// 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 [MVAR (Metrics Variations)](https://docs.microsoft.com/en-us/typography/opentype/spec/mvar) table
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct MvarMarker {
value_records_byte_len: usize,
}
impl MvarMarker {
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 value_record_size_byte_range(&self) -> Range<usize> {
let start = self._reserved_byte_range().end;
start..start + u16::RAW_BYTE_LEN
}
fn value_record_count_byte_range(&self) -> Range<usize> {
let start = self.value_record_size_byte_range().end;
start..start + u16::RAW_BYTE_LEN
}
fn item_variation_store_offset_byte_range(&self) -> Range<usize> {
let start = self.value_record_count_byte_range().end;
start..start + Offset16::RAW_BYTE_LEN
}
fn value_records_byte_range(&self) -> Range<usize> {
let start = self.item_variation_store_offset_byte_range().end;
start..start + self.value_records_byte_len
}
}
impl TopLevelTable for Mvar<'_> {
/// `MVAR`
const TAG: Tag = Tag::new(b"MVAR");
}
impl<'a> FontRead<'a> for Mvar<'a> {
fn read(data: FontData<'a>) -> Result<Self, ReadError> {
let mut cursor = data.cursor();
cursor.advance::<MajorMinor>();
cursor.advance::<u16>();
cursor.advance::<u16>();
let value_record_count: u16 = cursor.read()?;
cursor.advance::<Offset16>();
let value_records_byte_len = (value_record_count as usize)
.checked_mul(ValueRecord::RAW_BYTE_LEN)
.ok_or(ReadError::OutOfBounds)?;
cursor.advance_by(value_records_byte_len);
cursor.finish(MvarMarker {
value_records_byte_len,
})
}
}
/// The [MVAR (Metrics Variations)](https://docs.microsoft.com/en-us/typography/opentype/spec/mvar) table
pub type Mvar<'a> = TableRef<'a, MvarMarker>;
impl<'a> Mvar<'a> {
/// Major version number of the horizontal metrics variations table — set to 1.
/// Minor version number of the horizontal metrics 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 size in bytes of each value record — must be greater than zero.
pub fn value_record_size(&self) -> u16 {
let range = self.shape.value_record_size_byte_range();
self.data.read_at(range.start).unwrap()
}
/// The number of value records — may be zero.
pub fn value_record_count(&self) -> u16 {
let range = self.shape.value_record_count_byte_range();
self.data.read_at(range.start).unwrap()
}
/// Offset in bytes from the start of this table to the item variation store table. If valueRecordCount is zero, set to zero; if valueRecordCount is greater than zero, must be greater than zero.
pub fn item_variation_store_offset(&self) -> Nullable<Offset16> {
let range = self.shape.item_variation_store_offset_byte_range();
self.data.read_at(range.start).unwrap()
}
/// Attempt to resolve [`item_variation_store_offset`][Self::item_variation_store_offset].
pub fn item_variation_store(&self) -> Option<Result<ItemVariationStore<'a>, ReadError>> {
let data = self.data;
self.item_variation_store_offset().resolve(data)
}
/// Array of value records that identify target items and the associated delta-set index for each. The valueTag records must be in binary order of their valueTag field.
pub fn value_records(&self) -> &'a [ValueRecord] {
let range = self.shape.value_records_byte_range();
self.data.read_array(range).unwrap()
}
}
#[cfg(feature = "traversal")]
impl<'a> SomeTable<'a> for Mvar<'a> {
fn type_name(&self) -> &str {
"Mvar"
}
fn get_field(&self, idx: usize) -> Option<Field<'a>> {
match idx {
0usize => Some(Field::new("version", self.version())),
1usize => Some(Field::new("value_record_size", self.value_record_size())),
2usize => Some(Field::new("value_record_count", self.value_record_count())),
3usize => Some(Field::new(
"item_variation_store_offset",
FieldType::offset(
self.item_variation_store_offset(),
self.item_variation_store(),
),
)),
4usize => Some(Field::new(
"value_records",
traversal::FieldType::array_of_records(
stringify!(ValueRecord),
self.value_records(),
self.offset_data(),
),
)),
_ => None,
}
}
}
#[cfg(feature = "traversal")]
impl<'a> std::fmt::Debug for Mvar<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
(self as &dyn SomeTable<'a>).fmt(f)
}
}
/// [ValueRecord](https://learn.microsoft.com/en-us/typography/opentype/spec/mvar#table-formats) metrics variation record
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct ValueRecord {
/// Four-byte tag identifying a font-wide measure.
pub value_tag: BigEndian<Tag>,
/// A delta-set outer index — used to select an item variation data subtable within the item variation store.
pub delta_set_outer_index: BigEndian<u16>,
/// A delta-set inner index — used to select a delta-set row within an item variation data subtable.
pub delta_set_inner_index: BigEndian<u16>,
}
impl ValueRecord {
/// Four-byte tag identifying a font-wide measure.
pub fn value_tag(&self) -> Tag {
self.value_tag.get()
}
/// A delta-set outer index — used to select an item variation data subtable within the item variation store.
pub fn delta_set_outer_index(&self) -> u16 {
self.delta_set_outer_index.get()
}
/// A delta-set inner index — used to select a delta-set row within an item variation data subtable.
pub fn delta_set_inner_index(&self) -> u16 {
self.delta_set_inner_index.get()
}
}
impl FixedSize for ValueRecord {
const RAW_BYTE_LEN: usize = Tag::RAW_BYTE_LEN + u16::RAW_BYTE_LEN + u16::RAW_BYTE_LEN;
}
#[cfg(feature = "traversal")]
impl<'a> SomeRecord<'a> for ValueRecord {
fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
RecordResolver {
name: "ValueRecord",
get_field: Box::new(move |idx, _data| match idx {
0usize => Some(Field::new("value_tag", self.value_tag())),
1usize => Some(Field::new(
"delta_set_outer_index",
self.delta_set_outer_index(),
)),
2usize => Some(Field::new(
"delta_set_inner_index",
self.delta_set_inner_index(),
)),
_ => None,
}),
data,
}
}
}
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