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| author | Werner Lemberg <wl@gnu.org> | 2018-09-21 11:09:27 +0200 |
|---|---|---|
| committer | Werner Lemberg <wl@gnu.org> | 2018-09-21 11:09:27 +0200 |
| commit | c168cc3b1bf13e5f3ca77c238dcb204ea821c56d (patch) | |
| tree | 156e89277d09e3093124da6ec2c3d55b08bf4a79 | |
| parent | 493aa68f5c4cb2e659570809931539dc1987630c (diff) | |
| download | freetype2-c168cc3b1bf13e5f3ca77c238dcb204ea821c56d.tar.gz | |
[raster] Fix disappearing vertical lines (#54589).
* src/raster/ftraster.c (Vertical_Sweep_Span): Handle special case
where both left and right outline exactly pass pixel centers.
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | src/raster/ftraster.c | 13 |
2 files changed, 16 insertions, 4 deletions
@@ -1,3 +1,10 @@ +2018-09-21 Werner Lemberg <wl@gnu.org> + + [raster] Fix disappearing vertical lines (#54589). + + * src/raster/ftraster.c (Vertical_Sweep_Span): Handle special case + where both left and right outline exactly pass pixel centers. + 2018-09-20 Alexei Podtelezhnikov <apodtele@gmail.com> * src/base/ftobjs.c (ft_glyphslot_reset_bimap): Tiny rounding tweak. diff --git a/src/raster/ftraster.c b/src/raster/ftraster.c index 0c1d88176..23e9f2ae4 100644 --- a/src/raster/ftraster.c +++ b/src/raster/ftraster.c @@ -2246,13 +2246,18 @@ /* Drop-out control */ - e1 = TRUNC( CEILING( x1 ) ); + e1 = CEILING( x1 ); + e2 = FLOOR( x2 ); + /* take care of the special case where both the left */ + /* and right contour lie exactly on pixel centers */ if ( dropOutControl != 2 && - x2 - x1 - ras.precision <= ras.precision_jitter ) + x2 - x1 - ras.precision <= ras.precision_jitter && + e1 != x1 && e2 != x2 ) e2 = e1; - else - e2 = TRUNC( FLOOR( x2 ) ); + + e1 = TRUNC( e1 ); + e2 = TRUNC( e2 ); if ( e2 >= 0 && e1 < ras.bWidth ) { |