Am 02.03.2011 01:19, schrieb clipka:
> You live and learn - I didn't even know that there /is/ some official
> way of supporting an alpha channel with bmp. I was always convinced it
> was a hack format that makes use of the padding byte of the
> pad-to-32-bit variant of BMP (Well, in the case of POV-Ray it apparently
> is).
>

Note that BMP files with a BitmapV4Header

http://msdn.microsoft.com/en-us/library/dd183380%28v=vs.85%29.aspx

(or its successor BitmapV5Header) are not recognized as such (and 
usually are rejected with a "not a valid BMP file" error) by most 
applications even within the Windows world - at least this was true two 
years ago when I myself would have preferred to write a V4-header as it 
also supports gamma information.
IIRC even Windows XP SP2 build-in-viewer did not handle it.

-Ive

Post a reply to this message