March 2020 - Inkscape Devel - Inkscape Mailman

win32 build working again
by Bob Jamison 08 Apr '24

08 Apr '24

The win32 build, which was broken for the weekend, is working again. I just made a "manual autobuild" again, so that we can see how it looks on Windows: http://troi.titan-aeu.com/~rjamison/inkscape/builds/ Bob

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Regarding the serialization of Spiro control points
by Fred Brennan 28 Mar '22

28 Mar '22

Greetings, I write from the FontForge project. Of particular interest to me is the Spiro spline feature, which was originated around ten years ago by Raph Levien. One thing I'd like to add, (which would benefit both our projects,) is the ability of FontForge to understand the Inkscape Spiro serialization format. However, there are several things about the format which to me as an outsider appear to be defects serious enough that I have no idea how to even *import* these splines correctly, much less export our Spiro splines to this format. I would very much like to support the _de facto_ standard Inkscape has originated of supporting Spiro in SVG, but I am lost. George Williams, FontForge's original author, noticed this defect over eleven years ago.[1] Things are virtually unchanged since then, I checked `git blame`. Spiro has five point types, not including beginning and ending points. They are: * G4 curve (o) * G2 curve (c) * Corner (v) * Left Constraint ([) * Right Constraint (]) The ASCII single letters are the normal method of Spiro serialization, as championed by Raph Levien and by us in FontForge. Inkscape seems to create what I will call a "pseudo-SVG path". So, it is not really an SVG path, but rather is an SVG path which undergoes transformation into the typical Spiro format. Inkscape stores this in the "original-d" attribute. So, given a Bezier spline with control points defined as (x, y, c1, c2), Inkscape interprets a control point with only (x, y) to be a corner, meanwhile a control point with all four is a G4 curve, and (x, y, c1, NULL) is a left constraint while (x, y, NULL, c2) is a right constraint. I can probably overcome this, although George Williams was right to be skeptical of this format. There is no way I can see to define a G2 curve in this strange "original-d" format. Thus, this email. I write to ask a few things. I suppose first of all, what are the chances that we can convince you guys to store Spiro splines in plate[2] format, or another widely accepted Spiro serialization format? Second, if we cannot convince you to do that, how do I export FontForge spiros which contain G2 control points to Inkscape's original-d format? It's not possible, yes? So should I just silently fail and save them as G4? The curves will not be the same if I do that. Should I disallow export to SVG w/Spiro if glyph contains G2 control point? That seems a steep cost that will just confuse my users, so perhaps I should abandon the whole thing if it comes to that. Cordial regards, Fredrick Brennan (@ctrlcctrlv) [1]: https://narkive.com/63FADpG3.4 [2]: https://levien.com/garden/ppedit/README, section "Plate files"

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Mentorship
by Marc Jeanmougin 31 Mar '20

31 Mar '20

Hi devs ! In these weird times, I hope you're all well and healthy, as well as your families, Inkscape is a community before anything else so the well-being of everyone is a priority. This year we have seen a great increase in the number of applicants to the summer of code, and to make the most of it, we need mentors :) Mentoring a student takes time, and there is a strong incentive to have co-mentoring or backup mentors to ensure students have people they can go to if they have questions and to make the life of mentors easier :) . So if you know the inner workings of the code and/or are or used to be a regular contributor, and if you are willing to try to (co-)mentor a student this year, please step up and contact me :) Mentor guide : https://google.github.io/gsocguides/mentor/ > *Mentor*: Mentors are people from the community who volunteer to work with a student. Mentors provide guidance such as pointers to useful documentation, code reviews, etc. In addition to providing students with feedback and pointers, a mentor acts as an ambassador to help student contributors integrate into their project’s community. Some organizations choose to assign more than one mentor to each of their students. Many members of the community provide guidance to their project’s GSoC students without mentoring in an “official” capacity, much as they would answer anyone’s questions on the project’s mailing list or IRC channel. (alex and tweenk, there are people applying in your areas of expertise (gtk and boolops), so if you feel you'll have enough time and if you want … ;) ) -- Mc

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GSoC proposal for Path Library Improvement
by Moazin Khatri 31 Mar '20

31 Mar '20

Hi everyone, I am Moazin, a BS student at Pakistan Institute of Engineering and Applied Sciences and I am applying for Google Summer of Code 2020. I want to work on the Path Library Improvement project. Inkscape relies on two libraries for its geometry related operations. One is *lib2geom* which was designed specially for Inkscape and the other is *livarot*, a library written in somewhere in 2003 that has some unique features which *lib2geom* doesn't have. Features such as: path simplification, line scanning (flowing text), path offset/Inset, boolean operations and some modes of Tweak Tool. While *livarot* is functionally good, it's quite outdated. It was written long ago and it's extremely hard to understand it or maintain it. The goal of this project is to implement all of these features either in *lib2geom* or outside it while using *lib2geom's* features as much as possible. You can see my proposal here: https://docs.google.com/document/d/11iwmv0SWiVeZh6cjj5Ooze2WdgkqMZhNJeN0hMr… Please let me know if you have any feedback. :-) I've shared this in the chat already, I just forgot to introduce myself in this list. :-D Regards, Moazin

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GSoC proposal for GPU rendering using Pathfinder
by Emmanuel Gil Peyrot 31 Mar '20

31 Mar '20

Hello everyone! Some of you may know me from the IRC channel as linkmauve, this year I’m applying for the Google Summer of Code! I’m a computer science student from France, and I’ve been interested in computer graphics for a long while. I started quite a few years ago when I was working on emulators (such as Citra and Dolphin), I eventually wrote a shader compiler for running 3DS graphics on ARM processors, tried my hand at the demoscene, and wrote the 3D transitions in LibreOffice Impress. But now I want to bring that knowledge to more useful projects, from which a lot of artists who use them every day could benefit. My goal is to bring GPU rendering to Inkscape, in a way that is both portable, performant, maintainable, and understandable by future maintainers. In order to do that, I suggest to use Pathfinder, a library Mozilla is working on, for canvas and SVG rendering, so that efforts improving it can be pooled between the two organisations. People from the organisation should be able to see my first draft here: https://summerofcode.withgoogle.com/dashboard/student/proposal/585975664161… Other people can see it here: https://linkmauve.fr/gsoc/ If anyone has any comment, remark, question or suggestion for this project, please let me know! I’m a bit late submitting it, I prioritised gathering information about the project and almost ran out of time to do the actual proposal, before even reading the GSoC guidelines… Anyway, I hope you’ll find this project useful and interesting, and that I’ll have the pleasure to work on it with you all! :) -- Emmanuel Gil Peyrot

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Introduction for GSoC’20
by Thu Vu 30 Mar '20

30 Mar '20

Hello! My name is Thu Vu and I’m a sophomore studying Computer Science from the University of Texas at Dallas. I have originally first heard of Inkscape when I was around 14 when I was interested in creating vector art and various graphic art pieces. I have heard several artists use it to create wonderful art pieces that have inspired me. Since I have personally used Inkscape before I would have some background insight from a user’s perspective. This would give me an advantage in the knowledge of what a user would like to be implemented or simplified for better user experience when using Inkscape. I have not worked on any open-source projects before, but in joining GSoC’20, it would help me give me first-hand experience of what it is like to work on projects such as that. My main technical skills consisted of C++ and Java as well as HTML, CSS, some JavaScript for web design and development. I also have additional knowledge of working in a UNIX/Linux environment. For project proposals, I’m interested in the Better CSS Style Sheet Support, Refactoring, and Path Library Improvements projects. In all honesty, it gives me great excitement to be possibly working on an Inkscape project from a different perspective besides a user standpoint. I look forward to learning a lot in any of these projects. Also, considering this would be the first time I am applying to GSoC as well as work on an open-source project, I would appreciate any advice on the application process and any tips going forward. Best Regards, Thu Vu

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Introducing myself and my GSOC Proposal/Application: UI-Free Inkscape
by Harald Reingruber 30 Mar '20

30 Mar '20

Hi dear Inkscape Developer Community, I want to submit a proposal for the "UI-Free Inkscape" project idea of this year's Google Summer of Code. Right now, I am doing a sabbatical (since November 2019) and am enrolled at the Vienna University of Technology. Before that, I was working as a Software Developer for several years mostly on graphics related software (Ogre3D, Unity3D, Augmented Reality Apps, Medical Image Processing, etc.). I really like open-source software, was able to do some small contributions to projects like Emscripten, Ogre3D, and several JavaScript projects. I think the GSOC program is an awesome opportunity to work fulltime on Open Source Software, like yours. Due to the current pandemic situation, I hand to do re-organize and partly reschedule my Coding Tour I was already starting in the US for the next couple of weeks. This is the reason for my "last-minute" application. Fortunately, I am able to continue the tour online, here from Austria. Here is a link describing my tour <https://dev.to/harald3dcv/pair-programming-tour-invite-me-for-free-sessions…>, in case you are curious. Anyway, even though I am behind schedule for my GSOC proposal I hope that I will be able to submit a successful application to you and show you that I am able to succeed in making a UI-Free Inkscape version or at least being able to move this ongoing effort a huge step forward. *The "two patches" rule is a great idea, but as I am a bit late in the application process I wanted to ask if it is required to submit them before the upcoming proposal deadline tomorrow?* I definitely will be able to send them within the next 1-2 weeks, it would be great if that would not be a blocker for my proposal (at least not right now). The reason why I chose the "UI-Free Inkscape" project idea is because I am a huge fan of automating things, and I really like the idea of being able to use Inkscape for several tasks on a server, or in the backend of an application. I think this might increase the usage of Inkscape even more. I saw that this idea is already an ongoing task. It is probably hard to say how much effort there is left, and how likely it is to complete the task within the GSOC time. On the other hand, if the task can not be completed within the time of GSOC, it should be possible to move it a substantial step forward. My idea would be to iterate in small steps and frequently submit those parts for which I was able to remove the UI dependency for review. There is already a lot of valuable information regarding the GSOC process on the Inkscape wiki, still,* I would like to ask if you have any suggestions, tips and/or tricks for my proposal submission?* Thanks in advance for your support, Harald

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Re%3A Re%3A Script for Installing Dependencies&In-Reply-To=<2badf884-7193-70d4-ff4f-638fa8f0253c%40jeanmougin.fr>
by Keisuke Suzuki 29 Mar '20

29 Mar '20

Hi Mark, Thank you for your quick and clear response. I will try to follow these instructions! Keisuke

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Script for Installing Dependencies
by Keisuke Suzuki 28 Mar '20

28 Mar '20

Hi everyone, My name is Keisuke Suzuki and I'm a senior student studying computer science. I had a problem with installing dependencies using the script from the getting started page. I am using a distribution called Elementary OS which is one of the derived distribution from Ubuntu. When I run the set of commands from the page, wget -v https://gitlab.com/inkscape/inkscape-ci-docker/raw/master/install_dependenc… -O install_dependencies.sh bash install_dependencies.sh --recommended the output says, --2020-03-28 15:49:46-- https://gitlab.com/inkscape/inkscape-ci-docker/raw/master/install_dependenc… Resolving gitlab.com (gitlab.com)... 35.231.145.151, 2606:4700:90:0:f22e:fbec:5bed:a9b9 Connecting to gitlab.com (gitlab.com)|35.231.145.151|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 7654 (7.5K) [text/plain] Saving to: ‘install_dependencies.sh.1’ install_dependencies.sh.1 100%[======================================================================================================>] 7.47K --.-KB/s in 0s 2020-03-28 15:49:47 (286 MB/s) - ‘install_dependencies.sh.1’ saved [7654/7654] Downloading and installing dependencies. This may take some time. + [[ elementary == \d\e\b\i\a\n ]] + [[ elementary == \u\b\u\n\t\u ]] + [[ elementary == \f\e\d\o\r\a ]] + [[ linux-gnu == \m\s\y\s ]] + [[ elementary == \/\e\t\c\/\o\s\-\r\e\l\e\a\s\e\ \I\D\ \o\f\ \m\y\ \f\a\v\o\u\r\i\t\e\ \l\i\n\u\x\ \d\i\s\t\r\i\b\u\t\i\o\n ]] + echo 'Error: Sorry, we don'\''t have instructions for your distribution yet. Please contribute on https://inkscape.org/contribute/report-bugs/ .' Error: Sorry, we don't have instructions for your distribution yet. Please contribute on https://inkscape.org/contribute/report-bugs/ . + exit 1 and the content of my /etc/os-release is: NAME="elementary OS" VERSION="5.1.2 Hera" ID=elementary ID_LIKE=ubuntu PRETTY_NAME="elementary OS 5.1.2 Hera" LOGO=distributor-logo VERSION_ID="5.1.2" HOME_URL="https://elementary.io/" SUPPORT_URL="https://elementary.io/support" BUG_REPORT_URL="https://github.com/elementary/os/issues/new" PRIVACY_POLICY_URL="https://elementary.io/privacy-policy" VERSION_CODENAME=hera UBUNTU_CODENAME=bionic I was able to build and run the project by changing the ID to "ubuntu"; however, the script says it supports Ubuntu and derived distributions, and it's not working on a derived distro from Ubuntu. I think it could happen to some distributions that don't have ID values set to the distribution they are derived from. I am new to Inkscape, and open-source projects in general. I am sorry if I am making a pointless report. Best regards, Keisuke

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Re: GSOC'20 - Introduction
by Sanjiban Sengupta 21 Mar '20

21 Mar '20

Dear Sir, This is Sanjiban Sengupta, sophomore in Computer Engineering from IIIT Bhubaneswar, India, would like to contribute to Inkscape for GSoC'20, I have practical and working knowledge of C, C++, Python and Java, for web, I am familiar with HTML, CSS, JS, Bootstrap and frameworks such as ReactJS and NodeJS, also i am acquainted with concepts of ML and AI, Linux Kernel and know the technicalities to apply these to solve modern real life problems. On going through the project proposals, I found the projects *Better CSS Style Sheet Support, Slice items, Refactoring SVG 2 Support with SVG 1.1 Fallback or Polyfills, Text and Image Support to Live Path Effect System,Path Library Improvements* interesting to work upon and contribute and thus will be thankful for your kind guidance. Thus I request the mentors to kindly guide me for the beginning processes. Regards, Sanjiban Sengupta On Sat, Mar 21, 2020 at 2:40 PM Sanjiban Sengupta <b518041(a)iiit-bh.ac.in> wrote: > Dear Sir, > > This is Sanjiban Sengupta, sophomore in Computer Engineering from IIIT > Bhubaneswar, India, would like to contribute to Inkscape for GSoC'20, I > have practical and working knowledge of C, C++, Python and Java, for web, I > am familiar with HTML, CSS, JS, Bootstrap and frameworks such as ReactJS > and NodeJS, also i am acquainted with concepts of ML and AI, Linux Kernel > and know the technicalities to apply these to solve modern real life > problems. > > On going through the project proposals, I found the projects *Better CSS > Style Sheet Support, Slice items, Refactoring SVG 2 Support with SVG 1.1 > Fallback or Polyfills, Text and Image Support to Live Path Effect > System,Path Library Improvements* interesting to work upon and > contribute and thus will be thankful for your kind guidance. > > Thus I request the mentors to kindly guide me for the beginning processes. > > Regards, > Sanjiban Sengupta > > >

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