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detect "extra-light" fonts in the auto-hinter in order to avoid producing weird results with them

This commit is contained in:
David Turner 2007-04-02 13:13:54 +00:00
parent 24fd93d6ec
commit e6472c1251
3 changed files with 17 additions and 1 deletions
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6
ChangeLog
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@ -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

10
src/autofit/aflatin.c
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@ -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 )

2
src/autofit/aflatin.h
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@ -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;