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Re: PNGs with alpha channel? [message #33822]

Mon, 03 February 2003 16:01

Rick Towler
Messages: 821
Registered: August 1998

Senior Member

"Paul Woodford" wrote in message
> David Fanning wrote:
>
>> What do you mean by "do not see" it? It doesn't have a fourth
>> dimension, or you can't get the alpha channel to do anything?
>
> It doesn't have a fourth dimension.

It may not. Depending on how the image was created you may have to create
the 4,n,m image yourself using the data from the TRANSPARENT keyword . The
PNG spec allows for full alpha support and a sort of 1-bit support where
specific pixels are considered transparent.

FWIW, I read 4 channel .png files regularly going back to at least 5.3 with
a simple:

image = READ_PNG('myimage.png')

-Rick

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[Message index]

		Re: PNGs with alpha channel? By: Rick Towler on Mon, 03 February 2003 16:01
		Re: PNGs with alpha channel? By: Paul Woodford on Sun, 02 February 2003 12:49
		Re: PNGs with alpha channel? By: David Fanning on Fri, 31 January 2003 22:40
		Re: PNGs with alpha channel? By: Paul Woodford on Tue, 04 February 2003 20:35

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