Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On Sun, 8 Jul 2018 11:21:55 +0200 Hans Hagen wrote: > the "externalfigure" variant is an old one that had to deal with > dimensions in a way that avoids overflows > > in a future context (read luatex 1.09+) we go one-pass-mp so we can > have a different approach (i never wanted to add a ton of code for > images) so there externalfigure will scale proportionally too ConTeXt running on the luatex experimental branch under development indeed works with one-pass-MP calculations as opposed to the two-pass mechanism that is standard today. For documents with extensive and complicated MP graphics, this yields a huge gain. Hans is at present working out all side-effects (such as recursive MP/TeX/lua calls) and is cleaning up some old ways of doing things that date from mkii. This might seem somewhat minor but is really exciting for those who use a lot of graphics and MetaPost effects. Alan ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On 7/8/2018 11:02 AM, Marco Patzer wrote:
On Sun, 8 Jul 2018 10:39:52 +0200
Hans Hagen wrote:
On 7/8/2018 1:45 AM, Marco Patzer wrote:
On Sat, 7 Jul 2018 14:27:38 -0600
Alan Braslau wrote:
For "historic" reasons,
draw externalfigure "cow" scaled 5cm ;
normalizes the figure to a square. This will not be changed as it
is a very old feature of MetaFun.
The solution is
draw rawtextext("\externalfigure[cow]") xsized 5cm ;
where one can use xsized, ysized or xysized (taking a pair).
That works indeed. Thanks.
draw figure "" ...
That's what I was looking for. Thanks.
the "externalfigure" variant is an old one that had to deal with
dimensions in a way that avoids overflows
in a future context (read luatex 1.09+) we go one-pass-mp so we can have
a different approach (i never wanted to add a ton of code for images) so
there externalfigure will scale proportionally too
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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Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On Sun, 8 Jul 2018 10:39:52 +0200
Hans Hagen wrote:
> On 7/8/2018 1:45 AM, Marco Patzer wrote:
> > On Sat, 7 Jul 2018 14:27:38 -0600
> > Alan Braslau wrote:
> >
> >> For "historic" reasons,
> >> draw externalfigure "cow" scaled 5cm ;
> >> normalizes the figure to a square. This will not be changed as it
> >> is a very old feature of MetaFun.
> >>
> >> The solution is
> >> draw rawtextext("\externalfigure[cow]") xsized 5cm ;
> >> where one can use xsized, ysized or xysized (taking a pair).
> >
> > That works indeed. Thanks.
> draw figure "" ...
That's what I was looking for. Thanks.
Marco
___
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Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On 7/8/2018 1:45 AM, Marco Patzer wrote:
On Sat, 7 Jul 2018 14:27:38 -0600
Alan Braslau wrote:
For "historic" reasons,
draw externalfigure "cow" scaled 5cm ;
normalizes the figure to a square. This will not be changed as it is a
very old feature of MetaFun.
The solution is
draw rawtextext("\externalfigure[cow]") xsized 5cm ;
where one can use xsized, ysized or xysized (taking a pair).
That works indeed. Thanks.
draw figure "" ...
-
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!
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Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On Sat, 7 Jul 2018 14:27:38 -0600
Alan Braslau wrote:
> For "historic" reasons,
> draw externalfigure "cow" scaled 5cm ;
> normalizes the figure to a square. This will not be changed as it is a
> very old feature of MetaFun.
>
> The solution is
> draw rawtextext("\externalfigure[cow]") xsized 5cm ;
> where one can use xsized, ysized or xysized (taking a pair).
That works indeed. Thanks.
Marco
___
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Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On Sat, 7 Jul 2018 22:27:51 +0200 Hans Hagen wrote: > On 7/7/2018 8:58 PM, Marco Patzer wrote: > > Hi! > > > > How to scale an image in MetaPost, maintaining the aspect ratio > > (without specifying the height explicitly)? > > > > Example: > > > > \setupexternalfigures [location=default] > > \starttext > >\externalfigure [cow][width=5cm] > > > >\startMPcode > > draw externalfigure "cow" scaled 5cm; > >\stopMPcode > > \stoptext > it's all in the metafun manual No doubts about that. It's more a matter of knowing what to search for. > xsized 5cm I tried it, same result - square image: draw externalfigure "cow" xsized 5cm; As Alan mentioned including the image with textext() works. Not as elegant, but it gets the job done. Marco ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On 7/7/2018 8:58 PM, Marco Patzer wrote: Hi! How to scale an image in MetaPost, maintaining the aspect ratio (without specifying the height explicitly)? Example: \setupexternalfigures [location=default] \starttext \externalfigure [cow][width=5cm] \startMPcode draw externalfigure "cow" scaled 5cm; \stopMPcode \stoptext it's all in the metafun manual xsized 5cm - 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 / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___
Re: [NTG-context] Scale image in MetaPost, maintaining aspect ratio
On Sat, 7 Jul 2018 20:58:40 +0200
Marco Patzer wrote:
> Hi!
>
> How to scale an image in MetaPost, maintaining the aspect ratio
> (without specifying the height explicitly)?
>
> Example:
>
> \setupexternalfigures [location=default]
> \starttext
> \externalfigure [cow][width=5cm]
>
> \startMPcode
> draw externalfigure "cow" scaled 5cm;
> \stopMPcode
> \stoptext
For "historic" reasons,
draw externalfigure "cow" scaled 5cm ;
normalizes the figure to a square. This will not be changed as it is a
very old feature of MetaFun.
The solution is
draw rawtextext("\externalfigure[cow]") xsized 5cm ;
where one can use xsized, ysized or xysized (taking a pair).
Alan
___
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Wiki!
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