March 2010 - Inkscape Devel - Inkscape Mailman

New memebr and a bug (maybe)
by CoD 01 Apr '10

01 Apr '10

Hello, I'm a 31 years old developer from Italy and I've been using Inkscape for years. I've just subscribed to this mailing list and.. yeah... I'm already here with a bug report :P Recently I experienced a strange behaviour with KDE 4 preview system and svg/svgz files saved with the last version of inkscape (both stable and devel version) so I decided to contact you. I hate duplicate/unclear bug reports so I would like to discuss this thing a bit with you before filing a bug to launchpad. So, let's try to explain what I've found System: Kubuntu 9.10 with KDE 4.3.2 Inkscape: devel version and 0.46 (See below) Reproducible: yes These are the steps I did: 1) I drew a simple icon with inkscape (a circle and a polygon) 2) I save it as svg or svgz (get the file here [1]) 3) The preview on my kubuntu 9.10 looks crazy (get the preview here [2]) as if nodes position has been screwed 4) I open the svg file with Inkscape 0.46 5) I change the color of an element and save again 6) The preview still looks crazy 7) I open the file again with Inkscape 0.46 but this time I move the polygon around, then I place it in the old position and save 8) The preview looks perfect, as if nodes position has been restored (get the file and the preview here [3][4]) I can't really understand what's going on here but seems that KDE 4 has troubles when previewing svg/svgz files saved with inkscape > 0.46 This happens also using ksvgtopng to convert an svg file to a png Could this possibly be related to bug 170049 [5] ? If you need more experiments just ask :-) Thank you Claudio Canavese (CoD) 1: http://cod-web.net/inkscape/devel.svgz 2: http://cod-web.net/inkscape/devel.png 3: http://cod-web.net/inkscape/046.svgz 4: http://cod-web.net/inkscape/046.png 5: https://bugs.launchpad.net/inkscape/+bug/170049

2 2

Curve Sketching
by Ilya Baran 01 Apr '10

01 Apr '10

Hi, I've developed an algorithm for fitting smooth curves (the curves are like in Spiro, but piecewise-linear curvature) to user sketches. I'm thinking that this could be useful in Inkscape as a replacement or alternative to the current pencil tool algorithm. Compared to existing stuff, the benefit is that the curves are usually much nicer, the drawback is that it's a complicated algorithm and is slower--fitting a curve of moderate complexity will likely take about 1 second. Would the Inkscape devs be potentially interested in including this functionality? I'm looking into rewriting my research prototype to be faster, cleaner, more robust, and to remove proprietary dependencies. I can write the library that does the fitting, but I'm unfamiliar with Inkscape's code base, so I'd need help integrating it in. The time frame is that I'd likely be done with the library by the middle of summer. My paper with details and comparisons to existing methods (including Inkscape) at the end is at http://www.mit.edu/~ibaran/curves/ The reported timings can probably be improved by close to a factor of 2. Thanks, -Ilya

8 10

Re: [Inkscape-devel] Curve Sketching
by Ilya Baran 31 Mar '10

31 Mar '10

Hi, Josh, Thanks for the quick reply. I think I'll go back on-list to avoid redundancy. > Hi, > > Off-list reply... > > Thanks for your interest in Inkscape! I will leave it to people more > familiar with our internals and the pencil tool to respond regarding > possible integration. :) > > After watching the video, I can say there is definitely an interesting > feature of your little demo app (besides the smoothing). That is the > reshaping of sections of paths based on where the beginning and end of a > stroke intersect with it (rather than node editing as Inkscape > requires). Yes, this is oversketching--it's not a new idea, but I haven't seen it implemented well in a full product (and my implementation in the prototype is not great either). Integrating this feature into Inkscape would be to a large extent a UI issue--and I'm not the best person to figure those out :) > Without having read the paper, what does this implementation look like > in terms of number of nodes/points created? We currently have a > smoothing option for the pencil tool, and when you choose to make it > smoother, it reduces the number of nodes used (and also reduces > accuracy). Yes, in producing the Inkscape examples, I tried tuning the smoothing option as well as I could. The central idea of my algorithm is to solve a global optimization problem explicitly minimizing the number of curve segments, subject to accuracy constraints, so in general it produces relatively few segments. The examples in the paper have the curve segments color coded, so you can see exactly which ones are produced. > Are you at all familiar with lib2geom? It is the geometry library that > Inkscape uses. In terms of curve fitting, I believe that would actually > be the project to integrate that piece into (since we could then utilize > it)... http://lib2geom.sourceforge.net/ I've briefly looked at the source code on SVN, but that's the extent of my familiarity. As far as I can tell, it's based on these S-basis things, to which I haven't been able to find a great introduction--I think I understand them well enough to conclude that converting my splines to this representation (approximately) should be relatively painless. Regardless, I want my library to be standalone (and I need, for example, Eigen for high-performance linear algebra--so I'll use it for vectors in general to make my life easier), but if it makes sense to interface with Inkscape through lib2geom, then that's the way to go. > I'd recommend checking out lib2geom if you have a chance, compiling it, > and checking out the many "toys" that it has... your demo video feels > somewhat like the toys that they create (basically the proof of concept > before things are attempted in Inkscape). Will do. -Ilya

1 0

Moving ahead in inkscape development..
by Abhishek Sharma 31 Mar '10

31 Mar '10

Hello all, I had previously introduced myself as a GSOC 2010 aspirant. I am devoting myself to the idea of c++ifying(in Object Oriented manner) the inkscape code. For that I am trying to move into the code and traversing, but due to its vastness am facing problems in it. I got hold of a very old bug, "Y Scale inversion" -> https://bugs.launchpad.net/inkscape/+bug/170049. As i have seen the heat on this, this bug is of a very wide scope and so can actually help me to involve myself with *much* of the inkscape codebase. So it is my urgent and honest request to inkscape developers as well as corresponding GSOC mentors to just direct me as to where in the code I should start tracking and removing the bug. I will be glad. Thanking You. Yours sincerely, -- Abhishek Sharma B-Tech Information Technology Indian Institute of Information Technology(Amethi Campus)

4 8

Filter effect and blur background
by Yann Papouin 31 Mar '10

31 Mar '10

Hi, Please first take a look at this picture composited in photoshop: http://ftpmerou.free.fr/inkscape/blur-background.png I tried to reproduce the same effect in inkscape easilly, and i made it by using a copy of the picture, bluring it and applying a mask with a shape to simulate the effect: http://ftpmerou.free.fr/inkscape/blur-background-fakebymask.svg It's ok now, but I thought about filter effects (background image can be used as a connection link in the filter editor) and saw this: http://www.w3.org/TR/SVG/filters.html#AccessingBackgroundImage On http://wiki.inkscape.org/wiki/index.php/Filter_Effects there is a note about this property "There's no GUI for setting the enable-background property. This property has to be set on some parent layer of filtered object to make Background Image and Background Alpha input images work." Does the background image support is implemented? Do you think that the same effect can be achieved with filters by applying the effect on a shape (that will blur its background content)?

5 13

Set enable-background by default
by Ivan Louette 31 Mar '10

31 Mar '10

It's easy ! Create a template and place it in Inkscape templates directory. I did it and even replaced my default template with it. ivan

1 0

Re: [Inkscape-devel] Re : Re : Filter effect and blur background
by Yann Papouin 31 Mar '10

31 Mar '10

Wow, amazing, no layer tricks, really thank you Ivan http://ftpmerou.free.fr/inkscape/blurbackground-4.png http://ftpmerou.free.fr/inkscape/blurbackground-4.svg Why "enable-background:new" is not set by default ? 2010/3/31 Ivan Louette <ivan_louette@...48...> > Try this one. It only uses one layer set on "enable-background:new" as > indicated by Niko > > ------------------------------ > *De :* Yann Papouin <yann.papouin@...400...> > *À :* Ivan Louette <ivan_louette@...48...> > *Cc :* Niko Kiirala <niko@...1267...>; > inkscape-devel(a)lists.sourceforge.net > *Envoyé le :* Mer 31 mars 2010, 10 h 01 min 02 s > *Objet :* Re: [Inkscape-devel] Re : Filter effect and blur background > > Thank you Ivan, your template is exactly what I want (but I didn't change > the layer blending mode, it must be normal to work properly) > See a preview here: > > http://ftpmerou.free.fr/inkscape/blurbackground-2.png > http://ftpmerou.free.fr/inkscape/blurbackground-2.svg > > Artifacts can be annoying but it might be fixed later, maybe they are due > to the IIR Filtering method added in 2007? > > By the way, the layer with the "background property" cannot be renamed, > changes are not made in the svg. > >

1 0

Re: [Inkscape-devel] Re : [Inkscape-translator] Frost is upon us
by Lucas Vieites 31 Mar '10

31 Mar '10

Thanks, for both the updates and the tip on the new location. I had overseen it completely. 2010/3/30 Nicolas Dufour <nicoduf@...48...> > Hi, > > >De : Lucas Vieites <lucas@...1852...> > > Could someone please run the "update_po_files.sh" script in the "po" > folder so that we can complete our translations? > > Done in bzr revision 9260. > Please note that Inkscape translations files have moved to bzr: > http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/files/head%3A/po/<http://bazaar.launchpad.net/%7Einkscape.dev/inkscape/trunk/files/head%3A/po/> > > Regards, > -- > Nicolas > > > > > -- Lucas Vieites Blog: http://blog.codexion.com/

1 0

Re: [Inkscape-devel] CGM file import
by Igor Novikov 31 Mar '10

31 Mar '10

Sorry I forgot attaching translation result. I hope it's the same as designed :) Regards, Igor Novikov sK1 Project http://sk1project.org On Wed, Mar 31, 2010 at 2:42 AM, Willem Langenberg <cwlangen@...2327...>wrote: >> >>> Sorry, I forgot to attach the file. Here it is. >>> >>> >>> >>> Willem >>> >>> >>> ------------------------------ >>> >>> *From:* Igor Novikov [mailto:igor.e.novikov@...400...] >>> *Sent:* Tuesday, March 30, 2010 5:28 PM >>> *To:* Willem Langenberg >>> *Cc:* inkscape-devel(a)lists.sourceforge.net >>> *Subject:* Re: [Inkscape-devel] CGM file import >>> >>> >>> >>> Hi Willem! >>> >>> I'm sK1 Project leader and consequently UniConvertor project maintainer. >>> Please send me directly attached CGM file. We will check this issue. >>> >>> Now we are preparing UniConvertor 1.1.5 which is designed as a >>> stand-alone >>> application for win32 platform and contains a lot of improvements since >>> last version. >>> I hope we will fix this issue before release. >>> >>> Regards >>> >>> Igor Novikov >>> sK1 Project >>> http://sk1project.org >>> >>> On Wed, Mar 31, 2010 at 2:14 AM, Willem Langenberg <cwlangen@...2327...> >>> wrote: >>> >>> Inkscape developers: >>> >>> >>> >>> I have been trying to import a CGM file (file attached) into Inkscape >>> (one of the listed file formats), but I get a python.exe error message >>> saying: *uniconverter failed, cannot load plugin module cgmloader.* >>> >>> >>> >>> What does this mean? How can it be corrected? >>> >>> >>> >>> Willem Langenberg >>> >>> Long Mountain Research Inc. >>> >>> 11439-56 Avenue >>> >>> Edmonton, Alberta >>> >>> T6H 0Y1 Canada >>> >>> >>> >>> >>> >>> ------------------------------------------------------------------------------ >>> Download Intel® Parallel Studio Eval >>> Try the new software tools for yourself. Speed compiling, find bugs >>> proactively, and fine-tune applications for parallel performance. >>> See why Intel Parallel Studio got high marks during beta. >>> http://p.sf.net/sfu/intel-sw-dev >>> _______________________________________________ >>> Inkscape-devel mailing list >>> Inkscape-devel(a)lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/inkscape-devel >>> >>> >>> >> >> >

1 0

Re: [Inkscape-devel] CGM file import
by Igor Novikov 31 Mar '10

31 Mar '10

I have checked the file. The problem cause was an absence of font engine in old UniConvertor versions. We have refactored sK1 and UniConvertor code base and font engine now in common sk1libs package. These changes will be in UniConvertor 1.1.5. So just waiting for the release. Thank you for provided sample. It allows us improving some CGM filter related issues. Regards, Igor Novikov sK1 Project http://sk1project.org On Wed, Mar 31, 2010 at 2:42 AM, Willem Langenberg <cwlangen@...2327...>wrote: > Sorry, I forgot to attach the file. Here it is. > > > > Willem > > > ------------------------------ > > *From:* Igor Novikov [mailto:igor.e.novikov@...400...] > *Sent:* Tuesday, March 30, 2010 5:28 PM > *To:* Willem Langenberg > *Cc:* inkscape-devel(a)lists.sourceforge.net > *Subject:* Re: [Inkscape-devel] CGM file import > > > > Hi Willem! > > I'm sK1 Project leader and consequently UniConvertor project maintainer. > Please send me directly attached CGM file. We will check this issue. > > Now we are preparing UniConvertor 1.1.5 which is designed as a stand-alone > application for win32 platform and contains a lot of improvements since > last version. > I hope we will fix this issue before release. > > Regards > > Igor Novikov > sK1 Project > http://sk1project.org > > On Wed, Mar 31, 2010 at 2:14 AM, Willem Langenberg <cwlangen@...2327...> > wrote: > > Inkscape developers: > > > > I have been trying to import a CGM file (file attached) into Inkscape (one > of the listed file formats), but I get a python.exe error message saying: > *uniconverter failed, cannot load plugin module cgmloader.* > > > > What does this mean? How can it be corrected? > > > > Willem Langenberg > > Long Mountain Research Inc. > > 11439-56 Avenue > > Edmonton, Alberta > > T6H 0Y1 Canada > > > > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Inkscape-devel mailing list > Inkscape-devel(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/inkscape-devel > > >

1 0