> Hi guys. After install the Athen's tutorial, I have had some error in the
> On Fri, Apr 12, 2013 at 4:53 AM, Tristan Bourgois
> <
[hidden email]> wrote:
>>
>>
>>
>>
>> 2013/4/11 Igor Stasenko <
[hidden email]>
>>>
>>> On 11 April 2013 10:44, Tristan Bourgois <
[hidden email]>
>>> wrote:
>>> >
>>> >
>>> >
>>> > 2013/4/11 Igor Stasenko <
[hidden email]>
>>> >>
>>> >> On 11 April 2013 08:55, Tristan Bourgois <
[hidden email]>
>>> >> wrote:
>>> >> >
>>> >> >
>>> >> >
>>> >> > 2013/4/10 Igor Stasenko <
[hidden email]>
>>> >> >>
>>> >> >>
>>> >> >>
>>> >> >> On 10 April 2013 09:14, Tristan Bourgois
>>> >> >> <
[hidden email]>
>>> >> >> wrote:
>>> >> >>>
>>> >> >>>
>>> >> >>>
>>> >> >>>
>>> >> >>> 2013/4/9 Igor Stasenko <
[hidden email]>
>>> >> >>>>
>>> >> >>>> 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.
>>>
>>
>
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