Last modified: 2014-10-19 14:56:38 UTC
The <img> tags generated by our math module do not list the width or height; this can delay page rendering while the image is loaded, or cause the page to reflow and jump around after the loading is complete: <img class="tex" alt="E_k \approx \frac{N (\Delta p)^2}{2m} \approx \frac{N \hbar^2 n^{2/3}}{2m} \approx \frac{M^{2/3} N^{5/3} \hbar^2}{2m R^2}." src="http://upload.wikimedia.org/math/b/7/e/b7e74c9f6c091d2c1e157e29381a5132.png" /> Note we probably need to change the math table so we actually record the size...
Specifying this will change the rendering behavior?
Kind of, the browser whilst reading the page source and loading it will know the dimensions and then reserve that area till the image loads (or fails depending on the browser).
On the MathTexvc's callTexvc(), run php's getimagesize() on the temp file result. (we need field 0 and field 1) Get connection to master, write values in new column(s) Read these values from slave in getMathImageHTML() http://php.net/manual/en/function.getimagesize.php
@TheDJ: Are you still woking on this? I wanted to clean up old bugzilla messages.
no, i'm not working on it, but i still think we should add it. generate file, use phpimagesize, store values in db, use them in generated html.
Change 129974 had a related patch set uploaded by TheDJ: Math: Retrieve dimensions of math images https://gerrit.wikimedia.org/r/129974
Done mostly as a proof of concept now
Change 144939 had a related patch set uploaded by Physikerwelt: Add width and height to SVG image https://gerrit.wikimedia.org/r/144939
Change 144939 merged by Frédéric Wang: Add width and height to SVG image https://gerrit.wikimedia.org/r/144939
(In reply to Gerrit Notification Bot from comment #9) > Change 144939 merged by Frédéric Wang: > Add width and height to SVG image > > https://gerrit.wikimedia.org/r/144939 This is really only for the SVG images. The PNG still need some width/height attributes, IIUC.
Change 129974 abandoned by Physikerwelt: Math: Retrieve dimensions of math images Reason: conserved in https://www.mediawiki.org/wiki/Extension:Math/Roadmap#Bugs_and_Roadmap_and_random_thoughts_.28From_the_discussion_page.29 feel free to restore if any development on that is planned https://gerrit.wikimedia.org/r/129974
