swat3d
August 28, 2009, 1:50am
1
Hi guys,
I am creating a python script which batch processes textures. Identifies potential candidates to be converted to grey scale and mode and process them in photoshop.
I’m having trouble with the “changeMode” command. Can’t find the right syntax to do it.
This is what I found in Photoshop’s documentation:
Document.changeMode (destinationMode: ChangeMode , options: DocumentConversionOptions )
And this is my code:
import win32com.client
psApp = win32com.client.Dispatch("Photoshop.Application")
psApp.Open("test.tga")
aDoc = psApp.Application.activeDocument
aDoc.changeMode("Grayscale")
psApp.close(1)
I have tried many different ways of passing the parameter but i always get the same error.
I’m getting this error:
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, u'Adobe Photoshop', u'Illegal argument - argument 1
- Required value is missing', None, 0, -2147220262), None)
File "d:\Projects\Python\_image\find_greyscale_images.py", line 29, in <module>
aDoc.changeMode(ChangeMode)
File "C:\Python26\Lib\site-packages\win32com\client\dynamic.py", line 501, in __getattr__
ret = self._oleobj_.Invoke(retEntry.dispid,0,invoke_type,1)
I guess I’m not passing the arguments correctly but I can’t figure out how to do it.
Anyone can help?
Cheers!
whw
August 29, 2009, 4:22pm
2
Hi Swat3d,
I had a quick look at this and it seems you were pretty close, though the command should’ve been: “aDoc.ChangeMode” - note the captial “C”.
Judging from the Adobe VBScript pdf, you need to specify a pre-definied number to change the document mode, found on page 152: http://www.adobe.com/devnet/photoshop/pdfs/VisualBasicReferenceGuide.pdf
Constant Type:
Values:
So: “aDoc.ChangeMode(1)” converts the image to grayscale.
Hope this helps!
-w
MattiG
August 30, 2009, 2:02am
3
Did that work for you? I can’t test it currently but if you still have problems try
psApp = win32com.client.dynamic.Dispatch(“Photoshop.Application”)
=> as far as I know the ‘dynamic’ makes all those constants like 1 for grayscale available
That code is for javascript, use the VB guide for reference. And VB is always capitalized:
import win32com.client
psApp = win32com.client.Dispatch("Photoshop.Application")
psApp.Open("test.tga")
aDoc = psApp.Application.ActiveDocument
aDoc.ChangeMode("Grayscale")
psApp.Close(1)
And use the enums whw gave
swat3d
August 31, 2009, 12:43am
5
Great! It is working.
Thanks very much for your quick replies and your great help guys!
“aDoc.changeMode(1)”, should be “aDoc.ChangeMode(1)”