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DHL

Problems comparing two (in memory) bitmaps using memcmp

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DHL

Hi, 

I'm trying to compare two bitmaps (screenshots of the desktop) that I create using BitBlt. The bitmaps can be successfully saved to disk, but when I run the two bitmaps through a CompareBitmaps()-function I found in this thread, which calls memcmp, the script crashes with "Exit code: -1073741819". 

This crash only happens when I try to compare bitmaps that I got by using BitBlt. If I use the CompareBitmaps()-function on bitmaps created by _GDIPlus_ImageLoadFromFile, everything works fine. (I'm using AutoIT 3.3.6.1)

I'll attach my script that crashes, and the  CompareBitmaps() example script that works (which I got from the thread previosly mentioned)

My script, that for some reason crashes : 

#include <ScreenCapture.au3>
#include <GDIPlus.au3>
#include <WinAPI.au3>

_GDIPlus_Startup()

Local $hDesktop = _WinAPI_GetDesktopWindow()
$clientS = WinGetClientSize($hDesktop)
Local $Width = $clientS[0]
Local $Height = $clientS[1]

Local $hDC = _WinAPI_GetDC($hDesktop)
Local $memDC = _WinAPI_CreateCompatibleDC($hDC)
Local $memBmp = _WinAPI_CreateCompatibleBitmap($hDC, $Width, $Height)
_WinAPI_SelectObject ($memDC, $memBmp)
_WinAPI_BitBlt($memDC, 0, 0, $Width, $Height, $hDC, 0,0, $__SCREENCAPTURECONSTANT_SRCCOPY)
_WinAPI_DeleteDC($memDC)
_WinAPI_ReleaseDC($hDesktop, $hDC)

Local $hImage1 = _GDIPlus_BitmapCreateFromHBITMAP($memBmp)
_WinAPI_DeleteObject($memBmp)

_GDIPlus_ImageSaveToFile($hImage1, @ScriptDir & "\GDIPlus_Image1.jpg")

MsgBox(0, "Debug", "Screenshot taken & saved to disk. Ready to take new screenshot" )

Local $hDC2 = _WinAPI_GetDC($hDesktop)
Local $memDC2 = _WinAPI_CreateCompatibleDC($hDC2)
Local $memBmp2 = _WinAPI_CreateCompatibleBitmap($hDC2, $Width, $Height)
_WinAPI_SelectObject ($memDC2, $memBmp2)
_WinAPI_BitBlt($memDC2, 0, 0, $Width, $Height, $hDC2, 0,0, $__SCREENCAPTURECONSTANT_SRCCOPY)
_WinAPI_DeleteDC($memDC2)
_WinAPI_ReleaseDC($hDesktop, $hDC2)

Local $hImage2 =_GDIPlus_BitmapCreateFromHBITMAP($memBmp2)
_WinAPI_DeleteObject($memBmp2)

_GDIPlus_ImageSaveToFile($hImage2, @ScriptDir & "\GDIPlus_Image2.jpg")

MsgBox(0, "Debug", "Screenshot2 taken & saved to disk. Ready to compare images (from memory)" )

MsgBox(0, "bm1==bm2", CompareBitmaps($hImage1, $hImage2) )

; Clean up resources
_GDIPlus_ImageDispose($hImage1)
_GDIPlus_ImageDispose($hImage2)

; Shut down GDI+ library
_GDIPlus_ShutDown ()

Func CompareBitmaps($bm1, $bm2)

    $Bm1W = _GDIPlus_ImageGetWidth($bm1)
    $Bm1H = _GDIPlus_ImageGetHeight($bm1)

    $BitmapData1 = _GDIPlus_BitmapLockBits($bm1, 0, 0, $Bm1W, $Bm1H, $GDIP_ILMREAD, $GDIP_PXF32RGB)
    $Stride = DllStructGetData($BitmapData1, "Stride")
    $Scan0 = DllStructGetData($BitmapData1, "Scan0")

    $ptr1 = $Scan0
    $size1 = ($Bm1H - 1) * $Stride + ($Bm1W - 1) * 4
    $Bm2W = _GDIPlus_ImageGetWidth($bm2)
    $Bm2H = _GDIPlus_ImageGetHeight($bm2)
    $BitmapData2 = _GDIPlus_BitmapLockBits($bm2, 0, 0, $Bm2W, $Bm2H, $GDIP_ILMREAD, $GDIP_PXF32RGB)
    $Stride = DllStructGetData($BitmapData2, "Stride")
    $Scan0 = DllStructGetData($BitmapData2, "Scan0")
    $ptr2 = $Scan0
    $size2 = ($Bm2H - 1) * $Stride + ($Bm2W - 1) * 4

    $smallest = $size1
    If $size2 < $smallest Then $smallest = $size2
    $call = DllCall("msvcrt.dll", "int:cdecl", "memcmp", "ptr", $ptr1, "ptr", $ptr2, "int", $smallest)

    _GDIPlus_BitmapUnlockBits($bm1, $BitmapData1)
    _GDIPlus_BitmapUnlockBits($bm2, $BitmapData2)
    Return ($call[0]=0)
EndFunc  ;==>CompareBitmaps

 

Example Script (that basically does the same thing, but works fine)

#include <GDIPlus.au3>

_GDIPlus_Startup()
$fname1=FileOpenDialog("First image","","All images(*.bmp;*.jpg;*.png;)")
If $fname1="" Then Exit
$fname2=FileOpenDialog("Second image image","","All images(*.bmp;*.jpg;*.png;)")
If $fname2="" Then Exit
$bm1 = _GDIPlus_ImageLoadFromFile($fname1)
$bm2 = _GDIPlus_ImageLoadFromFile($fname2)

MsgBox(0, "bm1==bm2", CompareBitmaps($bm1, $bm2))
_GDIPlus_ImageDispose($bm1)
_GDIPlus_ImageDispose($bm2)
_GDIPlus_Shutdown()

Func CompareBitmaps($bm1, $bm2)

    $Bm1W = _GDIPlus_ImageGetWidth($bm1)
    $Bm1H = _GDIPlus_ImageGetHeight($bm1)
    $BitmapData1 = _GDIPlus_BitmapLockBits($bm1, 0, 0, $Bm1W, $Bm1H, $GDIP_ILMREAD, $GDIP_PXF32RGB)
    $Stride = DllStructGetData($BitmapData1, "Stride")
    $Scan0 = DllStructGetData($BitmapData1, "Scan0")

    $ptr1 = $Scan0
    $size1 = ($Bm1H - 1) * $Stride + ($Bm1W - 1) * 4


    $Bm2W = _GDIPlus_ImageGetWidth($bm2)
    $Bm2H = _GDIPlus_ImageGetHeight($bm2)
    $BitmapData2 = _GDIPlus_BitmapLockBits($bm2, 0, 0, $Bm2W, $Bm2H, $GDIP_ILMREAD, $GDIP_PXF32RGB)
    $Stride = DllStructGetData($BitmapData2, "Stride")
    $Scan0 = DllStructGetData($BitmapData2, "Scan0")

    $ptr2 = $Scan0
    $size2 = ($Bm2H - 1) * $Stride + ($Bm2W - 1) * 4

    $smallest = $size1
    If $size2 < $smallest Then $smallest = $size2
    $call = DllCall("msvcrt.dll", "int:cdecl", "memcmp", "ptr", $ptr1, "ptr", $ptr2, "int", $smallest)



    _GDIPlus_BitmapUnlockBits($bm1, $BitmapData1)
    _GDIPlus_BitmapUnlockBits($bm2, $BitmapData2)

    Return ($call[0]=0)


EndFunc  ;==>CompareBitmaps

 

Any one got a clue why my script crashes? 

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DHL

Trying a little bump. 

I still haven't figured out why the second script works fine and the first doesn't.

They both call 

DllCall("msvcrt.dll", "int:cdecl", "memcmp", "ptr", $ptr1, "ptr", $ptr2, "int", $smallest)

The main difference is that the second script get the bitmap-handles from

$bm1 = _GDIPlus_ImageLoadFromFile($fname1)

while the first (which crashes) acquires the bitmap-handles using BitBlt and these lines:

Local $hDC = _WinAPI_GetDC($hDesktop)
Local $memDC = _WinAPI_CreateCompatibleDC($hDC)
Local $memBmp = _WinAPI_CreateCompatibleBitmap($hDC, $Width, $Height)
_WinAPI_SelectObject ($memDC, $memBmp)
_WinAPI_BitBlt($memDC, 0, 0, $Width, $Height, $hDC, 0,0, $__SCREENCAPTURECONSTANT_SRCCOPY)
_WinAPI_DeleteDC($memDC)
_WinAPI_ReleaseDC($hDesktop, $hDC)

Local $hImage1 = _GDIPlus_BitmapCreateFromHBITMAP($memBmp)

Anyone who can point me in the right direction on how to solve this problem? 

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DHL

Yeah, I agree it must be crashing because of some type mismatch.

However, shouldn't 

_GDIPlus_BitmapCreateFromHBITMAP($memBmp)

and 

_GDIPlus_ImageLoadFromFile($fname1)

both return a handle to a bitmap object ?

It seems so by the docs. What am I missing?

https://www.autoitscript.com/autoit3/docs/libfunctions/_GDIPlus_BitmapCreateFromHBITMAP.htm

https://www.autoitscript.com/autoit3/docs/libfunctions/_GDIPlus_ImageLoadFromFile.htm

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junkew

As doc states one returns a bitmap object and the other an image object. So not both returning bitmap object as you state.

Bitmap class inherits from image I think. Maybe this function can convert.

https://msdn.microsoft.com/en-us/library/dd183485(VS.85).aspx

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junkew

Its a while ago but maybe this one helps

https://www.autoitscript.com/autoit3/docs/libfunctions/_GDIPlus_BitmapCreateFromMemory.htm

and long ago I made this one

 

in that reference you see

If $BMPFile="SCREEN" Then
        $hbScreen=_ScreenCapture_Capture("",0,0,-1,-1,False)
        $pBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hbScreen); returns memory bitmap
    Else
;try to get a handle
        $handle = WinGetHandle($BMPFile)
        If @error Then
;Assume its an unknown handle so correct filename should be given
            $pBitmap = _GDIPlus_BitmapCreateFromFile($BMPFile)
        Else
            $hbScreen=_ScreenCapture_CaptureWnd("",$handle,0,0,-1,-1,False)
            $pBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hbScreen); returns memory bitmap
        EndIf
    EndIf

 

Edited by junkew

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UEZ

Try this function instead:

Func _GDIPlus_ImageCompare($hImage1, $hImage2, $bFastCmp = True)
    Local Const $iW = _GDIPlus_ImageGetWidth($hImage1), $iH = _GDIPlus_ImageGetHeight($hImage1)
    If ($iW <> _GDIPlus_ImageGetWidth($hImage2)) Then Return SetError(1, 0, 0)
    If ($iH <> _GDIPlus_ImageGetHeight($hImage2)) Then Return SetError(2, 0, 0)
    Local $t = TimerInit()
    Local $tBitmapData1 = _GDIPlus_BitmapLockBits($hImage1, 0, 0, $iW, $iH, $GDIP_ILMREAD, $GDIP_PXF32ARGB)
    Local $tBitmapData2 = _GDIPlus_BitmapLockBits($hImage2, 0, 0, $iW, $iH, $GDIP_ILMREAD, $GDIP_PXF32ARGB)

    Local $iScan1 = DllStructGetData($tBitmapData1, "Scan0")
    Local $tPixel1 = DllStructCreate("int[" & $iW * $iH & "];", $iScan1)
    Local $iStride = Abs(DllStructGetData($tBitmapData1, "Stride"))

    Local $iScan2 = DllStructGetData($tBitmapData2, "Scan0")
    Local $tPixel2 = DllStructCreate("int[" & $iW * $iH & "];", $iScan2)

    If $bFastCmp Then
        $iResult = DllCall("msvcrt.dll", "int:cdecl", "memcmp", "ptr", $iScan1, "ptr", $iScan2, "int", ($iH - 1) * $iStride + ($iW - 1) * 4)[0]
    Else
        Local $iX, $iY, $iRowOffset, $iPixel1, $iPixel2, $aDiff[$iW * $iH + 1][3], $c = 1
        For $iY = 0 To $iH - 1
            $iRowOffset = $iY * $iW + 1
            For $iX = 0 To $iW - 1
                $iPixel1 = DllStructGetData($tPixel1, 1, $iRowOffset + $iX) ;get pixel color
                $iPixel2 = DllStructGetData($tPixel2, 1, $iRowOffset + $iX) ;get pixel color
                If $iPixel1 <> $iPixel2 Then
                    $aDiff[$c][0] = $iX & ", " & $iY
                    $aDiff[$c][1] = "0x" & Hex($iPixel1, 8)
                    $aDiff[$c][2] = "0x" & Hex($iPixel2, 8)
                    $c += 1
                EndIf
            Next
        Next
        $aDiff[0][0] = TimerDiff($t)
        $aDiff[0][1] = $iW
        $aDiff[0][2] = $iH
    EndIf

    _GDIPlus_BitmapUnlockBits($hImage1, $tBitmapData1)
    _GDIPlus_BitmapUnlockBits($hImage2, $tBitmapData2)

    If $bFastCmp Then Return SetError(0, Int(TimerDiff($t)), $iResult = 0)

    ReDim $aDiff[$c][3]
    Return $aDiff
EndFunc

 

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DHL

Thanks for pointing out that one returns a bitmap object and the other an image object, @junkew. I'm not really sure what the difference between those two are, but I guess they are different GDI+ objects.

I tried replacing the compare function in my code with @UEZ's _GDIPlus_ImageCompare and it just worked. I didn't have to do any "bitmap-object to image-object"-juggling. Amazing stuff and lightning fast. Thank you so much.

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      ;coded by UEZ build 2018-09-25 beta #include <APISysConstants.au3> #include <Array.au3> #include <GDIPlus.au3> #include <GUIConstantsEx.au3> #include <WinAPIGdi.au3> #include <WinAPISysWin.au3> #include <WindowsConstants.au3> Global $__g_hGUI_MarkArea, $__g_hGUI_Bg, $__g_iLabel_TL, $__g_iLabel_TM, $__g_iLabel_TR, $__g_iLabel_LM, $__g_iLabel_RM, $__g_iLabel_BL, $__g_iLabel_BM, _ $__g_iLabel_BR, $__g_iOldCursor, $__g_iW, $__g_iH, $__g_iColor_ResizeDots = 0xFFFFFF, $__g_iBorder = 4, $__g_bSelectionDone = False Global $aRect = _GDIPlus_MarkScreenRegionAnimated() _ArrayDisplay($aRect, "Marked area coordinates") Func _GDIPlus_MarkScreenRegionAnimated($bAnim = True) _GDIPlus_Startup() Local Const $hFullScreen = WinGetHandle("[TITLE:Program Manager;CLASS:Progman]") Local Const $aFullScreen = WinGetPos($hFullScreen) $__g_hGUI_Bg = GUICreate("", $aFullScreen[2], $aFullScreen[3], $aFullScreen[0], $aFullScreen[1], BitOR($WS_CLIPCHILDREN, $WS_POPUP), $WS_EX_TOPMOST) ;to avoid cursor flickering and for proper control read WinSetTrans($__g_hGUI_Bg, "", 0x01) $__g_hGUI_MarkArea = GUICreate("", 1, 1, -1, -1, $bAnim ? $WS_POPUP : BitOR($WS_POPUP, $WS_BORDER), BitOR($WS_EX_TOPMOST, $WS_EX_LAYERED), $__g_hGUI_Bg) GUISetBkColor(0xABCDEF, $__g_hGUI_MarkArea) If Not $bAnim Then $__g_iColor_ResizeDots = 0xFF0000 $__g_iLabel_TL = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;top left GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_TM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;top mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_TR = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;top right GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_LM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;left mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_RM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;right mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_BL = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;bottom left GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_BM = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;bottom mid GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) $__g_iLabel_BR = GUICtrlCreateLabel("", 0, 0, $__g_iBorder, $__g_iBorder) ;bottom right GUICtrlSetResizing(-1, $GUI_DOCKSIZE) GUICtrlSetBkColor(-1, $__g_iColor_ResizeDots) GUISetState(@SW_SHOWNA, $__g_hGUI_Bg) GUISetState(@SW_SHOW, $__g_hGUI_MarkArea) $__g_iOldCursor = MouseGetCursor() GUISetCursor(3, 1, $__g_hGUI_Bg) GUISetCursor(3, 1, $__g_hGUI_MarkArea) _WinAPI_SetLayeredWindowAttributes($__g_hGUI_MarkArea, 0xABCDEF, 0xF0) Local $aMPos, $aPrevMPos[2] = [MouseGetPos(0) + 1, MouseGetPos(1) + 1], $iID, $aCI, $iX, $iY, $aOldWinPos, $aOldMPos, $bMoved Do Switch GUIGetMsg() Case $GUI_EVENT_CLOSE If $bAnim Then GUIRegisterMsg($WM_TIMER, "") DllCall("user32.dll", "bool", "KillTimer", "hwnd", $__g_hGUI_MarkArea, "uint_ptr", $iID) GUIRegisterMsg($WM_ERASEBKGND, "") EndIf _GDIPlus_Shutdown() Local $aResult = WinGetPos($__g_hGUI_MarkArea) $aResult[2] = WinGetClientSize($__g_hGUI_MarkArea)[0] $aResult[3] = WinGetClientSize($__g_hGUI_MarkArea)[1] GUIDelete($__g_hGUI_MarkArea) GUIDelete($__g_hGUI_Bg) Return $aResult EndSwitch $aMPos = MouseGetPos() If ($aMPos[0] <> $aPrevMPos[0] Or $aMPos[1] <> $aPrevMPos[1]) And (Not $__g_bSelectionDone) Then WinMove($__g_hGUI_MarkArea, "", $aMPos[0], $aMPos[1]) $aPrevMPos = $aMPos EndIf $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) If $aCI[2] And (Not $__g_bSelectionDone) Then $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) If $bAnim Then GUIRegisterMsg($WM_ERASEBKGND, "WM_ERASEBKGND") GUIRegisterMsg($WM_TIMER, "PlayBorderAnim") $iID = DllCall("User32.dll", "uint_ptr", "SetTimer", "hwnd", $__g_hGUI_MarkArea, "uint_ptr", 1, "uint", 50, "ptr", 0)[0] EndIf While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) $aMPos = MouseGetPos() $__g_iW = Abs($aMPos[0] - $aGUIStartPos[0]) + 1 $__g_iH = Abs($aMPos[1] - $aGUIStartPos[1]) + 1 If $aMPos[0] < $aGUIStartPos[0] Then $iX = $aMPos[0] Else $iX = $aGUIStartPos[0] EndIf If $aMPos[1] < $aGUIStartPos[1] Then $iY = $aMPos[1] Else $iY = $aGUIStartPos[1] EndIf WinMove($__g_hGUI_MarkArea, "", $iX, $iY, $__g_iW, $__g_iH) UpdateCtrlPos($bAnim) WEnd $__g_bSelectionDone = True GUISetCursor(3, 1, $__g_hGUI_MarkArea) ElseIf $aCI[3] And $__g_bSelectionDone Then $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) If _WinAPI_PtInRectEx(MouseGetPos(0), MouseGetPos(1), $aGUIStartPos[0], $aGUIStartPos[1], $aGUIStartPos[0] + $aGUIStartPos[2], $aGUIStartPos[1] + $aGUIStartPos[3]) Then $aMPos = MouseGetPos() $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) While $aCI[3] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aGUIStartPos[0] - ($aMPos[0] - MouseGetPos(0)), $aGUIStartPos[1] - ($aMPos[1] - MouseGetPos(1)), $__g_iW, $__g_iH) GUISetCursor(0, 1, $__g_hGUI_Bg) GUISetCursor(0, 1, $__g_hGUI_MarkArea) WEnd GUISetCursor(3, 1, $__g_hGUI_Bg) GUISetCursor(3, 1, $__g_hGUI_MarkArea) EndIf EndIf If $__g_bSelectionDone Then $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) If @error Then ContinueLoop Switch $aCI[4] Case $__g_iLabel_TL GUISetCursor(12, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", MouseGetPos(0), MouseGetPos(1), $aOldWinPos[2] + ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] + ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_BR GUISetCursor(12, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], $aOldWinPos[1], $aOldWinPos[2] - ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] - ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_TR GUISetCursor(10, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], MouseGetPos(1), $aOldWinPos[2] - ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] + ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_BL GUISetCursor(10, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", MouseGetPos(0), $aOldWinPos[1], $aOldWinPos[2] + ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3] - ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_LM GUISetCursor(13, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", MouseGetPos(0), $aOldWinPos[1], $aOldWinPos[2] + ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3]) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_RM GUISetCursor(13, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], $aOldWinPos[1], $aOldWinPos[2] - ($aOldMPos[0] - MouseGetPos(0)), $aOldWinPos[3]) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_TM GUISetCursor(11, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], MouseGetPos(1), $aOldWinPos[2], $aOldWinPos[3] + ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case $__g_iLabel_BM GUISetCursor(11, 1, $__g_hGUI_MarkArea) If $aCI[2] Then $aOldWinPos = WinGetPos($__g_hGUI_MarkArea) $aOldMPos = MouseGetPos() While $aCI[2] * Sleep(10) $aCI = GUIGetCursorInfo($__g_hGUI_MarkArea) WinMove($__g_hGUI_MarkArea, "", $aOldWinPos[0], $aOldWinPos[1], $aOldWinPos[2], $aOldWinPos[3] - ($aOldMPos[1] - MouseGetPos(1))) WEnd UpdateCtrlPos($bAnim) EndIf Case Else GUISetCursor(3, 1, $__g_hGUI_MarkArea) EndSwitch EndIf Until False EndFunc ;==>_GDIPlus_MarkScreenRegionAnimated Func UpdateCtrlPos($bAnim = True) Local Const $aGUIStartPos = WinGetPos($__g_hGUI_MarkArea) If $__g_bSelectionDone And $bAnim Then GUIRegisterMsg($WM_TIMER, "") $__g_iW = $aGUIStartPos[2] $__g_iH = $aGUIStartPos[3] ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_TL, 0, 0, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_TM, ($__g_iW - $__g_iBorder) / 2, 0, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_TR, ($__g_iW - $__g_iBorder - $__g_iBorder / 2), 0, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_LM, 0, ($__g_iH - $__g_iBorder) / 2, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_RM, ($__g_iW - $__g_iBorder - $__g_iBorder / 2), ($__g_iH - $__g_iBorder) / 2, $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_BL, 0, ($__g_iH - $__g_iBorder - $__g_iBorder / 2), $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_BM, ($__g_iW - $__g_iBorder) / 2, ($__g_iH - $__g_iBorder - $__g_iBorder / 2), $__g_iBorder, $__g_iBorder) ControlMove($__g_hGUI_MarkArea, "", $__g_iLabel_BR, ($__g_iW - $__g_iBorder - $__g_iBorder / 2), ($__g_iH - $__g_iBorder - $__g_iBorder / 2), $__g_iBorder, $__g_iBorder) If $__g_bSelectionDone And $bAnim Then GUIRegisterMsg($WM_TIMER, "PlayBorderAnim") EndFunc ;==>UpdateCtrlPos Func PlayBorderAnim() Local $aWinPos = WinGetClientSize($__g_hGUI_MarkArea), $iW = $aWinPos[0], $iH = $aWinPos[1] Local Static $fOffset = 0 Local Const $iSize = $__g_iBorder / 2 Local Const $hDC = _WinAPI_GetDC($__g_hGUI_MarkArea) Local Const $hHBitmap = _WinAPI_CreateCompatibleBitmap($hDC, $iW, $iH) Local Const $hDC_backbuffer = _WinAPI_CreateCompatibleDC($hDC) Local Const $DC_obj = _WinAPI_SelectObject($hDC_backbuffer, $hHBitmap) Local Const $hCanvas = _GDIPlus_GraphicsCreateFromHDC($hDC_backbuffer) Local Const $hPen = _GDIPlus_PenCreate(0xFF0178D7, $iSize), $hPen2 = _GDIPlus_PenCreate(0xFFFFFFFF, $iSize), _ $hBrush = _GDIPlus_BrushCreateSolid(0xFF000000 + $__g_iColor_ResizeDots), $hPen3 = _GDIPlus_PenCreate(0xFF000000) _GDIPlus_PenSetDashStyle($hPen, $GDIP_DASHSTYLEDASHDOT) _GDIPlus_GraphicsClear($hCanvas, 0xFFABCDEF) ;for faster performance direct dll calls DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen2, "float", 1 + $iSize, "float", 1 + $iSize, "float", $iW - 2 * $iSize - 2, "float", $iH - 2 * $iSize - 2) DllCall($__g_hGDIPDll, "int", "GdipSetPenDashOffset", "handle", $hPen, "float", $fOffset) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen, "float", 1 + $iSize, "float", 1 + $iSize, "float", $iW - 2 * $iSize - 2, "float", $iH - 2 * $iSize - 2) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) / 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) / 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", 0, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) / 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) / 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) _WinAPI_BitBlt($hDC, 0, 0, $iW, $iH, $hDC_backbuffer, 0, 0, $SRCCOPY) $fOffset += 0.5 _GDIPlus_GraphicsDispose($hCanvas) _WinAPI_SelectObject($hDC_backbuffer, $DC_obj) _WinAPI_DeleteDC($hDC_backbuffer) _WinAPI_DeleteObject($hHBitmap) _WinAPI_ReleaseDC($__g_hGUI_MarkArea, $hDC) _GDIPlus_PenDispose($hPen) _GDIPlus_PenDispose($hPen2) _GDIPlus_PenDispose($hPen3) _GDIPlus_BrushDispose($hBrush) EndFunc ;==>PlayBorderAnim Func WM_ERASEBKGND($hWnd, $iMsgm, $wParam, $lParam) ;suppress repainting to avoid flickering but causes some other side effects #forceref $iMsgm, $wParam, $lParam Local Const $hBrush = _WinAPI_CreateSolidBrush(0xEFCDAB) ;BGR format ;~ _WinAPI_RedrawWindow($__g_hGUI_MarkArea, 0, 0, BitOR($RDW_NOERASE, $RDW_NOCHILDREN, $RDW_NOFRAME, $RDW_VALIDATE)) _WinAPI_SetClassLongEx($__g_hGUI_MarkArea, $GCL_HBRBACKGROUND, $hBrush) _WinAPI_DeleteObject($hBrush) Return 0 EndFunc ;==>WM_ERASEBKGND  
      Just press the lmb and move your mouse. When lmb is released you can adjust the size of the window by dragging the white rectangle to any direction. Rmb will move the marked area.
      Press ESC to get the coordinates of the marked region.
      If you have any improvements, please post it here.
       
      Tested on Win10 x64 only.
       
    • Sven-Seyfert
      By Sven-Seyfert
      Hi Community,

      I'm looking for a way to do a Video Overlay GUI or something like that. The idea is to create a GUI which plays a video loop (with transparency/alpha channel) in front of an other GUI. Before you asking why - because I don't believe that GDIPlus can do it out of the box. My skillset for that kind of graphical things isn't good enough to do that, but here are some specialist like @UEZ maybe who can help.

      Example alpha channel video (visualized as animated *.gif):

      I tried to do the light rays effect directly with GDIPlus, but honestly that's a bit too difficult for me. I would be very glad and grateful if there are some suggestions, ideas or recommendations.

      Code for the Video play:
       
      Example video "End.mpeg":
       
      The next challenge is that the overlay GUI should be not clickable. If I hover over the overlay area, I want to have the possibility to control the GUI or what ever, in the background. But if there is any chance to make it with GDIPlus as a Video Overlay for light rays, I would prefer that approach instead of my crazy work-around idea.

      Thanks for any suggestion - I'm grateful!
      Sven
    • c.haslam
      By c.haslam
      I had thought that _GDIPlus_ImageClone($hImage) removes all property items, but I now know that it copies property items.
      What is the easiest way of copying an image that has property items to another image that does not have property items?
    • c.haslam
      By c.haslam
      I think that _GDIPlus_ImageGetPropertyItem should return a Property Item that can readily be set as a property of another image. Why would one want to do this? A script might (as one of mine does) edit an image of a .jpg file then write the result to a .jpg file. In editing it, in my case, the number of horizontal and vertical pixels change, and the date/time edited should be set as a property. All other property items remain the same. Other GDI+ users may change other properties.
      So an approach is to copy all the property items from image1 to image2, then update a few properties.
      M$ provides a Property Item class (id, length, pointer to an array of values) but _GDIPlus_ImageGetPropertyItem returns something different.
      I think that, wherever reasonable, UDFs that are wrappers for M$ methods should work like M$'s methods. _GDIPlus_ImageGetPropertyItem does not do this:
      While M$ returns 2 values for a value that is a ratio of 2 numbers,  _GDIPlus_ImageGetPropertyItem returns numerator/denominator as a single value (often a Double). _GDIPlus_ImageSetPropertyItem (when included in GDIPlus.au3) will be unable to set ratio property items properly because it cannot know what the numerator and denominator are. So copying such property items will not work properly. M$ has a Void* buffer where the buffer is an array of values but _GDIPlus_ImageGetPropertyItem() returns the values in the same 1-d array as id, length and type. M$'s approach produces a 1-d array with the same number of elements for all property items while _GDIPlus_ImageGetPropertyItem produces a 1-d array with various numbers of elements. To me, this is not good programming practice. For a photo from a Sony camera, the worst case has 1-d array with 67 elements. When combined into a 2-d array with the property items of all properties, there are 66 rows and 67 columns, with many elements not used. So I suggest that _GDIPlus_ImageGetPropertyItem look like this:
      ; #FUNCTION# ==================================================================================================================== ; Name ..........: cGDIPlus_ImageGetPropertyItem ; Description ...: Gets a specified property item (piece of meta data) from an Image object ; Syntax ........: cGDIPlus_ImageGetPropertyItem($hImage, $iPropID) ; Parameters ....: $hImage - Pointer to an image object ; $iPropID - Identifier of the property item to be retrieved ; Return values .: Success: Array containing the values of the property item ; [0] - identifier ; [1] - size, in bytes, of the value array ; [2] - type of value(s) in the value array ; [3] - value array ; Failure: Sets the @error flag to non-zero, @extended may contain GPSTATUS error code ($GPID_ERR*). ; Author ........: Eukalyptus ; Modified ......: c.haslam ; Remarks .......: types: unsigned byte = 1, ASCII string = 2, unsigned short = 3, unsigned long = 4, ; unsinged rational = 5, undefined = 7, signed long = 9, signed rational = 10 ; Related .......: _GDIPlus_ImageGetPropertyIdList ; Link ..........: https://msdn.microsoft.com/en-us/library/windows/desktop/ms535390(v=vs.85).aspx, ; https://msdn.microsoft.com/en-us/library/windows/desktop/ms534493(v=vs.85).aspx, ; https://msdn.microsoft.com/en-us/library/windows/desktop/ms534414(v=vs.85).aspx ; Example .......: Yes ; =============================================================================================================================== Func cGDIPlus_ImageGetPropertyItem($hImage, $iPropID) Local $iSize = __GDIPlus_ImageGetPropertyItemSize($hImage, $iPropID) If @error Then Return SetError(@error, @extended, -1) Local $tBuffer = DllStructCreate("byte[" & $iSize & "];") Local $pBuffer = DllStructGetPtr($tBuffer) Local $aResult = DllCall($__g_hGDIPDll, "int", "GdipGetPropertyItem", "handle", $hImage, "uint", _ $iPropID, "uint", $iSize, "struct*", $tBuffer) If @error Then Return SetError(@error, @extended, -1) If $aResult[0] Then Return SetError(10, $aResult[0], False) Local $tPropertyItem = DllStructCreate("int id; int length; short type; ptr pvalue;", $pBuffer) Local $iBytes = DllStructGetData($tPropertyItem, "length") Local $pValue = DllStructGetData($tPropertyItem, "pvalue") Local $aRet[4] Local $type = DllStructGetData($tPropertyItem,'type') Local $tValues, $iValues Switch $type Case 2 ;ASCII String $iValues = 1 $tValues = DllStructCreate("char[" & $iBytes & "];", $pValue) Case 3 ;Array of UShort $iValues = Int($iBytes / 2) $tValues = DllStructCreate("ushort[" & $iValues & "];", $pValue) Case 4, 5 ;Array of UInt / Fraction $iValues = Int($iBytes / 4) $tValues = DllStructCreate("uint[" & $iValues & "];", $pValue) Case 9, 10 ;Array of Int / Fraction $iValues = Int($iBytes / 4) $tValues = DllStructCreate("int[" & $iValues & "];", $pValue) Case Else ;Array of Bytes $iValues = 1 $tValues = DllStructCreate("byte[" & $iBytes & "];", $pValue) EndSwitch $aRet[0] = DllStructGetData($tPropertyItem,'id') $aRet[1] = $iBytes $aRet[2] = $type Local $aVals[$iValues] If $type=2 Or $type=7 Then ; ASCII string or undefined $aVals[0] = DllStructGetData($tValues,1) Else For $i = 0 To $iValues-1 $aVals[$i] = DllStructGetData($tValues,1,$i+1) Next EndIf $aRet[3] = $aVals Return $aRet EndFunc And here is an example:
      #include <GDIPlus.au3> #include <Array.au3> Example() Func Example() _GDIPlus_Startup() Local $hImage = _GDIPlus_ImageLoadFromFile(RegRead((@AutoItX64 = True ? "HKLM\SOFTWARE\Wow6432Node\AutoIt v3\AutoIt" : "HKLM\SOFTWARE\AutoIt v3\AutoIt"), "InstallDir") & "\Examples\GUI\Torus.png") If @error Then _GDIPlus_Shutdown() MsgBox(16, "", "An error has occured - unable to load image!", 30) Return False EndIf Local $ar = _GDIPlus_ImageGetPropertyIdList($hImage) Local $vPropNbrs[UBound($ar,1)-1] ; Extract ID numbers For $i = 1 To UBound($ar,1)-1 $vPropNbrs[$i-1] = $ar[$i][0] Next ; Get all property items Local $aPropItems[UBound($vPropNbrs)][4],$vPropItem For $i = 0 To UBound($vPropNbrs)-1 $vPropItem = cGDIPlus_ImageGetPropertyItem($hImage,$vPropNbrs[$i]) For $j = 0 To 3 $aPropItems[$i][$j] = $vPropItem[$j] Next Next ; Collapse values arrays so _ArrayDisplay can display them Local $ar = $aPropItems For $i = 0 To UBound($aPropItems,1)-1 $ar[$i][0] = '0x'&Hex($ar[$i][0],4) $ar[$i][3] = '' For $j = 0 To UBound($aPropItems[$i][3])-1 $ar[$i][3] &= ($aPropItems[$i][3])[$j]&'|' Next $ar[$i][3] = StringTrimRight($ar[$i][3],1) Next _ArrayDisplay($ar) _GDIPlus_Shutdown() EndFunc Unfortunately this example (based on one now in the Help) does not exercise most of the item types, but I do not know of a file with EXIF metadata that is on most PCs. I have tested this code by updating and adding property items to torus.jpg and to a photo taken by a Sony camera. The code for implementing and calling _GDIPlus_ImageSetPropertyItem will be fairly simple [see below].
       
      Your thoughts?
       
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