gnuplot-beta

Why the gd based terminal does support character entity reference ?

[Tatsuro M. <tma...@ya...>]

Hello

I made a feature request:

Supports character entity reference

https://sourceforge.net/p/gnuplot/feature-requests/440/

As I wrote there, on the gd based terminals, one can use 

for example following code to write a Greek symbol "theta".

set term png
set output 'test.png'
plot sin(x) title '{/:Italic \θ}'
set output

Why this feature only supports on the gd based terminals?

Does anyone know reasons?

Tatsurp

Re: Why the gd based terminal does support character entity reference ?

[sfeam <sf...@us...>]

On Tuesday, 22 March 2016 10:36:44 AM Tatsuro MATSUOKA wrote:
> Hello
> 
> I made a feature request:
> 
> Supports character entity reference
> 
> https://sourceforge.net/p/gnuplot/feature-requests/440/
> 
> As I wrote there, on the gd based terminals, one can use 
> 
> for example following code to write a Greek symbol "theta".
> 
> set term png
> set output 'test.png'
> plot sin(x) title '{/:Italic \θ}'
> set output
> 
> Why this feature only supports on the gd based terminals?
> 
> Does anyone know reasons?

libgd includes a table of character entity names that maps them to
the ISO-10646 code point for that character:

https://github.com/libgd/libgd/blob/master/src/entities.h

The text-handling routine in libgd uses this table to replace
for example "\&theta" with ISO-10646 codepoint 952.

	Ethan

Re: Why the gd based terminal does support character entity reference ?

[Tatsuro M. <tma...@ya...>]

> From: sfeam 

> To: gnuplot-beta Tatsuro MATSUOKA 
> Cc: 
> Date: 2016/3/22, Tue 15:22
> Subject: Re: Why  the gd based terminal does support character entity reference ?
> 
> On Tuesday, 22 March 2016 10:36:44 AM Tatsuro MATSUOKA wrote:
>>  Hello
>> 
>>  I made a feature request:
>> 
>>  Supports character entity reference
>> 
>>  https://sourceforge.net/p/gnuplot/feature-requests/440/
>> 
>>  As I wrote there, on the gd based terminals, one can use 
>> 
>>  for example following code to write a Greek symbol "theta".
>> 
>>  set term png
>>  set output 'test.png'
>>  plot sin(x) title '{/:Italic \θ}'
>>  set output
>> 
>>  Why this feature only supports on the gd based terminals?
>> 
>>  Does anyone know reasons?
> 
> libgd includes a table of character entity names that maps them to
> the ISO-10646 code point for that character:
> 
> https://github.com/libgd/libgd/blob/master/src/entities.h
> 
> The text-handling routine in libgd uses this table to replace
> for example "\&theta" with ISO-10646 codepoint 952.
> 
>     Ethan

Thanks for the explanations.

OK. I understand situations.

Tatsuro