[Octave-bug-tracker] [bug #49627] Incompatible "screenpixelsperinch" property

[Rik]

Follow-up Comment #2, bug #49627 (project octave):

A related issue is bug #53056.  In that bug report, the issue is that the
linewidth expected by the glLineWidth call is measured in pixels, but the
graphics property LineWidth is measured in points.  The conversion is


pixelwidth = Monitor_Pixels_Per_Inch / Points_Per_Inch * LineWidth_Points


Points_Per_Inch is a fixed constant of 72.  If we follow Matlab, then the
Monitor_Pixels_Per_inch is always 96 and the overall factor is 96/72 == 4/3.

I don't fully understand all the implications of moving to a fixed PPI,
however, so I can't recommend Octave do this until it is fully understood.


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