#78 XGetImage returns NULL under OSX10.9.1 + XQuartz

[chrism238]

I've an application primarily using Tcl/Tk to provide a GUI on both OS-X and Linux. One of its requirements is to take a 'snapshot' of a specific Tk canvas so that it can be manipulated at the pixel level. A small sample of its code and actions, that demonstrate the problem, may be found from https://www.dropbox.com/s/86pp744die1prf6/img-broken.tcl).

Under OSX-10.8.5 all was going well; upgrade to 10.9.1 and the application and sample script fail with the error message:

Error in startup script: Window ".f0.map" cannot be transformed into a pixmap (possibly obscured?)
while executing
"image create photo snap -format window -data $map" (file "./broken.tcl" line 35)

The error message comes from window/window.c:285 after a call to XGetImage() fails.

This combination of libraries/packages works for me:

OSX 10.8.5, Xcode 5.0.2, XQuartz 2.7.4
Tk 8.5, /System/Library/Tcl/8.5/Img1.4/

this combination does not:

OSX 10.9.1, Xcode 5.0.2, XQuartz 2.7.5 (or 2.7.4)
Tk 8.5 (or ActiveTcl 8.6), /System/Library/Tcl/8.5/Img1.4 (or Img1.4.2)

Any help most welcome, as I've found the error (message) but unsure which component is no longer working!

[chrism238]

Oops, sorry, this applies to 1.4 and 1.4.2 (not the 1.2.4 group it's in).

[Paul Obermeier]

Works for me on Mavericks 10.9.5 and ActiveState Tcl 8.6.3.

[Paul Obermeier]

Works with Tcl/Tk 8.6.13 and current Img version.
Tested on Windows, Linux, Mac (Intel and AMD).