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fielmann

GDIPLUS

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fielmann

Hello autoit friends,

how to read the pixels of a grafic? :)

I need soemthing like this:

#include <GDIPlus.au3>
    $x =     For $i = 1 to lastpixelofgrafik
         readpixel[$i]
    next

Can anybody send my an example? ;)

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fielmann

look at these in the help file

PixelSearch

PixelGetColor

PixelChecksum

Pixelsearch & Co. only works on screen ;)

I need a solution that works without on screen working :)

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Melba23

fielmann,

This script produces inverted images from screen grabs and existing bmps (I wrote it for an OCR project that worked better "white on black" than "black on white"). The Image_Invert function shows how to work on a GDI image one pixel at a time:

; Credit: Malkey for the basic GDI code

#include <GuiConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GDIPlus.au3>
#include <WinAPI.au3>
#Include <Color.au3>
#Include <ScreenCapture.au3>
#Include <Misc.au3>

Global $iTolerance = 30, $iX1, $iY1, $iX2, $iY2, $fType = ""

; Create GUI
$hMain_GUI = GUICreate("Invert BMP", 240, 150)

$hLabel_1 = GUICtrlCreateLabel("First mark the area to invert or select a BMP", 10, 10, 260, 20)

$hRect_Button   = GUICtrlCreateButton("Mark Area",   10, 40, 80, 30)
$hChoose_Button = GUICtrlCreateButton("Choose BMP", 150, 40, 80, 30)

$hLabel_2 = GUICtrlCreateLabel("", 160, 90, 70, 20)

$hAction_Button = GUICtrlCreateButton("Invert",      150,  110, 80, 30)
GUICtrlSetState(-1, $GUI_DISABLE)
$hCancel_Button = GUICtrlCreateButton("Cancel",   10, 110, 80, 30)

GUISetState()

While 1

    Switch GUIGetMsg()
        Case $GUI_EVENT_CLOSE, $hCancel_Button
            GUIDelete($hMain_GUI)
            Exit
        Case $hRect_Button
            GUISetState(@SW_HIDE, $hMain_GUI)
            Mark_Rect()
            GUISetState(@SW_SHOW, $hMain_GUI)
            GUICtrlSetState($hAction_Button, $GUI_ENABLE)
            GUICtrlSetData($hLabel_1, "")
            GUICtrlSetData($hLabel_2, "Now Invert!")
            $fType = "Rect"
        Case $hChoose_Button
            $sBMP_Path = FileOpenDialog("Select BMP to invert", "C:\", "Bitmaps (*.bmp)", 2)
            If @error Then
                MsgBox(64, "Info", "No BMP selected")
            Else
                GUICtrlSetState($hAction_Button, $GUI_ENABLE)
                GUICtrlSetData($hLabel_1, "")
                GUICtrlSetData($hLabel_2, "Now Invert!")
                $fType = "File"
            EndIf
        Case $hAction_Button
            GUIDelete($hMain_GUI)
            ExitLoop
    EndSwitch

WEnd

; Capture selected area if needed
If $fType = "Rect" Then
    $sBMP_Path = @ScriptDir & "\TestNormal.bmp"
    GUISetState(@SW_HIDE, $hMain_GUI)
    _ScreenCapture_Capture($sBMP_Path, $iX1, $iY1, $iX2, $iY2, False)
EndIf

; Load original image
_GDIPlus_Startup()
$hImage = _GDIPlus_ImageLoadFromFile($sBMP_Path)
If @error Then
    MsgBox(16, "Error", "Could not load BMP file")
    _GDIPlus_Shutdown()
    Exit
EndIf

Global $GuiSizeX = _GDIPlus_ImageGetWidth($hImage)
Global $GuiSizeY = _GDIPlus_ImageGetHeight($hImage)

; Display original image
$hBitmap_GUI = GUICreate("Original Bitmap", $GuiSizeX, $GuiSizeY, 100, 100)
GUISetState()

; Create Double Buffer, so the doesn't need to be repainted on PAINT-Event
$hGraphicGUI = _GDIPlus_GraphicsCreateFromHWND($hBitmap_GUI)
$hBMPBuff = _GDIPlus_BitmapCreateFromGraphics($GuiSizeX, $GuiSizeY, $hGraphicGUI)
$hGraphic = _GDIPlus_ImageGetGraphicsContext($hBMPBuff)

_GDIPlus_GraphicsDrawImageRect($hGraphic, $hImage, 0, 0, $GuiSizeX, $GuiSizeY)

GUIRegisterMsg(0xF, "MY_PAINT")
GUIRegisterMsg(0x85, "MY_PAINT")
_GDIPlus_GraphicsDrawImage($hGraphicGUI, $hBMPBuff, 0, 0)

; Invert the image
Local $hBitmap = Image_Invert($hBMPBuff, 0, 0, $GuiSizeX, $GuiSizeY)
If _GDIPlus_ImageSaveToFile($hBitmap, @ScriptDir & "\TestInverted.bmp") =  False Then MsgBox(16 , "Error", "Inverted image not created")

WinActivate($hBitmap_GUI)

; Display inverted image
$hInverted_GUI = GUICreate("Inverted Image", $GuiSizeX, $GuiSizeY, 500, 200)
$hPic = GUICtrlCreatePic(@ScriptDir & "\TestInverted.bmp", 0, 0, $GuiSizeX, $GuiSizeY)
GUISetState()

While 1
    If GUIGetMsg() = $GUI_EVENT_CLOSE Then
        _GDIPlus_GraphicsDispose($hGraphic)
        _GDIPlus_Shutdown()
        Exit
    EndIf
WEnd

; -------------

;Func to redraw on PAINT MSG
Func MY_PAINT($hWnd, $msg, $wParam, $lParam)

    ; Check, if the GUI with the Graphic should be repainted
    ; The sequencial order of these two commands is important.
    _GDIPlus_GraphicsDrawImage($hGraphicGUI, $hBMPBuff, 0, 0)
    _WinAPI_RedrawWindow($hBitmap_GUI, "", "", BitOR($RDW_INVALIDATE, $RDW_UPDATENOW, $RDW_FRAME)) ; , $RDW_ALLCHILDREN
    Return $GUI_RUNDEFMSG

EndFunc   ;==>MY_PAINT

; -------------

Func Image_Invert($hImage2, $iStartPosX = 0, $iStartPosY = 0, $GuiSizeX = Default, $GuiSizeY = Default)

    Local $hBitmap1, $Reslt, $width, $height, $stride, $format, $Scan0, $v_Buffer, $v_Value, $iIW, $iIH
    $iIW = _GDIPlus_ImageGetWidth($hImage2)
    $iIH = _GDIPlus_ImageGetHeight($hImage2)
    If $GuiSizeX = Default Or $GuiSizeX > $iIW - $iStartPosX Then $GuiSizeX = $iIW - $iStartPosX
    If $GuiSizeY = Default Or $GuiSizeY > $iIH - $iStartPosY Then $GuiSizeY = $iIH - $iStartPosY
    $hBitmap1 = _GDIPlus_BitmapCloneArea($hImage2, $iStartPosX, $iStartPosY, $GuiSizeX, $GuiSizeY, $GDIP_PXF32ARGB)

    ProgressOn("Inverting Image", "The image is being processed.", "0 percent", -1, -1, 16)

    $Reslt = _GDIPlus_BitmapLockBits($hBitmap1, 0, 0, $GuiSizeX, $GuiSizeY, BitOR($GDIP_ILMREAD, $GDIP_ILMWRITE), $GDIP_PXF32ARGB)

    ;Get the returned values of _GDIPlus_BitmapLockBits ()
    $width = DllStructGetData($Reslt, "width")
    $height = DllStructGetData($Reslt, "height")
    $stride = DllStructGetData($Reslt, "stride")
    $format = DllStructGetData($Reslt, "format")
    $Scan0 = DllStructGetData($Reslt, "Scan0")
    For $i = 0 To $GuiSizeX - 1
        For $j = 0 To $GuiSizeY - 1
            $v_Buffer = DllStructCreate("dword", $Scan0 + ($j * $stride) + ($i * 4))
            ; Get colour value of pixel
            $v_Value = DllStructGetData($v_Buffer, 1)
            ; Invert
            If (Abs(_ColorGetBlue ($v_Value) - 0x80) <= $iTolerance And _  ; Blue
                Abs(_ColorGetGreen($v_Value) - 0x80) <= $iTolerance And _  ; Green
                Abs(_ColorGetRed  ($v_Value) - 0x80) <= $iTolerance) Then  ; Red
                DllStructSetData($v_Buffer, 1, BitAND((0x7F7F7F + $v_Value) , 0xFFFFFF))
            Else
                DllStructSetData($v_Buffer, 1, BitXOR($v_Value ,0xFFFFFF))
            EndIf
        Next
        ProgressSet(Int(100 * $i / ($GuiSizeX)), Int(100 * $i / ($GuiSizeX)) & " percent")
    Next
    _GDIPlus_BitmapUnlockBits($hBitmap1, $Reslt)

    ProgressOff()
    Return $hBitmap1

EndFunc   ;==>Image_Invert

; -------------

Func Mark_Rect()

    Local $aMouse_Pos, $aMask, $aM_Mask, $iTemp
    Local $UserDLL = DllOpen("user32.dll")

    ; Wait until mouse button pressed
    While Not _IsPressed("01", $UserDLL)
        Sleep(10)
    WEnd

    ; Get first mouse position
    $aMouse_Pos = MouseGetPos()
    $iX1 = $aMouse_Pos[0]
    $iY1 = $aMouse_Pos[1]

    Global $hRectangle_GUI = GUICreate("", @DesktopWidth, @DesktopHeight, 0, 0, $WS_POPUP, $WS_EX_TOOLWINDOW + $WS_EX_TOPMOST)
    GUISetBkColor(0x000000)
    GUISetState()

    ; Draw rectangle while mouse button pressed
    While _IsPressed("01", $UserDLL)

        $aMouse_Pos = MouseGetPos()

        $aM_Mask = DllCall("gdi32.dll", "long", "CreateRectRgn", "long", 0, "long", 0, "long", 0, "long", 0)
        ; Bottom of rectangle
        $aMask = DllCall("gdi32.dll", "long", "CreateRectRgn", "long", $iX1, "long", $aMouse_Pos[1], "long", $aMouse_Pos[0], "long", $aMouse_Pos[1] + 1)
        DllCall("gdi32.dll", "long", "CombineRgn", "long", $aM_Mask[0], "long", $aMask[0], "long", $aM_Mask[0], "int", 2)
        ; Left of rectangle
        $aMask = DllCall("gdi32.dll", "long", "CreateRectRgn", "long", $iX1, "long", $iY1, "long", $iX1 + 1, "long", $aMouse_Pos[1])
        DllCall("gdi32.dll", "long", "CombineRgn", "long", $aM_Mask[0], "long", $aMask[0], "long", $aM_Mask[0], "int", 2)
        ; Top of rectangle
        $aMask = DllCall("gdi32.dll", "long", "CreateRectRgn", "long", $iX1 + 1, "long", $iY1 + 1, "long", $aMouse_Pos[0], "long", $iY1)
        DllCall("gdi32.dll", "long", "CombineRgn", "long", $aM_Mask[0], "long", $aMask[0], "long", $aM_Mask[0], "int", 2)
        ; Right of rectangle
        $aMask = DllCall("gdi32.dll", "long", "CreateRectRgn", "long", $aMouse_Pos[0], "long", $iY1, "long", $aMouse_Pos[0] + 1, "long", $aMouse_Pos[1])
        DllCall("gdi32.dll", "long", "CombineRgn", "long", $aM_Mask[0], "long", $aMask[0], "long", $aM_Mask[0], "int", 2)
        DllCall("user32.dll", "long", "SetWindowRgn", "hwnd", $hRectangle_GUI, "long", $aM_Mask[0], "int", 1)

        Sleep(50)

    WEnd

    ; Get second mouse position
    $iX2 = $aMouse_Pos[0]
    $iY2 = $aMouse_Pos[1]

    ; Set in correct order if required
    If $iX2 < $iX1 Then
        $iTemp = $iX1
        $iX1 = $iX2
        $iX2 = $iTemp
    EndIf
    If $iY2 < $iY1 Then
        $iTemp = $iY1
        $iY1 = $iY2
        $iY2 = $iTemp
    EndIf

    GUIDelete($hRectangle_GUI)
    DllClose($UserDLL)

EndFunc   ;==>Mark_Rect

I hope it helps you in your project. :)

M23


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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fielmann

@Melba23: seemed to be what I'm searching 4 :)

thx 4 great job B)

I will analyse deeper 2 transfer the content 4 my own script ;)

My project is to compare 2x grafics and get out the delta B)

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