My apologies for the insufficient info.This happens after install the tutorial, when i try to reopen the image where i installed ahtens and the tutorial.
Saludos, Mariano On Fri, Apr 26, 2013 at 7:29 AM, Igor Stasenko <siguc...@gmail.com> wrote: > On 26 April 2013 09:07, Mariano Vicente <m.vic...@gmail.com> wrote: > > Hi guys. After install the Athen's tutorial, I have had some error in > the > > image: > > > > Segmentation fault Fri Apr 26 03:59:42 2013 > > > > There is a problem over the image or my vm? > > I added the full log in the attached, > > > hard to say. > when/how it happens? > > > On Fri, Apr 12, 2013 at 4:53 AM, Tristan Bourgois > > <tristan.bourg...@gmail.com> wrote: > >> > >> > >> > >> > >> 2013/4/11 Igor Stasenko <siguc...@gmail.com> > >>> > >>> On 11 April 2013 10:44, Tristan Bourgois <tristan.bourg...@gmail.com> > >>> wrote: > >>> > > >>> > > >>> > > >>> > 2013/4/11 Igor Stasenko <siguc...@gmail.com> > >>> >> > >>> >> On 11 April 2013 08:55, Tristan Bourgois < > tristan.bourg...@gmail.com> > >>> >> wrote: > >>> >> > > >>> >> > > >>> >> > > >>> >> > 2013/4/10 Igor Stasenko <siguc...@gmail.com> > >>> >> >> > >>> >> >> > >>> >> >> > >>> >> >> On 10 April 2013 09:14, Tristan Bourgois > >>> >> >> <tristan.bourg...@gmail.com> > >>> >> >> wrote: > >>> >> >>> > >>> >> >>> > >>> >> >>> > >>> >> >>> > >>> >> >>> 2013/4/9 Igor Stasenko <siguc...@gmail.com> > >>> >> >>>> > >>> >> >>>> Yes, this is a known bug actually, which i demonstrated to > >>> >> >>>> audience > >>> >> >>>> during > >>> >> >>>> tutorial presentation.. > >>> >> >>>> i/cairo miss the correct font matrix setup.. and i need to see > >>> >> >>>> what's > >>> >> >>>> there. > >>> >> >>>> Cairo caching the glyphs in a strange way (so if you never > drawn > >>> >> >>>> anything with given font before and your first drawing will use > >>> >> >>>> some > >>> >> >>>> rotation > >>> >> >>>> then everything will be rendered correctly, but if you already > >>> >> >>>> drawn > >>> >> >>>> anything > >>> >> >>>> it will render them like you shown).. > >>> >> >>>> I'm going to fix that issue when i come back from Lviv. > >>> >> >>>> > >>> >> >>> > >>> >> >>> Super :) > >>> >> >>> > >>> >> >>> Did you also see the cairo_text_path() method? It's very > >>> >> >>> interesting > >>> >> >>> if > >>> >> >>> you want to stroke the letter! > >>> >> >> > >>> >> >> > >>> >> >> Yes but this is more for fancy artistic text. For rendering large > >>> >> >> amounts > >>> >> >> of text (like big lists/source code) you don't want to do that, > >>> >> >> because it will be too slow. > >>> >> >> > >>> >> > > >>> >> > Thanks for the advice I will share it to my team because they want > >>> >> > performance and use text_path instead of show_text. > >>> >> > > >>> >> > >>> >> yes, the freetype library (and i guess you using it) is highly > >>> >> optimized for font rendering. > >>> >> sure thing, cairo path rendering is fast as well, but it is not as > >>> >> specialized for just font rendering as freetype, > >>> >> therefore, i have no doubts that it will be slower. > >>> >> > >>> >> > >>> > > >>> > > >>> > I only use Athens to rendering the graphics framework :) And I try to > >>> > not > >>> > use directly some AthensCairo object to benefit of futur new backend > of > >>> > Athens :) and sincerely you really make a good job of the Athens > >>> > interface! > >>> > It's very easy to use it! In one case I use AthensCairo object. I > have > >>> > to > >>> > use AthensCairoMatrix instead of AthensAffineTransform to represent > the > >>> > transformation of a shape because I have to make an inversion of the > >>> > matrix > >>> > to make a global position to the local position of the shape. > >>> > > >>> Ah, you mean this: > >>> > >>> AthensAffineTransform>>inverted > >>> "answer an inverse transformation of receiver" > >>> self notYetImplemented > >>> > >>> yes, someone has to implement it ;) > >>> > >> > >> If the weather is bad at Brest this week-end I will try to implement it > :) > >> (My last lesson of Matrix calculation is very old!) > >> > >>> But actually you can just use #inverseTransform: aPoint > >>> > >>> i.e. if: > >>> > >>> pt := m transform: somePoint. > >>> > >>> then > >>> > >>> somePoint closeTo: (m inverseTransform: pt) ==> true. > >>> > >>> (close to instead of #= because of float rounding errors) > >>> > >>> > >>> -- > >>> Best regards, > >>> Igor Stasenko. > >>> > >> > > > > > > -- > Best regards, > Igor Stasenko. > >
