Transparent PNG Images are All Black

[novw]

this is weird. Yesterday I downloaded some PNG's from the net. They showed fine in irfanview. Later yesterday I was forced to update adobe's reader and flashplayer, and now the PNG's from yesterday are black?!

When I open a jpg and save the picture as PNG, the resulting PNG is visible. Huh ?!

[Bhikkhu Pesala]

Not enough information to go on. As you can see, their logo image is in colour, and is a GIF, not a PNG image. If I save it as a PNG, it is still in colour.

[novw]

http://www.geocaching.com/about/logousage.aspx logos are PNG. Maybe this board converted them to gif? It is strange, because the first time I downloaded them first time, they worked.

I just re-downloaded the original png's from the link above, and they are black (invissible) when viewing with irfanview, and black and white (visible) when viewing with windows-viewer.


(updating irfanview from 4.25 to 4.27 did not fix the problem)

[Bhikkhu Pesala]

The logo in the page header is GIF. The logos at the bottom of the page are PNG with transparency.

IrfanView doesn't display transparency with a grid like other apps — it uses the background viewing colour, which by default is black. So, change the colour in Properties, Viewing to white or cyan or whatever, and you can see the images.

[novw]

ok. So I go to properties, viewing and change "main window color" to (say) red. I get (picture 1):

That's a no. So I go to properties, browsing and change "background color for cut" to red. I can make a screendump, but nothing changes.

And I am still lost. Not seeing these pics.

[Bhikkhu Pesala]

From the File menu, reopen the image after changing the main window colour to white (or anything but black).

[novw]

aha... Yup. I now have a red logo

Thx !