diff options
Diffstat (limited to 'libass/ass_shaper.c')
| -rw-r--r-- | libass/ass_shaper.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/libass/ass_shaper.c b/libass/ass_shaper.c index 1a75ef1..80e78aa 100644 --- a/libass/ass_shaper.c +++ b/libass/ass_shaper.c @@ -267,16 +267,30 @@ size_t ass_glyph_metrics_construct(void *key, void *value, void *priv) } static hb_bool_t -get_glyph(hb_font_t *font, void *font_data, hb_codepoint_t unicode, - hb_codepoint_t variation, hb_codepoint_t *glyph, void *user_data) +get_glyph_nominal(hb_font_t *font, void *font_data, hb_codepoint_t unicode, + hb_codepoint_t *glyph, void *user_data) { FT_Face face = font_data; struct ass_shaper_metrics_data *metrics_priv = user_data; - if (variation) - *glyph = FT_Face_GetCharVariantIndex(face, ass_font_index_magic(face, unicode), variation); - else - *glyph = FT_Get_Char_Index(face, ass_font_index_magic(face, unicode)); + *glyph = FT_Get_Char_Index(face, ass_font_index_magic(face, unicode)); + if (!*glyph) + return false; + + // rotate glyph advances for @fonts while we still know the Unicode codepoints + FT_Glyph_Metrics *metrics = get_cached_metrics(metrics_priv, unicode, *glyph); + ass_cache_dec_ref(metrics); + return true; +} + +static hb_bool_t +get_glyph_variation(hb_font_t *font, void *font_data, hb_codepoint_t unicode, + hb_codepoint_t variation, hb_codepoint_t *glyph, void *user_data) +{ + FT_Face face = font_data; + struct ass_shaper_metrics_data *metrics_priv = user_data; + + *glyph = FT_Face_GetCharVariantIndex(face, ass_font_index_magic(face, unicode), variation); if (!*glyph) return false; @@ -423,7 +437,9 @@ static hb_font_t *get_hb_font(ASS_Shaper *shaper, GlyphInfo *info) hb_font_funcs_t *funcs = hb_font_funcs_create(); font->shaper_priv->font_funcs[info->face_index] = funcs; - hb_font_funcs_set_glyph_func(funcs, get_glyph, + hb_font_funcs_set_nominal_glyph_func(funcs, get_glyph_nominal, + metrics, NULL); + hb_font_funcs_set_variation_glyph_func(funcs, get_glyph_variation, metrics, NULL); hb_font_funcs_set_glyph_h_advance_func(funcs, cached_h_advance, metrics, NULL); |