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[STAT] Add table parsing #1384
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[STAT] Add table parsing #1384
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,280 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
|
|
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| #ifndef HB_OT_STAT_TABLE_HH | ||
| #define HB_OT_STAT_TABLE_HH | ||
|
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| #include "hb-open-type.hh" | ||
| #include "hb-ot-layout-common.hh" | ||
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| /* | ||
| * STAT -- Style Attributes | ||
| * https://docs.microsoft.com/en-us/typography/opentype/spec/stat | ||
| */ | ||
| #define HB_OT_TAG_STAT HB_TAG('S','T','A','T') | ||
|
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| namespace OT { | ||
|
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| 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 StatAxisRecord | ||
| { | ||
| inline bool sanitize (hb_sanitize_context_t *c) const | ||
| { | ||
| TRACE_SANITIZE (this); | ||
| return_trace (likely (c->check_struct (this))); | ||
| } | ||
|
|
||
| protected: | ||
| Tag axisTag; /* A tag identifying the axis of design variation. */ | ||
| NameID axisNameID; /* The name ID for entries in the 'name' table that | ||
| * provide a display string for this axis. */ | ||
| HBUINT16 axisOrdering; /* 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); | ||
| }; | ||
|
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| struct AxisValueFormat1 | ||
| { | ||
| inline bool sanitize (hb_sanitize_context_t *c) const | ||
| { | ||
| TRACE_SANITIZE (this); | ||
| return_trace (likely (c->check_struct (this))); | ||
| } | ||
|
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||
| 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 | ||
| { | ||
| inline bool sanitize (hb_sanitize_context_t *c) const | ||
| { | ||
| TRACE_SANITIZE (this); | ||
| return_trace (likely (c->check_struct (this))); | ||
| } | ||
|
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||
| 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 | ||
| { | ||
| inline 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 | ||
| { | ||
| inline 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); | ||
| }; | ||
|
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||
| struct AxisValueFormat4 | ||
| { | ||
| inline bool sanitize (hb_sanitize_context_t *c) const | ||
| { | ||
| TRACE_SANITIZE (this); | ||
| return_trace (likely (c->check_struct (this))); | ||
| } | ||
|
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| 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); | ||
| }; | ||
|
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| struct AxisValue | ||
| { | ||
| inline bool sanitize (hb_sanitize_context_t *c) const | ||
| { | ||
| TRACE_SANITIZE (this); | ||
| if (unlikely (c->check_struct (this))) | ||
| return_trace (false); | ||
|
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| 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); | ||
| } | ||
| } | ||
|
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| protected: | ||
| union | ||
| { | ||
| HBUINT16 format; | ||
| AxisValueFormat1 format1; | ||
| AxisValueFormat2 format2; | ||
| AxisValueFormat3 format3; | ||
| AxisValueFormat4 format4; | ||
| } u; | ||
| public: | ||
| DEFINE_SIZE_UNION (2, format); | ||
| }; | ||
|
|
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| struct STAT | ||
| { | ||
| static const hb_tag_t tableTag = HB_OT_TAG_STAT; | ||
|
|
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| inline 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)))); | ||
| } | ||
|
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| 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. */ | ||
| LOffsetTo<UnsizedArrayOf<StatAxisRecord>, false> | ||
| 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. */ | ||
| LOffsetTo<UnsizedArrayOf<OffsetTo<AxisValue> >, false> | ||
| 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); | ||
| }; | ||
|
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|
|
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| } /* namespace OT */ | ||
|
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|
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| #endif /* HB_OT_STAT_TABLE_HH */ |
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