print.m

[Ben Abbott]

On Apr 29, 2009, at 10:04 PM, Michael D. Godfrey wrote:

>> Running with the gnuplot terminal set to wxt (export GNUTERM=wxt),
> I get:
> octave:1> test_print
>        line 0: undefined variable: size
>
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> gdImageStringFT: Could not find/open font while printing string  
> figure size is 8x6 inches with font
> gdImageStringFT: Could not find/open font while printing string 2  
> with font
> ============================================================
>
> There are quite a lot of differences between X11 on Mac and on the  
> various Linux systems.
> Most are converging on xorg, but by differing paths and, of course,  
> with differing sets of fonts.
>
> Why the use of "paperposition" makes a difference to fonts is a  
> mystery to me.  It would be
> good to track that down.
>
> Michael

I've tracked done all the problems we've seen on this thread (sort of).

There are three errors.

(1) The plotting to the screen with gnuplot < 4.3 the error below  
occurs for wxt, but not x11 or aqua. For gnuplot 4.2.5, x11 also  
produces this error message.

	line 0: undefined variable: size

This error is related to the "set term wxt ..." command.

	set terminal wxt enhanced title "Figure 1" size 560,420

The wxt terminal should be treated the same as the x11 terminal in  
gnuplot_drawnow.  This is easily corrected with a patch (I've just  
pushed a changeset fixing this). Additionally, the capability to set  
the position/size of the figure window is not part of 4.2.5, so the  
version number associated with this feature needed to be changed in  
__gnuplot_has_feature__.m.

(2) The error below occurs for x11 (not for wxt or aqua) with gnuplot  
 > 4.2.3. It coincides with the presence of a superscript. For  
example; 'title ("Super^{Script}")'

	setting font to ,12

If I change from the default anonymous fontname to "Arial"

	set (0, "defaulttextfontname", "Arial")
	set (0, "defaultaxesfontname", "Arial")

Then I get

	setting font to Arial,12

Running 3.0.5, I see the same effect.

	octave:1> x = 0:0.01:5;
	octave:2> plot(x,sin(x),x,cos(x))
	octave:3> xlabel('x-axis')
	octave:4> ylabel('amplitude')
	octave:5> title("Super^{Script}")
	octave:6> setting font to Helvetica,10
	setting font to Helvetica,10

Thus, I assume this (gnuplot) problem is unrelated to recent  
changes ... and I don't know how to fix it.

(3) The error below occurs for x11, wxt, and aqua with gnuplot =  
4.2.3. It coincides with the presence of a superscript. For example;  
'title ("Super^{Script}")'. I notice the x11 font used for the title  
is different when there is a superscript. Also, this error is  
suppressed when the paperposition is changed to 3x2 inches, but only  
because the title is not visible (is it not rendered).

gdImageStringFT: Could not find/open font while printing string figure  
size is 8x6 inches with font
gdImageStringFT: Could not find/open font while printing string 2 with  
font

When I change my default fontname, these errors go away. Changing the  
default means using a specific font. As before, "Arial" works for me.

	set (0, "defaulttextfontname", "Arial")
	set (0, "defaultaxesfontname", "Arial")

Michael, please comment if my understanding isn't consistent with your  
experience.

Ben