281 lines
9.0 KiB
C++
281 lines
9.0 KiB
C++
/*
|
|
* Copyright © 2018 Ebrahim Byagowi
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef HB_OT_STAT_TABLE_HH
|
|
#define HB_OT_STAT_TABLE_HH
|
|
|
|
#include "hb-open-type.hh"
|
|
#include "hb-ot-layout-common.hh"
|
|
|
|
/*
|
|
* STAT -- Style Attributes
|
|
* https://docs.microsoft.com/en-us/typography/opentype/spec/stat
|
|
*/
|
|
#define HB_OT_TAG_STAT HB_TAG('S','T','A','T')
|
|
|
|
|
|
namespace OT {
|
|
|
|
enum
|
|
{
|
|
OLDER_SIBLING_FONT_ATTRIBUTE = 0x0001, /* If set, this axis value table
|
|
* provides axis value information
|
|
* that is applicable to other fonts
|
|
* within the same font family. This
|
|
* is used if the other fonts were
|
|
* released earlier and did not include
|
|
* information about values for some axis.
|
|
* If newer versions of the other
|
|
* fonts include the information
|
|
* themselves and are present,
|
|
* then this record is ignored. */
|
|
ELIDABLE_AXIS_VALUE_NAME = 0x0002 /* If set, it indicates that the axis
|
|
* value represents the “normal” value
|
|
* for the axis and may be omitted when
|
|
* composing name strings. */
|
|
// Reserved = 0xFFFC /* Reserved for future use — set to zero. */
|
|
};
|
|
|
|
struct AxisValueFormat1
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 format; /* Format identifier — set to 1. */
|
|
HBUINT16 axisIndex; /* Zero-base index into the axis record array
|
|
* identifying the axis of design variation
|
|
* to which the axis value record applies.
|
|
* Must be less than designAxisCount. */
|
|
HBUINT16 flags; /* Flags — see below for details. */
|
|
NameID valueNameID; /* The name ID for entries in the 'name' table
|
|
* that provide a display string for this
|
|
* attribute value. */
|
|
Fixed value; /* A numeric value for this attribute value. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (12);
|
|
};
|
|
|
|
struct AxisValueFormat2
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 format; /* Format identifier — set to 2. */
|
|
HBUINT16 axisIndex; /* Zero-base index into the axis record array
|
|
* identifying the axis of design variation
|
|
* to which the axis value record applies.
|
|
* Must be less than designAxisCount. */
|
|
HBUINT16 flags; /* Flags — see below for details. */
|
|
NameID valueNameID; /* The name ID for entries in the 'name' table
|
|
* that provide a display string for this
|
|
* attribute value. */
|
|
Fixed nominalValue; /* A numeric value for this attribute value. */
|
|
Fixed rangeMinValue; /* The minimum value for a range associated
|
|
* with the specified name ID. */
|
|
Fixed rangeMaxValue; /* The maximum value for a range associated
|
|
* with the specified name ID. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (20);
|
|
};
|
|
|
|
struct AxisValueFormat3
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 format; /* Format identifier — set to 3. */
|
|
HBUINT16 axisIndex; /* Zero-base index into the axis record array
|
|
* identifying the axis of design variation
|
|
* to which the axis value record applies.
|
|
* Must be less than designAxisCount. */
|
|
HBUINT16 flags; /* Flags — see below for details. */
|
|
NameID valueNameID; /* The name ID for entries in the 'name' table
|
|
* that provide a display string for this
|
|
* attribute value. */
|
|
Fixed value; /* A numeric value for this attribute value. */
|
|
Fixed linkedValue; /* The numeric value for a style-linked mapping
|
|
* from this value. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (16);
|
|
};
|
|
|
|
struct AxisValueRecord
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 axisIndex; /* Zero-base index into the axis record array
|
|
* identifying the axis to which this value
|
|
* applies. Must be less than designAxisCount. */
|
|
Fixed value; /* A numeric value for this attribute value. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (6);
|
|
};
|
|
|
|
struct AxisValueFormat4
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 format; /* Format identifier — set to 4. */
|
|
HBUINT16 axisCount; /* The total number of axes contributing to
|
|
* this axis-values combination. */
|
|
HBUINT16 flags; /* Flags — see below for details. */
|
|
NameID valueNameID; /* The name ID for entries in the 'name' table
|
|
* that provide a display string for this
|
|
* attribute value. */
|
|
UnsizedArrayOf<AxisValueRecord>
|
|
axisValues; /* Array of AxisValue records that provide the
|
|
* combination of axis values, one for each
|
|
* contributing axis. */
|
|
public:
|
|
DEFINE_SIZE_ARRAY (8, axisValues);
|
|
};
|
|
|
|
struct AxisValue
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
if (unlikely (c->check_struct (this)))
|
|
return_trace (false);
|
|
|
|
switch (u.format)
|
|
{
|
|
case 1: return_trace (likely (u.format1.sanitize (c)));
|
|
case 2: return_trace (likely (u.format2.sanitize (c)));
|
|
case 3: return_trace (likely (u.format3.sanitize (c)));
|
|
case 4: return_trace (likely (u.format4.sanitize (c)));
|
|
default: return_trace (true);
|
|
}
|
|
}
|
|
|
|
protected:
|
|
union
|
|
{
|
|
HBUINT16 format;
|
|
AxisValueFormat1 format1;
|
|
AxisValueFormat2 format2;
|
|
AxisValueFormat3 format3;
|
|
AxisValueFormat4 format4;
|
|
} u;
|
|
public:
|
|
DEFINE_SIZE_UNION (2, format);
|
|
};
|
|
|
|
struct StatAxisRecord
|
|
{
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this)));
|
|
}
|
|
|
|
protected:
|
|
Tag tag; /* A tag identifying the axis of design variation. */
|
|
NameID nameID; /* The name ID for entries in the 'name' table that
|
|
* provide a display string for this axis. */
|
|
HBUINT16 ordering; /* A value that applications can use to determine
|
|
* primary sorting of face names, or for ordering
|
|
* of descriptors when composing family or face names. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (8);
|
|
};
|
|
|
|
struct STAT
|
|
{
|
|
static constexpr hb_tag_t tableTag = HB_OT_TAG_STAT;
|
|
|
|
bool sanitize (hb_sanitize_context_t *c) const
|
|
{
|
|
TRACE_SANITIZE (this);
|
|
return_trace (likely (c->check_struct (this) &&
|
|
majorVersion == 1 &&
|
|
minorVersion > 0 &&
|
|
designAxesOffset.sanitize (c, this, designAxisCount) &&
|
|
offsetToAxisValueOffsets.sanitize (c, this, axisValueCount, &(this+offsetToAxisValueOffsets))));
|
|
}
|
|
|
|
protected:
|
|
HBUINT16 majorVersion; /* Major version number of the style attributes
|
|
* table — set to 1. */
|
|
HBUINT16 minorVersion; /* Minor version number of the style attributes
|
|
* table — set to 2. */
|
|
HBUINT16 designAxisSize; /* The size in bytes of each axis record. */
|
|
HBUINT16 designAxisCount;/* The number of design axis records. In a
|
|
* font with an 'fvar' table, this value must be
|
|
* greater than or equal to the axisCount value
|
|
* in the 'fvar' table. In all fonts, must
|
|
* be greater than zero if axisValueCount
|
|
* is greater than zero. */
|
|
LNNOffsetTo<UnsizedArrayOf<StatAxisRecord> >
|
|
designAxesOffset;
|
|
/* Offset in bytes from the beginning of
|
|
* the STAT table to the start of the design
|
|
* axes array. If designAxisCount is zero,
|
|
* set to zero; if designAxisCount is greater
|
|
* than zero, must be greater than zero. */
|
|
HBUINT16 axisValueCount; /* The number of axis value tables. */
|
|
LNNOffsetTo<UnsizedArrayOf<OffsetTo<AxisValue> > >
|
|
offsetToAxisValueOffsets;
|
|
/* Offset in bytes from the beginning of
|
|
* the STAT table to the start of the design
|
|
* axes value offsets array. If axisValueCount
|
|
* is zero, set to zero; if axisValueCount is
|
|
* greater than zero, must be greater than zero. */
|
|
NameID elidedFallbackNameID;
|
|
/* Name ID used as fallback when projection of
|
|
* names into a particular font model produces
|
|
* a subfamily name containing only elidable
|
|
* elements. */
|
|
public:
|
|
DEFINE_SIZE_STATIC (20);
|
|
};
|
|
|
|
|
|
} /* namespace OT */
|
|
|
|
|
|
#endif /* HB_OT_STAT_TABLE_HH */
|