- Inkscape Devel - Inkscape Mailman

Making an LPE
by unknown＠example.com 18 Aug '07

18 Aug '07

Hi all, Just wanted you all to know there is now a Wiki page explaining how to create a LivePathEffect: http://wiki.inkscape.org/wiki/index.php/MakingLivePathEffects If anything is unclear, please let me know! Cheers, Johan

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Question about the back-end renderer
by joel＠...1709... 18 Aug '07

18 Aug '07

So I'm currently seeing if a windows explorer thumbnail extension for SVG files is possible. This is achieved by writing a small COM object (encased in a DLL) which is loaded by windows and which paints the thumbnail of the file into an HBITMAP on demand. Initially I thought that I could just load up the cairo shared library, and render the SVG with that - except I've just found out that cairo itself doesn't render SVGs; you need librsvg to do that. Obviously we shouldn't add this dependancy, especially considering inkscape already has a renderer. So I'm wondering if it's possible to load the inkscape renderer in a shared library. Question: How does inkscape and inkview work? Do they just load up a libinkscape shared library? If so, then my extension could load this same library, and get it to do the drawing. But does the library even exist any more? I can't see inkview in the daily builds at the moment (has it been withdrawn?), and certainly no libinkscape - I assume it's static linked to inkscape.exe now. But if such a library existed, I think I could use it to make thumbnails quite happily; although it would be quite bulky library to load. Any suggestions? Joel

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sp_export_X_utf8
by Christopher Kerr 18 Aug '07

18 Aug '07

I'm trying to add an --export-emf command line option to inkscape. Having read through the relevant source code on Doxygen, I do not quite understand why some export options have a second global variable with a _utf8 suffix, and some do not. (To be precise, png and svg do, while ps, eps and pdf do not). What do these utf8 duplicate strings do, and (more immediately important to me), should I add one for my new --export-emf option? The variables are all defined, and only used, in src/main.cpp - http://inkscape.modevia.com/doxygen/html/main_8cpp.php

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first try of lpe
by bulia byak 18 Aug '07

18 Aug '07

rev 15810: - open share/examples/live-path-effects-skeletal.svg Problem: the file does not demonstrate the end result! It just has the untransformed fish, the arc to apply it to, and some texts. An example file must show the capability, not just lead you through a tutorial (though that is nice too). - select the single-path fish, ctrl+c - select the arc path above "3", open the lpe dialog Problem: the first thing I see in the dialog is "Invalid effect". That's a really bad idea. I didn't do anything yet! Why are you proposing that I apply an invalid effect to the path? What is it anyway? Problem: the dialog does not stay on top! Click on canvas and it sinks. Did you use the standard Dialog class for it? If you did it should take care of that. - select skeletal strokes (btw why strokes and not stroke?) and cilck apply Biggest problem: the path simply disappears. - undo Console warnings indicate missing sp_documen_done somewhere: ** (inkscape:19449): WARNING **: Incomplete undo transaction: ** (inkscape:19449): WARNING **: Event: Set attribute d to "" on #<Element:0x0x88b29f0> What am I doing wrong? -- bulia byak Inkscape. Draw Freely. http://www.inkscape.org

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Boost for win32
by Bob Jamison 18 Aug '07

18 Aug '07

Hi all, I built Boost with Mingw last night, to help the guys with their new additions to Inkscape. Here it is: http://inkscape.modevia.com/win32libs/boost_1_34_1-mingw411.7z As you can see, it is enormous (28MB). Do we really need Boost, and is it worth doubling the size of the lib bundle? bob

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What to write to font-specification
by Gail Banaszkiewicz 16 Aug '07

16 Aug '07

So as some of you already know, we will be storing more complete font information in the style string so that Inkscape can (eventually) do more than what CSS can represent. However. we need to carefully choose exactly what this information will be. It was suggested previously that we use the system font name, which I was going to use pango to retrieve (http://www.gtk.org/api/2.6/pango/pango-Fonts.html#pango-font-description-to…). However, this function produces almost the same answer as pango_font_description_to_string(), so it's probably just as easy to use that function. I believe this could be reasonable if we trust that pango will not change how this is written (because if they do, we have to make a font-specification-v2 or something). There is another disadvantage: Pango doesn't support anything that CSS doesn't. For quite a long time I thought I could get around this because when pango finds fonts on the system, I was able to print out the information about even the non-CSS styles. Unfortunately, we are currently very dependent on the PangoFontDescription structure, and once this structure is obtained from this point on, we lose all non-CSS information. There are two things I would like to look into in the future: first, whether we can around this super-dependence on that structure and could use instead somehow the PangoFontFace structure that seems to contain all needed information; and second, perhaps contributing to pango and/or finding out why they don't have more general font support. Anyway, so the reason for this email is to get some of your ideas on what you think we should put into font-specification. Tell me why too! Thanks, Gail

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bug #1774456: snapping
by Felipe Sanches 16 Aug '07

16 Aug '07

I have compiled revisions 15637 and 15638. Revision 15638 introduced the bug #1774456 Log: "Rearrange snapping preferences, put distinction between paths and nodes back in, and a bit of refactoring" Juca

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LPE committed to trunk!
by unknown＠example.com 15 Aug '07

15 Aug '07

Hi all, I just committed LPE to trunk. I have chosen to put the necessary 2geom files into inkscape svn, and build them together with inkscape. Windows building works fine, and Linux aswell! :) One must download Boost, but it seems only 3 files are needed. concept_check.hpp, format.hpp and optional/optional.hpp. I think this means only the boost base is needed and the "optional" package. No harm downloading all though... http://www.boost.org/ (please note I did not test this, I downloaded the complete boost package) I updated the LPE build info on the wiki, if you have trouble building: http://wiki.inkscape.org/wiki/index.php/LivePathEffects#BUILDING_THE_BRANCH Really hope I did not break building! Cheers, Johan Note 1.: There are some warnings on Linux, because of duplicate entries in the makefile. I do not know why 2geom is put twice in the makefile. Note 2.: I had to exclude extension/internal/bitmap/*.* in build.xml to get Inkscape built (trunk rev 15177, so without LPE changes)

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bounding box
by Felipe Sanches 15 Aug '07

15 Aug '07

hi! I have a doubt. How do I read the bounding box coordinates from within a NR::FilterPrimitive ? (I think that) I need this to implement the feImage filter primitive Juca

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Re: [Inkscape-devel] Multithreading (with TBB)
by Dennis J Lin 15 Aug '07

15 Aug '07

Salutations! >However, as for diagonal scrolling, I had an impression that the >existing code in sp_canvas_paint_rect already addresses this: [snip] >So, can you please provide more details on your approach? Actually, the problem is earlier. A diagonal expose event dirties a L-shaped region of tiles. Then, in 2036 static int 2037 paint (SPCanvas *canvas) 2038 { we have 2060 if ( canvas->tiles[tile_index] ) { // if this tile is dirtied (nonzero) 2061 dirty = true; 2062 // make (pl..pr)x(pt..pb) the minimal rect covering all dirtied tiles 2063 if ( i < pl ) pl = i; 2064 if ( i+1 > pr ) pr = i+1; 2065 if ( j < pt ) pt = j; 2066 if ( j+1 > pb ) pb = j+1; 2067 } which forces a full-screen redraw. My solution was to use a Gdk::Region to construct a better region for redraw. I was also thinking of getting rid of canvas->redraw_aborted altogether, and just not "cleaning" the dirty tiles until the redraw actually happens. I think that this way, we will be prepared for simultaneous dirty/redraw events. (My work so far doesn't do that yet -- it does the rendering in parallel, but blocks the main thread.) Alternatively, we can upgrade (and probably rename) the canvas->redraw_aborted to a Gdk::Region (or a GdkRegion -- what's preferred?) and forget about the tiles. We will probably want to divide by TILE_SIZE to avoid redrawing 1-pixel areas. >> Is the intent to move everything to Cario in the near future? > >Yes. Certainly. However, as planned now, the move to cairo will not >get rid of nr-arena-shape. We plan to just remove the rendering calls >to livarot methods and reduce the lots of extra buffers that are now >created and then composed. Instead we'll just use cairo calls to draw >shapes in a single buffer. See the outline mode which is now drawn >entirely by cairo - the regular mode will be similar except a lot more >code will be needed to translate gradients, patterns, etc. to cairo >format. Ok. I was wondering if there was a going to be a massive rewrite to C++ or something. >I don't think they realistically will be rewritten in the near future. >At least sp-canvas seems to be more or less adequate for our needs, >with or without cairo. Yeah, the odd thing is that the sp-canvas seems to hold only 3 items -- one is the canvas-arena with everything else and there are two SPCtrlRects. This seems like a bit of duplication of effort. (This doesn't bother me right now, but we should probably merge the two sometime before/during when we allow scene to change while we are rendering.) >> Finally, I would like to gauge the interest in this work. What are your sentiments on multithreading in general, and in using TBB to do in particular? > >We know we're in a rather bad shape with regard to multithreading :) >But there's certainly a lot of interest for exploring what can still >be done to improve the situation. Cool, I'll definitely package up everything I've done by Friday, and we'll see how busy school gets ;-) Dennis Lin

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Re: [Inkscape-devel] Multithreading (with TBB)
by Dennis J Lin 14 Aug '07

14 Aug '07

Salutations! (Sorry if the threading is wrong, I'm working with a webmail client right now.) >I think the current status is that we're not very thread safe :) I >guess my concern is that probably the first step for us isn't >implementing TBB. The first step is getting everything cleaned up so >that implementing TBB is a reasonable next step. I agree with you, but I wanted to have something to show, so I decided to tackle the rendering portion (which can take several seconds for a heavily filtered image like car.svgz.) So right now, I have a version that can render to different regions of the screen at the same time (there are locks protecting nr-arena-shape, so there is potential contention.) > >As far as TBB itself goes, is it in any distros? How does it work with >the whole Glib main loop? Perhaps implementing TBB in GTKmm is a good >first step? It might be interesting to incorporate TBB with libsigc++, so that signals can be processed in parallel. Actually, that was what I was thinking about doing when I happened upon Inkscape. >It seems to be one of the trickiest parts, in that we would like to have >the GTK+ GUI responsive while processing is occurring as it would >probably be the biggest perceived gain for users -- but is likely the >most complex part. I think this ties directly into the issues the guys >and Grinnel are seeing. Yeah, I think that eventually I'm going to run into similar issues. For right now, however, I'm just reading the tree (during the idle timer event), so I don't have to worry about updates. As for the future, I think I can have aborted redraws working today or tomorrow (so that the system isn't *less* responsive). Maybe I can get it to the point that we can scroll and redraw at the same time before Friday. Anything fancier, however, is going to require a bunch of careful refactoring... Dennis Lin

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Multithreading (with TBB)
by Dennis J Lin 14 Aug '07

14 Aug '07

Salutations! My name is Dennis Lin, and (until Friday) I'm an intern at Intel. As you may have heard, Intel has released a GPL version of Thread Building Blocks (http://osstbb.intel.com/). In an attempt to gain greater adoption, they have asked me to look into using it to thread existing open-source applications. I've played with the Inkscape source for the last couple of weeks, and I should have some patches soon. I'll try to put out a patch later today to avoid redrawing the entire screen when scrolling diagonally. (This should be independent of scrolling). Where do you prefer your patches? I also have some questions as to how I should proceed. I have found (the hard way) that nr-arena-shape is very *not* threadsafe. However, the Cairo version seems to be a lot better. Is the intent to move everything to Cario in the near future? (I probably don't have enough time remaining to do the conversion, but I might be able to get started, and I can continue on my "free time" after school starts again.) More generally, I have noticed that the sp-canvas and nr-arena-item seem to be scheduled for a rewrite. I have been trying to keep my changes relatively unintrusive, but I was wondering what direction I should be trying to nudge things. Finally, I would like to gauge the interest in this work. What are your sentiments on multithreading in general, and in using TBB to do in particular? Thank you for your time, Dennis Lin

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build failure - paramcolor
by jiho 14 Aug '07

14 Aug '07

I am getting this with latest SVN: depbase=`echo extension/paramcolor.o | sed 's|[^/]*$|.deps/&|;s|\.o $||'`;\ g++ -DHAVE_CONFIG_H -I. -I.. -I/opt/local/include/freetype2 -I/opt/ local/include -D_REENTRANT -DORBIT2=1 -I/opt/local/include/gnome- vfs-2.0 -I/opt/local/lib/gnome-vfs-2.0/include -I/opt/local/include/ gconf/2 -I/opt/local/include/orbit-2.0 -I/opt/local/include/glib-2.0 - I/opt/local/lib/glib-2.0/include -I/opt/local/include -DXTHREADS - I/opt/local/include -I/opt/local/include/freetype2 -I/usr/X11R6/ include -DPNG_NO_MMX_CODE -DXTHREADS -I/opt/local/include/gtk-unix- print-2.0 -I/opt/local/include/gtk-2.0 -I/opt/local/include/atk-1.0 - I/opt/local/include/cairo -I/opt/local/lib/gtk-2.0/include -I/opt/ local/include/pango-1.0 -I/opt/local/include/glib-2.0 -I/opt/local/ lib/glib-2.0/include -I/opt/local/include -I/opt/local/include/ freetype2 -I/opt/local/include/libpng12 -I/usr/X11R6/include - DPOTRACE=\"potrace\" -DPNG_NO_MMX_CODE -DXTHREADS -D_REENTRANT -I/opt/ local/include/gdkmm-2.4 -I/opt/local/lib/gdkmm-2.4/include -I/opt/ local/include/glibmm-2.4 -I/opt/local/lib/glibmm-2.4/include -I/opt/ local/include/pangomm-1.4 -I/opt/local/include/gtk-2.0 -I/opt/local/ lib/gtk-2.0/include -I/opt/local/include/cairomm-1.0 -I/opt/local/ include/sigc++-2.0 -I/opt/local/lib/sigc++-2.0/include -I/opt/local/ include/glib-2.0 -I/opt/local/lib/glib-2.0/include -I/opt/local/ include -I/opt/local/include/pango-1.0 -I/opt/local/include/cairo -I/ opt/local/include/freetype2 -I/opt/local/include/libpng12 -I/usr/ X11R6/include -I/opt/local/include/gtkmm-2.4 -I/opt/local/lib/ gtkmm-2.4/include -I/opt/local/include/atkmm-1.6 -I/opt/local/include/ atk-1.0 -I/opt/local/include/libxml2 -I../cxxtest -I/opt/local/ include -Wall -Wformat-security -W -Wpointer-arith -Wcast-align - Wsign-compare -Woverloaded-virtual -Wswitch -D_FORTIFY_SOURCE=2 -Wno- unused-parameter -O3 -Wall -MT extension/paramcolor.o -MD -MP -MF $depbase.Tpo -c -o extension/paramcolor.o extension/paramcolor.cpp &&\ mv -f $depbase.Tpo $depbase.Po extension/paramcolor.h:26: warning: unused parameter ‘doc’ extension/paramcolor.h:26: warning: unused parameter ‘node’ extension/paramcolor.cpp:43: warning: unused parameter ‘doc’ extension/paramcolor.cpp:43: warning: unused parameter ‘node’ >>>>>>>>>>>>>>> extension/paramcolor.cpp: In constructor ‘Inkscape::Extension::ParamColor::ParamColor(const gchar*, const gchar*, const gchar*, Inkscape::Extension::Parameter::_scope_t, Inkscape::Extension::Extension*, Inkscape::XML::Node*)’: extension/paramcolor.cpp:76: error: ‘strndup’ was not declared in this scope extension/paramcolor.cpp: At global scope: >>>>>>>>>>>>>>> extension/paramcolor.cpp:109: warning: unused parameter ‘doc’ extension/paramcolor.cpp:109: warning: unused parameter ‘node’ extension/paramcolor.cpp: In function ‘void Inkscape::Extension::sp_color_param_changed(SPColorSelector*, GObject*)’: extension/paramcolor.cpp:139: warning: unused variable ‘rgba’ make[2]: *** [extension/paramcolor.o] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 JiHO --- http://jo.irisson.free.fr/

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Tweak tool on straight lines: "feature" or "bug"
by jiho 14 Aug '07

14 Aug '07

Hello all (and bulia in particular), I just discovered that the Tweak tool as no effect on straight lines (on the middle of straight lines to be exact, because it can move the end nodes). Even when there are nodes in the middle, passing the tweak tool avec a straight line does not deform it. I would expect this: | | | | | | | to become more or less this: | | \ \ | / / | I after passing the Tweak tool over it. Is it a feature? a bug? Cheers, JiHO --- http://jo.irisson.free.fr/

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ImageMagick on win32
by Bob Jamison 14 Aug '07

14 Aug '07

Hi all, I uploaded another lib bundle. This one has the ImageMagick library. It is statically built to avoid the (IMHO) nasty DLL collection you would otherwise need to bundle with Inkscape. People can tweak build.xml to get it to build now, I guess. http://inkscape.modevia.com/win32libs/gtk210-070814.7z bob

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"Inkscape Drawing Program Brings Joy to Many"
by Bryce Harrington 14 Aug '07

14 Aug '07

Inkscape is a free vector drawing program that brings joy and robust drawing tools to millions of people who could never afford Adobe Illustrator. You can use Inkscape for fun or for thousands of different practical purposes including designing your own business card, CD cover, advertising layout, and countless other tasks. http://blogs.pcworld.com/communityvoices/archives/2007/08/inkscape_drawin.h…

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Fwd: Google Summer of Code Mentor Summit
by Bryce Harrington 13 Aug '07

13 Aug '07

Some GSoC info for mentors not on the GSoC list... ---------- Forwarded message ---------- From: LH (Leslie Hawthorn) <lhospo@...400...> Date: Jul 31, 2007 7:05 PM Subject: Google Summer of Code Mentor Summit To: Google Summer of Code Announce <google-summer-of-code-announce@...820...> ***If you are not a mentor or organization administrator, you can stop reading now.*** Hello everyone, Those organizations who were with us last year may remember that we hosted a mentor summit at Google Mountain View following the conclusion for the program. We got a tremendous amount of positive feedback about the summit, and we're pleased to let you know that we'll be doing it again! Further details will be sent to the mentors list, so please stay tuned there for further information. http://groups.google.com/group/google-summer-of-code-mentors-list Cheers, LH

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INKSCAPE being sold on eBay
by Bryce Harrington 13 Aug '07

13 Aug '07

I don't know if this is legal or what, but am passing the word along if anyone would wish to follow up on it (I have no plans to). Bryce ----- Forwarded message from Keith Almond <ss-kalm@...58...> ----- Date: Fri, 10 Aug 2007 05:41:35 -0700 From: Keith Almond <ss-kalm@...58...> To: bryce@...58... Subject: INKSCAPE Message body follows: There are people selling Inkscape and other SOURCEFORGE items on ebay. Is this legal. Not that I want to do it, more that I would like to see it stopped. Check out: http://search.ebay.ca/search/search.dll? from=R40&_trksid=m37&satitle=inkscape&category0=em I would be interested to know if he/she should be doing this. Keith Almond -- This message has been sent to you, a registered SourceForge.net user, by another site user, through the SourceForge.net site. This message has been delivered to your SourceForge.net mail alias. You may reply to this message using the "Reply" feature of your email client, or using the messaging facility of SourceForge.net at: https://sourceforge.net/sendmessage.php?touser=1674196 ----- End forwarded message -----

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NEW: blur export fixed
by bulia byak 12 Aug '07

12 Aug '07

I fixed several often-reported bugs of 0.45: * Exporting blurred objects to bitmap is now much faster. This was particularly slow in 0.45; some files could take hours to export. Now this is fixed, in part by the faster algorithm (contributed by Jasper soon after the 0.45 release) and in part by today's bugfix in the export code. Now even the quite complex files with large blurs export at high resolution in at most a few minutes. * The disappearing of blurred objects in exported bitmaps which happened for large objects in 0.45 is fixed. * The same fix got rid of the rendering artefacts that sometimes appeared on blurred objects during scrolling. While the fix is simple, it's in a sensitive area, so please test rendering and exporting your files with blur and report any problems to me at once! -- bulia byak Inkscape. Draw Freely. http://www.inkscape.org

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Window title not consistent
by Olaf Telshörner 11 Aug '07

11 Aug '07

When you open a document, the window title shows the filename exclusively, e.g. 'foo.svg' When you save a document, the window title shows the full path of the file, e.g. '/bar/foo.svg' I find this behaviour rather confusing and would suggest a more consistent window title. --------------------------------- Jetzt Mails schnell in einem Vorschaufenster überfliegen. Dies und viel mehr bietet das neue Yahoo! Mail.

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Re: [Inkscape-devel] rev 15630 linking error
by joel＠...1709... 11 Aug '07

11 Aug '07

Hey thanks for sorting that out bulia. About the enable preview text box: I'm not sure that I'm the best person to sort that out right now. You see right now I'm not really focussing on the GTK file dialogs. For Windows users I'm replacing them with Win32 native equivalents. My explorer thumbnail extension is making steady progress as well. I was really worred that the lack of ATL/WTL in MingW would be a big stumbling block. It turned out to be no problem in the end. The two problems I'm having are the slowness of compiling in Windows compared to Linux, as well as the problem of still (as far as I know) not being able to compile with btool in Vista - I have to work through VNC on a broken screened XP laptop lying under my desk! Other than these two problems all is well. Joel ---------------------------------------- From: "bulia byak" <buliabyak@...400...> Sent: 10 August 2007 01:25 To: joel@...1709... Subject: Re: [Inkscape-devel] rev 15630 linking error Joel, thanks for updating the relnotes, but I edited your addition: mentioned it's on windows, started by explaining the user-visible result (windows no longer sink) instead of the technical details about parent windows etc. I also added a note on "Enable preview" which is also a new feature. By the way, is it possible to move that checkbox closer to the preview itself? -- bulia byak Inkscape. Draw Freely. http://www.inkscape.org

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Inkscape performance
by Joshua A. Andler 11 Aug '07

11 Aug '07

Hey all, So, with the last couple files I've worked on (my last hitting 23.5megs... note that I abuse clones ;)), Inkscape's performance seems to have tanked. Is this due to the nature of a "bloated" (not really bloated, but I used the term because it's human readable) format or a parsing issue or something else? I'm just curious if there's anything that could possibly be done to improve the performance. I know that I had files this complex in AI, and it could hang when the files got huge and I copied/pasted objects around. But it's even painful with stuff like pulling up the fill & stroke dialog for the first time in a session with one of these complex docs. It will take like 3-5 mins to unfreeze and show the dialog. Just figured I would ask. -Josh

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Compile error in line-geometry.cpp with struct assignment for gcc 3.3
by John Faith 10 Aug '07

10 Aug '07

Hello, When I try to build svn 15634 using gcc 3.3 (OS X 10.3), I get a compile error: line-geometry.cpp: In member function `virtual NR::Maybe<NR::Point> Box3D::Line::intersect(const Box3D::Line&)': line-geometry.cpp:57: error: parse error before `;' token I was able to build 0.45.1 in this same environment, so this error is relatively new. The error seems to be caused when something is set to NR::Nothing. This example causes the same error: namespace NR { struct Nothing {}; }; void function() { void* junk = NR::Nothing; //<---- parse error } I played with this a bit, and found that the problem is not related to the namespace nor to the fact that the struct has no members. Does this sound familiar to anyone, or can anyone recommend a way (search terms) to find out more about this? Thanks!, John

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Python scripting question
by Kent Tenney 09 Aug '07

09 Aug '07

Howdy, Can a Python extension script provide the following; - browse for and select a file - the text in the file becomes a text object in my drawing Thanks, Kent

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Mingw-gcc 4.2.1
by Bob Jamison 09 Aug '07

09 Aug '07

Hi, everyone, I just noticed that Danny Smith uploaded test versions of gcc-4.2.1 built for Mingw32. These are a bit more "official" than the builds that I uploaded, so anyone having trouble currently (like relocatability) might want to try these. https://sourceforge.net/project/showfiles.php?group_id=2435 Look for "GCC Version 4," and we are currently using the "setjump/longjump" exception model (sjlj), so you would want these: http://downloads.sourceforge.net/mingw/gcc-core-4.2.1-sjlj-1.tar.gz2 http://downloads.sourceforge.net/mingw/gcc-g%2B%2B-4.2.1-sjlj-1.tar.gz2 Hopefully Danny will soon let the Dwarf (dw) model be the default, but all of our libraries are built with sjlj, so if you use dw now, it won't link. bob

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