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From: gary@POPEYE.SFSU.EDU (Gary Fong)
Newsgroups: comp.windows.x
Subject: Help with XWD file format
Message-ID: <9012191555.AA16304@popeye.sfsu.edu>
Date: 19 Dec 90 15:55:00 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: Exploring System Earth, San Francisco State University
Lines: 26

Hello xperts,

RE: Questions about the XWD format.

1:  In the XWDFileHeader structure, what does the `ncolors' member represent?
    I know it says that it is the number of color structures.  Does this refer
    to the XColor structures that follow thus implying that many color as well?

2:  If the `ncolors' member doesn't represent the actual number of unique
    colors in the XWD image, how can this number be determined?

In a PBMPLUS utility, `ppmtoxwd', this member does NOT get the actual number of
colors but the number of colormap entries.  I modified `ppmtoxwd' to print out
the actual number of colors and that many XColor structures.  `xwud' and HP's
own library function `XHPFileToPixmap' (which reads a XWD file into a pixmap)
works fine but `xloadimage' doesn't.

Reply via email or to comp.windows.x.

Thanks in advance,

Gary Fong
gary@popeye.sfsu.edu (Internet)
Exploring System Earth
San Francisco State University
(Meat is MURDER!! in my opinion)