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GSOC: Dynamic tints, tones and shades based on a named 'anchor' color
by Frederik Fabritius 01 Apr '09

01 Apr '09

Hi Inkscape developers I hope to participate in GSOC 2009 and have written my project proposal in the bottom of this message. I have (very) briefly outlined the idea in an email to Jon A. Cruz, and he did not seem dismissive to this idea ;) This has some overlap with existing blueprints in Launchpad, so this project could be complementing current ongoing efforts in the code base. It seems that the work has barely started yet, so i hope my work will speed up things in this regard. My project proposal is below, and i have signed up for GSOC 2009 (name: frederikf) but not submitted my proposal, since i wanted some feedback from you guys first. Best regards, Frederik ------- Project proposal ------- Name: Frederik Fabritius Project: Dynamic tints, tones and shades based on a named 'anchor' color Project proposal: The idea is to have named colors which objects can inherit as fill or stroke color, so when changing the color value of the named 'anchor' color, all objects inheriting it will change color accordingly. As well as inheriting the exact 'anchor' color it should also be possible to specify an object color as 'linked' a tint/tone/shade of the 'anchor' color. After having seen this in Xara and Adobe Illustrator i immediately thought that Inkscape was missing this feature. I saw on Launchpad that two blueprints had been written, but not much had been implemented: https://blueprints.launchpad.net/inkscape/+spec/named-color-swatches https://blueprints.launchpad.net/inkscape/+spec/color-groups Jon A. Cruz 2008-06-03: This sounds like an overlap of the named color stuff, Open SwatchBook, and what I've been calling "live colors" but are actually dynamic tints, tones and shades based on an 'anchor' color. I have briefly emailed with Jon A. Cruz about this proposal who has said he was just begun implementing part of the ground work for implementing named swatches. I was thinking that this GSOC project might offload/complement some of Jons work. I think the concepts could be extended by not only linking shade/tint of a color, but also looking into linking colors across the spectrum such as complementary/triad/analogous colors as explained here: http://www.tigercolor.com/color-lab/color-theory/color-theory-intro.htm I consider this extension to the concept, to be out of scope of the GSOC delivery. Final deliveries: A named swatches dialog A property editor dialog to edit the color in the swatch, which also allows one to specify a 'linked' tone/tint/shade to a named 'anchor' color in the swatch. These should support being stored in Jon's "Open Swatchbook", if it makes sense in the given timeframe. I know Jon has considered implementing an additional color picker, but i plan on limiting the delivery to support the current color pickers implemented in Inkscape and working out the details with the mentor associated for the project. Inkscape Questions When did you first hear about Inkscape? Have you used Inkscape before? If so, for what sorts of things? Ive used Inkscape mostly for illustrations for the past three years for student projects at my university. I have also used it for website mockups and for doing layouts for event invitations and the like. About Yourself I am currently writing my master's thesis at the Technical University of Denmark where i am writing audio processing on the GPU. I have a 2 week planned vacation where i was going to bring my laptop and work on the project as well. My main programming language is python, but have done various projects in C++, C# and java.

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Inkscape logo license
by Nicolas Dufour 01 Apr '09

01 Apr '09

I know it has already been discussed before, but I can't find any conclusion. We (me and Elisa) need to use the Inkscape logo in two contexts: . to create a customized logos for the inkscape-fr and planet Inkscape-fr websites; . in a book we're currently writing, adapted in our drawings. All of these uses need that the logo allows modifications, and the last one no commercial limitation. We plan to release our work very shortly and we really need to know what to do. Thanks. -- Nicolas

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Tutorial and .po(t) autobuilt
by Luca Bruno 01 Apr '09

01 Apr '09

Hi, For some weeks now, I've been trying to setup an autobuilder for various inkscape docs (and translations). While the .po(t) process is quite fine (minus some rough edges, like errors report), I'm still unable to build the tutorials. I can't even compile correctly them on my machine, and I haven't yet found out the cause of these issue; saxon or java is throwing a NaN in a normal sum calculus... help is highly appreciate. The current result is at http://www.unstable.it/luca/inkscape/trunk/ The cronjob is not yet scheduled, as I don't like wasting cycles when the process is not correctly working. The build environment is a debian unstable chroot, with: ii java-common 0.31 ii libsaxon-java 1:6.5.5-5 ii sun-java6-bin 6-12-1 ii sun-java6-jdk 6-12-1 ii sun-java6-jre 6-12-1 I'm not very comfortable with java and saxon, so I'm glad to hear for your suggestions. Ciao, Luca -- .''`. ** Debian GNU/Linux ** | Luca Bruno (kaeso) : :' : The Universal O.S. | lucab (AT) debian.org `. `'` | GPG Key ID: 3BFB9FB3 `- http://www.debian.org | Debian GNU/Linux Developer

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Math on the Wiki?
by Jasper van de Gronde 31 Mar '09

31 Mar '09

Can we have <math></math> enabled on the Wiki? Or am I overlooking something?

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Re: [Inkscape-devel] [Inkscape-translator] Re : new strings and translation statistics for trunk (2009-03-31)
by Alexandre Prokoudine 31 Mar '09

31 Mar '09

On Tue, Mar 31, 2009 at 3:37 PM, Leandro Regueiro wrote: > If the files are well formed it isn't necessary to check if it > Inkscape compiles right with that translations files. Leandro, Inkscape does have to compile before you can generate a POT file :) Alexandre

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Open Clip Art Library Release 0.19 Announcement and OCAL10K Goal Exceeeded
by Jon Phillips 31 Mar '09

31 Mar '09

March 31, 2009 - Release 0.19 of Open Clip Art Library (http://www.openclipart.org), containing over 12,000 high quality scalable vector graphics (SVG) files released into the public domain by over a 1000 artists, is now available for download and use. In celebration of this accomplishment, since OCAL��s last release happened in 2005, and March being 5th anniversary of the Open Clip Art Library (OCAL), the OCAL community set a goal to achieve 10,000 uploaded pieces of vector graphics. The project achieved this with the 10,000th submission from user Boobaloo who uploaded a graphic of an onion. The project congratulates Boobaloo for uploading the 10,000th upload. Also, project congratulates all artists who have uploaded in this anniversary OCAL10K sprint. The project congratulates Nicu who personally crossed the 500 clip art upload barrier and now has 696 pieces of clip art uploaded to the system. All efforts towards the OCAL10K goal helped boost the site��s registrations and focus on releasing monthly packages once more to make this project a flowing river of clip art uploads. Since all contributions to the project are released into the public domain via the Creative Commons Public Domain Dedication, anyone may use the Open Clip Art Library files for any use including collections, to make money, and to generate compositions. However, the community encourages anyone who uses the clip art to provide attribution back to the original clip art in the form of a link or to announce the use of the clip art in some form. For the month of April in lead up to the annual Libre Graphics Meeting 2009 in Montreal, May 5-9, 2009, the Open Clip Art Library is setting a goal to achieve 12,000 pieces of uploaded clip art related to spring time, release the 0.20 package of clip art, and to update the site��s software to ccHost 5. The projects asks all who are software developers comfortable with PHP and MYSQL, to consider joining the project now ti help with three critical tasks of adding rendered thumbnails, update the site software to ccHost 5, and to help roll-out our latest software theme. Highlight * An offline HTML gallery to browse through the thumbnails of all clip arts * Over 4,000 new cliparts as compared to release 0.18. * 10,000th upload by Boobaloo: http://openclipart.org/media/files/boobaloo/11895 * Refocused Development around three critical tasks * Call for Participation toward April goals of 12,000 uploads about spring * Call for Participation towards Libre Graphics Meeting 2009 ** http://libregraphicsmeeting.org/ Downloads * http://openclipart.org/downloads/0.19/openclipart-0.19.tar.bz2 * http://openclipart.org/downloads/0.19/openclipart-0.19.tar.gz * http://openclipart.org/downloads/0.19/openclipart-0.19.zip Press Kit * Logos: http://openclipart.org/media/view/media/about * All Clip Art: http://openclipart.org/media/view/media/clip_art About Open Clip Art Library Founded in 2004 from Inkscape, the open source drawing tool, the Open Clip Art Library (http://www.openclipart.org/) aims to create an archive of user contributed clip art that may be freely used. All graphics submitted to the project are placed into the Public Domain according to the Creative Commons Public Domain Declaration. Help by submitting artwork today or join the IRC channel or the mailing list to find out about e.g. web development related contributions: http://openclipart.org/discussion For More Information: http://www.openclipart.org.

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GSoC 2009 project - lib2geom development
by Marco 31 Mar '09

31 Mar '09

Hi all! After some talk with Nathan Hurst I decided to apply for GSoC also this year. I would like to go on with the development of lib2geom that as I can see is now almost completely integrated into Inkscape. So, before submitting my project proposal to google I would like to know your opinions! Kind Regards, Marco =======================PROPOSAL START============================ Name: Marco Cecchetti Project: lib2geom development Abstract Lib2geom has become the core geometric library of Inkscape and it is also an open source project on its own. My project aims to expand the library and give evidence of its skills through the implementation of ad hoc "toys": little interactive applications showing off the power of lib2geom. Moreover many of these toys could be suitable directly for live path effects. Goals (1) Complete the work on bezier clipping routines making them more robust, and implement more specialized intersection routines for the various curve types; (2) Adding support for more basic geometric shapes (triangle, regular polygon, ...) so making easier the development of educational and technical geometric tools. (3) Implementation of a new curve type (clothoid) to let 2geom supporting spiro tools into Inkscape; a clothoid toy showing off the feature of the implemented curve will be provided, too. (4) In case I have some time left after fulfilling the other goals I would like to implement a parallel version of some 2geom routine using a multi-thread library, and explore the possibility of exploiting vectorialized support (e.g. SSE2) provided by modern cpus. Details (1) Towards the end of my last year project I start developing routines that compute the intersection points and the collinear normals of two Bezier curves. Both these routines are based on the Bezier clipping technique as it is explained on Sederberg's book [1]. Though at 99% these routines work correctly there are still cases where they show some spurious behaviour. As they are really useful tools I think that spending some time in order to make them more roubust it is a worthwhile task. Moreover I would like to investigate the utility of implement specialized intersection routines for various curve tipes (bezier-conics), (conics-conics) (conics-line) and so on. This would save the time needed to convert them to symmetric power basis or to bernstein basis before computing the intersection and would make also the computation more robust by removing the possible approximation errors introduced by the conversion stage. (2) In order to simplify the implementation of technical drawing tools or the development of a geometric educational version of inkscape, I think that it is useful to have direct support in lib2geom for simple geometric objects and the availability of geometric construction methods. In my last year project I implemented several tools, such as (infinite) line, ray, circle, ellipse, arcs and I provided routines for making up parallel line, perpendicular line, angle bisector, circle by 3 points, ellipse by 5 points. Now I want to go on adding new geometric objects such as triangle, regular polygon, and the left conic sections, moreover I want to implement other construction methods such as circle by 2 points and tangent to a line, inscribed and circumscribed circle of a triangle and of a regular polygon, conic section by 5 points and so on. (3) A Clothoid, also known as Euler's spiral, is characterized by the property that its curvature varies linearly with the arc length. Because of this important property they are useful in the route design of highways and railways to achieve smooth transitions between lines. For the same reason they are also appreciated in the design of font types. I'll provide the Clothoid class with a complete implementation of all methods inherited by the abstract Curve class such as bounds computation, evaluation for a given parameter value, conversion to and from a s-power basis path, and so on. The Clothoid-Toy will provide the ability of interactively play with a clothoid curve by modifying the initial and the final clothoid arc points, set its length, watch the projection of an external point on the curve, and all other abilities that the Clothoid class will own. (4) Several 2geom routines such as the bezier clipping algorithm and the curve-curve distance computation will benefit from a parallel implementation. The trick is in partitioning the work in several tasks that can be executed by different threads managed by a task scheduler. All that can be achieved using a multi-thread library like the Intel Threading Building Blocks (released under the GPL license) or through the Boost.ThreadPool library still in active developement. Likewise exploiting a vectorialized instruction set such as SSE2 will allow us to parallelize the computation of large amount of data by producing more compact assembly code, that is working on "packed" data we save a large number of clock cycles. Benefits to Inkscape My first goal is to simplify the development of technical drawing tools into Inkscape and the development of an educational version of Inkscape focused on geometry learning and here I think to programs like Cabri [2]. All the first 3 points of my project go in this direction. The geometric construction methods I want to implement will make possible to deploy new technical live path effects. Expecially the fulfil of the third point will simplify the design of a complete spiro tool into Inkscape (at present such functionality is supported by a live effect). Having a complete and robust api for curve intersections will be useful to simplify the implementation of cut path tools, and boolean shape operations. Finally, the fourth point will put the basis for exploiting the power of modern cpu architetures. About me I am a student in mathematics (University of Pisa, Italy) I am always been keen on computer graphics and I am interested in computational geometry. My main programming language is C++, but in the past I also programmed in pascal, fortran 90, assembler, java, javascript, actionscript, bash script. Moreover I am knowgeable about several Boost libraries, XML APIs and the Scalar Vector Graphics Markup Language. Contributions to open source projects My main contribution in the open source field is the Google Summer of Code Project I applied for the last year. It was about 2geom development. In the project time-frame I achieved the following goals: - Implementation of a new curve type that fulfils the traits of an SVG Elliptical Arc and of an "Elliptic Toy" for playing with this curve type. - Some basic GSL library wrapping classes such as Vector, VectorView, Matrix, MatrixView and a fitting tool. - Ellipse and Circle curves with the ability to be created or by the algebraic implicit equation, or by providing a sufficient number of points lying on the curve. - Nearest point routines for all curve types, computing the point on the curve nearest to a given external point. - A curve-curve distance routine. - A Polynomial class for symbolic computation. - Implicitization method for polynomial curve intersection, and Bezier clipping method for Bezier curve intersection and for collinear normal matching. - Several simple geometric objects and construction methods that I have already listed above. I'm developing an extension of Boost.Function [3] in order to implement a model of function concept supporting multi-signature and so overloading. [4] I contributed in the development of a proof of concept svg import filter for Open Office. This import filter has been developed mainly by Fridrich Strba at Novell, my contribute consists in having added svg text element support to the import filter. [5] [1] Sederberg, Computer Aided Geometric Design [2] http://www.cabri.com/cabri-2-plus.html [3] http://www.boost.org/doc/html/function.html [4] source code: https://svn.boost.org/svn/boost/sandbox/overload/trunk documentation: http://docs.google.com/View?docid=dfxvjncs_1x6456m [5] source code: http://tinyurl.com/2es9cu =======================PROPOSAL END============================== -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/

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Libre Graphics Meeting 2009 Call for Presentations
by Jon Phillips 31 Mar '09

31 Mar '09

Apologies for cross-posting. Please spread around :) ### Hi, FYI, the standard LGM press release: Libre Graphics Meeting (LGM), the premiere workshop and conference for developers and enthusiasts of free software graphics, will be held May 6-9, 2009, at Ecole Polytechnique in Montreal, Quebec, Canada. LGM invites you to share your work with the community. Topics of interest include reports on major open source graphics projects, technology previews, engineering talks, power-user techniques, graphics business best practices, and general issues such as open file formats and collaboration. Interested projects and individuals should submit proposals for presentations, demonstrations, and birds-of-a-feather (BOF) sessions by visiting the talk submission page at the CREATE project wiki. Proposals should be at most two paragraph abstracts and should include any special technical requirements. http://create.freedesktop.org/wiki/Conference_2009/Submit_Talk Individuals who already plan to attend can now register free of charge at the LGM Web site. http://www.libregraphicsmeeting.org/2009/signup.php The call for participation ends April 1, so don't delay! About Libre Graphics Meeting: For four years, the Libre Graphics Meeting has been the premiere conference for developers, users and supporters of free software graphics applications. Developers from projects such as GIMP, Inkscape, Blender, Krita, Scribus, Hugin, the Open Clipart Library, and the Open Font Library gather to work on interoperability, shared standards, and new ideas. Work at prior LGMs has pushed the state of the art in important areas such as color management, cross-application sharing of brushes and other assets, and common formats. The face-to-face meetings and opportunities for collaboration are important to developers, but LGM offers plenty for end users as well. Tutorials, talks, and birds-of-a-feather (BOF) meetings to help free software users get the most out of their applications fill out the LGM schedule, and demonstrations from artists showcase what is possible. For more information, visit www.libregraphicsmeeting.org To support LGM 2009's community fundraising campaign, visit pledgie.com/campaigns/2926 -- Jon Phillips http://rejon.org/ +1.415.830.3884 (sf/global) +86 132-6817-8381 (china) Sent from: Beijing 11 China.

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Re: [Inkscape-devel] [FWD: [Inkscape-docs] Inkscape File formats]
by John & Melonie Curwood 31 Mar '09

31 Mar '09

Hi, Sorry It's taken so long to get back to you. You asked about a format list after my last emial. well here they are. Now I think I have the lists correct, but it seemed everytime I looked through the Open and Save dialogs I saw something new, so I've been through the dialogs several times refining the lists. To save space I will only add the discrepncy lists to the email. If you want the whole lot just let me know. FORMATS THAT CAN ONLY BE OPENED IN LINUX .outline .ps .eps .cdr .txt .icns FORMATS THAT CAN ONLY BE SAVED IN LINUX .ai .epsi .dxf (AutoCAD DXF) .xcf FORMATS MENTIONED IN MANUAL THAT AREN'T IN EITHER wIN OR LINUX .dia FORMATS NOT IN MANUAL THAT CAN BE OPENED/SAVED BY WIN OR LINUX .emf .wmf .wpg .gif .cdr .txt .icns .gpl .zip Now as I said in my original email the final list I am happy to add to the manual, it's just here for general info. Cheers, John Curwood Alexandre Prokoudine wrote: > On Fri, Mar 13, 2009 at 10:51 PM, <marketing@...2141...> wrote: > >> Hi everyone, >> >> I'm Currently working on the Floss Manuals Inkscape manual. At the moment I >> am editing the working with files chapter and have a few questions about >> file formats. I originally posted my question to the Inkscape docs list and >> was advised to ask my question of the Inkscape-dev list. My original >> posting is below. >> >> I look forward to any info you may have. >> > > You were also asked to provide list of file formats of interest :) > > Alexandre > > >

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Re: [Inkscape-devel] Rendering problem for an object with blur / 0.46 Official vs 209225 vs 20967
by worms invasion 30 Mar '09

30 Mar '09

I don't know, really. I *am* on not-so-fast machine myself, and seeing so many "legacy" drawings being degraded this way is... awful. I just can't imagine all the people who will encounter the same experience, and what they will think about Inkscape. What worries me, is that it will force everyone to use "better" or "best", when obviously they don't need it *really*, in fact. Not everyone uses advanced filters. Where is the benefit? I can't, I really can't work on awful renderings like what 0.47 shows, and using a better filter quality puts my machine down. Inkscape has become unusable for me. The dramatic change in the "average quality" is a total turn off :-( Maybe the blur and filter qualities could be stored on a per-document basis, and not for Inkscape itself? Maybe Inkscape could recognize that the file was created with This or That version, and issue a warning of some sort in that case when opening the file, saying "this file was created with an earlier version of Inkscape, the average blur and filter quality will be set to better for this file". These "old" files do not contain advanced filters as 0.47 allows them, anyway, so the performance degradation should not be noticeable and the rendering will be correct on canvas, allowing proper editing? I don't know what would then happen if the user would want to add the (awesome) new filters to the "old" file. I don't know :-( --- On Sun, 3/29/09, Jasper van de Gronde <th.v.d.gronde@...528...> wrote: > From: Jasper van de Gronde <th.v.d.gronde@...528...> > Subject: Re: [Inkscape-devel] Rendering problem for an object with blur / 0.46 Official vs 209225 vs 20967 > To: "Inkscape Devel List" <inkscape-devel(a)lists.sourceforge.net> > Date: Sunday, March 29, 2009, 6:41 AM > worms invasion wrote: > > ... > > For all the reasons explained above, I think that, > although done with > > the best intention, the fact that the blur/filter > display "average > > quality" has changed results in the opposite effect > as the one > > intended. It seems to me that, at the moment, there > are more SVG "done > > with 0.46" than "done with O.47', and that the case I > am describing > > will arrive for a long, long time... > > > > If I missed an obvious point, I'd very much like to > hear it. > > I don't think you missed anything, and perhaps we should > rethink the > default setting of the filter quality, but the fact remains > that for > people with not-so-fast machines the best filter quality > simply isn't an > option when interacting with the graphics. (And it is in > fact not > uncommon for drawing programs to have low-quality rendering > modes.) > > So, assuming that simply removing the lower quality > settings is > (currently) not an option, what do you think is an > acceptable way of > decreasing the quality in exchange for speed? > > ------------------------------------------------------------------------------ > _______________________________________________ > Inkscape-devel mailing list > Inkscape-devel(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/inkscape-devel >

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