Re: XForms: flimage expose is slow

From: Luis Balona (lab@maia.saao.ac.za)
Date: Sun Feb 18 2001 - 03:06:53 EST

Next message: Luis Balona: "XForms: Image zoom/pan routine"

Previous message: Steve Lamont: "Re: XForms: What am I doing wrong? - pixmap"
In reply to: Steve Lamont: "Re: XForms: flimage expose is slow"
Next in thread: Mauricio Vieira: "XForms: What am I doing wrong? - pixmap"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

# To subscribers of the xforms list from Luis Balona <lab@maia.saao.ac.za> :

Quoting Steve Lamont <spl@ncmir.ucsd.edu>:

> My favorite trick in using a Canvas is to create a Pixmap and use the
> Xlib function XSetBackgroundPixmap() to paste the Pixmap of the image
> onto the background, then let the X server handle the refresh.
raphics to be drawn completely.
>

I guess that should read "XsetWindowBackgroundPixmap(). I tried this, but got a
uniform blue display (no image). However, I have solved the problem. All I
needed to do is to enable double buffering:

image->double_buffer = 1 ;

Now I get instantaneous refresh for expose events.

Many thanks Steve!
_________________________________________________
To unsubscribe, send the message "unsubscribe" to
xforms-request@bob.usuhs.mil or see
http://bob.usuhs.mil/mailserv/xforms.html
XForms Home Page: http://world.std.com/~xforms
List Archive: http://bob.usuhs.mil/mailserv/list-archives/

Next message: Luis Balona: "XForms: Image zoom/pan routine"
Previous message: Steve Lamont: "Re: XForms: What am I doing wrong? - pixmap"
In reply to: Steve Lamont: "Re: XForms: flimage expose is slow"
Next in thread: Mauricio Vieira: "XForms: What am I doing wrong? - pixmap"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Sat Feb 17 2001 - 22:48:40 EST