mapserver support for sld-opacity fills

[Steve Lime]

I am waiting to see how the AGG work goes and then see where we are at w/respect
to timing. That needs to be a priority and I didn't want style-level opacity to hinder it.
Ideally I'd like to have layer-level opacity inform style-level opacity for vector data. We
should know more in the next week or two.

Technically it shouldn't be that bad. It's just setting an alpha value, and turning on blending.
Gets tricky with something like a pixmap symbol that has it's own alpha channel. 

Steve 

>>> On 3/21/2007 at 12:23 PM, in message <46016A28.6030209 at gmx.net>, lars lingner
<lingner.mail at GMX.NET> wrote:
> Yewondwossen Assefa wrote:
>> Hi There,
>> 
>>  Tranparency is currently supported only at layer level as opposed to 
>> class/style level. This is one of the features that could make it for 
>> the 5.0 release 
>> (http://mapserver.gis.umn.edu/development/release_plans/mapserver_5_0/)
>> We could then upgrade the sld to support read/write of the opacity 
>> parameter.
>> 
>> Best Regards
> 
> Thank you for this info. Good to know that this topic is on the table. 
> Is there a chance to estimate the effort to get SLD opacity support in MS?
> I really don`t want to put pressure on anybody, but I have to estimate 
> how the chances are whether this feature will be available in the next 3 
> month, 12 month or even later.
> 
> Based on this answer I'll have to schedule some tasks and think about 
> how can I help to get this feature work.
> 
> lars
> 
>> 
>> lars lingner wrote:
>>> Hello list,
>>>
>>> as I saw on the Mapserver SLD Howto 
>>> (http://mapserver.gis.umn.edu/docs/howto/sldhowto/) there is no 
>>> support for opacity by mapserver.
>>>
>>> How is the planning to implement support for opacity? Is there a plan 
>>> to support this? I searched the mapserver-users and -dev mailing 
>>> lists, but I couldn't find any infos to this topic.
>>>
>>> What is the reason for no support? Is it because nobody tried it or is 
>>> it too time consuming and has therefore an low priority? Or is it 
>>> difficult to implement or even impossible at the current stage of 
>>> mapserver code?
>>> Are there any unreachable limits like library dependencies or 
>>> necessary architecture changes?
>>>
>>> The thing is, I could really use this feature and now I'm thinking 
>>> about how I could get it.
>>> If its a strait forward programming task I will check if I could do 
>>> it. Therefore it would be nice to know the estimated time for 
>>> implementation.
>>>
>>> I'll appreciate any replies. If there was already an discussion about 
>>> this, then point me to it please.
>>>
>>> Thanks in advance
>>>
>>>
>>> lars
>>>
>> 
>>