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experimental auto-hinter updates

This commit is contained in:
David Turner 2007-06-11 20:35:54 +00:00
parent b38c15da09
commit a48162759e
1 changed files with 21 additions and 7 deletions
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28
src/autofit/aflatin2.c
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@ -1913,11 +1913,14 @@
org_left = org_pos + ((org_len - cur_len) >> 1);
org_right = org_pos + ((org_len + cur_len) >> 1);
AF_LOG(( "ALIGN: left=%.2f right=%.2f ", org_left/64.0, org_right/64.0 ));
cur_center = org_center;
if ( edge2->flags & AF_EDGE_DONE )
{
AF_LOG(( "\n" ));
edge->pos = edge2->pos - cur_len;
}
else
{
/* we want to compare several displacement, and choose
@ -1929,18 +1932,24 @@
/* note: don't even try to fit tiny stems */
if ( cur_len < 32 )
{
AF_LOG(( "tiny stem\n" ));
goto AlignStem;
}
/* if the span is within a single pixel, don't touch it */
if ( FT_PIX_FLOOR(org_left) == FT_PIX_CEIL(org_right) )
{
AF_LOG(( "single pixel stem\n" ));
goto AlignStem;
}
if (cur_len <= 96)
{
/* we want to avoid the absolute worst case which is
* when the left and right edges of the span each represent
* about 50% of the gray. we'd better want to change this
* to 20/80%, since this is much more pleasant to the eye with
* to 25/75%, since this is much more pleasant to the eye with
* very acceptable distortion
*/
FT_Pos frac_left = (org_left) & 63;
@ -1950,16 +1959,18 @@
frac_right >= 22 && frac_right <= 42 )
{
org = frac_left;
fit = (org <= 32) ? 13 : 51;
fit = (org <= 32) ? 16 : 48;
delta = FT_ABS(fit - org);
displacements[count] = fit - org;
scores[count++] = delta;
AF_LOG(( "dispA=%.2f (%d) ", (fit - org)/64.0, delta ));
org = frac_right;
fit = (org <= 32) ? 13 : 51;
fit = (org <= 32) ? 16 : 48;
delta = FT_ABS(fit - org);
displacement[count] = fit - org;
displacements[count] = fit - org;
scores[count++] = delta;
AF_LOG(( "dispB=%.2f (%d) ", (fit - org)/64.0, delta ));
}
}
@ -1969,6 +1980,7 @@
delta = FT_ABS(fit - org);
displacements[count] = fit - org;
scores[count++] = delta;
AF_LOG(( "dispC=%.2f (%d) ", (fit - org)/64.0, delta ));
/* snapping the right edge to the grid */
org = org_right;
@ -1976,6 +1988,7 @@
delta = FT_ABS(fit - org);
displacements[count] = fit - org;
scores[count++] = delta;
AF_LOG(( "dispD=%.2f (%d) ", (fit - org)/64.0, delta ));
/* now find the best displacement */
{
@ -1994,6 +2007,7 @@
cur_center = org_center + best_disp;
}
AF_LOG(( "\n" ));
}
AlignStem:
@ -2033,7 +2047,7 @@
/* We don't handle horizontal edges since we can't easily assure that */
/* the third (lowest) stem aligns with the base line; it might end up */
/* one pixel higher or lower. */
#if 0
n_edges = edge_limit - edges;
if ( dim == AF_DIMENSION_HORZ && ( n_edges == 6 || n_edges == 12 ) )
{
@ -2080,7 +2094,7 @@
edge3->link->flags |= AF_EDGE_DONE;
}
}
#endif
if ( has_serifs || !anchor )
{
/*