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.
