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[autofit] More tilde stretch support. (2/3)

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* src/autofit/aflatin.c (af_latin_stretch_top_tilde,
  af_latin_stretch_bottom_tilde): Return vertical size difference between
  stretched and original contour.
  (af_latin_align_top_tilde, af_latin_align_bottom_tilde): Return applied
  delta.
  (af_latin_hints_apply): Updated; the return values are not used yet.
This commit is contained in:
Werner Lemberg 2025-04-25 12:26:45 +02:00
parent cbce230dcd
commit c6b45a7646
1 changed files with 22 additions and 10 deletions
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32
src/autofit/aflatin.c
View file

@ -3125,7 +3125,9 @@
}
static void
/* Stretch tilde vertically, if necessary, and return the height */
/* difference between the original and the stretched outline. */
static FT_Pos
af_latin_stretch_top_tilde( AF_GlyphHints hints,
FT_Int tilde_contour )
{
@ -3217,7 +3219,7 @@
/* we need a description. */
target_height = min_measurement + 64;
if ( height >= target_height )
return;
return 0;
/* Do the scaling. */
p = first_point;
@ -3230,10 +3232,12 @@
p->y = ( ( p->y - min_y ) * target_height / height ) + min_y;
} while ( p != first_point );
return target_height - height;
}
static void
static FT_Pos
af_latin_stretch_bottom_tilde( AF_GlyphHints hints,
FT_Int tilde_contour )
{
@ -3308,7 +3312,7 @@
target_height = min_measurement + 64;
if ( height >= target_height )
return;
return 0;
p = first_point;
do
@ -3317,6 +3321,8 @@
p->y = ( ( p->y - max_y ) * target_height / height ) + max_y;
} while ( p != first_point );
return target_height - height;
}
@ -3340,8 +3346,10 @@
adjustment does nothing, this function ensures that even without the
intervention of the vertical adjustment step, the tilde will be
grid-aligned.
Return the vertical alignment amount.
*/
static void
static FT_Pos
af_latin_align_top_tilde( AF_GlyphHints hints,
FT_Int tilde_contour )
{
@ -3378,10 +3386,12 @@
delta += ( FT_PIX_ROUND( height ) - height ) / 2;
af_move_contour_vertically( first_point, delta );
return delta;
}
static void
static FT_Pos
af_latin_align_bottom_tilde( AF_GlyphHints hints,
FT_Int tilde_contour )
{
@ -3414,6 +3424,8 @@
delta -= ( FT_PIX_ROUND( height ) - height ) / 2;
af_move_contour_vertically( first_point, delta );
return delta;
}
@ -4623,15 +4635,15 @@
{
top_tilde_contour = af_find_highest_contour( hints );
af_latin_stretch_top_tilde( hints, top_tilde_contour );
af_latin_align_top_tilde( hints, top_tilde_contour );
(void)af_latin_stretch_top_tilde( hints, top_tilde_contour );
(void)af_latin_align_top_tilde( hints, top_tilde_contour );
}
if ( is_bottom_tilde )
{
bottom_tilde_contour = af_find_lowest_contour( hints );
af_latin_stretch_bottom_tilde( hints, bottom_tilde_contour );
af_latin_align_bottom_tilde( hints, bottom_tilde_contour );
(void)af_latin_stretch_bottom_tilde( hints, bottom_tilde_contour );
(void)af_latin_align_bottom_tilde( hints, bottom_tilde_contour );
}
axis = &metrics->axis[AF_DIMENSION_VERT];