dxutmisc.cpp

声音和图片的加载功能,不过运行起来有点卡

//--------------------------------------------------------------------------------------
// File: DXUTMisc.cpp
//
// Shortcut macros and functions for using DX objects
//
// Copyright (c) Microsoft Corporation. All rights reserved
//--------------------------------------------------------------------------------------
#include "dxut.h"
#include <xinput.h>
#define DXUT_GAMEPAD_TRIGGER_THRESHOLD      30
#undef min // use __min instead
#undef max // use __max instead

CDXUTTimer* WINAPI DXUTGetGlobalTimer()
{
    // Using an accessor function gives control of the construction order
    static CDXUTTimer timer;
    return &timer;
}


//--------------------------------------------------------------------------------------
CDXUTTimer::CDXUTTimer()
{
    m_bTimerStopped     = true;
    m_llQPFTicksPerSec  = 0;

    m_llStopTime        = 0;
    m_llLastElapsedTime = 0;
    m_llBaseTime        = 0;

    // Use QueryPerformanceFrequency to get the frequency of the counter
    LARGE_INTEGER qwTicksPerSec;
    QueryPerformanceFrequency( &qwTicksPerSec );
    m_llQPFTicksPerSec = qwTicksPerSec.QuadPart;
}


//--------------------------------------------------------------------------------------
void CDXUTTimer::Reset()
{
    LARGE_INTEGER qwTime = GetAdjustedCurrentTime();
    
    m_llBaseTime        = qwTime.QuadPart;
    m_llLastElapsedTime = qwTime.QuadPart;
    m_llStopTime        = 0;
    m_bTimerStopped     = FALSE;
}


//--------------------------------------------------------------------------------------
void CDXUTTimer::Start()
{
    // Get the current time
    LARGE_INTEGER qwTime;
    QueryPerformanceCounter( &qwTime );

    if( m_bTimerStopped )
        m_llBaseTime += qwTime.QuadPart - m_llStopTime;
    m_llStopTime = 0;
    m_llLastElapsedTime = qwTime.QuadPart;
    m_bTimerStopped = FALSE;
}


//--------------------------------------------------------------------------------------
void CDXUTTimer::Stop()
{
    if( !m_bTimerStopped )
    {
        LARGE_INTEGER qwTime;
        QueryPerformanceCounter( &qwTime );
        m_llStopTime = qwTime.QuadPart;
        m_llLastElapsedTime = qwTime.QuadPart;
        m_bTimerStopped = TRUE;
    }
}


//--------------------------------------------------------------------------------------
void CDXUTTimer::Advance()
{
    m_llStopTime += m_llQPFTicksPerSec/10;
}


//--------------------------------------------------------------------------------------
double CDXUTTimer::GetAbsoluteTime()
{
    LARGE_INTEGER qwTime;
    QueryPerformanceCounter( &qwTime );

    double fTime = qwTime.QuadPart / (double) m_llQPFTicksPerSec;

    return fTime;
}


//--------------------------------------------------------------------------------------
double CDXUTTimer::GetTime()
{
    LARGE_INTEGER qwTime = GetAdjustedCurrentTime();

    double fAppTime = (double) ( qwTime.QuadPart - m_llBaseTime ) / (double) m_llQPFTicksPerSec;

    return fAppTime;
}


//--------------------------------------------------------------------------------------
void CDXUTTimer::GetTimeValues( double* pfTime, double* pfAbsoluteTime, float* pfElapsedTime )
{
    assert( pfTime && pfAbsoluteTime && pfElapsedTime );    

    LARGE_INTEGER qwTime = GetAdjustedCurrentTime();

    float fElapsedTime = (float) ((double) ( qwTime.QuadPart - m_llLastElapsedTime ) / (double) m_llQPFTicksPerSec);
    m_llLastElapsedTime = qwTime.QuadPart;

    // Clamp the timer to non-negative values to ensure the timer is accurate.
    // fElapsedTime can be outside this range if processor goes into a 
    // power save mode or we somehow get shuffled to another processor.  
    // However, the main thread should call SetThreadAffinityMask to ensure that 
    // we don't get shuffled to another processor.  Other worker threads should NOT call 
    // SetThreadAffinityMask, but use a shared copy of the timer data gathered from 
    // the main thread.
    if( fElapsedTime < 0.0f )
        fElapsedTime = 0.0f;
    
    *pfAbsoluteTime = qwTime.QuadPart / (double) m_llQPFTicksPerSec;
    *pfTime = ( qwTime.QuadPart - m_llBaseTime ) / (double) m_llQPFTicksPerSec;   
    *pfElapsedTime = fElapsedTime;
}


//--------------------------------------------------------------------------------------
float CDXUTTimer::GetElapsedTime()
{
    LARGE_INTEGER qwTime = GetAdjustedCurrentTime();

    double fElapsedTime = (float) ((double) ( qwTime.QuadPart - m_llLastElapsedTime ) / (double) m_llQPFTicksPerSec);
    m_llLastElapsedTime = qwTime.QuadPart;

    // See the explanation about clamping in CDXUTTimer::GetTimeValues()
    if( fElapsedTime < 0.0f )
        fElapsedTime = 0.0f;

    return (float)fElapsedTime;
}


//--------------------------------------------------------------------------------------
// If stopped, returns time when stopped otherwise returns current time
//--------------------------------------------------------------------------------------
LARGE_INTEGER CDXUTTimer::GetAdjustedCurrentTime()
{
    LARGE_INTEGER qwTime;
    if( m_llStopTime != 0 )
        qwTime.QuadPart = m_llStopTime;
    else
        QueryPerformanceCounter( &qwTime );
    return qwTime;
}

//--------------------------------------------------------------------------------------
bool CDXUTTimer::IsStopped()
{
    return m_bTimerStopped;
}

//--------------------------------------------------------------------------------------
// Limit the current thread to one processor (the current one). This ensures that timing code 
// runs on only one processor, and will not suffer any ill effects from power management.
// See "Game Timing and Multicore Processors" for more details
//--------------------------------------------------------------------------------------
void CDXUTTimer::LimitThreadAffinityToCurrentProc()
{
    HANDLE hCurrentProcess = GetCurrentProcess();
    
    // Get the processor affinity mask for this process
    DWORD_PTR dwProcessAffinityMask = 0;
    DWORD_PTR dwSystemAffinityMask = 0;
    
    if( GetProcessAffinityMask( hCurrentProcess, &dwProcessAffinityMask, &dwSystemAffinityMask ) != 0 && dwProcessAffinityMask )
    {
        // Find the lowest processor that our process is allows to run against
        DWORD_PTR dwAffinityMask = ( dwProcessAffinityMask & ((~dwProcessAffinityMask) + 1 ) );

        // Set this as the processor that our thread must always run against
        // This must be a subset of the process affinity mask
        HANDLE hCurrentThread = GetCurrentThread();
        if( INVALID_HANDLE_VALUE != hCurrentThread )
        {
            SetThreadAffinityMask( hCurrentThread, dwAffinityMask );
            CloseHandle( hCurrentThread );
        }
    }

    CloseHandle( hCurrentProcess );
}


//--------------------------------------------------------------------------------------
// Returns the string for the given D3DFORMAT.
//--------------------------------------------------------------------------------------
LPCWSTR WINAPI DXUTD3DFormatToString( D3DFORMAT format, bool bWithPrefix )
{
    WCHAR* pstr = NULL;
    switch( format )
    {
    case D3DFMT_UNKNOWN:         pstr = L"D3DFMT_UNKNOWN"; break;
    case D3DFMT_R8G8B8:          pstr = L"D3DFMT_R8G8B8"; break;
    case D3DFMT_A8R8G8B8:        pstr = L"D3DFMT_A8R8G8B8"; break;
    case D3DFMT_X8R8G8B8:        pstr = L"D3DFMT_X8R8G8B8"; break;
    case D3DFMT_R5G6B5:          pstr = L"D3DFMT_R5G6B5"; break;
    case D3DFMT_X1R5G5B5:        pstr = L"D3DFMT_X1R5G5B5"; break;
    case D3DFMT_A1R5G5B5:        pstr = L"D3DFMT_A1R5G5B5"; break;
    case D3DFMT_A4R4G4B4:        pstr = L"D3DFMT_A4R4G4B4"; break;
    case D3DFMT_R3G3B2:          pstr = L"D3DFMT_R3G3B2"; break;
    case D3DFMT_A8:              pstr = L"D3DFMT_A8"; break;
    case D3DFMT_A8R3G3B2:        pstr = L"D3DFMT_A8R3G3B2"; break;
    case D3DFMT_X4R4G4B4:        pstr = L"D3DFMT_X4R4G4B4"; break;
    case D3DFMT_A2B10G10R10:     pstr = L"D3DFMT_A2B10G10R10"; break;
    case D3DFMT_A8B8G8R8:        pstr = L"D3DFMT_A8B8G8R8"; break;
    case D3DFMT_X8B8G8R8:        pstr = L"D3DFMT_X8B8G8R8"; break;
    case D3DFMT_G16R16:          pstr = L"D3DFMT_G16R16"; break;
    case D3DFMT_A2R10G10B10:     pstr = L"D3DFMT_A2R10G10B10"; break;
    case D3DFMT_A16B16G16R16:    pstr = L"D3DFMT_A16B16G16R16"; break;
    case D3DFMT_A8P8:            pstr = L"D3DFMT_A8P8"; break;
    case D3DFMT_P8:              pstr = L"D3DFMT_P8"; break;
    case D3DFMT_L8:              pstr = L"D3DFMT_L8"; break;
    case D3DFMT_A8L8:            pstr = L"D3DFMT_A8L8"; break;
    case D3DFMT_A4L4:            pstr = L"D3DFMT_A4L4"; break;
    case D3DFMT_V8U8:            pstr = L"D3DFMT_V8U8"; break;
    case D3DFMT_L6V5U5:          pstr = L"D3DFMT_L6V5U5"; break;
    case D3DFMT_X8L8V8U8:        pstr = L"D3DFMT_X8L8V8U8"; break;
    case D3DFMT_Q8W8V8U8:        pstr = L"D3DFMT_Q8W8V8U8"; break;
    case D3DFMT_V16U16:          pstr = L"D3DFMT_V16U16"; break;
    case D3DFMT_A2W10V10U10:     pstr = L"D3DFMT_A2W10V10U10"; break;
    case D3DFMT_UYVY:            pstr = L"D3DFMT_UYVY"; break;
    case D3DFMT_YUY2:            pstr = L"D3DFMT_YUY2"; break;
    case D3DFMT_DXT1:            pstr = L"D3DFMT_DXT1"; break;
    case D3DFMT_DXT2:            pstr = L"D3DFMT_DXT2"; break;
    case D3DFMT_DXT3:            pstr = L"D3DFMT_DXT3"; break;
    case D3DFMT_DXT4:            pstr = L"D3DFMT_DXT4"; break;
    case D3DFMT_DXT5:            pstr = L"D3DFMT_DXT5"; break;
    case D3DFMT_D16_LOCKABLE:    pstr = L"D3DFMT_D16_LOCKABLE"; break;
    case D3DFMT_D32:             pstr = L"D3DFMT_D32"; break;
    case D3DFMT_D15S1:           pstr = L"D3DFMT_D15S1"; break;
    case D3DFMT_D24S8:           pstr = L"D3DFMT_D24S8"; break;
    case D3DFMT_D24X8:           pstr = L"D3DFMT_D24X8"; break;
    case D3DFMT_D24X4S4:         pstr = L"D3DFMT_D24X4S4"; break;
    case D3DFMT_D16:             pstr = L"D3DFMT_D16"; break;
    case D3DFMT_L16:             pstr = L"D3DFMT_L16"; break;
    case D3DFMT_VERTEXDATA:      pstr = L"D3DFMT_VERTEXDATA"; break;
    case D3DFMT_INDEX16:         pstr = L"D3DFMT_INDEX16"; break;
    case D3DFMT_INDEX32:         pstr = L"D3DFMT_INDEX32"; break;
    case D3DFMT_Q16W16V16U16:    pstr = L"D3DFMT_Q16W16V16U16"; break;
    case D3DFMT_MULTI2_ARGB8:    pstr = L"D3DFMT_MULTI2_ARGB8"; break;
    case D3DFMT_R16F:            pstr = L"D3DFMT_R16F"; break;
    case D3DFMT_G16R16F:         pstr = L"D3DFMT_G16R16F"; break;
    case D3DFMT_A16B16G16R16F:   pstr = L"D3DFMT_A16B16G16R16F"; break;
    case D3DFMT_R32F:            pstr = L"D3DFMT_R32F"; break;
    case D3DFMT_G32R32F:         pstr = L"D3DFMT_G32R32F"; break;
    case D3DFMT_A32B32G32R32F:   pstr = L"D3DFMT_A32B32G32R32F"; break;
    case D3DFMT_CxV8U8:          pstr = L"D3DFMT_CxV8U8"; break;
    default:                     pstr = L"Unknown format"; break;
    }
    if( bWithPrefix || wcsstr( pstr, L"D3DFMT_" )== NULL )
        return pstr;
    else
        return pstr + lstrlen( L"D3DFMT_" );
}


//--------------------------------------------------------------------------------------
// Returns the string for the given DXGI_FORMAT.
//--------------------------------------------------------------------------------------
LPCWSTR WINAPI DXUTDXGIFormatToString( DXGI_FORMAT format, bool bWithPrefix )
{
    WCHAR* pstr = NULL;
    switch( format )
    {
        case DXGI_FORMAT_R32G32B32A32_TYPELESS: pstr = L"DXGI_FORMAT_R32G32B32A32_TYPELESS"; break;
        case DXGI_FORMAT_R32G32B32A32_FLOAT: pstr = L"DXGI_FORMAT_R32G32B32A32_FLOAT"; break;
        case DXGI_FORMAT_R32G32B32A32_UINT: pstr = L"DXGI_FORMAT_R32G32B32A32_UINT"; break;
        case DXGI_FORMAT_R32G32B32A32_SINT: pstr = L"DXGI_FORMAT_R32G32B32A32_SINT"; break;
        case DXGI_FORMAT_R32G32B32_TYPELESS: pstr = L"DXGI_FORMAT_R32G32B32_TYPELESS"; break;
        case DXGI_FORMAT_R32G32B32_FLOAT: pstr = L"DXGI_FORMAT_R32G32B32_FLOAT"; break;
        case DXGI_FORMAT_R32G32B32_UINT: pstr = L"DXGI_FORMAT_R32G32B32_UINT"; break;
        case DXGI_FORMAT_R32G32B32_SINT: pstr = L"DXGI_FORMAT_R32G32B32_SINT"; break;
        case DXGI_FORMAT_R16G16B16A16_TYPELESS: pstr = L"DXGI_FORMAT_R16G16B16A16_TYPELESS"; break;