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Posted on 27/08/2009 15:16:31

 

When using /Admin/Public/GetImage.aspx to resize a PNG image. How do I preserve the transparency of the image?

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Posted on 31/08/2009 10:00:59
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thl@dk.columbusit.com wrote:

 

When using /Admin/Public/GetImage.aspx to resize a PNG image. How do I preserve the transparency of the image?


 

This is not a supported feature. The same applies to GIF images.

 

 - Lasse

 
Posted on 01/09/2009 09:20:32
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It's just been confirmed that it will be in the next release:)

 
Posted on 19/04/2010 13:19:41
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Hi Sorenson,

Was this feature included? I am running the latest relaese and after using the getimage.aspx the file is blank. Check it out:

http://www.mydeltaq.com/admin/public/getimage.aspx?Image=/Files/Billeder/AdegaMayor/produtos/oito-2-garrafas.png&Format=png&Width=140

nuno
 
Nicolai Høeg Pedersen
Posted on 19/04/2010 13:38:10
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Well yes and no.

If your original png file contains an alpha channel that describes how the transparancy should look like - then yes, it should work.

Otherwise no - its not possible.

http://www.google.dk/#hl=da&source=hp&q=png+transparency+alpha&meta=&aq=f&aqi=&aql=&oq=&gs_rfai=&fp=a9ac24608f20d0b1
 

 
Posted on 19/11/2010 18:17:57
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To what extend is this supported? This doesn't seem to work:

http://dev.nl.sapph.mediaweb.nl/admin/public/getimage.aspx?Image=/files/billeder/productimages/1014-117-10-2-white.png&Width=182&Height=800

While this one does:

http://dev.nl.sapph.mediaweb.nl/getimage.aspx?Image=/files/billeder/productimages/1014-117-10-2-white.png&Width=182&Height=800

The second example is a custom GetImage with code based on this article: http://getlara.com/north-america/canada/alberta/edmonton/post/2008/10/13/png-jpg-gif-image-resize-with-net-with-transparency

So, it seems that the image supports transparency, but DW doesn't maintain it?

Imar
 
Posted on 19/11/2010 22:04:58
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Hi Imar,
 
Nice girl you have there :)
 
I guess you need the following settings to preserve transparency...
 
Format (required - defaults to JPG without transparency)
- PNG (always choose this - also when source is GIF)
 
Crop offset (required - only two options are available)
- Keep aspect ratio
- Fit image
 
Now, take a look at this beauty...
 
 
Is that the result you were looking for?
 
 
/Morten


 
 
Posted on 20/11/2010 11:09:17
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Hi Morten,

Thanks a lot; that was indeed the result I was after. I played around with the Format (and tried PNG) but that didn't seem to help. The trick was to indeed to use Format=5 which preserves the transparency (and resizes, rather than crops which is exactly what we need).

Thank you and enjoy your weekend.

Imar

 

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