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[autofit] Fix and add comments.

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This commit is contained in:
Werner Lemberg 2011-05-02 06:04:15 +02:00
parent 3a0844c8ef
commit c3135e43f5
2 changed files with 14 additions and 7 deletions
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19
src/autofit/aflatin.c
View File

@ -614,7 +614,7 @@
}
/* an extra-light axis corresponds to a standard width that is */
/* smaller than 0.75 pixels */
/* smaller than 5/8 pixels */
axis->extra_light =
(FT_Bool)( FT_MulFix( axis->standard_width, scale ) < 32 + 8 );
@ -1059,7 +1059,7 @@
/* */
/*********************************************************************/
/* assure that edge distance threshold is at least 0.25px */
/* assure that edge distance threshold is at most 0.25px */
edge_distance_threshold = FT_MulFix( laxis->edge_distance_threshold,
scale );
if ( edge_distance_threshold > 64 / 4 )
@ -1787,7 +1787,7 @@
for ( edge = edges; edge < edge_limit; edge++ )
{
AF_Width blue;
AF_Edge edge1, edge2;
AF_Edge edge1, edge2; /* these edges form the stem to check */
if ( edge->flags & AF_EDGE_DONE )
@ -1800,6 +1800,7 @@
if ( blue )
edge1 = edge;
/* flip edges if the other stem is aligned to a blue zone */
else if ( edge2 && edge2->blue_edge )
{
blue = edge2->blue_edge;
@ -1829,8 +1830,8 @@
}
}
/* now we align all stem edges, trying to maintain the */
/* relative order of stems in the glyph */
/* now we align all other stem edges, trying to maintain the */
/* relative order of stems in the glyph */
for ( edge = edges; edge < edge_limit; edge++ )
{
AF_Edge edge2;
@ -1861,6 +1862,8 @@
if ( !anchor )
{
/* if we reach this if clause, no stem has been aligned yet */
FT_Pos org_len, org_center, cur_len;
FT_Pos cur_pos1, error1, error2, u_off, d_off;
@ -1871,14 +1874,18 @@
(AF_Edge_Flags)edge->flags,
(AF_Edge_Flags)edge2->flags );
/* some voodoo to specially round edges for small stem widths */
/* some voodoo to specially round edges for small stem widths; */
/* the idea is to align the center of a stem, then shifting */
/* the stem edges to suitable positions */
if ( cur_len <= 64 )
{
/* width <= 1px */
u_off = 32;
d_off = 32;
}
else
{
/* 1px < width < 1.5px */
u_off = 38;
d_off = 26;
}

2
src/autofit/aflatin2.c
View File

@ -594,7 +594,7 @@
}
/* an extra-light axis corresponds to a standard width that is */
/* smaller than 0.75 pixels */
/* smaller than 5/8 pixels */
axis->extra_light =
(FT_Bool)( FT_MulFix( axis->standard_width, scale ) < 32 + 8 );