pixmap symbols - AGG does not seem to support the TRANSPARENT keyword in SYMBOL

[havatv]

AGG (png) does not seem to support the TRANSPARENT parameter of the SYMBOL element.

GD (gif) seems to support it.

This is the symbol that I used (the image is from the Mapserver documentation).

   SYMBOL
     NAME "in_the_star"
     TYPE PIXMAP
     IMAGE "images/star-symbol.png" # size 20x20
     TRANSPARENT 8 # does not work for AGG, works for GD!
   END

[havatv]

I can confirm that this bug is still present in 6.0.0. I will attach some files that show the results for mapserver 5 (5.6.6) and mapserver 6 (6.0.0).

Here is a complete map file that can be used to reproduce the bug:

MAP
  SIZE 100 100
  EXTENT 0 0 100 100
  UNITS meters
  IMAGECOLOR 255 255 0
  IMAGETYPE png
  #IMAGETYPE gif

  SYMBOL
    NAME "in_the_star"
    TYPE PIXMAP
    IMAGE "images/star-symbol.png" # size 20x20
    TRANSPARENT 8 # does not work!
  END

  LAYER
    NAME "test"
    SIZEUNITS pixels
    STATUS DEFAULT
    TYPE POINT
    FEATURE
      POINTS
        50 50
      END
    END
    CLASS #
      NAME 'Star'
      STYLE # ------ pixmap ------
        SYMBOL 'in_the_star'
        #SIZE 10
      END # style
    END # class
  END # layer
END # Map file

star-symbol.png is in the documentation "tree", but I attach it anyway.

[havatv]

6.0.0 rendering (agg, png) - note the lack of transparency

[havatv]

6.0.0 - gif (GD) version - OK

[havatv]

5.6.6 png (agg) version - OK

[havatv]

5.6.6 gif (gd) version - OK

[tbonfort]

Steve, do we really want to support this feature?

[sdlime]

Hmmm... We've been trending to setting transparency through image and not the symbol for years. I'd say no and would like to see the keyword in symbols depricated. How big a fix is it? Could fix in 6.0 and mark as depricated and then remove in 6.2...

Steve