[cairo] wrong kerning while scaling the whole drawing

[Behdad Esfahbod]

Please see:
https://bugzilla.gnome.org/show_bug.cgi?id=341481

I have a patch for this locally.  Will push it out in a release today.

behdad

On 10/26/2009 10:57 AM, Claudio Cilloni wrote:
> Hi all.
>
> This is my first time signalling a bug. I apologize if I'm doing this in some
> wrong way.
>
> I found an error in the kerning calculations while scaling the whole document.
> I made a simple test-case python program:
>
> ---------------------------------------------------------------------------------
> import pango, cairo, pangocairo
>
> sf = 72 / 25.4
>
> surface = cairo.PDFSurface('/tmp/test.pdf', 210*sf, 297*sf)
> ctx = cairo.Context(surface)
>
> ctx.scale(sf, sf)
>
> pctx = pangocairo.CairoContext(ctx)
> pctx.new_path()
> pctx.move_to(20, 20)
>
> layout = pctx.create_layout()
> layout.set_text('Ve Te To')
> pctx.show_layout(layout)
>
> surface.finish()
> ---------------------------------------------------------------------------------
>
> As you can see in the /tmp/test.pdf file, the lowercase letters are too near
> to the preceding uppercase letters. This behaviour can be accentuated
> increasing the value of the sf variable. With sf = 1, the letter kerning
> seems to be ok.
>
> I'm running cairo-1.8.8, pango-1.24.5, python-2.6.2, pycairo-1.8.8.
>
> Thanks for you help!
> Ciao.
>
> P.S.: there is a way to disable kerning?
>
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