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[ft/draw] Implement hb-draw for hb-ft

This commit is contained in:
Behdad Esfahbod 2022-02-04 18:44:38 -06:00
parent 370bec938b
commit 6d5b998f25
1 changed files with 82 additions and 0 deletions
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82
src/hb-ft.cc
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@ -33,12 +33,14 @@
#include "hb-ft.h"
#include "hb-draw.hh"
#include "hb-font.hh"
#include "hb-machinery.hh"
#include "hb-cache.hh"
#include FT_ADVANCES_H
#include FT_MULTIPLE_MASTERS_H
#include FT_OUTLINE_H
#include FT_TRUETYPE_TABLES_H
@ -565,6 +567,82 @@ hb_ft_get_font_h_extents (hb_font_t *font HB_UNUSED,
return true;
}
#ifndef HB_NO_DRAW
static int
_hb_ft_move_to (const FT_Vector *to,
hb_draw_session_t *drawing)
{
drawing->move_to (to->x, to->y);
return FT_Err_Ok;
}
static int
_hb_ft_line_to (const FT_Vector *to,
hb_draw_session_t *drawing)
{
drawing->line_to (to->x, to->y);
return FT_Err_Ok;
}
static int
_hb_ft_conic_to (const FT_Vector *control,
const FT_Vector *to,
hb_draw_session_t *drawing)
{
drawing->quadratic_to (control->x, control->y,
to->x, to->y);
return FT_Err_Ok;
}
static int
_hb_ft_cubic_to (const FT_Vector *control1,
const FT_Vector *control2,
const FT_Vector *to,
hb_draw_session_t *drawing)
{
drawing->cubic_to (control1->x, control1->y,
control2->x, control2->y,
to->x, to->y);
return FT_Err_Ok;
}
static void
hb_ft_get_glyph_shape (hb_font_t *font HB_UNUSED,
void *font_data,
hb_codepoint_t glyph,
hb_draw_funcs_t *draw_funcs, void *draw_data,
void *user_data HB_UNUSED)
{
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
hb_lock_t lock (ft_font->lock);
FT_Face ft_face = ft_font->ft_face;
if (unlikely (FT_Load_Glyph (ft_face, glyph,
FT_LOAD_NO_BITMAP | ft_font->load_flags)))
return;
if (ft_face->glyph->format != FT_GLYPH_FORMAT_OUTLINE)
return;
const FT_Outline_Funcs outline_funcs = {
(FT_Outline_MoveToFunc) _hb_ft_move_to,
(FT_Outline_LineToFunc) _hb_ft_line_to,
(FT_Outline_ConicToFunc) _hb_ft_conic_to,
(FT_Outline_CubicToFunc) _hb_ft_cubic_to,
0, /* shift */
0, /* delta */
};
hb_draw_session_t draw_session (draw_funcs, draw_data);
FT_Outline_Decompose (&ft_face->glyph->outline,
&outline_funcs,
&draw_session);
}
#endif
static inline void free_static_ft_funcs ();
static struct hb_ft_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ft_font_funcs_lazy_loader_t>
@ -596,6 +674,10 @@ static struct hb_ft_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ft
hb_font_funcs_set_glyph_name_func (funcs, hb_ft_get_glyph_name, nullptr, nullptr);
hb_font_funcs_set_glyph_from_name_func (funcs, hb_ft_get_glyph_from_name, nullptr, nullptr);
#ifndef HB_NO_DRAW
hb_font_funcs_set_glyph_shape_func (funcs, hb_ft_get_glyph_shape, nullptr, nullptr);
#endif
hb_font_funcs_make_immutable (funcs);
hb_atexit (free_static_ft_funcs);