[mapserver-users] Black background with palette

[Alexandre Dube]

Stephen,

  The MAP imagecolor isn't black and to put it at first position in my 
palette file but that didn't help.

Thanks for your help,

Alexandre


Stephen Woodbridge wrote:
> Another thought on this is the because you are asking for a 
> transparent image, the IMAGECOLOR tag is usually transparent and I 
> have seen that come up as black in some cases.
>
> -Steve W
>
> Stephen Woodbridge wrote:
>> Alexandre,
>>
>> Do you have IMAGECOLOR "#000000" set at the MAP level? Also I would 
>> put the background color as the first color in the mypalette.txt file 
>> and see if that helps.
>>
>> -Steve W
>>
>> Alexandre Dube wrote:
>>> Hi,
>>>
>>> == problem ==
>>>
>>>  I'm pretty sure I saw this problem on the list somewhere, but I 
>>> couldn't find the actual thread so here it is : while using
>>> agg & palette option, when there's no data to draw, instead of 
>>> having the backgroundcolor drawn it's all black instead.
>>>  How can I go around this problem ?
>>>
>>>
>>> == my actual need ==
>>>
>>>  I want to produce smaller images.  Currently, my getMap renders a 
>>> 66K png image.  With the palette, it's down to 17K but with a black 
>>> background.
>>>
>>>
>>> == ouputformat definition ==
>>>
>>>    OUTPUTFORMAT
>>>                NAME aggpng24
>>>                DRIVER AGG/PNG
>>>                MIMETYPE "image/png"
>>>                IMAGEMODE RGB
>>>                EXTENSION "png"
>>>                FORMATOPTION "INTERLACE=OFF"
>>>                FORMATOPTION "PALETTE_FORCE=ON"
>>>                FORMATOPTION "PALETTE=/my/path/mypalette.txt"
>>>                TRANSPARENT ON
>>>                FORMATOPTION "TRANSPARENT=ON"
>>>    END
>>>
>>>
>>
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>


-- 
Alexandre Dubé
Mapgears
www.mapgears.com