#include <windows.h>
#include <windev.h>
#include <types.h>
#include "blc_cmn.h"
#include "blc_hw.h"
#include "blc_glob.h"
#include "blreg.h"
#include "xsc1.h"

#define	BLMSG_TRACE	0
static CRITICAL_SECTION gBLGlobalsCriticalSection;

BOOL	gBLAutoOn = FALSE;
BOOL	gBLState = BLSTATE_ON;
BOOL	gPrevBLState = BLSTATE_OFF;
ULONG	regBLTimeout = DEFAULT_BL_OFFTIMEOUT;
HANDLE	gBLEvents[NUMBER_BL_EVENT];
ULONG	gBLOffTime = INFINITE;
ULONG	gPWMValue = 0xff;

static DWORD WINAPI BacklightThread(void);
static BOOL RunningOnAC(void);
static void ResetBacklightTimeoutNoCS();

BOOL 
InitializeBacklight(void)
{
	HANDLE  hRequestThread;
	RETAILMSG(BLMSG_TRACE, (TEXT("Backlight Initializing\r\n")));
	InitializeCriticalSection(&gBLGlobalsCriticalSection);
	if (!InitializeBacklightHardware())
	{
	RETAILMSG(BLMSG_TRACE, (TEXT("Backlight: failed to initialize backlight hardware\r\n")));
		return FALSE;
	}
	hRequestThread = CreateThread((HANDLE) NULL, 0, 
	 	 	 	 	 	 (LPTHREAD_START_ROUTINE) BacklightThread, NULL, 0,NULL);
	if (hRequestThread == NULL) 
	{
		RETAILMSG(BLMSG_TRACE, (TEXT("Backlight: failed to create BacklightThread\r\n")));
		return FALSE;
	}
	else
	{
		RETAILMSG(BLMSG_TRACE, (TEXT("Backlight: created BacklightThread\r\n")));
		CloseHandle(hRequestThread);
	}
	RETAILMSG(BLMSG_TRACE, (TEXT("Backlight Initialized\r\n")));
	return TRUE;
}