On Fri, 29 May 1998, Grant McDorman wrote:
> Both xv and xwd don't work with mixed visuals - i.e. if your default visual
> is 8bpp, but you're grabbing windows that are 16 or 24 bits deep. If that
> isn't the case, then they're fine; if, on the other hand, you do have that
> case you get what you described - black images. They both work with 24 bits
> - or, at least, the vanilla X11R6.3 and Solaris 2.5 xwd work with 24 bits. I
> do not know about 16bpp.
I've found that xv doesn't work properly with 24-bit packed visuals. 32-bit
works, but 24 doesn't. xwd does work, but xv has the same problem displaying
24-bit xwd files as it does with 24-bit screen captures! xwud or the GIMP can
display the files ok.
There is also an XV bug where after a grab the window doesn't get updated.
The grab works ok, but whatever image you were viewing before is still
displayed. There is a patch for xv that fixes this.
> Note, also, that with your 16bpp display could be TrueColour or
> PseudoColour. In the latter case, you have a (rather large) colourmap; it is
> unlikely that xv and xwd would expect to get a 64K colourmap instead of the
> usual 256.
16 bit PseudoColour hardware exists?
> GIMP - at least early versions I tried - did not work at all with
> non-TrueColour displays (it made invalid assumptions about what could be
> done with colourmapped displays). If your display is TrueColour, then it's
> feasible; otherwise, I wouldn't suggest it.
GIMP has worked with PseudoColor visuals for a long time now, at least, as
long as I can remember.
|Gazing up to the breeze of the heavens \ on a quest, meaning, reason |
|came to be, how it begun \ all alone in the family of the sun |
|curiosity teasing everyone \ on our home, third stone from the sun. |
|Trent Piepho (xyzzy_at_u.washington.edu) -- Metallica |
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Received on Fri May 29 1998 - 12:39:02 BST