Yes.
Plus, once the server does the conversion, the result of that conversion
can be, at least, cached on the sim, if not stored persistently on the
asset server; so what I'm planning to do here already goes into the
direction of having several image types, more or less persistently, on
the server side.
On 12/8/2010 9:04 AM, Melanie wrote:
The conversion to jp2 is done by the linden viewer. The asset server
could store any format, it's just a byte stream to us.
Melanie
Toni Alatalo wrote:
On Dec 8, 2010, at 5:36 PM, Diva Canto wrote:
So far, all textures in OpenSim are stored and served as jp2. However, some
viewers can't use jp2. Example: Unity3d, for the time being. I would like to
improve the GetTexture cap service by adding the ability for it to make
conversions on the fly depending on extra data provided by the caller.
What about uploading?
Ogre using viewers like realXtend apps are also happy with many texture
formats, notable DDS which is most lightweight to load 'cause GPUs can decode
them on their own. JP2 decoding with open source libs is very heavy, especially
on small mobile devices. We've been using PNG as well.
One problem IIRC we've had with Opensim is that it converts all the textures to
jp2 upon upload.
Is not much a problem for us anymore, as we are increasingly using normal web
servers to host all assets.
But it is insane to convert a png to a jp2 upon upload, and then convert it to
png again upon download, so figured to point this out. Given I recall right and
this was indeed on the server side, and not in the viewers.
Of the actual question, I don't know my preference yet -- usually the easy& safe
way is to think that using standards like HTTP normally is good :) .. but haven't used
those accept&content-type headers in own code so don't really know.
~Toni
There are two ways of doing this. Which one do people prefer?
A) Add an extra query parameter:
http://foo.com/GetTexture/?texture_id=<uuid>&format=<format>
B) Use the Accept and Content-Type headers appropriately.
The request might have
Accept: image/png, image/jp2
And the response might have
Content-Type: image/png
Diva / Crista
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