sdkmisc.cpp

声音和图片的加载功能,不过运行起来有点卡

//--------------------------------------------------------------------------------------
// File: SDKmisc.cpp
//
// Various helper functionality that is shared between SDK samples
//
// Copyright (c) Microsoft Corporation. All rights reserved
//--------------------------------------------------------------------------------------
#include "dxut.h"
#include "SDKmisc.h"
#undef min // use __min instead
#undef max // use __max instead

//--------------------------------------------------------------------------------------
// Global/Static Members
//--------------------------------------------------------------------------------------
CDXUTResourceCache& WINAPI DXUTGetGlobalResourceCache()
{
    // Using an accessor function gives control of the construction order
    static CDXUTResourceCache cache;
    return cache;
}


//--------------------------------------------------------------------------------------
// Internal functions forward declarations
//--------------------------------------------------------------------------------------
bool DXUTFindMediaSearchTypicalDirs( WCHAR* strSearchPath, int cchSearch, LPCWSTR strLeaf, WCHAR* strExePath, WCHAR* strExeName );
bool DXUTFindMediaSearchParentDirs( WCHAR* strSearchPath, int cchSearch, WCHAR* strStartAt, WCHAR* strLeafName );
INT_PTR CALLBACK DisplaySwitchToREFWarningProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam);


//--------------------------------------------------------------------------------------
// Shared code for samples to ask user if they want to use a REF device or quit
//--------------------------------------------------------------------------------------
void WINAPI DXUTDisplaySwitchingToREFWarning( DXUTDeviceVersion ver )
{
    if( DXUTGetShowMsgBoxOnError() )
    {
        DWORD dwSkipWarning = 0, dwRead = 0, dwWritten = 0;
        HANDLE hFile = NULL;

        // Read previous user settings
        WCHAR strPath[MAX_PATH];
        SHGetFolderPath( DXUTGetHWND(), CSIDL_LOCAL_APPDATA, NULL, SHGFP_TYPE_CURRENT, strPath );
        StringCchCat( strPath, MAX_PATH, L"\\DXUT\\SkipRefWarning.dat" );
        if( (hFile = CreateFile( strPath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL )) != INVALID_HANDLE_VALUE )
        {
            ReadFile( hFile, &dwSkipWarning, sizeof(DWORD), &dwRead, NULL );
            CloseHandle( hFile );
        }

        if( dwSkipWarning == 0 )
        {
            // Compact code to create a custom dialog box without using a template in a resource file.
            // If this dialog were in a .rc file, this would be a lot simpler but every sample calling this function would
            // need a copy of the dialog in its own .rc file. Also MessageBox API could be used here instead, but 
            // the MessageBox API is simpler to call but it can't provide a "Don't show again" checkbox
            typedef struct { DLGITEMTEMPLATE a; WORD b; WORD c; WORD d; WORD e; WORD f; } DXUT_DLG_ITEM; 
            typedef struct { DLGTEMPLATE a; WORD b; WORD c; WCHAR d[2]; WORD e; WCHAR f[16]; DXUT_DLG_ITEM i1; DXUT_DLG_ITEM i2; DXUT_DLG_ITEM i3; DXUT_DLG_ITEM i4; DXUT_DLG_ITEM i5; } DXUT_DLG_DATA; 

            DXUT_DLG_DATA dtp = 
            {                                                                                                                                                  
                {WS_CAPTION|WS_POPUP|WS_VISIBLE|WS_SYSMENU|DS_ABSALIGN|DS_3DLOOK|DS_SETFONT|DS_MODALFRAME|DS_CENTER,0,5,0,0,269,82},0,0,L" ",8,L"MS Shell Dlg 2", 
                {{WS_CHILD|WS_VISIBLE|SS_ICON|SS_CENTERIMAGE,0,7,7,24,24,0x100},0xFFFF,0x0082,0,0,0}, // icon
                {{WS_CHILD|WS_VISIBLE,0,40,7,230,25,0x101},0xFFFF,0x0082,0,0,0}, // static text
                {{WS_CHILD|WS_VISIBLE|WS_TABSTOP|BS_DEFPUSHBUTTON,0,80,39,50,14,IDYES},0xFFFF,0x0080,0,0,0}, // Yes button
                {{WS_CHILD|WS_VISIBLE|WS_TABSTOP,0,133,39,50,14,IDNO},0xFFFF,0x0080,0,0,0}, // No button
                {{WS_CHILD|WS_VISIBLE|WS_TABSTOP|BS_CHECKBOX,0,7,59,70,16,IDIGNORE},0xFFFF,0x0080,0,0,0}, // checkbox
            }; 

            int nResult = (int) DialogBoxIndirectParam( DXUTGetHINSTANCE(), (DLGTEMPLATE*)&dtp, DXUTGetHWND(), DisplaySwitchToREFWarningProc, (LPARAM) (ver==DXUT_D3D9_DEVICE) ? 9 : 10 );

            if( (nResult & 0x80) == 0x80 ) // "Don't show again" checkbox was checked
            {
                // Save user settings
                dwSkipWarning = 1;
                SHGetFolderPath( DXUTGetHWND(), CSIDL_LOCAL_APPDATA, NULL, SHGFP_TYPE_CURRENT, strPath );
                StringCchCat( strPath, MAX_PATH, L"\\DXUT" );
                CreateDirectory( strPath, NULL );
                StringCchCat( strPath, MAX_PATH, L"\\SkipRefWarning.dat" );
                if( (hFile = CreateFile( strPath, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, NULL )) != INVALID_HANDLE_VALUE )
                {
                    WriteFile( hFile, &dwSkipWarning, sizeof(DWORD), &dwWritten, NULL );
                    CloseHandle( hFile );
                }
            }

            // User choose not to continue
            if( (nResult & 0x0F) == IDNO )
                DXUTShutdown(1);
        }
    }
}


//--------------------------------------------------------------------------------------
// MsgProc for DXUTDisplaySwitchingToREFWarning() dialog box
//--------------------------------------------------------------------------------------
INT_PTR CALLBACK DisplaySwitchToREFWarningProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) 
{ 
    switch (message) 
    { 
        case WM_INITDIALOG:
            // Easier to set text here than in the DLGITEMTEMPLATE
            SetWindowText( hDlg, DXUTGetWindowTitle() );
            SendMessage( GetDlgItem(hDlg, 0x100), STM_SETIMAGE, IMAGE_ICON, (LPARAM)LoadIcon(0, IDI_QUESTION));
            WCHAR sz[512]; StringCchPrintf( sz, 512, L"This program needs to use the Direct3D %d reference device.  This device implements the entire Direct3D %d feature set, but runs very slowly.  Do you wish to continue?", lParam, lParam );
            SetDlgItemText( hDlg, 0x101, sz ); 
            SetDlgItemText( hDlg, IDYES, L"&Yes" );
            SetDlgItemText( hDlg, IDNO, L"&No" );
            SetDlgItemText( hDlg, IDIGNORE, L"&Don't show again" );
            break;

        case WM_COMMAND: 
            switch (LOWORD(wParam)) 
            { 
                case IDIGNORE: CheckDlgButton( hDlg, IDIGNORE, (IsDlgButtonChecked( hDlg, IDIGNORE ) == BST_CHECKED) ? BST_UNCHECKED : BST_CHECKED ); EnableWindow( GetDlgItem( hDlg, IDNO ), (IsDlgButtonChecked( hDlg, IDIGNORE ) != BST_CHECKED) ); break;
                case IDNO: EndDialog(hDlg, (IsDlgButtonChecked( hDlg, IDIGNORE ) == BST_CHECKED) ? IDNO|0x80 : IDNO|0x00 ); return TRUE; 
                case IDCANCEL:
                case IDYES: EndDialog(hDlg, (IsDlgButtonChecked( hDlg, IDIGNORE ) == BST_CHECKED) ? IDYES|0x80 : IDYES|0x00 ); return TRUE; 
            } 
            break;
    } 
    return FALSE; 
} 


//--------------------------------------------------------------------------------------
// Returns pointer to static media search buffer
//--------------------------------------------------------------------------------------
WCHAR* DXUTMediaSearchPath()
{
    static WCHAR s_strMediaSearchPath[MAX_PATH] = {0};
    return s_strMediaSearchPath;

}   

//--------------------------------------------------------------------------------------
LPCWSTR WINAPI DXUTGetMediaSearchPath()
{
    return DXUTMediaSearchPath();
}


//--------------------------------------------------------------------------------------
HRESULT WINAPI DXUTSetMediaSearchPath( LPCWSTR strPath )
{
    HRESULT hr;

    WCHAR* s_strSearchPath = DXUTMediaSearchPath();

    hr = StringCchCopy( s_strSearchPath, MAX_PATH, strPath );   
    if( SUCCEEDED(hr) )
    {
        // append slash if needed
        size_t ch;
        hr = StringCchLength( s_strSearchPath, MAX_PATH, &ch );
        if( SUCCEEDED(hr) && s_strSearchPath[ch-1] != L'\\')
        {
            hr = StringCchCat( s_strSearchPath, MAX_PATH, L"\\" );
        }
    }

    return hr;
}


//--------------------------------------------------------------------------------------
// Tries to find the location of a SDK media file
//       cchDest is the size in WCHARs of strDestPath.  Be careful not to 
//       pass in sizeof(strDest) on UNICODE builds.
//--------------------------------------------------------------------------------------
HRESULT WINAPI DXUTFindDXSDKMediaFileCch( WCHAR* strDestPath, int cchDest, LPCWSTR strFilename )
{
    bool bFound;
    WCHAR strSearchFor[MAX_PATH];
    
    if( NULL==strFilename || strFilename[0] == 0 || NULL==strDestPath || cchDest < 10 )
        return E_INVALIDARG;

    // Get the exe name, and exe path
    WCHAR strExePath[MAX_PATH] = {0};
    WCHAR strExeName[MAX_PATH] = {0};
    WCHAR* strLastSlash = NULL;
    GetModuleFileName( NULL, strExePath, MAX_PATH );
    strExePath[MAX_PATH-1]=0;
    strLastSlash = wcsrchr( strExePath, TEXT('\\') );
    if( strLastSlash )
    {
        StringCchCopy( strExeName, MAX_PATH, &strLastSlash[1] );

        // Chop the exe name from the exe path
        *strLastSlash = 0;

        // Chop the .exe from the exe name
        strLastSlash = wcsrchr( strExeName, TEXT('.') );
        if( strLastSlash )
            *strLastSlash = 0;
    }

    // Typical directories:
    //      .\
    //      ..\
    //      ..\..\
    //      %EXE_DIR%\
    //      %EXE_DIR%\..\
    //      %EXE_DIR%\..\..\
    //      %EXE_DIR%\..\%EXE_NAME%
    //      %EXE_DIR%\..\..\%EXE_NAME%

    // Typical directory search
    bFound = DXUTFindMediaSearchTypicalDirs( strDestPath, cchDest, strFilename, strExePath, strExeName );
    if( bFound )
        return S_OK;

    // Typical directory search again, but also look in a subdir called "\media\" 
    StringCchPrintf( strSearchFor, MAX_PATH, L"media\\%s", strFilename ); 
    bFound = DXUTFindMediaSearchTypicalDirs( strDestPath, cchDest, strSearchFor, strExePath, strExeName );
    if( bFound )
        return S_OK;

    WCHAR strLeafName[MAX_PATH] = {0};

    // Search all parent directories starting at .\ and using strFilename as the leaf name
    StringCchCopy( strLeafName, MAX_PATH, strFilename ); 
    bFound = DXUTFindMediaSearchParentDirs( strDestPath, cchDest, L".", strLeafName );
    if( bFound )
        return S_OK;

    // Search all parent directories starting at the exe's dir and using strFilename as the leaf name
    bFound = DXUTFindMediaSearchParentDirs( strDestPath, cchDest, strExePath, strLeafName );
    if( bFound )
        return S_OK;

    // Search all parent directories starting at .\ and using "media\strFilename" as the leaf name
    StringCchPrintf( strLeafName, MAX_PATH, L"media\\%s", strFilename ); 
    bFound = DXUTFindMediaSearchParentDirs( strDestPath, cchDest, L".", strLeafName );
    if( bFound )
        return S_OK;

    // Search all parent directories starting at the exe's dir and using "media\strFilename" as the leaf name
    bFound = DXUTFindMediaSearchParentDirs( strDestPath, cchDest, strExePath, strLeafName );
    if( bFound )
        return S_OK;

    // On failure, return the file as the path but also return an error code
    StringCchCopy( strDestPath, cchDest, strFilename );

    return DXUTERR_MEDIANOTFOUND;
}


//--------------------------------------------------------------------------------------
// Search a set of typical directories
//--------------------------------------------------------------------------------------
bool DXUTFindMediaSearchTypicalDirs( WCHAR* strSearchPath, int cchSearch, LPCWSTR strLeaf, 
                                     WCHAR* strExePath, WCHAR* strExeName )
{
    // Typical directories:
    //      .\
    //      ..\
    //      ..\..\
    //      %EXE_DIR%\
    //      %EXE_DIR%\..\
    //      %EXE_DIR%\..\..\
    //      %EXE_DIR%\..\%EXE_NAME%
    //      %EXE_DIR%\..\..\%EXE_NAME%
    //      DXSDK media path

    // Search in .\  
    StringCchCopy( strSearchPath, cchSearch, strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in ..\  
    StringCchPrintf( strSearchPath, cchSearch, L"..\\%s", strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in ..\..\ 
    StringCchPrintf( strSearchPath, cchSearch, L"..\\..\\%s", strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in ..\..\ 
    StringCchPrintf( strSearchPath, cchSearch, L"..\\..\\%s", strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in the %EXE_DIR%\ 
    StringCchPrintf( strSearchPath, cchSearch, L"%s\\%s", strExePath, strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in the %EXE_DIR%\..\ 
    StringCchPrintf( strSearchPath, cchSearch, L"%s\\..\\%s", strExePath, strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in the %EXE_DIR%\..\..\ 
    StringCchPrintf( strSearchPath, cchSearch, L"%s\\..\\..\\%s", strExePath, strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in "%EXE_DIR%\..\%EXE_NAME%\".  This matches the DirectX SDK layout
    StringCchPrintf( strSearchPath, cchSearch, L"%s\\..\\%s\\%s", strExePath, strExeName, strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in "%EXE_DIR%\..\..\%EXE_NAME%\".  This matches the DirectX SDK layout
    StringCchPrintf( strSearchPath, cchSearch, L"%s\\..\\..\\%s\\%s", strExePath, strExeName, strLeaf ); 
    if( GetFileAttributes( strSearchPath ) != 0xFFFFFFFF )
        return true;

    // Search in media search dir 
    WCHAR* s_strSearchPath = DXUTMediaSearchPath();