--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/native/libfontmanager/harfbuzz/hb-ot-var-fvar-table.hh Thu Dec 07 11:55:06 2017 -0800
@@ -0,0 +1,209 @@
+/*
+ * Copyright © 2017 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): Behdad Esfahbod
+ */
+
+#ifndef HB_OT_VAR_FVAR_TABLE_HH
+#define HB_OT_VAR_FVAR_TABLE_HH
+
+#include "hb-open-type-private.hh"
+
+namespace OT {
+
+
+struct InstanceRecord
+{
+ inline bool sanitize (hb_sanitize_context_t *c, unsigned int axis_count) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this) &&
+ c->check_array (coordinates, coordinates[0].static_size, axis_count));
+ }
+
+ protected:
+ USHORT subfamilyNameID;/* The name ID for entries in the 'name' table
+ * that provide subfamily names for this instance. */
+ USHORT reserved; /* Reserved for future use — set to 0. */
+ Fixed coordinates[VAR];/* The coordinates array for this instance. */
+ //USHORT postScriptNameIDX;/*Optional. The name ID for entries in the 'name'
+ // * table that provide PostScript names for this
+ // * instance. */
+
+ public:
+ DEFINE_SIZE_ARRAY (4, coordinates);
+};
+
+struct AxisRecord
+{
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (c->check_struct (this));
+ }
+
+ public:
+ Tag axisTag; /* Tag identifying the design variation for the axis. */
+ Fixed minValue; /* The minimum coordinate value for the axis. */
+ Fixed defaultValue; /* The default coordinate value for the axis. */
+ Fixed maxValue; /* The maximum coordinate value for the axis. */
+ USHORT reserved; /* Reserved for future use — set to 0. */
+ USHORT axisNameID; /* The name ID for entries in the 'name' table that
+ * provide a display name for this axis. */
+
+ public:
+ DEFINE_SIZE_STATIC (20);
+};
+
+
+/*
+ * fvar — Font Variations Table
+ */
+
+#define HB_OT_TAG_fvar HB_TAG('f','v','a','r')
+
+struct fvar
+{
+ static const hb_tag_t tableTag = HB_OT_TAG_fvar;
+
+ inline bool sanitize (hb_sanitize_context_t *c) const
+ {
+ TRACE_SANITIZE (this);
+ return_trace (version.sanitize (c) &&
+ likely (version.major == 1) &&
+ c->check_struct (this) &&
+ instanceSize >= axisCount * 4 + 4 &&
+ axisSize <= 1024 && /* Arbitrary, just to simplify overflow checks. */
+ instanceSize <= 1024 && /* Arbitrary, just to simplify overflow checks. */
+ c->check_range (this, things) &&
+ c->check_range (&StructAtOffset<char> (this, things),
+ axisCount * axisSize + instanceCount * instanceSize));
+ }
+
+ inline unsigned int get_axis_count (void) const
+ { return axisCount; }
+
+ inline bool get_axis (unsigned int index, hb_ot_var_axis_t *info) const
+ {
+ if (unlikely (index >= axisCount))
+ return false;
+
+ if (info)
+ {
+ const AxisRecord &axis = get_axes ()[index];
+ info->tag = axis.axisTag;
+ info->name_id = axis.axisNameID;
+ info->default_value = axis.defaultValue / 65536.;
+ /* Ensure order, to simplify client math. */
+ info->min_value = MIN<float> (info->default_value, axis.minValue / 65536.);
+ info->max_value = MAX<float> (info->default_value, axis.maxValue / 65536.);
+ }
+
+ return true;
+ }
+
+ inline unsigned int get_axis_infos (unsigned int start_offset,
+ unsigned int *axes_count /* IN/OUT */,
+ hb_ot_var_axis_t *axes_array /* OUT */) const
+ {
+ if (axes_count)
+ {
+ unsigned int count = axisCount;
+ start_offset = MIN (start_offset, count);
+
+ count -= start_offset;
+ axes_array += start_offset;
+
+ count = MIN (count, *axes_count);
+ *axes_count = count;
+
+ for (unsigned int i = 0; i < count; i++)
+ get_axis (start_offset + i, axes_array + i);
+ }
+ return axisCount;
+ }
+
+ inline bool find_axis (hb_tag_t tag, unsigned int *index, hb_ot_var_axis_t *info) const
+ {
+ const AxisRecord *axes = get_axes ();
+ unsigned int count = get_axis_count ();
+ for (unsigned int i = 0; i < count; i++)
+ if (axes[i].axisTag == tag)
+ {
+ if (index)
+ *index = i;
+ return get_axis (i, info);
+ }
+ if (index)
+ *index = HB_OT_VAR_NO_AXIS_INDEX;
+ return false;
+ }
+
+ inline int normalize_axis_value (unsigned int axis_index, float v) const
+ {
+ hb_ot_var_axis_t axis;
+ if (!get_axis (axis_index, &axis))
+ return 0;
+
+ v = MAX (MIN (v, axis.max_value), axis.min_value); /* Clamp. */
+
+ if (v == axis.default_value)
+ return 0;
+ else if (v < axis.default_value)
+ v = (v - axis.default_value) / (axis.default_value - axis.min_value);
+ else
+ v = (v - axis.default_value) / (axis.max_value - axis.default_value);
+ return (int) (v * 16384. + (v >= 0. ? .5 : -.5));
+ }
+
+ protected:
+ inline const AxisRecord * get_axes (void) const
+ { return &StructAtOffset<AxisRecord> (this, things); }
+
+ inline const InstanceRecord * get_instances (void) const
+ { return &StructAtOffset<InstanceRecord> (get_axes () + axisCount, 0); }
+
+ protected:
+ FixedVersion<>version; /* Version of the fvar table
+ * initially set to 0x00010000u */
+ Offset<> things; /* Offset in bytes from the beginning of the table
+ * to the start of the AxisRecord array. */
+ USHORT reserved; /* This field is permanently reserved. Set to 2. */
+ USHORT axisCount; /* The number of variation axes in the font (the
+ * number of records in the axes array). */
+ USHORT axisSize; /* The size in bytes of each VariationAxisRecord —
+ * set to 20 (0x0014) for this version. */
+ USHORT instanceCount; /* The number of named instances defined in the font
+ * (the number of records in the instances array). */
+ USHORT instanceSize; /* The size in bytes of each InstanceRecord — set
+ * to either axisCount * sizeof(Fixed) + 4, or to
+ * axisCount * sizeof(Fixed) + 6. */
+
+ public:
+ DEFINE_SIZE_STATIC (16);
+};
+
+} /* namespace OT */
+
+
+#endif /* HB_OT_VAR_FVAR_TABLE_HH */