Firefox can't print transparent PNG image from Mapserver

[Delfos, Jacob]

Yes, I actually used PNG24, not PNG8
I have some bad news about GIF... The problem seems to exist there as
well. I just ran a test putting a transparent GIF over some text. It
works in IE, but not in Firefox (PDF comes out blank, because the
transparent GIF hides the text).

Looks like you will have to try a different approach...

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 22:13
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] Firefox can't print 
> transparent PNG image from Mapserver
> 
> Thank you very much, Delfos.
> 
> It's good to know I did do nothing wrong.
> Probably, I need to use GIF instead because the background map is 
> actually Google Maps.
> By the way, did you try PNG24 as well? The same results?
> 
> Thanks,
> 
> 
> Delfos, Jacob wrote:
> > 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
> >> ======================
> >>
> > 
> > This email and any attachments are intended solely for the 
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> 
> -- 
> ======================
>    Ei Fujioka
>    Research Associate
>    Duke University
> 
>    (919) 613-8021
>    efujioka at duke.edu
> ======================
> 

This email and any attachments are intended solely for the named recipient and are confidential. The copying or distribution of them or any information they contain by anyone other than the named recipient is prohibited. If you have received this document in error, please notify the sender and delete all copies from your computer system and destroy all hard copies. It is the recipient's responsibility to check this email and any attachments to this email for viruses before use.