[NTG-context] Re: how to include an an svg file?

2024-03-16 Thread Jean-Pierre Delange

Dear CTX wizards,

The commands given by Hans don't work properly in my case (with CTX on 
Windows 11). I am probably ignorant of how to implement \startMPpage. 
I'm not a "MetaPost lover", but I'd like to understand something; 
especially as I know how to make simple frames to include summaries.


In any case, the MWE below correctly displays the "smile" images (in 
*.pdf format) and incorrectly displays the smile.svg image). On the 
other hand, the \startMPpage script given by Hans only produces a white 
square. The *.log is attached.


The MWE :

\starttext

\startchapter[title={MetaPost}]


First : a draw sample with a simple command %\externalfigure


\externalfigure[smile.pdf]


% Hans comments on Metapost


Now gives the attached but it took me a while to figure out what works. 
An inkscape export adds for instance something (globally applied) that 
is not in the svg file (which actually derived from tiger.svg as 
mentioned in the file).



To be honest this is a horrible file and a good example of making things 
more complex than needed (probably common in wysiwyg applications), 
although we already had the machinery in the mp/pdf converter.



The biggest issue here is that one has to put some constrants in place 
order to make it work in e.g. sumatra (mypdf) and acrobat (which here 
actually does weird erratic things when I play with another test).



As with much complex svg, browsers also differ in interpretation o fsome 
features so it's hard to figure out what to do when there are 
conflicting demands. (Pointing to something that works tomorrow doesn't 
mean it worked when we tried to implement something yesterday.)



For Hraban - who mentioned it - i also added support for group opacity 
and transformed shades.



Hans Hagen


% If we use another call to the same smile drawing (but in *.svg format)

% the svg file is given by Inkscape (as the smile.pdf, exported through 
Inkscape)



\startMPcode

draw lmt_svg [ filename = "smile.svg"]

\stopMPcode



\stopchapter


\startchapter[title={Hans tricky drawing}]


Now, see the results of Hans has given to \quote{metapost lovers}, here 
is some of the trickery used :



\startMPpage[offset=1ts]


draw image (

fill (unitsquare xscaled 10cm yscaled 4cm)

withcolor svgcolor(0.5,0,0)

;


registerluminositygroup ("test") (

fill (unitsquare scaled 2cm) shifted (1cm,1cm)

withshademethod "circular"

withshadecolors (.6,.1)

) ;


applyluminositygroup ("test") (

fill (unitsquare scaled 2cm) shifted (1cm,1cm)

withshademethod "circular"

) ;


draw luminositygroup (

fill (unitsquare scaled 2cm) shifted (4cm,1cm)

withshademethod "circular"

withshadecolors (.6,.1)

) (

fill (unitsquare scaled 2cm) shifted (4cm,1cm)

withshademethod "circular"

) ;


draw luminosityshade (

(unitsquare scaled 2cm) shifted (7cm,1cm)

) (

withshademethod "circular"

withshadecolors (.6,.1)

) (

withshademethod "circular"

) ;

) ;


\stopMPpage

\stopchapter


\stoptext


Le 15/03/2024 à 20:39, Hans Hagen via ntg-context a écrit :

On 3/13/2024 9:16 AM, Henning Hraban Ramm wrote:

Am 12.03.24 um 23:59 schrieb seyal zavira:
You are correct. when i convert this svg to pdf via inkscape it 
works like a charm.


But what is standard way of including an svg file with context if we 
want to inkscape render the images?


\externalfigure[smile]

without any other settings, but inkscape must be callable on the 
command line (which doesn’t work for me on MacOS any more, must 
investigate…).

    \startMPcode
    draw lmt_svg [ filename = "smile.svg"]
    \stopMPcode

Now gives the attached but it took me a while to figure out what 
works. An inkscape export adds for instance something (globally 
applied) that is not in the svg file (which actually derived from 
tiger.svg as mentioned in the file).


To be honest this is a horrible file and a good example of making 
things more complex than needed (probably common in wysiwyg 
applications), although we already had the machinery in the mp/pdf 
converter.


The biggest issue here is that one has to put some constrants in place 
order to make it work in e.g. sumatra (mypdf) and acrobat (which here 
actually does weird erratic things when I play with another test).


As with much complex svg, browsers also differ in interpretation o 
fsome features so it's hard to figure out what to do when there are 
conflicting demands. (Pointing to something that works tomorrow 
doesn't mean it worked when we tried to implement something yesterday.)


For Hraben - who mentioned it - i also added support for group opacity 
and transformed shades.


In the process I tried a few inkscape options (pdf export) but some 
produce faulty files (with missing stuff) so i guess we have a complex 
situation in general. That said, as long as one sticks to reliable and 
clean code (plain svg) it should mostly work out.


Text is another matter because svg dropped glyph support so now 
everything has to go through font features which in turn means that i

[NTG-context] Re: how to include an an svg file?

2024-03-15 Thread seyal zavira
Thanks you and harban for all your thorough explanation.

On Fri, 15 Mar 2024, 23:11 Hans Hagen via ntg-context, 
wrote:

> On 3/13/2024 9:16 AM, Henning Hraban Ramm wrote:
> > Am 12.03.24 um 23:59 schrieb seyal zavira:
> >> You are correct. when i convert this svg to pdf via inkscape it works
> >> like a charm.
> >>
> >> But what is standard way of including an svg file with context if we
> >> want to inkscape render the images?
> >
> > \externalfigure[smile]
> >
> > without any other settings, but inkscape must be callable on the command
> > line (which doesn’t work for me on MacOS any more, must investigate…).
>  \startMPcode
>  draw lmt_svg [ filename = "smile.svg"]
>  \stopMPcode
>
> Now gives the attached but it took me a while to figure out what works.
> An inkscape export adds for instance something (globally applied) that
> is not in the svg file (which actually derived from tiger.svg as
> mentioned in the file).
>
> To be honest this is a horrible file and a good example of making things
> more complex than needed (probably common in wysiwyg applications),
> although we already had the machinery in the mp/pdf converter.
>
> The biggest issue here is that one has to put some constrants in place
> order to make it work in e.g. sumatra (mypdf) and acrobat (which here
> actually does weird erratic things when I play with another test).
>
> As with much complex svg, browsers also differ in interpretation o fsome
> features so it's hard to figure out what to do when there are
> conflicting demands. (Pointing to something that works tomorrow doesn't
> mean it worked when we tried to implement something yesterday.)
>
> For Hraben - who mentioned it - i also added support for group opacity
> and transformed shades.
>
> In the process I tried a few inkscape options (pdf export) but some
> produce faulty files (with missing stuff) so i guess we have a complex
> situation in general. That said, as long as one sticks to reliable and
> clean code (plain svg) it should mostly work out.
>
> Text is another matter because svg dropped glyph support so now
> everything has to go through font features which in turn means that if
> one uses svg as output format one has to specify every character with
> possible abuse of a substitution feature that accesses it. So that is no
> longer a real interesting option, unless of course one exports all text
> as curves, just to be sure.
>
> (I will extend general text suport but it will always be suboptimal but
> then, svg is not a long term archival format anyway.)
>
> No upload yet as i also want to do some cleanup,
>
> ps. For metapost lovers, here is some of the trickery used:
>
> \startMPpage[offset=1ts]
>
>  draw image (
>  fill (unitsquare xscaled 10cm yscaled 4cm)
>  withcolor svgcolor(0.5,0,0)
>  ;
>
>  registerluminositygroup ("test") (
>  fill (unitsquare scaled 2cm) shifted (1cm,1cm)
>  withshademethod "circular"
>  withshadecolors (.6,.1)
>  ) ;
>
>  applyluminositygroup ("test") (
>  fill (unitsquare scaled 2cm) shifted (1cm,1cm)
>  withshademethod "circular"
>  ) ;
>
>  draw luminositygroup (
>  fill (unitsquare scaled 2cm) shifted (4cm,1cm)
>  withshademethod "circular"
>  withshadecolors (.6,.1)
>  ) (
>  fill (unitsquare scaled 2cm) shifted (4cm,1cm)
>  withshademethod "circular"
>  ) ;
>
>  draw luminosityshade (
>  (unitsquare scaled 2cm) shifted (7cm,1cm)
>  ) (
>  withshademethod "circular"
>  withshadecolors (.6,.1)
>  ) (
>  withshademethod "circular"
>  ) ;
>  ) ;
>
> \stopMPpage
>
> Not that intuitive and a bit ugly deep down but it works (there was no
> need to extend mp btw as we already have graphic grouping in the engine).
>
> Hans
>
>
> -
>Hans Hagen | PRAGMA ADE
>Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -
>
> ___
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> webpage  : https://www.pragma-ade.nl / https://context.aanhet.net (mirror)
> archive  : https://github.com/contextgarden/context
> wiki : https://wiki.contextgarden.net
>
> ___
>
___
If your question is of interest

[NTG-context] Re: how to include an an svg file?

2024-03-15 Thread Hans Hagen via ntg-context

On 3/13/2024 9:16 AM, Henning Hraban Ramm wrote:

Am 12.03.24 um 23:59 schrieb seyal zavira:
You are correct. when i convert this svg to pdf via inkscape it works 
like a charm.


But what is standard way of including an svg file with context if we 
want to inkscape render the images?


\externalfigure[smile]

without any other settings, but inkscape must be callable on the command 
line (which doesn’t work for me on MacOS any more, must investigate…).

\startMPcode
draw lmt_svg [ filename = "smile.svg"]
\stopMPcode

Now gives the attached but it took me a while to figure out what works. 
An inkscape export adds for instance something (globally applied) that 
is not in the svg file (which actually derived from tiger.svg as 
mentioned in the file).


To be honest this is a horrible file and a good example of making things 
more complex than needed (probably common in wysiwyg applications), 
although we already had the machinery in the mp/pdf converter.


The biggest issue here is that one has to put some constrants in place 
order to make it work in e.g. sumatra (mypdf) and acrobat (which here 
actually does weird erratic things when I play with another test).


As with much complex svg, browsers also differ in interpretation o fsome 
features so it's hard to figure out what to do when there are 
conflicting demands. (Pointing to something that works tomorrow doesn't 
mean it worked when we tried to implement something yesterday.)


For Hraben - who mentioned it - i also added support for group opacity 
and transformed shades.


In the process I tried a few inkscape options (pdf export) but some 
produce faulty files (with missing stuff) so i guess we have a complex 
situation in general. That said, as long as one sticks to reliable and 
clean code (plain svg) it should mostly work out.


Text is another matter because svg dropped glyph support so now 
everything has to go through font features which in turn means that if 
one uses svg as output format one has to specify every character with 
possible abuse of a substitution feature that accesses it. So that is no 
longer a real interesting option, unless of course one exports all text 
as curves, just to be sure.


(I will extend general text suport but it will always be suboptimal but 
then, svg is not a long term archival format anyway.)


No upload yet as i also want to do some cleanup,

ps. For metapost lovers, here is some of the trickery used:

\startMPpage[offset=1ts]

draw image (
fill (unitsquare xscaled 10cm yscaled 4cm)
withcolor svgcolor(0.5,0,0)
;

registerluminositygroup ("test") (
fill (unitsquare scaled 2cm) shifted (1cm,1cm)
withshademethod "circular"
withshadecolors (.6,.1)
) ;

applyluminositygroup ("test") (
fill (unitsquare scaled 2cm) shifted (1cm,1cm)
withshademethod "circular"
) ;

draw luminositygroup (
fill (unitsquare scaled 2cm) shifted (4cm,1cm)
withshademethod "circular"
withshadecolors (.6,.1)
) (
fill (unitsquare scaled 2cm) shifted (4cm,1cm)
withshademethod "circular"
) ;

draw luminosityshade (
(unitsquare scaled 2cm) shifted (7cm,1cm)
) (
withshademethod "circular"
withshadecolors (.6,.1)
) (
withshademethod "circular"
) ;
) ;

\stopMPpage

Not that intuitive and a bit ugly deep down but it works (there was no 
need to extend mp btw as we already have graphic grouping in the engine).


Hans


-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
   tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-


smile-test.pdf
Description: Adobe PDF document


luminosity.pdf
Description: Adobe PDF document
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[NTG-context] Re: how to include an an svg file?

2024-03-13 Thread Jean-Pierre Delange
Hraban,
Thank a lot for these clarifications !
Jean-Pierre


> Le 13 mars 2024 à 13:41, Henning Hraban Ramm  a écrit :
> 
> Am 13.03.24 um 13:14 schrieb Jean-Pierre Delange:
>> Hi Hraban & Seyal
>> I can confirm that converting the *.svg file into a *.pdf file displays the 
>> colour shades correctly ...
>> (I used Gimp to export the smile.svg file to a smile03.pdf file).
> 
> Gimp is a really bad choice in this case, since it converts vectors into 
> pixels.
> And if you place a PDF, no further conversion is needed.
> 
> If you have problems with SVGs, use Inkscape (or some commercial alternative 
> like Affinity Designer or Adobe Illustrator) for PDF conversion.
> 
>> The MWE below works correctly, even if you have to make finer adjustments to 
>> place the figure in a precise position on the page. As I'm in the process of 
>> enriching and clarifying a few pages of the ConTeXt wiki and the French 
>> wikibook, I'm interested in the details concerning the position of figures, 
>> images and photos etc. So please let me know (in private mail) how you make 
>> your documents (a MWE will do).
> 
> Position options:
> * relative placement as floats, i.e. \placefigure
> * absolute placement on layers, i.e. \setlayer
> * relative corrections with \offset (also within floats)
> 
> Hraban
> ___
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> Wiki!
> 
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[NTG-context] Re: how to include an an svg file?

2024-03-13 Thread Henning Hraban Ramm

Am 13.03.24 um 13:14 schrieb Jean-Pierre Delange:

Hi Hraban & Seyal

I can confirm that converting the *.svg file into a *.pdf file displays 
the colour shades correctly ...

(I used Gimp to export the smile.svg file to a smile03.pdf file).


Gimp is a really bad choice in this case, since it converts vectors into 
pixels.

And if you place a PDF, no further conversion is needed.

If you have problems with SVGs, use Inkscape (or some commercial 
alternative like Affinity Designer or Adobe Illustrator) for PDF conversion.


The MWE below works correctly, even if you have to make finer 
adjustments to place the figure in a precise position on the page. As 
I'm in the process of enriching and clarifying a few pages of the 
ConTeXt wiki and the French wikibook, I'm interested in the details 
concerning the position of figures, images and photos etc. So please let 
me know (in private mail) how you make your documents (a MWE will do).


Position options:
* relative placement as floats, i.e. \placefigure
* absolute placement on layers, i.e. \setlayer
* relative corrections with \offset (also within floats)

Hraban
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[NTG-context] Re: how to include an an svg file?

2024-03-13 Thread Jean-Pierre Delange

Hi Hraban & Seyal

I can confirm that converting the *.svg file into a *.pdf file displays 
the colour shades correctly ...

(I used Gimp to export the smile.svg file to a smile03.pdf file).

The MWE below works correctly, even if you have to make finer 
adjustments to place the figure in a precise position on the page. As 
I'm in the process of enriching and clarifying a few pages of the 
ConTeXt wiki and the French wikibook, I'm interested in the details 
concerning the position of figures, images and photos etc. So please let 
me know (in private mail) how you make your documents (a MWE will do).


\starttext

\input tufte


\externalfigure[smile03.pdf][conversion=mp]

\stoptext



It seems to me that Pablo has been struggling with the fine graining of 
PDF files in recent months, but I think it was more about the 
information contained in the PDF output than the processing of PDF 
images in *.tex file output.



JP


Le 13/03/2024 à 09:16, Henning Hraban Ramm a écrit :

Am 12.03.24 um 23:59 schrieb seyal zavira:
You are correct. when i convert this svg to pdf via inkscape it works 
like a charm.


But what is standard way of including an svg file with context if we 
want to inkscape render the images?


\externalfigure[smile]

without any other settings, but inkscape must be callable on the 
command line (which doesn’t work for me on MacOS any more, must 
investigate…).


Hraban
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ctx-test-metapost-svg.pdf
Description: Adobe PDF document
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[NTG-context] Re: how to include an an svg file?

2024-03-13 Thread Henning Hraban Ramm

Am 12.03.24 um 23:59 schrieb seyal zavira:
You are correct. when i convert this svg to pdf via inkscape it works 
like a charm.


But what is standard way of including an svg file with context if we 
want to inkscape render the images?


\externalfigure[smile]

without any other settings, but inkscape must be callable on the command 
line (which doesn’t work for me on MacOS any more, must investigate…).


Hraban
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[NTG-context] Re: how to include an an svg file?

2024-03-12 Thread seyal zavira
Thanks. I appreciate your work

You are correct. when i convert this svg to pdf via inkscape it works like
a charm.

But what is standard way of including an svg file with context if we want
to inkscape render the images?

On Tue, 12 Mar 2024, 21:51 Hans Hagen,  wrote:

> On 3/12/2024 2:53 PM, seyal zavira wrote:
> > thanks for your reply
> >
> > yes but i don't have problem with regular svgs but when svgs has
> > gradient color it does not produce any color in output.
> >
> > you can see my svg in attachment.
> svg gets worse and worse (esp the inheritance model) ... anyway, i can
> sort of get the gradient but no stepwise gradient opacity (in pdf and
> i'm not going to emulate something) (it's not the most interesting stuff
> to work on unpaid)
>
> but ... i don't know if fixing this breaks something else
>
> Hans
>
> -
>Hans Hagen | PRAGMA ADE
>Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -
>
>
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> the Wiki!
>
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>
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>
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[NTG-context] Re: how to include an an svg file?

2024-03-12 Thread Hans Hagen

On 3/12/2024 2:53 PM, seyal zavira wrote:

thanks for your reply

yes but i don't have problem with regular svgs but when svgs has 
gradient color it does not produce any color in output.


you can see my svg in attachment.
svg gets worse and worse (esp the inheritance model) ... anyway, i can 
sort of get the gradient but no stepwise gradient opacity (in pdf and 
i'm not going to emulate something) (it's not the most interesting stuff 
to work on unpaid)


but ... i don't know if fixing this breaks something else

Hans

-
  Hans Hagen | PRAGMA ADE
  Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
   tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-

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[NTG-context] Re: how to include an an svg file?

2024-03-12 Thread Jean-Pierre Delange
Yes, the code given by Seyal gives only the circle vith eyes and mouth 
without colors (on my computer). But, It seems that one have to deal 
with a more complex lines of code. If I'm not mistaken, MetaPost alone 
natively supports only the 3 colours red, green and blue. To support 
CMYK colour gradients, MetaPost needs to work with Metafun (see here : 
https://wiki.contextgarden.net/Color_in_MetaPost).


Perhaps an image in *.png format is required. But I can't give any 
advice, as I'm not an experienced MetaPost/Metafun user.


see this code below and the result as attached file :

\starttext

\input tufte


\externalfigure[smile.svg][conversion=mp]

\stoptext


Best//JP


Le 12/03/2024 à 15:01, Henning Hraban Ramm a écrit :

Am 12.03.24 um 14:53 schrieb seyal zavira:

 > when i want to put some SVGs in my document the svg does not
    render properly here is the code:
 >
 > \starttext
 > \startMPcode
 > draw lmt_svg [
 > filename = "smile.svg"]
 > \stopMPcode
 > \stoptext


I can confirm the problem also with the regular image call

\externalfigure[smile.svg][conversion=mp]

Hraban
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[NTG-context] Re: how to include an an svg file?

2024-03-12 Thread Henning Hraban Ramm

Am 12.03.24 um 14:53 schrieb seyal zavira:

 > when i want to put some SVGs in my document the svg does not
render properly here is the code:
 >
 > \starttext
 > \startMPcode
 > draw lmt_svg [
 > filename = "smile.svg"]
 > \stopMPcode
 > \stoptext


I can confirm the problem also with the regular image call

\externalfigure[smile.svg][conversion=mp]

Hraban
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[NTG-context] Re: how to include an an svg file?

2024-03-12 Thread seyal zavira
thanks for your reply

yes but i don't have problem with regular svgs but when svgs has gradient
color it does not produce any color in output.

you can see my svg in attachment.

On Tue, Mar 12, 2024 at 9:43 AM Jean-Pierre Delange 
wrote:

> Hi !
>
> Did you have a look at this :
>
> https://wiki.contextgarden.net/SVG
>
> Le 12/03/2024 à 14:36, seyal.zav...@gmail.com a écrit :
> > hi all.
> >
> > when i want to put some SVGs in my document the svg does not render
> properly here is the code:
> >
> > \starttext
> > \startMPcode
> > draw lmt_svg [
> > filename = "smile.svg"]
> > \stopMPcode
> > \stoptext
> >
> > also when i look at evenmore manual at page15, for font Abelone-FREE the
> gradients has rendered properly is there difference between rendering such
> fonts and rendering SVGs?
> >
> > if its a font feature how i can use this font features for my svg?
> >
> ___
> > If your question is of interest to others as well, please add an entry
> to the Wiki!
> >
> > maillist : ntg-context@ntg.nl /
> https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
> > webpage  : https://www.pragma-ade.nl / https://context.aanhet.net
> (mirror)
> > archive  : https://github.com/contextgarden/context
> > wiki : https://wiki.contextgarden.net
> >
> ___
>
> ___
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> the Wiki!
>
> maillist : ntg-context@ntg.nl /
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> wiki : https://wiki.contextgarden.net
>
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>
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[NTG-context] Re: how to include an an svg file?

2024-03-12 Thread Jean-Pierre Delange

Hi !

Did you have a look at this :

https://wiki.contextgarden.net/SVG

Le 12/03/2024 à 14:36, seyal.zav...@gmail.com a écrit :

hi all.

when i want to put some SVGs in my document the svg does not render properly 
here is the code:

\starttext
\startMPcode
draw lmt_svg [
filename = "smile.svg"]
\stopMPcode
\stoptext

also when i look at evenmore manual at page15, for font Abelone-FREE the 
gradients has rendered properly is there difference between rendering such 
fonts and rendering SVGs?

if its a font feature how i can use this font features for my svg?
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