Tiff runtime error

[Kevin_Bradley]

Not sure what this message means, but I just added some TIFF files to my project and they’re working great, but the following warning was generated at runtime:

2006-04-16 23:06:38.488 Romulan Hunt[907] Warning: TIFF image with unknown extra samples assumed to have unassociated alpha. RGB values have been premultiplied. Use tiffutil -cat to fix.

Anyone know what this means and how to fix it?

[Bruce_Phillips]

@nitewing98

Anyone know what this means and how to fix it?

Look at the man page for tiffutil In Terminal.

man tiffutil

Look under this section:

Premultiplying TIFF files with alpha (transparency)

When loading TIFF files into Cocoa apps, you might sometimes see the following warning in the console: “Warning: TIFF image with unknown extra samples assumed to have unassociated alpha. RGB values have been premultiplied.”

[Kevin_Bradley]

I tried looking up tiffutil but it is not in my man pages. Maybe it isn’t listed in jaguar’s man but in a later edition. The tiffutil command exists on my machine (it’s in /usr/bin/tiffutil) but I have no idea how to use it.

[Bruce_Phillips]

Maybe this will help:

http://developer.apple.com/documentation/Darwin/Reference/ManPages/man1/tiffutil.1.html

[Kevin_Bradley]

Cool, thanks!