read_fonts/generated/
generated_cvar.rs

1// THIS FILE IS AUTOGENERATED.
2// Any changes to this file will be overwritten.
3// For more information about how codegen works, see font-codegen/README.md
4
5#[allow(unused_imports)]
6use crate::codegen_prelude::*;
7
8impl<'a> MinByteRange<'a> for Cvar<'a> {
9    fn min_byte_range(&self) -> Range<usize> {
10        0..self.tuple_variation_headers_byte_range().end
11    }
12    fn min_table_bytes(&self) -> &'a [u8] {
13        let range = self.min_byte_range();
14        self.data.as_bytes().get(range).unwrap_or_default()
15    }
16}
17
18impl TopLevelTable for Cvar<'_> {
19    /// `cvar`
20    const TAG: Tag = Tag::new(b"cvar");
21}
22
23impl<'a> FontRead<'a> for Cvar<'a> {
24    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
25        #[allow(clippy::absurd_extreme_comparisons)]
26        if data.len() < Self::MIN_SIZE {
27            return Err(ReadError::OutOfBounds);
28        }
29        Ok(Self { data })
30    }
31}
32
33/// The [cvar](https://learn.microsoft.com/en-us/typography/opentype/spec/cvar) table.
34#[derive(Clone)]
35pub struct Cvar<'a> {
36    data: FontData<'a>,
37}
38
39#[allow(clippy::needless_lifetimes)]
40impl<'a> Cvar<'a> {
41    pub const MIN_SIZE: usize =
42        (MajorMinor::RAW_BYTE_LEN + TupleVariationCount::RAW_BYTE_LEN + Offset16::RAW_BYTE_LEN);
43    basic_table_impls!(impl_the_methods);
44
45    /// Major/minor version number of the CVT variations table — set to (1,0).
46    pub fn version(&self) -> MajorMinor {
47        let range = self.version_byte_range();
48        self.data.read_at(range.start).ok().unwrap()
49    }
50
51    /// A packed field. The high 4 bits are flags, and the low 12 bits
52    /// are the number of tuple variation tables for this glyph. The
53    /// number of tuple variation tables can be any number between 1
54    /// and 4095.
55    pub fn tuple_variation_count(&self) -> TupleVariationCount {
56        let range = self.tuple_variation_count_byte_range();
57        self.data.read_at(range.start).ok().unwrap()
58    }
59
60    /// Offset from the start of the 'cvar' table to the serialized data.
61    pub fn data_offset(&self) -> Offset16 {
62        let range = self.data_offset_byte_range();
63        self.data.read_at(range.start).ok().unwrap()
64    }
65
66    /// Attempt to resolve [`data_offset`][Self::data_offset].
67    pub fn data(&self) -> Result<FontData<'a>, ReadError> {
68        let data = self.data;
69        self.data_offset().resolve(data)
70    }
71
72    /// Array of tuple variation headers.
73    pub fn tuple_variation_headers(&self) -> VarLenArray<'a, TupleVariationHeader<'a>> {
74        let range = self.tuple_variation_headers_byte_range();
75        self.data
76            .split_off(range.start)
77            .and_then(|d| VarLenArray::read(d).ok())
78            .unwrap_or_default()
79    }
80
81    pub fn version_byte_range(&self) -> Range<usize> {
82        let start = 0;
83        let end = start + MajorMinor::RAW_BYTE_LEN;
84        start..end
85    }
86
87    pub fn tuple_variation_count_byte_range(&self) -> Range<usize> {
88        let start = self.version_byte_range().end;
89        let end = start + TupleVariationCount::RAW_BYTE_LEN;
90        start..end
91    }
92
93    pub fn data_offset_byte_range(&self) -> Range<usize> {
94        let start = self.tuple_variation_count_byte_range().end;
95        let end = start + Offset16::RAW_BYTE_LEN;
96        start..end
97    }
98
99    pub fn tuple_variation_headers_byte_range(&self) -> Range<usize> {
100        let start = self.data_offset_byte_range().end;
101        let end = start + self.data.len().saturating_sub(start);
102        start..end
103    }
104}
105
106const _: () = assert!(FontData::default_data_long_enough(Cvar::MIN_SIZE));
107
108impl Default for Cvar<'_> {
109    fn default() -> Self {
110        Self {
111            data: FontData::default_table_data(),
112        }
113    }
114}
115
116#[cfg(feature = "experimental_traverse")]
117impl<'a> SomeTable<'a> for Cvar<'a> {
118    fn type_name(&self) -> &str {
119        "Cvar"
120    }
121    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
122        match idx {
123            0usize => Some(Field::new("version", self.version())),
124            1usize => Some(Field::new(
125                "tuple_variation_count",
126                traversal::FieldType::Unknown,
127            )),
128            2usize => Some(Field::new("data_offset", traversal::FieldType::Unknown)),
129            3usize => Some(Field::new(
130                "tuple_variation_headers",
131                traversal::FieldType::Unknown,
132            )),
133            _ => None,
134        }
135    }
136}
137
138#[cfg(feature = "experimental_traverse")]
139#[allow(clippy::needless_lifetimes)]
140impl<'a> std::fmt::Debug for Cvar<'a> {
141    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
142        (self as &dyn SomeTable<'a>).fmt(f)
143    }
144}
read_fonts/generated/generated_cvar.rs

read_fonts/generated/
generated_cvar.rs
