#include "hb.hh"
#include "hb-unicode.hh"
+#include "hb-set-digest.hh"
-#ifndef HB_BUFFER_MAX_LEN_FACTOR
-#define HB_BUFFER_MAX_LEN_FACTOR 32
-#endif
-#ifndef HB_BUFFER_MAX_LEN_MIN
-#define HB_BUFFER_MAX_LEN_MIN 8192
-#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 64
-#endif
-#ifndef HB_BUFFER_MAX_OPS_MIN
-#define HB_BUFFER_MAX_OPS_MIN 1024
-#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);
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);
{
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". */
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;
-
- /* 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;
+ unsigned message_depth; /* How deeply are we inside a message callback? */
+#else
+ static constexpr unsigned message_depth = 0u;
#endif
+
/* Methods */
- bool in_error () const { return !successful; }
+ HB_NODISCARD bool in_error () const { return !successful; }
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]; }
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]; }
- 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 ();
- HB_INTERNAL void guess_segment_properties ();
+ 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); }
- HB_INTERNAL void swap_buffers ();
- HB_INTERNAL void remove_output ();
- HB_INTERNAL void clear_output ();
- HB_INTERNAL void clear_positions ();
+ 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);
- HB_INTERNAL void replace_glyphs (unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data);
+ reverse ();
+ }
- void replace_glyph (hb_codepoint_t glyph_index)
+ template <typename FuncType>
+ unsigned group_end (unsigned start, const FuncType& group) const
{
- if (unlikely (out_info != info || out_len != idx)) {
- if (unlikely (!make_room_for (1, 1))) return;
- out_info[out_len] = info[idx];
- }
- out_info[out_len].codepoint = glyph_index;
+ while (++start < len && group (info[start - 1], info[start]))
+ ;
- idx++;
- out_len++;
+ return start;
}
- /* Makes a copy of the glyph at idx to output and replace glyph_index */
- hb_glyph_info_t & output_glyph (hb_codepoint_t glyph_index)
+
+ 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 bool sync ();
+ HB_INTERNAL int sync_so_far ();
+ HB_INTERNAL void clear_output ();
+ HB_INTERNAL void clear_positions ();
+
+ template <typename T>
+ HB_NODISCARD bool replace_glyphs (unsigned int num_in,
+ unsigned int num_out,
+ const T *glyph_data)
{
- if (unlikely (!make_room_for (0, 1))) return Crap(hb_glyph_info_t);
+ if (unlikely (!make_room_for (num_in, num_out))) return false;
- if (unlikely (idx == len && !out_len))
- return Crap(hb_glyph_info_t);
+ assert (idx + num_in <= len);
- out_info[out_len] = idx < len ? info[idx] : out_info[out_len - 1];
- out_info[out_len].codepoint = glyph_index;
+ merge_clusters (idx, idx + num_in);
- out_len++;
+ hb_glyph_info_t &orig_info = idx < len ? cur() : prev();
- return out_info[out_len - 1];
+ hb_glyph_info_t *pinfo = &out_info[out_len];
+ for (unsigned int i = 0; i < num_out; i++)
+ {
+ *pinfo = orig_info;
+ pinfo->codepoint = glyph_data[i];
+ pinfo++;
+ }
+
+ idx += num_in;
+ out_len += num_out;
+ return true;
}
- void output_info (const hb_glyph_info_t &glyph_info)
+
+ HB_NODISCARD bool replace_glyph (hb_codepoint_t glyph_index)
+ { return replace_glyphs (1, 1, &glyph_index); }
+
+ /* Makes a copy of the glyph at idx to output and replace glyph_index */
+ HB_NODISCARD bool output_glyph (hb_codepoint_t glyph_index)
+ { return replace_glyphs (0, 1, &glyph_index); }
+
+ HB_NODISCARD bool output_info (const hb_glyph_info_t &glyph_info)
{
- if (unlikely (!make_room_for (0, 1))) return;
+ if (unlikely (!make_room_for (0, 1))) return false;
out_info[out_len] = glyph_info;
out_len++;
+ return true;
}
/* Copies glyph at idx to output but doesn't advance idx */
- void copy_glyph ()
+ HB_NODISCARD bool copy_glyph ()
{
- if (unlikely (!make_room_for (0, 1))) return;
-
- out_info[out_len] = info[idx];
-
- out_len++;
+ /* Extra copy because cur()'s return can be freed within
+ * output_info() call if buffer reallocates. */
+ return output_info (hb_glyph_info_t (cur()));
}
+
/* Copies glyph at idx to output and advance idx.
* If there's no output, just advance idx. */
- void
- next_glyph ()
+ HB_NODISCARD bool next_glyph ()
{
if (have_output)
{
if (out_info != info || out_len != idx)
{
- if (unlikely (!make_room_for (1, 1))) return;
+ if (unlikely (!make_room_for (1, 1))) return false;
out_info[out_len] = info[idx];
}
out_len++;
}
idx++;
+ return true;
}
/* Copies n glyphs at idx to output and advance idx.
* If there's no output, just advance idx. */
- void
- next_glyphs (unsigned int n)
+ HB_NODISCARD bool next_glyphs (unsigned int n)
{
if (have_output)
{
if (out_info != info || out_len != idx)
{
- if (unlikely (!make_room_for (n, n))) return;
+ if (unlikely (!make_room_for (n, n))) return false;
memmove (out_info + out_len, info + idx, n * sizeof (out_info[0]));
}
out_len += n;
}
idx += n;
+ return true;
}
/* Advance idx without copying to output. */
void skip_glyph () { idx++; }
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;
- unsafe_to_break_impl (start, end);
+
+ 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;
+ _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 */
- HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
+ HB_NODISCARD HB_INTERNAL bool move_to (unsigned int i); /* i is output-buffer index. */
- HB_INTERNAL bool enlarge (unsigned int size);
+ HB_NODISCARD HB_INTERNAL bool enlarge (unsigned int size);
- bool ensure (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); }
- bool ensure_inplace (unsigned int size)
+ HB_NODISCARD bool ensure_inplace (unsigned int size)
{ return likely (!size || size < allocated); }
- HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
- HB_INTERNAL bool shift_forward (unsigned int count);
+ void assert_glyphs ()
+ {
+ assert ((content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS) ||
+ (!len && (content_type == HB_BUFFER_CONTENT_TYPE_INVALID)));
+ }
+ void assert_unicode ()
+ {
+ assert ((content_type == HB_BUFFER_CONTENT_TYPE_UNICODE) ||
+ (!len && (content_type == HB_BUFFER_CONTENT_TYPE_INVALID)));
+ }
+ HB_NODISCARD bool ensure_glyphs ()
+ {
+ if (unlikely (content_type != HB_BUFFER_CONTENT_TYPE_GLYPHS))
+ {
+ if (content_type != HB_BUFFER_CONTENT_TYPE_INVALID)
+ return false;
+ assert (len == 0);
+ content_type = HB_BUFFER_CONTENT_TYPE_GLYPHS;
+ }
+ return true;
+ }
+ HB_NODISCARD bool ensure_unicode ()
+ {
+ if (unlikely (content_type != HB_BUFFER_CONTENT_TYPE_UNICODE))
+ {
+ if (content_type != HB_BUFFER_CONTENT_TYPE_INVALID)
+ return false;
+ assert (len == 0);
+ content_type = HB_BUFFER_CONTENT_TYPE_UNICODE;
+ }
+ return true;
+ }
+
+ HB_NODISCARD HB_INTERNAL bool make_room_for (unsigned int num_in, unsigned int num_out);
+ HB_NODISCARD HB_INTERNAL bool shift_forward (unsigned int count);
typedef long scratch_buffer_t;
HB_INTERNAL scratch_buffer_t *get_scratch_buffer (unsigned int *size);
HB_INTERNAL void sort (unsigned int start, unsigned int end, int(*compar)(const hb_glyph_info_t *, const hb_glyph_info_t *));
- bool messaging () { return unlikely (message_func); }
+ bool messaging ()
+ {
+#ifdef HB_NO_BUFFER_MESSAGE
+ return false;
+#else
+ return unlikely (message_func);
+#endif
+ }
bool message (hb_font_t *font, const char *fmt, ...) HB_PRINTF_FUNC(3, 4)
{
- if (!messaging ())
+#ifdef HB_NO_BUFFER_MESSAGE
+ return true;
+#else
+ 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
}
HB_INTERNAL bool message_impl (hb_font_t *font, const char *fmt, va_list ap) HB_PRINTF_FUNC(3, 0);
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;
}
-
- 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 = MIN<unsigned int> (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))
-
-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;
+ start = end, end = buffer->group_end (start, group_func))
- 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 */
projects / platform / upstream / harfbuzz.git / blobdiff