Re: [NTG-context] degrade module
On Mon, Feb 18 2019, Alan Braslau wrote: > manipulating them on the fly as one changes layout or image placement > hardly seems efficient, Our use cases are perhaps different: in my case, manipulating them on the fly automatically is *very* efficient. > even if one were to be clever in storing copies and looking at time > stamps. ConTeXt does it already in grph-inc.lua, no need to be clever... ;) -- Peter ___ 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] degrade module
On Mon, 18 Feb 2019 23:50:24 +0100 Peter Münster wrote: > On Mon, Feb 18 2019, Alan Braslau wrote: > > > Incorrect, an image file contains width and height (in pixels) as well as a > > resolution, > > Optionally a resolution in the metadata. Then, of course, you have a > "natural size". But that doesn't matter, if you want other dimensions. For example, in Context \externalfigure [myfigure] should give this natural size. Of course, you can always specify other dimensions, in which case it gets scaled. Since what counts for our use in Context is usually fixing a particular size, i.e. [width=\textwidth], the "resolution", i.e. density in pixels is something that we want to control. So if we want to print to 300 dpi, for example, and we have a text width of 17cm, say, then we would like to have an image that is some 2000 pixels in width. One can normalize one's collection of images however one wishes, but manipulating them on the fly as one changes layout or image placement hardly seems efficient, even if one were to be clever in storing copies and looking at time stamps. A little bit of forethought might be better, and more predictable. 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] degrade module
On Mon, Feb 18 2019, Alan Braslau wrote: > Incorrect, an image file contains width and height (in pixels) as well as a > resolution, Optionally a resolution in the metadata. Then, of course, you have a "natural size". But that doesn't matter, if you want other dimensions. -- Peter ___ 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] degrade module
On Mon, 18 Feb 2019 22:09:32 +0100 Peter Münster wrote: > On Mon, Feb 18 2019, Alan Braslau wrote: > > > My working solution is to put figures in subdirectories by resolution, > > The purpose of the downsample module is something else: a well defined > resolution of the image in the PDF-file. A bitmap image does not have a > resolution, only a width and a height in pixels. The resolution gets > defined, when you specify the real dimensions. > Incorrect, an image file contains width and height (in pixels) as well as a resolution, and the combination gives real dimensions (for a natural size). A proper scan of a real object specifies all of this. 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] degrade module
On Mon, Feb 18 2019, Alan Braslau wrote: > My working solution is to put figures in subdirectories by resolution, The purpose of the downsample module is something else: a well defined resolution of the image in the PDF-file. A bitmap image does not have a resolution, only a width and a height in pixels. The resolution gets defined, when you specify the real dimensions. -- Peter ___ 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] degrade module
On Mon, 18 Feb 2019 10:13:20 +0100
Marco Patzer wrote:
> Yes. I didn't put much thought into it and assumed there is a better
> solution.
My working solution is to put figures in subdirectories by resolution,
that is externally, once and for all, using whatever is your favorite tool
to "degrade" pixel resolution to whatever value one desires, then setting
global macro (\FigRes) to this subdirectory name.
So, for example,
\def\FigRes{300/}
...
\externalfigure [\FigRes MyFigureName]
I do this as I have *very* high resolution images as my source
(also high resolution "depth", i.e. 16 bit) and it makes no sense
to include these as is in my documents.
It's very robust.
Alan
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Re: [NTG-context] degrade module
On Mon, Feb 18 2019, Marco Patzer wrote: > assumed there is a better solution. I guess, that Hans will tell us, if there is. And in the meantime, it can be distributed IMO. -- Peter ___ 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] degrade module
On Sun, 17 Feb 2019 12:14:14 +0100 Peter Münster wrote: > On Fri, Feb 15 2019, Marco Patzer wrote: > > > - It's 99% Peter's code, he's the maintainer of the module and > > probably he should just fix his code. > > Done. > > > > - My modification contains an ugly hack that just renames all files > > to pdf, regardless of the actual file type because I have no clue > > how to do that properly. > > I've included your hack, because I don't have any better idea... ok > > That code shouldn't make it into the distribution. > > Why not? Just because of the hack? Yes. I didn't put much thought into it and assumed there is a better solution. 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] degrade module
On Fri, Feb 15 2019, Marco Patzer wrote: > - It's 99% Peter's code, he's the maintainer of the module and > probably he should just fix his code. Done. > - My modification contains an ugly hack that just renames all files > to pdf, regardless of the actual file type because I have no clue > how to do that properly. I've included your hack, because I don't have any better idea... > That code shouldn't make it into the distribution. Why not? Just because of the hack? -- Peter ___ 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] degrade module
On Fri, 15 Feb 2019 11:48:51 +0100 Lutz Haseloff wrote: > Your Module with wrapper finally works for me as expected. Great to hear it's finally working. > Will it find its way into the distribution as an enhanced degrade > module? Probably not, for the following reasons: - It's 99% Peter's code, he's the maintainer of the module and probably he should just fix his code. - My modification contains an ugly hack that just renames all files to pdf, regardless of the actual file type because I have no clue how to do that properly. That code shouldn't make it into the distribution. - I'm not fluent in Lua and am therefore not the right person to maintain a Lua module. 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] degrade module
Thanks Marco, Your Module with wrapper finally works for me as expected. Thank you very much. Will it find its way into the distribution as an enhanced degrade module? Greetings ant thanks again Lutz Am 15. Februar 2019 11:08:45 MEZ schrieb Marco Patzer : >On Fri, 15 Feb 2019 10:22:48 +0100 >Lutz Haseloff wrote: > >> but both scripts trow the same error on windows and linux-armhf: >> >> grph-downsample.lua:32: bad argument #2 to 'format' (number has no >> integer representation) > >It works here on linux-armhf. No Lua error. Maybe the file got >mangled during transmission. > >I've uploaded a modified version to github, maybe try that one: > > https://github.com/mpfusion/context-downsample > >It includes a wrapper so you can call it like any other module >(\usemodule[downsample]). It's still Peter's code, but with small >modifications, so it degrades jpg as well as png images at the same >time. It's a quick hack, but works here, also on armhf. > >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] degrade module
On Fri, 15 Feb 2019 10:22:48 +0100 Lutz Haseloff wrote: > but both scripts trow the same error on windows and linux-armhf: > > grph-downsample.lua:32: bad argument #2 to 'format' (number has no > integer representation) It works here on linux-armhf. No Lua error. Maybe the file got mangled during transmission. I've uploaded a modified version to github, maybe try that one: https://github.com/mpfusion/context-downsample It includes a wrapper so you can call it like any other module (\usemodule[downsample]). It's still Peter's code, but with small modifications, so it degrades jpg as well as png images at the same time. It's a quick hack, but works here, also on armhf. 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] degrade module
Thank you Henning and Marco, but both scripts trow the same error on windows and linux-armhf: grph-downsample.lua:32: bad argument #2 to 'format' (number has no integer representation) Hans' luacode seem not to change the resolution of the pictures at all. It works, the size of the pictures get smaller but the resolution remains the same. Greetings Lutz Am 15. Februar 2019 08:25:35 MEZ schrieb Marco Patzer : >On Fri, 15 Feb 2019 07:56:31 +0100 >Lutz Haseloff wrote: > >> First i tried the grph-downsample.lua script. >> Unfortunately i get an error message >> grph-downsample.lua:31: bad argument #2 to 'format' (number has no >> integer representation) See attached log file. > >I remember that error. The script worked up to a particular context >version. I believe a Lua upgrade broke it. The version attached >should work. > >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] degrade module
On Fri, 15 Feb 2019 07:56:31 +0100
Lutz Haseloff wrote:
> First i tried the grph-downsample.lua script.
> Unfortunately i get an error message
> grph-downsample.lua:31: bad argument #2 to 'format' (number has no
> integer representation) See attached log file.
I remember that error. The script worked up to a particular context
version. I believe a Lua upgrade broke it. The version attached
should work.
Marco
if not modules then modules = { } end modules ['t-downsample'] = {
version = 1.001,
comment = "companion to grph-inc.mkiv",
author= "Peter Münster",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local format = string.format
-- figures.cachepaths.path = "cache" -- should be setup-option
local function sample_down(oldname, newname, resolution)
local request = figures.current().request
local width = request.width
local height = request.height
if resolution == "" or (not width and not height) then
print(format("Nothing to do: %s, %s, %s", oldname, newname, resolution))
return
end
local inch = 72.27
local image = img.scan{filename = oldname}
local xy = image.xsize / image.ysize
if not width then
width = height * xy / 65536
end
if not height then
height = width / xy / 65536
end
local xsize = resolution * width / inch
local ysize = resolution * height / inch
if xsize < image.xsize or ysize < image.ysize then
local s = format("gm convert -strip -resize %dx%d %s %s",
xsize, ysize, oldname, newname)
print("Conversion: " .. s)
os.execute(s)
else
print(format("Nothing to do: %s, %s, %s", oldname, newname, resolution))
print(format("xsize = %d, ysize = %d", xsize, ysize))
end
end
local formats = {"png", "jpg", "gif"}
for _, s in ipairs(formats) do
figures.converters[s] = figures.converters[s] or {}
figures.converters[s]["lowres." .. s] = sample_down
end
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Re: [NTG-context] degrade module
Am 2019-02-15 um 07:56 schrieb Lutz Haseloff : > Thank you all for your help. > > First i tried the grph-downsample.lua script. > Unfortunately i get an error message > grph-downsample.lua:31: bad argument #2 to 'format' (number has no integer > representation) > See attached log file. It’s a problem due to changes in Lua between 5.2 and 5.3 (or the like). The attached version works (for me). Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD grph-downsample.lua Description: Binary data ___ 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] degrade module
Thank you all for your help.
First i tried the grph-downsample.lua script.
Unfortunately i get an error message
grph-downsample.lua:31: bad argument #2 to 'format' (number has no integer
representation)
See attached log file.
Greetings Lutz
Am 14. Februar 2019 21:44:31 MEZ schrieb Hans Hagen :
>On 2/14/2019 9:32 PM, Peter Münster wrote:
>> On Thu, Feb 14 2019, Lutz Haseloff wrote:
>>
>>> I wanted to use the degrade module with recent ConTeXt and LuaTeX.
>>
>> Hi Lutz,
>>
>> Could you please check, if the module grph-downsample.lua could fit
>your
>> needs?
>>
>>
>>> The minimal example from the degrade manual gives an error.
>>> See the attached log.
>>> Is there any chance to get the module working again?
>>
>> There is always a chance. The question is just: who will afford the
>> efforts...
>> Please check first the downsample module, and then let's see, if you
>> still need this very old and hackish degrade module.
>you can plug in code
>
>\startluacode
>
>figures.converters["png"]["lowres.png"] =
>function(oldname,newname,resolution)
> os.execute(string.format('gm convert "%s" "%s"',oldname,newname))
>end
>
>figures.converters["jpg"]["lowres.jpg"] =
>function(oldname,newname,resolution)
> os.execute(string.format('gm convert "%s" "%s"',oldname,newname))
>end
>
>-- figures.suffixes["lowres.png"] = figures.suffixes.png -- suffix is
>automatically done
>
>\stopluacode
>\enabletrackers[graphics*]
>
>
>\starttext
> \externalfigure[t:/sources/mill.png][conversion=lowres.png]
> \externalfigure[t:/sources/hacker.jpg][conversion=lowres.jpg]
>\stoptext
>
>
>
>-
> 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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>http://www.ntg.nl/mailman/listinfo/ntg-context
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>wiki : http://contextgarden.net
>___
verkleinert-downsample.log
Description: Binary data
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Re: [NTG-context] degrade module
On Thu, Feb 14 2019, Wolfgang Schuster wrote: > Take a look at section 3.2 of the workflows [1] document. > > [1] http://www.pragma-ade.nl/general/manuals/workflows-mkiv.pdf Sorry, I don't understand. How will the "convert" command "convert -geometry %nx%x%ny% -compress JPEG ..." ever know, that the target height is 10cm? -- Peter ___ 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] degrade module
On 2/14/2019 9:32 PM, Peter Münster wrote:
On Thu, Feb 14 2019, Lutz Haseloff wrote:
I wanted to use the degrade module with recent ConTeXt and LuaTeX.
Hi Lutz,
Could you please check, if the module grph-downsample.lua could fit your
needs?
The minimal example from the degrade manual gives an error.
See the attached log.
Is there any chance to get the module working again?
There is always a chance. The question is just: who will afford the
efforts...
Please check first the downsample module, and then let's see, if you
still need this very old and hackish degrade module.
you can plug in code
\startluacode
figures.converters["png"]["lowres.png"] =
function(oldname,newname,resolution)
os.execute(string.format('gm convert "%s" "%s"',oldname,newname))
end
figures.converters["jpg"]["lowres.jpg"] =
function(oldname,newname,resolution)
os.execute(string.format('gm convert "%s" "%s"',oldname,newname))
end
-- figures.suffixes["lowres.png"] = figures.suffixes.png -- suffix is
automatically done
\stopluacode
\enabletrackers[graphics*]
\starttext
\externalfigure[t:/sources/mill.png][conversion=lowres.png]
\externalfigure[t:/sources/hacker.jpg][conversion=lowres.jpg]
\stoptext
-
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] degrade module
Peter Münster schrieb am 14.02.19 um 21:32: On Thu, Feb 14 2019, Lutz Haseloff wrote: I wanted to use the degrade module with recent ConTeXt and LuaTeX. Hi Lutz, Could you please check, if the module grph-downsample.lua could fit your needs? Take a look at section 3.2 of the workflows [1] document. [1] http://www.pragma-ade.nl/general/manuals/workflows-mkiv.pdf Wolfgang ___ 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] degrade module
On Thu, Feb 14 2019, Marco Patzer wrote: > Apparently it's not on the wiki It's here: https://modules.contextgarden.net/dl/grph-downsample.lua-1.001.zip -- Peter ___ 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] degrade module
On Thu, Feb 14 2019, Lutz Haseloff wrote: > I wanted to use the degrade module with recent ConTeXt and LuaTeX. Hi Lutz, Could you please check, if the module grph-downsample.lua could fit your needs? > The minimal example from the degrade manual gives an error. > See the attached log. > Is there any chance to get the module working again? There is always a chance. The question is just: who will afford the efforts... Please check first the downsample module, and then let's see, if you still need this very old and hackish degrade module. Cheers, -- Peter ___ 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] degrade module
On Thu, 14 Feb 2019 20:49:43 +0100 Lutz Haseloff wrote: > I wanted to use the degrade module with recent ConTeXt and LuaTeX. > The minimal example from the degrade manual gives an error. > See the attached log. > Is there any chance to get the module working again? I never used the degrade module. Instead I use the downsample.lua script which works fine with a current beta. Maybe give it a try. Apparently it's not on the wiki and if I remember correctly I got it off the mailing list. Let me know if you can't find it. 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 ___
