Re: [Plplot-devel] Can the rasterization be improved/parameterized?

[Phil R. <p.d...@gm...>]

It looks like the gcc driver is not using antialiasing, nor subpixel accuracy.

Jim-does gcc use GDI or GDI+? GDI has graphics acceleration, but no antialiasing, whereas GDI+ has no graphics accelleration, but can do antialiasing and can do subpixel accuracy. These are the two APIs used by the wxWidgets on Windows for wxMemoryDC and wxGraphicsContext, so I assume gcc uses one of them?

-----Original Message-----
From: "Greg Jung" <gv...@gm...>
Sent: ‎17/‎02/‎2016 07:53
To: "plp...@li..." <plp...@li...>
Subject: [Plplot-devel] Can the rasterization be improved/parameterized?

I am comparing what is done in windows using the wincairo driver and
the normal wingdi/wingcc methods, the diagonal line from Cairo looks
quite straight but the gdi-drawn line is jagged.  




The top-stacked plot uses wincairo while the bottom plot uses the wingdi (which is wingcc
with better lettering and re-scaling).  Each plot is the same, drawing diagonals through 
points (each major tic is 20), about 65 in the top graph.
 
  Does the jagged diagonal arise from an efficiency method that can be parameterized 
to not be so fast, but look better?


Thanks,
Greg