September 2016 - Inkscape Devel

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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Turned off Github Issues
by Martin Owens 05 Oct '16

05 Oct '16

Dear all, Hopefully this won't effect anything, but the not-yet in use github page had it's issues tracker switched on and was collecting bug reports. https://github.com/inkscape/inkscape I've gone ahead and switched it off, but there was 10 or so issues that we may have to think about translating to launchpad. Best Regards, Martin owens

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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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YAML (libyaml-dev, libyaml-0-2) version >= 0.1.7-1 becomes hard dependency for inkscape
by Dmitry Zhulanov 29 Sep '16

29 Sep '16

I'm going to merge in my "xverbs" branch which requires YAML. So it's still possible to guard all code behind a WITH_XVERBS if we cannot add that lib as a hard dependency, but in the current state of things yaml would become a hard dependency of inkscape. If anyone has any problems with that (compatibility on some platforms maybe?), please tell before the merge Best regards, Dmitry Zhulanov

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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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Introduction
by Justin LaRose 25 Sep '16

25 Sep '16

Hello All - I wanted to take a minute to introduce myself on here, my name is Justin LaRose and I hope to soon be a contributor and start working on some code. I've worked mainly with C# and Visual Basic in the past but am looking forward to working with C++ and learning more about it. I was having some issues with dependencies when trying to build the developer instance on my laptop (Ubuntu 16.04) and was wondering if anyone might have some time to help me get everything built so I can start to work on some bugs? I'm looking forward to getting to know everyone better as I learn more about the project and the code base. Thanks! Justin LaRose

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Here's a crashing .svg file
by Miguel Lopez 24 Sep '16

24 Sep '16

I'm just gonna leave a crashing .svg file here for developers to look at since it been crashing upon opening, and I was using mirror, rotate copies extension. It crashed when I attempted to scale the entire watch, and then I couldn't open earlier version of the watch. Oh, and I think that arrange tool might need a "center of page" instead of having to type in axis for the rotate part. That would make this watch a lot easier. Other than that, I'm really liking where Inkscape is getting at. I must say that I am using it alongside with Illustrator to get the best of both world.

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pen+pencil, shape: from clipboard, color (last used style) don't work
by Kerstin Marzina 24 Sep '16

24 Sep '16

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