June 2016 - 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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Inkscape for embroidery
by Michael Soegtrop 26 Nov '16

26 Nov '16

Dear Inkscape Developers, I added a few features to Inkscape for use in embroidery, because the commercial tools available don't offer the artistic flexibility I want. I would like to have your opinion on if you think it makes sense to integrate such functionality into the Inkscape mainline, or if it would be too much of a stretch. It boils down to some LPEs and an export format. The commercial tool I have from Bernina (a Swiss sewing machine manufacturer) is based on Corel Draw. Below is a list of the additions I did / I am working on. Please let me know what you think about this. With these additions, Inkscape offers substantially more flexibility than affordable commercial SW (and affordable here means 500..1000$). Best regards, Michael 1.) Ways to fill an area with clusters of contours Inkscape already offers 2 path interpolation LPEs which allow this. I plan to add a 3rd one which creates a set of equidistant inset/outset paths. 2.) A way to connect sub path of a path into one continuous path I added an LPE to do this with various options of end interpolation. Maybe if I use bool-ops I need to extend it with some sort of sorting, cutting and auto reversing mechanism to keep the connections short. 3.) A way to cut a path into stitches (straight line segments) in a controlled way. I added an LPE to do this, but it is quite primitive as yet. 4.) Bool ops on paths because in embroidery you cannot simply hide an object below another one. I just added a bool-op LPE for this - needs some additional work to cut contours against a closed path. 5.) A tool to convert graphics output to some format an embroidery / sewing machines can read. I wrote an external tool to convert HPGL to a common embroidery format (stitch/DST), but could also integrate this into Inkscape. 6.) Maybe a tool to hide connections between path segments below filled areas. For a sewing machine it is quite complicated to do a "pen up" - it has to cut the threads, so one typically hides connection paths below some embroidery to avoid thread cutting. Currently I do this semi-manually. Doing this automatically might be quite complicated.

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Thanks for your votes! We have our new "Draw Freely" font!
by C R 02 Nov '16

02 Nov '16

And the winner (by quite a bit, actually) is Euphoria Script! Thanks to everyone for the votes and helping us choose a new open font. The new font will be deployed to the website and relevant graphics. You can start using it now in your inkscape-related materials by downloading it here: (includes font and ofl license files). http://www.opendesignstudio.org/inkscape/euphoria_script.zip Have fun, and thanks again for the help! -C

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performance problems and possible remedies?
by Yale Zhang 29 Sep '16

29 Sep '16

Hi. I'm using Inkscape to author a comic and the slow speed for certain things is very annoying. I'm already have OpenMP turned on and using 4 cores. 1. *large blurs are slow* - I'm an expert with writing SIMD code, so I was thinking about vectorizing the Gaussian IIR filter with SIMD intrinsics, even though it's harder than for a FIR. But I noticed there isn't any SIMD code in Inkscape so does that mean it's something to avoid. I'm pretty sure no current compiler is smart enough to vectorize it, and besides, Inkscape is compiled with -O2, meaning -ftree-vectorize isn't on by default. 2. *when there's a large image (raster based) background - scrolling in a zoomed region is very slow* I compiled the latest 0.49 code with GCC profiling and it shows this: 33.98 22.47 22.47 exp2l 21.29 36.55 14.08 log2l 17.57 48.17 11.62 pow 7.12 52.88 4.71 658 0.01 0.01 ink_cairo_surface_srgb_to_linear(_cairo_surface*) 6.72 57.32 4.44 563 0.01 0.01 ink_cairo_surface_linear_to_srgb(_cairo_surface*) 5.51 60.96 3.64 1216 0.00 0.00 Inkscape::Filters::FilterGaussian::~FilterGaussian() 5.23 64.42 3.46 internal_modf 0.59 64.81 0.39 _mcount_private 0.41 65.08 0.27 __fentry__ 0.12 65.16 0.08 GC_mark_from 0.09 65.22 0.06 5579 0.00 0.00 Geom::parse_svg_path(char const*, Geom::SVGPathSink&) 0.06 65.26 0.04 35320 0.00 0.00 bounds_exact_transformed(std::vector<Geom::Path, std::allocator<Geom::Path> > const&, Geom::Affine const&) 0.06 65.30 0.04 8 0.01 0.01 convert_pixbuf_normal_to_argb32(_GdkPixbuf*) 0.05 65.33 0.03 885444 0.00 0.00 std::vector<Geom::Linear, std::allocator<Geom::Linear> >::_M_fill_insert(__gnu_cxx::__normal_iterator<Geom::Linear*, std::vector<Geom::Linear, std::allocator<Geom::Linear> > >, unsigned long long, Geom::Linear const&) The cost is absolutely dominated by ink_cairo_surface_srgb_to_linear() and ink_cairo_surface_linear_to_srgb(). My first instinct was to optimize those 2 functions, but then I thought why are those even being called every time I scroll through the image? Why not convert the images up front to linear and stay that way in memory? If that can't be done, then my optimization approach is: 1. replace ink_cairo_surface_srgb_to_linear() with a simple 3rd degree polynomial approximation (0.902590573087882 - 0.010238759806148x + 0.002825455367280x^2 + 0.000004414767235x^3) and vectorize with SSE intrinsics. The approximation was calculated by minimizing the square error (maxError = 0.313) over the range [10, 255]. For x < 10, it uses simple scaling. 2. replace ink_surface_linear_to_srgb() with a vectorized implementation of pow(). Unlike srgb_to_linear(), a low degree polynomial can't be used due to the curve having larger high order derivatives. An alternative would be piece wise, low order polynomials. The main question I have is what degree of accuracy is desired? Certainly, it doesn't need double precision pow() since the input is only 8 bits! Is +- 0.5 from the true value (before quantization) OK or do people depend on getting pixel perfect results? UJ

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xverbs
by Dmitry Zhulanov 26 Sep '16

26 Sep '16

Hi, all! Im a game developer and using the inkscape for layouting my game screens. Loading_screen_layout.svg one of them. It have g with id pause_button and rect with id sandclock_bound which I use for animation placement. The verbs feature which inkscape already have is have some limitations. The MAX_PATH for example. Also some verbs required user interactions, so I need some eXtended verbs here. Using python script I have load layout as xml and collecting element-id's of interactive elements with "onclick" attribute, for example. Using this element-id list I generate .yaml, which is some sort of batch file. Here is the .yaml file which is used with Inkscape to clean up layout and put button image in separated file with pause_button.svg filename. Also I count undoable actions to restore state generating verb EditUndo. command: inkscape -B loading_screen_layout.yaml ----------- loading_screen_layout.yaml --------- run: - xverb-id: XFileOpen, loading_screen_layout.svg - xverb-id: XUndoLabel, fresh_document - xverb-id: XSelectElement, pause_button - verb-id: EditInvert - verb-id: EditDelete - verb-id: FitCanvasToDrawing - xverb-id: XFileSaveAs, pause_button.svg # save with stupid name - xverb-id: UndoToLabel, fresh_document - xverb-id: XSelectElement, pause_button - verb-id: EditDelete - xverb-id: XUndoLabel, fresh_document - xverb-id: XSelectElement, sandclock_bounds - verb-id: EditDelete - xverb-id: XUndoLabel, fresh_document - xverb-id: XFileSaveAs, loading_screen_layout_release.svg # save with stupid name - verb-id: FileQuit ------------------ CUT HERE -------------------- I guess you can get readonly access on my launchpad page. https://code.launchpad.net/~dmitry-zhulanov/+junk/inkscape-xverbs Code is tested with mingw+windows7+VS2010 sdk. If you would like to merge the feature, I will clean up code to conforming code style, remove printf's & so on Any help or advice are appreciated! P.S. sorry for my bad english :) Best Regards, Dmitry Zhulanov

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Stroke to path
by Jabiertxo Arraiza Cenoz 02 Sep '16

02 Sep '16

Hi to all. This is a requets tor change "path->stroke to path" menu item to another definition -string- based in a new code. My proposal is path->to path This new code basicaly do a convert stroked item to path retaining paint-order, fills and markers. The patch is here: https://bugs.launchpad.net/inkscape/+bug/1556592 Cheers, Jabier.

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Doc scaling compatibility issue (Bug 1389723)
by Bryce Harrington 26 Aug '16

26 Aug '16

What do you think we should do about the release-critical DPI bug? We need a decision on a course of action. One of the changes we're bringing in this release is changing the definition of px from 90 dpi to 96 dpi, but a consequence of this is that documents created in 0.91 or earlier will become mis-scaled if used in 0.92. This is tracked in the following bug report: https://bugs.launchpad.net/inkscape/+bug/1389723 This is a release-critical bug, the sort that is likely to become a thorn in our side in the near to mid term as users start running into it more and more. Longer term it will diminish as our users move to newer versions, but I imagine it'll take multiple years before it goes away completely. I don't think we should consider reverting the change; it was introduced pretty early on this development cycle so backing it out could cause secondary bugs to crop up. Also, it's a change that has to be done, so if we don't do it this release we'll have to go through all the trouble again next release anyway. One proposed approach is to detect the affected files on load and display a warning with a recommendation to convert the file manually. Javier has posted a conversion tool that could be made use of; it's received a fair bit of testing but there may be some remaining corner cases to sort out; on the plus side with it being a discrete utility fixes could be rolled out for it without needing full Inkscape releases. The other proposed approach would be for Inkscape to internally convert files, so that no warning is needed. In theory this would provide a better user experience, but is going to require a lot more developer effort and thorough testing. I'm doubtful that all of this can be done adequately within the timeframe we're looking at for the release. Both approaches also require a mechanism to detect affected files, which sounds like it may be the tricky part here, as our SVG documents haven't had versioning information we could rely on for this case. Do you have thoughts on other ways to address this issue? Do you have a strong opinion on whether for this release we should use the expedient approach or else postpone the release until the more user-friendly approach can be developed? Or should we reconsider a revert of the DPI switch so we can get the release out and re-enable it post-release in hopes the issues can be worked out? Bryce

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Request for Comments on an Idea - Rendering Tests
by Shlomi Fish 19 Jul '16

19 Jul '16

Hi all! Do you think it would be a good idea to make Inkscape's test suite more comprehensive by making sure some (= as many as we can) input SVGs result in the same bitmap images after being rendered by --export-png? It won't be too hard to implement, and may prevent regressions. Regards, Shlomi Fish -- ----------------------------------------------------------------- Shlomi Fish http://www.shlomifish.org/ Humanity - Parody of Modern Life - http://shlom.in/humanity <ew73> VB.NET is all of the fun of enforced privacy OO with all of the power of BASIC. — Freenode’s #perl Please reply to list if it's a mailing list post - http://shlom.in/reply .

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Account request on the wiki
by Sylvain Chiron 10 Jul '16

10 Jul '16

Hello all, I'm a quite new (several months have gone now…) French translator for the project, stealing progressively all the translation tasks to Mr jazzynico. I also work a little on the website project. I would like to get an account on the wiki, to be able to write glossary info for French as a first reason, because such a glossary would be very useful to other translators and I like to share the core nodes of my work. Other reasons would be trying to update/improve pages or correct their little mistakes, as I can't bear working with mistakes, obsolescence and non-compliance without attempting to correct them (I love the wiki system for that). Please set Frigory as my username. Thank you; regards, -- Sylvain Chiron

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Board meeting June 3rd
by Bryce Harrington 02 Jul '16

02 Jul '16

Reminder that our June board meeting will be this Friday in #inkscape-devel at noon Pacific time. http://wiki.inkscape.org/wiki/index.php/Board_Meetings Agenda is above. There were a lot of action items out of the May meeting, so please doublecheck on your tasks and come ready to report. There will be an informal 0.92 release meeting after the board meeting (1pm US pacific time). Potential topics include a run through of release critical bugs, the about screen contest, translation work, platform packages of the release candidate, etc. Thanks, Bryce On Sun, May 08, 2016 at 01:22:35PM -0700, Bryce Harrington wrote: > On Tue, May 03, 2016 at 12:34:18PM -0700, Bryce Harrington wrote: > > May's meeting is coming up. It'll be in #inkscape-devel at noon Pacific > > time (2000 UTC). > > > > http://wiki.inkscape.org/wiki/index.php/Board_Meetings > > > > This will be a good opportunity to debrief from the hackfest and > > identify followup actions that the board should work on in coming > > months. > > > > Bryce > > Thanks everyone for attending, that ended up being an impressively > productive meeting. I've gone through the meeting log and pulled out > action items: > > http://wiki.inkscape.org/wiki/index.php/Board_Meetings > > I've penciled in Friday, June 3rd as our next meeting, and jotted in an > agenda to followup on a number of the items we touched on this week. > > Bryce > > ------------------------------------------------------------------------------ > Find and fix application performance issues faster with Applications Manager > Applications Manager provides deep performance insights into multiple tiers of > your business applications. It resolves application problems quickly and > reduces your MTTR. Get your free trial! > https://ad.doubleclick.net/ddm/clk/302982198;130105516;z > _______________________________________________ > Inkscape-board mailing list > Inkscape-board(a)lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/inkscape-board

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