Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!cs.utexas.edu!usc!apple!hercules!aida
From: aida@porthos (Hitoshi Aida)
Newsgroups: gnu.ghostscript.bug
Subject: Re: two windows is too many
Message-ID: <11772@hercules.csl.sri.com>
Date: 31 Jul 89 19:28:47 GMT
References: <8907282004.AA02231@rothko.cray.com>
Sender: usenet@csl.sri.com
Reply-To: aida@porthos.UUCP (Hitoshi Aida)
Distribution: gnu
Organization: Computer Science Laboratory, SRI International, Menlo Park, CA  USA
Lines: 84

In article <8907282004.AA02231@rothko.cray.com> hrp@boring.cray.com (Hal Peterson) writes:
>On startup under X, Ghostscript opens two windows; the first one stays
>blank and the second one gets all of the graphics.  This is happening
>because the X device is being initialized twice, once from the C code
>in gs_set_device and once from the Ghostscript setup code in ghost.ps.
>This is a fix in multiple steps:
>
>1.  since ghost.ps will initialize and set the real device, I modified
>    gs_state_alloc to initialize with the null device instead of with
>    a real one.
>
>2.  ghost.ps now needs a way to get the real default device, so I
>    dropped defaultdevice into C code.
>
>3.  and while I was at it I cleaned up a bunch of incorrect
>    declarations at the beginning of gsdevice.c (they were missing
>    ``private'' keywords and gcc yelled at me).
>
I had similar problem when I ported Ghostscript 1.3 to SunView environment.
My fix was more simple: sticking to defaultdevice all the way.  Doing this
in X requires a little modification of X driver, i.e. initializing matrix
within the driver.  I've never used Ghostscript in X, but I think following
patch would work.

Hitoshi AIDA (aida@csl.sri.com)
Computer Science Laboratory, SRI International
---------------- cut here ----------------
*** gdevx.c	Tue Jun 20 08:43:55 1989
--- gdevx.c.new	Tue Jul 25 12:49:06 1989
***************
*** 128,134 ****
  gx_device_X x_device = {
  	sizeof(gx_device_X),
  	&x_procs,
! 	identity_matrix_body,
  	640, 350,		/* x and y extent */
  		/* Following parameters are initialized for monochrome */
  	0,			/* has color */
--- 128,134 ----
  gx_device_X x_device = {
  	sizeof(gx_device_X),
  	&x_procs,
! 	1.0,0, 0.0,0, 0.0,0, -1.0,0, 0.0,0, 350.0,0,	/* initial matrix */
  	640, 350,		/* x and y extent */
  		/* Following parameters are initialized for monochrome */
  	0,			/* has color */
***************
*** 186,192 ****
  	/* Leave some space for a window manager's title bar */
  	winH = HeightOfScreen(xdev->scr) - 15;
  	winY = 0;
! 	xdev->height = winH;
  	xdev->black = BlackPixelOfScreen(xdev->scr);
  	xdev->white = WhitePixelOfScreen(xdev->scr);
  	xdev->back_color = xdev->fore_color = -1;	/* undefined */
--- 186,192 ----
  	/* Leave some space for a window manager's title bar */
  	winH = HeightOfScreen(xdev->scr) - 15;
  	winY = 0;
! 	xdev->initial_matrix.ty = xdev->height = winH;
  	xdev->black = BlackPixelOfScreen(xdev->scr);
  	xdev->white = WhitePixelOfScreen(xdev->scr);
  	xdev->back_color = xdev->fore_color = -1;	/* undefined */
*** ghost.ps.org	Tue Jun 20 04:31:52 1989
--- ghost.ps	Thu Jul 13 16:46:12 1989
***************
*** 309,317 ****
  % Map the screen height to an 11" page.
  % This is not necessarily the best compromise.
  DISPLAYING
!  { .device.height 72 11 mul div
!    [1 index .aspect.ratio mul 0 0 4 index neg 0 .device.height]
!    .device.width 8 idiv .device.height { } framedevice pop
   }
   { nulldevice
   } ifelse
--- 309,315 ----
  % Map the screen height to an 11" page.
  % This is not necessarily the best compromise.
  DISPLAYING
!  { defaultdevice setdevice
   }
   { nulldevice
   } ifelse