Hi Andrea,
Unfortunately, all the advantages of the WebP format regarding file size
are negated by slow and energy-consuming processing.
Only in exceptional cases where a slow internet connection < 500 kbit is
given (e.g. slow G3) this format makes sense.
The increased processing time correlates with increased energy consumption.
Measured with a commercial power meter on a local PC for one hour
(multiple times).
Stack: Windows10, Java11, Tomcat9, Chrome Browser, OpenLayers Client,
random WMS GetMap requests every 0.5 seconds
PNG 0.067 kWh vs. 0.071 kWh WebP vs. NoRequests 0.047 kWh.
This also applies to the JPEG format in a weakened way.
I will add this to the doc and readme files.
However, the WebP format could serve as an input format for the GWC and
then play out the advantages again. I would like to tackle this next.
Best regards,
Martin
Am 21.01.2023 um 13:38 schrieb Andrea Aime:
Hi Martin,
you don't need commit access, make a Pull Request instead:
https://github.com/geoserver/geoserver/pulls
For a community module, the review for the PR will be minimal,
basically just checking it's not breaking anything else.
Commit access will be proposed down the line, but basically no one
makes direct code changes, outside of emergency
situations: the write access is nowadays basically the same as a right
to review and merge a PR.
Cheers
Andrea
Il sab 21 gen 2023, 09:05 OpenDEM <cont...@opendemdata.info> ha scritto:
Hi Andrea,
I just signed the agreement.
Can you please give me write permissions?
Thanks,
Martin
Am 21.12.2022 um 10:49 schrieb Andrea Aime:
Hi,
the developer guide has some indication about what to do for a
community module:
https://docs.geoserver.org/latest/en/developer/policies/community-modules.html
If you want something more practical, see this PR, it's a simple
new community module being added:
https://github.com/geoserver/geoserver/commit/5576a457b30e1570a03be81f1b52239e2e9b6635
And oh, here is my +1 on adding the module, so you're out of the
initial red tape and can get on coding.
Cheers
Andrea
On Tue, Dec 20, 2022 at 8:16 PM OpenDEM
<cont...@opendemdata.info> wrote:
Hi Andrea,
Thanks for the quick answer.
Unfortunately, I don't think this meets the criteria.
Definitely this is not widespread.
I will have a look at the community modules.
Best regards,
Martin
Am 20.12.2022 um 18:10 schrieb Andrea Aime:
Hi,
thanks a lot for reaching out and contributing to the
GeoServer development. A WebP addition is quite interesting.
Can you elaborate a bit more of how the webp support is
provided? That IMHO is going to be a driver to decide where
to put the webp support.
We have a precedent for native code embedded in GeoServer:
both OSHI and the SQLite drivers rely on native code, and
they are part of core, but with a few good features:
* Widely used, normally rock solid (I haven't heard of
reports of GeoServer segfaulting due to bugs in the
native parts of those libraries)
* The native portion is embedded in the jars (no extra
installation needed) and covers a wide variety of
operating systems and architectures, making them
basically as cross platform as Java is
If the WebP libraries provide any reason to doubt either
stability, or are limited to a small number of platforms, or
require manual installations of native libraries, then I'd
start with a community module, which you can then graduate
to extension later down the road.
Cheers
Andrea
On Tue, Dec 20, 2022 at 4:27 PM OpenDEM
<cont...@opendemdata.info> wrote:
Hi, I'm Martin and I'm new to Geoserver.
I have written a class to support WebP as a new WMS
image output format. This works as expected and reduces
the file size by about one third compared to a JPEG.
Since an alpha channel is also supported, the reduction
compared to a PNG is about two thirds.
All modern browsers now support WebP, for older browsers
a fallback mechanism would have to be implemented on the
client side.
The implementation is based on com.github.nintha
webp-imageio-core which is not part of the GeoServer
Maven repository. What is the right way to include the
dependency?
Unfortunately not all platforms are supported as native
DLLs are used.
What is the right way to include the code in this case?
Would an extension be better then?
Best regards,
Martin
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