How to create modified _ScreenCapture_CaptureWnd() (help request for experts)

[E1M1]

See my last reply.

How can I create modified version of _ScreenCapture_CaptureWnd(). I want modify that function so instead of saving image to file it would return image.I know how find the ScreenCapture.au3, but I don't know how and what I need to modify.In ScreenCapture.au3 function _ScreenCapture_CaptureWnd() call next functions, and those call next ones, and so on, also there are many commands, functions that I haven't used yet, so I have no experience with these commands.

I need to create _ScreenCapture_CaptureWnd() that returns binary string (it can also be hex code it doesn't matter) instead of saving image.Most important thing is that I need _ScreenCapture_CaptureWnd() that returns image, it must not save image to disk.

I also need function to display image in GUI.As we all know GUICtrlCreatePic() requires file,But I need special function that loads image from binary string.

Idea is that if I don't save image to hard disk, I don't have to waste time on writing image disk, and then reading it from disk.If I need to update image of window in my GUI about 10 times/sec, Hard disk must do lot's of work.That's the reason why I need CaptureScreen function that returns image as string,and _GuiCtrlCreateX function that loads image to GUI picture control with out saving it to hard disk.

If you know how to do that or if u can suggest me what to edit in original functions, please let me know.

Thanks.

Edited June 1, 2009 by E1M1

[Authenticity]

Look here for executefrommem using the binary form of the image file.

About _ScreenCapture_CaptureWnd(), if you'll specify a blank string in the first parameter you'll get a bitmap handle instead of saving it to a file. Read the function parameter explanations.

Edited May 29, 2009 by Authenticity

[E1M1]

How I get image from handle?

screenshot ends with code that I don't understand well.

$aResult = DllCall($ghGDIPDll, "int", "GdipSaveImageToFile", "hwnd", $hImage, "wstr", $sFileName, "ptr", $pGUID, "ptr", $pParams)

[Zedna]

Look here at 

_SetImageBinaryToCtrl($CtrlId, ByRef $Binary)

_SetMemoryImageToCtrl($CtrlId, $Pointer, $nSize)

http://www.autoitscript.com/forum/index.ph...st&p=519858

Edited May 29, 2009 by Zedna

[E1M1]

thanks Zenda, But I still need function to get string from image's handle, How I do that?

_ScreenCapture_CaptureWnd() returns handle, but handle is not enough, I need my string!

[Malkey]

How can I create modified version of _ScreenCapture_CaptureWnd(). I want modify that function so instead of saving image to file it would return image.I know how find the ScreenCapture.au3, but I don't know how and what I need to modify.In ScreenCapture.au3 function _ScreenCapture_CaptureWnd() call next functions, and those call next ones, and so on, also there are many commands, functions that I haven't used yet, so I have no experience with these commands.

I need to create _ScreenCapture_CaptureWnd() that returns binary string (it can also be hex code it doesn't matter) instead of saving image.Most important thing is that I need _ScreenCapture_CaptureWnd() that returns image, it must not save image to disk.

I also need function to display image in GUI.As we all know GUICtrlCreatePic() requires file,But I need special function that loads image from binary string.

Idea is that if I don't save image to hard disk, I don't have to waste time on writing image disk, and then reading it from disk.If I need to update image of window in my GUI about 10 times/sec, Hard disk must do lot's of work.That's the reason why I need CaptureScreen function that returns image as string,and _GuiCtrlCreateX function that loads image to GUI picture control with out saving it to hard disk.

If you know how to do that or if u can suggest me what to edit in original functions, please let me know.

Thanks.

There may be a few commands in this script you have no used before.

Your requirement of 10 screen captures per second intrigued me. I didn't think it could be done with _ScreenCapture_Capture().

The bigger the screen capture, the less number of screen captures per second.

With a capture size of 600x500, this script displays to a GUI in less than 0.100 secs most of the time.

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;
#include <gdiplus.au3>
#include <WindowsConstants.au3>
#include <ScreenCapture.au3>

; Example modified from
; http://www.autoitscript.com/forum/index.php?s=&showtopic=89879&view=findpost&p=647719
; http://www.autoitscript.com/forum/index.php?s=&showtopic=90230&view=findpost&p=648803

Opt("GUIOnEventMode", 1)

Global Const $Width = 600; @DesktopWidth
Global Const $Height = 500;@DesktopHeight-30
Global Const $PI = 3.14159265
Local $hImage, $hBitmap1
$hWnd = GUICreate("Screen Capture", $Width, $Height, -1, -1, -1, $WS_EX_TOPMOST)
WinSetTrans("Screen Capture", "", 254)
GUISetOnEvent(-3, "close")
GUISetOnEvent(0xF, "MY_PAINT")
_GDIPlus_Startup()

$hGraphics = _GDIPlus_GraphicsCreateFromHWND($hWnd)
$hBitmap = _GDIPlus_BitmapCreateFromGraphics($Width, $Height, $hGraphics)
$hBackbuffer = _GDIPlus_ImageGetGraphicsContext($hBitmap)
$ScreenDc = _WinAPI_GetDC($hWnd)

GUISetState()
;_GDIPlus_GraphicsClear($hBackbuffer, 0xFFFFFFFF)

$hBitmap1 = _ScreenCapture_Capture("", 0, 0, $Width, $Height, False)
$hImage1 = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap1)
_GDIPlus_GraphicsDrawImage($hBackbuffer, $hImage1, 0, 0)

$gdibitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap)
$dc = _WinAPI_CreateCompatibleDC($ScreenDc)
_WinAPI_SelectObject($dc, $gdibitmap)
_WinAPI_BitBlt($ScreenDc, 0, 0, $Width, $Height, $dc, 0, 0, $SRCCOPY)

GUIRegisterMsg(0xF, "MY_PAINT")

Do
    $Timer = TimerInit()
    _GDIPlus_ImageDispose($hImage1)
    _WinAPI_DeleteObject($hBitmap1)
;DllCall($ghGDIPDll, "int", "GdipGraphicsClear", "hwnd", $hBackbuffer, "int", 0xFFFFFFFF)
    DllCall("GDI32.dll", "int", "BitBlt", "hwnd", $ScreenDc, "int", 0, "int", 0, "int", $Width, "int", $Height, _
            "hwnd", $dc, "int", 0, "int", 0, "int", $SRCCOPY)
    $hBitmap1 = _ScreenCapture_Capture("", 0, 0, $Width, $Height, False)
    $hImage1 = _GDIPlus_BitmapCreateFromHBITMAP($hBitmap1)
    _GDIPlus_GraphicsDrawImage($hBackbuffer, $hImage1, 0, 0)
    _WinAPI_DeleteDC($dc)
    _WinAPI_DeleteObject($gdibitmap)

    $gdibitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap)
    $dc = _WinAPI_CreateCompatibleDC($ScreenDc)
    _WinAPI_SelectObject($dc, $gdibitmap)
    _WinAPI_BitBlt($ScreenDc, 0, 0, $Width, $Height, $dc, 0, 0, $SRCCOPY)
    ConsoleWrite(TimerDiff($Timer) & @CRLF)

Until Not Sleep(250)

Func close()
    _GDIPlus_ImageDispose($hImage1)
    _WinAPI_DeleteObject($hBitmap1)
    _WinAPI_DeleteDC($dc)
    _WinAPI_DeleteObject($gdibitmap)
    _WinAPI_ReleaseDC($hWnd, $ScreenDc)
    _GDIPlus_GraphicsDispose($hBackbuffer)
    _GDIPlus_BitmapDispose($hBitmap)
    _GDIPlus_GraphicsDispose($hGraphics)
    _GDIPlus_Shutdown()
    Exit
EndFunc  ;==>close

Func MY_PAINT($hWnd1, $MSG, $wParam, $lParam)
; Check, if the GUI with the Graphic should be repainted
    If $hWnd1 = $hWnd Then
        $Timer = TimerInit()

    ;_GDIPlus_GraphicsClear($hBackbuffer, 0xFFFFFFFF)
        DllCall($ghGDIPDll, "int", "GdipGraphicsClear", "hwnd", $hBackbuffer, "int", 0xFFFFFFFF)

    ;_WinAPI_BitBlt($ScreenDc, 0, 0, $Width, $Height, $dc, 0, 0, $SRCCOPY)
        DllCall("GDI32.dll", "int", "BitBlt", "hwnd", $ScreenDc, "int", 0, "int", 0, "int", $Width, "int", $Height, _
                "hwnd", $dc, "int", 0, "int", 0, "int", $SRCCOPY)
        ConsoleWrite(TimerDiff($Timer) & @CRLF)
    EndIf
EndFunc  ;==>MY_PAINT
;

Good luck.

[nuki]

another example i prefer:

you have to replace the "Editor" in WinGetHandle with your wintitle and this is just a test script, you have to release the resources of the gdi funcs too

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#NoTrayIcon
#include <GUIConstantsEx.au3>
#include <ScreenCapture.au3>
#include <GDIPlus.au3>

$guiMain = GUICreate("Test Window", 402, 306, 810, 423)
$guiPic = GUICtrlCreatePic("", 8, 8, 385, 289)
GUISetState(@SW_SHOW)

_GDIPlus_Startup()

$hWnd = WinGetHandle("Editor") ; <- type the window title you want to capture here
$hBitmap = _ScreenCapture_CaptureWnd("",$hWnd)
$hImage = _GDIPlus_BitmapCreateFromHBITMAP ($hBitmap)
$iX = _GDIPlus_ImageGetWidth ($hImage)
$iY = _GDIPlus_ImageGetHeight ($hImage)
$hBitmap2 = _GDIPlus_BitmapCloneArea($hImage, 0, 0, $iX, $iY, $GDIP_PXF24RGB)
$hHBitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBitmap2)

_SetBitmapToCtrl($guiPic, $hHBitmap)

While 1
    If GUIGetMsg() = $GUI_EVENT_CLOSE Then Exit
    Sleep(10)
WEnd

Func _SetBitmapToCtrl($CtrlId, $hBitmap) ;function by Zedna
    Local Const $STM_SETIMAGE = 0x0172
    Local Const $IMAGE_BITMAP = 0
    Local Const $SS_BITMAP = 0xE
    Local Const $GWL_STYLE = -16

    Local $hWnd = GUICtrlGetHandle($CtrlId)
    If $hWnd = 0 Then Return SetError(1, 0, 0)
    
    ; set SS_BITMAP style to control
    Local $oldStyle = _WinAPI_GetWindowLong($hWnd, $GWL_STYLE)
    If @error Then Return SetError(2, 0, 0)
    _WinAPI_SetWindowLong($hWnd, $GWL_STYLE, BitOR($oldStyle, $SS_BITMAP))
    If @error Then Return SetError(3, 0, 0)
    
    Local $oldBmp = _SendMessage($hWnd, $STM_SETIMAGE, $IMAGE_BITMAP, $hBitmap)
    If @error Then Return SetError(4, 0, 0)
    If $oldBmp <> 0 Then _WinAPI_DeleteObject($oldBmp)
    Return 1
EndFunc

Edited June 1, 2009 by nuki

[E1M1]

Malkey your source is close to my needs but I want to change it's working method.

1)it must return binary string from picture, I should look like this:

Pic:

String:

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0x89504E470D0A1A0A0000000D49484452000000A9000000FA080200000055ADF021000000017352474200AECE1CE9000000

0467414D410000B18F0BFC6105000000206348524D00007A26000080840000FA00000080E8000075300000EA6000003A9800

0017709CBA513C00000FBE49444154785EED5D697014C715263F53A9CA9FA42A65174E08544C551470810526DCB621215C26

184238630C658784C35C76380C24984348C24612200E6340DC1043C020EC7019CC21872BC6845B1C0664718ADB58C64A434B

ED56CFD13D3DC7CEEC7C5B53303BFB76A6FB7DFD5EBFF7BDEED5F7EE5D3D5D05AF786A80605F7AAF0447DC34707471EF2A14

7BF22F8E5869A012F62726D6D13DEA9E98F4F4C9C9A927D3EA9D9C52FF547A03721466342CCC6C5438B5F1E9B79B9C7EA7E9

9969CDCE643D7B26EBB9B3D9CF9FCD69716E7ACB73337E736E66AB2F66FEEE8BDCD6E767B5393FBBEDF939ED2ECC6D7FE1DD

0E17E6FDFEE2BC8E17DF7BB1687EA7A2059D8B1676F932EF8F5FE6752D5ED4AD7871F7E2253D2E2DED756959AFCBCB5FBABC

A2F7E5952F5F59D9E7CAAABE57FFF9CAD5F75FBDBAFACFD756F7BBB6E62FD7FEF5D7EB6B075C5F37A0E4834125EB5F2BD930

F846FE901BF9436F6E1C76F3C3D76F7EF4C6AD7FFFEDD6A611B7378DBCBD79D4ED2D6FDED93AE6CEB6B1773F1E7777FBDFEF

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3DC33E6EBC58D4FB0B5E0FBC1E783DF07AE0F5C0EB81D703AF075E0FBC9E94D7C3EFED446EBD02E27CC4F988F311E723CE47

9C8F381F713EE27CC4F9D238DF51593380FDE5688FFD7A02ECBFC7FEFB006BB8D84FAF52F695CAF002043D6D79CF6AB82A2D

08793D5BDA85246BBF67D847BD9E1DB7F683D703AF075E0FBC1E783DF07AE0F5C0EB81D703AF27E5F550BF47FD5E922825D3

EFD1463D27448E871C0F391E723CE478C8F190E321C753CEF1502FC7FE7BECBF37D18023C30860BF3EF6DF63FF3DF6DF27D1

EFE13B5D7F80FA7DF9DF42883A57E3B4FDE076C0ED80DB01B7036E07DC0EB81D703BCADC0E6AB8A8E1A2865B490361AE5923

CE479C8F381F713EE27CC4F988F311E723CEC73A5DE93A5D47654AECBFB72F7507A01FECBFC7FEFB4A6ECDDFDF50C7FE7B95

32AB5406FBEF4D549464FBE3A583C0657F51BF47FDBE7C0CE8FB7CA76B07206FD440901C30385D70BAE074C1E982D305A70B

4E179C2E385D70BA524E17EB76B06E07EB76B06EC7620C0499BF823FB0E70F90DF23BF477E8FFC5E3BBF47FD1EFBEFB1FF3E

4EFBEF89C54B4B8D1008A7065CD570017C3841556C953EF6005E51C5A1157385BD4A0E0D99A868C0C1DA8DA87409ED54D400

B0575454128A01FB240455B14BC05E5151492826624FDEE3888F068E2EEEFD70DD0EF90F470C35F07F9D8795DCB9570EDF00

00000049454E44AE426082

2)when function get string like above and PicControl ID as arguments , it must draw pic from string.

Edited June 1, 2009 by E1M1

[JackDinn]

Edit:- sorry , wrong thread , to many tabs open

Edited June 1, 2009 by JackDinn

[Malkey]

Malkey your source is close to my needs but I want to change it's working method.

1)it must return binary string from picture, I should look like this:

Pic:

.....

String:

.........

2)when function get string like above and PicControl ID as arguments , it must draw pic from string.

A possible direction for you is at

http://www.autoitscript.com/forum/index.ph...st&p=681193

or

http://www.autoitscript.com/forum/index.ph...st&p=663576

_GDIPlus_BitmapLockBits() lets you access all the pixels in a continuous BBGGRRAA hex colour format with DllStructGetData(Data Structure, 1)

If you change or replace the returned "0x89504EFF470D0AFF1A0A00FF44..." type string, DllStructSetData(Data Structure, 1, Different String Data) will replace the original string data.

Then call _GDIPlus_BitmapUnlockBits() which allows access to the modified bitmap.

There may be other better ways.