Am 01.09.22 um 10:51 schrieb Henning Hraban Ramm via ntg-context:

Am 01.09.22 um 10:44 schrieb juh+ntg-context--- via ntg-context:

...

Hi,

what is resolution meant to do?

...

What am I missing?

The resolution parameter is still not used by default ConTeXt, sorry.

But you can use it with the attached lua file like:

This works also: \startluacode local function downsampler(oldname, newname, resolution) if not resolution or resolution == "" then resolution = 72 end local cmd = string.format( [[gm convert -resample %ix%i %s %s]], resolution, resolution, oldname, newname) os.execute(cmd) end -- Set the PDF and default JPEG converters to the above function. figures.converters.jpg.pdf = downsampler figures.converters.jpg.default = downsampler \stopluacode I didn’t manage to plug this into the "conversion" mechanism. Hraban

Am 01.09.22 um 12:37 schrieb juh+ntg-context--- via ntg-context:

Hi Hraban,

Am 01.09.22 um 10:56 schrieb Henning Hraban Ramm via ntg-context:

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\startluacode local function downsampler(oldname, newname, resolution)      if not resolution or resolution == "" then          resolution = 72      end      local cmd = string.format(        [[gm convert -resample %ix%i %s %s]],        resolution, resolution, oldname, newname)      os.execute(cmd) end

-- Set the PDF and default JPEG converters to the above function. figures.converters.jpg.pdf = downsampler figures.converters.jpg.default = downsampler \stopluacode

I didn’t manage to plug this into the "conversion" mechanism.

Thanks a lot. With this I get 5.9MB instead of 13MB.

Maybe I can skip postprocessing the pdf file with ps2pdf.

From an error message I guess that this script also tries to downsample png files. Is that correct?

According to the sources it should only attack JPEGs. Hraban

Am 01.09.22 um 13:43 schrieb juh+ntg-context--- via ntg-context:

Am 01.09.22 um 10:51 schrieb Henning Hraban Ramm via ntg-context:

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\loadluafile[grph-downsample] \doifmodeelse{print}{%      \def\Resolution{300} }{%      \def\Resolution{96} }%

\setupexternalfigures[    %directory={./Logos,img},    conversion=lowres.jpg,    resolution=\Resolution, ]

With the script I get strange results. I am not sure whether the resolution is correctly calculated.

And I am wondering what the script is doing with png files.

This one attacks all images, but it doesn’t calculate the final size correctly. Hraban

Thanks for this code Hraban. I tried this last night and it worked really well. I did have one stumbling block when I noticed that those image files with a space in their names were not found, however renaming without a space solved the problem. Is this a bug or a feature? Thanks Keith McKay On Thu, 1 Sep 2022, 09:52 Henning Hraban Ramm via ntg-context, < ntg-context@ntg.nl> wrote:

Am 01.09.22 um 10:44 schrieb juh+ntg-context--- via ntg-context:

...

Hi,

what is resolution meant to do?

Whatever I insert as resolution, I get no change.

\setupexternalfigure[location={default,local},resolution=30] \starttext \externalfigure[hacker] \stoptext

What am I missing?

The resolution parameter is still not used by default ConTeXt, sorry.

But you can use it with the attached lua file like:

\loadluafile[grph-downsample] \doifmodeelse{print}{% \def\Resolution{300} }{% \def\Resolution{96} }%

\setupexternalfigures[ %directory={./Logos,img}, conversion=lowres.jpg, resolution=\Resolution, ]

Hraban

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