Usage of pango_layout_set_attributes

[Carlos López González <genetita gmail com>]

Hi again,
so after continue researching I've realized that to apply a different character spacing I need to use Pango Attributes.

So I decided to look the Pango interface for Text Attributes and the Pango Layout attributes interface.

I found that there are two functions to set/get the attributes list to the Pango Layout:

pango_layout_set_attributes ()
pango_layout_get_attributes ()

Looking
 to the code of pango_layout_set_attributes() I realize that it calls 
the internal function pango_layout_clear_lines() that frees the lines of
 the layout.

The question is: why in the implementation of the 
pango_layout_set_markup_with_accel() function it is called the 
pango_layout_set_attributes() function right after the 
pango_layout_set_text function()? 
Shouldn't that invalidate the text lines?

Finally, what's the correct way to use the PangoAttributes over a Layout? Is there any example code?

Thanks 

-- 
Carlos
http://synfig.org