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Re: [Inkscape-devel] Coefficients in FeColorMatrix, Fecomposite (limits, behaviour with neg val...)
by pennec victor 27 Oct '12

27 Oct '12

> Cairo does the job fairly fast and you can set up multithreading in Edit/Preferences/Rendering/ I set the number of threads to 8 some days ago and I was a bit disappointed to see no enhancement at reboot. Just forgot I set inkscape preferences file to be read-only. Fool. Now it's better :) > Basically, each filter primitive constitutes a very expensive copy of the image. Yes know that. By the way, is there any chart about CPU consumption of each primitive ? (say for 1px wide). I would say lighting is the more CPU intensive, am I right ? >(if you're really interested, I'd recommend searching the archives). Is there any other way to search the archives than the sourceforge web interface ? The UI is crappy and inefficient (or maybe I missed something obvious) > all these problems are non-trivial to solve. Maybe it lacks at least one trivial optimisation. It looks like Inkscape render all primitives even if they're not "connected" to output. Exemple Create new filter. Add a Fill => rendering is lightning fast. Add 50 blur stages with a 100 px radius => it should be slower or way slower or ssslllloooowwwweeerrr (depending on your hardware). Logical. Move the fill at the last stage of pipeline. Still slow. It shouldn't. It's uneccesary to compute any blur stage at all. You'll ask why the hell do you add unnecessary stages ? When I design filter I often ask myself "what will it looks like if I disconnect these block of 5 primitives " As adding primitive is very slow with the current interface (*) I don't remove the block but I only disconnect it. As time goes by there are more and more dead blocks and I sometimes forget to remove them. I'm not 100% sure but I think I saw dead blocks in filters fitting with inkscape * any news about this blueprint ? http://wiki.inkscape.org/wiki/index.php/SpecFilterEditorUI No ? So I should think about buying a new monitor. Mine (1920*1200) is too small for designing filters. lol

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Compiling on Windows 7 x64
by Arshdeep Singh 27 Oct '12

27 Oct '12

Hello, Unfortunately, there is some problem with the build file or something wrong with the inkscape.exe. I have tried compiling on another machine on Windows 7 x64 only to face the same problem. The problem is: the build process completes successfully without errors but the inkscape.exe runs for a few seconds (seen in the task manager) and then quits. No windows opening, no send error report messages. Just a 'inkscape.exe' process in the task manager. Compiled by following the below page word to word: http://wiki.inkscape.org/wiki/index.php/Compiling_Inkscape_on_Windows Compiler: TDM-GCC 4.7.1 Mingw32 bit edition and not the experimental 32 cum 64 bit one. I am new to development and can't seem to debug the .exe properly using gdb.exe. Please, can someone look into this. -- Arshdeep Singh

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Coefficients in FeColorMatrix, Fecomposite (limits, behaviour with neg val...)
by pennec victor 26 Oct '12

26 Oct '12

Hi, I think I'll be a little bit off topic but I don't know where to ask (my question about svg on inkscapeforum are left unanswered) Can someone point me to reference papers (or friendly forum) about coefficients in FeColorMatrix, Fecomposite ? Something that could answer the following questions : What are safe values ? For exemple inkscape UI allows x10 for k1,k2,k3,k4 in FeComposite, can I push to 255 ? 256 ? 1000000 ? I don't see anything in SVG spec about max values for those coeffs. What about neg values ? When does clipping occur ? Particularly for k4. What is the effect of a <100% opacity source or dest ? (On clipping for exemple) I try to port svg2 PorterDuff operations in svg 1 and I often get strange results (to me) with inkscape. Is there some known bugs in rendering fecomposite with neg values in inkscape ? Thx. V. Bonus question : why is inkscape so slow at rendering filters ? ;)

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Setting Up in Eclipse-CDT
by Arshdeep Singh 26 Oct '12

26 Oct '12

I intend to use Eclipse-CDT for working around the source code to understand things. If anyone can help me with it ? I import it. The C/C++ Code ananlysis results in lot of errors/warnings. I was wishing I code jump b/w linked files like we do for smaller projects in IDEs similar to Eclipse. Is something of that sort possible ? -- Arshdeep Singh Third Year, Computer Engineering Delhi Technological University Ph: +91-9654115614

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Rendering cache committed
by Krzysztof Kosiński 25 Oct '12

25 Oct '12

Hello I committed the rendering cache work in revision 10579 of trunk. If you encounter serious problems, you can turn off caching completely by defining the environment variable _INKSCAPE_DISABLE_CACHE. For example, run inkscape as: $ _INKSCAPE_DISABLE_CACHE=1 inkscape By default, each drawing will use up to 64 MB of memory for rendering data. It can be set in the "Rendering" page of the preferences (renamed from "Filters"). As usual, problem reports are welcome. Regards, Krzysztof

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Re: [Inkscape-devel] Compiling on Windows 7 x64
by Arshdeep Singh 25 Oct '12

25 Oct '12

The color-depth is 32 bit, true color only. On Thu, Oct 25, 2012 at 8:51 PM, Arshdeep Singh <moduli16@...400...> wrote: > Yes, this issue was brought up before. I have checked, it is 32 bit, true color. > > On Thu, Oct 25, 2012 at 8:29 PM, Rob Antonishen > <rob.antonishen@...400...> wrote: >> Maybe a completely offbase question. >> >> What is your screen colour depth? My notebook recently got changed to 16 >> bit colour and (a previously working) inkscape started acting exactly as you >> described. After switching back to true colour it worked again. >> >> -RobA> >> >> ----- >> "Quae dissolvi non possunt." >> >> ________________________________ >> From: "Arshdeep Singh" <moduli16@...400...> >> To: "inkscape-devel(a)lists.sourceforge.net" >> <inkscape-devel(a)lists.sourceforge.net> >> Sent: October 25, 2012 7:51 AM >> Subject: [Inkscape-devel] Compiling on Windows 7 x64 >> >> Hello, >> Unfortunately, there is some problem with the build file or something >> wrong with the inkscape.exe. >> I have tried compiling on another machine on Windows 7 x64 only to >> face the same problem. >> >> The problem is: >> the build process completes successfully without errors but the >> inkscape.exe runs for a few seconds (seen in the task manager) and >> then quits. No windows opening, no send error report messages. Just a >> 'inkscape.exe' process in the task manager. >> >> Compiled by following the below page word to word: >> http://wiki.inkscape.org/wiki/index.php/Compiling_Inkscape_on_Windows >> >> Compiler: TDM-GCC 4.7.1 Mingw32 bit edition and not the experimental >> 32 cum 64 bit one. >> >> I am new to development and can't seem to debug the .exe properly >> using gdb.exe. Please, can someone look into this. >> >> -- >> Arshdeep Singh >> >> ------------------------------------------------------------------------------ >> Everyone hates slow websites. So do we. >> Make your web apps faster with AppDynamics >> Download AppDynamics Lite for free today: >> http://p.sf.net/sfu/appdyn_sfd2d_oct >> _______________________________________________ >> Inkscape-devel mailing list >> Inkscape-devel(a)lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/inkscape-devel > > > > -- > Arshdeep Singh > Third Year, Computer Engineering > Delhi Technological University > Ph: +91-9654115614 -- Arshdeep Singh Third Year, Computer Engineering Delhi Technological University Ph: +91-9654115614

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sp-color-gtkselector
by Alex Valavanis 25 Oct '12

25 Oct '12

Hi All, Am I missing something... I can't see anything that includes the "sp-color-gtkselector.h" header. Anyone know what's going on here? Cheers, AV

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Compiling on Windows
by Jabiertxo Arraiza Cenoz 25 Oct '12

25 Oct '12

Is your problem solved Arshdeep?

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XML entity vulnerabilities
by Alexandre Prokoudine 24 Oct '12

24 Oct '12

FYI, http://blog.jondh.me.uk/2012/09/inkscape-xml-entity-vulnerabilities/ Alexandre Prokoudine http://libregraphicsworld.org

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Report from the GSOC mentor's conference
by Tavmjong Bah 24 Oct '12

24 Oct '12

Hi all, I have just gotten back from attending the Google Summer of Code (GSoc) mentor's meeting at Google's headquarters. It was quite interesting to here about other groups experiences with the program. My major conclusion from attending the conference is that Inkscape is not taking full advantage of the GSoC program. Almost everybody at the conference knew about and used Inkscape. This is in contrast to many of the other groups that I had never heard of. Given our popularity, our group of core developers seems very small. I thinks that this is perhaps why we are under-performing in GSoC; we just don't have the people to do a good job of preparing for the program. Here are some things I picked up: * Recruitment: We should be starting now! Most successful students have already had some significant experience with the software they will work on. Our two-patch rule is a good step in this direction but is probably not enough. * Application: We should have an application form with questions that test passion and competence. Here are some sample questions from other groups: - What computer do you use? - What editor do you use? - What code have you written? - Do you use IRC, mailing lists? - Do you have a mentor in mind? Have you contacted them? - Provide a time line for your work. - How well do you know Inkscape? Include a drawing you have made. - What vacations/exams will overlap with the GSOC period? Indirect questions work best. The "Why do you want to work for us?" questions aren't very useful. The application should test the ability to read and follow instructions. * Coding period: Require frequent and public discussions. Public discussions work best as then there are multiple people who can answer questions. Some groups have two mentors for each project. This is especially helpful when time-zone issues make communication difficult. Require frequent commits. It is important to gauge a student's progress as well as insure the quality of the code. A number of projects use websites that allow easy commenting on the code by reviewers: http://codereview.stackexchange.com/ github has code review built in Weekly status reports. Merge code for final pass. Be tough!! * Links to a few other projects: https://www.gnu.org/software/hurd/community/gsoc/student_application_form.h… https://drupal.org/node/59037 http://www.di.ens.fr/~baghdadi/TXT_blog/5_advices_to_get_your_proposal_acce… Tav

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