GetPixel?

[Insolence]

http://msdn.microsoft.com/library/default....itmaps_0rho.asp

Can't get it to work. Also noticing I have to use 'long' when it says ptr/int etc. in the DLL thread in the dev section.

Global $Handle

Sleep(2000)
; Chang "test" to the window you'll be testing
PixelDrawConstructor( $Handle, "test" )

$GetPixel = GetPixel($Handle, 5, 5)

MsgBox ( "","",  $Handle[1] & "   -   " & $GetPixel[0])

Func PixelDrawConstructor(ByRef $DLLHandle, $WindowTitle)
   $DLLHandle = DllCall ("user32.dll", "int", "GetDC", "hwnd", WinGetHandle($WindowTitle, ""))
EndFunc

Func GetPixel($DLLHandle, $x, $y)
   return DllCall( "gdi32", "long", "GetPixel", "long", $DLLHandle[1], "long", $x, "long", $y )
EndFunc

[Insolence]

bump*

[Insolence]

bump AGAIN*!

[Blue_Drache]

bump AGAIN*!

<{POST_SNAPBACK}>

Perhaps a PM to the .dll god? *nudges Larry*

[Insolence]

Thanks. I have an entire period dedicated to programming now, I'll see if I can figure out the problem.

Thanks for clearing things up, once again.

EDIT:

Noticed you edited:

;Newer code below.

EDIT AGAIN:

Why am I using all these wrong data types? Are they even working?

I'm using what layer was using, which is blatantly different then the ones specified in the DLL Call thread in the dev section. Are those wrong?

Edited February 14, 2005 by Insolence

[Insolence]

expandcollapse popup

;===================================================================;
; Settings                                                       ;
;===================================================================;
Opt("WinTitleMatchMode", 2)

;===================================================================;
; Variables                                                     ;
;===================================================================;
Global $Handle

;===================================================================;
; Script                                                           ;
;===================================================================;
; Change to the window you'll be testing
DCConstructor ( $Handle, "SciTE" )

$GetPixel = GetPixel ( $Handle, 5, 5 )

MsgBox ( "", "", $Handle & "   -   " & $GetPixel )

DCDescructor ( $Handle, "SciTE" )

;===================================================================;
; Functions                                                     ;
;===================================================================;
Func DCConstructor ( ByRef $HDC, $WindowTitle )
    #CS 
    
        HDC GetDC(
          HWND hWnd   // handle to window
        );
        
    #CE
    
    $HDC = DllCall ("user32.dll", "ptr", "GetDC", "hwnd", WinGetHandle( $WindowTitle ) )
    $HDC = $HDC[0]
EndFunc  ;==>DCConstructor

Func GetPixel ( $HDC, $x, $y )
    #CS 
    
        COLORREF GetPixel(
          HDC hdc,  // handle to DC
          int nXPos,  // x-coordinate of pixel
          int nYPos   // y-coordinate of pixel
        );
        
    #CE
    
    Local $ret
    $ret = DllCall( "gdi32", "int", "GetPixel", "ptr", $HDC, "int", $x, "int", $y )
    Return $ret[0]
EndFunc  ;==>GetPixel

Func DCDescructor ( ByRef $HDC, $WindowTitle )
    #CS 
    
        int ReleaseDC(
          HWND hWnd,  // handle to window
          HDC hDC    // handle to DC
        );
    
    #CE
    
    $HDC = DllCall ( "user32.dll", "int", "ReleaseDC", "hwnd", WinGetHandle( $WindowTitle ), "ptr", $HDC )
EndFunc  ;==>DCDescructor

All I got so far... seems like the DC is getting set perfectly, as it returns a value.

[Insolence]

bump*

[Insolence]

Bumpage*

[Insolence]

Alright, thanks Lar-bear, I'll try that after school

expandcollapse popup

;===================================================================;
; Settings                                                       ;
;===================================================================;
Opt("WinTitleMatchMode", 2)

;===================================================================;
; Variables                                                     ;
;===================================================================;
Global $Handle

;===================================================================;
; Script                                                           ;
;===================================================================;
; Change to the window you'll be testing
DCConstructor ( $Handle, "SciTE" )

$GetPixel = GetPixel ( $Handle, 5, 5 )

MsgBox ( "", "", $Handle & "   -   " & $GetPixel )

DCDescructor ( $Handle, "SciTE" )

;===================================================================;
; Functions                                                     ;
;===================================================================;
Func DCConstructor ( ByRef $HDC, $WindowTitle )
    #CS 
    
        HDC GetDC(
          HWND hWnd   // handle to window
        );
        
    #CE
    
    $HDC = DllCall ("user32.dll", "ptr", "GetDC", "hwnd", WinGetHandle( $WindowTitle ) )
    $HDC = $HDC[0]
EndFunc  ;==>DCConstructor

Func GetPixel ( $HDC, $x, $y )
    #CS 
    
        COLORREF GetPixel(
          HDC hdc,  // handle to DC
          int nXPos,  // x-coordinate of pixel
          int nYPos   // y-coordinate of pixel
        );
        
    #CE
    
    Local $ret
    $ret = DllCall( "gdi32", "int", "GetPixel", "int", $HDC, "int", $x, "int", $y )
    Return $ret[0]
EndFunc  ;==>GetPixel

Func DCDescructor ( ByRef $HDC, $WindowTitle )
    #CS 
    
        int ReleaseDC(
          HWND hWnd,  // handle to window
          HDC hDC    // handle to DC
        );
    
    #CE
    
    $HDC = DllCall ( "user32.dll", "int", "ReleaseDC", "hwnd", WinGetHandle( $WindowTitle ), "ptr", $HDC )
EndFunc  ;==>DCDescructor

Returns -1

Edited February 17, 2005 by Insolence

[Insolence]

Alright, works now.

Cannot get pixels of an inactive window (I suppose that's good), damnit.