logo: Add README for logo directory with format conversion advice.

This commit is contained in:
Tim Abbott
2021-04-14 08:38:48 -07:00
parent 0dac331c17
commit 940927910f

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Generally, we prefer to use SVG assets when possible.
However, many websites where you might want to use a Zulip logo do not
support SVG files. If you need a Zulip logo asset in a different
format (E.g. a 512px height PNG), you can generate that from one of
the `.svg` files in this directory.
On Linux, you can generate a PNG of a given height using the following:
```
rsvg-convert -h 512 static/images/logo/zulip-org-logo.svg -o /tmp/zulip-org-logo-512.png
```