Thomas,
As John suggested before, please check if the size differences go away
if you use the same dpi, actually dpi=72.
After some quick look, it seems that the osx backend does not scale
the font size correctly respecting the dpi.
At line 124 of bacend_macosx.py,
size = prop.get_size_in_points()
weight = prop.get_weight()
style = prop.get_style()
gc.draw_text(x, y, unicode(s), family, size, weight, style, angle)
My quick guess is that replacing
size => size*self.dpi/72.
in the last call may solve the problem. Since I don't use the osx
backend, I wonder if others can test this.
-JJ
On Thu, Apr 30, 2009 at 9:32 AM, Michael Droettboom <md...@stsci.edu> wrote:
> I forwarded this message to Michiel de Hoon, the author of the Mac OS-X
> backend, in case he has any thoughts.
>
> Mike
>
> Thomas Robitaille wrote:
>>
>> Hi Jae-Jong and John,
>>
>> Thanks for your replies! While experimenting with this to send
>> screenshots, I realized that my default backend was set to MacOSX, not
>> WXAgg. The WXAgg output to the screen actually agrees with the PNG output in
>> terms of font sizes. But the font sizes differ between the MacOSX and WXAgg
>> backends. Attached are screenshots using the MacOSX and WXAgg backends. You
>> can see the font size is different. Is this a bug?
>>
>> Thanks,
>>
>> Thomas
>>
>>
>>
>> ------------------------------------------------------------------------
>>
>>
>> ------------------------------------------------------------------------
>>
>>
>> On 29 Apr 2009, at 00:24, Jae-Joon Lee wrote:
>>
>>> On Tue, Apr 28, 2009 at 11:09 PM, John Hunter <jdh2...@gmail.com> wrote:
>>>>
>>>> If you want the relative fontsizes in the figure window and saved figure
>>>> to
>>>> agree, pass the same "dpi" to the figure command and savefig command.
>>>
>>> John,
>>> I thought the font size (which is specified in points) is independent
>>> of dpi, i.e., font size in "pixel" actually scales with the dpi. I
>>> think it should be filed as a bug if the relative font size depends on
>>> the dpi.
>>>
>>> Anyhow, I just did a quick test and the (relative) font size does not
>>> seem to vary with dpi.
>>>
>>> Thomas,
>>> What version of mpl are you using?
>>> With the mpl from the svn trunk, I don't see any significant change as
>>> you described.
>>> The WxAgg figure and the png output are actually drawn by an identical
>>> backend, so there should be no significant difference. There can be
>>> some subtle difference due to different dpi, but I don't see a
>>> difference as large as 30%. Can you post a some sample images? i.e., a
>>> screenshot of WxAgg figure and the png output.
>>>
>>> I can see that the text in pdf output occupies a bit larger area than
>>> png (when usetex=False), but, to me, this seems to be due to different
>>> amount of kernings (it seems that no kerning is applied for pdf text)
>>> instead of different font size.
>>>
>>> So, can you first check if the difference goes away when you use same
>>> dpi as John suggested? And if that is the case, can you try the latest
>>> svn and check if the relative font size still depends on the dpi?
>>>
>>> Regards,
>>>
>>> -JJ
>>
>> ------------------------------------------------------------------------
>>
>>
>> ------------------------------------------------------------------------------
>> Register Now & Save for Velocity, the Web Performance & Operations
>> Conference from O'Reilly Media. Velocity features a full day of expert-led,
>> hands-on workshops and two days of sessions from industry leaders in
>> dedicated Performance & Operations tracks. Use code vel09scf and Save an
>> extra 15% before 5/3. http://p.sf.net/sfu/velocityconf
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> Matplotlib-users mailing list
>> Matplotlib-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>
> --
> Michael Droettboom
> Science Software Branch
> Operations and Engineering Division
> Space Telescope Science Institute
> Operated by AURA for NASA
>
>
------------------------------------------------------------------------------
Register Now & Save for Velocity, the Web Performance & Operations
Conference from O'Reilly Media. Velocity features a full day of
expert-led, hands-on workshops and two days of sessions from industry
leaders in dedicated Performance & Operations tracks. Use code vel09scf
and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-users
