[cairo] Problems printing dotted/dashed lines - cairo_set_dash working?

Andrea Canciani ranma42 at gmail.com
Fri Jun 24 06:18:48 PDT 2011

On Fri, Feb 18, 2011 at 8:55 AM, Ian <ian at underpressuredivers.com> wrote:
>> -----Original Message-----
>> From: Andrea Canciani [mailto:ranma42 at gmail.com]
>  >
>> > I want to print a line of the grid dotted or dashed.
>> > And I added these two lines before the "cairo_move_to":
>> >
>> >  static const double dotted[] = {1.0};
>> >  cairo_set_dash(cr, dotted, 1, 0);
>> >
>> > This had no effect and the line is still printed solid
>> Can you please check if setting a small dash offset causes the line to
> appear
>> dashed? It might be useful to locate the problem with more accuracy.
>> Andrea
> Nope - dotted with {1.0} and dashed with {4.0, 1.0} and {1.0, 1.0} all draw
> solid in Windows. With the same app running in Linux they draw dotted/dashed
> as they should.
> I just attached a small test printing app with this (otherwise unrelated)
> GTK bug, and I included some lines in it to demo this problem too:
> https://bugzilla.gnome.org/show_bug.cgi?id=642655

Can you provide a simple cairo-only C application (that can easily be
in a cairo test case)?

Sorry for the long delay, but in the last few days the win32 cairo build system
started working again, so I'm having a look at old bugs that I have been unable
to look into so far.


More information about the cairo mailing list