[Octave-bug-tracker] [bug #44916] Printing Qt-drawn figures produces faulty files

[John W. Eaton]

Follow-up Comment #37, bug #44916 (project octave):

When looking at printing plot (1:10), I saw the following differences in the
line.  On the bad system, it would start at (2,2) or (3,3) and on my
virtualbox VM, it would start at (1,1) as expected.  I've trimmed the output
to just focus on the line segment, not the axes.

The following lines correspond to the endpoints of the 9 line segments from
1:10 (RGB value is 0 0 1, so that's the blue line).  These are the values that
gl2ps is getting back from OpenGL.  Note that the first two segments are
duplicate points, so they are don't end up being line segments.  This explains
why part of the line is missing.

The bad system:


   LINE: 119.519989 82.727989 (0.000000 0.000000 1.000000)
   LINE: 119.519989 82.727989 (0.000000 0.000000 1.000000)
   LINE: 208.800003 153.143997 (0.000000 0.000000 1.000000)
   LINE: 208.800003 153.143997 (0.000000 0.000000 1.000000)
   LINE: 208.800003 153.143997 (0.000000 0.000000 1.000000)
   LINE: 253.440002 188.351990 (0.000000 0.000000 1.000000)
   LINE: 253.440002 188.351990 (0.000000 0.000000 1.000000)
   LINE: 298.079987 223.559998 (0.000000 0.000000 1.000000)
   LINE: 298.079987 223.559998 (0.000000 0.000000 1.000000)
   LINE: 342.720001 258.768005 (0.000000 0.000000 1.000000)
   LINE: 342.720001 258.768005 (0.000000 0.000000 1.000000)
   LINE: 387.359985 293.976013 (0.000000 0.000000 1.000000)
   LINE: 387.359985 293.976013 (0.000000 0.000000 1.000000)
   LINE: 432.000000 329.183990 (0.000000 0.000000 1.000000)
   LINE: 432.000000 329.183990 (0.000000 0.000000 1.000000)
   LINE: 476.639984 364.391998 (0.000000 0.000000 1.000000)
   LINE: 476.639984 364.391998 (0.000000 0.000000 1.000000)
   LINE: 521.280029 399.600006 (0.000000 0.000000 1.000000)


On my system, I see the following:


   LINE: 116.203125 92.433594 (0.000000 0.000000 1.000000)
   LINE: 159.601563 126.660156 (0.000000 0.000000 1.000000)
   LINE: 159.601563 126.660156 (0.000000 0.000000 1.000000)
   LINE: 203.000000 160.890625 (0.000000 0.000000 1.000000)
   LINE: 203.000000 160.890625 (0.000000 0.000000 1.000000)
   LINE: 246.402344 195.121094 (0.000000 0.000000 1.000000)
   LINE: 246.402344 195.121094 (0.000000 0.000000 1.000000)
   LINE: 289.800781 229.351563 (0.000000 0.000000 1.000000)
   LINE: 289.800781 229.351563 (0.000000 0.000000 1.000000)
   LINE: 333.199219 263.578125 (0.000000 0.000000 1.000000)
   LINE: 333.199219 263.578125 (0.000000 0.000000 1.000000)
   LINE: 376.597656 297.808594 (0.000000 0.000000 1.000000)
   LINE: 376.597656 297.808594 (0.000000 0.000000 1.000000)
   LINE: 420.000000 332.039063 (0.000000 0.000000 1.000000)
   LINE: 420.000000 332.039063 (0.000000 0.000000 1.000000)
   LINE: 463.398438 366.265625 (0.000000 0.000000 1.000000)
   LINE: 463.398438 366.265625 (0.000000 0.000000 1.000000)
   LINE: 506.796875 400.496094 (0.000000 0.000000 1.000000)



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