struct DeviceRecord
{
- struct SubsetView
- {
- const DeviceRecord *source_device_record;
- unsigned int sizeDeviceRecord;
- hb_subset_plan_t *subset_plan;
-
- void init (const DeviceRecord *source_device_record,
- unsigned int sizeDeviceRecord,
- hb_subset_plan_t *subset_plan)
- {
- this->source_device_record = source_device_record;
- this->sizeDeviceRecord = sizeDeviceRecord;
- this->subset_plan = subset_plan;
- }
-
- unsigned int len () const
- { return this->subset_plan->num_output_glyphs (); }
-
- const HBUINT8* operator [] (unsigned int new_gid) const
- {
- if (unlikely (new_gid >= len ())) return nullptr;
-
- hb_codepoint_t old_gid;
- if (!this->subset_plan->old_gid_for_new_gid (new_gid, &old_gid))
- return &Null(HBUINT8);
-
- if (old_gid >= sizeDeviceRecord - DeviceRecord::min_size)
- return nullptr;
- return &(this->source_device_record->widthsZ[old_gid]);
- }
- };
-
- static unsigned int get_size (unsigned int count)
+ static unsigned int get_size (unsigned count)
{ return hb_ceil_to_4 (min_size + count * HBUINT8::static_size); }
- bool serialize (hb_serialize_context_t *c, const SubsetView &subset_view)
+ template<typename Iterator,
+ hb_requires (hb_is_iterator (Iterator))>
+ bool serialize (hb_serialize_context_t *c, unsigned pixelSize, Iterator it)
{
TRACE_SERIALIZE (this);
- unsigned int size = get_size (subset_view.len ());
- if (unlikely (!c->allocate_size<DeviceRecord> (size)))
- {
- DEBUG_MSG(SUBSET, nullptr, "Couldn't allocate enough space for DeviceRecord: %d.",
- size);
- return_trace (false);
- }
-
- this->pixelSize.set (subset_view.source_device_record->pixelSize);
- this->maxWidth.set (subset_view.source_device_record->maxWidth);
-
- for (unsigned int i = 0; i < subset_view.len (); i++)
- {
- const HBUINT8 *width = subset_view[i];
- if (!width)
- {
- DEBUG_MSG(SUBSET, nullptr, "HDMX width for new gid %d is missing.", i);
- return_trace (false);
- }
- widthsZ[i].set (*width);
- }
+ unsigned length = it.len ();
+
+ if (unlikely (!c->extend (*this, length))) return_trace (false);
+
+ this->pixelSize = pixelSize;
+ this->maxWidth =
+ + it
+ | hb_reduce (hb_max, 0u);
+
+ + it
+ | hb_sink (widthsZ.as_array (length));
return_trace (true);
}
- bool sanitize (hb_sanitize_context_t *c, unsigned int sizeDeviceRecord) const
+ bool sanitize (hb_sanitize_context_t *c, unsigned sizeDeviceRecord) const
{
TRACE_SANITIZE (this);
return_trace (likely (c->check_struct (this) &&
return StructAtOffset<DeviceRecord> (&this->firstDeviceRecord, i * sizeDeviceRecord);
}
- bool serialize (hb_serialize_context_t *c, const hdmx *source_hdmx, hb_subset_plan_t *plan)
+ template<typename Iterator,
+ hb_requires (hb_is_iterator (Iterator))>
+ bool serialize (hb_serialize_context_t *c, unsigned version, Iterator it)
{
TRACE_SERIALIZE (this);
if (unlikely (!c->extend_min ((*this)))) return_trace (false);
- this->version.set (source_hdmx->version);
- this->numRecords.set (source_hdmx->numRecords);
- this->sizeDeviceRecord.set (DeviceRecord::get_size (plan->num_output_glyphs ()));
+ this->version = version;
+ this->numRecords = it.len ();
+ this->sizeDeviceRecord = DeviceRecord::get_size (it ? (*it).second.len () : 0);
- for (unsigned int i = 0; i < source_hdmx->numRecords; i++)
- {
- DeviceRecord::SubsetView subset_view;
- subset_view.init (&(*source_hdmx)[i], source_hdmx->sizeDeviceRecord, plan);
+ for (const hb_item_type<Iterator>& _ : +it)
+ c->start_embed<DeviceRecord> ()->serialize (c, _.first, _.second);
- if (!c->start_embed<DeviceRecord> ()->serialize (c, subset_view))
- return_trace (false);
- }
-
- return_trace (true);
+ return_trace (c->successful);
}
- static size_t get_subsetted_size (const hdmx *source_hdmx, hb_subset_plan_t *plan)
+
+ bool subset (hb_subset_context_t *c) const
{
- return min_size + source_hdmx->numRecords * DeviceRecord::get_size (plan->num_output_glyphs ());
+ TRACE_SUBSET (this);
+
+ hdmx *hdmx_prime = c->serializer->start_embed <hdmx> ();
+ if (unlikely (!hdmx_prime)) return_trace (false);
+
+ auto it =
+ + hb_range ((unsigned) numRecords)
+ | hb_map ([c, this] (unsigned _)
+ {
+ const DeviceRecord *device_record =
+ &StructAtOffset<DeviceRecord> (&firstDeviceRecord,
+ _ * sizeDeviceRecord);
+ auto row =
+ + hb_range (c->plan->num_output_glyphs ())
+ | hb_map (c->plan->reverse_glyph_map)
+ | hb_map ([this, c, device_record] (hb_codepoint_t _)
+ {
+ if (c->plan->is_empty_glyph (_))
+ return Null (HBUINT8);
+ return device_record->widthsZ.as_array (get_num_glyphs ()) [_];
+ })
+ ;
+ return hb_pair ((unsigned) device_record->pixelSize, +row);
+ })
+ ;
+
+ hdmx_prime->serialize (c->serializer, version, it);
+ return_trace (true);
}
- bool subset (hb_subset_plan_t *plan) const
+ unsigned get_num_glyphs () const
{
- size_t dest_size = get_subsetted_size (this, plan);
- hdmx *dest = (hdmx *) malloc (dest_size);
- if (unlikely (!dest))
- {
- DEBUG_MSG(SUBSET, nullptr, "Unable to alloc %lu for hdmx subset output.", (unsigned long) dest_size);
- return false;
- }
-
- hb_serialize_context_t c (dest, dest_size);
- hdmx *hdmx_prime = c.start_serialize<hdmx> ();
- if (!hdmx_prime || !hdmx_prime->serialize (&c, this, plan))
- {
- free (dest);
- DEBUG_MSG(SUBSET, nullptr, "Failed to serialize write new hdmx.");
- return false;
- }
- c.end_serialize ();
-
- hb_blob_t *hdmx_prime_blob = hb_blob_create ((const char *) dest,
- dest_size,
- HB_MEMORY_MODE_READONLY,
- dest,
- free);
- bool result = plan->add_table (HB_OT_TAG_hdmx, hdmx_prime_blob);
- hb_blob_destroy (hdmx_prime_blob);
-
- return result;
+ return sizeDeviceRecord - DeviceRecord::min_size;
}
bool sanitize (hb_sanitize_context_t *c) const
}
protected:
- HBUINT16 version; /* Table version number (0) */
- HBUINT16 numRecords; /* Number of device records. */
- HBUINT32 sizeDeviceRecord; /* Size of a device record, 32-bit aligned. */
- DeviceRecord firstDeviceRecord; /* Array of device records. */
+ HBUINT16 version; /* Table version number (0) */
+ HBUINT16 numRecords; /* Number of device records. */
+ HBUINT32 sizeDeviceRecord;
+ /* Size of a device record, 32-bit aligned. */
+ DeviceRecord firstDeviceRecord;
+ /* Array of device records. */
public:
DEFINE_SIZE_MIN (8);
};
projects / platform / upstream / harfbuzz.git / blobdiff