Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!gatech!wa4mei!kd4nc!npiatl!dkelly
From: dkelly@npiatl.UUCP (Dwight Kelly)
Newsgroups: comp.windows.x
Subject: Re: Xfish question
Message-ID: <436@npiatl.UUCP>
Date: 22 Aug 89 13:56:30 GMT
Reply-To: dkelly@npiatl.UUCP (Dwight Kelly)
Distribution: na
Organization: Network Publications, Inc.  Atlanta, GA
Lines: 31

>> In article <1334@speedy.mcnc.org> jwb@mcnc.org.UUCP (Jack W. Buchanan
>Jr.) writes:
>> :In article <427@npiatl.UUCP> dkelly@npiatl.UUCP (Dwight Kelly) writes:
>> ::Can xfish run on a 4-bit (16 color) display?  I am getting a X protocol
>> :
>> :I have gotten this to work.  It's easy.  In the file xfish, about midway
>> :through is the error message.  Change the planes <8 to <4.  This will stop
>> :the error message.  Then there are two calls to something like 
>> :XCreate_Window.  In the parameter list there are two 8s.  Change the first
>> :one in each call to 4.  This is the depth of the display.

There is only one call to XCreateWindow and it is created with a depth of 1.
The error occurs when xfish tries to set the background pixmap to a bitmap
that is one-bit deep.  Also, I changed XCreateWindow to XCreateSimpleWindow.

>> I've made this sort of change in a number of programs.  It's very easy
>> to do, but it's just as easy to query the display depth using
>> XDefaultDepth, and it makes the application much more portable.

True.  Why does everyone use XDefaultDepth?

It seems that X does not like to mix 1-bit depth windows & bitmaps with
a display depth of greater than 1-bit depth.  Xfish creates a background
bitmap from data and then tries to set the windows background pixmap to
the this bitmap.  This is where things fail.  Why????

--
Dwight Kelly            UUCP: gatech!npiatl!dkelly
Director R&D            AT&T: (404) 962-7220
Network Publications, Inc    2 Pamplin Drive     Lawrenceville, GA  30245
             Publisher of "The Real Estate Book" nationwide!