Firefox can't print transparent PNG image from Mapserver

[Delfos, Jacob]

Hi Ei,

I don't have a solution, but it might be helpful to know that this
problem has existed for quite a while in Mozilla (>2 years). It's
nothing to do with your particular setup or printers, I have had the
same issue here.
Perhaps you could merge the images into a single image? This is what I
do for my print layouts.

Regards,

Jacob

 

> -----Original Message-----
> From: UMN MapServer Users List 
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Ei Fujioka
> Sent: 3 May 2007 00:50
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: [UMN_MAPSERVER-USERS] Firefox can't print 
> transparent PNG image from Mapserver
> 
> Hi guys,
> 
> This may be a Firefox issue but want to know how you guys 
> deal with this 
> problem, if any, on your mapper application.
> 
> I got a weird problem that Firefox can't print a PNG image with
> transparent background which is retrieved from Mapserver.
> It's transparent on the browser, and so is it with [Print Preview].
> But when I print this, the PNG image covers the legend and background
> images (the transparent background turns to white).
> 
> To make things simple, I copied the PNG image in question along with
> legend and some background map images into a quite simple HTML.
> 
> http://seamap.env.duke.edu:8888/dev/mapservice/googlemaps/test.html
> 
> Here, the combination of points and lines is the PNG with transparent
> background. Should look OK on your browser.
> 
> Below is a screen shot of Firefox's [Print Preview].
> http://seamap.env.duke.edu:8888/dev/cache/misc/firefox_cant_pr
> int_png.jpg
> 
> Still has transparent background, but when printed, it doesn't.
> 
> 
> IE doesn't have this problem. It prints as seen on the browser.
> 
> Do you have any idea what's wrong?
> Is it just a Firefox bug? Any workaround? Should use GIF?
> # I thought Firefox provided great support for PNG...
> 
> <Excerpt from Mapfile>
> IMAGETYPE png
> OUTPUTFORMAT
>    NAME png
>    DRIVER "GD/PNG"
>    MIMETYPE "image/png"
>    IMAGEMODE PC256
>    EXTENSION "png"
> END
> 
> RESOLUTION 72
> TRANSPARENT ON
> 
> 
> <Mapserver version>
> MapServer version 4.2.2 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
> OUTPUT=PDF SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER
> SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT
> INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
> 
> <Environment>
> ver 1.5.0.11 on Windows 2000
> ver 1.5.0.11 on Windows Xp
> A color printer and a B/W printer
> 
> Thanks,
> 
> Ei
> 
> -- 
> ======================
>    Ei Fujioka
>    Research Associate
>    Duke University
> 
>    (919) 613-8021
>    efujioka at duke.edu
> ======================
> 

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