// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (c) Microsoft Corporation. All rights reserved.

//-----------------------------------------------------------------------------
// File: DXUtil.h
//
// Desc: Helper functions and typing shortcuts for DirectX programming.
//-----------------------------------------------------------------------------
#ifndef DXUTIL_H
#define DXUTIL_H


//-----------------------------------------------------------------------------
// Miscellaneous helper functions
//-----------------------------------------------------------------------------
#define SAFE_DELETE(p)       { if(p) { delete (p);     (p)=NULL; } }
#define SAFE_DELETE_ARRAY(p) { if(p) { delete[] (p);   (p)=NULL; } }
#define SAFE_RELEASE(p)      { if(p) { (p)->Release(); (p)=NULL; } }


//-----------------------------------------------------------------------------
// Name: DXUtil_Read*RegKey() and DXUtil_Write*RegKey()
// Desc: Helper functions to read/write a string registry key 
//-----------------------------------------------------------------------------
HRESULT DXUtil_WriteStringRegKey( HKEY hKey, LPCTSTR strRegName, LPCTSTR strValue );
HRESULT DXUtil_WriteFloatRegKey( HKEY hKey, LPCTSTR strRegName, FLOAT fValue );
HRESULT DXUtil_WriteIntRegKey( HKEY hKey, LPCTSTR strRegName, DWORD dwValue );
HRESULT DXUtil_WriteGuidRegKey( HKEY hKey, LPCTSTR strRegName, GUID guidValue );
HRESULT DXUtil_WriteBoolRegKey( HKEY hKey, LPCTSTR strRegName, BOOL bValue );

HRESULT DXUtil_ReadStringRegKeyCch( HKEY hKey, LPCTSTR strRegName, TCHAR* strDest, DWORD cchDest, LPCTSTR strDefault );
HRESULT DXUtil_ReadStringRegKeyCb( HKEY hKey, LPCTSTR strRegName, TCHAR* strDest, DWORD cbDest, LPCTSTR strDefault );
HRESULT DXUtil_ReadFloatRegKey( HKEY hKey, LPCTSTR strRegName, FLOAT* fDest, FLOAT fDefault );
HRESULT DXUtil_ReadIntRegKey( HKEY hKey, LPCTSTR strRegName, DWORD* pdwValue, DWORD dwDefault );
HRESULT DXUtil_ReadGuidRegKey( HKEY hKey, LPCTSTR strRegName, GUID* pGuidValue, GUID& guidDefault );
HRESULT DXUtil_ReadBoolRegKey( HKEY hKey, LPCTSTR strRegName, BOOL* pbValue, BOOL bDefault );


//-----------------------------------------------------------------------------
// Name: DXUtil_Timer()
// Desc: Performs timer opertations. Use the following commands:
//          TIMER_RESET           - to reset the timer
//          TIMER_START           - to start the timer
//          TIMER_STOP            - to stop (or pause) the timer
//          TIMER_ADVANCE         - to advance the timer by 0.1 seconds
//          TIMER_GETABSOLUTETIME - to get the absolute system time
//          TIMER_GETAPPTIME      - to get the current time
//          TIMER_GETELAPSEDTIME  - to get the time that elapsed between 
//                                  TIMER_GETELAPSEDTIME calls
//-----------------------------------------------------------------------------
enum TIMER_COMMAND { TIMER_RESET, TIMER_START, TIMER_STOP, TIMER_ADVANCE,
                     TIMER_GETABSOLUTETIME, TIMER_GETAPPTIME, TIMER_GETELAPSEDTIME };
FLOAT __stdcall DXUtil_Timer( TIMER_COMMAND command );




//-----------------------------------------------------------------------------
// Readme functions
//-----------------------------------------------------------------------------
VOID DXUtil_LaunchReadme( HWND hWnd, LPCTSTR strLoc = NULL );


//-----------------------------------------------------------------------------
// Debug printing support
// See dxerr9.h for more debug printing support
//-----------------------------------------------------------------------------
VOID    DXUtil_Trace( LPCTSTR strMsg, ... );

#if defined(DEBUG) | defined(_DEBUG)
    #define DXTRACE             DXUtil_Trace
    #define DXTRACE_ERR(str,hr) (DXUtil_Trace(str), hr)
#else
    #define DXTRACE                 sizeof
    #define DXTRACE_ERR(str,hr)     (hr)
#endif


//-----------------------------------------------------------------------------
// Name: ArrayListType
// Desc: Indicates how data should be stored in a CArrayList
//-----------------------------------------------------------------------------
enum ArrayListType
{
    AL_VALUE,       // entry data is copied into the list
    AL_REFERENCE,   // entry pointers are copied into the list
};


//-----------------------------------------------------------------------------
// Name: CArrayList
// Desc: A growable array
//-----------------------------------------------------------------------------
class CArrayList
{
protected:
    ArrayListType m_ArrayListType;
    void* m_pData;
    UINT m_BytesPerEntry;
    UINT m_NumEntries;
    UINT m_NumEntriesAllocated;

public:
    CArrayList( ArrayListType Type, UINT BytesPerEntry = 0 );
    ~CArrayList( void );
    HRESULT Add( void* pEntry );
    void Remove( UINT Entry );
    void* GetPtr( UINT Entry );
    UINT Count( void ) { return m_NumEntries; }
    bool Contains( void* pEntryData );
    void Clear( void ) { m_NumEntries = 0; }
};

//-----------------------------------------------------------------------------
// WinCE build support
//-----------------------------------------------------------------------------

#ifdef UNDER_CE

#define CheckDlgButton(hdialog, id, state) ::SendMessage(::GetDlgItem(hdialog, id), BM_SETCHECK, state, 0)
#define IsDlgButtonChecked(hdialog, id) ::SendMessage(::GetDlgItem(hdialog, id), BM_GETCHECK, 0L, 0L)
#define GETTIMESTAMP GetTickCount
#define _TWINCE(x) _T(x)

__inline int GetScrollPos(HWND hWnd, int nBar)
{
	SCROLLINFO si;
	memset(&si, 0, sizeof(si));
	si.cbSize = sizeof(si);
	si.fMask = SIF_POS;
	if (!GetScrollInfo(hWnd, nBar, &si))
	{
		return 0;
	}
	else
	{
		return si.nPos;
	}
}

#else // !UNDER_CE

#define GETTIMESTAMP timeGetTime
#define _TWINCE(x) x

#endif // UNDER_CE


#endif // DXUTIL_H