Bug 689412

Summary:	Top margin too large only on first page
Product:	GhostPCL	Reporter:	Ron Hosler <hosler>
Component:	PCL interpreter	Assignee:	Henry Stiles <henry.stiles>
Status:	NOTIFIED WONTFIX
Severity:	normal	Keywords:	bountiable
Priority:	P4
Version:	1.41
Hardware:	PC
OS:	All
Customer:		Word Size:	---
Attachments:	Test case that fails 689412.pcl a more conspicuous example

Description Ron Hosler 2007-08-22 08:04:07 UTC

1B E             Reset
1B &k2G          End-of-line Termination: CR=CR,LF=CR+LF,FF=CR+FF
1B &s1C          EOL Wrap: No
1B (s4099T       Primary Typeface: Courier
1B (s0P          Primary Spacing: Fixed
1B (s12.706H     Primary Pitch: 12.706 CPI
1B &a131M        Right Margin: 131 Columns
1B &l2A          Page Size: Letter
1B &l0S          Simplex/Duplex: Simplex
1B &l1O          Orientation: Landscape
1B &l5.4545C     Vertical Motion Index: 5.4545 X .0208-inch
prints 65 lines on the first page. Moving the landscape sequence to the end
produces the correct results on all pages.

Comment 1 Ron Hosler 2007-08-22 08:13:27 UTC

Created attachment 3298 [details]
Test case that fails

When sent to HP printer all pages contain 66 lines.

Comment 2 Marcos H. Woehrmann 2007-08-29 07:40:51 UTC

I've been able to duplicate this bug in the current PCL tarball: 
ghostpcl-r2871+8137.  The attached file prints through line 66 on page 1 on my
HP LaserJet 4500DN but GhostPCL puts line 66 on the top of the next page.

The file has some extra characters, which I'll remove to make a simpler test case.

Comment 3 Marcos H. Woehrmann 2007-08-29 07:47:27 UTC

Created attachment 3331 [details]
689412.pcl

Simplified test case.  

HP LaserJet 4500 prints all 66 lines on first page; GhostPCL prints line 66 on
page 2.

Comment 4 Henry Stiles 2007-09-12 14:03:09 UTC

Created attachment 3360 [details]
a more conspicuous example

This example illustrates that the cursor home position should be recalculated
when VMI changes.  We have not tested the side effects of changing VMI in the
middle of the page.  The bug is marked bountiable and I am not sure if Ron
Hosler wanted to continue working it.

The example was changed to use 1 pixel wide rectangles so pixel position can be
measured accurately.  The first line should appear 1/2" + .75 * VMI from the
top of the page.

Comment 5 Henry Stiles 2008-04-28 16:28:00 UTC

More experiments show that the cursor position is not updated if either a
positioning command was given or the page was marked prior to the vmi command,
we suspect other conditions would result in no movement also.  An explicit start
position should be given in the pcl file.  We are not inclined to emulate this,
closing as wontfix.