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Chance

Encode image in memory without saving to file [Save image to stream]

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Chance

_GDIPlus_Startup()
$hImage = _GDIPlus_BitmapCreateFromScan0($iWidth, $iHeight)
$hGraphic = _GDIPlus_ImageGetGraphicsContext($hImage)
$hBrush = _GDIPlus_BrushCreateSolid(0xFF000000)
_GDIPlus_GraphicsFillRect($hGraphic, 0, 0, $iWidth, $iHeight, $hBrush)
$hFormat = _GDIPlus_StringFormatCreate()
$hFamily = _GDIPlus_FontFamilyCreate("OCR A Extended")
$hFont = _GDIPlus_FontCreate($hFamily, $FontSize, 0)
$tLayout = _GDIPlus_RectFCreate(10, 10, 0, 0)
$aInfo = _GDIPlus_GraphicsMeasureString($hGraphic, $sString, $hFont, $tLayout, $hFormat)
$hBrush = _GDIPlus_BrushCreateSolid(0xFF37FF00)
_GDIPlus_GraphicsDrawStringEx($hGraphic, $sString, $hFont, $aInfo[0], $hFormat, $hBrush)
$hBitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hImage)
_WinAPI_DeleteObject($hBitmap)
_GDIPlus_FontDispose($hFont)
_GDIPlus_FontFamilyDispose($hFamily)
_GDIPlus_StringFormatDispose($hFormat)
_GDIPlus_BrushDispose($hBrush)
_GDIPlus_GraphicsDispose($hGraphic)
_GDIPlus_GraphicsDispose($hGraphic)
$TempImg = _TempFile(@ScriptDir, "", ".png")
_GDIPlus_ImageSaveToFile($hImage, $TempImg)
$NewImage = FileRead($TempImage)

I'd like to get rid of this

 

$TempImg = _TempFile(@ScriptDir, "", ".png")
_GDIPlus_ImageSaveToFile($hImage, $TempImg)
$NewImage = FileRead($TempImage)

For example, I'm looking to encode the image object from bmp (as I think it is) to PNG, jpg, jpeg, tiff etc without actually having to save the image to the hard drive and then re-reading it to memory.

I've failed to locate anything like this on the forums...

Edited by FlutterShy

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Chance

Select what you want to get rid of, and hit the delete key.

use $hImage however you see fit.

Ok.

My point is I'd like to figure out how to convert an image in memory from bmp to Jpg, png or gif, any would work fine, so far I only know how to do it by saving the file.

On a side note, the other day you asked why you haven't become an MVP, maybe look at some of your posts to get some insight.

Edited by FlutterShy

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Chance

:C

bump...

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Chance

What have you "figured out" so far?

I've been looking at some C++ function that did this by saving an image to a stream and doing it in memory, lead me to a post by the one and only UEZ, modified the function I found and surprisingly enough, it's exactly what I needed.

Func _GDIPlus_SaveImageToStream($hBitmap, $iQuality = 50, $Encoder = "jpg") ;coded by Andreik, modified by UEZ, FS
    Local $tParams
    Local $tData
    Local $pData
    Local $pParams

    Local $sImgCLSID = _GDIPlus_EncodersGetCLSID($Encoder)
    Local $tGUID = _WinAPI_GUIDFromString($sImgCLSID)
    Local $pEncoder = DllStructGetPtr($tGUID)

    If $Encoder == "jpg" Or $Encoder == "jpeg" Then
        $tParams = _GDIPlus_ParamInit(1)
        $tData = DllStructCreate("int Quality")
        DllStructSetData($tData, "Quality", $iQuality) ;quality 0-100
        $pData = DllStructGetPtr($tData)
        _GDIPlus_ParamAdd($tParams, $GDIP_EPGQUALITY, 1, $GDIP_EPTLONG, $pData)
        $pParams = DllStructGetPtr($tParams)
    Else
        $pParams = 0
    EndIf

    Local $hStream = DllCall("ole32.dll", "uint", "CreateStreamOnHGlobal", "ptr", 0, "bool", True, "ptr*", 0)
    If @error Then Return SetError(1, 0, 0)
    $hStream = $hStream[3]
    DllCall($ghGDIPDll, "uint", "GdipSaveImageToStream", "ptr", $hBitmap, "ptr", $hStream, "ptr", $pEncoder, "ptr", $pParams)
    _GDIPlus_BitmapDispose($hBitmap)
    Local $hMemory = DllCall("ole32.dll", "uint", "GetHGlobalFromStream", "ptr", $hStream, "ptr*", 0)
    If @error Then Return SetError(2, 0, 0)

    $hMemory = $hMemory[2]
    Local $iMemSize = _MemGlobalSize($hMemory)
    Local $pMem = _MemGlobalLock($hMemory)

    $tData = DllStructCreate("byte[" & $iMemSize & "]", $pMem)
    Local $bData = DllStructGetData($tData, 1)
    Local $tVARIANT = DllStructCreate("word vt;word r1;word r2;word r3;ptr data;ptr")

    DllCall("oleaut32.dll", "long", "DispCallFunc", "ptr", $hStream, "dword", 8 + 8 * @AutoItX64, "dword", 4, "dword", 23, "dword", 0, "ptr", 0, "ptr", 0, "ptr", DllStructGetPtr($tVARIANT)) ;http://msdn.microsoft.com/en-us/library/windows/desktop/ms221473(v=vs.85).aspx
    _MemGlobalFree($hMemory)

    Return $bData
EndFunc   ;==>_GDIPlus_SaveImageToStream

P.S. Thanks for the "help".

Edited by FlutterShy

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"(.*)\..*", "$1") & "_Blue." & $sType) If $o = 5 Then MsgBox(64 + 262144, "Information", "Images properly saved to " & StringRegExpReplace($sFile, "(.*)\\.*", "$1"), 30, $hGUI) Else MsgBox(16 + 262144, "Error", "One or more images could not saved to " & StringRegExpReplace($sFile, "(.*)\\.*", "$1") & ".", 30, $hGUI) EndIf EndSwitch If WinActive($hGUI) Then $aMouseInfo = GUIGetCursorInfo($hGUI) Switch $aMouseInfo[4] Case $iPic_Histogram If $bImgLoaded Then $aPos_hWnd = WinGetPos($hGUI) $imp = Max(1, Min(256, -19 + $aMouseInfo[0])) Switch $s Case "L" $iVal = $aLuminosity[$imp] Case "C" $iVal = $aCRGB[$imp] Case "R" $iVal = DllStructGetData($tStructChannel0, "channel0", $imp) Case "G" $iVal = DllStructGetData($tStructChannel1, "channel1", $imp) Case "B" $iVal = DllStructGetData($tStructChannel2, "channel2", $imp) EndSwitch If $iMpos_oldx <> $aMouseInfo[0] Or $iMpos_oldy <> $aMouseInfo[1] Then ToolTip("Index: " & $imp & ", Value: " & Round($iVal, 0) & ", Average: " & Round($fAverage_L, 2), $aPos_hWnd[0] + $aMouseInfo[0] - 60, $aMouseInfo[1] + $aPos_hWnd[1] - 20) $iMpos_oldx = $aMouseInfo[0] $iMpos_oldy = $aMouseInfo[1] EndIf ShowPreview($iPic_Histogram) $bShow = True $bHide = False EndIf Case Else If Not $bHide Then GUISetState(@SW_HIDE, $hGui_Preview) $bHide = True ToolTip("") EndIf $bShow = False EndSwitch EndIf WEnd Func AnimateLabel() Local Static $v = Int((UBound($aLabelCredit_AnimPos) - ($fLimes * $fStep * 100)) / 2) Local $u For $u = 0 To UBound($aLabelCredit_Pos) - 1 GUICtrlSetPos($aLabelCredit_Pos[$u][3], $aLabelCredit_Pos[$u][1], $aLabelCredit_AnimPos[$v - $u]) Next If $v - $u < 0 Then $v = UBound($aLabelCredit_AnimPos) - 1 $v -= 1 EndFunc ;==>AnimateLabel Func Min($a, $b) If $a < $b Then Return $a Return $b EndFunc ;==>Min Func Max($a, $b) If $a > $b Then Return $a Return $b EndFunc ;==>Max Func ShowPreview($iCtrl) $aPosWin = WinGetPos($hGUI) $aPosCtrl = ControlGetPos($hGUI, "", $iCtrl) Local $iNewX, $iNewX1 = $aPosWin[0] - $ihGui_PreviewSize + 10, $iNewX2 = $aPosWin[0] + $aPosWin[2] - 10 $iNewX = $iNewX1 If $iNewX1 < $aFullScreen[0] Then $iNewX = $iNewX2 EndIf WinMove($hGui_Preview, "", $iNewX, $aPosWin[1] + 50) GUISetState(@SW_SHOWNOACTIVATE, $hGui_Preview) EndFunc ;==>ShowPreview Func _GetImage($sFile, $iWH, $iBkClr = 0xFFFFFF, $bCheckerboard_Bg = True) Local $hBmp1, $hBitmap, $hGraphic, $hImage, $iW, $iH, $aGS, $hBmp2, $aFTS $aFTS = FileGetTime($sFile) If @error Then Return SetError(1, 0, 0) $hBmp1 = _WinAPI_CreateBitmap($iWH, $iWH, 1, 32) $hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hBmp1) $hGraphic = _GDIPlus_ImageGetGraphicsContext($hBitmap) _WinAPI_DeleteObject($hBmp1) $hImage = _GDIPlus_ImageLoadFromFile($sFile) $iW = _GDIPlus_ImageGetWidth($hImage) $iH = _GDIPlus_ImageGetHeight($hImage) GUICtrlSetData($idLabel_Info, StringRegExpReplace($sFile, ".*\\(.*)", "$1") & @LF & Round(FileGetSize($sFile) / 1024, 0) & " kb (" & $iW & " x " & $iH & ")" & @LF & $aFTS[0] & "/" & $aFTS[1] & "/" & $aFTS[2] & " " & $aFTS[3] & ":" & $aFTS[4] & ":" & $aFTS[5] & @LF & "Alpha: " & $bIsAlpha & ", Gray: " & $bIsGray) $aGS = _GetScale($iW, $iH, $iWH) Switch $bCheckerboard_Bg Case True ;~ _GDIPlus_GraphicsFillRect($hGraphic, 0, 0, $iWH, $iWH, $hTexture_Checkerboard) _GDIPlus_GraphicsClear($hGraphic, BitOR(0xFF000000, $iBkClr)) _GDIPlus_GraphicsFillRect($hGraphic, $aGS[0], $aGS[1], $aGS[2], $aGS[3], $hTexture_Checkerboard) Case False _GDIPlus_GraphicsClear($hGraphic, BitOR(0xFF000000, $iBkClr)) EndSwitch _GDIPlus_GraphicsDrawImageRect($hGraphic, $hImage, $aGS[0], $aGS[1], $aGS[2], $aGS[3]) _GDIPlus_ImageDispose($hImage) _GDIPlus_GraphicsDispose($hGraphic) $hBmp2 = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap) _GDIPlus_BitmapDispose($hBitmap) Return $hBmp2 EndFunc ;==>_GetImage Func _GetScale($iW, $iH, $iWH) Local $aRet[4] If $iW <= $iWH And $iH <= $iWH Then $aRet[2] = $iW $aRet[3] = $iH $aRet[0] = ($iWH - $aRet[2]) / 2 $aRet[1] = ($iWH - $aRet[3]) / 2 ElseIf $iW > $iH Then $aRet[2] = $iWH $aRet[3] = $iH / ($iW / $iWH) $aRet[0] = 0 $aRet[1] = ($iWH - $aRet[3]) / 2 ElseIf $iW < $iH Then $aRet[2] = $iW / ($iH / $iWH) $aRet[3] = $iWH $aRet[0] = ($iWH - $aRet[2]) / 2 $aRet[1] = 0 ElseIf $iW = $iH Then $aRet[2] = $iWH $aRet[3] = $iWH $aRet[0] = 0 $aRet[1] = 0 EndIf Return $aRet EndFunc ;==>_GetScale Func _hBmpToPicControl($iCID, ByRef $hBmp, $iFlag = 0) Local $hOldBmp $hOldBmp = GUICtrlSendMsg($iCID, $STM_SETIMAGE, $IMAGE_BITMAP, $hBmp) If $hOldBmp Then _WinAPI_DeleteObject($hOldBmp) If $iFlag Then _WinAPI_DeleteObject($hBmp) EndFunc ;==>_hBmpToPicControl Func _GDIPlus_CreateHistogram($sRounding = "Ceiling") Local $iMaxL, $iMaxC, $iMaxR, $iMaxG, $iMaxB, $a, $r, $g, $b, $yR, $yG, $yB, $iRedAv, $iGreenAv, $iBlueAv For $i = 1 + $bIsAlpha To 256 If $bIsAlpha Then ;~ ConsoleWrite("Alpha: " & DllStructGetData($tStructChannel0, "channel0", $i) & @CRLF) $r = DllStructGetData($tStructChannel1, "channel1", $i) $yR = $r * $frY If DllStructGetData($tStructChannel1 , "channel1", $i) > $iMaxR Then $iMaxR = $r $g = DllStructGetData($tStructChannel2, "channel2", $i) $yG = $g * $fgY If DllStructGetData($tStructChannel2 , "channel2", $i) > $iMaxG Then $iMaxG = $g $b = DllStructGetData($tStructChannel3, "channel3", $i) $yB = $b * $fbY If DllStructGetData($tStructChannel3 , "channel3", $i) > $iMaxB Then $iMaxB = $b $fAverage_cRGB += $r + $g + $b $fAverage_L += $yR + $yG + $yB Else $r = DllStructGetData($tStructChannel0, "channel0", $i) $yR = $r * $frY If DllStructGetData($tStructChannel0 , "channel0", $i) > $iMaxR Then $iMaxR = $r $g = DllStructGetData($tStructChannel1, "channel1", $i) $yG = $g * $fgY If DllStructGetData($tStructChannel1 , "channel1", $i) > $iMaxG Then $iMaxG = $g $b = DllStructGetData($tStructChannel2, "channel2", $i) $yB = $b * $fbY If DllStructGetData($tStructChannel2 , "channel2", $i) > $iMaxB Then $iMaxB = $b EndIf $fAverage_cRGB += $r + $g + $b $fAverage_L += $yR + $yG + $yB $aLuminosity[$i] = $yR + $yG + $yB If $aLuminosity[$i] > $iMaxL Then $iMaxL = $aLuminosity[$i] $aCRGB[$i] = ($r + $g + $b) / 3 If $aCRGB[$i] > $iMaxC Then $iMaxC = $aCRGB[$i] Next $fAverage_cRGB /= 256 * 3 $fAverage_L /= 256 _GDIPlus_GraphicsClear($hCtxt_HL, 0xFFFFFFFF) _GDIPlus_GraphicsClear($hCtxt_HC, 0xFFFFFFFF) _GDIPlus_GraphicsClear($hCtxt_HR, 0xFFFFFFFF) _GDIPlus_GraphicsClear($hCtxt_HG, 0xFFFFFFFF) _GDIPlus_GraphicsClear($hCtxt_HB, 0xFFFFFFFF) Local $iDL = 1, $iDC = 1, $iDR = 1, $iDG = 1, $iDB = 1 Local $sRoundings = "Round,Ceiling,Floor," If Not StringInStr($sRoundings, $sRounding) Then $sRounding = "Ceiling" If $iMaxL > 128 Then ;~ $iDL = Ceiling($iMaxL / 128) $iDL = Execute($sRounding & "(" & $iMaxL / 128 & ")") Else $iDL = 1 / (128 / $iMaxL) EndIf If $iMaxC > 128 Then ;~ $iDC = Ceiling($iMaxC / 128) $iDC = Execute($sRounding & "(" & $iMaxC / 128 & ")") Else $iDC = 1 / (128 / $iMaxC) EndIf If $iMaxR > 128 Then ;~ $iDR = Ceiling($iMaxR / 128) $iDR = Execute($sRounding & "(" & $iMaxR / 128 & ")") Else $iDR = 1 / (128 / $iMaxR) EndIf If $iMaxG > 128 Then ;~ $iDG = Ceiling($iMaxG / 128) $iDG = Execute($sRounding & "(" & $iMaxG / 128 & ")") Else $iDG = 1 / (128 / $iMaxG) EndIf If $iMaxB > 128 Then ;~ $iDB = Ceiling($iMaxB / 128) $iDB = Execute($sRounding & "(" & $iMaxB / 128 & ")") Else $iDB = 1 / (128 / $iMaxB) EndIf For $i = 1 To 256 _GDIPlus_PenSetColor($hPen_H, 0xFF000000) _GDIPlus_GraphicsDrawLine($hCtxt_HL, $i - 1, 127, $i - 1, 127 - (Int($aLuminosity[$i] / $iDL)), $hPen_H) _GDIPlus_PenSetColor($hPen_H, 0xFF000000) _GDIPlus_GraphicsDrawLine($hCtxt_HC, $i - 1, 127, $i - 1, 127 - (Int($aCRGB[$i] / $iDC)), $hPen_H) _GDIPlus_PenSetColor($hPen_H, 0xFFB00000) If $bIsAlpha Then _GDIPlus_GraphicsDrawLine($hCtxt_HR, $i - 1, 127, $i - 1, 127 - (Int(DllStructGetData($tStructChannel1, "channel1", $i) / $iDR)), $hPen_H) _GDIPlus_PenSetColor($hPen_H, 0xFF00B000) _GDIPlus_GraphicsDrawLine($hCtxt_HG, $i - 1, 127, $i - 1, 127 - (Int(DllStructGetData($tStructChannel2, "channel2", $i) / $iDG)), $hPen_H) _GDIPlus_PenSetColor($hPen_H, 0xFF0000B0) _GDIPlus_GraphicsDrawLine($hCtxt_HB, $i - 1, 127, $i - 1, 127 - (Int(DllStructGetData($tStructChannel3, "channel3", $i) / $iDB)), $hPen_H) Else _GDIPlus_GraphicsDrawLine($hCtxt_HR, $i - 1, 127, $i - 1, 127 - (Int(DllStructGetData($tStructChannel0, "channel0", $i) / $iDR)), $hPen_H) _GDIPlus_PenSetColor($hPen_H, 0xFF00B000) _GDIPlus_GraphicsDrawLine($hCtxt_HG, $i - 1, 127, $i - 1, 127 - (Int(DllStructGetData($tStructChannel1, "channel1", $i) / $iDG)), $hPen_H) _GDIPlus_PenSetColor($hPen_H, 0xFF0000B0) _GDIPlus_GraphicsDrawLine($hCtxt_HB, $i - 1, 127, $i - 1, 127 - (Int(DllStructGetData($tStructChannel2, "channel2", $i) / $iDB)), $hPen_H) EndIf Next EndFunc ;==>_GDIPlus_CreateHistogram Func _GDIPlus_CreateColorGradient($sColorChannel, $iW, $iH, $bHBitmap = True) Local $hBitmap = _GDIPlus_BitmapCreateFromScan0($iW, $iH) Local $hCtxt = _GDIPlus_ImageGetGraphicsContext($hBitmap) ;~ _GDIPlus_GraphicsSetSmoothingMode($hCtxt, 2) Local $hPen = _GDIPlus_PenCreate() _GDIPlus_PenSetLineJoin($hPen, $iLineJoinBevel) Local $i, $c For $i = 0 To $iW $c = Hex($i, 2) Switch $sColorChannel Case "L" _GDIPlus_PenSetColor($hPen, "0xFF" & $c & $c & $c) Case "C" _GDIPlus_PenSetColor($hPen, "0xFF" & $c & $c & $c) Case "R" _GDIPlus_PenSetColor($hPen, "0xFF" & $c & "0000") Case "G" _GDIPlus_PenSetColor($hPen, "0xFF00" & $c & "00") Case "B" _GDIPlus_PenSetColor($hPen, "0xFF0000" & $c) EndSwitch _GDIPlus_GraphicsDrawLine($hCtxt, $i, 0, $i, $iH, $hPen) Next _GDIPlus_GraphicsDispose($hCtxt) _GDIPlus_PenDispose($hPen) If $bHBitmap Then Local $hHBmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap) _GDIPlus_BitmapDispose($hBitmap) Return $hHBmp EndIf Return $hBitmap EndFunc ;==>_GDIPlus_CreateColorGradient Func _GDIPlus_CreateCheckerboardTexture($iSquareSize = 80, $iCol1 = 0xFFECECEC, $iCol2 = 0xFFDFDFDF) Local $hPatternBitmap = _GDIPlus_BitmapCreateFromScan0(2 * $iSquareSize, 2 * $iSquareSize) Local $hCtxt = _GDIPlus_ImageGetGraphicsContext($hPatternBitmap) Local $hBrush0 = _GDIPlus_BrushCreateSolid($iCol1) Local $hBrush1 = _GDIPlus_BrushCreateSolid($iCol2) _GDIPlus_GraphicsFillRect($hCtxt, 0, 0, $iSquareSize, $iSquareSize, $hBrush0) _GDIPlus_GraphicsFillRect($hCtxt, $iSquareSize, 0, $iSquareSize, $iSquareSize, $hBrush1) _GDIPlus_GraphicsFillRect($hCtxt, 0, $iSquareSize, $iSquareSize, $iSquareSize, $hBrush1) _GDIPlus_GraphicsFillRect($hCtxt, $iSquareSize, $iSquareSize, $iSquareSize, $iSquareSize, $hBrush0) Local $hTexture = _GDIPlus_TextureCreate($hPatternBitmap) _GDIPlus_GraphicsDispose($hCtxt) _GDIPlus_BitmapDispose($hPatternBitmap) _GDIPlus_BitmapDispose($hBrush0) _GDIPlus_BitmapDispose($hBrush1) Return $hTexture EndFunc ;==>_CreatePatternTexture  
      GdipBitmapGetHistogram(), GdipBitmapGetHistogramSize() and 2 more GDI+ functions requires GDI+ v1.1 which means this will only run on Vista or higher operating systems.
      I hope the values are correct especially the value for luminosity.
      Br,
      UEZ
    • Pricehacker
      By Pricehacker
      Hello!
      Im wondering if it is possible to 'empty' the variable value to save memory, for example i often use variable as a onetime use thing and would prefer to 'forget' it after is is used
      Maybe it is just as easy as to setting $vVar = Null, but i wanted to make sure that this is the case
    • CarlD
      By CarlD
      Is there a reliable way to ensure that data assigned to variables in a script is overwritten or deleted when the script exits? I have scripts that encrypt/decrypt data and would like to ensure, if possible, that the encryption keys and decrypted data do not stay in memory after the script exits. Thanks.
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