#ifndef HB_OT_CMAP_TABLE_HH
#define HB_OT_CMAP_TABLE_HH
-#include "hb-open-type-private.hh"
-
-
-namespace OT {
-
+#include "hb-open-type.hh"
+#include "hb-set.hh"
/*
- * cmap -- Character To Glyph Index Mapping Table
+ * cmap -- Character to Glyph Index Mapping
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/cmap
*/
-
#define HB_OT_TAG_cmap HB_TAG('c','m','a','p')
+namespace OT {
+
struct CmapSubtableFormat0
{
- inline bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
+ bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
{
hb_codepoint_t gid = codepoint < 256 ? glyphIdArray[codepoint] : 0;
if (!gid)
*glyph = gid;
return true;
}
+ void collect_unicodes (hb_set_t *out) const
+ {
+ for (unsigned int i = 0; i < 256; i++)
+ if (glyphIdArray[i])
+ out->add (i);
+ }
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
protected:
- USHORT format; /* Format number is set to 0. */
- USHORT lengthZ; /* Byte length of this subtable. */
- USHORT languageZ; /* Ignore. */
- BYTE glyphIdArray[256];/* An array that maps character
+ HBUINT16 format; /* Format number is set to 0. */
+ HBUINT16 length; /* Byte length of this subtable. */
+ HBUINT16 language; /* Ignore. */
+ HBUINT8 glyphIdArray[256];/* An array that maps character
* code to glyph index values. */
public:
DEFINE_SIZE_STATIC (6 + 256);
struct CmapSubtableFormat4
{
+ struct segment_plan
+ {
+ HBUINT16 start_code;
+ HBUINT16 end_code;
+ bool use_delta;
+ };
+
+ bool serialize (hb_serialize_context_t *c,
+ const hb_subset_plan_t *plan,
+ const hb_vector_t<segment_plan> &segments)
+ {
+ TRACE_SERIALIZE (this);
+
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+
+ this->format.set (4);
+ this->length.set (get_sub_table_size (segments));
+
+ this->segCountX2.set (segments.length * 2);
+ this->entrySelector.set (MAX (1u, hb_bit_storage (segments.length)) - 1);
+ this->searchRange.set (2 * (1u << this->entrySelector));
+ this->rangeShift.set (segments.length * 2 > this->searchRange
+ ? 2 * segments.length - this->searchRange
+ : 0);
+
+ HBUINT16 *end_count = c->allocate_size<HBUINT16> (HBUINT16::static_size * segments.length);
+ c->allocate_size<HBUINT16> (HBUINT16::static_size); // 2 bytes of padding.
+ HBUINT16 *start_count = c->allocate_size<HBUINT16> (HBUINT16::static_size * segments.length);
+ HBINT16 *id_delta = c->allocate_size<HBINT16> (HBUINT16::static_size * segments.length);
+ HBUINT16 *id_range_offset = c->allocate_size<HBUINT16> (HBUINT16::static_size * segments.length);
+
+ if (id_range_offset == nullptr)
+ return_trace (false);
+
+ for (unsigned int i = 0; i < segments.length; i++)
+ {
+ end_count[i].set (segments[i].end_code);
+ start_count[i].set (segments[i].start_code);
+ if (segments[i].use_delta)
+ {
+ hb_codepoint_t cp = segments[i].start_code;
+ hb_codepoint_t start_gid = 0;
+ if (unlikely (!plan->new_gid_for_codepoint (cp, &start_gid) && cp != 0xFFFF))
+ return_trace (false);
+ id_delta[i].set (start_gid - segments[i].start_code);
+ } else {
+ id_delta[i].set (0);
+ unsigned int num_codepoints = segments[i].end_code - segments[i].start_code + 1;
+ HBUINT16 *glyph_id_array = c->allocate_size<HBUINT16> (HBUINT16::static_size * num_codepoints);
+ if (glyph_id_array == nullptr)
+ return_trace (false);
+ // From the cmap spec:
+ //
+ // id_range_offset[i]/2
+ // + (cp - segments[i].start_code)
+ // + (id_range_offset + i)
+ // =
+ // glyph_id_array + (cp - segments[i].start_code)
+ //
+ // So, solve for id_range_offset[i]:
+ //
+ // id_range_offset[i]
+ // =
+ // 2 * (glyph_id_array - id_range_offset - i)
+ id_range_offset[i].set (2 * (
+ glyph_id_array - id_range_offset - i));
+ for (unsigned int j = 0; j < num_codepoints; j++)
+ {
+ hb_codepoint_t cp = segments[i].start_code + j;
+ hb_codepoint_t new_gid;
+ if (unlikely (!plan->new_gid_for_codepoint (cp, &new_gid)))
+ return_trace (false);
+ glyph_id_array[j].set (new_gid);
+ }
+ }
+ }
+
+ return_trace (true);
+ }
+
+ static size_t get_sub_table_size (const hb_vector_t<segment_plan> &segments)
+ {
+ size_t segment_size = 0;
+ for (unsigned int i = 0; i < segments.length; i++)
+ {
+ // Parallel array entries
+ segment_size +=
+ 2 // end count
+ + 2 // start count
+ + 2 // delta
+ + 2; // range offset
+
+ if (!segments[i].use_delta)
+ // Add bytes for the glyph index array entries for this segment.
+ segment_size += (segments[i].end_code - segments[i].start_code + 1) * 2;
+ }
+
+ return min_size
+ + 2 // Padding
+ + segment_size;
+ }
+
+ static bool create_sub_table_plan (const hb_subset_plan_t *plan,
+ hb_vector_t<segment_plan> *segments)
+ {
+ segment_plan *segment = nullptr;
+ hb_codepoint_t last_gid = 0;
+
+ hb_codepoint_t cp = HB_SET_VALUE_INVALID;
+ while (plan->unicodes->next (&cp)) {
+ hb_codepoint_t new_gid;
+ if (unlikely (!plan->new_gid_for_codepoint (cp, &new_gid)))
+ {
+ DEBUG_MSG(SUBSET, nullptr, "Unable to find new gid for %04x", cp);
+ return false;
+ }
+
+ /* Stop adding to cmap if we are now outside of unicode BMP. */
+ if (cp > 0xFFFF) break;
+
+ if (!segment ||
+ cp != segment->end_code + 1u)
+ {
+ segment = segments->push ();
+ segment->start_code.set (cp);
+ segment->end_code.set (cp);
+ segment->use_delta = true;
+ } else {
+ segment->end_code.set (cp);
+ if (last_gid + 1u != new_gid)
+ // gid's are not consecutive in this segment so delta
+ // cannot be used.
+ segment->use_delta = false;
+ }
+
+ last_gid = new_gid;
+ }
+
+ // There must be a final entry with end_code == 0xFFFF. Check if we need to add one.
+ if (segment == nullptr || segment->end_code != 0xFFFF)
+ {
+ segment = segments->push ();
+ segment->start_code.set (0xFFFF);
+ segment->end_code.set (0xFFFF);
+ segment->use_delta = true;
+ }
+
+ return true;
+ }
+
struct accelerator_t
{
- inline void init (const CmapSubtableFormat4 *subtable)
+ accelerator_t () {}
+ accelerator_t (const CmapSubtableFormat4 *subtable) { init (subtable); }
+ ~accelerator_t () { fini (); }
+
+ void init (const CmapSubtableFormat4 *subtable)
{
segCount = subtable->segCountX2 / 2;
- endCount = subtable->values;
+ endCount = subtable->values.arrayZ;
startCount = endCount + segCount + 1;
idDelta = startCount + segCount;
idRangeOffset = idDelta + segCount;
glyphIdArray = idRangeOffset + segCount;
glyphIdArrayLength = (subtable->length - 16 - 8 * segCount) / 2;
}
+ void fini () {}
- static inline bool get_glyph_func (const void *obj, hb_codepoint_t codepoint, hb_codepoint_t *glyph)
+ bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
{
- const accelerator_t *thiz = (const accelerator_t *) obj;
-
/* Custom two-array bsearch. */
- int min = 0, max = (int) thiz->segCount - 1;
- const USHORT *startCount = thiz->startCount;
- const USHORT *endCount = thiz->endCount;
+ int min = 0, max = (int) this->segCount - 1;
+ const HBUINT16 *startCount = this->startCount;
+ const HBUINT16 *endCount = this->endCount;
unsigned int i;
while (min <= max)
{
- int mid = (min + max) / 2;
+ int mid = ((unsigned int) min + (unsigned int) max) / 2;
if (codepoint < startCount[mid])
max = mid - 1;
else if (codepoint > endCount[mid])
found:
hb_codepoint_t gid;
- unsigned int rangeOffset = thiz->idRangeOffset[i];
+ unsigned int rangeOffset = this->idRangeOffset[i];
if (rangeOffset == 0)
- gid = codepoint + thiz->idDelta[i];
+ gid = codepoint + this->idDelta[i];
else
{
/* Somebody has been smoking... */
- unsigned int index = rangeOffset / 2 + (codepoint - thiz->startCount[i]) + i - thiz->segCount;
- if (unlikely (index >= thiz->glyphIdArrayLength))
+ unsigned int index = rangeOffset / 2 + (codepoint - this->startCount[i]) + i - this->segCount;
+ if (unlikely (index >= this->glyphIdArrayLength))
return false;
- gid = thiz->glyphIdArray[index];
+ gid = this->glyphIdArray[index];
if (unlikely (!gid))
return false;
- gid += thiz->idDelta[i];
+ gid += this->idDelta[i];
}
-
- *glyph = gid & 0xFFFFu;
+ gid &= 0xFFFFu;
+ if (!gid)
+ return false;
+ *glyph = gid;
return true;
}
+ static bool get_glyph_func (const void *obj, hb_codepoint_t codepoint, hb_codepoint_t *glyph)
+ {
+ return ((const accelerator_t *) obj)->get_glyph (codepoint, glyph);
+ }
+ void collect_unicodes (hb_set_t *out) const
+ {
+ unsigned int count = this->segCount;
+ if (count && this->startCount[count - 1] == 0xFFFFu)
+ count--; /* Skip sentinel segment. */
+ for (unsigned int i = 0; i < count; i++)
+ {
+ unsigned int rangeOffset = this->idRangeOffset[i];
+ if (rangeOffset == 0)
+ out->add_range (this->startCount[i], this->endCount[i]);
+ else
+ {
+ for (hb_codepoint_t codepoint = this->startCount[i];
+ codepoint <= this->endCount[i];
+ codepoint++)
+ {
+ unsigned int index = rangeOffset / 2 + (codepoint - this->startCount[i]) + i - this->segCount;
+ if (unlikely (index >= this->glyphIdArrayLength))
+ break;
+ hb_codepoint_t gid = this->glyphIdArray[index];
+ if (unlikely (!gid))
+ continue;
+ out->add (codepoint);
+ }
+ }
+ }
+ }
- const USHORT *endCount;
- const USHORT *startCount;
- const USHORT *idDelta;
- const USHORT *idRangeOffset;
- const USHORT *glyphIdArray;
+ const HBUINT16 *endCount;
+ const HBUINT16 *startCount;
+ const HBUINT16 *idDelta;
+ const HBUINT16 *idRangeOffset;
+ const HBUINT16 *glyphIdArray;
unsigned int segCount;
unsigned int glyphIdArrayLength;
};
- inline bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
+ bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
{
- accelerator_t accel;
- accel.init (this);
+ accelerator_t accel (this);
return accel.get_glyph_func (&accel, codepoint, glyph);
}
+ void collect_unicodes (hb_set_t *out) const
+ {
+ accelerator_t accel (this);
+ accel.collect_unicodes (out);
+ }
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this)))
return_trace (16 + 4 * (unsigned int) segCountX2 <= length);
}
+
+
protected:
- USHORT format; /* Format number is set to 4. */
- USHORT length; /* This is the length in bytes of the
+ HBUINT16 format; /* Format number is set to 4. */
+ HBUINT16 length; /* This is the length in bytes of the
* subtable. */
- USHORT languageZ; /* Ignore. */
- USHORT segCountX2; /* 2 x segCount. */
- USHORT searchRangeZ; /* 2 * (2**floor(log2(segCount))) */
- USHORT entrySelectorZ; /* log2(searchRange/2) */
- USHORT rangeShiftZ; /* 2 x segCount - searchRange */
-
- USHORT values[VAR];
+ HBUINT16 language; /* Ignore. */
+ HBUINT16 segCountX2; /* 2 x segCount. */
+ HBUINT16 searchRange; /* 2 * (2**floor(log2(segCount))) */
+ HBUINT16 entrySelector; /* log2(searchRange/2) */
+ HBUINT16 rangeShift; /* 2 x segCount - searchRange */
+
+ UnsizedArrayOf<HBUINT16>
+ values;
#if 0
- USHORT endCount[segCount]; /* End characterCode for each segment,
+ HBUINT16 endCount[segCount]; /* End characterCode for each segment,
* last=0xFFFFu. */
- USHORT reservedPad; /* Set to 0. */
- USHORT startCount[segCount]; /* Start character code for each segment. */
- SHORT idDelta[segCount]; /* Delta for all character codes in segment. */
- USHORT idRangeOffset[segCount];/* Offsets into glyphIdArray or 0 */
- USHORT glyphIdArray[VAR]; /* Glyph index array (arbitrary length) */
+ HBUINT16 reservedPad; /* Set to 0. */
+ HBUINT16 startCount[segCount]; /* Start character code for each segment. */
+ HBINT16 idDelta[segCount]; /* Delta for all character codes in segment. */
+ HBUINT16 idRangeOffset[segCount];/* Offsets into glyphIdArray or 0 */
+ UnsizedArrayOf<HBUINT16>
+ glyphIdArray; /* Glyph index array (arbitrary length) */
#endif
public:
{
friend struct CmapSubtableFormat12;
friend struct CmapSubtableFormat13;
+ template<typename U>
+ friend struct CmapSubtableLongSegmented;
+ friend struct cmap;
int cmp (hb_codepoint_t codepoint) const
{
return 0;
}
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
private:
- ULONG startCharCode; /* First character code in this group. */
- ULONG endCharCode; /* Last character code in this group. */
- ULONG glyphID; /* Glyph index; interpretation depends on
- * subtable format. */
+ HBUINT32 startCharCode; /* First character code in this group. */
+ HBUINT32 endCharCode; /* Last character code in this group. */
+ HBUINT32 glyphID; /* Glyph index; interpretation depends on
+ * subtable format. */
public:
DEFINE_SIZE_STATIC (12);
};
+DECLARE_NULL_NAMESPACE_BYTES (OT, CmapSubtableLongGroup);
template <typename UINT>
struct CmapSubtableTrimmed
{
- inline bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
+ bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
{
/* Rely on our implicit array bound-checking. */
hb_codepoint_t gid = glyphIdArray[codepoint - startCharCode];
*glyph = gid;
return true;
}
+ void collect_unicodes (hb_set_t *out) const
+ {
+ hb_codepoint_t start = startCharCode;
+ unsigned int count = glyphIdArray.len;
+ for (unsigned int i = 0; i < count; i++)
+ if (glyphIdArray[i])
+ out->add (start + i);
+ }
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && glyphIdArray.sanitize (c));
protected:
UINT formatReserved; /* Subtable format and (maybe) padding. */
- UINT lengthZ; /* Byte length of this subtable. */
- UINT languageZ; /* Ignore. */
+ UINT length; /* Byte length of this subtable. */
+ UINT language; /* Ignore. */
UINT startCharCode; /* First character code covered. */
ArrayOf<GlyphID, UINT>
glyphIdArray; /* Array of glyph index values for character
DEFINE_SIZE_ARRAY (5 * sizeof (UINT), glyphIdArray);
};
-struct CmapSubtableFormat6 : CmapSubtableTrimmed<USHORT> {};
-struct CmapSubtableFormat10 : CmapSubtableTrimmed<ULONG > {};
+struct CmapSubtableFormat6 : CmapSubtableTrimmed<HBUINT16> {};
+struct CmapSubtableFormat10 : CmapSubtableTrimmed<HBUINT32 > {};
template <typename T>
struct CmapSubtableLongSegmented
{
- inline bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
+ friend struct cmap;
+
+ bool get_glyph (hb_codepoint_t codepoint, hb_codepoint_t *glyph) const
{
- int i = groups.bsearch (codepoint);
- if (i == -1)
+ hb_codepoint_t gid = T::group_get_glyph (groups.bsearch (codepoint), codepoint);
+ if (!gid)
return false;
- *glyph = T::group_get_glyph (groups[i], codepoint);
+ *glyph = gid;
return true;
}
- inline bool sanitize (hb_sanitize_context_t *c) const
+ void collect_unicodes (hb_set_t *out) const
+ {
+ for (unsigned int i = 0; i < this->groups.len; i++) {
+ out->add_range (this->groups[i].startCharCode,
+ MIN ((hb_codepoint_t) this->groups[i].endCharCode,
+ (hb_codepoint_t) HB_UNICODE_MAX));
+ }
+ }
+
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) && groups.sanitize (c));
}
+ bool serialize (hb_serialize_context_t *c,
+ const hb_vector_t<CmapSubtableLongGroup> &group_data)
+ {
+ TRACE_SERIALIZE (this);
+ if (unlikely (!c->extend_min (*this))) return_trace (false);
+ if (unlikely (!groups.serialize (c, group_data.as_array ()))) return_trace (false);
+ return true;
+ }
+
protected:
- USHORT format; /* Subtable format; set to 12. */
- USHORT reservedZ; /* Reserved; set to 0. */
- ULONG lengthZ; /* Byte length of this subtable. */
- ULONG languageZ; /* Ignore. */
- SortedArrayOf<CmapSubtableLongGroup, ULONG>
+ HBUINT16 format; /* Subtable format; set to 12. */
+ HBUINT16 reserved; /* Reserved; set to 0. */
+ HBUINT32 length; /* Byte length of this subtable. */
+ HBUINT32 language; /* Ignore. */
+ SortedArrayOf<CmapSubtableLongGroup, HBUINT32>
groups; /* Groupings. */
public:
DEFINE_SIZE_ARRAY (16, groups);
struct CmapSubtableFormat12 : CmapSubtableLongSegmented<CmapSubtableFormat12>
{
- static inline hb_codepoint_t group_get_glyph (const CmapSubtableLongGroup &group,
- hb_codepoint_t u)
- { return group.glyphID + (u - group.startCharCode); }
+ static hb_codepoint_t group_get_glyph (const CmapSubtableLongGroup &group,
+ hb_codepoint_t u)
+ { return likely (group.startCharCode <= group.endCharCode) ?
+ group.glyphID + (u - group.startCharCode) : 0; }
+
+
+ bool serialize (hb_serialize_context_t *c,
+ const hb_vector_t<CmapSubtableLongGroup> &groups)
+ {
+ if (unlikely (!c->extend_min (*this))) return false;
+
+ this->format.set (12);
+ this->reserved.set (0);
+ this->length.set (get_sub_table_size (groups));
+
+ return CmapSubtableLongSegmented<CmapSubtableFormat12>::serialize (c, groups);
+ }
+
+ static size_t get_sub_table_size (const hb_vector_t<CmapSubtableLongGroup> &groups)
+ {
+ return 16 + 12 * groups.length;
+ }
+
+ static bool create_sub_table_plan (const hb_subset_plan_t *plan,
+ hb_vector_t<CmapSubtableLongGroup> *groups)
+ {
+ CmapSubtableLongGroup *group = nullptr;
+
+ hb_codepoint_t cp = HB_SET_VALUE_INVALID;
+ while (plan->unicodes->next (&cp)) {
+ hb_codepoint_t new_gid;
+ if (unlikely (!plan->new_gid_for_codepoint (cp, &new_gid)))
+ {
+ DEBUG_MSG(SUBSET, nullptr, "Unable to find new gid for %04x", cp);
+ return false;
+ }
+
+ if (!group || !_is_gid_consecutive (group, cp, new_gid))
+ {
+ group = groups->push ();
+ group->startCharCode.set (cp);
+ group->endCharCode.set (cp);
+ group->glyphID.set (new_gid);
+ }
+ else group->endCharCode.set (cp);
+ }
+
+ DEBUG_MSG(SUBSET, nullptr, "cmap");
+ for (unsigned int i = 0; i < groups->length; i++) {
+ CmapSubtableLongGroup& group = (*groups)[i];
+ DEBUG_MSG(SUBSET, nullptr, " %d: U+%04X-U+%04X, gid %d-%d", i, (uint32_t) group.startCharCode, (uint32_t) group.endCharCode, (uint32_t) group.glyphID, (uint32_t) group.glyphID + ((uint32_t) group.endCharCode - (uint32_t) group.startCharCode));
+ }
+
+ return true;
+ }
+
+ private:
+ static bool _is_gid_consecutive (CmapSubtableLongGroup *group,
+ hb_codepoint_t cp,
+ hb_codepoint_t new_gid)
+ {
+ return (cp - 1 == group->endCharCode) &&
+ new_gid == group->glyphID + (cp - group->startCharCode);
+ }
+
};
struct CmapSubtableFormat13 : CmapSubtableLongSegmented<CmapSubtableFormat13>
{
- static inline hb_codepoint_t group_get_glyph (const CmapSubtableLongGroup &group,
- hb_codepoint_t u HB_UNUSED)
+ static hb_codepoint_t group_get_glyph (const CmapSubtableLongGroup &group,
+ hb_codepoint_t u HB_UNUSED)
{ return group.glyphID; }
};
struct UnicodeValueRange
{
- inline int cmp (const hb_codepoint_t &codepoint) const
+ int cmp (const hb_codepoint_t &codepoint) const
{
if (codepoint < startUnicodeValue) return -1;
if (codepoint > startUnicodeValue + additionalCount) return +1;
return 0;
}
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
- UINT24 startUnicodeValue; /* First value in this range. */
- BYTE additionalCount; /* Number of additional values in this
+ HBUINT24 startUnicodeValue; /* First value in this range. */
+ HBUINT8 additionalCount; /* Number of additional values in this
* range. */
public:
DEFINE_SIZE_STATIC (4);
};
-typedef SortedArrayOf<UnicodeValueRange, ULONG> DefaultUVS;
+struct DefaultUVS : SortedArrayOf<UnicodeValueRange, HBUINT32>
+{
+ void collect_unicodes (hb_set_t *out) const
+ {
+ unsigned int count = len;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ hb_codepoint_t first = arrayZ[i].startUnicodeValue;
+ hb_codepoint_t last = MIN ((hb_codepoint_t) (first + arrayZ[i].additionalCount),
+ (hb_codepoint_t) HB_UNICODE_MAX);
+ out->add_range (first, last);
+ }
+ }
+
+ public:
+ DEFINE_SIZE_ARRAY (4, *this);
+};
struct UVSMapping
{
- inline int cmp (const hb_codepoint_t &codepoint) const
+ int cmp (const hb_codepoint_t &codepoint) const
{
return unicodeValue.cmp (codepoint);
}
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this));
}
- UINT24 unicodeValue; /* Base Unicode value of the UVS */
+ HBUINT24 unicodeValue; /* Base Unicode value of the UVS */
GlyphID glyphID; /* Glyph ID of the UVS */
public:
DEFINE_SIZE_STATIC (5);
};
-typedef SortedArrayOf<UVSMapping, ULONG> NonDefaultUVS;
+struct NonDefaultUVS : SortedArrayOf<UVSMapping, HBUINT32>
+{
+ void collect_unicodes (hb_set_t *out) const
+ {
+ unsigned int count = len;
+ for (unsigned int i = 0; i < count; i++)
+ out->add (arrayZ[i].glyphID);
+ }
+
+ public:
+ DEFINE_SIZE_ARRAY (4, *this);
+};
struct VariationSelectorRecord
{
- inline glyph_variant_t get_glyph (hb_codepoint_t codepoint,
- hb_codepoint_t *glyph,
- const void *base) const
- {
- int i;
- const DefaultUVS &defaults = base+defaultUVS;
- i = defaults.bsearch (codepoint);
- if (i != -1)
+ glyph_variant_t get_glyph (hb_codepoint_t codepoint,
+ hb_codepoint_t *glyph,
+ const void *base) const
+ {
+ if ((base+defaultUVS).bfind (codepoint))
return GLYPH_VARIANT_USE_DEFAULT;
- const NonDefaultUVS &nonDefaults = base+nonDefaultUVS;
- i = nonDefaults.bsearch (codepoint);
- if (i != -1)
+ const UVSMapping &nonDefault = (base+nonDefaultUVS).bsearch (codepoint);
+ if (nonDefault.glyphID)
{
- *glyph = nonDefaults[i].glyphID;
+ *glyph = nonDefault.glyphID;
return GLYPH_VARIANT_FOUND;
}
return GLYPH_VARIANT_NOT_FOUND;
}
- inline int cmp (const hb_codepoint_t &variation_selector) const
+ void collect_unicodes (hb_set_t *out, const void *base) const
+ {
+ (base+defaultUVS).collect_unicodes (out);
+ (base+nonDefaultUVS).collect_unicodes (out);
+ }
+
+ int cmp (const hb_codepoint_t &variation_selector) const
{
return varSelector.cmp (variation_selector);
}
- inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
+ bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
nonDefaultUVS.sanitize (c, base));
}
- UINT24 varSelector; /* Variation selector. */
- OffsetTo<DefaultUVS, ULONG>
- defaultUVS; /* Offset to Default UVS Table. May be 0. */
- OffsetTo<NonDefaultUVS, ULONG>
- nonDefaultUVS; /* Offset to Non-Default UVS Table. May be 0. */
+ HBUINT24 varSelector; /* Variation selector. */
+ LOffsetTo<DefaultUVS>
+ defaultUVS; /* Offset to Default UVS Table. May be 0. */
+ LOffsetTo<NonDefaultUVS>
+ nonDefaultUVS; /* Offset to Non-Default UVS Table. May be 0. */
public:
DEFINE_SIZE_STATIC (11);
};
struct CmapSubtableFormat14
{
- inline glyph_variant_t get_glyph_variant (hb_codepoint_t codepoint,
- hb_codepoint_t variation_selector,
- hb_codepoint_t *glyph) const
+ glyph_variant_t get_glyph_variant (hb_codepoint_t codepoint,
+ hb_codepoint_t variation_selector,
+ hb_codepoint_t *glyph) const
{
- return record[record.bsearch(variation_selector)].get_glyph (codepoint, glyph, this);
+ return record.bsearch (variation_selector).get_glyph (codepoint, glyph, this);
}
- inline bool sanitize (hb_sanitize_context_t *c) const
+ void collect_variation_selectors (hb_set_t *out) const
+ {
+ unsigned int count = record.len;
+ for (unsigned int i = 0; i < count; i++)
+ out->add (record.arrayZ[i].varSelector);
+ }
+ void collect_variation_unicodes (hb_codepoint_t variation_selector,
+ hb_set_t *out) const
+ {
+ record.bsearch (variation_selector).collect_unicodes (out, this);
+ }
+
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
}
protected:
- USHORT format; /* Format number is set to 14. */
- ULONG lengthZ; /* Byte length of this subtable. */
- SortedArrayOf<VariationSelectorRecord, ULONG>
+ HBUINT16 format; /* Format number is set to 14. */
+ HBUINT32 length; /* Byte length of this subtable. */
+ SortedArrayOf<VariationSelectorRecord, HBUINT32>
record; /* Variation selector records; sorted
* in increasing order of `varSelector'. */
public:
{
/* Note: We intentionally do NOT implement subtable formats 2 and 8. */
- inline bool get_glyph (hb_codepoint_t codepoint,
- hb_codepoint_t *glyph) const
+ bool get_glyph (hb_codepoint_t codepoint,
+ hb_codepoint_t *glyph) const
{
switch (u.format) {
- case 0: return u.format0 .get_glyph(codepoint, glyph);
- case 4: return u.format4 .get_glyph(codepoint, glyph);
- case 6: return u.format6 .get_glyph(codepoint, glyph);
- case 10: return u.format10.get_glyph(codepoint, glyph);
- case 12: return u.format12.get_glyph(codepoint, glyph);
- case 13: return u.format13.get_glyph(codepoint, glyph);
+ case 0: return u.format0 .get_glyph (codepoint, glyph);
+ case 4: return u.format4 .get_glyph (codepoint, glyph);
+ case 6: return u.format6 .get_glyph (codepoint, glyph);
+ case 10: return u.format10.get_glyph (codepoint, glyph);
+ case 12: return u.format12.get_glyph (codepoint, glyph);
+ case 13: return u.format13.get_glyph (codepoint, glyph);
case 14:
default: return false;
}
}
+ void collect_unicodes (hb_set_t *out) const
+ {
+ switch (u.format) {
+ case 0: u.format0 .collect_unicodes (out); return;
+ case 4: u.format4 .collect_unicodes (out); return;
+ case 6: u.format6 .collect_unicodes (out); return;
+ case 10: u.format10.collect_unicodes (out); return;
+ case 12: u.format12.collect_unicodes (out); return;
+ case 13: u.format13.collect_unicodes (out); return;
+ case 14:
+ default: return;
+ }
+ }
- inline bool sanitize (hb_sanitize_context_t *c) const
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (!u.format.sanitize (c)) return_trace (false);
public:
union {
- USHORT format; /* Format identifier */
+ HBUINT16 format; /* Format identifier */
CmapSubtableFormat0 format0;
CmapSubtableFormat4 format4;
CmapSubtableFormat6 format6;
struct EncodingRecord
{
- inline int cmp (const EncodingRecord &other) const
+ int cmp (const EncodingRecord &other) const
{
int ret;
ret = platformID.cmp (other.platformID);
return 0;
}
- inline bool sanitize (hb_sanitize_context_t *c, const void *base) const
+ bool sanitize (hb_sanitize_context_t *c, const void *base) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
subtable.sanitize (c, base));
}
- USHORT platformID; /* Platform ID. */
- USHORT encodingID; /* Platform-specific encoding ID. */
- OffsetTo<CmapSubtable, ULONG>
+ HBUINT16 platformID; /* Platform ID. */
+ HBUINT16 encodingID; /* Platform-specific encoding ID. */
+ LOffsetTo<CmapSubtable>
subtable; /* Byte offset from beginning of table to the subtable for this encoding. */
public:
DEFINE_SIZE_STATIC (8);
struct cmap
{
- static const hb_tag_t tableTag = HB_OT_TAG_cmap;
+ static constexpr hb_tag_t tableTag = HB_OT_TAG_cmap;
+
+ struct subset_plan
+ {
+ size_t final_size () const
+ {
+ return 4 // header
+ + 8 * 3 // 3 EncodingRecord
+ + CmapSubtableFormat4::get_sub_table_size (this->format4_segments)
+ + CmapSubtableFormat12::get_sub_table_size (this->format12_groups);
+ }
+
+ hb_vector_t<CmapSubtableFormat4::segment_plan> format4_segments;
+ hb_vector_t<CmapSubtableLongGroup> format12_groups;
+ };
+
+ bool _create_plan (const hb_subset_plan_t *plan,
+ subset_plan *cmap_plan) const
+ {
+ if (unlikely (!CmapSubtableFormat4::create_sub_table_plan (plan, &cmap_plan->format4_segments)))
+ return false;
+
+ return CmapSubtableFormat12::create_sub_table_plan (plan, &cmap_plan->format12_groups);
+ }
+
+ bool _subset (const hb_subset_plan_t *plan,
+ const subset_plan &cmap_subset_plan,
+ size_t dest_sz,
+ void *dest) const
+ {
+ hb_serialize_context_t c (dest, dest_sz);
+
+ cmap *table = c.start_serialize<cmap> ();
+ if (unlikely (!c.extend_min (*table)))
+ {
+ return false;
+ }
+
+ table->version.set (0);
+
+ if (unlikely (!table->encodingRecord.serialize (&c, /* numTables */ 3)))
+ return false;
+
+ // TODO(grieger): Convert the below to a for loop
+
+ // Format 4, Plat 0 Encoding Record
+ EncodingRecord &format4_plat0_rec = table->encodingRecord[0];
+ format4_plat0_rec.platformID.set (0); // Unicode
+ format4_plat0_rec.encodingID.set (3);
- inline const CmapSubtable *find_subtable (unsigned int platform_id,
- unsigned int encoding_id) const
+ // Format 4, Plat 3 Encoding Record
+ EncodingRecord &format4_plat3_rec = table->encodingRecord[1];
+ format4_plat3_rec.platformID.set (3); // Windows
+ format4_plat3_rec.encodingID.set (1); // Unicode BMP
+
+ // Format 12 Encoding Record
+ EncodingRecord &format12_rec = table->encodingRecord[2];
+ format12_rec.platformID.set (3); // Windows
+ format12_rec.encodingID.set (10); // Unicode UCS-4
+
+ // Write out format 4 sub table
+ {
+ CmapSubtable &subtable = format4_plat0_rec.subtable.serialize (&c, table);
+ format4_plat3_rec.subtable.set (format4_plat0_rec.subtable);
+ subtable.u.format.set (4);
+
+ CmapSubtableFormat4 &format4 = subtable.u.format4;
+ if (unlikely (!format4.serialize (&c, plan, cmap_subset_plan.format4_segments)))
+ return false;
+ }
+
+ // Write out format 12 sub table.
+ {
+ CmapSubtable &subtable = format12_rec.subtable.serialize (&c, table);
+ subtable.u.format.set (12);
+
+ CmapSubtableFormat12 &format12 = subtable.u.format12;
+ if (unlikely (!format12.serialize (&c, cmap_subset_plan.format12_groups)))
+ return false;
+ }
+
+ c.end_serialize ();
+
+ return true;
+ }
+
+ bool subset (hb_subset_plan_t *plan) const
+ {
+ subset_plan cmap_subset_plan;
+
+ if (unlikely (!_create_plan (plan, &cmap_subset_plan)))
+ {
+ DEBUG_MSG(SUBSET, nullptr, "Failed to generate a cmap subsetting plan.");
+ return false;
+ }
+
+ // We now know how big our blob needs to be
+ size_t dest_sz = cmap_subset_plan.final_size ();
+ void *dest = malloc (dest_sz);
+ if (unlikely (!dest)) {
+ DEBUG_MSG(SUBSET, nullptr, "Unable to alloc %lu for cmap subset output", (unsigned long) dest_sz);
+ return false;
+ }
+
+ if (unlikely (!_subset (plan, cmap_subset_plan, dest_sz, dest)))
+ {
+ DEBUG_MSG(SUBSET, nullptr, "Failed to perform subsetting of cmap.");
+ free (dest);
+ return false;
+ }
+
+ // all done, write the blob into dest
+ hb_blob_t *cmap_prime = hb_blob_create ((const char *) dest,
+ dest_sz,
+ HB_MEMORY_MODE_READONLY,
+ dest,
+ free);
+ bool result = plan->add_table (HB_OT_TAG_cmap, cmap_prime);
+ hb_blob_destroy (cmap_prime);
+ return result;
+ }
+
+ const CmapSubtable *find_best_subtable (bool *symbol = nullptr) const
+ {
+ if (symbol) *symbol = false;
+
+ const CmapSubtable *subtable;
+
+ /* 32-bit subtables. */
+ if ((subtable = this->find_subtable (3, 10))) return subtable;
+ if ((subtable = this->find_subtable (0, 6))) return subtable;
+ if ((subtable = this->find_subtable (0, 4))) return subtable;
+
+ /* 16-bit subtables. */
+ if ((subtable = this->find_subtable (3, 1))) return subtable;
+ if ((subtable = this->find_subtable (0, 3))) return subtable;
+ if ((subtable = this->find_subtable (0, 2))) return subtable;
+ if ((subtable = this->find_subtable (0, 1))) return subtable;
+ if ((subtable = this->find_subtable (0, 0))) return subtable;
+
+ /* Symbol subtable. */
+ if ((subtable = this->find_subtable (3, 0)))
+ {
+ if (symbol) *symbol = true;
+ return subtable;
+ }
+
+ /* Meh. */
+ return &Null (CmapSubtable);
+ }
+
+ struct accelerator_t
+ {
+ void init (hb_face_t *face)
+ {
+ this->table = hb_sanitize_context_t ().reference_table<cmap> (face);
+ bool symbol;
+ this->subtable = table->find_best_subtable (&symbol);
+ this->subtable_uvs = &Null (CmapSubtableFormat14);
+ {
+ const CmapSubtable *st = table->find_subtable (0, 5);
+ if (st && st->u.format == 14)
+ subtable_uvs = &st->u.format14;
+ }
+
+ this->get_glyph_data = subtable;
+ if (unlikely (symbol))
+ {
+ this->get_glyph_funcZ = get_glyph_from_symbol<CmapSubtable>;
+ } else {
+ switch (subtable->u.format) {
+ /* Accelerate format 4 and format 12. */
+ default:
+ this->get_glyph_funcZ = get_glyph_from<CmapSubtable>;
+ break;
+ case 12:
+ this->get_glyph_funcZ = get_glyph_from<CmapSubtableFormat12>;
+ break;
+ case 4:
+ {
+ this->format4_accel.init (&subtable->u.format4);
+ this->get_glyph_data = &this->format4_accel;
+ this->get_glyph_funcZ = this->format4_accel.get_glyph_func;
+ }
+ break;
+ }
+ }
+ }
+
+ void fini () { this->table.destroy (); }
+
+ bool get_nominal_glyph (hb_codepoint_t unicode,
+ hb_codepoint_t *glyph) const
+ {
+ if (unlikely (!this->get_glyph_funcZ)) return false;
+ return this->get_glyph_funcZ (this->get_glyph_data, unicode, glyph);
+ }
+ unsigned int get_nominal_glyphs (unsigned int count,
+ const hb_codepoint_t *first_unicode,
+ unsigned int unicode_stride,
+ hb_codepoint_t *first_glyph,
+ unsigned int glyph_stride) const
+ {
+ if (unlikely (!this->get_glyph_funcZ)) return 0;
+
+ hb_cmap_get_glyph_func_t get_glyph_funcZ = this->get_glyph_funcZ;
+ const void *get_glyph_data = this->get_glyph_data;
+
+ unsigned int done;
+ for (done = 0;
+ done < count && get_glyph_funcZ (get_glyph_data, *first_unicode, first_glyph);
+ done++)
+ {
+ first_unicode = &StructAtOffsetUnaligned<hb_codepoint_t> (first_unicode, unicode_stride);
+ first_glyph = &StructAtOffsetUnaligned<hb_codepoint_t> (first_glyph, glyph_stride);
+ }
+ return done;
+ }
+
+ bool get_variation_glyph (hb_codepoint_t unicode,
+ hb_codepoint_t variation_selector,
+ hb_codepoint_t *glyph) const
+ {
+ switch (this->subtable_uvs->get_glyph_variant (unicode,
+ variation_selector,
+ glyph))
+ {
+ case GLYPH_VARIANT_NOT_FOUND: return false;
+ case GLYPH_VARIANT_FOUND: return true;
+ case GLYPH_VARIANT_USE_DEFAULT: break;
+ }
+
+ return get_nominal_glyph (unicode, glyph);
+ }
+
+ void collect_unicodes (hb_set_t *out) const
+ {
+ subtable->collect_unicodes (out);
+ }
+ void collect_variation_selectors (hb_set_t *out) const
+ {
+ subtable_uvs->collect_variation_selectors (out);
+ }
+ void collect_variation_unicodes (hb_codepoint_t variation_selector,
+ hb_set_t *out) const
+ {
+ subtable_uvs->collect_variation_unicodes (variation_selector, out);
+ }
+
+ protected:
+ typedef bool (*hb_cmap_get_glyph_func_t) (const void *obj,
+ hb_codepoint_t codepoint,
+ hb_codepoint_t *glyph);
+
+ template <typename Type>
+ static bool get_glyph_from (const void *obj,
+ hb_codepoint_t codepoint,
+ hb_codepoint_t *glyph)
+ {
+ const Type *typed_obj = (const Type *) obj;
+ return typed_obj->get_glyph (codepoint, glyph);
+ }
+
+ template <typename Type>
+ static bool get_glyph_from_symbol (const void *obj,
+ hb_codepoint_t codepoint,
+ hb_codepoint_t *glyph)
+ {
+ const Type *typed_obj = (const Type *) obj;
+ if (likely (typed_obj->get_glyph (codepoint, glyph)))
+ return true;
+
+ if (codepoint <= 0x00FFu)
+ {
+ /* For symbol-encoded OpenType fonts, we duplicate the
+ * U+F000..F0FF range at U+0000..U+00FF. That's what
+ * Windows seems to do, and that's hinted about at:
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/recom
+ * under "Non-Standard (Symbol) Fonts". */
+ return typed_obj->get_glyph (0xF000u + codepoint, glyph);
+ }
+
+ return false;
+ }
+
+ private:
+ hb_nonnull_ptr_t<const CmapSubtable> subtable;
+ hb_nonnull_ptr_t<const CmapSubtableFormat14> subtable_uvs;
+
+ hb_cmap_get_glyph_func_t get_glyph_funcZ;
+ const void *get_glyph_data;
+
+ CmapSubtableFormat4::accelerator_t format4_accel;
+
+ hb_blob_ptr_t<cmap> table;
+ };
+
+ protected:
+
+ const CmapSubtable *find_subtable (unsigned int platform_id,
+ unsigned int encoding_id) const
{
EncodingRecord key;
key.platformID.set (platform_id);
key.encodingID.set (encoding_id);
- /* Note: We can use bsearch, but since it has no performance
- * implications, we use lsearch and as such accept fonts with
- * unsorted subtable list. */
- int result = encodingRecord./*bsearch*/lsearch (key);
- if (result == -1 || !encodingRecord[result].subtable)
- return NULL;
+ const EncodingRecord &result = encodingRecord.bsearch (key);
+ if (!result.subtable)
+ return nullptr;
- return &(this+encodingRecord[result].subtable);
+ return &(this+result.subtable);
}
- inline bool sanitize (hb_sanitize_context_t *c) const
+ public:
+
+ bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
return_trace (c->check_struct (this) &&
encodingRecord.sanitize (c, this));
}
- USHORT version; /* Table version number (0). */
+ protected:
+ HBUINT16 version; /* Table version number (0). */
SortedArrayOf<EncodingRecord>
encodingRecord; /* Encoding tables. */
public:
DEFINE_SIZE_ARRAY (4, encodingRecord);
};
+struct cmap_accelerator_t : cmap::accelerator_t {};
} /* namespace OT */
projects / platform / upstream / harfbuzz.git / blobdiff