[TCLCORE] RC3 and Tk bug 979239

[George P. S. <GeorgePS@XMission.com>]

Sorry about the delay in bringing this up.

This Tk bug is priority 9, and I only just last night wrote a patch to fix 
it.  I attached the patch to the bug report and it's available here if SF 
should go down:
http://www.xmission.com/~georgeps/engineering/software/patches/tkImage_Nov_19_2004.diff


With a PNG that has alpha transparency, and is larger than the 
-width/-height requested it's possible to cause an X error by doing:

  % package require img::png
  % pack [label .l -image [image create photo -file some_alpha.png]]

  % .l config -width 3
  % X Error of failed request:  BadMatch (invalid parameter attributes)
   Major opcode of failed request:  73 (X_GetImage)
   Serial number of failed request:  375
   Current serial number in output stream:  375

This problem exists in all Tk versions since the alpha transparency 
handling was added to photo images (sometime during 8.4.x).

My patch has fixed this problem.

I hope that we can get this into an RC.


Happy Tcl'ing,

George