From: Hans Hagen <j.hagen@xs4all.nl>
To: ntg-context@ntg.nl
Subject: Re: t-downsample.lua
Date: Sun, 17 Feb 2019 13:52:47 +0100 [thread overview]
Message-ID: <d524346e-26eb-1e5e-1d7a-ada4fc085b16@xs4all.nl> (raw)
In-Reply-To: <87k1hyvh69.fsf@a16n.net>
On 2/17/2019 11:32 AM, Peter Münster wrote:
> Hi,
>
> Please find attached a new version of the module, with some ideas
> from Marco. Later, I'll upload it to modules.contextgarden.net.
>
> Here a usage example:
>
> \usemodule[downsample]
> \setupexternalfigures[
> location=default, % find hacker.jpg and mill.png
> cache=/tmp, % where to put the low resolution images
> resolution=50, % resolution in DPI
> conversion=downsample.pdf] % use this module
> \starttext
> \externalfigure[hacker][width=0.4\textwidth]
> \setupexternalfigures[resolution=20]
> \externalfigure[mill][width=4in, height=3in]
> \setupexternalfigures[resolution=200]
> \externalfigure[mill][width=4in, height=3in]
> \stoptext
>
> Hans, it would be nice, to apply this patch, to trigger new conversion,
> when figure dimensions change:
>
> --- grph-inc.lua~ 2019-02-14 17:04:12.000000000 +0100
> +++ grph-inc.lua 2019-02-17 08:45:38.129971581 +0100
> @@ -864,6 +864,14 @@
> newbase = prefix .. newbase
> end
> local hash = ""
> + local width = figures.current().request.width
> + local height = figures.current().request.height
> + if width then
> + hash = hash .. "[w:" .. width .. "]"
> + end
> + if height then
> + hash = hash .. "[h:" .. height .. "]"
> + end
> if resolution then
> hash = hash .. "[r:" .. resolution .. "]"
> end
hm that needs a bit of thinking because here we have cases where we
downsample from say 600 to 150 dpi but then use that same one for all
kind of sizes (and then a different wd/ht should not trigger an extra
downsample)
Hans
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next prev parent reply other threads:[~2019-02-17 12:52 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-17 10:32 t-downsample.lua Peter Münster
2019-02-17 11:07 ` t-downsample.lua Peter Münster
2019-02-17 12:52 ` Hans Hagen [this message]
2019-02-24 10:55 ` t-downsample.lua Peter Münster
2019-02-26 8:09 ` t-downsample.lua Hans Hagen
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