July 2008 - Inkscape Devel - Inkscape Mailman

Re: [Inkscape-devel] Adding additional raster effects...
by Ted Gould 29 Jul '08

29 Jul '08

On Sat, 2008-07-26 at 08:52 -0400, heathenx wrote: > Ok. I think I have my new ImageMagick effect written by saving out a copy of a present effect, and > modifying the code. Immediately I'm not sure where to add the extra menu item though. I scanned > various menu*.cpp related files but I am not discovering which file is the storing the > Effects/Raster menu picks. Any clues? Actually, you don't need to add the menu item at all, if it's defined in the INX file it'll get added automatically. In the case of C plugins, the INX file is the XML that is at the bottom of the file. Probably the reason that you're not seeing it is that your plugin isn't getting initialized. To do that you'll have to put it in the list of plugin inits. Look at: /src/extension/init.cpp http://inkscape.svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/exte… > Also, it's my understanding that in order to see if my new effect works I have to compile. Not a > problem. But say I make a stupid typo like I do often...are there any shortcuts so that I don't have > to recompile the whole thing again every time I want to fine tune the code? In general, you'll only have rebuild when a major header file or the build system is changed. So if you change one of the Makefiles (probably when you added your file) it'll change. But when you change init.cpp it'll only build init.o, libextension.a and the inkscape binary. --Ted

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Node tool is broken in Inkscape 0.46+devel, built Jul 16 2008 (on Windows)
by worms invasion 29 Jul '08

29 Jul '08

Hello, In Inkscape 0.46+devel, built Jul 16 2008, on Windows 2000, the Node tool is broken: You can't select the type of node at all if no handles are shown on the node. (i.e. select a newly drawn node and apply a type to it). When handles have been dragged out of the node, then you can select the node type in the toolbar. This is a change of behaviour from before. Regards

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Crop & Transparency Tools
by Andy Fitzsimon 29 Jul '08

29 Jul '08

Hi everyone, I've got a couple of thoughts I'd like some feedback on. Clippaths and Masking are both existing functions we support but Cropping and a transparency tool are features that dont currently exist. There is a process that must be done to achieve those results which I think is redundant work 90% of the time, not to mention hard to learn for new users. So here's my proposal. [[ CROP TOOL ]] Is anyone interested in defining the interaction and rendering of a cropping function? My assumption would be a tool that helps the user create a <rect> (that is rendered as a inverted filled outline. The tool would instantly draw the rect > selects objects according to the setting > groups that selection (if crop selection is specified) and finally applies a clippath. We would need display tricks mentioned like rendering a 50% transparent black fill for the area not being cropped during the process. Rotating the crop could be done with the control point usually reserved for rounding a rect ( as I dont think we want to introduce rounded clippaths when we are talking about something simple like cropping. also I think this should be have three modal settings in the toolbar: - crop entire document, - crop selected objects (which would require grouping before applying the clippath) - crop current layer ( which would clippath the layer group) [[ TRANSPARENCY TOOL ]] We could use a similar approach to create a transparency tool. In one action we would create a white rect matching the bounding box of the selected object(s) and group + mask to uniformly reveal transparency features similar to xara anyway what do you think? Andy

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Overloading ambiguity
by Federico Beffa 29 Jul '08

29 Jul '08

Dear Inkscape developers, I'm trying to compile Inkscape-0.46 on OpenSolaris-200805 with the SunStudio tools. Unfortunately the process is not very smooth. After fixing some errors reported by the compiler, I'm stuck with the following one: "document-subset.cpp", line 234: Error: Overloading ambiguity between "Inkscape::Util::ForwardPointerIterator<SPObject, SPObject::ParentIteratorStrategy>::operator SPObject*() const" and "Inkscape::Util::ForwardPointerIterator<const SPObject, SPObject::ParentIteratorStrategy>::operator const SPObject*() const". 1 Error(s) detected. make[2]: *** [document-subset.o] Error 1 make[2]: Leaving directory `/usr/pack/inkscape-0.46-fb/src/inkscape-0.46/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/usr/pack/inkscape-0.46-fb/src/inkscape-0.46' make: *** [all] Error 2 Unfortunately I'm not a C++ expert, nor familiar with the Inkscape code. I would be very grateful if someone could give me a hint on how I could fix this compiler time ambiguity. Hereafter I report the code which generates the error. void DocumentSubset::Relations::addOne(SPObject *obj) { g_return_if_fail( obj != NULL ); g_return_if_fail( get(obj) == NULL ); Record &record=_doAdd(obj); /* find the nearest ancestor in the subset */ Record *parent_record=NULL; for ( SPObject::ParentIterator parent_iter=obj->parent ; !parent_record && parent_iter ; ++parent_iter ) ... The actual error is generated at the logical AND (&&) operator in the for looping condition (last line). Thank you for your help. Fede

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NEW: LPE Interpolate
by unknown＠example.com 28 Jul '08

28 Jul '08

Hi all, I just committed a new LPE: Interpolate. Does something like the python interpolate effect. You can also draw the interpolation trajectory: the path along which the intermediate paths are drawn. 1. Draw a path consisting of 2 subpaths. (draw a line, then draw another line while holding shift. the 2nd line will be added to the 1st, the result will be an SVG path with 2 subpaths) 2. Apply LPE Interpolate. The reason I made this interpolation between the 1st and 2nd subpath is that it seemed relatively easy to do this, instead of interpolating between whole sets of paths. Hmm, now that I think of it, it isn't all that much more effort actually. In any case, the UI is much easier to work with for subpaths than for 2 paths. I could also do this probably: 1. Draw an interpolation trajectory 2. Apply LPE 3. Copy-paste first path as "Path A" parameter Copy-paste second path as "Path B" parameter Let me know what you all think is best, maybe we want both, as in the case of bend path and pattern-along-path. ("Interpolate subpaths" and "Interpolate along path") :) Johan P.S. The LPE choose dropdown box is getting really huge now. Who wants to make mockups of what is a better system for applying effects?

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Gdadin: an Inkscape Effect to draw algorithms
by Alpt 28 Jul '08

28 Jul '08

Dear Inkscape developers, I'm pleased to announce the first release of Gdadin. --- Gdadin http://freaknet.org/alpt/src/gdadin GUI to Draw Algorithms Designed with Inkscape Gdadin is an Inkscape effect. It creates complex drawings from simple rules The rules are defined with an intuitive GUI based on the Copy&Paste principle. The Gdadin concept and its main design have been heavily inspired by Cfdg ( http://www.contextfreeart.org/ ), a programming language used to compose and create drawings. Almost all drawings created with Cfdg can be reproduced with Gdadin. Examples: http://freaknet.org/alpt/src/gdadin/examples/ Main documentation: http://freaknet.org/alpt/src/gdadin/README Video lessons: http://freaknet.org/alpt/src/gdadin/lessons/ --- I would be very pleased to hear your feedback. Is there a possibility to include Gdadin in the official Inkscape release? Note: Since I will be very busy, I don't plan to update the code soon, therefore feel free to improve it. Best regards. -- :wq! "I don't know nothing" The One Who reached the Thinking Matter '.' [ Alpt --- Freaknet Medialab ] [ GPG Key ID 441CF0EE ] [ Key fingerprint = 8B02 26E8 831A 7BB9 81A9 5277 BFF8 037E 441C F0EE ]

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Fix for latency warnings
by Jon A. Cruz 26 Jul '08

26 Jul '08

For those seeing the recent event latency warnings, I've just put in a fix ** (inkscape:27965): WARNING **: Event latency reached 3.290566 sec The main cause of extraneous warnings is a slight difference between the clock used for the GDK event marking and the real time. On my Mac, I observed that the skew was of a constant factor, so I added in an option to compensate for that. On my system the value was 0.9766 (and thus on my system after running for 85 seconds Inkscape would believe a latency of over 2 seconds had crept in). We'll probably need to investigate this a bit more, but getting that factor in should let people with false warnings get things calibrated and see only good ones. If you need it, look for the new setting under the misc pane.

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a newbie installation question
by Tena Sakai 25 Jul '08

25 Jul '08

Hi, I have downloaded .gz file, gunzipped, and tried installing by: ./configure (and so forth) The configure complained as to: > checking libgc version 6.4+... no > configure: error: libgc (the Boehm Conservative Collector) 6.4+, is needed to compile inkscape -- http://www.hpl.hp.com/personal/Hans_Boehm/gc So I went ahead and installed gc. It seemed to have gone well. Here's the tail end of what 'make install' told me: > Libraries have been installed in: > /usr/local/lib > If you ever happen to want to link against installed libraries > in a given directory, LIBDIR, you must either use libtool, and > specify the full pathname of the library, or use the `-LLIBDIR' > flag during linking and do at least one of the following: > - add LIBDIR to the `LD_LIBRARY_PATH' environment variable > during execution > - add LIBDIR to the `LD_RUN_PATH' environment variable > during linking > - use the `-Wl,--rpath -Wl,LIBDIR' linker flag > - have your system administrator add LIBDIR to `/etc/ld.so.conf' > See any operating system documentation about shared libraries for > more information, such as the ld(1) and ld.so(8) manual pages. > ---------------------------------------------------------------------- > test -z "/usr/local/include" || mkdir -p -- "/usr/local/include" > /usr/bin/install -c -m 644 'include/gc.h' '/usr/local/include/gc.h' > /usr/bin/install -c -m 644 'include/gc_local_alloc.h' '/usr/local/include/gc_local_alloc.h' > /usr/bin/install -c -m 644 'include/gc_pthread_redirects.h' '/usr/local/include/gc_pthread_redirects.h' > /usr/bin/install -c -m 644 'include/gc_config_macros.h' '/usr/local/include/gc_config_macros.h' > /usr/bin/install -c -m 644 'include/leak_detector.h' '/usr/local/include/leak_detector.h' > /usr/bin/install -c -m 644 'include/gc_typed.h' '/usr/local/include/gc_typed.h' > make[2]: Leaving directory `/usr/local/src/gc/gc6.7' > make[1]: Leaving directory `/usr/local/src/gc/gc6.7' So, I went back to inkscape's configure and tried the same thing as before. It is telling me the same thing as before: > checking libgc version 6.4+... no > configure: error: libgc (the Boehm Conservative Collector) 6.4+, is needed to compile inkscape -- http://www.hpl.hp.com/personal/Hans_Boehm/gc I looked at the configure script, but it is a bit too intimidating. I would appreciate a tip as to what I have to do to alleviate the problem and successfully finish the installation. Thank you. Tena Sakai tsakai@...2019...

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Adding additional raster effects...
by heathenx 25 Jul '08

25 Jul '08

I am interested in adding a couple more effects the the already existing raster effects. It's more or less just for myself since I don't have the chops to contribute anything of value to anyone else. I'm not sure what I'm biting off at this point. It might be easy or it might be extremely hard to do. My coding skills are very limited (meaning I have none). Are the raster effects part of the main source code or are they broken out into smaller "extensionized" chunks somewhere? I think modifying an existing effect into something else might be a good starting point for me...if possible. A "Dude, don't even attempt to try this." would be a perfectly acceptable answer for me. I'll walk away like nothing ever happened. :) heathenx

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whats happened to blend modes
by Andy Fitzsimon 24 Jul '08

24 Jul '08

its been a while since we had it working in svn... who broke them and why ?

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