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[ot-font] Add advances() callbacks

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This commit is contained in:
Behdad Esfahbod 2018-09-11 12:55:54 +02:00
parent 0ea42e117b
commit d8a67dac2a
1 changed files with 42 additions and 1 deletions
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43
src/hb-ot-font.cc
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@ -46,7 +46,6 @@ hb_ot_get_nominal_glyph (hb_font_t *font HB_UNUSED,
hb_codepoint_t unicode,
hb_codepoint_t *glyph,
void *user_data HB_UNUSED)
{
const hb_ot_face_data_t *ot_font = (const hb_ot_face_data_t *) font_data;
return ot_font->cmap.get_relaxed()->get_nominal_glyph (unicode, glyph);
@ -74,6 +73,26 @@ hb_ot_get_glyph_h_advance (hb_font_t *font,
return font->em_scale_x (ot_font->hmtx.get_relaxed ()->get_advance (glyph, font));
}
static void
hb_ot_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_ot_face_data_t *ot_font = (const hb_ot_face_data_t *) font_data;
const OT::hmtx_accelerator_t &hmtx = *ot_font->hmtx.get_relaxed ();
for (unsigned int i = 0; i < count; i++)
{
*first_advance = font->em_scale_x (hmtx.get_advance (*first_glyph, font));
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_ot_get_glyph_v_advance (hb_font_t *font,
void *font_data,
@ -84,6 +103,26 @@ hb_ot_get_glyph_v_advance (hb_font_t *font,
return font->em_scale_y (-(int) ot_font->vmtx.get_relaxed ()->get_advance (glyph, font));
}
static void
hb_ot_get_glyph_v_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_ot_face_data_t *ot_font = (const hb_ot_face_data_t *) font_data;
const OT::vmtx_accelerator_t &vmtx = *ot_font->vmtx.get_relaxed ();
for (unsigned int i = 0; i < count; i++)
{
*first_advance = font->em_scale_y (-(int) vmtx.get_advance (*first_glyph, font));
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_ot_get_glyph_h_kerning (hb_font_t *font,
void *font_data,
@ -179,7 +218,9 @@ static struct hb_ot_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ot
hb_font_funcs_set_nominal_glyph_func (funcs, hb_ot_get_nominal_glyph, nullptr, nullptr);
hb_font_funcs_set_variation_glyph_func (funcs, hb_ot_get_variation_glyph, nullptr, nullptr);
hb_font_funcs_set_glyph_h_advance_func (funcs, hb_ot_get_glyph_h_advance, nullptr, nullptr);
hb_font_funcs_set_glyph_h_advances_func (funcs, hb_ot_get_glyph_h_advances, nullptr, nullptr);
hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ot_get_glyph_v_advance, nullptr, nullptr);
hb_font_funcs_set_glyph_v_advances_func (funcs, hb_ot_get_glyph_v_advances, nullptr, nullptr);
//hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ot_get_glyph_h_origin, nullptr, nullptr);
//hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ot_get_glyph_v_origin, nullptr, nullptr);
hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ot_get_glyph_h_kerning, nullptr, nullptr);