Re: Again: canvas size

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

On Wednesday 12 October 2005 02:39 pm, Harald Harders wrote:
> 
> I of course would also agree with a new coordinate system that may really
> use absolute coordinates as millimeters. But this seems not to be possible
> because many terminals do not have this measure.

But also many terminals (essentially ALL of them :-) do not consistently
support sizes greater than 1.

Here is a quick survey of terminals I can easily test.

Arguably, the only terminal to get it right is mif.trm.

If I am being generous, I can point out that I patched the abort/failure
in cgm.trm last week.

If I am being even more generous, then I can accept that fig.trm also does
something reasonable although it's not what I expected it to do.

All other terminals that I tested have problems of varying severity.

Test sequence of commands
---------------------------

gnuplot> set size 2,2
gnuplot> set term <TERMINAL>
gnuplot> set output <foo.TERMINAL>
gnuplot> plot sin(x)

Results
---------

post.trm	full plot is drawn - bounding box goes negative
gd.trm		full plot is drawn - size is twice that requested
fig.trm		full plot is drawn - size is twice that expected

mif.trm		full plot is drawn but bounding box describes only
		lower left corner. Arguably this is the only terminal
		to get it right!

dumb.trm	segfault after next command

pdf.trm		lower left quarter of plot is drawn

x11.trm		lower left quarter of plot is drawn

epslatex	left 2/3 of plot is drawn  (bizarre!)

cgm.trm		gnuplot: ../term/cgm.trm:1282: CGM_write_int: 
		Assertion `value <= 32767' failed.
		Abort

emf.trm		gnuplot: ../term/emf.trm:860: EMF_move: 
		Assertion `x < term->xmax && y < term->ymax' failed.
		Abort


-- 
Ethan A Merritt       merritt@u.washington.edu
Biomolecular Structure Center
Mailstop 357742
University of Washington, Seattle, WA 98195