Commit e6472c1251b6abdc884e63c752b862248eff8904
2007-04-02T13:13:54
detect "extra-light" fonts in the auto-hinter in order to avoid producing weird results with them
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diff --git a/ChangeLog b/ChangeLog
index 8f79222..56ea485 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2007-04-02 David Turner <david@freetype.org>
+
+ * src/autofit/aflatin.h, src/autofit/aflatin.c: add special code to
+ detect "extra-light" fonts and do not snap their stem widths too much
+ to avoid bizarre hinting effects.
+
2007-03-28 David Turner <david@freetype.org>
* src/base/ftbitmap.c (ft_bitmap_assure_buffer): Fix zero-ing of the
diff --git a/src/autofit/aflatin.c b/src/autofit/aflatin.c
index cba9b6e..59aaa8d 100644
--- a/src/autofit/aflatin.c
+++ b/src/autofit/aflatin.c
@@ -133,6 +133,8 @@
/* let's try 20% of the smallest width */
axis->edge_distance_threshold = stdw / 5;
+ axis->standard_width = stdw;
+ axis->extra_light = 0;
}
}
@@ -523,6 +525,11 @@
width->fit = width->cur;
}
+ /* an extra-light axis corresponds to a standard width that is smaller
+ * than 0.75 pixels
+ */
+ axis->extra_light = (FT_MulFix(axis->standard_width, scale) < 32+8);
+
if ( dim == AF_DIMENSION_VERT )
{
/* scale the blue zones */
@@ -1531,7 +1538,8 @@
FT_Int vertical = ( dim == AF_DIMENSION_VERT );
- if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) )
+ if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ||
+ axis->extra_light )
return width;
if ( dist < 0 )
diff --git a/src/autofit/aflatin.h b/src/autofit/aflatin.h
index e73c44a..756e778 100644
--- a/src/autofit/aflatin.h
+++ b/src/autofit/aflatin.h
@@ -102,6 +102,8 @@ FT_BEGIN_HEADER
FT_UInt width_count;
AF_WidthRec widths[AF_LATIN_MAX_WIDTHS];
FT_Pos edge_distance_threshold;
+ FT_Pos standard_width;
+ FT_Bool extra_light;
/* ignored for horizontal metrics */
FT_Bool control_overshoot;