Вывод изображения FreeImage, без создания промежуточного файла

#Include <FreeImage.au3>

Global $ImageHandle = -1, $WorkingFileName, $FIF

_FreeImage_LoadDLL(@ScriptDir & '\FreeImage.dll')
_FreeImage_Initialise()

GUICreate('FreeImage Test GUI', 800, 700)
$ShowPic = GUICtrlCreatePic('', 0, 0, 800, 600)

$btnOpen = GUICtrlCreateButton('Choose File', 10, 610, 100, 30)
GUICtrlSetTip(-1, 'Only a copy of the image will be used')

$btnFlipH = GUICtrlCreateButton('Flip Horizontal', 120, 610, 100, 30)
$btnFlipV = GUICtrlCreateButton('Flip Vertical', 230, 610, 100, 30)
$btnRotate = GUICtrlCreateButton('Rotate ...', 340, 610, 100, 30)

GUISetState()

While 1
    Switch GUIGetMsg()
        Case - 3
            Exit
        Case $btnOpen
            _OpenImage()
        Case $btnFlipH
            If $ImageHandle <> -1 Then
                _FreeImage_FlipHorizontal($ImageHandle)
                _FreeImage_SaveU($FIF, $ImageHandle, $WorkingFileName)
                _ShowImage()
            EndIf
        Case $btnFlipV
            If $ImageHandle <> -1 Then
                _FreeImage_FlipVertical($ImageHandle)
                _FreeImage_SaveU($FIF, $ImageHandle, $WorkingFileName)
                _ShowImage()
            EndIf
        Case $btnRotate
            If $ImageHandle <> -1 Then
                $hImageNew = _FreeImage_RotateClassic($ImageHandle, Number(InputBox('Rotate', 'angle for rotation', 90)))
                _FreeImage_SaveU($FIF, $hImageNew, $WorkingFileName)
                _FreeImage_Unload($ImageHandle)
                $ImageHandle = $hImageNew
                _ShowImage()
            EndIf
    EndSwitch
WEnd

Func _OpenImage()
    Local $sFile = FileOpenDialog('Choose Image', '', 'Image Files (*.jpg;*.jpeg;*.bmp;*.gif)', 3)
    If @error Then Return
    If $ImageHandle <> -1 Then _FreeImage_Unload($ImageHandle)
    Local $dot = StringInStr($sFile, '.', 1, -1)
    Local $Name = StringLeft($sFile, $dot - 1)
    Local $Ext = StringMid($sFile, $dot)
    $WorkingFileName = $Name & '_FI4AU3' & $Ext
    FileCopy($sFile, $WorkingFileName)
    $FIF = _FreeImage_GetFileTypeU($WorkingFileName)
    If $FIF = $FIF_UNKNOWN Then
        $FIF = _FreeImage_GetFIFFromFilenameU($WorkingFileName)
    EndIf
    $ImageHandle = _FreeImage_LoadU($FIF, $sFile)
    _ShowImage()
EndFunc   ;==>_OpenImage

Func _SizeProportional(ByRef $Width, ByRef $Height, $WDesired, $HDesired, $WSrc, $HSrc)
    ; Prog@ndy
    Local $RatioDes = ($WDesired / $HDesired)
    Local $CurrentRatio = ($WSrc / $HSrc)

    If $CurrentRatio > $RatioDes Then ; scale height
        $Width = $WDesired
        $Height = $WDesired / $CurrentRatio
    Else ; scale width
        $Width = $HDesired * $CurrentRatio
        $Height = $HDesired
    EndIf

EndFunc   ;==>_SizeProportional

Func _ShowImage()
    Local $Width, $Height
    _SizeProportional($Width, $Height, 800, 600, _FreeImage_GetWidth($ImageHandle), _FreeImage_GetHeight($ImageHandle))
    GUICtrlSetPos($ShowPic, 0, 0, $Width, $Height)
    GUICtrlSetImage($ShowPic, $WorkingFileName)
EndFunc   ;==>_ShowImage

Func OnAutoItExit()
    If $ImageHandle <> -1 Then _FreeImage_Unload($ImageHandle)
    _FreeImage_DeInitialise()
EndFunc   ;==>OnAutoItExit