Re: pngcairo performance on Windows

[Ethan M. <merritt@u.washington.edu>]

On Monday 02 November 2009 13:34:38 Tatsuro MATSUOKA wrote:
> Hello
> 
> I have a cvs version of the gnuplot in which the pngpango terminal is available.
> However, 
> 
> Or you can try it by yourself, using my distribution of cvs versions of gnuplot at 
> 
> http://www.tatsuromatsuoka.com/gnuplot/Eng/winbin/ 

I have tried your recent version (31 October) under linux+wine.
I find that it has a strange problem with all fonts.  
The font in the image is extremely large, maybe 100 times (?) larger than requested.
This makes it impossible to check for the specific problem that 
Allin refers to.

Of course, the problem I see may be an artifact of testing under linux + wine,
rather than MSWin.  Does it behave properly under MSWin?

	cheers,

		Ethan



> Regards
> 
> Tatsuro
> 
> --- Allin Cottrell wrote:
> 
> > 
> > It seems there is something not quite right with font-handling
> > under the pngcairo terminal on Windows.  I suspect the problem
> > lies somewhere in the pango/cairo stack for Windows but I thought
> > I'd start here in case anyone has any ideas.
> > 
> > The issue is that the extremities of text get clipped in some
> > contexts. This is with CVS gnuplot built for win32 with
> > pango/cairo support.  I haven't seen this using pngcairo on Linux.
> > 
> > I suppose the first thing is to see if others can replicate the
> > problem.  I've put a simple test file and four examples of PNG
> > output (v8.png uses the verdana font at 8 points and v9 uses
> > verdana at 9 points; the others use the default font for
> > pngcairo).  These PNGs show bits of the letter 'Q' being clipped,
> > plus, in some cases, bits of the x-axis numerals missing.
> > 
> > Do others see this?
> > 
> > -- 
> > Allin Cottrell
> > Department of Economics
> > Wake Forest University
> > 

-- 
Ethan A Merritt