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| author | Grigori Goronzy <greg@blackbox> | 2009-07-20 00:18:55 +0200 |
|---|---|---|
| committer | Grigori Goronzy <greg@blackbox> | 2009-07-20 00:18:55 +0200 |
| commit | 0ba4d4ceb16c1d3d678bcab63506ae6671b87889 (patch) | |
| tree | 433851d22035fec8fdfef9f0d607a4150eeee7c0 | |
| parent | 5f0aa788e9342db7c9ec0d4cd08f5bf19d85bbaa (diff) | |
| download | libass-0ba4d4ceb16c1d3d678bcab63506ae6671b87889.tar.bz2 libass-0ba4d4ceb16c1d3d678bcab63506ae6671b87889.tar.xz | |
Font metrics: prefer OS/2 table for ascender/descender
If possible, use ascender/descender from the OS/2 TTF table. This is
another try to get libass to match VSFilter in regard to vertical font
metrics.
| -rw-r--r-- | libass/ass_font.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/libass/ass_font.c b/libass/ass_font.c index 35d34cf..8a93a4e 100644 --- a/libass/ass_font.c +++ b/libass/ass_font.c @@ -46,8 +46,8 @@ static void charmap_magic(ass_library_t *library, FT_Face face) FT_CharMap cmap = face->charmaps[i]; unsigned pid = cmap->platform_id; unsigned eid = cmap->encoding_id; - if (pid == 3 /*microsoft */ - && (eid == 1 /*unicode bmp */ + if (pid == 3 /*microsoft */ + && (eid == 1 /*unicode bmp */ || eid == 10 /*full unicode */ )) { FT_Set_Charmap(face, cmap); return; @@ -267,10 +267,16 @@ void ass_font_get_asc_desc(ass_font_t *font, uint32_t ch, int *asc, int i; for (i = 0; i < font->n_faces; ++i) { FT_Face face = font->faces[i]; + TT_OS2 *os2 = FT_Get_Sfnt_Table(face, ft_sfnt_os2); if (FT_Get_Char_Index(face, ch)) { int y_scale = face->size->metrics.y_scale; - *asc = FT_MulFix(face->ascender, y_scale); - *desc = FT_MulFix(-face->descender, y_scale); + if (os2) { + *asc = FT_MulFix(os2->usWinAscent, y_scale); + *desc = FT_MulFix(os2->usWinDescent, y_scale); + } else { + *asc = FT_MulFix(face->ascender, y_scale); + *desc = FT_MulFix(-face->descender, y_scale); + } return; } } |