125 lines
3.9 KiB
Rust
125 lines
3.9 KiB
Rust
// THIS FILE IS AUTOGENERATED.
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// Any changes to this file will be overwritten.
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// For more information about how codegen works, see font-codegen/README.md
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#[allow(unused_imports)]
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use crate::codegen_prelude::*;
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/// The [vmtx (Vertical Metrics)](https://docs.microsoft.com/en-us/typography/opentype/spec/vmtx) table
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#[derive(Debug, Clone, Copy)]
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#[doc(hidden)]
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pub struct VmtxMarker {
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v_metrics_byte_len: usize,
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top_side_bearings_byte_len: usize,
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}
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impl VmtxMarker {
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pub fn v_metrics_byte_range(&self) -> Range<usize> {
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let start = 0;
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start..start + self.v_metrics_byte_len
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}
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pub fn top_side_bearings_byte_range(&self) -> Range<usize> {
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let start = self.v_metrics_byte_range().end;
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start..start + self.top_side_bearings_byte_len
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}
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}
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impl MinByteRange for VmtxMarker {
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fn min_byte_range(&self) -> Range<usize> {
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0..self.top_side_bearings_byte_range().end
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}
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}
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impl TopLevelTable for Vmtx<'_> {
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/// `vmtx`
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const TAG: Tag = Tag::new(b"vmtx");
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}
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impl ReadArgs for Vmtx<'_> {
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type Args = (u16, u16);
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}
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impl<'a> FontReadWithArgs<'a> for Vmtx<'a> {
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fn read_with_args(data: FontData<'a>, args: &(u16, u16)) -> Result<Self, ReadError> {
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let (number_of_long_ver_metrics, num_glyphs) = *args;
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let mut cursor = data.cursor();
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let v_metrics_byte_len = (number_of_long_ver_metrics as usize)
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.checked_mul(LongMetric::RAW_BYTE_LEN)
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.ok_or(ReadError::OutOfBounds)?;
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cursor.advance_by(v_metrics_byte_len);
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let top_side_bearings_byte_len =
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(transforms::subtract(num_glyphs, number_of_long_ver_metrics))
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.checked_mul(i16::RAW_BYTE_LEN)
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.ok_or(ReadError::OutOfBounds)?;
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cursor.advance_by(top_side_bearings_byte_len);
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cursor.finish(VmtxMarker {
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v_metrics_byte_len,
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top_side_bearings_byte_len,
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})
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}
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}
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impl<'a> Vmtx<'a> {
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/// A constructor that requires additional arguments.
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///
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/// This type requires some external state in order to be
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/// parsed.
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pub fn read(
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data: FontData<'a>,
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number_of_long_ver_metrics: u16,
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num_glyphs: u16,
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) -> Result<Self, ReadError> {
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let args = (number_of_long_ver_metrics, num_glyphs);
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Self::read_with_args(data, &args)
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}
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}
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/// The [vmtx (Vertical Metrics)](https://docs.microsoft.com/en-us/typography/opentype/spec/vmtx) table
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pub type Vmtx<'a> = TableRef<'a, VmtxMarker>;
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#[allow(clippy::needless_lifetimes)]
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impl<'a> Vmtx<'a> {
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/// Paired advance height and top side bearing values for each
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/// glyph. Records are indexed by glyph ID.
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pub fn v_metrics(&self) -> &'a [LongMetric] {
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let range = self.shape.v_metrics_byte_range();
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self.data.read_array(range).unwrap()
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}
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/// Top side bearings for glyph IDs greater than or equal to numberOfLongMetrics.
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pub fn top_side_bearings(&self) -> &'a [BigEndian<i16>] {
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let range = self.shape.top_side_bearings_byte_range();
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self.data.read_array(range).unwrap()
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}
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}
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#[cfg(feature = "experimental_traverse")]
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impl<'a> SomeTable<'a> for Vmtx<'a> {
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fn type_name(&self) -> &str {
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"Vmtx"
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}
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fn get_field(&self, idx: usize) -> Option<Field<'a>> {
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match idx {
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0usize => Some(Field::new(
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"v_metrics",
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traversal::FieldType::array_of_records(
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stringify!(LongMetric),
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self.v_metrics(),
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self.offset_data(),
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),
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)),
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1usize => Some(Field::new("top_side_bearings", self.top_side_bearings())),
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_ => None,
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}
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}
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}
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#[cfg(feature = "experimental_traverse")]
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#[allow(clippy::needless_lifetimes)]
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impl<'a> std::fmt::Debug for Vmtx<'a> {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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(self as &dyn SomeTable<'a>).fmt(f)
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}
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}
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