//! Reads an already-opened Jpeg2000 file.
ILboolean ilLoadJp2F(ILHANDLE File)
{
	ILuint			FirstPos;
	ILboolean		bRet;
	jas_stream_t	*Stream;

	iSetInputFile(File);
	FirstPos = itell();

	if (jas_init())
	{
		ilSetError(IL_LIB_JP2_ERROR);
		return IL_FALSE;
	}
	Stream = iJp2ReadStream();
	if (!Stream)
	{
		ilSetError(IL_COULD_NOT_OPEN_FILE);
		return IL_FALSE;
	}

	bRet = iLoadJp2Internal(Stream, NULL);
	// Close the input stream.
	jas_stream_close(Stream);

	iseek(FirstPos, IL_SEEK_SET);

	return bRet;
}

//! Checks if the ILHANDLE contains a valid .bmp file at the current position.
ILboolean ilIsValidBmpF(ILHANDLE File) {
	ILuint		FirstPos;
	ILboolean	bRet;

	iSetInputFile(File);
	FirstPos = itell();
	bRet = iIsValidBmp();
	iseek(FirstPos, IL_SEEK_SET);

	return bRet;
}

//! Reads an already-opened Pix file
ILboolean ilLoadPixF(ILHANDLE File)
{
	ILuint		FirstPos;
	ILboolean	bRet;

	iSetInputFile(File);
	FirstPos = itell();
	bRet = iLoadPixInternal();
	iseek(FirstPos, IL_SEEK_SET);

	return bRet;
}

//! Reads an already-opened raw data file
ILboolean ILAPIENTRY ilLoadDataF(ILHANDLE File, ILuint Width, ILuint Height, ILuint Depth, ILubyte Bpp)
{
	ILuint		FirstPos;
	ILboolean	bRet;

	iSetInputFile(File);
	FirstPos = iCurImage->io.tell(iCurImage->io.handle);
	bRet = iLoadDataInternal(Width, Height, Depth, Bpp);
	iCurImage->io.seek(iCurImage->io.handle, FirstPos, IL_SEEK_SET);

	return bRet;
}

//! Checks if the ILHANDLE contains a valid tiff file at the current position.
ILboolean ilIsValidF_TIFF(ILHANDLE File)
{
	ILuint		FirstPos;
	ILboolean	bRet;

	iSetInputFile(File);
	FirstPos = itell();
	bRet = ilisValidTiffFunc();
	iseek(FirstPos, IL_SEEK_SET);

	return bRet;
}

//! Reads an already-opened IFF file
ILboolean ilLoadIffF(ILHANDLE File)
{
	ILuint		FirstPos;
	ILboolean	bRet;

	iSetInputFile(File);
	FirstPos = itell();
	bRet = iLoadIffInternal();
	iseek(FirstPos, IL_SEEK_SET);

	// Lbm files can have the .iff extension as well, so if Iff-loading failed,
	//  try to load it as a Lbm.
	if (bRet == IL_FALSE)
		return ilLoadIlbmF(File);

	return bRet;
}

// Reads an .xpm file
ILboolean ilLoadXpm(ILconst_string FileName)
{
	ILHANDLE	XpmFile;
	ILboolean	bXpm = IL_FALSE;

	XpmFile = iopenr(FileName);
	if (XpmFile == NULL) {
		ilSetError(IL_COULD_NOT_OPEN_FILE);
		return bXpm;
	}

	iSetInputFile(XpmFile);
	bXpm = ilLoadXpmF(XpmFile);
	icloser(XpmFile);

	return bXpm;
}

// Reads a Sun file
ILboolean ilLoad_SUN(ILconst_string FileName)
{
	ILHANDLE	SunFile;
	ILboolean	bSun = IL_FALSE;

	SunFile = iopenr(FileName);
	if (SunFile == NULL) {
		ilSetError(IL_COULD_NOT_OPEN_FILE);
		return bSun;
	}

	iSetInputFile(SunFile);

	bSun = ilLoadF_SUN(SunFile);

	icloser(SunFile);

	return bSun;
}