April 2005 - Inkscape Devel - Inkscape Mailman

command line png export and hidden layers in .40?
by Lee Braiden 18 Apr '05

18 Apr '05

That last release of SVGSlice was pretty poor, I'm afraid. Mixed up the versions of files I had, and since Inkscape is currently crashing on my ppc machine, I hadn't noticed. Anyway, I think it's all fixed, but in the process of testing for a new release, I've noticed that Inkscape 0.40 on my x86 box seems to export the hidden slice layer along with everything else. Is 0.41 the first version to support ignoring hidden layers on command line PNG export, or do I need to start bug hunting this one? I checked the .41 changelog, but maybe that new feature was too small to get a mention? -- Lee Braiden http://www.DigitalUnleashed.com

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Cleaned-up inkscape windows icon
by Bob Jamison 18 Apr '05

18 Apr '05

Hi, all. I got weary of looking at that amateurish 32x32, 16 color icon that I made last year, which overlaps the boundaries and has a white (not transparent) background. I tried several times, and got a better-looking icon, inkscape32-16.ico. Here is a comparison of the new and old icons: http://troi.hous.es3.titan.com/inkscape/files/icon-screenshot.png I made a build with it: http://troi.hous.es3.titan.com/inkscape/builds/Inkscape0504171202.zip Not being an artist, I just fixed the size, background, and contrast. If someone has an icon editor (I used Borland's) and would like to work on it, please give it a try. Using an icon editor, and not a regular image editor, is important, since it will impose the restrictions that a .ico file should have. Bob

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Crash with SVG file as argument
by Jean-Francois Lemaire 18 Apr '05

18 Apr '05

Hello, Whenever I try to launch Inkscape with an SVG file as argument it crashes and I get the message "emergency save activated" With any other type of file it doesn't crash. Does anyone notice the same behaviour? I'm running Inkscape CVS compiled with --with-gnome-vfs under SuSE Linux 9.2 if that makes any difference. Jef

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Re: [Inkscape-devel] "COMPUTERBILD"?
by Bryce Harrington 18 Apr '05

18 Apr '05

On Fri, Apr 15, 2005 at 09:19:46AM +0200, Thorsten Wilms wrote: > On Thu, Apr 14, 2005 at 05:56:48PM -0700, Bryce Harrington wrote: > > > > I've been emailed by someone from a magazine called "ComputerBild", that > > is said to be popular in Europe. Could someone confirm for me that it > > exists? > > Yes. It's a spinoff of Bild, a german newspaper with huge headlines and > full of gossip. > It's very well known and targeted at those who don't know better ;-) Ah, thanks. Strange, so sort of a PC World type publication. From the website it looks very Windows focused. Odd that they'd want to include Inkscape, but probably a good thing. Guess we can use this as an opportunity to do some GPL education. I'll work up a response for this over the weekend. Are there any fluent German speakers that would like to help me in doing a translation of what I write to include? Bryce

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Re: [Inkscape-user] Exporting as PS
by bulia byak 17 Apr '05

17 Apr '05

On 4/12/05, Michael Forbes <miforbes@...734...> wrote: > > Sorry I took a while to respond, I was out of town. I downloaded the file and > fetched the latest CVS and I don't seem to have any problem aside from the Camel > which is explainable because of transparency. Is there something I missed? Sorry I wasn't quite clear. Here's a sample SVG with a rect and a text, both having the same gradient, and the EPS exported from it (without converting text to curves). In EPS, the text object has the same gradient fill code as the rect, yet rect shows the gradient but the text is black. So my question is, what's wrong with our PS in that case, and can it be made to work at all?

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slicing/export
by Alexandre Prokoudine 17 Apr '05

17 Apr '05

Hi, You might like to take a look at crossplatform image editor Pixel32 (Windows, Linux, etc). It has very interesting tools for slicing. http://pixel32.box.sk/ Alexandre

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Project status - April 15
by Bryce Harrington 16 Apr '05

16 Apr '05

Project Status - Friday, Apr 15, 2005 ------------------------------------- Well, another month with no SourceForge statistics, but the other stats we collect show steady growth for the project. Interesting to see that our linecount has been reduced a few thousand lines over the past month. Mental has been doing a bunch of code cleanup, so I would guess this has caused some linecount reduction. Several folks from the Open Clip Art Library have started a 'Planet' site for aggregating RSS feeds from developers in various graphics projects. http://openclipart.org/planet/ We're still in deep development mode. In addition to Mental's major cleanup work, Bulia has been continuously adding cool new features, Bryce is working on hooking up a Gtkmmified canvas, Jon Cruz is inventing new Panel and Palette metaphors, Cyreve is busily revising the text layout system, Peter has been fixing bugs and adding helper ffunctions, Jean Lemaire has made some improvements to the layer commands, Jon Philip has been helping with gtkmm on the Dialog Manager code, and probably more that wasn't listed in ChangeLog. There's been a rise in scripting interest lately, and I understand work is underway in writing an Inkscape manual. Hopefully we'll see more of such side activities in the coming months. :-) Statistics Feb 15 Mar 15 Apr 15 ========== ====== ====== ====== Lifetime Rank on SourceForge: * * * * * * Max Week's Rank on SourceForge: * * * * * * Total SF Page Views * * * Total SF Downloads * * * Total Freshmeat URL Hits 16,448 17,186 17,930 Total Freshmeat Subscriptions 169 173 177 Lines of Code in src/: 333,139 342,852 340,515 Code lines 234,651 241,177 238,522 Comment line 58,239 60,354 60,382 Blank 46,859 47,978 48,152 Lines of Docs in doc/: 26,848 26,848 26,848 Lines of content in website: 9,776 10,067 35,937 Size of the Inkscape wiki: 24,925 25,900 26,363 Bugs open/total: 155/972 182/1047 194/1126 Features open/total: 370/579 397/ 619 429/ 671 Patches open/total: 5/167 7/ 173 5/ 186 CVS Commits (as per inkscape-cvs) 10,312 10,868 11,368 Inkscape-devel membership: 151 158 166 Inkscape-announce membership: 169 177 189 Inkscape-user membership: 193 220 234 Num Translations: 33 33 33 Ave Translation Ratio: 47.8 45.0 47.5 * - Statistics unavailable

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Re: Firefox 1.1 SVG support
by John Taber 16 Apr '05

16 Apr '05

Well, I have my article half-written on using Inkscape for web page graphics but someone beat me to it on the state of browser support: http://svg.org - it's a pretty good read. But the even bigger news is the announcement above it that Firefox 1.1 will have SVG turned on. Great News !

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[bryce@...260...: Re: Inkscape on our covermount CD]
by Bryce Harrington 15 Apr '05

15 Apr '05

FYI ----- Forwarded message from Bryce Harrington <bryce@...260...> ----- Date: Fri, 15 Apr 2005 14:57:00 -0700 From: Bryce Harrington <bryce@...260...> To: Konstantin Breyer <kbreyer@...787...> Subject: Re: Inkscape on our covermount CD Mr. Breyer, Thank you for contacting us. Yes, Inkscape is available under terms such as these, and I will review the license this weekend and fax a signed confirmation of the terms to you by Monday. Thanks, Bryce On Thu, Apr 14, 2005 at 06:44:41PM +0200, Konstantin Breyer wrote: > D ear Sir or Madam, > > > > your Software Inkscape on our covermount CD: COMPUTERBILD, Europe's biggest > PC magazine, is going to attach a CD/DVD-ROM to one of its next issues. We > would like to record your software free of charge on this CD/DVD-ROM. The > software versions on the CD/DVD-ROM will be explained in the magazine and > will possibly also be presented and explained on our internet page > "www.computerbild.de". Thus, your product will be presented to more than 4 > millions of readers (MA 2004 I) and many enthusiastic users of the internet > - for that reason your software will get a high amount of attention. > > > > Join in. For the sake of good order, please fax the signed license agreement > (please delete inapplicable terms) back to us (+49/40/34 724 710) and e-mail > me the system requirement sheet. > > > > Kind regards, > > > > Mit freundlichen Gr??en > > Konstantin Breyer > Axel Springer AG > Redaktion COMPUTERBILD > Leitender Redakteur Software > > Telefon +49 (0) 40 - 34 72 34 52 > Mobil +49 (0) 151 - 12 70 88 23 > > Telefax +49 (0) 40 - 34 72 47 10 > E-Mail kbr@...787... <mailto:kbr@...787...> > Internet <http://www.computerbild.de/> http://www.computerbild.de > > Besucheradresse: > Caffamacherreihe 1 > 20350 Hamburg > > Diese E-Mail und eventuelle Anlagen k?nnen vertrauliche und/oder rechtlich > gesch?tzte Informationen enthalten. Wenn Sie nicht der richtige Adressat > sind oder diese E-Mail irrt?mlich erhalten haben, informieren Sie bitte > sofort den Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren > sowie die unbefugte Weitergabe dieser Mail sind nicht gestattet. > > This e-mail and any attachments may contain confidential and/or privileged > information. If you are not the intended recipient (or have received this > e-mail in error) please notify the sender immediately and destroy this > e-mail. Any unauthorized copying, disclosure or distribution of the material > in this e-mail is strictly forbidden. > ----- End forwarded message -----

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General-purpose projective transforms
by Bob Jamison 15 Apr '05

15 Apr '05

Hi, I saw on the web a CS course paper by a Prof Chuck Stewart of RPI, about a simple mechanism for achieving projective transforms. http://www.cs.rpi.edu/~stewart/math_vision/lec9.pdf Basically you take 4 corners of a rectangle (like the corners of a selection marquee), a, b, c, d. Move one or more of the points to a', b', c', d'. Calculate the transform of the points (and the rectangle they describe) to the new points. Apply this to the selected object(s). Once this generalized projective transform is working, it can be specialized to its various subclasses, such as perspective, affine, shear, skew, etc. An easy way to achieve this, IMHO, would be to constrain their movement via the keyboard. Does this appear to be a valid new feature that we might want? Bob Here is a textified snippet of the paper: Projective Transformations ========================== The study of transformations and their properties (especially their invariants) is fundamental to geometry. o A projective transformation is an invertible mapping that preserves colinearity. o Projective transformations are also known as homographies, projectivities and colineations. o Projective transformations may be represented by a 3x3 invertible matrix: x' = Hx Note that H is determined up to an arbitrary scale factor so it has 8 degrees of freedom. o The perspective projection of a planar surface in the world reduces to a plane homography. The composition of two homographies is also a homography. Thus, two different images of a planar surface are related by a homography. --- These facts explain our practical interest in homographies. o Even though the matrix is 3x3, this is still a transformation of two-dimensional objects. Example: Computing Projective Transformations ============================================= Suppose we have an image of the face of a building that has severe perspective distortions. If we know, for example, the dimensions of a window or door that appears in the image, we can compute a transformation that removes these distortions. o Suppose the width of the door is w and the height is h. Let the ratio be r = h/w. o Find the four corners in the image. Call the locations x1 through x4. o Designate four locations for these to map to: (0, 0, 1)T, (1, 0, 1)T, (0, r, 1)T, and (1, r, 1)T Note that we are creating an arbitrary Euclidean coordinate in the image. o These four "correspondences" allow us to compute a unique transformation, H. o We apply this transformation to the entire image. It undoes the effects of the projective distortion. Projective Transformations of Lines and Conics ============================================== o Using the basic result x' = Hx we can calculate the perspective transformations of lines and conics. o Lines transform as l' = H(-T)l where H(-T) is the inverse of the transpose of H. o Conics transform as C' = H(-T)CH(-1). o Dual conics transform as C*' = HC*H.

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