OpenEuphoria

RE: Win32Lib Bug (queryFont and wPuts)

• Posted by Derek Parnell <ddparnell at bigpond.com> Apr 15, 2002
• 393 views

I'm scheduling some time tonight to address this and other issues. 
Please be patient as I'm travelling again this week.

Thomas Parslow (PatRat) wrote:
> Hi,
> 
> Found a resource leak bug in win32lib:
> 
> queryFont() and wPuts() both call assignFont() which creates an a
> font and an HDC. The HDC is released in both procedures but the font
> is not, this lead to a huge resource leak in my app (4,000 GDI Objects
> shown in Task Manager rather than 300-400).
> 
> It's simple to fix, I pretty much just cut and pasted from win32lib
> 0.56.
> In wPuts put the following lines just before the call to releaseDC:
> 
>     -- replace the font with the default again
>     replaceObject( id, hdc, DefaultFontID, ForProgram )
> 
> And in queryFont() again put the following lines just before the call
> to releaseDC:
> 
>     -- replace the font with the default again
>     replaceObject( useId, hdc, DefaultFontID, ForProgram )
> 
> This seems to fix it entirely and have no bad side effects :)
> 
> Derek, would it be possible for a bug fix release to be made anytime
> soon with this fix and the setBackColor fix I posted on the 9th? I'd
> prefer not to have to distribute modified a version of win32lib as then
> things would get a little complicated...
> 
> Thomas Parslow (PatRat)
> E-Mail/Jabber: tom at almostobsolete.net
> ICQ: 26359483
> 
> 
>