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
TIA,
--
Peter
t-downsample.lua
Description: Binary data
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