- Inkscape Devel - Inkscape Mailman

Offsetting elliptical arcs
by Markus Engel 10 Oct '13

10 Oct '13

Hi devs, I changed the code that generates ellipses and arcs to using true elliptical arcs instead of cubic Bezier curves. Now there's a little problem: When you create for example a pizza slice and a linked offset, you will see that elliptical arcs are somehow "degenerated", i. e. the number of points decreases with increasing radius. (https://bugs.launchpad.net/inkscape/+bug/1236830) Note that the code for offsetting elliptical arcs has been there for quite some time. I'm not sure now whether this is how "offset" is intended to work. What do you think? Regards, Markus

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Re: [Inkscape-devel] W3C SVG test suite and trunk
by Tavmjong Bah 09 Oct '13

09 Oct '13

On Wed, 2013-10-09 at 11:28 +0200, Guiu Rocafort wrote: > 2013/10/9 Tavmjong Bah <tavmjong@...8...> > > > > On Wed, 2013-10-09 at 00:51 +0200, Guiu Rocafort wrote: > > > Hi ! I've been looking at the GSOC and after solving a few problems I > > > can run the tests now. Now I have to find out a way to update the > > > tests. > > > > I was able to run the tests without too much trouble... however I did > > not have a set of "good" PNGs to test against... so I gave up and went > > back to using the latest SVG 1.1 test suite. > > > > To update the tests, I think you just need to put the new SVG files into > > the directory with the existing SVG files and then create reference PNGs > > in the appropriate files (known good rendering, known bad rendering). > > You can't just use the reference PNG files from the SVG test suite for > > doing automated pixel-by-pixel comparison as the results depend on the > > font used. (The SVG2 test suite will use a WOFF font, I think, to avoid > > this problem.) The existing files from the SVG test suite should be > > replaced by the files from the latest version of the SVG 1.1 2nd Ed test > > suite. > > I see, I wasn't aware of that problems with the fonts. Is the problem > related to the use of the SVGFreeSans font ? I saw this font in some > tests so I'm guessing it's being used in all of them. I noticed this > font is not in my system, so installing it in the machine is going to > perform the tests should solve the problem ? No. A search through the SVG files shows all kinds of different fonts being used. SVGFreeSans is required for some tests as is a number of other specially constructed fonts. > But since we're maybe going to use that ppa automated thing to perform > the tests that probably is not an option. Would it be safe to replace > all the fonts in the test by one of these safe fonts ? [1] No. If you look carefully you'll see that each proposed font-family is actually a list of fonts. For example: "Times New Roman", Times, serif. If the first font "Times New Roman" isn't found, then Times is search for. If that is not found then the generic fallback font serif is used. While "Times New Roman" and Times are similar, they are not exactly the same. For the use on the web they are probably acceptable equivalents but for pixel by pixel comparison, they wont work. The solution is to generate the PNG reference images on the same machine that the tests are going to be run on. Then the same font will be used for both the reference and the test images. > Tavmjong, i saw you're running some tests in [2], so, how are you > solving these font problems ? > > [1] http://www.w3schools.com/cssref/css_websafe_fonts.asp > [2] http://tavmjong.free.fr/INKSCAPE/W3C_SVG_0.49/htmlInkscapeHarness/index.html I look at each test manually and just filter out the differences in font. This is OK for a once in a while check but not for automated testing. Also, a few of the text tests really do need special fonts (found in the 'resources' directory). > > > I've set a personal branch in my launchpad account with the changes I > > > made to the original code. > > > https://code.launchpad.net/~neandertalspeople/+junk/inkscape-testsuite > > > > > > > > > After updating the test I'll try to find a way to automate the tests, > > > and perform them regulaly. What do you think about that ? Any idea > > > about how that could be done ? Maybe it is possible to set some kind > > > of trigger when there is a commit in the launchpad inkscape trunk ? > > > > This would be awesome. > > > > Tav > > > > > > > > > > Guiu >

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Ellipses, Circles, and Arcs, oh my!
by unknown＠example.com 08 Oct '13

08 Oct '13

Hi, I see some action on rewriting Inkscape's General Ellipse code. It would be very nice if Inkscape could directly create the SVG circle and ellipse elements rather than use the SVG path element. I realize that this may be outside the scope of the current work but there is one thing that I should bring attention to: The SVG Working Group decided to allow markers on SVG shape elements.[1] Inkscape will actually already draw markers on shapes if there already are markers placed on the shapes in the SVG file (but doesn't draw them "correctly"), however Inkscape does not allow one to add markers to shapes through the GUI. (I'm sure that the drawing of the markers is accidental and not intentional.) It was fairly clear to the SVG WG that for rectangles, there are four markers (one for each corner) and for rounded rectangles, there are eight markers (one at each start and end of a corner arc). See attachment.[2] It wasn't as clear what to do for circles and ellipses. The group decided that there should be four markers on circles and ellipses, located at the 0, 90, 180, and 270 degree points. Inkscape currently represents circles and arcs as two path elliptical arc segments. In order to have four markers, it should be using four elliptical arc segments. I also noticed that the Object->Path command converts a circle/ellipse to a path using eight Bezier curves (and would thus have eight markers). It seems to me that it should be converting to four elliptical arc segments. (After all, converting a rectangle to a path doesn't produce four straight Bezier curves!) Tav [1] http://www.w3.org/2013/06/03-svg-minutes.html#item03 [2] Top row: expected behavior, bottom row: test. Green: Start marker, Yellow: Mid marker, Red: End marker.

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Please Remove Dev Website
by Martin Owens 05 Oct '13

05 Oct '13

Hey Devs, We still have dev.inkscape.org running, I think we should shut it down since staging.inkscape.org takes over from that. I only just noticed because dev is appearing in google search results for inkscape downloads. I forget where it's being hosted though. Ian? Martin,

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More C++ify?
by Johan Engelen 04 Oct '13

04 Oct '13

Hi Markus, all, Markus has done a great job of C++ifying a ton of our C-classes, but... there are still a few left. knot.h display/sp-canvas-item.h ... Are we taking up that task too? :-)) Cheers, Johan

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Changing SpinEdit width
by Yann Papouin 04 Oct '13

04 Oct '13

Hi, For my daily use of Inkscape, SpinEdit controls are too small for quick value reading. http://ftpmerou.free.fr/inkscape/inkscape-widget-size.jpg I'm would like to know where their min width is set. I took a look into "src/widgets/widget-sizes.h" and trying to change these values but even after a clean build it does not seems to have any effect : #define AUX_SPINBUTTON_WIDTH #define AUX_SPINBUTTON_WIDTH_SMALL #define AUX_OPTION_MENU_WIDTH #define AUX_MENU_ITEM_WIDT

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select node fron pathvector
by Jabiertxo Arraiza Cenoz 04 Oct '13

04 Oct '13

Hi to all. Im attemping to get a node element from a Pathvector. Anybody know what to do? I find this obsolete function "sp_nodepath_get_node_by_index". Thanks in advance, Jabier.

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Report #10
by Vinícius dos Santos Oliveira 03 Oct '13

03 Oct '13

So, GSoC coding period is over and now is documentation period. I've sent two more commits to the Inkscape repository earlier today. Nathan convinced me to think "why is the project great?" and then I decided to make two more videos (mic is bad, but understandable, I think): https://vimeo.com/75245148 https://vimeo.com/75247946 My strong accent is bad, but I don't have much people to talk to in english, so you guys will need bear it. I hope you guys like the videos. Tell me if this happens. =) So, this is "documentation week" and I'll write more blog posts regarding technical details (and group them under some folder in the repository). I'll also write the so wanted tutorial (I accept hints about its format). After the week is over, so is GSoC 2013 and my responsibilities will move from "GSoC 2013 student" to "lib2geom and Inkscape developer". The first thing I should do is unify the construction of d attributes of path elements and move this abstraction to the 2geom library, then Inkscape and libdepixelize will share more code (always a good thing). Second thing I'll do is prepare a new stable release of 2geom (need to be discussed with the other of you devs) and create a package for the ArchLinux User Repositories. So, something to tease you guys. Me and Nathan (this guy always have ideas. lucky me for having him as mentor) have some ideas about how to improve the Kopf-Lischinski image quality and we decided to publish a paper. Another cool three-months project to work on. I may finish the harmonic maps triangulation (and put it inside 2geom) before implement the new cool ideas. Anyway, I'll have to delay this project for one week, because the community of my other open source project misses me and have some issues demanding my attention. So, another thing: if you guys have a hand-chosen collection of pixel art images with Alpha Channel, please send me. They will help me in the research project. Jabier did the first step and send me a bunch of this images already, but the more the better (and mainly if they are carefully chosen one-by-one). It was an awesome experience to work with the Inkscape community. -- Vinícius dos Santos Oliveira https://about.me/vinipsmaker

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Staging Website: Offline for Upgrade
by Martin Owens 03 Oct '13

03 Oct '13

Hey devs, This is only the staging server, so I'm only letting devs know. The staging server is down while I move us from apache2 to enginx; most of the work is complete already, there's just some last minute configuring to do. Hopefully I'll be ready to release some cool features by the start of next week. Martin,

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GSOC 2013 Results
by Tavmjong Bah 02 Oct '13

02 Oct '13

The 2013 version of Google Summer of Code has ended. All five projects were successful. Congratulations students (and mentors)! The projects were (* indicates code already merged with trunk): 1) An interactive tool for recoloring artwork. Arshdeep Singh (demicoder), mentored by Ted Gould.[1] 2) Improved units support and consolidating units handling to one place.* Matthew Petroff, mentored by Johan Engelen.[2] 3) Electronics CAD support, focusing on improving connectors and symbols. Sebastian Götte (jaseg), mentored by Tavmjong Bah.[3] 4) A new dialog to create documents from templates.* Jan Darowski (Slagvi), mentored by Krzysztof Kosiński.[4] 5) A new raster-to-vector algorithm focusing on small images.* Vinícius dos Santos Oliveira (vinipsmaker), mentored by Nathan Hurst.[5] The new raster-to-vector algorithm even has a new tutorial included inside of Inkscape! I would like to remind students that haven't already done so, to upload their sample code submissions. This can be done on your Melange project page. Tav [1]https://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/arshd… [2]https://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/mpetr… [3]https://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/jaseg… [4]https://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/slagv… [5]https://www.google-melange.com/gsoc/proposal/review/google/gsoc2013/vinip…

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