mapserver support for sld-opacity fills

[lars lingner]

Steve Lime wrote:
> 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. 
>
>   

Thank you for your reply. I'll monitor the list the next couple of weeks 
and report to this list/you if I see some movement on this topic.

Have a nice day!

lars


>>>> 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
>>>>
>>>>         
>>>       
>
>