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From: greg <gregor.ebbing@gmx.de>
Newsgroups: comp.lang.tcl
Subject: Re: is there an image package that doesn't require Tk ?
Date: Sat, 29 Jun 2024 09:35:26 +0200
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Am 29.06.24 um 00:07 schrieb Andreas Leitgeb:
> Andreas Leitgeb <avl@logic.at> wrote:
>> I'd like it to open a .png file (screenshot from an android
>> phone) extract five rectangular regions from it, and convert
>> them to something similar to Tk's [$image data] - e.g. a list
>> of lists of colors
> 
> Thanks to all who answered...
> 
> Unfortunately, I haven't yet succeeded with any of the suggestions.
> 
> That's where I got stuck with each:
> 
> Gerald Lester:
> http://www.graphicsmagick.org/TclMagick/doc/TclMagick.html
> Ted Nolan:
> https://wiki.tcl-lang.org/page/TclMagick
> 
> I got it to configure it
>    (--with-magick=/usr/lib/x86_64-linux-gnu/ImageMagick-6.9.11/bin-q16/MagickWand-config)
> compile and install "apparently" successfully, but "package require TclMagick"
> spews out:
>    couldn't load file "/usr/local/lib/TclMagick0.45/libTclMagick.so":
>    /usr/local/lib/TclMagick0.45/libTclMagick.so: undefined symbol:
>    tclStubsPtr
> 
> 
> Harald Oehlmann:
> https://core.tcl-lang.org/akupries/crimp/home
> 
> I eventually got  critcl (from Ubuntu apt) and kettle (from fossil)
> installed.  If I try to install crimp, it fails at:
>   install-doc-markdown: no files matched glob pattern "*"
>      while executing
>      "glob -directory $src *"
> I only find the keyword "install-doc-markdown" in kettle's source
> tree, but don't grok it how to just skip that part.  Unfortunately,
> the docs are the first thing installed, so as it fails there, nothing
> else gets installed.
> 
> 
> greg:
> https://wiki.tcl-lang.org/page/Pixane
> 
> Thanks for suggesting, but without source - I'll rather not use it.
> 
> greg:
> https://github.com/ray2501/tcl-stbimage
> 
> Seems more targetted towards converting images between formats
> and resizing.  According to the web page it doesn't seem like
> supporting extracting rectangular regions from a bigger image
> or any simple access to pixels or rectangles of pixels.
> 
> 
> Paul Obermeier:
> https://github.com/flightaware/tcl.gd
> 
> Extracting rectangles seems covered by "copy", but I didn't
> see (in the docs) any sub command to extract an image's data
> as "list of list of color" - I could query single pixels,
> and I could get it in binary gd/gd2 format, but not sure what
> that is...
> 



Debian Linux couldn't get it to work with imagemagick.
wand-config not found

I switched to graphicsmagick.
(This also removes imagemagick)
#tcl-dev and tk-dev are already installed
apt install graphicsmagick-imagemagick-compat
apt install graphicsmagick-libmagick-dev-compat

Downloaded the graphicsmagick source and created the TclMagick 
subdirectory from it

make
../configure
make install

(/usr/lib/TclMagick0.46)


#a example
#http://www.neatware.com/myrmecox/studio/ex_tclmagick.html