[TCLCORE] Exporting Photo Image Transparency

[Donal K. F. <fel...@cs...>]

I propose that the patch referred to in in bug-database ticket 5947 be
applied to Tk (or at least an equivalent version updated to the
current CVS version, obviously!)

The relevant details of the behaviour of the patch are visible at:
  http://dev.scriptics.com/ticket/issue-view.tcl?msg_id=5947

To summarise, it gives access (via tkInt.h/stubs) to the transparency
data contained within photo images, which is currently stored in a
private field of a structure that is only defined within a single file
(generic/tkImgPhoto.c FYI) which will make writing code that uses that
sort of thing possible (most notably, it will make doing interesting
things with shaped windows much easier, as is particularly useful with
tkdnd <URL: http://www.deja.com/getdoc.xp?AN=666304100 >.)  It also
should not break any existing code at all.

I accept that a more complete interface to the transparency data would
be nice, but let's do one thing at a time...  :^)

Donal.
-- 
Donal K. Fellows, Department of Computer Science, University of Manchester, UK.
(work) fel...@cs...     Tel: +44-161-275-6137  (preferred email addr.)
(home) do...@ug...  Tel: +44-1274-401017   Mobile: +44-7957-298955
http://www.cs.man.ac.uk/~fellowsd/  (Don't quote my .sig; I've seen it before!)

--
The TclCore mailing list is sponsored by Ajuba Solutions
To unsubscribe:  email tcl...@aj... with the 
                 word UNSUBSCRIBE as the subject.