gnuplot-beta

Emf terminal scales point size with canvas size

[Benjamin L. <lin...@gm...>]

Hello list,

In a current 4.3.0 build the emf terminal scales the point size with the 
terminal size.
This is contrary to what other terminals e.g. png or ps do.

Testcase:
set pointsize 2

set term emf size 512,384
set output "test512x384.emf"
plot [0:2*pi] sin(x) with linespoints

set term emf size 1024,768
set output "test1024x768.emf"
plot [0:2*pi] sin(x) with linespoints

set term post size 16cm,12cm
set output "test16x12.ps"
plot [0:2*pi] sin(x) with linespoints

set term post size 8cm,6cm
set output "test8x6.ps"
plot [0:2*pi] sin(x) with linespoints

set term png size 512,384
set output "test512x384.png"
plot [0:2*pi] sin(x) with linespoints

set term png size 1024,768
set output "test1024x768.png"
plot [0:2*pi] sin(x) with linespoints

set output


The pointsize in "test1024x768.emf" is visibly larger than in 
"test512x384.emf", even if one scales both terminals to 100% of their size.
As the linewidth or the fontsize are independent of the actual terminal 
size, so I think should the point size be.

benjamin

Re: Emf terminal scales point size with canvas size

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

On Monday 31 August 2009 11:45:39 Benjamin Lindner wrote:
> Hello list,
> 
> In a current 4.3.0 build the emf terminal scales the point size with the 
> terminal size.
> This is contrary to what other terminals e.g. png or ps do.

I think it's more complicated than that.
Various terminals do various things.  
Some have a fixed point size (particularly the old plotter drivers where
the points are drawn via a hardware function).
Some scale by terminal size.  
Some (as I recall) scale by font size.

It seems a reasonable goal to have all the drivers do the same thing,
but before making any changed I'd like first to see a list of which terminals
do what right now and how many of them can be easily modified to match
a common convention for the behaviour.

	Ethan 


> Testcase:
> set pointsize 2
> 
> set term emf size 512,384
> set output "test512x384.emf"
> plot [0:2*pi] sin(x) with linespoints
> 
> set term emf size 1024,768
> set output "test1024x768.emf"
> plot [0:2*pi] sin(x) with linespoints
> 
> set term post size 16cm,12cm
> set output "test16x12.ps"
> plot [0:2*pi] sin(x) with linespoints
> 
> set term post size 8cm,6cm
> set output "test8x6.ps"
> plot [0:2*pi] sin(x) with linespoints
> 
> set term png size 512,384
> set output "test512x384.png"
> plot [0:2*pi] sin(x) with linespoints
> 
> set term png size 1024,768
> set output "test1024x768.png"
> plot [0:2*pi] sin(x) with linespoints
> 
> set output
> 
> 
> The pointsize in "test1024x768.emf" is visibly larger than in 
> "test512x384.emf", even if one scales both terminals to 100% of their size.
> As the linewidth or the fontsize are independent of the actual terminal 
> size, so I think should the point size be.
> 
> benjamin
> 
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-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742

Re: Emf terminal scales point size with canvas size

[Benjamin L. <lin...@gm...>]

Ethan Merritt wrote:
> On Monday 31 August 2009 11:45:39 Benjamin Lindner wrote:
>> Hello list,
>>
>> In a current 4.3.0 build the emf terminal scales the point size with the 
>> terminal size.
>> This is contrary to what other terminals e.g. png or ps do.
> 
> I think it's more complicated than that.
> Various terminals do various things.  
> Some have a fixed point size (particularly the old plotter drivers where
> the points are drawn via a hardware function).
> Some scale by terminal size.  
> Some (as I recall) scale by font size.
> 
> It seems a reasonable goal to have all the drivers do the same thing,
> but before making any changed I'd like first to see a list of which terminals
> do what right now and how many of them can be easily modified to match
> a common convention for the behaviour.
> 

Well to start the list, I can provide:

term  |  scale ps with term size?  |  scale ps with font size?
--------------------------------------------------------------
  emf           yes                        no
  png           no                         no
  gif           no                         no
jpeg           no                         no
   ps           no                         no
  eps           no                         no


benjamin