Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!ucdavis!csusac!csuchico.edu!csuchico.edu!warlock
From: warlock@csuchico.edu (John Kennedy)
Newsgroups: comp.windows.x
Subject: Drawable <--> user-defined data
Keywords: drawable
Message-ID: <1990Mar02.220228.24964@csuchico.edu>
Date: 2 Mar 90 22:02:28 GMT
Sender: news@csuchico.edu (USENET)
Reply-To: warlock@csuchico.edu (John Kennedy)
Organization: California State University, Chico
Lines: 30


  I'm looking for the "best" way to transfer user-defined data (say an array
of char) and put it into a drawable (color).  The only way I can see now with
the current X11R4 Xlib documentation is to convert the drawable into an XImage
and the get at the data field.  In addition, I have the following situation:

  Running on a Sun 3/60 or SPARC using cgfour and cgsix frame buffers.
  X11R4 (Standard distribution)
  We're looking for *speed* out of this operation

  The operation will be used to copy the contents of the frame buffer memory
into a drawable so the screen can be fully managed by X when we aren't using
speedy frame-buffer functions (for those in the know, the cgfour is too slow to
alter quickly using window-related functions, so a program I wrote directly
accesses frame buffer memory, leaving the screen with incorrect contents as far
as X is concerned).  Basically, I want to take the image on the screen and
store it in the drawable so X has the same image.

  The area X and I are sharing is a 769 by 769 square.


Warlock, AKA              +----------------------------------------------------
John Kennedy              | uucp:     lampoon!warlock@csuchico.edu
CSCI Student	          | internet: warlock@csuchico.edu
CSU Chico                 +----------------------------------------------------
--
Warlock, AKA              +----------------------------------------------------
John Kennedy              | uucp:     lampoon!warlock@csuchico.edu
CSCI Student	          | internet: warlock@csuchico.edu
CSU Chico                 +----------------------------------------------------