingTypeList->Add(&vpt);
            }
        }
        if (ConfirmDeviceCallback == NULL ||
            ConfirmDeviceCallback(&pDeviceInfo->Caps, HARDWARE_VP, pDeviceCombo->BackBufferFormat))
        {
            vpt = HARDWARE_VP;
            pDeviceCombo->pVertexProcessingTypeList->Add(&vpt);
        }
        if (AppUsesMixedVP && (ConfirmDeviceCallback == NULL ||
            ConfirmDeviceCallback(&pDeviceInfo->Caps, MIXED_VP, pDeviceCombo->BackBufferFormat)))
        {
            vpt = MIXED_VP;
            pDeviceCombo->pVertexProcessingTypeList->Add(&vpt);
        }
    }
    if (ConfirmDeviceCallback == NULL ||
        ConfirmDeviceCallback(&pDeviceInfo->Caps, SOFTWARE_VP, pDeviceCombo->BackBufferFormat))
    {
        vpt = SOFTWARE_VP;
        pDeviceCombo->pVertexProcessingTypeList->Add(&vpt);
    }
}




//-----------------------------------------------------------------------------
// Name: BuildPresentIntervalList
// Desc: Adds all present intervals that are compatible with the device and app 
//       to the given D3DDeviceCombo.
//-----------------------------------------------------------------------------
void CD3DEnumeration::BuildPresentIntervalList( D3DDeviceInfo* pDeviceInfo, 
                                                D3DDeviceCombo* pDeviceCombo )
{
    const UINT piArray[] = { 
        D3DPRESENT_INTERVAL_IMMEDIATE,
        D3DPRESENT_INTERVAL_DEFAULT,
        D3DPRESENT_INTERVAL_ONE,
        D3DPRESENT_INTERVAL_TWO,
        D3DPRESENT_INTERVAL_THREE,
        D3DPRESENT_INTERVAL_FOUR,
    };
    const UINT piArrayCount = sizeof(piArray) / sizeof(piArray[0]);

    UINT pi;
    for( UINT ipi = 0; ipi < piArrayCount; ipi++ )
    {
        pi = piArray[ipi];
        if( pDeviceCombo->IsWindowed )
        {
            if( pi == D3DPRESENT_INTERVAL_TWO ||
                pi == D3DPRESENT_INTERVAL_THREE ||
                pi == D3DPRESENT_INTERVAL_FOUR )
            {
                // These intervals are not supported in windowed mode.
                continue;
            }
        }
        // Note that D3DPRESENT_INTERVAL_DEFAULT is zero, so you
        // can't do a caps check for it -- it is always available.
        if( pi == D3DPRESENT_INTERVAL_DEFAULT ||
            (pDeviceInfo->Caps.PresentationIntervals & pi) )
        {
            pDeviceCombo->pPresentIntervalList->Add( &pi );
        }
    }
}