- Inkscape Devel - Inkscape Mailman

Janitorial Tasks
by Victor Westmann 03 Oct '16

03 Oct '16

Hi everyone. I'd like to help the project (and get my feet wet) doing some of the Janitorial Tasks. However I'm a Windows user and I got stuck getting the code from bazaar. Is it possible for me to help you guys (after getting some help) or never mind? Please let me know your thoughts on how can I help with code. --Victor Westmann

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Compiling sax parser on Windows
by Adrian Boguszewski 02 Oct '16

02 Oct '16

Hi there, I finished sax parser project and I need to test it on Windows. Unfortunately I can't compile it. Is anybody here, who builds Inkscape on Windows and could check my changes, especially loading different file types? To detect file type I use a mime type of file from Gio library. I want to know if the content type is the same as on linux. Precisely: "image/svg+xml", "application/xml" or "text/html" for uncompressed svg, xml and html files and "image/svg+xml-compressed", "application/x-gzip" for svgz. Compiling, running and opening different files is sufficient to know that everything is ok. If there are no warnings of course. Branch to compile: https://code.launchpad.net/~adrianboguszewski/inkscape/sax-parser Thanks! Best regards, Adrian

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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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Code complexity survey
by Vard Antinyan 22 Sep '16

22 Sep '16

Dear inkscape developers, We have undertaken a task to assess code complexity triggers and generate recommendations for developing simple and understandable code. Our intension is to share the results with you, developers, so everyone can learn the triggers behind complex software. We need your help for rigorous results. My request to you is - if you get 5-10 min. time, would you please consider to answer the questions of this survey on code complexity? https://goo.gl/forms/h9WXZ8VSEw7BUyHg1 You are welcome to learn preliminary results through this link: https://www.facebook.com/SoftwareCodeQuality/photos/?tab=album&album_id=163… The results will be shared in a public webpage and everyone possible will be invited to learn and discuss them. Your knowledge and experience is vital for achieving substantial and generalizable results, and your effort is much appreciated! Sincerely Vard Antinyan PhD candidate in University of Gothenburg, Sweden Tel: 0046317725707

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Gimp to SVG · Batch Mode
by Jabier Arraiza 12 Sep '16

12 Sep '16

Hi, I just commit a github to export images to SVG. Currently support: Batch mode (GUI and Command line) Export jpg, png,gif,bmp,tiff Export a XCF files (With nested layers, text as image or text...) https://github.com/jabiertxof/Gimp-to-SVG I hope you like it. Cheers, Jabier.

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