--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-hdmx-table.hh Fri Mar 01 16:59:19 2019 -0800
@@ -0,0 +1,214 @@
+/*
+ * 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.hh"
+
+/*
+ * hdmx -- Horizontal Device Metrics
+ * https://docs.microsoft.com/en-us/typography/opentype/spec/hdmx
+ */
+#define HB_OT_TAG_hdmx HB_TAG('h','d','m','x')
+
+
+namespace OT {
+
+
+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->glyphs.length; }
+
+ const HBUINT8* operator [] (unsigned int i) const
+ {
+ if (unlikely (i >= len ())) return nullptr;
+ hb_codepoint_t gid = this->subset_plan->glyphs [i];
+
+ if (gid >= sizeDeviceRecord - DeviceRecord::min_size)
+ return nullptr;
+ return &(this->source_device_record->widthsZ[gid]);
+ }
+ };
+
+ static unsigned int get_size (unsigned int count)
+ { return hb_ceil_to_4 (min_size + count * HBUINT8::static_size); }
+
+ bool serialize (hb_serialize_context_t *c, const SubsetView &subset_view)
+ {
+ 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);
+ }
+
+ return_trace (true);
+ }
+
+ bool sanitize (hb_sanitize_context_t *c, unsigned int sizeDeviceRecord) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (likely (c->check_struct (this) &&
+ c->check_range (this, sizeDeviceRecord)));
+ }
+
+ HBUINT8 pixelSize; /* Pixel size for following widths (as ppem). */
+ HBUINT8 maxWidth; /* Maximum width. */
+ UnsizedArrayOf<HBUINT8> widthsZ; /* Array of widths (numGlyphs is from the 'maxp' table). */
+ public:
+ DEFINE_SIZE_ARRAY (2, widthsZ);
+};
+
+
+struct hdmx
+{
+ static constexpr hb_tag_t tableTag = HB_OT_TAG_hdmx;
+
+ unsigned int get_size () const
+ { return min_size + numRecords * sizeDeviceRecord; }
+
+ const DeviceRecord& operator [] (unsigned int i) const
+ {
+ /* XXX Null(DeviceRecord) is NOT safe as it's num-glyphs lengthed.
+ * https://github.com/harfbuzz/harfbuzz/issues/1300 */
+ if (unlikely (i >= numRecords)) return Null (DeviceRecord);
+ return StructAtOffset<DeviceRecord> (&this->firstDeviceRecord, i * sizeDeviceRecord);
+ }
+
+ 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->numRecords.set (source_hdmx->numRecords);
+ this->sizeDeviceRecord.set (DeviceRecord::get_size (plan->glyphs.length));
+
+ for (unsigned int i = 0; i < source_hdmx->numRecords; i++)
+ {
+ DeviceRecord::SubsetView subset_view;
+ subset_view.init (&(*source_hdmx)[i], source_hdmx->sizeDeviceRecord, plan);
+
+ if (!c->start_embed<DeviceRecord> ()->serialize (c, subset_view))
+ return_trace (false);
+ }
+
+ return_trace (true);
+ }
+
+ static size_t get_subsetted_size (const hdmx *source_hdmx, hb_subset_plan_t *plan)
+ {
+ return min_size + source_hdmx->numRecords * DeviceRecord::get_size (plan->glyphs.length);
+ }
+
+ bool subset (hb_subset_plan_t *plan) 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;
+ }
+
+ bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ !hb_unsigned_mul_overflows (numRecords, sizeDeviceRecord) &&
+ sizeDeviceRecord >= DeviceRecord::min_size &&
+ c->check_range (this, get_size ()));
+ }
+
+ 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. */
+ public:
+ DEFINE_SIZE_MIN (8);
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_HDMX_TABLE_HH */