[cairo] PS level changing

Marek Kasik marek.kasik at gmail.com
Wed Mar 26 04:17:16 PDT 2008

Hello Carl,
I wanted to set the PS-level to the maximum PS-level supported by the
printer. I thought that the PS-level 3 files are smaller than PS-level
2 files and that it can improve speed of communication (for example).
But now I see that Cairo prefers compatibility. So, I will follow this
I wanted to fix bug http://bugzilla.gnome.org/show_bug.cgi?id=509788
(the compatibility was solved by Cairo 1.5.6, but now it prints with
PS-level 2 on PS-level 3 printers).


    Marek Kasik

On Tue, Mar 25, 2008 at 6:50 PM, Carl Worth <cworth at cworth.org> wrote:
> On Tue, 25 Mar 2008 16:07:31 +0100, "Marek Kasik" wrote:
> > I would like to ask you one question about Cairo. I need to change PS level
> > of generated cairo_surface_t from 2 to 3, because of printers which supports
> > PS level 3 (default level is 2). I tried to use function
> > cairo_ps_surface_restrict_to_level(), but it doesn't help. It only decreases
> > the PS level (3 -> 2), but doesn't increase it.
> > Is there any other way to change the level of generated surface?
> > I use cairo 1.5.14.
> Hi Marek,
> The intent here is that cairo will automatically compute the minimal
> required PostScript level to capture all of your cairo drawing as
> accurately as possible, but never to exceed the minimum level you set
> with cairo_ps_surface_restrict_to_level.
> That is, if by default cairo is emitting PostScript level 2 rather
> than PostScript level 3 then that should be because cairo didn't see
> any benefit that could be obtained with any Level 3-specific feature
> of PostScript.
> So what actual problem are you having? Is there some Level 3-specific
> feature that you wish cairo would take advantage of and it's not?
> -Carl

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