diff options
author | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2018-03-07 22:32:14 +0000 |
---|---|---|
committer | Akira Kakuto <kakuto@fuk.kindai.ac.jp> | 2018-03-07 22:32:14 +0000 |
commit | ef9282421b00185a4962b7d22b96e979687258e2 (patch) | |
tree | b6d0d8c700086d3141e228187693a26b102c971f /Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh | |
parent | 55fbdeae2498166ec7c7301fd48d990fc9010058 (diff) |
harfbuzz-1.7.6
git-svn-id: svn://tug.org/texlive/trunk@46877 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh new file mode 100644 index 00000000000..f08fe39d8be --- /dev/null +++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh @@ -0,0 +1,198 @@ +/* + * Copyright © 2018 Google, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Google Author(s): Garret Rieger + */ + +#ifndef HB_OT_HDMX_TABLE_HH +#define HB_OT_HDMX_TABLE_HH + +#include "hb-open-type-private.hh" + +namespace OT { + + +/* + * hdmx - Horizontal Device Metric + */ + +#define HB_OT_TAG_hdmx HB_TAG('h','d','m','x') + +struct DeviceRecord +{ + struct SubsetView + { + const DeviceRecord *source_device_record; + hb_subset_plan_t *subset_plan; + + inline void init(const DeviceRecord *source_device_record, + hb_subset_plan_t *subset_plan) + { + this->source_device_record = source_device_record; + this->subset_plan = subset_plan; + } + + inline unsigned int len () const + { + return this->subset_plan->gids_to_retain_sorted.len; + } + + inline const HBUINT8& operator [] (unsigned int i) const + { + if (unlikely (i >= len())) return Null(HBUINT8); + hb_codepoint_t gid = this->subset_plan->gids_to_retain_sorted [i]; + return this->source_device_record->widths[gid]; + } + }; + + static inline unsigned int get_size (unsigned int count) + { + unsigned int raw_size = min_size + count * HBUINT8::static_size; + if (raw_size % 4) + /* Align to 32 bits */ + return raw_size + (4 - (raw_size % 4)); + return raw_size; + } + + inline bool serialize (hb_serialize_context_t *c, const SubsetView &subset_view) + { + TRACE_SERIALIZE (this); + + if (unlikely (!c->allocate_size<DeviceRecord> (get_size (subset_view.len())))) + return_trace (false); + + this->pixel_size.set (subset_view.source_device_record->pixel_size); + this->max_width.set (subset_view.source_device_record->max_width); + + for (unsigned int i = 0; i < subset_view.len(); i++) + widths[i].set (subset_view[i]); + + return_trace (true); + } + + inline bool sanitize (hb_sanitize_context_t *c, unsigned int size_device_record) const + { + TRACE_SANITIZE (this); + return_trace (likely (c->check_struct (this) && + c->check_range (this, size_device_record))); + } + + HBUINT8 pixel_size; /* Pixel size for following widths (as ppem). */ + HBUINT8 max_width; /* Maximum width. */ + HBUINT8 widths[VAR]; /* Array of widths (numGlyphs is from the 'maxp' table). */ + public: + DEFINE_SIZE_ARRAY (2, widths); +}; + + +struct hdmx +{ + static const hb_tag_t tableTag = HB_OT_TAG_hdmx; + + inline unsigned int get_size (void) const + { + return min_size + num_records * size_device_record; + } + + inline const DeviceRecord& operator [] (unsigned int i) const + { + if (unlikely (i >= num_records)) return Null(DeviceRecord); + return StructAtOffset<DeviceRecord> (this, min_size + i * size_device_record); + } + + inline bool serialize (hb_serialize_context_t *c, const hdmx *source_hdmx, hb_subset_plan_t *plan) + { + TRACE_SERIALIZE (this); + + if (unlikely (!c->extend_min ((*this)))) return_trace (false); + + this->version.set (source_hdmx->version); + this->num_records.set (source_hdmx->num_records); + this->size_device_record.set (DeviceRecord::get_size (plan->gids_to_retain_sorted.len)); + + for (unsigned int i = 0; i < source_hdmx->num_records; i++) + { + DeviceRecord::SubsetView subset_view; + subset_view.init (&(*source_hdmx)[i], plan); + + c->start_embed<DeviceRecord> ()->serialize (c, subset_view); + } + + return_trace (true); + } + + static inline size_t get_subsetted_size (hb_subset_plan_t *plan) + { + return min_size + DeviceRecord::get_size (plan->gids_to_retain_sorted.len); + } + + inline bool subset (hb_subset_plan_t *plan) const + { + size_t dest_size = get_subsetted_size (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); + 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 = hb_subset_plan_add_table (plan, HB_OT_TAG_hdmx, hdmx_prime_blob); + hb_blob_destroy (hdmx_prime_blob); + + return result; + } + + inline bool sanitize (hb_sanitize_context_t *c) const + { + TRACE_SANITIZE (this); + return_trace (c->check_struct (this) && version == 0 && + !_hb_unsigned_int_mul_overflows (num_records, size_device_record) && + c->check_range (this, get_size())); + } + + protected: + HBUINT16 version; /* Table version number (0) */ + HBUINT16 num_records; /* Number of device records. */ + HBUINT32 size_device_record; /* Size of a device record, 32-bit aligned. */ + HBUINT8 data[VAR]; /* Array of device records. */ + public: + DEFINE_SIZE_ARRAY (8, data); +}; + +} /* namespace OT */ + + +#endif /* HB_OT_HDMX_TABLE_HH */ |