diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh | 403 |
1 files changed, 265 insertions, 138 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh index c5ba8b4b4d..0a0a54b25d 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-layout-private.hh @@ -1,6 +1,6 @@ /* * Copyright © 2007,2008,2009 Red Hat, Inc. - * Copyright © 2012 Google, Inc. + * Copyright © 2012,2013 Google, Inc. * * This is part of HarfBuzz, a text shaping library. * @@ -31,47 +31,184 @@ #include "hb-private.hh" -#include "hb-ot-layout.h" - #include "hb-font-private.hh" #include "hb-buffer-private.hh" #include "hb-set-private.hh" -/* buffer var allocations, used during the GSUB/GPOS processing */ -#define glyph_props() var1.u16[0] /* GDEF glyph properties */ -#define syllable() var1.u8[2] /* GSUB/GPOS shaping boundaries */ -#define lig_props() var1.u8[3] /* GSUB/GPOS ligature tracking */ +/* + * GDEF + */ + +typedef enum +{ + /* The following three match LookupFlags::Ignore* numbers. */ + HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u, + HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u, + HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u, + + /* The following are used internally; not derived from GDEF. */ + HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u, + HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u, + + HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED | + HB_OT_LAYOUT_GLYPH_PROPS_LIGATED +} hb_ot_layout_glyph_class_mask_t; + + +/* + * GSUB/GPOS + */ + +HB_INTERNAL hb_bool_t +hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face, + unsigned int lookup_index, + const hb_codepoint_t *glyphs, + unsigned int glyphs_length, + hb_bool_t zero_context); + + +/* Should be called before all the substitute_lookup's are done. */ +HB_INTERNAL void +hb_ot_layout_substitute_start (hb_font_t *font, + hb_buffer_t *buffer); + + +struct hb_ot_layout_lookup_accelerator_t; + +namespace OT { + struct hb_apply_context_t; + struct SubstLookup; +} + +HB_INTERNAL void +hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c, + const OT::SubstLookup &lookup, + const hb_ot_layout_lookup_accelerator_t &accel); + + +/* Should be called after all the substitute_lookup's are done */ +HB_INTERNAL void +hb_ot_layout_substitute_finish (hb_font_t *font, + hb_buffer_t *buffer); + + +/* Should be called before all the position_lookup's are done. Resets positions to zero. */ +HB_INTERNAL void +hb_ot_layout_position_start (hb_font_t *font, + hb_buffer_t *buffer); + +/* Should be called after all the position_lookup's are done */ +HB_INTERNAL void +hb_ot_layout_position_finish (hb_font_t *font, + hb_buffer_t *buffer); + + + +/* + * hb_ot_layout_t + */ + +namespace OT { + struct GDEF; + struct GSUB; + struct GPOS; +} + +struct hb_ot_layout_lookup_accelerator_t +{ + template <typename TLookup> + inline void init (const TLookup &lookup) + { + digest.init (); + lookup.add_coverage (&digest); + } + + template <typename TLookup> + inline void fini (const TLookup &lookup) + { + } + + hb_set_digest_t digest; +}; + +struct hb_ot_layout_t +{ + hb_blob_t *gdef_blob; + hb_blob_t *gsub_blob; + hb_blob_t *gpos_blob; + + const struct OT::GDEF *gdef; + const struct OT::GSUB *gsub; + const struct OT::GPOS *gpos; + + unsigned int gsub_lookup_count; + unsigned int gpos_lookup_count; + + hb_ot_layout_lookup_accelerator_t *gsub_accels; + hb_ot_layout_lookup_accelerator_t *gpos_accels; +}; + + +HB_INTERNAL hb_ot_layout_t * +_hb_ot_layout_create (hb_face_t *face); + +HB_INTERNAL void +_hb_ot_layout_destroy (hb_ot_layout_t *layout); + + +#define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot) + + +/* + * Buffer var routines. + */ /* buffer var allocations, used during the entire shaping process */ #define unicode_props0() var2.u8[0] #define unicode_props1() var2.u8[1] +/* buffer var allocations, used during the GSUB/GPOS processing */ +#define glyph_props() var1.u16[0] /* GDEF glyph properties */ +#define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */ +#define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */ + +/* unicode_props */ + +enum { + MASK0_ZWJ = 0x20u, + MASK0_ZWNJ = 0x40u, + MASK0_IGNORABLE = 0x80u, + MASK0_GEN_CAT = 0x1Fu +}; inline void _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode) { + /* XXX This shouldn't be inlined, or at least not while is_default_ignorable() is inline. */ info->unicode_props0() = ((unsigned int) unicode->general_category (info->codepoint)) | - (unicode->is_default_ignorable (info->codepoint) ? 0x80 : 0) | - (info->codepoint == 0x200C ? 0x40 : 0) | - (info->codepoint == 0x200D ? 0x20 : 0); + (unicode->is_default_ignorable (info->codepoint) ? MASK0_IGNORABLE : 0) | + (info->codepoint == 0x200C ? MASK0_ZWNJ : 0) | + (info->codepoint == 0x200D ? MASK0_ZWJ : 0); info->unicode_props1() = unicode->modified_combining_class (info->codepoint); } inline void -_hb_glyph_info_set_general_category (hb_glyph_info_t *info, hb_unicode_general_category_t gen_cat) +_hb_glyph_info_set_general_category (hb_glyph_info_t *info, + hb_unicode_general_category_t gen_cat) { - info->unicode_props0() = (unsigned int) gen_cat | ((info->unicode_props0()) & ~0x1F); + info->unicode_props0() = (unsigned int) gen_cat | ((info->unicode_props0()) & ~MASK0_GEN_CAT); } inline hb_unicode_general_category_t _hb_glyph_info_get_general_category (const hb_glyph_info_t *info) { - return (hb_unicode_general_category_t) (info->unicode_props0() & 0x1F); + return (hb_unicode_general_category_t) (info->unicode_props0() & MASK0_GEN_CAT); } inline void -_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, unsigned int modified_class) +_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info, + unsigned int modified_class) { info->unicode_props1() = modified_class; } @@ -85,43 +222,28 @@ _hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info) inline hb_bool_t _hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info) { - return !!(info->unicode_props0() & 0x80); + return !!(info->unicode_props0() & MASK0_IGNORABLE); } inline hb_bool_t _hb_glyph_info_is_zwnj (const hb_glyph_info_t *info) { - return !!(info->unicode_props0() & 0x40); + return !!(info->unicode_props0() & MASK0_ZWNJ); } inline hb_bool_t _hb_glyph_info_is_zwj (const hb_glyph_info_t *info) { - return !!(info->unicode_props0() & 0x20); + return !!(info->unicode_props0() & MASK0_ZWJ); } +inline void +_hb_glyph_info_flip_joiners (hb_glyph_info_t *info) +{ + info->unicode_props0() ^= MASK0_ZWNJ | MASK0_ZWJ; +} -#define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot) - -/* - * GDEF - */ - -typedef enum { - HB_OT_LAYOUT_GLYPH_PROPS_UNCLASSIFIED = 1 << HB_OT_LAYOUT_GLYPH_CLASS_UNCLASSIFIED, - HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 1 << HB_OT_LAYOUT_GLYPH_CLASS_BASE_GLYPH, - HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 1 << HB_OT_LAYOUT_GLYPH_CLASS_LIGATURE, - HB_OT_LAYOUT_GLYPH_PROPS_MARK = 1 << HB_OT_LAYOUT_GLYPH_CLASS_MARK, - HB_OT_LAYOUT_GLYPH_PROPS_COMPONENT = 1 << HB_OT_LAYOUT_GLYPH_CLASS_COMPONENT -} hb_ot_layout_glyph_class_mask_t; - - - -/* - * GSUB/GPOS - */ - -/* lig_id / lig_comp +/* lig_props: aka lig_id / lig_comp * * When a ligature is formed: * @@ -131,7 +253,9 @@ typedef enum { * - The marks get lig_comp > 0, reflecting which component of the ligature * they were applied to. * - This is used in GPOS to attach marks to the right component of a ligature - * in MarkLigPos. + * in MarkLigPos, + * - Note that when marks are ligated together, much of the above is skipped + * and the current lig_id reused. * * When a multiple-substitution is done: * @@ -141,156 +265,159 @@ typedef enum { * multiple substitution in MarkBasePos. * * The numbers are also used in GPOS to do mark-to-mark positioning only - * to marks that belong to the same component of a ligature in MarkMarPos. + * to marks that belong to the same component of the same ligature. */ + +static inline void +_hb_glyph_info_clear_lig_props (hb_glyph_info_t *info) +{ + info->lig_props() = 0; +} + #define IS_LIG_BASE 0x10 + static inline void -set_lig_props_for_ligature (hb_glyph_info_t &info, unsigned int lig_id, unsigned int lig_num_comps) +_hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info, + unsigned int lig_id, + unsigned int lig_num_comps) { - info.lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); + info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F); } + static inline void -set_lig_props_for_mark (hb_glyph_info_t &info, unsigned int lig_id, unsigned int lig_comp) +_hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info, + unsigned int lig_id, + unsigned int lig_comp) { - info.lig_props() = (lig_id << 5) | (lig_comp & 0x0F); + info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F); } + static inline void -set_lig_props_for_component (hb_glyph_info_t &info, unsigned int comp) +_hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp) { - set_lig_props_for_mark (info, 0, comp); + _hb_glyph_info_set_lig_props_for_mark (info, 0, comp); } static inline unsigned int -get_lig_id (const hb_glyph_info_t &info) +_hb_glyph_info_get_lig_id (const hb_glyph_info_t *info) { - return info.lig_props() >> 5; + return info->lig_props() >> 5; } + static inline bool -is_a_ligature (const hb_glyph_info_t &info) +_hb_glyph_info_ligated_internal (const hb_glyph_info_t *info) { - return !!(info.lig_props() & IS_LIG_BASE); + return !!(info->lig_props() & IS_LIG_BASE); } + static inline unsigned int -get_lig_comp (const hb_glyph_info_t &info) +_hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info) { - if (is_a_ligature (info)) + if (_hb_glyph_info_ligated_internal (info)) return 0; else - return info.lig_props() & 0x0F; + return info->lig_props() & 0x0F; } + static inline unsigned int -get_lig_num_comps (const hb_glyph_info_t &info) +_hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info) { - if ((info.glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && is_a_ligature (info)) - return info.lig_props() & 0x0F; + if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && + _hb_glyph_info_ligated_internal (info)) + return info->lig_props() & 0x0F; else return 1; } -static inline uint8_t allocate_lig_id (hb_buffer_t *buffer) { +static inline uint8_t +_hb_allocate_lig_id (hb_buffer_t *buffer) { uint8_t lig_id = buffer->next_serial () & 0x07; if (unlikely (!lig_id)) - lig_id = allocate_lig_id (buffer); /* in case of overflow */ + lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */ return lig_id; } +/* glyph_props: */ -HB_INTERNAL hb_bool_t -hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face, - unsigned int lookup_index, - const hb_codepoint_t *glyphs, - unsigned int glyphs_length, - hb_bool_t zero_context); - - -/* Should be called before all the substitute_lookup's are done. */ -HB_INTERNAL void -hb_ot_layout_substitute_start (hb_font_t *font, - hb_buffer_t *buffer); - - -struct hb_ot_layout_lookup_accelerator_t; - -namespace OT { - struct hb_apply_context_t; - struct SubstLookup; +inline void +_hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props) +{ + info->glyph_props() = props; } -HB_INTERNAL void -hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c, - const OT::SubstLookup &lookup, - const hb_ot_layout_lookup_accelerator_t &accel); - - -/* Should be called after all the substitute_lookup's are done */ -HB_INTERNAL void -hb_ot_layout_substitute_finish (hb_font_t *font, - hb_buffer_t *buffer); - - -/* Should be called before all the position_lookup's are done. Resets positions to zero. */ -HB_INTERNAL void -hb_ot_layout_position_start (hb_font_t *font, - hb_buffer_t *buffer); - -/* Should be called after all the position_lookup's are done */ -HB_INTERNAL void -hb_ot_layout_position_finish (hb_font_t *font, - hb_buffer_t *buffer); - - - -/* - * hb_ot_layout_t - */ - -namespace OT { - struct GDEF; - struct GSUB; - struct GPOS; +inline unsigned int +_hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info) +{ + return info->glyph_props(); } -struct hb_ot_layout_lookup_accelerator_t +inline bool +_hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info) { - template <typename TLookup> - inline void init (const TLookup &lookup) - { - digest.init (); - lookup.add_coverage (&digest); - } + return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH); +} - template <typename TLookup> - inline void fini (const TLookup &lookup) - { - } +inline bool +_hb_glyph_info_is_ligature (const hb_glyph_info_t *info) +{ + return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE); +} - hb_set_digest_t digest; -}; +inline bool +_hb_glyph_info_is_mark (const hb_glyph_info_t *info) +{ + return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK); +} -struct hb_ot_layout_t +static inline bool +_hb_glyph_info_substituted (const hb_glyph_info_t *info) { - hb_blob_t *gdef_blob; - hb_blob_t *gsub_blob; - hb_blob_t *gpos_blob; + return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED); +} - const struct OT::GDEF *gdef; - const struct OT::GSUB *gsub; - const struct OT::GPOS *gpos; +static inline bool +_hb_glyph_info_ligated (const hb_glyph_info_t *info) +{ + return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED); +} - unsigned int gsub_lookup_count; - unsigned int gpos_lookup_count; +/* Allocation / deallocation. */ - hb_ot_layout_lookup_accelerator_t *gsub_accels; - hb_ot_layout_lookup_accelerator_t *gpos_accels; -}; +inline void +_hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer) +{ + HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props0); + HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props1); +} +inline void +_hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer) +{ + HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props0); + HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props1); +} -HB_INTERNAL hb_ot_layout_t * -_hb_ot_layout_create (hb_face_t *face); +inline void +_hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer) +{ + HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props); + HB_BUFFER_ALLOCATE_VAR (buffer, lig_props); + HB_BUFFER_ALLOCATE_VAR (buffer, syllable); +} -HB_INTERNAL void -_hb_ot_layout_destroy (hb_ot_layout_t *layout); +inline void +_hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer) +{ + HB_BUFFER_DEALLOCATE_VAR (buffer, syllable); + HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props); + HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props); +} +/* Make sure no one directly touches our props... */ +#undef unicode_props0 +#undef unicode_props1 +#undef lig_props +#undef glyph_props #endif /* HB_OT_LAYOUT_PRIVATE_HH */ |