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 ReadArgs for Cvar<'_> {
24    type Args = ();
25}
26
27impl<'a> FontRead<'a> for Cvar<'a> {
28    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
29        #[allow(clippy::absurd_extreme_comparisons)]
30        if data.len() < Self::MIN_SIZE {
31            return Err(ReadError::OutOfBounds);
32        }
33        Ok(Self { data })
34    }
35}
36
37/// The [cvar](https://learn.microsoft.com/en-us/typography/opentype/spec/cvar) table.
38#[derive(Clone)]
39pub struct Cvar<'a> {
40    data: FontData<'a>,
41}
42
43#[allow(clippy::needless_lifetimes)]
44impl<'a> Cvar<'a> {
45    pub const MIN_SIZE: usize =
46        (MajorMinor::RAW_BYTE_LEN + TupleVariationCount::RAW_BYTE_LEN + Offset16::RAW_BYTE_LEN);
47    basic_table_impls!(impl_the_methods);
48
49    /// Major/minor version number of the CVT variations table — set to (1,0).
50    pub fn version(&self) -> MajorMinor {
51        let range = self.version_byte_range();
52        self.data.read_at(range.start).ok().unwrap()
53    }
54
55    /// A packed field. The high 4 bits are flags, and the low 12 bits
56    /// are the number of tuple variation tables for this glyph. The
57    /// number of tuple variation tables can be any number between 1
58    /// and 4095.
59    pub fn tuple_variation_count(&self) -> TupleVariationCount {
60        let range = self.tuple_variation_count_byte_range();
61        self.data.read_at(range.start).ok().unwrap()
62    }
63
64    /// Offset from the start of the 'cvar' table to the serialized data.
65    pub fn data_offset(&self) -> Offset16 {
66        let range = self.data_offset_byte_range();
67        self.data.read_at(range.start).ok().unwrap()
68    }
69
70    /// Attempt to resolve [`data_offset`][Self::data_offset].
71    pub fn data(&self) -> Result<FontData<'a>, ReadError> {
72        let data = self.data;
73        self.data_offset().resolve(data)
74    }
75
76    /// Array of tuple variation headers.
77    pub fn tuple_variation_headers(&self) -> VarLenArray<'a, TupleVariationHeader<'a>> {
78        let range = self.tuple_variation_headers_byte_range();
79        self.data
80            .split_off(range.start)
81            .and_then(|d| VarLenArray::read(d).ok())
82            .unwrap_or_default()
83    }
84
85    pub fn version_byte_range(&self) -> Range<usize> {
86        let start = 0;
87        let end = start + MajorMinor::RAW_BYTE_LEN;
88        start..end
89    }
90
91    pub fn tuple_variation_count_byte_range(&self) -> Range<usize> {
92        let start = self.version_byte_range().end;
93        let end = start + TupleVariationCount::RAW_BYTE_LEN;
94        start..end
95    }
96
97    pub fn data_offset_byte_range(&self) -> Range<usize> {
98        let start = self.tuple_variation_count_byte_range().end;
99        let end = start + Offset16::RAW_BYTE_LEN;
100        start..end
101    }
102
103    pub fn tuple_variation_headers_byte_range(&self) -> Range<usize> {
104        let start = self.data_offset_byte_range().end;
105        let end = start + self.data.len().saturating_sub(start);
106        start..end
107    }
108}
109
110const _: () = assert!(FontData::default_data_long_enough(Cvar::MIN_SIZE));
111
112impl Default for Cvar<'_> {
113    fn default() -> Self {
114        Self {
115            data: FontData::default_table_data(),
116        }
117    }
118}
119
120#[cfg(feature = "experimental_traverse")]
121impl<'a> SomeTable<'a> for Cvar<'a> {
122    fn type_name(&self) -> &str {
123        "Cvar"
124    }
125    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
126        match idx {
127            0usize => Some(Field::new("version", self.version())),
128            1usize => Some(Field::new(
129                "tuple_variation_count",
130                traversal::FieldType::Unknown,
131            )),
132            2usize => Some(Field::new("data_offset", traversal::FieldType::Unknown)),
133            3usize => Some(Field::new(
134                "tuple_variation_headers",
135                traversal::FieldType::Unknown,
136            )),
137            _ => None,
138        }
139    }
140}
141
142#[cfg(feature = "experimental_traverse")]
143#[allow(clippy::needless_lifetimes)]
144impl<'a> std::fmt::Debug for Cvar<'a> {
145    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
146        (self as &dyn SomeTable<'a>).fmt(f)
147    }
148}
read_fonts/generated/generated_cvar.rs

read_fonts/generated/
generated_cvar.rs
