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authorAkira Kakuto <kakuto@fuk.kindai.ac.jp>2018-03-07 22:32:14 +0000
committerAkira Kakuto <kakuto@fuk.kindai.ac.jp>2018-03-07 22:32:14 +0000
commitef9282421b00185a4962b7d22b96e979687258e2 (patch)
treeb6d0d8c700086d3141e228187693a26b102c971f /Build/source/libs/harfbuzz/harfbuzz-src/src/hb-ot-hdmx-table.hh
parent55fbdeae2498166ec7c7301fd48d990fc9010058 (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')
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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
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+/*
+ * 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 */