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[embolden] Adjust advance values

This commit is contained in:
Behdad Esfahbod 2023-02-01 17:37:10 -07:00
parent b087266e51
commit 2119eab69f
2 changed files with 44 additions and 1 deletions
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16
src/hb-ft.cc
View File

@ -448,6 +448,7 @@ hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data,
void *user_data HB_UNUSED)
{
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
hb_position_t *orig_first_advance = first_advance;
hb_lock_t lock (ft_font->lock);
FT_Face ft_face = ft_font->ft_face;
int load_flags = ft_font->load_flags;
@ -488,6 +489,18 @@ hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data,
first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
if (font->x_shift)
{
/* Emboldening. */
hb_position_t x_shift = font->x_scale >= 0 ? font->x_shift : -font->x_shift;
first_advance = orig_first_advance;
for (unsigned int i = 0; i < count; i++)
{
*first_advance += *first_advance ? x_shift : 0;
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
}
}
#ifndef HB_NO_VERTICAL
@ -523,7 +536,8 @@ hb_ft_get_glyph_v_advance (hb_font_t *font,
/* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
* have a Y growing upward. Hence the extra negation. */
return (-v + (1<<9)) >> 10;
hb_position_t y_shift = font->y_scale >= 0 ? font->y_shift : -font->y_shift;
return ((-v + (1<<9)) >> 10) + y_shift;
}
#endif

29
src/hb-ot-font.cc
View File

@ -181,10 +181,13 @@ hb_ot_get_glyph_h_advances (hb_font_t* font, void* font_data,
unsigned advance_stride,
void *user_data HB_UNUSED)
{
const hb_ot_font_t *ot_font = (const hb_ot_font_t *) font_data;
const hb_ot_face_t *ot_face = ot_font->ot_face;
const OT::hmtx_accelerator_t &hmtx = *ot_face->hmtx;
hb_position_t *orig_first_advance = first_advance;
#ifndef HB_NO_VAR
const OT::HVAR &HVAR = *hmtx.var_table;
const OT::VariationStore &varStore = &HVAR + HVAR.varStore;
@ -258,6 +261,18 @@ hb_ot_get_glyph_h_advances (hb_font_t* font, void* font_data,
#ifndef HB_NO_VAR
OT::VariationStore::destroy_cache (varStore_cache);
#endif
if (font->x_shift)
{
/* Emboldening. */
hb_position_t x_shift = font->x_scale >= 0 ? font->x_shift : -font->x_shift;
first_advance = orig_first_advance;
for (unsigned int i = 0; i < count; i++)
{
*first_advance += *first_advance ? x_shift : 0;
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
}
}
#ifndef HB_NO_VERTICAL
@ -274,6 +289,8 @@ hb_ot_get_glyph_v_advances (hb_font_t* font, void* font_data,
const hb_ot_face_t *ot_face = ot_font->ot_face;
const OT::vmtx_accelerator_t &vmtx = *ot_face->vmtx;
hb_position_t *orig_first_advance = first_advance;
if (vmtx.has_data ())
{
#ifndef HB_NO_VAR
@ -308,6 +325,18 @@ hb_ot_get_glyph_v_advances (hb_font_t* font, void* font_data,
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
}
if (font->y_shift)
{
/* Emboldening. */
hb_position_t y_shift = font->y_scale >= 0 ? font->y_shift : -font->y_shift;
first_advance = orig_first_advance;
for (unsigned int i = 0; i < count; i++)
{
*first_advance += *first_advance ? y_shift : 0;
first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride);
}
}
}
#endif