- Inkscape Devel - Inkscape Mailman

Re: [Inkscape-devel] InkScape Help !!
by Ted Gould 30 May '12

30 May '12

Hey Suresh, I'm going to go ahead and CC inkscape-devel on my reply. That list, in general, is more likely to get you a timely e-mail than sending it directly to me. Plus it helps everyone learn together. I hope that's okay. On Thu, 2012-05-10 at 03:14 -0700, $uresh... wrote: > Ted, I am using InkScape for vector drawing, mostly I will generated > Vector graphics, generate svg file, and parse the file using C++ > coding and load the final value to CNC machine. By default, when there > is a group of object, by default matrix apply to only group not a > single object, so in some complex drawing with group, group and sub > group to find the object property I have to move to the parent group > and apply the value to group, well this is time taking and in some big > vector image, my binary hand and crash, because i traverse the svg, > find the root parent and apply parent property to child object.. > > For ex. > > Parent -> Child 1 (transform) -> child, in this case i need to > traverse upto the child parent that is Child 1 and if there is any > transform, I will strore it and apply it. > > Now I want to find out how can reduce the whole method using some > simple logic? Is there any way to simplified this process, so that i > will have exact object property of that group. In general, this is the way that SVG is structured, so that is how Inkscape represents it as well. What you're basically asking for is the rendered version that flattens the stack. I'm not sure exactly what you need as the final output, but if you could get it from the renderer directly that might be a solution for you. I'm not that familiar with the renderer code as it's been updated heavily recently, but if you think it might be, reply to the list with your questions. If not, I'd recommend not going up the stack, but in fact down it and keeping the matrix transformations themselves in a stack. So then you effectively have a cache of last few matrices as you move down. Computing the entire stack for each object is much more costly. Good luck! Ted

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Embedded inline graphics and SVG ?
by Ivan Louette 30 May '12

30 May '12

I pick this up from the announcement of Xara Designer 8. This is a great feature but I don't know if this is compatible with svg. Freehand had it already a long time ago, and DTP programs like QuarkXPress also (but the later can also embed bitmap images on text lines, which is a must !) " Designer MX now allows you to embed 'inline graphics' in text using a simple Paste operation. Embedded graphics are great for really small items on the line such as symbols, icons etc, and are treated just like a 'character', in other words they flow and follow the same formatting rules as a character embedded in the text. " ivan

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libpoppler shenanigans
by Chris Mohler 29 May '12

29 May '12

Hi, I had some issues when compiling current bzr against current libpoppler. I've attached a patch of modifications I made - I wouldn't apply it though: First item is that it seems like #define POPPLER_NEW_COLOR_SPACE_API isn't getting set in the configure script, and I don't have enough autotools-fu to figure out why. The test around line 20770 looks OK to me. So I crammed a define POPPLER_NEW_COLOR_SPACE_API 1 into pdf-parser.cpp (which is obviously the absolutely wrong thing to do). The next 57 changes are also in pdf-parser.cpp. It seems poppler's error() function now takes an additional first argument of type ErrorCategory [1]. I changed all error types to 'errInternal', since I'm guessing these aren't getting reported anywhere anyway. The final hack is that GfxFont no longer has a function 'getOrigName()'. It seems 'getName()' takes care of this now [2], so I removed that call from svg-builder.cpp. So, I doubt the patch is of any real value unless you're wanting to play around with current poppler on linux. On the upside, PDF import works just like in 0.48 with poppler shipped by Mint 12/Ubuntu Oneiric (0.16?). Of course the shipped -dev package doesn't have the xpdf headers, hence my willingness to muck about with poppler from git ;) Chris [1] http://cgit.freedesktop.org/poppler/poppler/tree/poppler/Error.h#n54 [2] http://cgit.freedesktop.org/poppler/poppler/tree/poppler/GfxFont.h#n199

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Mesh tool added to trunk
by Tavmjong Bah 23 May '12

23 May '12

Hi, My Mesh branch suffered from serious bit rot. This is good as it shows how fast Inkscape code is progressing. But it also required several days of work to get the mesh branch in sync... not so good. I have thus merged the branch with trunk so I won't have to go through this pain again. One major change I made was to create a separate Mesh tool. The editing mode for meshes is significantly different from that for linear and radial gradients that I think this makes the most sense. By default, the Mesh tool is not shown. You can enable it at compile time by editing the file widgets/toolbox.cpp to define WITH_MESH. To actually see meshes, you must have compiled and linked to a version of Cairo greater to or equal to 1.11.4. Cairo version 12.0 would be preferred as 1.11.4 has bugs that cause frequent Inkscape crashes. Note, meshes are to be considered experimental. The SVG working group has endorsed their inclusion in SVG2 but the exact syntax has not been fixed. Inkscape is the only program/browser/renderer that supports the proposed SVG mesh syntax. Also, the UI for meshes is rather primitive at the moment. Please play with the meshes and give your feedback. Bug fixes and interface improvements will be greatly appreciated! Tav

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Re: [Inkscape-devel] Mesh tool added to trunk
by Valerie 23 May '12

23 May '12

> What would be your recommendation regarding PPA builds? Enable or > disable the feature? Please enable it! Those of us using the PPA already know that it's an unstable build, and many of us look forward to testing this feature! :D

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Re: [Inkscape-devel] Powerstroke presentation at LGM 2012
by jbc.engelen＠swissonline.ch 21 May '12

21 May '12

What I meant is: how do other programs draw sharp joins on thick paths? Ugly with a standard miter, or perhaps nicer? -Johan ----- Reply message ----- Van: "Valerie" <valerie_vk@...36...> Datum: ma, mei 21, 2012 10:56 Onderwerp: [Inkscape-devel] Powerstroke presentation at LGM 2012 Aan: "inkscape-devel(a)lists.sourceforge.net" <inkscape-devel(a)lists.sourceforge.net> > So... how do other programs draw thick stroked lines? Well, Synfig also has thick line drawing: http://wiki.synfig.org/wiki/Outline_Layer Illustrator 5 also has a line thickness feature: http://www.video2brain.com/en/lessons/variable-width-strokes I'm not sure about the algorithms they use though. By the way, more feedback on Powerstrokes: - Closed-paths powerstrokes will often render strangely until you fiddle a bit with them. - Is it possible to either: a. Save the relative positions of the widths controls (to save the shape of the powerstroke) or b. Define the starting distance between the control point and the line center at least (basically when drawing very thin powerstrokes, the starting thickness can be a bit distracting)? I'm trying to come up with a mock-up for line style management, to easily save and access all sorts of presets collections: - Powerstrokes - Pattern along Path (I'm finishing a mock-up proposal for on-canvas Pattern along Path editing) - Graph lines (a few arrowed and dotted lines. They're such a pain to set and unset right now) - Calligraphy (save presets as now, but with visual previews!) - [insert custom collections. Maybe presets from other tools] They'll be accessed just like brush presets in MyPaint and Krita from a dialogue, except with longer previews. For Powerstrokes, presets would allow the user to access various settings easily. But I'm hoping that it would also be possible to save and access preset Powerstrokes shapes, or at least of varying widths. For example, suppose you're drawing eyelashes or hair highlights. You don't need to control the exact width of every line, but they do all need to be thin. See? ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Inkscape-devel mailing list Inkscape-devel(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/inkscape-devel

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Re: [Inkscape-devel] Powerstroke presentation at LGM 2012
by Valerie 21 May '12

21 May '12

> So... how do other programs draw thick stroked lines? Well, Synfig also has thick line drawing: http://wiki.synfig.org/wiki/Outline_Layer Illustrator 5 also has a line thickness feature: http://www.video2brain.com/en/lessons/variable-width-strokes I'm not sure about the algorithms they use though. By the way, more feedback on Powerstrokes: - Closed-paths powerstrokes will often render strangely until you fiddle a bit with them. - Is it possible to either: a. Save the relative positions of the widths controls (to save the shape of the powerstroke) or b. Define the starting distance between the control point and the line center at least (basically when drawing very thin powerstrokes, the starting thickness can be a bit distracting)? I'm trying to come up with a mock-up for line style management, to easily save and access all sorts of presets collections: - Powerstrokes - Pattern along Path (I'm finishing a mock-up proposal for on-canvas Pattern along Path editing) - Graph lines (a few arrowed and dotted lines. They're such a pain to set and unset right now) - Calligraphy (save presets as now, but with visual previews!) - [insert custom collections. Maybe presets from other tools] They'll be accessed just like brush presets in MyPaint and Krita from a dialogue, except with longer previews. For Powerstrokes, presets would allow the user to access various settings easily. But I'm hoping that it would also be possible to save and access preset Powerstrokes shapes, or at least of varying widths. For example, suppose you're drawing eyelashes or hair highlights. You don't need to control the exact width of every line, but they do all need to be thin. See?

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Re: [Inkscape-devel] Recursive Drawing
by Valerie 21 May '12

21 May '12

> Yes, there are always things that will take "too much" time, but > initially it's usually a good idea to think about what you'd really > want. If you start thinking too early about performance you often end up > with something that might(!) be fast, but isn't really what you want... > So ideally you start to think about what you want, then identify where > the performance problems might lie and try to fix that. That's true. In any case, I'll explore the UI concept of on-canvas templates some more, and see where it leads. > Have a look at laidout (http://laidout.org/). Of course! :)

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SVG Path contains vertical bar |
by Ogla Sungutay 20 May '12

20 May '12

Hi guys, The path d attribute in Inkscape often contains a | character followed by one or two point coordinates. Does anyone know what this is used for? -- V. Ogla Sungutay, GUI Programmer www.lyciasoft.com *gtalk:* ogla@...2470... *g+:* g <http://plus.google.com/110038181712863996630>plus.to/Proclus *skype:* oglasungutay *twitter: *@proclus

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Re: [Inkscape-devel] Recursive Drawing
by Valerie 18 May '12

18 May '12

> Don't let that worry you too much :) First of all, rendering a bunch of > shapes isn't necessarily that slow, and secondly, there are usually some > tricks to make the speed acceptable when it is. True, though I wonder if you'll still be saying that once people start stacking symmetry templates on top of tiling templates on top of perspective templates, with extrude templates in-between. What am I talking about? - A person draws half a window, then uses a symmetry template to make the other half. - Then drops that group onto a tiling template to make a whole bunch of windows. - Then drops That group onto a perspective template to make a wall full of windows. - And somewhere in-between, uses an extrude template to extrude windows, balconies etc. - He also drops an L-system templates to create vine-looking objects on-canvas. Then drops that onto the perspective template as well (vines along the wall). - On another side, he drops a whole picture (a poster) onto a deform template (for slightly wavy paper), and drops that onto another perspective template. (this is just an example, in case you're asking why the user isn't learning how to use a 3D program instead) All the while, every function in-between can still be edited: he can change the number of windows on-canvas (tiling), can change the perspective on-canvas, can change the extrude values on-canvas, can edit the vines on-canvas too. He can turn templates on and off, for example turning off the perspective template temporarily to edit the poster. There's been a lot of head-scratching regarding the proper interface for LPE-stacking. The current interface is not on-canvas enough, and the lack of reusability is a pity (for perspective, for example, or custom wavy flags). There's been another proposal for connecting function boxes, and I'm not sure users would like that either. On-canvas templates may be a new approach, but seems to open up a lot of possibilities. Are there any other programs where you drop all sorts of functions to be accessed on-canvas? (previously I was also thinking about adding functions to guides for various effects, but now I think some of those could be snap modes: snap to parallel i.e. straight lines snap into directions parallel to guides-, snap to orthogonal, snap towards guide points) > (Frankly, it's more the "sounds stupid, but involves a whole lot > of code refactoring" tasks that usually don't get done.) Yeah... there are a few fundamental operations that Inkscape can't do yet, like a number of group operations: - You can't perform boolean operations like substract or cut on a group - You can't cycle through color hue for a group (like you do with hue/saturation in Gimp) - You can't perform perspective deform on a group, nevermind make perspective templates... I'm also trying to think for a proper GUI proposal for on-canvas Pattern Along Path editing combined with line shape presets management (the presets could probably be accessed from a separate dialogue, like brush presets in MyPaint and Krita). This means Inkscape could ship with custom line shapes like chains, zippers etc., and then the user would be able to modify their size etc. without accessing a scary LPE dialogue. Presets won't just apply to Pattern Along Path, users can save their own powerstroke settings and dotted lines + markers settings for quick access. I don't suppose someone could bring this layer clip extension into the main branch, by the way? Layer masks (or just clipping) happens to be quite high on many people's wishlist: http://www.pernsteiner.org/inkscape/layerclip/ I really got off-topic. Oops?

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