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Screen Capture with Transparent Windows and Mouse Cursor
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tic



Joined: 22 Apr 2007
Posts: 1458
PostPosted: Thu Sep 04, 2008 6:20 pm    Post subject: Reply with quote
BoBo² wrote:
Is it possible with that script to have a snapshoot and rescale/downsize it to a variable/preset ratio of eg 33/100% before saving? That to create thumbnail images from screenshoots 'on-the-fly'.

Feedback much appreciated.
Cool


I would use the gdi+ library for this
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Icarus



Joined: 24 Nov 2005
Posts: 824
PostPosted: Thu Sep 04, 2008 6:25 pm    Post subject: Reply with quote
BoBo² wrote:
Is it possible with that script to have a snapshoot and rescale/downsize it to a variable/preset ratio of eg 33/100% before saving? That to create thumbnail images from screenshoots 'on-the-fly'.

Feedback much appreciated.
Cool


I am assuming you want something simple and easy enough to implement - so you should download the ScreenCapture.ahk at the top of this thread and read the comments inside.
It has a simple function that gets coordinates and a zoom factor, and it captures and saves PNGs or BMPs or JPGs (I think).
Really easy and useful - I use it to do timed scaled down captures of the screen.
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Sean



Joined: 12 Feb 2007
Posts: 2225
PostPosted: Thu Sep 04, 2008 10:18 pm    Post subject: Reply with quote
BoBo² wrote:
Is it possible with that script to have a snapshoot and rescale/downsize it to a variable/preset ratio of eg 33/100% before saving? That to create thumbnail images from screenshoots 'on-the-fly'.
There are a variety of ways to do it. GDI+ even has a thumbnail specific function, GdipGetImageThumbnail. Anyway, ScreenCapture.ahk already has this functionality:
Icarus wrote:
It has a simple function that gets coordinates and a zoom factor, and it captures and saves PNGs or BMPs or JPGs (I think). Really easy and useful - I use it to do timed scaled down captures of the screen.

For example,
Code:
CaptureScreen("100, 100, 500, 500, 128, 128")
This will capture the region (100,100) ~ (500,500) and save to 128x128 image.
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BoBo²
Guest
PostPosted: Thu Sep 04, 2008 11:27 pm    Post subject: Reply with quote
Thx tic/icarus/Sean. Cool
I've oviously missed that specific information within the scripts documentation. Embarassed
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ScottMattes



Joined: 21 May 2007
Posts: 165
Location: USA
PostPosted: Fri Sep 05, 2008 3:31 pm    Post subject: Reply with quote
Do a search, someone just asked/answered this (I think that the answer was yes and had to do with GDI)
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Scott Mattes

My small, and slowly growing, collection of scripts.
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enmane
Guest
PostPosted: Thu Sep 18, 2008 4:00 pm    Post subject: Help w/this script Reply with quote
I'm currently trying to use this function as a call from another program but it isn't working correctly. I keep getting a screen.bmp file when I desire a JPG. Here's how I'm currently implementing it...

AutoHotkey.ahk has some commands in a loop that call
CaptureScreen(1, False, A_ScriptDir . "\screen.jpg", nQuality:=85)

and I'm using the default settings for CaptureScreen.ahk

1) there are comments commands before
; CaptureScreen() and ;Return
2) the next line is
CaptureScreen(aRect = 0, bCursor = False, sFile= "", nQuality = "") which are the defaults.

Yes, I'm new to scripting but not to programming (but it has been a while).
I've gotten most of my code to work correctly except this part. I know that gdiPlus is working as I tried out Holomind's code and it captured PNGs just fine.

Any ideas??? Sorry if it is obvious. Can I ask someone to give a detailed response?
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enmane
Guest
PostPosted: Thu Sep 18, 2008 4:00 pm    Post subject: Help w/this script Reply with quote
I'm currently trying to use this function as a call from another program but it isn't working correctly. I keep getting a screen.bmp file when I desire a JPG. Here's how I'm currently implementing it...

AutoHotkey.ahk has some commands in a loop that call
CaptureScreen(1, False, A_ScriptDir . "\screen.jpg", nQuality:=85)

and I'm using the default settings for CaptureScreen.ahk

1) there are comments commands before
; CaptureScreen() and ;Return
2) the next line is
CaptureScreen(aRect = 0, bCursor = False, sFile= "", nQuality = "") which are the defaults.

Yes, I'm new to scripting but not to programming (but it has been a while).
I've gotten most of my code to work correctly except this part. I know that gdiPlus is working as I tried out Holomind's code and it captured PNGs just fine.

Any ideas??? Sorry if it is obvious. Can I ask someone to give a detailed response?
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enmane
Guest
PostPosted: Thu Sep 18, 2008 4:45 pm    Post subject: I think I have it figured out Reply with quote
Ok, well - the following is working at creating a screen.jpg file

CaptureScreen(1, False, "screen.JPG", 85)

but now I need to change the names automatically and I looked at the code in Holomind's script and put the following before the call to CaptureScreen

FormatTime, myTime, , yyyyMMdd_hhmmss
fileNameDestP = screens_%myTime%_%LoopCount%.JPG
CaptureScreen(1, False, %fileNameDestP%, 85)

so that it automatically changes the filename but I get an error with the variable %fileNameDestP% when it gets passed to CaptureScreen....

Error: The following variable name contains an illegal character : "screens_20080918_114420_1.JPG"


Any ideas and TIA...
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enmane
Guest
PostPosted: Thu Sep 18, 2008 6:43 pm    Post subject: Never mind Reply with quote
I thought I already tried passing it by reference and not by value but it's working now just by removing % signs and passing the variable...


CaptureScreen(1, False, %fileNameDestP%, 85)

CaptureScreen(1, False, fileNameDestP, 85)

works good now
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BioBrain



Joined: 13 Feb 2008
Posts: 17
Location: Jakarta-Indonesia
PostPosted: Sat Oct 04, 2008 2:56 pm    Post subject: Reply with quote
Anonymous wrote:
BioBrain wrote:
I've been thinking, do U thing it's possible to search is image in clipboard is the same with image I want 2 search. kinda like ImageSearch but not on screen, but search in the Clipboard.

Sure it's possible. You can obtain, using GetClipboardData(), hbitmap (:DDB) or DIB. All necessary ones are ready by now. The remaining question is what procedure you're gonna use for the search, GetPixel through memory dc, where hbitmap is useful but maybe the slowest, or compare raw pixel, where DIB is handy, one by one, or may use hashes of the data.


GetClipboardData(), hbitmap (:DDB) or DIB ?

Any posted topic or tutorials about it? because I can't find it at AutoHotkey help.

Tx. Very Happy
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adamrgolf



Joined: 28 Dec 2006
Posts: 427
PostPosted: Fri Jan 02, 2009 8:43 am    Post subject: Reply with quote
Can someone help me adjust this to capture the entire desktop (multiple monitors) instead of just the primary monitor?
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adamrgolf



Joined: 28 Dec 2006
Posts: 427
PostPosted: Fri Jan 02, 2009 9:13 am    Post subject: Reply with quote
adamrgolf wrote:
Can someone help me adjust this to capture the entire desktop (multiple monitors) instead of just the primary monitor?


I've got this fixed, atleast for dual monitors by adjusting the if !aRect in CaptureScreen() function to this:

Code:
If   !aRect
   {
      SysGet, Mon, Monitor, 1
      nL := MonLeft
      nT := MonTop
      nW := MonRight - MonLeft
      nH := MonBottom - MonTop
   
      SysGet, Mon, Monitor, 2
      nL2 := MonLeft
      nT2 := MonTop
      nW2 := MonRight - MonLeft
      nH2 := MonBottom - MonTop
         
      nL := nL + nL2
      nT := nT + nT2
      nW := nW + nW2
      if nH2 >= nH
         nH := nH2
   }
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Sean



Joined: 12 Feb 2007
Posts: 2225
PostPosted: Fri Jan 02, 2009 10:33 am    Post subject: Reply with quote
adamrgolf wrote:
Can someone help me adjust this to capture the entire desktop (multiple monitors) instead of just the primary monitor?

You can use
Code:
If   !aRect
{
   SysGet, nL, 76
   SysGet, nT, 77
   SysGet, nW, 78
   SysGet, nH, 79
}
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adamrgolf



Joined: 28 Dec 2006
Posts: 427
PostPosted: Fri Jan 02, 2009 1:33 pm    Post subject: Reply with quote
Sean wrote:
adamrgolf wrote:
Can someone help me adjust this to capture the entire desktop (multiple monitors) instead of just the primary monitor?

You can use
Code:
If   !aRect
{
   SysGet, nL, 76
   SysGet, nT, 77
   SysGet, nW, 78
   SysGet, nH, 79
}


I see, thanks Smile
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adamrgolf



Joined: 28 Dec 2006
Posts: 427
PostPosted: Fri Jan 02, 2009 1:51 pm    Post subject: Reply with quote
Irfanview offers an option to capture just the active screen. I wanted to do it with this, since it offers the option to not capture the mouse cursor.

What do you think about adding the following (or something similar) to your code, Sean?

Code:
Else If aRect = 3
   {
      MouseGetPos,mPx,mPy
      SysGet,mC,MonitorCount
      Loop % mC
         {
            SysGet, Mon, Monitor, %A_Index%
            nL := MonLeft
            nT := MonTop
            nW := MonRight - MonLeft
            nH := MonBottom - MonTop
            If ((mPx >= nL) AND (mPx <= nW)) AND ((mPy >= nT) AND (mPy <= nH))
               Break
         }
   }


Then option 3 would be to capture just the active screen, ie the monitor where your mouse is currently. Such as:

Code:
CaptureScreen(3,false,"c:\active_screen.bmp")


Last edited by adamrgolf on Fri Jan 02, 2009 3:01 pm; edited 1 time in total
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