tree c0f98e458426f878d6ae75a35589f9383c01389b
parent c3721642f1d373f363d02081a94f24984960484e
author Alexei Podtelezhnikov <apodtele@gmail.com> 1599882474 -0400
committer Alexei Podtelezhnikov <apodtele@gmail.com> 1599882474 -0400

[raster] Improve the second pass (#58373).

Besides dropout control the second horizontal sweep is supposed to
clean up straight horizontal edges that are mishandled by the first
vertical sweep when a line passes through pixel centers.  This line
would present as perfectly aligned span edges in the second sweep.

* src/raster/ftraster.c (Horizontal_Sweep_Span): Replace the old
implementation with a better one focusing on aligned span edges only.