* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
- * Google Author(s): Seigo Nonaka
+ * Google Author(s): Seigo Nonaka, Calder Kitagawa
*/
#ifndef HB_OT_COLOR_CBDT_TABLE_HH
namespace OT {
+struct cblc_bitmap_size_subset_context_t
+{
+ const char *cbdt;
+ unsigned int cbdt_length;
+ hb_vector_t<char> *cbdt_prime;
+ unsigned int size; /* INOUT
+ * Input: old size of IndexSubtable
+ * Output: new size of IndexSubtable
+ */
+ unsigned int num_tables; /* INOUT
+ * Input: old number of subtables.
+ * Output: new number of subtables.
+ */
+ hb_codepoint_t start_glyph; /* OUT */
+ hb_codepoint_t end_glyph; /* OUT */
+};
+
+static inline bool
+_copy_data_to_cbdt (hb_vector_t<char> *cbdt_prime,
+ const void *data,
+ unsigned length)
+{
+ unsigned int new_len = cbdt_prime->length + length;
+ if (unlikely (!cbdt_prime->alloc (new_len))) return false;
+ memcpy (cbdt_prime->arrayZ + cbdt_prime->length, data, length);
+ cbdt_prime->length = new_len;
+ return true;
+}
+
struct SmallGlyphMetrics
{
bool sanitize (hb_sanitize_context_t *c) const
extents->x_bearing = font->em_scale_x (bearingX);
extents->y_bearing = font->em_scale_y (bearingY);
extents->width = font->em_scale_x (width);
- extents->height = font->em_scale_y (-height);
+ extents->height = font->em_scale_y (-static_cast<int>(height));
}
HBUINT8 height;
HBINT8 bearingY;
HBUINT8 advance;
public:
- DEFINE_SIZE_STATIC(5);
+ DEFINE_SIZE_STATIC (5);
};
struct BigGlyphMetrics : SmallGlyphMetrics
HBINT8 vertBearingY;
HBUINT8 vertAdvance;
public:
- DEFINE_SIZE_STATIC(8);
+ DEFINE_SIZE_STATIC (8);
};
struct SBitLineMetrics
HBINT8 padding1;
HBINT8 padding2;
public:
- DEFINE_SIZE_STATIC(12);
+ DEFINE_SIZE_STATIC (12);
};
HBUINT16 imageFormat;
HBUINT32 imageDataOffset;
public:
- DEFINE_SIZE_STATIC(8);
+ DEFINE_SIZE_STATIC (8);
};
template <typename OffsetType>
return true;
}
+ bool add_offset (hb_serialize_context_t *c,
+ unsigned int offset,
+ unsigned int *size /* OUT (accumulated) */)
+ {
+ TRACE_SERIALIZE (this);
+ Offset<OffsetType> embedded_offset;
+ embedded_offset = offset;
+ *size += sizeof (OffsetType);
+ auto *o = c->embed (embedded_offset);
+ return_trace ((bool) o);
+ }
+
IndexSubtableHeader header;
UnsizedArrayOf<Offset<OffsetType>>
- offsetArrayZ;
+ offsetArrayZ;
public:
- DEFINE_SIZE_ARRAY(8, offsetArrayZ);
+ DEFINE_SIZE_ARRAY (8, offsetArrayZ);
};
struct IndexSubtableFormat1 : IndexSubtableFormat1Or3<HBUINT32> {};
{
TRACE_SANITIZE (this);
if (!u.header.sanitize (c)) return_trace (false);
- switch (u.header.indexFormat) {
+ switch (u.header.indexFormat)
+ {
case 1: return_trace (u.format1.sanitize (c, glyph_count));
case 3: return_trace (u.format3.sanitize (c, glyph_count));
default:return_trace (true);
}
}
+ bool
+ finish_subtable (hb_serialize_context_t *c,
+ unsigned int cbdt_prime_len,
+ unsigned int num_glyphs,
+ unsigned int *size /* OUT (accumulated) */)
+ {
+ TRACE_SERIALIZE (this);
+
+ unsigned int local_offset = cbdt_prime_len - u.header.imageDataOffset;
+ switch (u.header.indexFormat)
+ {
+ case 1: return_trace (u.format1.add_offset (c, local_offset, size));
+ case 3: {
+ if (!u.format3.add_offset (c, local_offset, size))
+ return_trace (false);
+ if (!(num_glyphs & 0x01)) // Pad to 32-bit alignment if needed.
+ return_trace (u.format3.add_offset (c, 0, size));
+ return_trace (true);
+ }
+ // TODO: implement 2, 4, 5.
+ case 2: case 4: // No-op.
+ case 5: // Pad to 32-bit aligned.
+ default: return_trace (false);
+ }
+ }
+
+ bool
+ fill_missing_glyphs (hb_serialize_context_t *c,
+ unsigned int cbdt_prime_len,
+ unsigned int num_missing,
+ unsigned int *size /* OUT (accumulated) */,
+ unsigned int *num_glyphs /* OUT (accumulated) */)
+ {
+ TRACE_SERIALIZE (this);
+
+ unsigned int local_offset = cbdt_prime_len - u.header.imageDataOffset;
+ switch (u.header.indexFormat)
+ {
+ case 1: {
+ for (unsigned int i = 0; i < num_missing; i++)
+ {
+ if (unlikely (!u.format1.add_offset (c, local_offset, size)))
+ return_trace (false);
+ *num_glyphs += 1;
+ }
+ return_trace (true);
+ }
+ case 3: {
+ for (unsigned int i = 0; i < num_missing; i++)
+ {
+ if (unlikely (!u.format3.add_offset (c, local_offset, size)))
+ return_trace (false);
+ *num_glyphs += 1;
+ }
+ return_trace (true);
+ }
+ // TODO: implement 2, 4, 5.
+ case 2: // Add empty space in cbdt_prime?.
+ case 4: case 5: // No-op as sparse is supported.
+ default: return_trace (false);
+ }
+ }
+
+ bool
+ copy_glyph_at_idx (hb_serialize_context_t *c, unsigned int idx,
+ const char *cbdt, unsigned int cbdt_length,
+ hb_vector_t<char> *cbdt_prime /* INOUT */,
+ IndexSubtable *subtable_prime /* INOUT */,
+ unsigned int *size /* OUT (accumulated) */) const
+ {
+ TRACE_SERIALIZE (this);
+
+ unsigned int offset, length, format;
+ if (unlikely (!get_image_data (idx, &offset, &length, &format))) return_trace (false);
+ if (unlikely (offset > cbdt_length || cbdt_length - offset < length)) return_trace (false);
+
+ auto *header_prime = subtable_prime->get_header ();
+ unsigned int new_local_offset = cbdt_prime->length - (unsigned int) header_prime->imageDataOffset;
+ if (unlikely (!_copy_data_to_cbdt (cbdt_prime, cbdt + offset, length))) return_trace (false);
+
+ return_trace (subtable_prime->add_offset (c, new_local_offset, size));
+ }
+
+ bool
+ add_offset (hb_serialize_context_t *c, unsigned int local_offset,
+ unsigned int *size /* OUT (accumulated) */)
+ {
+ TRACE_SERIALIZE (this);
+ switch (u.header.indexFormat)
+ {
+ case 1: return_trace (u.format1.add_offset (c, local_offset, size));
+ case 3: return_trace (u.format3.add_offset (c, local_offset, size));
+ // TODO: Implement tables 2, 4, 5
+ case 2: // Should be a no-op.
+ case 4: case 5: // Handle sparse cases.
+ default: return_trace (false);
+ }
+ }
+
bool get_extents (hb_glyph_extents_t *extents HB_UNUSED) const
{
- switch (u.header.indexFormat) {
+ switch (u.header.indexFormat)
+ {
case 2: case 5: /* TODO */
case 1: case 3: case 4: /* Variable-metrics formats do not have metrics here. */
default:return (false);
}
}
- bool get_image_data (unsigned int idx,
- unsigned int *offset,
- unsigned int *length,
- unsigned int *format) const
+ bool
+ get_image_data (unsigned int idx, unsigned int *offset,
+ unsigned int *length, unsigned int *format) const
{
*format = u.header.imageFormat;
- switch (u.header.indexFormat) {
+ switch (u.header.indexFormat)
+ {
case 1: return u.format1.get_image_data (idx, offset, length);
case 3: return u.format3.get_image_data (idx, offset, length);
default: return false;
}
}
+ const IndexSubtableHeader* get_header () const { return &u.header; }
+
+ void populate_header (unsigned index_format,
+ unsigned image_format,
+ unsigned int image_data_offset,
+ unsigned int *size)
+ {
+ u.header.indexFormat = index_format;
+ u.header.imageFormat = image_format;
+ u.header.imageDataOffset = image_data_offset;
+ switch (u.header.indexFormat)
+ {
+ case 1: *size += IndexSubtableFormat1::min_size; break;
+ case 3: *size += IndexSubtableFormat3::min_size; break;
+ }
+ }
+
protected:
union {
IndexSubtableHeader header;
offsetToSubtable.sanitize (c, base, lastGlyphIndex - firstGlyphIndex + 1));
}
- bool get_extents (hb_glyph_extents_t *extents,
- const void *base) const
+ const IndexSubtable* get_subtable (const void *base) const
+ {
+ return &(base+offsetToSubtable);
+ }
+
+ bool add_new_subtable (hb_subset_context_t* c,
+ cblc_bitmap_size_subset_context_t *bitmap_size_context,
+ IndexSubtableRecord *record,
+ const hb_vector_t<hb_pair_t<hb_codepoint_t, const IndexSubtableRecord*>> *lookup, /* IN */
+ const void *base,
+ unsigned int *start /* INOUT */) const
+ {
+ TRACE_SERIALIZE (this);
+
+ auto *subtable = c->serializer->start_embed<IndexSubtable> ();
+ if (unlikely (!subtable)) return_trace (false);
+ if (unlikely (!c->serializer->extend_min (subtable))) return_trace (false);
+
+ auto *old_subtable = get_subtable (base);
+ auto *old_header = old_subtable->get_header ();
+
+ subtable->populate_header (old_header->indexFormat,
+ old_header->imageFormat,
+ bitmap_size_context->cbdt_prime->length,
+ &bitmap_size_context->size);
+
+ unsigned int num_glyphs = 0;
+ bool early_exit = false;
+ for (unsigned int i = *start; i < lookup->length; i++)
+ {
+ hb_codepoint_t new_gid = (*lookup)[i].first;
+ const IndexSubtableRecord *next_record = (*lookup)[i].second;
+ const IndexSubtable *next_subtable = next_record->get_subtable (base);
+ auto *next_header = next_subtable->get_header ();
+ if (next_header != old_header)
+ {
+ *start = i;
+ early_exit = true;
+ break;
+ }
+ unsigned int num_missing = record->add_glyph_for_subset (new_gid);
+ if (unlikely (!subtable->fill_missing_glyphs (c->serializer,
+ bitmap_size_context->cbdt_prime->length,
+ num_missing,
+ &bitmap_size_context->size,
+ &num_glyphs)))
+ return_trace (false);
+
+ hb_codepoint_t old_gid = 0;
+ c->plan->old_gid_for_new_gid (new_gid, &old_gid);
+ if (old_gid < next_record->firstGlyphIndex)
+ return_trace (false);
+
+ unsigned int old_idx = (unsigned int) old_gid - next_record->firstGlyphIndex;
+ if (unlikely (!next_subtable->copy_glyph_at_idx (c->serializer,
+ old_idx,
+ bitmap_size_context->cbdt,
+ bitmap_size_context->cbdt_length,
+ bitmap_size_context->cbdt_prime,
+ subtable,
+ &bitmap_size_context->size)))
+ return_trace (false);
+ num_glyphs += 1;
+ }
+ if (!early_exit)
+ *start = lookup->length;
+ if (unlikely (!subtable->finish_subtable (c->serializer,
+ bitmap_size_context->cbdt_prime->length,
+ num_glyphs,
+ &bitmap_size_context->size)))
+ return_trace (false);
+ return_trace (true);
+ }
+
+ bool add_new_record (hb_subset_context_t *c,
+ cblc_bitmap_size_subset_context_t *bitmap_size_context,
+ const hb_vector_t<hb_pair_t<hb_codepoint_t, const IndexSubtableRecord*>> *lookup, /* IN */
+ const void *base,
+ unsigned int *start, /* INOUT */
+ hb_vector_t<IndexSubtableRecord>* records /* INOUT */) const
{
- return (base+offsetToSubtable).get_extents (extents);
+ TRACE_SERIALIZE (this);
+ auto snap = c->serializer->snapshot ();
+ unsigned int old_size = bitmap_size_context->size;
+ unsigned int old_cbdt_prime_length = bitmap_size_context->cbdt_prime->length;
+
+ // Set to invalid state to indicate filling glyphs is not yet started.
+ records->resize (records->length + 1);
+ (*records)[records->length - 1].firstGlyphIndex = 1;
+ (*records)[records->length - 1].lastGlyphIndex = 0;
+ bitmap_size_context->size += IndexSubtableRecord::min_size;
+
+ c->serializer->push ();
+
+ if (unlikely (!add_new_subtable (c, bitmap_size_context, &((*records)[records->length - 1]), lookup, base, start)))
+ {
+ c->serializer->pop_discard ();
+ c->serializer->revert (snap);
+ bitmap_size_context->cbdt_prime->shrink (old_cbdt_prime_length);
+ bitmap_size_context->size = old_size;
+ records->resize (records->length - 1);
+ return_trace (false);
+ }
+
+ bitmap_size_context->num_tables += 1;
+ return_trace (true);
}
+ unsigned int add_glyph_for_subset (hb_codepoint_t gid)
+ {
+ if (firstGlyphIndex > lastGlyphIndex)
+ {
+ firstGlyphIndex = gid;
+ lastGlyphIndex = gid;
+ return 0;
+ }
+ // TODO maybe assert? this shouldn't occur.
+ if (lastGlyphIndex > gid)
+ return 0;
+ unsigned int num_missing = (unsigned int) (gid - lastGlyphIndex - 1);
+ lastGlyphIndex = gid;
+ return num_missing;
+ }
+
+ bool get_extents (hb_glyph_extents_t *extents, const void *base) const
+ { return (base+offsetToSubtable).get_extents (extents); }
+
bool get_image_data (unsigned int gid,
const void *base,
unsigned int *offset,
HBGlyphID lastGlyphIndex;
LOffsetTo<IndexSubtable> offsetToSubtable;
public:
- DEFINE_SIZE_STATIC(8);
+ DEFINE_SIZE_STATIC (8);
};
struct IndexSubtableArray
return_trace (indexSubtablesZ.sanitize (c, count, this));
}
+ void
+ build_lookup (hb_subset_context_t *c, cblc_bitmap_size_subset_context_t *bitmap_size_context,
+ hb_vector_t<hb_pair_t<hb_codepoint_t,
+ const IndexSubtableRecord*>> *lookup /* OUT */) const
+ {
+ bool start_glyph_is_set = false;
+ for (hb_codepoint_t new_gid = 0; new_gid < c->plan->num_output_glyphs (); new_gid++)
+ {
+ hb_codepoint_t old_gid;
+ if (unlikely (!c->plan->old_gid_for_new_gid (new_gid, &old_gid))) continue;
+
+ const IndexSubtableRecord* record = find_table (old_gid, bitmap_size_context->num_tables);
+ if (unlikely (!record)) continue;
+
+ // Don't add gaps to the lookup. The best way to determine if a glyph is a
+ // gap is that it has no image data.
+ unsigned int offset, length, format;
+ if (unlikely (!record->get_image_data (old_gid, this, &offset, &length, &format))) continue;
+
+ lookup->push (hb_pair_t<hb_codepoint_t, const IndexSubtableRecord*> (new_gid, record));
+
+ if (!start_glyph_is_set)
+ {
+ bitmap_size_context->start_glyph = new_gid;
+ start_glyph_is_set = true;
+ }
+
+ bitmap_size_context->end_glyph = new_gid;
+ }
+ }
+
+ bool
+ subset (hb_subset_context_t *c,
+ cblc_bitmap_size_subset_context_t *bitmap_size_context) const
+ {
+ TRACE_SUBSET (this);
+
+ auto *dst = c->serializer->start_embed<IndexSubtableArray> ();
+ if (unlikely (!dst)) return_trace (false);
+
+ hb_vector_t<hb_pair_t<hb_codepoint_t, const IndexSubtableRecord*>> lookup;
+ build_lookup (c, bitmap_size_context, &lookup);
+
+ bitmap_size_context->size = 0;
+ bitmap_size_context->num_tables = 0;
+ hb_vector_t<IndexSubtableRecord> records;
+ for (unsigned int start = 0; start < lookup.length;)
+ {
+ if (unlikely (!lookup[start].second->add_new_record (c, bitmap_size_context, &lookup, this, &start, &records)))
+ {
+ // Discard any leftover pushes to the serializer from successful records.
+ for (unsigned int i = 0; i < records.length; i++)
+ c->serializer->pop_discard ();
+ return_trace (false);
+ }
+ }
+
+ /* Workaround to ensure offset ordering is from least to greatest when
+ * resolving links. */
+ hb_vector_t<hb_serialize_context_t::objidx_t> objidxs;
+ for (unsigned int i = 0; i < records.length; i++)
+ objidxs.push (c->serializer->pop_pack ());
+ for (unsigned int i = 0; i < records.length; i++)
+ {
+ IndexSubtableRecord* record = c->serializer->embed (records[i]);
+ if (unlikely (!record)) return_trace (false);
+ c->serializer->add_link (record->offsetToSubtable, objidxs[records.length - 1 - i]);
+ }
+ return_trace (true);
+ }
+
public:
const IndexSubtableRecord* find_table (hb_codepoint_t glyph, unsigned int numTables) const
{
vertical.sanitize (c));
}
- const IndexSubtableRecord *find_table (hb_codepoint_t glyph,
- const void *base,
- const void **out_base) const
+ const IndexSubtableRecord *
+ find_table (hb_codepoint_t glyph, const void *base, const void **out_base) const
{
*out_base = &(base+indexSubtableArrayOffset);
return (base+indexSubtableArrayOffset).find_table (glyph, numberOfIndexSubtables);
}
+ bool
+ subset (hb_subset_context_t *c, const void *base,
+ const char *cbdt, unsigned int cbdt_length,
+ hb_vector_t<char> *cbdt_prime /* INOUT */) const
+ {
+ TRACE_SUBSET (this);
+ auto *out_table = c->serializer->embed (this);
+ if (unlikely (!out_table)) return_trace (false);
+
+ cblc_bitmap_size_subset_context_t bitmap_size_context;
+ bitmap_size_context.cbdt = cbdt;
+ bitmap_size_context.cbdt_length = cbdt_length;
+ bitmap_size_context.cbdt_prime = cbdt_prime;
+ bitmap_size_context.size = indexTablesSize;
+ bitmap_size_context.num_tables = numberOfIndexSubtables;
+ bitmap_size_context.start_glyph = 1;
+ bitmap_size_context.end_glyph = 0;
+
+ if (!out_table->indexSubtableArrayOffset.serialize_subset (c,
+ indexSubtableArrayOffset,
+ base,
+ &bitmap_size_context))
+ return_trace (false);
+ if (!bitmap_size_context.size ||
+ !bitmap_size_context.num_tables ||
+ bitmap_size_context.start_glyph > bitmap_size_context.end_glyph)
+ return_trace (false);
+
+ out_table->indexTablesSize = bitmap_size_context.size;
+ out_table->numberOfIndexSubtables = bitmap_size_context.num_tables;
+ out_table->startGlyphIndex = bitmap_size_context.start_glyph;
+ out_table->endGlyphIndex = bitmap_size_context.end_glyph;
+ return_trace (true);
+ }
+
protected:
LNNOffsetTo<IndexSubtableArray>
indexSubtableArrayOffset;
HBUINT8 bitDepth;
HBINT8 flags;
public:
- DEFINE_SIZE_STATIC(48);
+ DEFINE_SIZE_STATIC (48);
};
SmallGlyphMetrics glyphMetrics;
LArrayOf<HBUINT8> data;
public:
- DEFINE_SIZE_ARRAY(9, data);
+ DEFINE_SIZE_ARRAY (9, data);
};
struct GlyphBitmapDataFormat18
BigGlyphMetrics glyphMetrics;
LArrayOf<HBUINT8> data;
public:
- DEFINE_SIZE_ARRAY(12, data);
+ DEFINE_SIZE_ARRAY (12, data);
};
struct GlyphBitmapDataFormat19
{
LArrayOf<HBUINT8> data;
public:
- DEFINE_SIZE_ARRAY(4, data);
+ DEFINE_SIZE_ARRAY (4, data);
};
struct CBLC
sizeTables.sanitize (c, this));
}
+ static bool
+ sink_cbdt (hb_subset_context_t *c, hb_vector_t<char>* cbdt_prime)
+ {
+ hb_blob_t *cbdt_prime_blob = hb_blob_create (cbdt_prime->arrayZ,
+ cbdt_prime->length,
+ HB_MEMORY_MODE_WRITABLE,
+ cbdt_prime->arrayZ,
+ free);
+ cbdt_prime->init (); // Leak arrayZ to the blob.
+ bool ret = c->plan->add_table (HB_OT_TAG_CBDT, cbdt_prime_blob);
+ hb_blob_destroy (cbdt_prime_blob);
+ return ret;
+ }
+
+ bool
+ subset_size_table (hb_subset_context_t *c, const BitmapSizeTable& table,
+ const char *cbdt /* IN */, unsigned int cbdt_length,
+ CBLC *cblc_prime /* INOUT */, hb_vector_t<char> *cbdt_prime /* INOUT */) const
+ {
+ TRACE_SUBSET (this);
+ cblc_prime->sizeTables.len++;
+
+ auto snap = c->serializer->snapshot ();
+ auto cbdt_prime_len = cbdt_prime->length;
+
+ if (!table.subset (c, this, cbdt, cbdt_length, cbdt_prime))
+ {
+ cblc_prime->sizeTables.len--;
+ c->serializer->revert (snap);
+ cbdt_prime->shrink (cbdt_prime_len);
+ return_trace (false);
+ }
+ return_trace (true);
+ }
+
+ // Implemented in cc file as it depends on definition of CBDT.
+ HB_INTERNAL bool subset (hb_subset_context_t *c) const;
+
protected:
const BitmapSizeTable &choose_strike (hb_font_t *font) const
{
unsigned count = sizeTables.len;
if (unlikely (!count))
- return Null(BitmapSizeTable);
+ return Null (BitmapSizeTable);
unsigned int requested_ppem = hb_max (font->x_ppem, font->y_ppem);
if (!requested_ppem)
FixedVersion<> version;
LArrayOf<BitmapSizeTable> sizeTables;
public:
- DEFINE_SIZE_ARRAY(8, sizeTables);
+ DEFINE_SIZE_ARRAY (8, sizeTables);
};
struct CBDT
{
void init (hb_face_t *face)
{
- cblc = hb_sanitize_context_t().reference_table<CBLC> (face);
- cbdt = hb_sanitize_context_t().reference_table<CBDT> (face);
+ cblc = hb_sanitize_context_t ().reference_table<CBLC> (face);
+ cbdt = hb_sanitize_context_t ().reference_table<CBDT> (face);
upem = hb_face_get_upem (face);
}
this->cbdt.destroy ();
}
- bool get_extents (hb_font_t *font, hb_codepoint_t glyph,
- hb_glyph_extents_t *extents) const
+ bool
+ get_extents (hb_font_t *font, hb_codepoint_t glyph, hb_glyph_extents_t *extents) const
{
const void *base;
const BitmapSizeTable &strike = this->cblc->choose_strike (font);
if (!subtable_record->get_image_data (glyph, base, &image_offset, &image_length, &image_format))
return false;
+ unsigned int cbdt_len = cbdt.get_length ();
+ if (unlikely (image_offset > cbdt_len || cbdt_len - image_offset < image_length))
+ return false;
+
+ switch (image_format)
{
- unsigned int cbdt_len = cbdt.get_length ();
- if (unlikely (image_offset > cbdt_len || cbdt_len - image_offset < image_length))
+ case 17: {
+ if (unlikely (image_length < GlyphBitmapDataFormat17::min_size))
return false;
-
- switch (image_format)
- {
- case 17: {
- if (unlikely (image_length < GlyphBitmapDataFormat17::min_size))
- return false;
- const GlyphBitmapDataFormat17& glyphFormat17 =
- StructAtOffset<GlyphBitmapDataFormat17> (this->cbdt, image_offset);
- glyphFormat17.glyphMetrics.get_extents (font, extents);
- break;
- }
- case 18: {
- if (unlikely (image_length < GlyphBitmapDataFormat18::min_size))
- return false;
- const GlyphBitmapDataFormat18& glyphFormat18 =
- StructAtOffset<GlyphBitmapDataFormat18> (this->cbdt, image_offset);
- glyphFormat18.glyphMetrics.get_extents (font, extents);
- break;
- }
- default:
- // TODO: Support other image formats.
- return false;
- }
+ auto &glyphFormat17 = StructAtOffset<GlyphBitmapDataFormat17> (this->cbdt, image_offset);
+ glyphFormat17.glyphMetrics.get_extents (font, extents);
+ break;
+ }
+ case 18: {
+ if (unlikely (image_length < GlyphBitmapDataFormat18::min_size))
+ return false;
+ auto &glyphFormat18 = StructAtOffset<GlyphBitmapDataFormat18> (this->cbdt, image_offset);
+ glyphFormat18.glyphMetrics.get_extents (font, extents);
+ break;
+ }
+ default: return false; /* TODO: Support other image formats. */
}
/* Convert to font units. */
return true;
}
- hb_blob_t* reference_png (hb_font_t *font,
- hb_codepoint_t glyph) const
+ hb_blob_t*
+ reference_png (hb_font_t *font, hb_codepoint_t glyph) const
{
const void *base;
const BitmapSizeTable &strike = this->cblc->choose_strike (font);
if (!subtable_record->get_image_data (glyph, base, &image_offset, &image_length, &image_format))
return hb_blob_get_empty ();
+ unsigned int cbdt_len = cbdt.get_length ();
+ if (unlikely (image_offset > cbdt_len || cbdt_len - image_offset < image_length))
+ return hb_blob_get_empty ();
+
+ switch (image_format)
+ {
+ case 17:
{
- unsigned int cbdt_len = cbdt.get_length ();
- if (unlikely (image_offset > cbdt_len || cbdt_len - image_offset < image_length))
+ if (unlikely (image_length < GlyphBitmapDataFormat17::min_size))
return hb_blob_get_empty ();
-
- switch (image_format)
- {
- case 17: {
- if (unlikely (image_length < GlyphBitmapDataFormat17::min_size))
- return hb_blob_get_empty ();
- const GlyphBitmapDataFormat17& glyphFormat17 =
- StructAtOffset<GlyphBitmapDataFormat17> (this->cbdt, image_offset);
- return hb_blob_create_sub_blob (cbdt.get_blob (),
- image_offset + GlyphBitmapDataFormat17::min_size,
- glyphFormat17.data.len);
- }
- case 18: {
- if (unlikely (image_length < GlyphBitmapDataFormat18::min_size))
- return hb_blob_get_empty ();
- const GlyphBitmapDataFormat18& glyphFormat18 =
- StructAtOffset<GlyphBitmapDataFormat18> (this->cbdt, image_offset);
- return hb_blob_create_sub_blob (cbdt.get_blob (),
- image_offset + GlyphBitmapDataFormat18::min_size,
- glyphFormat18.data.len);
- }
- case 19: {
- if (unlikely (image_length < GlyphBitmapDataFormat19::min_size))
- return hb_blob_get_empty ();
- const GlyphBitmapDataFormat19& glyphFormat19 =
- StructAtOffset<GlyphBitmapDataFormat19> (this->cbdt, image_offset);
- return hb_blob_create_sub_blob (cbdt.get_blob (),
- image_offset + GlyphBitmapDataFormat19::min_size,
- glyphFormat19.data.len);
- }
- }
+ auto &glyphFormat17 = StructAtOffset<GlyphBitmapDataFormat17> (this->cbdt, image_offset);
+ return hb_blob_create_sub_blob (cbdt.get_blob (),
+ image_offset + GlyphBitmapDataFormat17::min_size,
+ glyphFormat17.data.len);
+ }
+ case 18:
+ {
+ if (unlikely (image_length < GlyphBitmapDataFormat18::min_size))
+ return hb_blob_get_empty ();
+ auto &glyphFormat18 = StructAtOffset<GlyphBitmapDataFormat18> (this->cbdt, image_offset);
+ return hb_blob_create_sub_blob (cbdt.get_blob (),
+ image_offset + GlyphBitmapDataFormat18::min_size,
+ glyphFormat18.data.len);
+ }
+ case 19:
+ {
+ if (unlikely (image_length < GlyphBitmapDataFormat19::min_size))
+ return hb_blob_get_empty ();
+ auto &glyphFormat19 = StructAtOffset<GlyphBitmapDataFormat19> (this->cbdt, image_offset);
+ return hb_blob_create_sub_blob (cbdt.get_blob (),
+ image_offset + GlyphBitmapDataFormat19::min_size,
+ glyphFormat19.data.len);
+ }
+ default: return hb_blob_get_empty (); /* TODO: Support other image formats. */
}
-
- return hb_blob_get_empty ();
}
bool has_data () const { return cbdt.get_length (); }
FixedVersion<> version;
UnsizedArrayOf<HBUINT8> dataZ;
public:
- DEFINE_SIZE_ARRAY(4, dataZ);
+ DEFINE_SIZE_ARRAY (4, dataZ);
};
+inline bool
+CBLC::subset (hb_subset_context_t *c) const
+{
+ TRACE_SUBSET (this);
+
+ auto *cblc_prime = c->serializer->start_embed<CBLC> ();
+
+ // Use a vector as a secondary buffer as the tables need to be built in parallel.
+ hb_vector_t<char> cbdt_prime;
+
+ if (unlikely (!cblc_prime)) return_trace (false);
+ if (unlikely (!c->serializer->extend_min (cblc_prime))) return_trace (false);
+ cblc_prime->version = version;
+
+ hb_blob_t* cbdt_blob = hb_sanitize_context_t ().reference_table<CBDT> (c->plan->source);
+ unsigned int cbdt_length;
+ CBDT* cbdt = (CBDT *) hb_blob_get_data (cbdt_blob, &cbdt_length);
+ if (unlikely (cbdt_length < CBDT::min_size))
+ {
+ hb_blob_destroy (cbdt_blob);
+ return_trace (false);
+ }
+ _copy_data_to_cbdt (&cbdt_prime, cbdt, CBDT::min_size);
+
+ for (const BitmapSizeTable& table : + sizeTables.iter ())
+ subset_size_table (c, table, (const char *) cbdt, cbdt_length, cblc_prime, &cbdt_prime);
+
+ hb_blob_destroy (cbdt_blob);
+
+ return_trace (CBLC::sink_cbdt (c, &cbdt_prime));
+}
+
struct CBDT_accelerator_t : CBDT::accelerator_t {};
} /* namespace OT */
projects / platform / upstream / harfbuzz.git / blobdiff