read_fonts/generated/
generated_avar.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
// THIS FILE IS AUTOGENERATED.
// Any changes to this file will be overwritten.
// For more information about how codegen works, see font-codegen/README.md

#[allow(unused_imports)]
use crate::codegen_prelude::*;

/// The [avar (Axis Variations)](https://docs.microsoft.com/en-us/typography/opentype/spec/avar) table
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct AvarMarker {
    axis_segment_maps_byte_len: usize,
    axis_index_map_offset_byte_start: Option<usize>,
    var_store_offset_byte_start: Option<usize>,
}

impl AvarMarker {
    fn version_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + MajorMinor::RAW_BYTE_LEN
    }
    fn _reserved_byte_range(&self) -> Range<usize> {
        let start = self.version_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn axis_count_byte_range(&self) -> Range<usize> {
        let start = self._reserved_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn axis_segment_maps_byte_range(&self) -> Range<usize> {
        let start = self.axis_count_byte_range().end;
        start..start + self.axis_segment_maps_byte_len
    }
    fn axis_index_map_offset_byte_range(&self) -> Option<Range<usize>> {
        let start = self.axis_index_map_offset_byte_start?;
        Some(start..start + Offset32::RAW_BYTE_LEN)
    }
    fn var_store_offset_byte_range(&self) -> Option<Range<usize>> {
        let start = self.var_store_offset_byte_start?;
        Some(start..start + Offset32::RAW_BYTE_LEN)
    }
}

impl TopLevelTable for Avar<'_> {
    /// `avar`
    const TAG: Tag = Tag::new(b"avar");
}

impl<'a> FontRead<'a> for Avar<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let version: MajorMinor = cursor.read()?;
        cursor.advance::<u16>();
        let axis_count: u16 = cursor.read()?;
        let axis_segment_maps_byte_len = {
            let data = cursor.remaining().ok_or(ReadError::OutOfBounds)?;
            <SegmentMaps as VarSize>::total_len_for_count(data, axis_count as usize)?
        };
        cursor.advance_by(axis_segment_maps_byte_len);
        let axis_index_map_offset_byte_start = version
            .compatible((2u16, 0u16))
            .then(|| cursor.position())
            .transpose()?;
        version
            .compatible((2u16, 0u16))
            .then(|| cursor.advance::<Offset32>());
        let var_store_offset_byte_start = version
            .compatible((2u16, 0u16))
            .then(|| cursor.position())
            .transpose()?;
        version
            .compatible((2u16, 0u16))
            .then(|| cursor.advance::<Offset32>());
        cursor.finish(AvarMarker {
            axis_segment_maps_byte_len,
            axis_index_map_offset_byte_start,
            var_store_offset_byte_start,
        })
    }
}

/// The [avar (Axis Variations)](https://docs.microsoft.com/en-us/typography/opentype/spec/avar) table
pub type Avar<'a> = TableRef<'a, AvarMarker>;

impl<'a> Avar<'a> {
    /// Major version number of the axis variations table — set to 1 or 2.
    /// Minor version number of the axis variations table — set to 0.
    pub fn version(&self) -> MajorMinor {
        let range = self.shape.version_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// The number of variation axes for this font. This must be the same number as axisCount in the 'fvar' table.
    pub fn axis_count(&self) -> u16 {
        let range = self.shape.axis_count_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// The segment maps array — one segment map for each axis, in the order of axes specified in the 'fvar' table.
    pub fn axis_segment_maps(&self) -> VarLenArray<'a, SegmentMaps<'a>> {
        let range = self.shape.axis_segment_maps_byte_range();
        VarLenArray::read(self.data.split_off(range.start).unwrap()).unwrap()
    }

    /// Offset to DeltaSetIndexMap table (may be NULL).
    pub fn axis_index_map_offset(&self) -> Option<Nullable<Offset32>> {
        let range = self.shape.axis_index_map_offset_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    /// Attempt to resolve [`axis_index_map_offset`][Self::axis_index_map_offset].
    pub fn axis_index_map(&self) -> Option<Result<DeltaSetIndexMap<'a>, ReadError>> {
        let data = self.data;
        self.axis_index_map_offset().map(|x| x.resolve(data))?
    }

    /// Offset to ItemVariationStore (may be NULL).
    pub fn var_store_offset(&self) -> Option<Nullable<Offset32>> {
        let range = self.shape.var_store_offset_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    /// Attempt to resolve [`var_store_offset`][Self::var_store_offset].
    pub fn var_store(&self) -> Option<Result<ItemVariationStore<'a>, ReadError>> {
        let data = self.data;
        self.var_store_offset().map(|x| x.resolve(data))?
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for Avar<'a> {
    fn type_name(&self) -> &str {
        "Avar"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        let version = self.version();
        match idx {
            0usize => Some(Field::new("version", self.version())),
            1usize => Some(Field::new("axis_count", self.axis_count())),
            2usize => Some(Field::new(
                "axis_segment_maps",
                traversal::FieldType::var_array(
                    "SegmentMaps",
                    self.axis_segment_maps(),
                    self.offset_data(),
                ),
            )),
            3usize if version.compatible((2u16, 0u16)) => Some(Field::new(
                "axis_index_map_offset",
                FieldType::offset(self.axis_index_map_offset().unwrap(), self.axis_index_map()),
            )),
            4usize if version.compatible((2u16, 0u16)) => Some(Field::new(
                "var_store_offset",
                FieldType::offset(self.var_store_offset().unwrap(), self.var_store()),
            )),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for Avar<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

/// [SegmentMaps](https://learn.microsoft.com/en-us/typography/opentype/spec/avar#table-formats) record
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct SegmentMaps<'a> {
    /// The number of correspondence pairs for this axis.
    pub position_map_count: BigEndian<u16>,
    /// The array of axis value map records for this axis.
    pub axis_value_maps: &'a [AxisValueMap],
}

impl<'a> SegmentMaps<'a> {
    /// The number of correspondence pairs for this axis.
    pub fn position_map_count(&self) -> u16 {
        self.position_map_count.get()
    }

    /// The array of axis value map records for this axis.
    pub fn axis_value_maps(&self) -> &'a [AxisValueMap] {
        self.axis_value_maps
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for SegmentMaps<'a> {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "SegmentMaps",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("position_map_count", self.position_map_count())),
                1usize => Some(Field::new(
                    "axis_value_maps",
                    traversal::FieldType::array_of_records(
                        stringify!(AxisValueMap),
                        self.axis_value_maps(),
                        _data,
                    ),
                )),
                _ => None,
            }),
            data,
        }
    }
}

/// [AxisValueMap](https://learn.microsoft.com/en-us/typography/opentype/spec/avar#table-formats) record
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct AxisValueMap {
    /// A normalized coordinate value obtained using default normalization.
    pub from_coordinate: BigEndian<F2Dot14>,
    /// The modified, normalized coordinate value.
    pub to_coordinate: BigEndian<F2Dot14>,
}

impl AxisValueMap {
    /// A normalized coordinate value obtained using default normalization.
    pub fn from_coordinate(&self) -> F2Dot14 {
        self.from_coordinate.get()
    }

    /// The modified, normalized coordinate value.
    pub fn to_coordinate(&self) -> F2Dot14 {
        self.to_coordinate.get()
    }
}

impl FixedSize for AxisValueMap {
    const RAW_BYTE_LEN: usize = F2Dot14::RAW_BYTE_LEN + F2Dot14::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for AxisValueMap {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "AxisValueMap",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("from_coordinate", self.from_coordinate())),
                1usize => Some(Field::new("to_coordinate", self.to_coordinate())),
                _ => None,
            }),
            data,
        }
    }
}