Hi Danilo,
that sounds great!
Just a word of warning, normally you should do the proposal first (maybe do
a tiny prototype
to figure out where you want to make the changes, it's up to you), and then
the coding.
If you do the opposite, it's fine too, but don't complain if/when you get
change request on your
proposal that will force you to rewrite part of the code ;-)
Cheers
Andrea
On Wed, Aug 23, 2017 at 3:51 PM, Danilo da Silveira Figueira <
[email protected]> wrote:
> Andrea,
>
> Thanks for your reply, so i will propose this API change and code this by
> myself. After it i do the proposal for the developer team.
>
>
>
> 2017-08-23 5:16 GMT-03:00 Andrea Aime <[email protected]>:
>
>> Hi Danilo,
>> as far as I know there is no support for alpha channel in there.
>>
>> You'll have to make a code extension in GeoTools, which might not be
>> simple since the current API,
>> derived from the SLD spec, goes like this:
>>
>> /**
>> * Set the RGB channels to be used
>> *
>> * @param red the red channel
>> * @param green the green channel
>> * @param blue the blue channel
>> */
>> void setRGBChannels(SelectedChannelType red, SelectedChannelType
>> green, SelectedChannelType blue);
>>
>> /**
>> * Set the RGB channels to be used
>> *
>> * @param channels array of channels in RGB order
>> */
>> void setRGBChannels(SelectedChannelType[] channels);
>>
>> and all the code dealing with style parsing, encoding and rendering has
>> enumerations or explicit mentions
>> of "red", "green" and "blue".
>> So public API breaking seems to be necessary, which implies that you'll
>> have to make a proposal and restrict
>> the code changes to the developer series:
>> http://docs.geotools.org/latest/developer/procedures/proposal.html
>>
>> Hope this helps (even if it's probably not what you wanted to hear :-p )
>>
>> Cheers
>> Andrea
>>
>>
>> On Tue, Aug 22, 2017 at 8:41 PM, Danilo da Silveira Figueira <
>> [email protected]> wrote:
>>
>>> Hi all,
>>>
>>> I see that the property ChannelSelection has only RGB channels, i need
>>> to use all the RGBA channels.
>>>
>>> In fact in my image the AlphaChannel is an important information too.
>>> And each cell has one different value, so because this i cant use things
>>> like RAMP/VALUE colormap.
>>>
>>> It is possible to use something like <AlphaCHannel> in sld? If don't,
>>> can i do this by implementing a geoserver extension?
>>>
>>> i will have to
>>> How can i do this?
>>>
>>> ------------------------------------------------------------
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>>>
>>
>>
>> --
>>
>> Regards,
>>
>> Andrea Aime
>>
>> ==
>> GeoServer Professional Services from the experts! Visit
>> http://goo.gl/it488V for more information.
>> ==
>>
>> Ing. Andrea Aime
>> @geowolf
>> Technical Lead
>>
>> GeoSolutions S.A.S.
>> Via di Montramito 3/A
>> 55054 Massarosa (LU)
>> phone: +39 0584 962313 <+39%200584%20962313>
>> fax: +39 0584 1660272 <+39%200584%20166%200272>
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>>
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>>
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--
Regards,
Andrea Aime
==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.
==
Ing. Andrea Aime
@geowolf
Technical Lead
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o
nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il
loro utilizzo è consentito esclusivamente al destinatario del messaggio,
per le finalità indicate nel messaggio stesso. Qualora riceviate questo
messaggio senza esserne il destinatario, Vi preghiamo cortesemente di
darcene notizia via e-mail e di procedere alla distruzione del messaggio
stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso,
divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od
utilizzarlo per finalità diverse, costituisce comportamento contrario ai
principi dettati dal D.Lgs. 196/2003.
The information in this message and/or attachments, is intended solely for
the attention and use of the named addressee(s) and may be confidential or
proprietary in nature or covered by the provisions of privacy act
(Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection
Code).Any use not in accord with its purpose, any disclosure, reproduction,
copying, distribution, or either dissemination, either whole or partial, is
strictly forbidden except previous formal approval of the named
addressee(s). If you are not the intended recipient, please contact
immediately the sender by telephone, fax or e-mail and delete the
information in this message that has been received in error. The sender
does not give any warranty or accept liability as the content, accuracy or
completeness of sent messages and accepts no responsibility for changes
made after they were sent or for other risks which arise as a result of
e-mail transmission, viruses, etc.
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