Re: [NTG-context] Referring to multiple elements
2012-09-13 Andreas Mang m...@imt.uni-luebeck.de:
I do not know if there is a solution to this. The following would
work for your example:
\in{figure}[alpha]--\in[gamma]
Of course this is a quite rigid solution, that does not safeguard
against changes in figure order
That's what I am using at the moment. Apparently there is no such
functionality. This one would go on my wish list.
Marco
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[NTG-context] Wide descriptions protruding into the margin
Hi,
with wide description heads I have the problem that the following
description protrudes into the margin.
\definedescription
[description]
[alternative=hanging,
width=broad]
\starttext
\startdescription{conclusion that}
\input knuth
\stopdescription
\startdescription{conclusion that the designer of a new system must not only be
literally}
\input knuth
\stopdescription
\stoptext
In the second case the “Thus,” should be placed on the line after
the head. How do I achieve that? My current workaround is to append
a \hbox{ } to the problematic entries.
Marco
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Re: [NTG-context] MKII MKIV difference between \textrule
Am 14.09.2012 um 00:08 schrieb Alessandro Perucchi alessan...@perucchi.org:
Hello,
In my experimentation, I've found that in mkii and mkiv the behavior of
\textrule and \setuptextrule are different...
What I did was quite simple:
\textrule{Testing head}
blah blah blah
\textrule
in mkii the text in well centered between the lines.
But in mkiv the bottom line is too near the text, and I need to add something
like \blank[halfline] to have a similar behavior as mkii.
There is a vertical skip missing in the MkIV version of the macros.
pack-mrl.mkiv
\def\pack_textrule_following#1%
{\doifelsenothing{#1}
-{\nointerlineskip
+
{\vskip\dimexpr\strutdp+.5ex\ifdim\prevdepth\strutdp\else\ifdim\prevdepth\zeropoint-\prevdepth\fi\fi\relax
+ \nointerlineskip
\dontleavehmode\vbox
{\color[\directtextrulesparameter\c!rulecolor]
{\hrule\s!depth\directtextrulesparameter\c!rulethickness\s!height\zeropoint\s!width\availablehsize}}}
{\pack_textrule_with_text{#1}}%
\ifvmode
\prevdepth\zeropoint
\fi}
And apparently the command \starttextrule ... \stoptextrule doesn't work
(this was explain in the cont-entp.pdf page 204) in either mkii mliv.
This does work for me:
\starttext
blah blah blah
\starttextrule{Testing head}
blah blah blah
\stoptextrule
blah blah blah
\stoptext
Wolfgang
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Re: [NTG-context] Referring to multiple elements
Hi Marco,
The heart of what you need is a lua function that will take an array
of numbers, and return an array of consective-number runs, like so:
fignumarray = {1, 2, 3,5, 6,8, 10, 11, 12}
-- figruns = get_runs(fignumarray)
-- returns a table structured like so:
-- figruns[1].start = 1, figruns[1].stop = 3,
-- figruns[2].start = 5, figruns[2].stop = 6,
-- figruns[3].start = 8, figruns[3].stop = 8,
-- figruns[4].start = 10, figruns[4].stop = 12
I've written one below, plus the scaffolding required to feed it the
right input, and print its output to ConTeXt. Only two functions still
need writing --- one to turn the context argument [fig:f1, fig:f2,
fig:f4] into a lua array of strings, and one to turn each reference
string into a figure number. But this should get you on your way.
If you're not comfortable with programming LuaTeX, say so and I can
fill in the two missing functions sometime this weekend. But they
should be doable, really. (And, of course, you may be far more
experienced in LuaTeX than I, I don't know.)
Cheers,
Sietse
% should be below startluacode block, but clearer like so
\def\inwithranges[#1]%
{\ctxlua{u.inwithranges(#1)}}
\startluacode
u = userdata or { }
function get_runs(a)
runs = { }
run_start = 1
while run_start = #a do
run_stop = run_start
while a[run_stop + 1] == a[run_stop] + 1 do
run_stop = run_stop + 1
end
print(a[run_start] .. - .. a[run_stop])
table.insert(runs, {[start] = a[run_start],
[stop] = a[run_stop]})
run_start = run_stop + 1
end
return runs
end
function u.inwithranges(ref_string)
-- CTX... means I expect ConTeXt already has this function in a
library somewhere
local ref_array = CTXstring_to_array(refs_string) --FIXME
local ref_numbers = { }
for _, v in ipairs(ref_array) do
ref_numbers[i] = CTXref_to_fignumber(array) --FIXME
end
ref_numbers.sort()
runs = get_runs(ref_numbers)
for i, run in ipairs(runs) do
context.in( {run.start} )
context(-)
context.in( {run.stop} )
if i #runs then context(',') end
end
end
\stopluacode
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Re: [NTG-context] Wide descriptions protruding into the margin
Hi Marco,
···date: 2012-09-14, Friday···from: Marco Patzer···
\definedescription
[description]
[alternative=hanging,
width=broad]
... /
In the second case the “Thus,” should be placed on the line after
the head. How do I achieve that? My current workaround is to append
a \hbox{ } to the problematic entries.
you can hack the hanging alternative and substitute a glue for
the kern that is used for spacing (strc-con.mkvi):
···
\definedescription
[description]
[alternative=hanging,
width=broad]
\unprotect
\startsetups[\??constructionrenderings:\v!hanging]
% tricky: leftskipadaption is somewhat unpredictable
\let\\=\crlf
\noindent
\advance\leftskip-\leftskipadaption\relax
\ifdim\leftskipadaption=\zeropoint
\leftskipadaption1.5\emwidth\relax % just some default
\ifnum\c_strc_constructions_nested_state=\plusone
\ifdim\leftskip\zeropoint \relax
\leftskipadaption\leftskip
\fi
\fi
\fi
\ifnum\c_strc_constructions_nested_state\zerocount % was
\ifnum\c_strc_constructions_nested_state=\plusone
\advance\leftskip\leftskipadaption % but we're already further on
\fi
\hskip-\leftskipadaption\relax
\ifhbox\constructionheadbox\unhcopy\else\copy\fi\constructionheadbox
%% here’s the change: ·
% \kern\ifdim\constructionsheaddistance=\zeropoint
.75\emwidth\else\constructionsheaddistance\fi
\hskip\ifdim\constructionsheaddistance=\zeropoint
.75\emwidth\else\constructionsheaddistance\fi
\useconstructionstyleandcolor\c!style\c!color
\ignorespaces
\stopsetups
\protect
\starttext
\startdescription{conclusion that}
\input knuth
\stopdescription
\startdescription{conclusion that the designer of a new system must not only be
literally}
\input knuth
\stopdescription
\stoptext
···
But maybe this could be made an option?
Regards
Philipp
--
() ascii ribbon campaign - against html e-mail
/\ www.asciiribbon.org - against proprietary attachments
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Re: [NTG-context] Wide descriptions protruding into the margin
2012-09-14 Philipp Gesang ges...@stud.uni-heidelberg.de:
Hi Philipp,
you can hack the hanging alternative and substitute a glue for
the kern that is used for spacing (strc-con.mkvi):
[…]
This works perfectly. Thanks a lot for digging into the sources.
But maybe this could be made an option?
\dorecurse{10}{+1}
Marco
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Re: [NTG-context] Change color of EPS file.
Aditya Mahajan adit...@umich.edu wrote: If you want to use eps images, why not just use a white background at ConTeXt end (as you had stated in your first message I think you misread: Pol wants the EPS to be white-on-transparent, instead of black-on-transparent, so that he can use it on a (dark-)coloured background. That is exactly what I wanted. Pol stra wrote: But your answer gave me the idea to use imegemagick, so I found this trick: ... The result is good enough for me. Congratulations. Good luck with your work. Thank you Cheerio, Sietse ___ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] Change color of EPS file.
I tested this on a black-on-transparent EPS that was created via MetaPost, and it seems to work fine. If you are not using Linux (or Unix or Mac OS X), let me know and I can probably put together a quick HTML page to do this on my server. cat foo.eps | sed -e s/0 0 0 setrgbcolor/1 1 1 setrgbcolor/g bar.eps It simply translates the (0,0,0) triplet (which is black) to the (1,1,1) triplet (which is white). This is very simplistic and may not do all that you want. Troy Henderson ___ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
[NTG-context] Display math characters
Hello,
from the wiki
(http://wiki.contextgarden.net/Math/basic#List_of_All_Math_macros) I tryed the
following snippet:
\usemodule[fnt-25]
\showmathfontcharacters
But context complains that there is no fnt-25 module, so let’s grep
showmathfontcharacters in conteXt directory.
I found that it is defined into the mat-10 module. So new snippet:
\usemodule[mat-10]
\showmathfontcharacters
End new error:
ConTeXt ver: 2012.09.11 20:36 MKIV fmt: 2012.9.12 int: english/english
system cont-new.mkiv loaded
(/opt/context-minimals/texmf-context/tex/context/base/cont-new.mkiv
system beware: some patches loaded from cont-new.mkiv
)
fontslatin modern fonts are not preloaded
languageslanguage en is active
(mathsymbols.tex
resolversmodules loaded: 'mat-10'
(/opt/context-minimals/texmf-context/tex/context/base/s-mat-10.mkiv))
fontsdefining font with asked name 'unknown' is not found using
lookup 'file'
fontsdefining unknown font unknown, loading aborted
fontsdefining unable to define unknown as [thedefinedfont--0]
! LuaTeX error main ctx instance:22: attempt to index local 'resources' (a
nil value)
stack traceback:
main ctx instance:22: in function 'showmathfont'
main ctx instance:1: in main chunk.
system tex error on line 5 in file
/opt/context-minimals/texmf-context/tex/context/base/cont-yes.mkiv: LuaTeX
error ...
1 %D \module
2 %D [ file=cont-yes,
3 %Dversion=2012.06.01,
4 %D title=\CONTEXT\ Miscellaneous Macros,
5 %D subtitle=Startup Stub,
6 %D author=Hans Hagen,
7 %D date=\currentdate,
8 %D copyright={PRAGMA ADE \ \CONTEXT\ Development Team}]
9 %C
10 %C This module is part of the \CONTEXT\ macro||package and is
11 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12 %C details.
13
14 % At some point I will reconsider the \starttext .. \stoptext
15 % wraping as we can assume proper styling. It's a left-over from
argument ...cument.showmathfont(font.current())}
\firstoftwoarguments #1#2-#1
\doshowmathfontcharacters ...wmathfontcharacters }
\endgroup
to be read again
\finishjob
l.5 \finishjob
} context.finishjob()
...
l.86 \stopluacode
I do not realy care about this list, I was just currious and it did not work so
I point it out.
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Re: [NTG-context] ntg-context Digest, Vol 99, Issue 40
Troy Henderson said:
I tested this on a black-on-transparent EPS that was created via MetaPost, and
it seems to work fine. If you are not using Linux (or Unix or Mac OS X), let
me know and I can probably put together a quick HTML page to do this on my
server.
Thanks for the invitation. Fortunatly I’m using GNU/Linux.
cat foo.eps | sed -e s/0 0 0 setrgbcolor/1 1 1 setrgbcolor/g bar.eps
It simply translates the (0,0,0) triplet (which is black) to the (1,1,1)
triplet (which is white). This is very simplistic and may not do all that you
want.
Unfortunatly there is no such a sequence in my file:
grep setrgbcolor a1.EPS
/setcmykcolor{1 sub 4 1 roll 3{3 index add neg dup 0 lt{pop 0}if 3 1
roll}repeat setrgbcolor pop}wd
/sw/setlinewidth ld/scap/setlinecap ld/sj/setlinejoin ld/sm/setmiterlimit
ld/sd/setdash ld/rgb/setrgbcolor ld/crgb/currentrgbcolor ld/cmyk/setcmykcolor
ld/gs/gsave ld/gr/grestore ld
But thank you for gave a try.
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Re: [NTG-context] ntg-context Digest, Vol 99, Issue 40
Unfortunatly there is no such a sequence in my file:
grep setrgbcolor a1.EPS
/setcmykcolor{1 sub 4 1 roll 3{3 index add neg dup 0 lt{pop 0}if 3 1
roll}repeat setrgbcolor pop}wd
/sw/setlinewidth ld/scap/setlinecap ld/sj/setlinejoin ld/sm/setmiterlimit
ld/sd/setdash ld/rgb/setrgbcolor ld/crgb/currentrgbcolor
ld/cmyk/setcmykcolor ld/gs/gsave ld/gr/grestore ld
But thank you for gave a try.
I doubted that it would work, but thought that I would try just the same.
It may still be able to be done by converting it to SVG, editing
(automagically), and then converting back. If you are able, upload the EPS
to
http://www.tlhiv.org/upload/
and I will place around with it.
Troy
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Re: [NTG-context] Display math characters
Hi Pol,
You can use the following:
%% begin show-math.tex
\doifmode{mkiv}{\usemodule[s][mat-11]}
\starttext
\doifmodeelse{mkiv}{\showmathfontcharacters}{\showmathcharacters}
\stoptext
%% end show-math.tex
However in mkiv the presentation of math fonts is not the same as in mkii.
I don't know how to get the mkii presentation of the math fonts in mkiv…
Best regards: OK
On 14 sept. 2012, at 16:45, pol stra r...@hotmail.fr wrote:
Hello,
from the wiki
(http://wiki.contextgarden.net/Math/basic#List_of_All_Math_macros) I tryed
the following snippet:
\usemodule[fnt-25]
\showmathfontcharacters
But context complains that there is no fnt-25 module, so let’s grep
showmathfontcharacters in conteXt directory.
I found that it is defined into the mat-10 module. So new snippet:
\usemodule[mat-10]
\showmathfontcharacters
End new error:
ConTeXt ver: 2012.09.11 20:36 MKIV fmt: 2012.9.12 int: english/english
system cont-new.mkiv loaded
(/opt/context-minimals/texmf-context/tex/context/base/cont-new.mkiv
system beware: some patches loaded from cont-new.mkiv
)
fontslatin modern fonts are not preloaded
languageslanguage en is active
(mathsymbols.tex
resolversmodules loaded: 'mat-10'
(/opt/context-minimals/texmf-context/tex/context/base/s-mat-10.mkiv))
fontsdefining font with asked name 'unknown' is not found
using lookup 'file'
fontsdefining unknown font unknown, loading aborted
fontsdefining unable to define unknown as [thedefinedfont--0]
! LuaTeX error main ctx instance:22: attempt to index local 'resources' (a
nil value)
stack traceback:
main ctx instance:22: in function 'showmathfont'
main ctx instance:1: in main chunk.
system tex error on line 5 in file
/opt/context-minimals/texmf-context/tex/context/base/cont-yes.mkiv: LuaTeX
error ...
1 %D \module
2 %D [ file=cont-yes,
3 %Dversion=2012.06.01,
4 %D title=\CONTEXT\ Miscellaneous Macros,
5 %D subtitle=Startup Stub,
6 %D author=Hans Hagen,
7 %D date=\currentdate,
8 %D copyright={PRAGMA ADE \ \CONTEXT\ Development Team}]
9 %C
10 %C This module is part of the \CONTEXT\ macro||package and is
11 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12 %C details.
13
14 % At some point I will reconsider the \starttext .. \stoptext
15 % wraping as we can assume proper styling. It's a left-over from
argument ...cument.showmathfont(font.current())}
\firstoftwoarguments #1#2-#1
\doshowmathfontcharacters ...wmathfontcharacters }
\endgroup
to be read again
\finishjob
l.5 \finishjob
} context.finishjob()
...
l.86 \stopluacode
I do not realy care about this list, I was just currious and it did not work
so I point it out.
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Re: [NTG-context] MKII MKIV difference between \textrule
On 14 Sep 2012, at 13:26, Wolfgang Schuster wolfgang.schus...@gmail.com wrote:
Am 14.09.2012 um 00:08 schrieb Alessandro Perucchi alessan...@perucchi.org:
Hello,
In my experimentation, I've found that in mkii and mkiv the behavior of
\textrule and \setuptextrule are different...
What I did was quite simple:
\textrule{Testing head}
blah blah blah
\textrule
in mkii the text in well centered between the lines.
But in mkiv the bottom line is too near the text, and I need to add
something like \blank[halfline] to have a similar behavior as mkii.
There is a vertical skip missing in the MkIV version of the macros.
pack-mrl.mkiv
\def\pack_textrule_following#1%
{\doifelsenothing{#1}
-{\nointerlineskip
+
{\vskip\dimexpr\strutdp+.5ex\ifdim\prevdepth\strutdp\else\ifdim\prevdepth\zeropoint-\prevdepth\fi\fi\relax
+ \nointerlineskip
\dontleavehmode\vbox
{\color[\directtextrulesparameter\c!rulecolor]
{\hrule\s!depth\directtextrulesparameter\c!rulethickness\s!height\zeropoint\s!width\availablehsize}}}
{\pack_textrule_with_text{#1}}%
\ifvmode
\prevdepth\zeropoint
\fi}
I've tried to patch pack-mrl.mkiv and I still get the error of spacing before
the second \textrule.
My version of context is
mtx-context | ConTeXt Process Management 0.60
mtx-context |
mtx-context | main context file:
/Users/ptitvert/context/tex/texmf-context/tex/context/base/context.mkiv
mtx-context | current version: 2012.09.11 20:36
And apparently the command \starttextrule ... \stoptextrule doesn't work
(this was explain in the cont-entp.pdf page 204) in either mkii mliv.
This does work for me:
\starttext
blah blah blah
\starttextrule{Testing head}
blah blah blah
\stoptextrule
blah blah blah
\stoptext
But
\starttext
blah blah blah
\starttextrule[top]{Testing head}
blah blah blah
\stoptextrule
blah blah blah
\stoptext
doesn't, and this possibility is explain in the doc, but apparently it doesn't
work.
So either the doc is wrong, the command is wrong or I'm doing something wrong
:-D
Sincerely yours,
Alessandro
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Re: [NTG-context] Strange bug with reversed itemize
On Fri, 14 Sep 2012, Wolfgang Schuster wrote:
Am 14.09.2012 um 00:36 schrieb Aditya Mahajan adit...@umich.edu:
I have been able to isolate the bug to the update on 2012.07.09; specifically
to this commit.
http://repo.or.cz/w/context.git/blobdiff/6f124794f7dc253f8b83f2517c26ce17e50d66ff..refs/heads/origin:/tex/context/base/strc-num.mkiv
If I replace the current version of strc-num.mkiv with the version from
2012.07.09:
http://repo.or.cz/w/context.git/blob_plain/6f124794f7dc253f8b83f2517c26ce17e50d66ff:/tex/context/base/strc-num.mkiv
then the numbering is correct.
However, I cannot figure out what is causing the bug in that change.
Part of the problem is this code block:
\def\strc_counters_check_setup#1% does it have to happen here?
{% this can be done at the lua end / a bit messy here ... todo ...
\ifcsname\??counter#1\c!number\endcsname
\doifelsevalue {\??counter#1\c!number}{#1}
{\letbeundefined{\??counter#1\c!number}}%
{\doifvaluenothing{\??counter#1\c!number}
{\letbeundefined{\??counter#1\c!number}}}%
\fi
\ifcsname\??counter#1\c!number\endcsname
% it's a clone
\else
\edef\currentcounterlevel{\thenamedcounterlevel{#1}}%
\edef\p_start{\counterparameter{#1}\c!start}%
\ctxcommand{checkcountersetup(#1,\currentcounterlevel,\ifx\p_start\empty0\else\number\p_start\fi,\counterparameter{#1}\c!state)}%
\fi}
ConTeXt uses \p_start to store the current value of the start parameter.
When you set now a value for start in \setuppagenumber the value is kept
in \p_start (because there are no groups). When you start now the itemize
environment the same code is loaded and the start parameter (which hasn’t
been set yet) expands to a very stupid default value which is by another
helper function.
\def\strc_counter_setup_using_parameter#1#2% name \someparameter
{\edef\p_start{#2\c!start}%
\setupcounter
[#1]
[ \c!start=\ifx\p_start\empty0\else\number\p_start\fi,
...
\c!numbersegments=#2\c!numbersegments]}
As you can see here the start parameter expands to \p_start when it isn’t empty
what is the case here and because of this you get a wrong value for the item
numbers.
Thanks for the diagnosis. What will be a good way to fix this? I think
that
\expanded{\setupcounter[#1][\c!start=\ifx\p_start\empty0\else\number\p_start\fi.,...]}
should work (but I haven't tested it yet).
Aditya___
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Re: [NTG-context] MKII MKIV difference between \textrule
On Fri, Sep 14, 2012 at 11:50 PM, Alessandro Perucchi
alessan...@perucchi.org wrote:
On 14 Sep 2012, at 13:26, Wolfgang Schuster wolfgang.schus...@gmail.com
wrote:
Am 14.09.2012 um 00:08 schrieb Alessandro Perucchi
alessan...@perucchi.org:
Hello,
In my experimentation, I've found that in mkii and mkiv the behavior of
\textrule and \setuptextrule are different...
What I did was quite simple:
\textrule{Testing head}
blah blah blah
\textrule
in mkii the text in well centered between the lines.
But in mkiv the bottom line is too near the text, and I need to add
something like \blank[halfline] to have a similar behavior as mkii.
There is a vertical skip missing in the MkIV version of the macros.
pack-mrl.mkiv
\def\pack_textrule_following#1%
{\doifelsenothing{#1}
-{\nointerlineskip
+
{\vskip\dimexpr\strutdp+.5ex\ifdim\prevdepth\strutdp\else\ifdim\prevdepth\zeropoint-\prevdepth\fi\fi\relax
+ \nointerlineskip
\dontleavehmode\vbox
{\color[\directtextrulesparameter\c!rulecolor]
{\hrule\s!depth\directtextrulesparameter\c!rulethickness\s!height\zeropoint\s!width\availablehsize}}}
{\pack_textrule_with_text{#1}}%
\ifvmode
\prevdepth\zeropoint
\fi}
I've tried to patch pack-mrl.mkiv and I still get the error of spacing
before the second \textrule.
have you regenerated the format ?
--
luigi
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Re: [NTG-context] Change color of EPS file.
I put together this little utility for converting a color EPS/PDF/SVG to grayscale. http://www.tlhiv.org/grayscale/ Selecting invert swaps colors from white to black and black to white. So, using a black/white graphic on a transparent background should transform it to a white/black graphic on a transparent background. Testing is certainly necessary. Troy ___ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] ntg-context Digest, Vol 99, Issue 40
I put together this little utility for converting a color EPS/PDF/SVG to grayscale. http://www.tlhiv.org/grayscale/ Selecting invert swaps colors from white to black and black to white. So, using a black/white graphic on a transparent background should transform it to a white/black graphic on a transparent background. Testing is certainly necessary. Troy ___ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] Change color of EPS file.
On Fri, 14 Sep 2012, Troy Henderson wrote:
I put together this little utility for converting a color EPS/PDF/SVG to
grayscale.
http://www.tlhiv.org/grayscale/
Selecting invert swaps colors from white to black and black to white.
So, using a black/white graphic on a transparent background should
transform it to a white/black graphic on a transparent background.
Testing is certainly necessary.
Interesting. At some stage I might revive the webfilter branch of the
filler module so that such services can be accessed from within ConTeXt.
See the following post for details:
http://randomdeterminism.wordpress.com/2010/08/12/using-filters-outside-the-box/
In case anyone is interested, this blog post was talking about code
available at
https://raw.github.com/adityam/filter/web/t-filter.tex
https://raw.github.com/adityam/filter/web/t-filter.lua
At some stage I decided to delete these features from the filter module
and move it to a separate module. The code is available at
https://github.com/adityam/context-webfilter
but I haven't used it for about 2 years, and given all the changes in the
internal namespace, I doubt it will run without modifications.
Nonetheless, the idea is that a user can use such services using:
\definewebfilter[grayscaleimage]
[prefix={http://www.tlhiv.org/grayscale},
method=POST,
... some other options
]
and then use
\grayscaleimage{local-image.eps}
This will call the web-service and cache the result.
Aditya
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Re: [NTG-context] Change color of EPS file.
For those that care, here is basically how the service works. The filter is applied to an SVG, and the uploaded graphic is converted to SVG using the following process: EPS - PDF - SVG PDF - SVG SVG - PDF - SVG where the EPS - PDF conversion is done with the standard `epstopdf` included with TeX. The PDF - SVG conversion is done with `pdf2svg` which is available from http://www.cityinthesky.co.uk/opensource/pdf2svg and which uses Cairo and Poppler for its conversion. Now in order for my simplistic filter to function, all SVG's must essentially look alike (i.e., come from the same source). Therefore, uploaded SVG's are converted to PDF (using Inkscape) and then back to SVG (using `pdf2svg`). The filter then works with the resulting SVG and converts it back to the uploaded format using Inkscape. Troy ___ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] Change color of EPS file.
On Sat, Sep 15, 2012 at 1:23 AM, Troy Henderson thend...@gmail.com wrote: and which uses Cairo and Poppler for its conversion. Now in order for my simplistic filter to function, Why 'simplistic' and not 'simple' ? I always thought that its meaning is negative (something like 'simplistic' is a bad imitation of 'simple' ) -- luigi ___ 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://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
