Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!ucsd!ucbvax!pasteur!graft!scott
From: scott@graft.Berkeley.EDU (Scott Silvey)
Newsgroups: comp.windows.x
Subject: Re: XCopyPlane() bug (sort of).
Message-ID: <26025@pasteur.Berkeley.EDU>
Date: 9 Jul 90 22:23:36 GMT
References: <26023@pasteur.Berkeley.EDU>
Sender: news@pasteur.Berkeley.EDU
Reply-To: scott@xcf.berkeley.edu
Organization: UC Berkeley Experimental Computing Facility
Lines: 13

In article <26023@pasteur.Berkeley.EDU>, scott@graft.Berkeley.EDU (Scott
Silvey) writes:
|> The one thing I CAN get to work is to do an XGetImage() and then
query each and
|>   every pixel using XGetPixel().  For each pixel that is not the
background color,
|>   I do and XDrawPoint() on the bitmap.  This is dog-slow though, doing two
|>   X operations per pixel (what if I have a megapixel image?!).

I know I could use XDrawPoints(), cutting down the number of X operations by
  50 percent, but there is still one XGetPixel() call per point.

Scott