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src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ft.cc

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*** 25,91 **** * * Red Hat Author(s): Behdad Esfahbod * Google Author(s): Behdad Esfahbod */ ! #include "hb-private.hh" ! #include "hb-debug.hh" #include "hb-ft.h" ! #include "hb-font-private.hh" #include FT_ADVANCES_H #include FT_MULTIPLE_MASTERS_H #include FT_TRUETYPE_TABLES_H /* TODO: * * In general, this file does a fine job of what it's supposed to do. * There are, however, things that need more work: * - * - I remember seeing FT_Get_Advance() without the NO_HINTING flag to be buggy. - * Have not investigated. - * * - FreeType works in 26.6 mode. Clients can decide to use that mode, and everything * would work fine. However, we also abuse this API for performing in font-space, * but don't pass the correct flags to FreeType. We just abuse the no-hinting mode * for that, such that no rounding etc happens. As such, we don't set ppem, and * pass NO_HINTING as load_flags. Would be much better to use NO_SCALE, and scale ! * ourselves, like we do in uniscribe, etc. * * - We don't handle / allow for emboldening / obliqueing. * * - In the future, we should add constructors to create fonts in font space? - * - * - FT_Load_Glyph() is extremely costly. Do something about it? */ struct hb_ft_font_t { FT_Face ft_face; int load_flags; bool symbol; /* Whether selected cmap is symbol cmap. */ bool unref; /* Whether to destroy ft_face when done. */ }; static hb_ft_font_t * _hb_ft_font_create (FT_Face ft_face, bool symbol, bool unref) { hb_ft_font_t *ft_font = (hb_ft_font_t *) calloc (1, sizeof (hb_ft_font_t)); if (unlikely (!ft_font)) return nullptr; ft_font->ft_face = ft_face; ft_font->symbol = symbol; ft_font->unref = unref; ft_font->load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING; return ft_font; } static void _hb_ft_face_destroy (void *data) --- 25,106 ---- * * Red Hat Author(s): Behdad Esfahbod * Google Author(s): Behdad Esfahbod */ ! #include "hb.hh" #include "hb-ft.h" ! #include "hb-font.hh" ! #include "hb-machinery.hh" ! #include "hb-cache.hh" #include FT_ADVANCES_H #include FT_MULTIPLE_MASTERS_H #include FT_TRUETYPE_TABLES_H + /** + * SECTION:hb-ft + * @title: hb-ft + * @short_description: FreeType integration + * @include: hb-ft.h + * + * Functions for using HarfBuzz with the FreeType library to provide face and + * font data. + **/ + + /* TODO: * * In general, this file does a fine job of what it's supposed to do. * There are, however, things that need more work: * * - FreeType works in 26.6 mode. Clients can decide to use that mode, and everything * would work fine. However, we also abuse this API for performing in font-space, * but don't pass the correct flags to FreeType. We just abuse the no-hinting mode * for that, such that no rounding etc happens. As such, we don't set ppem, and * pass NO_HINTING as load_flags. Would be much better to use NO_SCALE, and scale ! * ourselves. * * - We don't handle / allow for emboldening / obliqueing. * * - In the future, we should add constructors to create fonts in font space? */ struct hb_ft_font_t { + mutable hb_mutex_t lock; FT_Face ft_face; int load_flags; bool symbol; /* Whether selected cmap is symbol cmap. */ bool unref; /* Whether to destroy ft_face when done. */ + + mutable hb_atomic_int_t cached_x_scale; + mutable hb_advance_cache_t advance_cache; }; static hb_ft_font_t * _hb_ft_font_create (FT_Face ft_face, bool symbol, bool unref) { hb_ft_font_t *ft_font = (hb_ft_font_t *) calloc (1, sizeof (hb_ft_font_t)); if (unlikely (!ft_font)) return nullptr; + ft_font->lock.init (); ft_font->ft_face = ft_face; ft_font->symbol = symbol; ft_font->unref = unref; ft_font->load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING; + ft_font->cached_x_scale.set (0); + ft_font->advance_cache.init (); + return ft_font; } static void _hb_ft_face_destroy (void *data)
*** 96,108 **** --- 111,127 ---- static void _hb_ft_font_destroy (void *data) { hb_ft_font_t *ft_font = (hb_ft_font_t *) data; + ft_font->advance_cache.fini (); + if (ft_font->unref) _hb_ft_face_destroy (ft_font->ft_face); + ft_font->lock.fini (); + free (ft_font); } /** * hb_ft_font_set_load_flags:
*** 114,124 **** * Since: 1.0.5 **/ void hb_ft_font_set_load_flags (hb_font_t *font, int load_flags) { ! if (font->immutable) return; if (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy) return; --- 133,143 ---- * Since: 1.0.5 **/ void hb_ft_font_set_load_flags (hb_font_t *font, int load_flags) { ! if (hb_object_is_immutable (font)) return; if (font->destroy != (hb_destroy_func_t) _hb_ft_font_destroy) return;
*** 166,175 **** --- 185,195 ---- hb_codepoint_t unicode, hb_codepoint_t *glyph, 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); unsigned int g = FT_Get_Char_Index (ft_font->ft_face, unicode); if (unlikely (!g)) { if (unlikely (ft_font->symbol) && unicode <= 0x00FFu)
*** 189,241 **** *glyph = g; return true; } static hb_bool_t hb_ft_get_variation_glyph (hb_font_t *font HB_UNUSED, void *font_data, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph, void *user_data HB_UNUSED) { const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data; unsigned int g = FT_Face_GetCharVariantIndex (ft_font->ft_face, unicode, variation_selector); if (unlikely (!g)) return false; *glyph = g; return true; } ! static hb_position_t ! hb_ft_get_glyph_h_advance (hb_font_t *font, ! void *font_data, ! hb_codepoint_t glyph, void *user_data HB_UNUSED) { const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data; ! FT_Fixed v; ! if (unlikely (FT_Get_Advance (ft_font->ft_face, glyph, ft_font->load_flags, &v))) ! return 0; ! if (font->x_scale < 0) ! v = -v; ! return (v + (1<<9)) >> 10; } static hb_position_t hb_ft_get_glyph_v_advance (hb_font_t *font, void *font_data, hb_codepoint_t glyph, void *user_data HB_UNUSED) { const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data; FT_Fixed v; if (unlikely (FT_Get_Advance (ft_font->ft_face, glyph, ft_font->load_flags | FT_LOAD_VERTICAL_LAYOUT, &v))) return 0; --- 209,312 ---- *glyph = g; return true; } + static unsigned int + hb_ft_get_nominal_glyphs (hb_font_t *font HB_UNUSED, + void *font_data, + unsigned int count, + const hb_codepoint_t *first_unicode, + unsigned int unicode_stride, + hb_codepoint_t *first_glyph, + unsigned int glyph_stride, + 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); + unsigned int done; + for (done = 0; + done < count && (*first_glyph = FT_Get_Char_Index (ft_font->ft_face, *first_unicode)); + done++) + { + first_unicode = &StructAtOffsetUnaligned<hb_codepoint_t> (first_unicode, unicode_stride); + first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); + } + /* We don't need to do ft_font->symbol dance here, since HB calls the singular + * nominal_glyph() for what we don't handle here. */ + return done; + } + + static hb_bool_t hb_ft_get_variation_glyph (hb_font_t *font HB_UNUSED, void *font_data, hb_codepoint_t unicode, hb_codepoint_t variation_selector, hb_codepoint_t *glyph, 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); unsigned int g = FT_Face_GetCharVariantIndex (ft_font->ft_face, unicode, variation_selector); if (unlikely (!g)) return false; *glyph = g; return true; } ! static void ! hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data, ! unsigned count, ! const 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; ! hb_lock_t lock (ft_font->lock); ! FT_Face ft_face = ft_font->ft_face; ! int load_flags = ft_font->load_flags; ! int mult = font->x_scale < 0 ? -1 : +1; ! if (font->x_scale != ft_font->cached_x_scale.get ()) ! { ! ft_font->advance_cache.clear (); ! ft_font->cached_x_scale.set (font->x_scale); ! } ! for (unsigned int i = 0; i < count; i++) ! { ! FT_Fixed v = 0; ! hb_codepoint_t glyph = *first_glyph; ! ! unsigned int cv; ! if (ft_font->advance_cache.get (glyph, &cv)) ! v = cv; ! else ! { ! FT_Get_Advance (ft_face, glyph, load_flags, &v); ! ft_font->advance_cache.set (glyph, v); ! } ! *first_advance = (v * mult + (1<<9)) >> 10; ! first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride); ! first_advance = &StructAtOffsetUnaligned<hb_position_t> (first_advance, advance_stride); ! } } static hb_position_t hb_ft_get_glyph_v_advance (hb_font_t *font, void *font_data, hb_codepoint_t glyph, 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_Fixed v; if (unlikely (FT_Get_Advance (ft_font->ft_face, glyph, ft_font->load_flags | FT_LOAD_VERTICAL_LAYOUT, &v))) return 0;
*** 254,263 **** --- 325,335 ---- hb_position_t *x, hb_position_t *y, 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_font->load_flags))) return false;
*** 272,306 **** *y = -*y; return true; } - static hb_position_t - hb_ft_get_glyph_h_kerning (hb_font_t *font, - void *font_data, - hb_codepoint_t left_glyph, - hb_codepoint_t right_glyph, - void *user_data HB_UNUSED) - { - const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data; - FT_Vector kerningv; - - FT_Kerning_Mode mode = font->x_ppem ? FT_KERNING_DEFAULT : FT_KERNING_UNFITTED; - if (FT_Get_Kerning (ft_font->ft_face, left_glyph, right_glyph, mode, &kerningv)) - return 0; - - return kerningv.x; - } - static hb_bool_t hb_ft_get_glyph_extents (hb_font_t *font, void *font_data, hb_codepoint_t glyph, hb_glyph_extents_t *extents, 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; if (unlikely (FT_Load_Glyph (ft_face, glyph, ft_font->load_flags))) return false; --- 344,362 ---- *y = -*y; return true; } static hb_bool_t hb_ft_get_glyph_extents (hb_font_t *font, void *font_data, hb_codepoint_t glyph, hb_glyph_extents_t *extents, 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_font->load_flags))) return false;
*** 329,338 **** --- 385,395 ---- hb_position_t *x, hb_position_t *y, 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_font->load_flags))) return false;
*** 354,365 **** hb_codepoint_t glyph, char *name, unsigned int size, void *user_data HB_UNUSED) { const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data; ! hb_bool_t ret = !FT_Get_Glyph_Name (ft_font->ft_face, glyph, name, size); if (ret && (size && !*name)) ret = false; return ret; } --- 411,424 ---- hb_codepoint_t glyph, char *name, unsigned int size, 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; ! hb_bool_t ret = !FT_Get_Glyph_Name (ft_face, glyph, name, size); if (ret && (size && !*name)) ret = false; return ret; }
*** 370,379 **** --- 429,439 ---- const char *name, int len, /* -1 means nul-terminated */ hb_codepoint_t *glyph, 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 (len < 0) *glyph = FT_Get_Name_Index (ft_face, (FT_String *) name); else {
*** 402,480 **** void *font_data, hb_font_extents_t *metrics, 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; ! metrics->ascender = ft_face->size->metrics.ascender; ! metrics->descender = ft_face->size->metrics.descender; ! metrics->line_gap = ft_face->size->metrics.height - (ft_face->size->metrics.ascender - ft_face->size->metrics.descender); if (font->y_scale < 0) { metrics->ascender = -metrics->ascender; metrics->descender = -metrics->descender; metrics->line_gap = -metrics->line_gap; } return true; } ! static hb_font_funcs_t *static_ft_funcs = nullptr; ! ! #ifdef HB_USE_ATEXIT ! static ! void free_static_ft_funcs (void) ! { ! retry: ! hb_font_funcs_t *ft_funcs = (hb_font_funcs_t *) hb_atomic_ptr_get (&static_ft_funcs); ! if (!hb_atomic_ptr_cmpexch (&static_ft_funcs, ft_funcs, nullptr)) ! goto retry; ! ! hb_font_funcs_destroy (ft_funcs); ! } #endif ! static void ! _hb_ft_font_set_funcs (hb_font_t *font, FT_Face ft_face, bool unref) { ! retry: ! hb_font_funcs_t *funcs = (hb_font_funcs_t *) hb_atomic_ptr_get (&static_ft_funcs); ! ! if (unlikely (!funcs)) { ! funcs = hb_font_funcs_create (); hb_font_funcs_set_font_h_extents_func (funcs, hb_ft_get_font_h_extents, nullptr, nullptr); //hb_font_funcs_set_font_v_extents_func (funcs, hb_ft_get_font_v_extents, nullptr, nullptr); 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_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); - hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ft_get_glyph_h_kerning, nullptr, nullptr); - //hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ft_get_glyph_v_kerning, nullptr, nullptr); hb_font_funcs_set_glyph_extents_func (funcs, hb_ft_get_glyph_extents, nullptr, nullptr); hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ft_get_glyph_contour_point, nullptr, nullptr); 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); hb_font_funcs_make_immutable (funcs); ! if (!hb_atomic_ptr_cmpexch (&static_ft_funcs, nullptr, funcs)) { ! hb_font_funcs_destroy (funcs); ! goto retry; } ! #ifdef HB_USE_ATEXIT ! atexit (free_static_ft_funcs); /* First person registers atexit() callback. */ #endif - }; bool symbol = ft_face->charmap && ft_face->charmap->encoding == FT_ENCODING_MS_SYMBOL; hb_font_set_funcs (font, ! funcs, _hb_ft_font_create (ft_face, symbol, unref), _hb_ft_font_destroy); } --- 462,540 ---- void *font_data, hb_font_extents_t *metrics, 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; ! metrics->ascender = FT_MulFix(ft_face->ascender, ft_face->size->metrics.y_scale); ! metrics->descender = FT_MulFix(ft_face->descender, ft_face->size->metrics.y_scale); ! metrics->line_gap = FT_MulFix( ft_face->height, ft_face->size->metrics.y_scale ) - (metrics->ascender - metrics->descender); if (font->y_scale < 0) { metrics->ascender = -metrics->ascender; metrics->descender = -metrics->descender; metrics->line_gap = -metrics->line_gap; } return true; } ! #if HB_USE_ATEXIT ! static void free_static_ft_funcs (); #endif ! static struct hb_ft_font_funcs_lazy_loader_t : hb_font_funcs_lazy_loader_t<hb_ft_font_funcs_lazy_loader_t> { ! static hb_font_funcs_t *create () { ! hb_font_funcs_t *funcs = hb_font_funcs_create (); hb_font_funcs_set_font_h_extents_func (funcs, hb_ft_get_font_h_extents, nullptr, nullptr); //hb_font_funcs_set_font_v_extents_func (funcs, hb_ft_get_font_v_extents, nullptr, nullptr); hb_font_funcs_set_nominal_glyph_func (funcs, hb_ft_get_nominal_glyph, nullptr, nullptr); + hb_font_funcs_set_nominal_glyphs_func (funcs, hb_ft_get_nominal_glyphs, nullptr, nullptr); hb_font_funcs_set_variation_glyph_func (funcs, hb_ft_get_variation_glyph, 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); hb_font_funcs_set_glyph_extents_func (funcs, hb_ft_get_glyph_extents, nullptr, nullptr); hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ft_get_glyph_contour_point, nullptr, nullptr); 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); hb_font_funcs_make_immutable (funcs); ! #if HB_USE_ATEXIT ! atexit (free_static_ft_funcs); ! #endif ! ! return funcs; } + } static_ft_funcs; ! #if HB_USE_ATEXIT ! static ! void free_static_ft_funcs () ! { ! static_ft_funcs.free_instance (); ! } #endif + static hb_font_funcs_t * + _hb_ft_get_font_funcs () + { + return static_ft_funcs.get_unconst (); + } + + static void + _hb_ft_font_set_funcs (hb_font_t *font, FT_Face ft_face, bool unref) + { bool symbol = ft_face->charmap && ft_face->charmap->encoding == FT_ENCODING_MS_SYMBOL; hb_font_set_funcs (font, ! _hb_ft_get_font_funcs (), _hb_ft_font_create (ft_face, symbol, unref), _hb_ft_font_destroy); }
*** 495,505 **** buffer = (FT_Byte *) malloc (length); if (!buffer) return nullptr; error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length); ! if (error) { free (buffer); return nullptr; } return hb_blob_create ((const char *) buffer, length, --- 555,566 ---- buffer = (FT_Byte *) malloc (length); if (!buffer) return nullptr; error = FT_Load_Sfnt_Table (ft_face, tag, 0, buffer, &length); ! if (error) ! { free (buffer); return nullptr; } return hb_blob_create ((const char *) buffer, length,
*** 681,731 **** { FT_Reference_Face (ft_face); return hb_ft_font_create (ft_face, _hb_ft_face_destroy); } ! /* Thread-safe, lock-free, FT_Library */ ! ! static FT_Library ft_library; ! ! #ifdef HB_USE_ATEXIT ! static ! void free_ft_library (void) { ! retry: ! FT_Library library = (FT_Library) hb_atomic_ptr_get (&ft_library); ! if (!hb_atomic_ptr_cmpexch (&ft_library, library, nullptr)) ! goto retry; ! FT_Done_FreeType (library); ! } #endif ! static FT_Library ! get_ft_library (void) ! { ! retry: ! FT_Library library = (FT_Library) hb_atomic_ptr_get (&ft_library); ! ! if (unlikely (!library)) { - /* Not found; allocate one. */ - if (FT_Init_FreeType (&library)) return nullptr; - - if (!hb_atomic_ptr_cmpexch (&ft_library, nullptr, library)) { - FT_Done_FreeType (library); - goto retry; } ! #ifdef HB_USE_ATEXIT ! atexit (free_ft_library); /* First person registers atexit() callback. */ #endif - } ! return library; } static void _release_blob (FT_Face ft_face) { --- 742,792 ---- { FT_Reference_Face (ft_face); return hb_ft_font_create (ft_face, _hb_ft_face_destroy); } + #if HB_USE_ATEXIT + static void free_static_ft_library (); + #endif ! static struct hb_ft_library_lazy_loader_t : hb_lazy_loader_t<hb_remove_pointer (FT_Library), ! hb_ft_library_lazy_loader_t> { ! static FT_Library create () ! { ! FT_Library l; ! if (FT_Init_FreeType (&l)) ! return nullptr; ! #if HB_USE_ATEXIT ! atexit (free_static_ft_library); #endif ! return l; ! } ! static void destroy (FT_Library l) ! { ! FT_Done_FreeType (l); ! } ! static FT_Library get_null () { return nullptr; } + } static_ft_library; ! #if HB_USE_ATEXIT ! static ! void free_static_ft_library () ! { ! static_ft_library.free_instance (); ! } #endif ! static FT_Library ! get_ft_library () ! { ! return static_ft_library.get_unconst (); } static void _release_blob (FT_Face ft_face) {
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