Path: utzoo!utgpu!news-server.csri.toronto.edu!smoke.cs.toronto.edu!neat.cs.toronto.edu!moraes
Newsgroups: comp.windows.x
From: moraes@cs.toronto.edu (Mark Moraes)
Subject: Re: How to display a postscript file in X windows?
Message-ID: <90Oct12.045249edt.594@smoke.cs.toronto.edu>
Organization: Department of Computer Science, University of Toronto
References: <9010051327.AA18804@islanders.> <11696@ganymede.inmos.co.uk> <90Oct7.162046edt.665@smoke.cs.toronto.edu> <74@screamer.csee.usf.edu> <106945@convex.convex.com>
Date: 12 Oct 90 08:53:33 GMT
Lines: 70

datri@convex.com (Anthony A. Datri) writes:
>>|>[Perhaps the FAQ should be updated to mention version 2.0,
>>|> and give it precedence over xps -- gs2.0 is MUCH better]

>Yeah, and Ultrix 4.0 is "MUCH better" than Sun's 1.1 release.  Be fair here

At present, the FAQ mentions xps.  All I suggested was that it should
mention gs2.0 and give it precedence over xps.  Which is fair.  [My
comments on Ultrix I will leave out of this newsgroup -- this is a
family forum... :-] The FAQ could mention ralpage as well.  I think
gs2.0 performs better than ralpage on all the PostScript I threw at it.
Then again, I haven't stayed current on ralpage fixes.

People running gs2.0 on servers that support backing store (eg.  MIT
R4 Xsun) may find it far faster if they apply the following fix -- it
stops it from drawing everything into a backing pixmap as well as the
screen and instead turns on backing store. (Statutory warning to ward
off the X Division of the Softies:  the server may choose to not
honour the backing store request and all those carefully drawn bits
will vanish.)  Perhaps use_backing should be an option...

	Mark.

*** /tmp/,RCSt1a08343	Fri Oct 12 04:40:50 1990
--- gdevx.c	Fri Oct 12 03:53:13 1990
***************
*** 48,54 ****
  /* Define whether to use a backing pixmap to handle expose events. */
  /* Note that this is a variable rather than a #define. */
  /* Note also that it is consulted each time we open an X device. */
! private int use_backing = 1;
  
  /* Define the maximum size of the temporary pixmap for copy_mono */
  /* that we are willing to leave lying around in the server */
--- 48,54 ----
  /* Define whether to use a backing pixmap to handle expose events. */
  /* Note that this is a variable rather than a #define. */
  /* Note also that it is consulted each time we open an X device. */
! private int use_backing = 0;
  
  /* Define the maximum size of the temporary pixmap for copy_mono */
  /* that we are willing to leave lying around in the server */
***************
*** 390,395 ****
--- 388,394 ----
  	xswa.event_mask = ExposureMask;
  	xswa.background_pixel = xdev->black;
  	xswa.border_pixel = border_color;
+ 	xswa.backing_store = Always;
  	xdev->win = XCreateWindow(xdev->dpy, RootWindowOfScreen(scr),
  				  sizehints.x, sizehints.y, /* upper left */
  				  sizehints.width, sizehints.height,
***************
*** 397,403 ****
  				  DefaultDepthOfScreen(scr),
  				  InputOutput, /* class */
  				  xdev->vis, /* visual */
! 				  CWEventMask | CWBackPixel | CWBorderPixel,
  				  &xswa);
  	if ( use_backing )
  	  xdev->bpixmap =
--- 396,403 ----
  				  DefaultDepthOfScreen(scr),
  				  InputOutput, /* class */
  				  xdev->vis, /* visual */
! 				  CWBackingStore | CWEventMask |
! 				  CWBackPixel | CWBorderPixel,
  				  &xswa);
  	if ( use_backing )
  	  xdev->bpixmap =