diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-buffer.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-buffer.hh | 420 |
1 files changed, 307 insertions, 113 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-buffer.hh b/src/3rdparty/harfbuzz-ng/src/hb-buffer.hh index 8b432b5f96..f04ad58f11 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-buffer.hh +++ b/src/3rdparty/harfbuzz-ng/src/hb-buffer.hh @@ -32,31 +32,13 @@ #include "hb.hh" #include "hb-unicode.hh" +#include "hb-set-digest.hh" -#ifndef HB_BUFFER_MAX_LEN_FACTOR -#define HB_BUFFER_MAX_LEN_FACTOR 64 -#endif -#ifndef HB_BUFFER_MAX_LEN_MIN -#define HB_BUFFER_MAX_LEN_MIN 16384 -#endif -#ifndef HB_BUFFER_MAX_LEN_DEFAULT -#define HB_BUFFER_MAX_LEN_DEFAULT 0x3FFFFFFF /* Shaping more than a billion chars? Let us know! */ -#endif - -#ifndef HB_BUFFER_MAX_OPS_FACTOR -#define HB_BUFFER_MAX_OPS_FACTOR 1024 -#endif -#ifndef HB_BUFFER_MAX_OPS_MIN -#define HB_BUFFER_MAX_OPS_MIN 16384 -#endif -#ifndef HB_BUFFER_MAX_OPS_DEFAULT -#define HB_BUFFER_MAX_OPS_DEFAULT 0x1FFFFFFF /* Shaping more than a billion operations? Let us know! */ -#endif - static_assert ((sizeof (hb_glyph_info_t) == 20), ""); static_assert ((sizeof (hb_glyph_info_t) == sizeof (hb_glyph_position_t)), ""); +HB_MARK_AS_FLAG_T (hb_glyph_flags_t); HB_MARK_AS_FLAG_T (hb_buffer_flags_t); HB_MARK_AS_FLAG_T (hb_buffer_serialize_flags_t); HB_MARK_AS_FLAG_T (hb_buffer_diff_flags_t); @@ -67,14 +49,15 @@ enum hb_buffer_scratch_flags_t { HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES = 0x00000002u, HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK = 0x00000004u, HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT = 0x00000008u, - HB_BUFFER_SCRATCH_FLAG_HAS_UNSAFE_TO_BREAK = 0x00000010u, - HB_BUFFER_SCRATCH_FLAG_HAS_CGJ = 0x00000020u, - - /* Reserved for complex shapers' internal use. */ - HB_BUFFER_SCRATCH_FLAG_COMPLEX0 = 0x01000000u, - HB_BUFFER_SCRATCH_FLAG_COMPLEX1 = 0x02000000u, - HB_BUFFER_SCRATCH_FLAG_COMPLEX2 = 0x04000000u, - HB_BUFFER_SCRATCH_FLAG_COMPLEX3 = 0x08000000u, + HB_BUFFER_SCRATCH_FLAG_HAS_CGJ = 0x00000010u, + HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS = 0x00000020u, + HB_BUFFER_SCRATCH_FLAG_HAS_BROKEN_SYLLABLE = 0x00000040u, + + /* Reserved for shapers' internal use. */ + HB_BUFFER_SCRATCH_FLAG_SHAPER0 = 0x01000000u, + HB_BUFFER_SCRATCH_FLAG_SHAPER1 = 0x02000000u, + HB_BUFFER_SCRATCH_FLAG_SHAPER2 = 0x04000000u, + HB_BUFFER_SCRATCH_FLAG_SHAPER3 = 0x08000000u, }; HB_MARK_AS_FLAG_T (hb_buffer_scratch_flags_t); @@ -87,35 +70,38 @@ struct hb_buffer_t { hb_object_header_t header; - /* Information about how the text in the buffer should be treated */ + /* + * Information about how the text in the buffer should be treated. + */ + hb_unicode_funcs_t *unicode; /* Unicode functions */ hb_buffer_flags_t flags; /* BOT / EOT / etc. */ hb_buffer_cluster_level_t cluster_level; hb_codepoint_t replacement; /* U+FFFD or something else. */ hb_codepoint_t invisible; /* 0 or something else. */ - hb_buffer_scratch_flags_t scratch_flags; /* Have space-fallback, etc. */ - unsigned int max_len; /* Maximum allowed len. */ - int max_ops; /* Maximum allowed operations. */ + hb_codepoint_t not_found; /* 0 or something else. */ + + /* + * Buffer contents + */ - /* Buffer contents */ hb_buffer_content_type_t content_type; hb_segment_properties_t props; /* Script, language, direction */ bool successful; /* Allocations successful */ + bool shaping_failed; /* Shaping failure */ bool have_output; /* Whether we have an output buffer going on */ bool have_positions; /* Whether we have positions */ unsigned int idx; /* Cursor into ->info and ->pos arrays */ unsigned int len; /* Length of ->info and ->pos arrays */ - unsigned int out_len; /* Length of ->out array if have_output */ + unsigned int out_len; /* Length of ->out_info array if have_output */ unsigned int allocated; /* Length of allocated arrays */ hb_glyph_info_t *info; hb_glyph_info_t *out_info; hb_glyph_position_t *pos; - unsigned int serial; - /* Text before / after the main buffer contents. * Always in Unicode, and ordered outward. * Index 0 is for "pre-context", 1 for "post-context". */ @@ -123,18 +109,32 @@ struct hb_buffer_t hb_codepoint_t context[2][CONTEXT_LENGTH]; unsigned int context_len[2]; - /* Debugging API */ + + /* + * Managed by enter / leave + */ + + uint8_t allocated_var_bits; + uint8_t serial; + hb_buffer_scratch_flags_t scratch_flags; /* Have space-fallback, etc. */ + unsigned int max_len; /* Maximum allowed len. */ + int max_ops; /* Maximum allowed operations. */ + /* The bits here reflect current allocations of the bytes in glyph_info_t's var1 and var2. */ + + + /* + * Messaging callback + */ + #ifndef HB_NO_BUFFER_MESSAGE hb_buffer_message_func_t message_func; void *message_data; hb_destroy_func_t message_destroy; + unsigned message_depth; /* How deeply are we inside a message callback? */ +#else + static constexpr unsigned message_depth = 0u; #endif - /* Internal debugging. */ - /* The bits here reflect current allocations of the bytes in glyph_info_t's var1 and var2. */ -#ifndef HB_NDEBUG - uint8_t allocated_var_bits; -#endif /* Methods */ @@ -143,38 +143,40 @@ struct hb_buffer_t void allocate_var (unsigned int start, unsigned int count) { -#ifndef HB_NDEBUG unsigned int end = start + count; assert (end <= 8); unsigned int bits = (1u<<end) - (1u<<start); assert (0 == (allocated_var_bits & bits)); allocated_var_bits |= bits; -#endif + } + bool try_allocate_var (unsigned int start, unsigned int count) + { + unsigned int end = start + count; + assert (end <= 8); + unsigned int bits = (1u<<end) - (1u<<start); + if (allocated_var_bits & bits) + return false; + allocated_var_bits |= bits; + return true; } void deallocate_var (unsigned int start, unsigned int count) { -#ifndef HB_NDEBUG unsigned int end = start + count; assert (end <= 8); unsigned int bits = (1u<<end) - (1u<<start); assert (bits == (allocated_var_bits & bits)); allocated_var_bits &= ~bits; -#endif } void assert_var (unsigned int start, unsigned int count) { -#ifndef HB_NDEBUG unsigned int end = start + count; assert (end <= 8); - unsigned int bits = (1u<<end) - (1u<<start); + HB_UNUSED unsigned int bits = (1u<<end) - (1u<<start); assert (bits == (allocated_var_bits & bits)); -#endif } void deallocate_var_all () { -#ifndef HB_NDEBUG allocated_var_bits = 0; -#endif } hb_glyph_info_t &cur (unsigned int i = 0) { return info[idx + i]; } @@ -186,27 +188,97 @@ struct hb_buffer_t hb_glyph_info_t &prev () { return out_info[out_len ? out_len - 1 : 0]; } hb_glyph_info_t prev () const { return out_info[out_len ? out_len - 1 : 0]; } - HB_NODISCARD bool has_separate_output () const { return info != out_info; } - + hb_set_digest_t digest () const + { + hb_set_digest_t d; + d.init (); + d.add_array (&info[0].codepoint, len, sizeof (info[0])); + return d; + } + HB_INTERNAL void similar (const hb_buffer_t &src); HB_INTERNAL void reset (); HB_INTERNAL void clear (); - unsigned int backtrack_len () const { return have_output? out_len : idx; } + /* Called around shape() */ + HB_INTERNAL void enter (); + HB_INTERNAL void leave (); + +#ifndef HB_NO_BUFFER_VERIFY + HB_INTERNAL +#endif + bool verify (hb_buffer_t *text_buffer, + hb_font_t *font, + const hb_feature_t *features, + unsigned int num_features, + const char * const *shapers) +#ifndef HB_NO_BUFFER_VERIFY + ; +#else + { return true; } +#endif + + unsigned int backtrack_len () const { return have_output ? out_len : idx; } unsigned int lookahead_len () const { return len - idx; } - unsigned int next_serial () { return serial++; } + uint8_t next_serial () { return ++serial ? serial : ++serial; } HB_INTERNAL void add (hb_codepoint_t codepoint, unsigned int cluster); HB_INTERNAL void add_info (const hb_glyph_info_t &glyph_info); - HB_INTERNAL void reverse_range (unsigned int start, unsigned int end); - HB_INTERNAL void reverse (); - HB_INTERNAL void reverse_clusters (); + void reverse_range (unsigned start, unsigned end) + { + hb_array_t<hb_glyph_info_t> (info, len).reverse (start, end); + if (have_positions) + hb_array_t<hb_glyph_position_t> (pos, len).reverse (start, end); + } + void reverse () { reverse_range (0, len); } + + template <typename FuncType> + void reverse_groups (const FuncType& group, + bool merge_clusters = false) + { + if (unlikely (!len)) + return; + + unsigned start = 0; + unsigned i; + for (i = 1; i < len; i++) + { + if (!group (info[i - 1], info[i])) + { + if (merge_clusters) + this->merge_clusters (start, i); + reverse_range (start, i); + start = i; + } + } + if (merge_clusters) + this->merge_clusters (start, i); + reverse_range (start, i); + + reverse (); + } + + template <typename FuncType> + unsigned group_end (unsigned start, const FuncType& group) const + { + while (++start < len && group (info[start - 1], info[start])) + ; + + return start; + } + + static bool _cluster_group_func (const hb_glyph_info_t& a, + const hb_glyph_info_t& b) + { return a.cluster == b.cluster; } + + void reverse_clusters () { reverse_groups (_cluster_group_func); } + HB_INTERNAL void guess_segment_properties (); - HB_INTERNAL void swap_buffers (); - HB_INTERNAL void remove_output (); + HB_INTERNAL bool sync (); + HB_INTERNAL int sync_so_far (); HB_INTERNAL void clear_output (); HB_INTERNAL void clear_positions (); @@ -319,16 +391,107 @@ struct hb_buffer_t HB_INTERNAL void merge_out_clusters (unsigned int start, unsigned int end); /* Merge clusters for deleting current glyph, and skip it. */ HB_INTERNAL void delete_glyph (); + HB_INTERNAL void delete_glyphs_inplace (bool (*filter) (const hb_glyph_info_t *info)); + - void unsafe_to_break (unsigned int start, - unsigned int end) + + /* Adds glyph flags in mask to infos with clusters between start and end. + * The start index will be from out-buffer if from_out_buffer is true. + * If interior is true, then the cluster having the minimum value is skipped. */ + void _set_glyph_flags (hb_mask_t mask, + unsigned start = 0, + unsigned end = (unsigned) -1, + bool interior = false, + bool from_out_buffer = false) { - if (end - start < 2) + end = hb_min (end, len); + + if (interior && !from_out_buffer && end - start < 2) + return; + + scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS; + + if (!from_out_buffer || !have_output) + { + if (!interior) + { + for (unsigned i = start; i < end; i++) + info[i].mask |= mask; + } + else + { + unsigned cluster = _infos_find_min_cluster (info, start, end); + _infos_set_glyph_flags (info, start, end, cluster, mask); + } + } + else + { + assert (start <= out_len); + assert (idx <= end); + + if (!interior) + { + for (unsigned i = start; i < out_len; i++) + out_info[i].mask |= mask; + for (unsigned i = idx; i < end; i++) + info[i].mask |= mask; + } + else + { + unsigned cluster = _infos_find_min_cluster (info, idx, end); + cluster = _infos_find_min_cluster (out_info, start, out_len, cluster); + + _infos_set_glyph_flags (out_info, start, out_len, cluster, mask); + _infos_set_glyph_flags (info, idx, end, cluster, mask); + } + } + } + + void unsafe_to_break (unsigned int start = 0, unsigned int end = -1) + { + _set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_BREAK | HB_GLYPH_FLAG_UNSAFE_TO_CONCAT, + start, end, + true); + } + void safe_to_insert_tatweel (unsigned int start = 0, unsigned int end = -1) + { + if ((flags & HB_BUFFER_FLAG_PRODUCE_SAFE_TO_INSERT_TATWEEL) == 0) + { + unsafe_to_break (start, end); + return; + } + _set_glyph_flags (HB_GLYPH_FLAG_SAFE_TO_INSERT_TATWEEL, + start, end, + true); + } +#ifndef HB_OPTIMIZE_SIZE + HB_ALWAYS_INLINE +#endif + void unsafe_to_concat (unsigned int start = 0, unsigned int end = -1) + { + if (likely ((flags & HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT) == 0)) return; - unsafe_to_break_impl (start, end); + _set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_CONCAT, + start, end, + false); + } + void unsafe_to_break_from_outbuffer (unsigned int start = 0, unsigned int end = -1) + { + _set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_BREAK | HB_GLYPH_FLAG_UNSAFE_TO_CONCAT, + start, end, + true, true); + } +#ifndef HB_OPTIMIZE_SIZE + HB_ALWAYS_INLINE +#endif + void unsafe_to_concat_from_outbuffer (unsigned int start = 0, unsigned int end = -1) + { + if (likely ((flags & HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT) == 0)) + return; + _set_glyph_flags (HB_GLYPH_FLAG_UNSAFE_TO_CONCAT, + start, end, + false, true); } - HB_INTERNAL void unsafe_to_break_impl (unsigned int start, unsigned int end); - HB_INTERNAL void unsafe_to_break_from_outbuffer (unsigned int start, unsigned int end); /* Internal methods */ @@ -336,6 +499,13 @@ struct hb_buffer_t HB_NODISCARD HB_INTERNAL bool enlarge (unsigned int size); + HB_NODISCARD bool resize (unsigned length) + { + assert (!have_output); + if (unlikely (!ensure (length))) return false; + len = length; + return true; + } HB_NODISCARD bool ensure (unsigned int size) { return likely (!size || size < allocated) ? true : enlarge (size); } @@ -396,14 +566,16 @@ struct hb_buffer_t bool message (hb_font_t *font, const char *fmt, ...) HB_PRINTF_FUNC(3, 4) { #ifdef HB_NO_BUFFER_MESSAGE - return true; + return true; #else - if (!messaging ()) + if (likely (!messaging ())) return true; + va_list ap; va_start (ap, fmt); bool ret = message_impl (font, fmt, ap); va_end (ap); + return ret; #endif } @@ -413,75 +585,97 @@ struct hb_buffer_t set_cluster (hb_glyph_info_t &inf, unsigned int cluster, unsigned int mask = 0) { if (inf.cluster != cluster) - { - if (mask & HB_GLYPH_FLAG_UNSAFE_TO_BREAK) - inf.mask |= HB_GLYPH_FLAG_UNSAFE_TO_BREAK; - else - inf.mask &= ~HB_GLYPH_FLAG_UNSAFE_TO_BREAK; - } + inf.mask = (inf.mask & ~HB_GLYPH_FLAG_DEFINED) | (mask & HB_GLYPH_FLAG_DEFINED); inf.cluster = cluster; } - - unsigned int - _unsafe_to_break_find_min_cluster (const hb_glyph_info_t *infos, - unsigned int start, unsigned int end, - unsigned int cluster) const - { - for (unsigned int i = start; i < end; i++) - cluster = hb_min (cluster, infos[i].cluster); - return cluster; - } void - _unsafe_to_break_set_mask (hb_glyph_info_t *infos, - unsigned int start, unsigned int end, - unsigned int cluster) + _infos_set_glyph_flags (hb_glyph_info_t *infos, + unsigned int start, unsigned int end, + unsigned int cluster, + hb_mask_t mask) { - for (unsigned int i = start; i < end; i++) - if (cluster != infos[i].cluster) + if (unlikely (start == end)) + return; + + unsigned cluster_first = infos[start].cluster; + unsigned cluster_last = infos[end - 1].cluster; + + if (cluster_level == HB_BUFFER_CLUSTER_LEVEL_CHARACTERS || + (cluster != cluster_first && cluster != cluster_last)) + { + for (unsigned int i = start; i < end; i++) + if (cluster != infos[i].cluster) + { + scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS; + infos[i].mask |= mask; + } + return; + } + + /* Monotone clusters */ + + if (cluster == cluster_first) + { + for (unsigned int i = end; start < i && infos[i - 1].cluster != cluster_first; i--) { - scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_UNSAFE_TO_BREAK; - infos[i].mask |= HB_GLYPH_FLAG_UNSAFE_TO_BREAK; + scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS; + infos[i - 1].mask |= mask; } + } + else /* cluster == cluster_last */ + { + for (unsigned int i = start; i < end && infos[i].cluster != cluster_last; i++) + { + scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_GLYPH_FLAGS; + infos[i].mask |= mask; + } + } + } + unsigned + _infos_find_min_cluster (const hb_glyph_info_t *infos, + unsigned start, unsigned end, + unsigned cluster = UINT_MAX) + { + if (unlikely (start == end)) + return cluster; + + if (cluster_level == HB_BUFFER_CLUSTER_LEVEL_CHARACTERS) + { + for (unsigned int i = start; i < end; i++) + cluster = hb_min (cluster, infos[i].cluster); + return cluster; + } + + return hb_min (cluster, hb_min (infos[start].cluster, infos[end - 1].cluster)); } - void unsafe_to_break_all () { unsafe_to_break_impl (0, len); } - void safe_to_break_all () + void clear_glyph_flags (hb_mask_t mask = 0) { for (unsigned int i = 0; i < len; i++) - info[i].mask &= ~HB_GLYPH_FLAG_UNSAFE_TO_BREAK; + info[i].mask = (info[i].mask & ~HB_GLYPH_FLAG_DEFINED) | (mask & HB_GLYPH_FLAG_DEFINED); } }; DECLARE_NULL_INSTANCE (hb_buffer_t); -/* Loop over clusters. Duplicated in foreach_syllable(). */ -#define foreach_cluster(buffer, start, end) \ +#define foreach_group(buffer, start, end, group_func) \ for (unsigned int \ _count = buffer->len, \ - start = 0, end = _count ? _next_cluster (buffer, 0) : 0; \ + start = 0, end = _count ? buffer->group_end (0, group_func) : 0; \ start < _count; \ - start = end, end = _next_cluster (buffer, start)) + start = end, end = buffer->group_end (start, group_func)) -static inline unsigned int -_next_cluster (hb_buffer_t *buffer, unsigned int start) -{ - hb_glyph_info_t *info = buffer->info; - unsigned int count = buffer->len; - - unsigned int cluster = info[start].cluster; - while (++start < count && cluster == info[start].cluster) - ; - - return start; -} +#define foreach_cluster(buffer, start, end) \ + foreach_group (buffer, start, end, hb_buffer_t::_cluster_group_func) #define HB_BUFFER_XALLOCATE_VAR(b, func, var) \ b->func (offsetof (hb_glyph_info_t, var) - offsetof(hb_glyph_info_t, var1), \ sizeof (b->info[0].var)) -#define HB_BUFFER_ALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, allocate_var, var ()) -#define HB_BUFFER_DEALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, deallocate_var, var ()) -#define HB_BUFFER_ASSERT_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, assert_var, var ()) +#define HB_BUFFER_ALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, allocate_var, var ()) +#define HB_BUFFER_TRY_ALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, try_allocate_var, var ()) +#define HB_BUFFER_DEALLOCATE_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, deallocate_var, var ()) +#define HB_BUFFER_ASSERT_VAR(b, var) HB_BUFFER_XALLOCATE_VAR (b, assert_var, var ()) #endif /* HB_BUFFER_HH */ |