Re: [Gnash-dev] flash swf italic

[Sandro Santilli]

On Tue, Nov 20, 2012 at 01:29:29PM +0800, Zhonghua Zhu wrote:
> After some research, I figured out that italic version of a font can
> be done by matrix if I don't have a italic version of that font on my
> system.
> Like the following:
> 
> // italic
> float lean = 0.5f;
> FT_Matrix matrix;
> matrix.xx = 0x10000L;
> matrix.xy = 0x10000L*lean;
> matrix.yx = 0;
> matrix.yy = 0x10000L;
> FT_Set_Transform(face, &matrix, 0);
> 
> Does gnash need this?

I don't know, if you're sure the Adobe player is "syntetizing"
italic when no such flavor exist on the system (so if you're
sure your SWF is using device fonts and Adobe player shows it
in italic with no further tags) then yes, gnash may need it.

> Maybe I can create a patch about it.
> 
> This is the SWF. The text is in Simplified Chinese.

I've no time to look at it, sorry, but please file a ticket
on savannah about this, with the SWF attached. That ticket
would also be the place where your patch could be applied
if you start working on it. 

I don't remember if we have already testcases using device
fonts, with special fonts shipped with the testsuite for this
specific purpose. It would be great if you could check that
and thus create a testcase for this case too. The testing
framework allows for "expected failures" if this is one such
case. The ideal testcase would be an SWF that a human can run
and read instructions about what should be seen. Then a test
runner would perform pixel checking to verify the output is
the expected one.

--strk;

  ()   Free GIS & Flash consultant/developer
  /\   http://strk.keybit.net/services.html
> 
> 2012/11/18, Sandro Santilli <address@hidden>:
> > Could it be that Gnash is using device rather than embedded
> > fonts ? Or is "italic" something that could be produced with
> > the "definefontalignzones" and/or "csmtextsetting" tags ?
> > Because those two tags aren't implemented.
> >
> > Advice: use -v switch of gnash to get more info about the
> > unimplemented tags, try simplifying the testcase removing
> > anything that doesn't prevent differences to show up and
> > finally attache the SWF here or on a Savannah ticket.
> >
> > --strk;
> >
> >   ()   Free GIS & Flash consultant/developer
> >   /\   http://strk.keybit.net/services.html
> >
> > On Sat, Nov 17, 2012 at 06:56:27PM +0800, Zhonghua Zhu wrote:
> >> i am reading code about gnash and gameswf, and compared with flash
> >> player.
> >>
> >> i did a test.
> >>
> >> 1, create a swf, the main tag is definefont3, definefontalignzones,
> >> defineedittext, csmtextsetting.
> >> 2, so there is glyph text in definefont3.
> >> 3, in defineedittext, text is italic.
> >> 4, i didn't get a italic version of that font.
> >>
> >> flash player rendered that italic text, but like i said , i didn't
> >> have one italic version of that font.
> >>
> >> do you guys know how fp did it? or give some advice?
> >>
> >> when i use a rare font to define edit text, on other platform which
> >> hasn't that font, fp still can render that text like on my platform.
> >>
> >> any advice?
> >


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