- Inkscape Devel - Inkscape Mailman

Re: [Inkscape-devel] Intrested student
by Felipe Sanches 12 Jan '09

12 Jan '09

I don't understand a lot about it. But I would tell you that the basic need is to separate inkscape code in at least 2 threads: one for rendering and the other one for user interface (functional parallelism), so that the user interface dont get non-responsive when the user is dealing with a drawing too complex that requires a lot of cpu power. Another thing that could be interesting is to use multithreading to speed up inkscape's algorithms. There are algorithms that we use that can be separated in various threads (data parallelism) so that multicore users will benefit from better performance (each CPU core chews a piece of the data at the same time). There is already one feature in Inkscape using data paralelism. It is the algorithm that renders the gaussian blur filtering primitive. We have used OpenMP to implement the threading of this algorithm. It detects the number of cores you have in your machine and then decides in how many threads it will split the for loops. But it wasn't coded by me. I am just telling you what I heard here on the list and on IRC. I guess we should keep this conversation on the list so that other people could help you too. Juca On Mon, Jan 12, 2009 at 11:32 AM, Dmitry <dmitry.jurasov@...400...> wrote: > > > FS> On Mon, Dec 1, 2008 at 1:57 PM, Dmitry <dmitry.jurasov@...400...> wrote: > >>> Hello inkscape-devel, >>> >>> My name is Dmitry, I'm a student from Russia. I'm interested in >>> developing your project and participating in next Summer of Code (2009). >>> I want to know about ideas, which I can take part in. And I'm going to >>> make this work to be my master thesis at University. >>> > > Monday, December 1, 2008, 7:17:16 PM, you wrote: > > FS> Maybe somebody could try to use openmp in all of the SVGFilters code, but I > FS> think that this would be too simple for your master thesis. > FS> Indeed, it would be much better if somebody ported the filtering code to > FS> cairo, and then used it in inkscape. This would be a bit harder since it > FS> would be necessary to define a cairo API for filter effects. > > FS> But if you wish to work on inkscape related stuff in your master thesis, > FS> then I think that it should be something really hard. The first thing that I > FS> can think about is the process of porting the SPObject and all of its > FS> derived classes to C++ > > FS> Also, another thing that is possibly hard enough for your thesis is > FS> implementing threading in Inkscape. > > FS> Juca > > Hello Felipe, I want to know more about thread implementing in > Inkscape. > > -- > Best regards, > Dmitry mailto:Dmitry.Jurasov@...400... > >

1 0

More than two months of rendering tests
by Jasper van de Gronde 12 Jan '09

12 Jan '09

I've run the rendering tests for a bit more than two months now, usually roughly once a week. The results have actually been relatively stable, considering all the refactoring work going on. However, there have been a few notable changes. The good news: the number of passed tests has gone from 96 to 105 and the number of failed tests from 65 to 56. The bad news: we have three tests that crash at the moment (introduced between 2008-12-28 and 2009-01-04), and some of the changes in the number of passed tests were due to a rejudging of some the filter outputs (basically there appear to be at least one or two wrong references in the W3C test suite, and Inkscape currently simply doesn't handle the color-interpolation properties, while the actual filters are fine). You can get more details at: http://home.hccnet.nl/th.v.d.gronde/inkscape/ResultViewer.html I intend to continue running the tests as before in the near future, but am still most definitely interested in any additional help in further automating these tests and/or writing the tests. Specifically: - I currently run these tests by starting a batch file on my notebook, basically when I feel like it. A machine which could run this using a timer would be great (it would have to compile inkscape, run the tests and upload the result, possibly generating an e-mail if there are any regressions). - I currently judge any new results (so results which don't match any existing reference). Usually this is fine (most of the time there are only about 1-3 new results), but any help would be appreciated. Of course this would be a lot easier if the machine running the tests could also serve the output images (then a small on-line application could be made for letting people judge the new results). - I'd like to change the comparison algorithm used. Currently I'm using perceptualdiff, but I would like to use something which simply allows for a given error threshold (maximum error and/or rms error). Obviously extra bonus points for an algorithm that can do something sensible for comparing curves (the SVG standard says something about curves having to be within one pixel of the "true" curve or something). - Any additional tests (based on bug reports for example) would obviously be welcome. - I'd love to be able to link a bug report to a certain fail result (linking it to a file is probably not a good idea, as one test may exhibit different bugs over time). Any ideas and/or implementations for doing this would be great. Note that currently the system cannot distinguish between two fail references, so some easy way of specifying for which outputs the bug holds would be very nice.

4 5

Color-interpolation properties
by Jasper van de Gronde 12 Jan '09

12 Jan '09

I found out at least one source of differences in rendering of filters between Inkscape and Batik/W3C test suite, and that's the color-interpolation-filters property. This property determines the color space used for filter operations (color-interpolation does the same for gradients and normal compositing), and Inkscape doesn't support it at the moment. The problem is that by default color-interpolation is set to sRGB and color-interpolation-filters to linearRGB (sRGB before the gamma adjustment)... There was probably some rationale for this, but it's a pretty big nuisance, as it means that we'll probably have to convert to and from linearRGB for each application of filtering (as the conversion is very much non-linear). Also, this means that pretty much any file that uses filters should actually be rendered differently from how it is rendered now (and often quite visibly different). So it might be a good idea to do something about this ASAP, to minimize the impact. So, now my question is: What to do about this? There are a number of possibilities. First of all, Inkscape could start setting the color-interpolation-filters property to use sRGB. This would probably be a very quick "fix" and at least ensure that any new files created with Inkscape will render the same in other (compliant) viewers. Obviously this wouldn't resolve problems with current files. The main other possibility is to add support for color-interpolation-filters. Obviously this is the right thing to do in the long run, but it's also tricky to do it right. Quality (and probably performance) wise it would likely be best to allow the conversion to be part of the filter, as for example gaussian blur already uses increased precision internally and could apply the conversions with little loss in quality. However, it would obviously be much easier to simply write conversion functions and call them before and after applying any filters. And even if support for color-interpolation-filters is added, it might still make sense to set it to sRGB (or set color-interpolation to linearRGB), as letting the settings be different results in non-intuitive behaviour like having normal compositing behaving differently from the equivalent feBlend and feComposite modes.

2 2

Re: [Inkscape-devel] [Inkscape-user] Clear Open recent?
by Felipe Sanches 11 Jan '09

11 Jan '09

I have added a button to the Interface page in the Inkscape preferences dialog that will remove all items of the "File -> Open Recent" menu. The code was commited in the svn revision number 20503 and the feature will probably be in the next stable release, I hope. Could anybory review my code, please? It is the first time I deal with GtkRecentManager. Could you please review it, Bulia? Juca On Sun, Jan 11, 2009 at 2:51 PM, bulia byak <buliabyak@...400...> wrote: > On Sun, Jan 11, 2009 at 9:05 AM, Benct Philip Jonsson <bpj@...2113...> wrote: >> Is it possible to clear the list of documents in >> File -> Open recent? > > Only by manual editing your preferences.xml - you need to delete all > children of <group id="recent">. Or just delete the file, but then you > will also lose all other settings). > > -- > bulia byak > Inkscape. Draw Freely. > http://www.inkscape.org > > ------------------------------------------------------------------------------ > Check out the new SourceForge.net Marketplace. > It is the best place to buy or sell services for > just about anything Open Source. > http://p.sf.net/sfu/Xq1LFB > _______________________________________________ > Inkscape-user mailing list > Inkscape-user(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/inkscape-user >

3 4

extension namespace
by Thomas Holder 11 Jan '09

11 Jan '09

Hi there, is it possible to make the new namespace for inx files optional? I see no real benefit for the namespace, but it is a real drawback that all previous custom extensions will become invalid (until you add the namespace to the inx files). When we release 0.47 lots of users will be confused and will report bugs for this I guess. Thomas

7 15

3D importing
by Alexandre Prokoudine 11 Jan '09

11 Jan '09

Hi, Since recently we have an OBJ importer in form of an extension. IIRC there was a debate how this extension should be implemented better (real importer vs. extension). So, I've just stumbled upon http://assimp.sourceforge.net/ -- Open Asset Import Library, which is designed to help importing various 3D scene files into applications. It covers not just Obj, but also 15 more file formats, including 3D Max and the like. Could be a good GSoC2009 project for somebody, especially if importing would come with live preview :) Alexandre

1 0

Tr : Inkscape 0.46 Devel Dependencies
by Ivan Louette 11 Jan '09

11 Jan '09

That's allright now ! I did a mistake in the package source address... Inkscape 0.46 Devel runs now on my Kubuntu ! I am happy to be able to continue filters development. That will be a little bit slower because at the moment I am very busy to write a book. But these days I also tried the compatibilities between Inkscape and Fontforge and I am sure svg filters will add something new in my font creation ideas... Thanks to everybody here for the hard work ! Very friendly ivan ________________________________ ----- Message transféré ---- De : Ivan Louette <ivan_louette@...48...> À : Inkscape-devel(a)lists.sourceforge.net Envoyé le : Dimanche, 11 Janvier 2009, 17h29mn 41s Objet : Inkscape 0.46 Devel Dependencies Hello ! This is my first message here. Sorry of it's not the appropriate place to post. When I try to install 0.46 Devel by Synaptic on my Kubuntu 8.10 I get this message : Dépend: libpoppler-glib2 (>=0.6) but it is not installable Dépend: libpoppler2 (>=0.6) but it is not installable I hope that can help ! ivan

1 0

Inkscape 0.46 Devel Dependencies
by Ivan Louette 11 Jan '09

11 Jan '09

Hello ! This is my first message here. Sorry of it's not the appropriate place to post. When I try to install 0.46 Devel by Synaptic on my Kubuntu 8.10 I get this message : Dépend: libpoppler-glib2 (>=0.6) but it is not installable Dépend: libpoppler2 (>=0.6) but it is not installable I hope that can help ! ivan

3 3

Calling init_gtkmm_internals()
by Jasper van de Gronde 10 Jan '09

10 Jan '09

I found that to make rendering of feImage filters work correctly I have to call Gtk::Main::init_gtkmm_internals() before trying to use Gdk::Pixbuf. If this is not done it complains about not being able to wrap GdkPixbuf. With this change it suddenly seems to work just fine. However, I have no idea where it should be put. At the moment I put it in nr-filter-image.cpp (because that was were the problem was occurring), but it would probably be better to do it while starting Inkscape. However, it should also be called for Inkview. And perhaps it should be called after/before some other things? So, if someone who is a bit more familiar with GtkMM (and Inkscape's initialization) could have a look at this, that would be great. This very simply change will make feImage's with references to files work automagically :) (There are probably still a few caveats, but still.)

3 5

JavaFX 1.0 support
by Adam Giemza 09 Jan '09

09 Jan '09

Hello all, I know from this blog http://silveiraneto.net/2008/11/21/inkscape-and-javafx-working-together/ that there is JavaFX support build in the latest (0.46) build. BUT the problem is, that this support is for pre-1.0 releases of JavaFX. Silveira (the guy from the blog) postet in his todo list, that the 1.0 support will come on Dec. 2nd. But there is still nothing in this direction, right? I posted a comment on his blog, asking for the progres without any reaction. Maybe somebody here can take up this topic. Would be very much appreciated! Cheers, deradam (Also posted in the InkscapeForum -> http://www.inkscapeforum.com/viewtopic.php?f=20&t=2091)

2 3