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[ft] Add advances() callback

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This commit is contained in:
Behdad Esfahbod 2018-09-11 13:05:47 +02:00
parent cbea7d49ab
commit 237f215378
1 changed files with 27 additions and 0 deletions
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27
src/hb-ft.cc
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@ -228,6 +228,32 @@ hb_ft_get_glyph_h_advance (hb_font_t *font,
return (v + (1<<9)) >> 10;
}
static void
hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data,
unsigned count,
hb_codepoint_t *first_glyph,
unsigned glyph_stride,
hb_position_t *first_advance,
unsigned advance_stride,
void *user_data HB_UNUSED)
{
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
FT_Face ft_face = ft_font->ft_face;
int load_flags = ft_font->load_flags;
int mult = font->x_scale < 0 ? -1 : +1;
FT_Fixed v;
for (unsigned int i = 0; i < count; i++)
{
v = 0;
FT_Get_Advance (ft_face, *first_glyph, load_flags, &v);
*first_advance = (v * mult + (1<<9)) >> 10;
first_glyph = &StructAtOffset<hb_codepoint_t> (first_glyph, glyph_stride);
first_advance = &StructAtOffset<hb_position_t> (first_advance, advance_stride);
}
}
static hb_position_t
hb_ft_get_glyph_v_advance (hb_font_t *font,
void *font_data,
@ -433,6 +459,7 @@ static struct hb_ft_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ft
hb_font_funcs_set_nominal_glyph_func (funcs, hb_ft_get_nominal_glyph, nullptr, nullptr);
hb_font_funcs_set_variation_glyph_func (funcs, hb_ft_get_variation_glyph, nullptr, nullptr);
hb_font_funcs_set_glyph_h_advance_func (funcs, hb_ft_get_glyph_h_advance, nullptr, nullptr);
hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ft_get_glyph_h_advances, nullptr, nullptr);
hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ft_get_glyph_v_advance, nullptr, nullptr);
//hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ft_get_glyph_h_origin, nullptr, nullptr);
hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ft_get_glyph_v_origin, nullptr, nullptr);