November 2009 - Pharo-dev - lists.pharo.org

Re: [Pharo-project] JPEG plugin.
by John M McIntosh Nov. 4, 2009

Nov. 4, 2009

On 2009-11-03, at 1:01 PM, Andreas Raab wrote: > John M McIntosh wrote: >> I'm looking at the JPEG plugin and wondering? >> (a) Should I convert that to using the os-x platforms JPEG >> implementation, versus our usage of the source from the >> "Independent JPEG Group's software"? > > Seems like a bad trade unless you want to severely rewrite the > plugin interface (making it effectively a new plugin). The current > interface is tied specifically to the IJGs implementation with > internal structures and functions being exposed fairly directly. Yes, however in working with Sophie we noticed *most* interfacing is done via ImageReadWriter which supports a generic interface for creating or reading files or streams. The choice of which class to use is based on iterating over the subclasses and asking who can do the work, it never appeared that people messed about with the JPEG read/write class other than asking for magic decoding/encoding. For Sophie we choose to override this and provided an interface that worked with Apple's quicktime for os-x and Windows to read *lots* of graphics formats and provide us with a resulting form. No doubt I could do the same given if os-x and some flavour of the VM then do a different call path. > >> (b) Should we consider upgrading the VMs from version "6b 27- >> Mar-1998" to the more current "release 7 of 27-Jun-2009" since we >> store the source in the VM SVN tree at the moment. > > That sounds like a good idea. > >> I've not looked but >> (a) Apple might have a private implementation that could be faster >> since it would likely use hardware vector services. > > Almost certainly. Intel's performance prims can make JPEG stuff > quite a bit faster already. > >> (b) Relying on the system libraries for conversion means fixes for >> security issues get prompt attention, versus our non-attention now. > > I'm not sure about this. The IJGs code has been quite robust and to > my knowledge no exploits have ever been published. OTOH, Microsofts > implementation seems to have been sucessfully attacked in the past, > so it's a bit questionable whether using the OS vendors > implementation would necessarily be more secure than the IJGs version. > > Cheers, > - Andreas -- = = = ======================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> Twitter: squeaker68882 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================

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[Pharo-project] Hide some pages from the wiki
by Mariano Martinez Peck Nov. 3, 2009

Nov. 3, 2009

Hi folks! Is out there some Google Code gurÃº ? The thing is this: there are a lot of pages for the test results. For example, TestResult10477, TestResult10481, etc. So...the amount of pages is too much. It is difficult to find something. I tried to see if there was a way to hide some pages from http://code.google.com/p/pharo/w/list but I couldn't find anything. Does someone have an idea how to fix this? Best, Mariano

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[Pharo-project] FW: vm on ubuntu
by Schwab,Wilhelm K Nov. 3, 2009

Nov. 3, 2009

-----Original Message----- From: Schwab,Wilhelm K Sent: Tuesday, November 03, 2009 4:12 PM To: johnmci(a)smalltalkconsulting.com Subject: RE: [Pharo-project] vm on ubuntu John, My ageing image that did the mouse wheel crash is as follows: SmalltalkImage current getSystemAttribute: 1004 'Pharo0.1 of 16 May 2008 [latest update: #10074]' The system dictionary/error handling failure was the RC1 web image. Both quit using the following vm: SmalltalkImage current getSystemAttribute: 1006 'Unix built on Feb 5 2009 19:38:30 Compiler: 4.1.2 (Gentoo 4.1.2 p1.3)' I had bad experiences with newer images, but the old image has been very stable. One could argue that both have been flaky since I upgraded to 9.10. My laptop chipset seems to like the new kernel, especially in terms of reliable access to the full native resolution, and sound works where it did not on 9.04. My desktop did not do so well. The upgrade was quite slow. It soon presented me with a black screen. With no response, I finally killed the power, which apparently corrupted the swap partition. I finally got it back by removing and re-creating the swap partition, followed by a certain amount of forced checking that might or might not have fixed something. Suspecting power management, I disabled putting the display to sleep, and have not had a problem since. The package manager crashed once on my laptop, so I do not rule out problems with the Koala. Bill ________________________________________ From: John M McIntosh [johnmci(a)smalltalkconsulting.com] Sent: Tuesday, November 03, 2009 2:21 PM To: Schwab,Wilhelm K Cc: Pharo-project(a)lists.gforge.inria.fr Subject: Re: [Pharo-project] vm on ubuntu Well beyond the simple memory access violation (seg fault) type of failure then. (a) if you have configured your vm to use a limited amount of memory and you enter a recursive loop the VM likely will thrash thru the available memory in a small number of milliseconds on a fast machine then exit(). I believe by default it's 1GB, but if there is no paging involved to find 1GB of ram it can happen quite quickly. (b) Older unix/linux vm are susceptible to crashing if they expand image memory over the 2GB address boundary. I can't say exactly what version that would be, but if you supply the build information for your VM SmalltalkImage current getSystemAttribute: 1004 and SmalltalkImage current getSystemAttribute: 1006 That might give a clue to if the fixes for the problem are in the VM you are using. On 2009-11-03, at 11:08 AM, Schwab,Wilhelm K wrote: > John, > > I would be happy to give a reproducible example, but one eludes me at > present. To add to the fun, I have now seen the image quit on a > second Linux box; this time, my laptop. I am fairly certain that it > crashed over a mouse wheel event. > > Both machines are running Ubuntu 9.10, which might be the trigger of > my new-found hassles. > > Bill > -- = = = ======================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> Twitter: squeaker68882 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================

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[Pharo-project] JPEG plugin.
by John M McIntosh Nov. 3, 2009

Nov. 3, 2009

I'm looking at the JPEG plugin and wondering? (a) Should I convert that to using the os-x platforms JPEG implementation, versus our usage of the source from the "Independent JPEG Group's software" ? (b) Should we consider upgrading the VMs from version "6b 27- Mar-1998" to the more current "release 7 of 27-Jun-2009" since we store the source in the VM SVN tree at the moment. I've not looked but (a) Apple might have a private implementation that could be faster since it would likely use hardware vector services. (b) Relying on the system libraries for conversion means fixes for security issues get prompt attention, versus our non-attention now. -- = = = ======================================================================== John M. McIntosh <johnmci(a)smalltalkconsulting.com> Twitter: squeaker68882 Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================

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[Pharo-project] vm on ubuntu
by Tudor Girba Nov. 3, 2009

Nov. 3, 2009

Hi, What is the preferred way to install a Pharo vm on Ubuntu? Cheers, Doru -- www.tudorgirba.com "From an abstract enough point of view, any two things are similar."

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[Pharo-project] IRC link in webpage is wrong
by Torsten Bergmann Nov. 3, 2009

Nov. 3, 2009

We can also link to http://webchat.freenode.net/?channels=pharo-project providing access using a browser... -- Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3.5 - sicherer, schneller und einfacher! http://portal.gmx.net/de/go/chbrowser

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[Pharo-project] Server sockets, ephermal ports, and a Linux VM crash
by Schwab,Wilhelm K Nov. 3, 2009

Nov. 3, 2009

Hello all, Is there a preferred way to create TCP servers? KomServices and ConnectionQueue are options; there has been some discussion of the future of KomServices??? A nice trick is to use "ephmeral" ports, which is a fancy way of saying to pass zero for the listening port and let the OS assign a port. I have used that on Windows and it seems to work on Linux. TcpService does a lot to hide its listening socket; some small changes would allow it to use ephemeral ports. Any interest? They seem to work now, but there is no clean way to query the port that is ultimately chosen; the goal is to be able to so allocate a port and then send it to the other side for out of band communications. Perhaps related to my toying with port numbers (but I doubt that), I have had my older image crash a few times today. I created a TcpService on port zero, the listening socket gets a port and all seems reasonably well until I later inspect a few aspects of the TcpService, at which point the vm crashes. Bill

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Nov. 3, 2009

Begin forwarded message: > From: Hernan Wilkinson <hernan.wilkinson(a)gmail.com> > Date: October 29, 2009 2:02:32 PM GMT+01:00 > To: StÃ©phane Ducasse <stephane.ducasse(a)inria.fr> > Subject: MouseOverHandler > > Hi Stef, > do you know why the MouseOverHandler version I made is not in the > main image? the current version is not working well, under heavy use > it generates exceptions... > I'm attaching the version I wrote that I'm using without problem... > > Hernan.

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[Pharo-project] Unicode support problems
by Alexandr Batalshikov Nov. 3, 2009

Nov. 3, 2009

For now, some unicode symbols is impossible input from keyboard (at least, russian letters 'Ð', 'Ð', 'Ð' on Windows platform). I found some solution of this problem: in method ParagraphEditor>>dispatchOnKeyEvent:with: replace line: keyValue := keyValue ifNil: [keyEvent keyValue]. with line: keyValue := keyValue ifNil: [keyEvent keyCharacter asInteger]. Then save method and that's all. Cause of the problem: expressoin "keyEvent keyValue" return small number for all symbols, unclude unicode and give activation of shortcut events, defined in methods ParagraphEditor class>>initializeCmdKeyShortcuts, ParagraphEditor class>>initializeShiftCmdKeyShortcuts. I also notice other strange things: method KeyboardEvent>>keyCharacter sends up to 14 times for one keyboard pressing. Is this normal? Regards, Alexander Batalshikov.

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[Pharo-project] ScriptLoader does not implement loadComanche
by Torsten Bergmann Nov. 3, 2009

Nov. 3, 2009

see http://code.google.com/p/pharo/issues/detail?id=1398 If you are in a dev-image you can use: loadSeaside30 [ self gofer new squeaksource: 'Seaside30'; addPackage: 'LoadOrderTests'; load ] valueSupplyingAnswers: { {'Load Seaside'. true}. {'SqueakSource User Name'. ''}. {'SqueakSource Password'. ''}. {'Run tests'. false}. }. "Set up to development environment (enables seaside web toolbar) " (self environment at: #WAAdmin) applicationDefaults addParent: (self environment at: #WADevelopmentConfiguration) instance. (self environment at: #WASqueakServerAdaptorBrowser) open -- Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3.5 - sicherer, schneller und einfacher! http://portal.gmx.net/de/go/chbrowser

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