Subject: Re: [xsl] Image size with XSL? From: "Mark Wilson mark@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Sun, 18 Dec 2016 20:15:07 -0000 |
On Sun, Dec 18, 2016 at 07:54:10PM -0000, Mark Wilson mark@xxxxxxxxxxxx scripsit: [snip]I would like to add the placement-index to the XML data source programmatically. Is there a way to obtain the height or width of a jpeg image from the file itself (image.jpg, for instance) using XSLT? Or, can someone suggest another way to do this programmatically?You can't do that directly with XSLT. (Well... Turing-complete programming language. You can't do that easily and absent considerable suffering with XSLT.) The usual way is to use something like http://www.graphicsmagick.org/ and a scripting language to extract the information you want and to stick it in meta-data XML files associated with the image. (So you'd have image.jpg and image_meta.xml.) Then XSLT can read the image_meta.xml file to get the necessary information.
This has problems because when you have lots of little files file-IO tends to dominate your run time, but it's also hard to avoid, and at least this way you have the prospect of stuffing all the imagine meta into a single collection at the start.
-- Graydon
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