read_fonts/generated/

generated_bitmap.rs

// 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::*;

/// [BitmapSize](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#bitmapsize-record) record.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct BitmapSize {
    /// Offset to index subtable from beginning of EBLC/CBLC.
    pub index_subtable_array_offset: BigEndian<u32>,
    /// Number of bytes in corresponding index subtables and array.
    pub index_tables_size: BigEndian<u32>,
    /// There is an index subtable for each range or format change.
    pub number_of_index_subtables: BigEndian<u32>,
    /// Not used; set to 0.
    pub color_ref: BigEndian<u32>,
    /// Line metrics for text rendered horizontally.
    pub hori: SbitLineMetrics,
    /// Line metrics for text rendered vertically.
    pub vert: SbitLineMetrics,
    /// Lowest glyph index for this size.
    pub start_glyph_index: BigEndian<GlyphId16>,
    /// Highest glyph index for this size.
    pub end_glyph_index: BigEndian<GlyphId16>,
    /// Horizontal pixels per em.
    pub ppem_x: u8,
    /// Vertical pixels per em.
    pub ppem_y: u8,
    /// The Microsoft rasterizer v.1.7 or greater supports the following
    /// bitDepth values, as described below: 1, 2, 4, and 8 (and 32 for CBLC).
    pub bit_depth: u8,
    /// Vertical or horizontal.
    pub flags: BigEndian<BitmapFlags>,
}

impl BitmapSize {
    /// Offset to index subtable from beginning of EBLC/CBLC.
    pub fn index_subtable_array_offset(&self) -> u32 {
        self.index_subtable_array_offset.get()
    }

    /// Number of bytes in corresponding index subtables and array.
    pub fn index_tables_size(&self) -> u32 {
        self.index_tables_size.get()
    }

    /// There is an index subtable for each range or format change.
    pub fn number_of_index_subtables(&self) -> u32 {
        self.number_of_index_subtables.get()
    }

    /// Not used; set to 0.
    pub fn color_ref(&self) -> u32 {
        self.color_ref.get()
    }

    /// Line metrics for text rendered horizontally.
    pub fn hori(&self) -> &SbitLineMetrics {
        &self.hori
    }

    /// Line metrics for text rendered vertically.
    pub fn vert(&self) -> &SbitLineMetrics {
        &self.vert
    }

    /// Lowest glyph index for this size.
    pub fn start_glyph_index(&self) -> GlyphId16 {
        self.start_glyph_index.get()
    }

    /// Highest glyph index for this size.
    pub fn end_glyph_index(&self) -> GlyphId16 {
        self.end_glyph_index.get()
    }

    /// Horizontal pixels per em.
    pub fn ppem_x(&self) -> u8 {
        self.ppem_x
    }

    /// Vertical pixels per em.
    pub fn ppem_y(&self) -> u8 {
        self.ppem_y
    }

    /// The Microsoft rasterizer v.1.7 or greater supports the following
    /// bitDepth values, as described below: 1, 2, 4, and 8 (and 32 for CBLC).
    pub fn bit_depth(&self) -> u8 {
        self.bit_depth
    }

    /// Vertical or horizontal.
    pub fn flags(&self) -> BitmapFlags {
        self.flags.get()
    }
}

impl FixedSize for BitmapSize {
    const RAW_BYTE_LEN: usize = u32::RAW_BYTE_LEN
        + u32::RAW_BYTE_LEN
        + u32::RAW_BYTE_LEN
        + u32::RAW_BYTE_LEN
        + SbitLineMetrics::RAW_BYTE_LEN
        + SbitLineMetrics::RAW_BYTE_LEN
        + GlyphId16::RAW_BYTE_LEN
        + GlyphId16::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + BitmapFlags::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for BitmapSize {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "BitmapSize",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new(
                    "index_subtable_array_offset",
                    self.index_subtable_array_offset(),
                )),
                1usize => Some(Field::new("index_tables_size", self.index_tables_size())),
                2usize => Some(Field::new(
                    "number_of_index_subtables",
                    self.number_of_index_subtables(),
                )),
                3usize => Some(Field::new("color_ref", self.color_ref())),
                4usize => Some(Field::new("hori", self.hori().traversal_type(_data))),
                5usize => Some(Field::new("vert", self.vert().traversal_type(_data))),
                6usize => Some(Field::new("start_glyph_index", self.start_glyph_index())),
                7usize => Some(Field::new("end_glyph_index", self.end_glyph_index())),
                8usize => Some(Field::new("ppem_x", self.ppem_x())),
                9usize => Some(Field::new("ppem_y", self.ppem_y())),
                10usize => Some(Field::new("bit_depth", self.bit_depth())),
                11usize => Some(Field::new("flags", self.flags())),
                _ => None,
            }),
            data,
        }
    }
}

/// [SbitLineMetrics](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#sbitlinemetrics-record) record.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct SbitLineMetrics {
    pub ascender: BigEndian<i8>,
    pub descender: BigEndian<i8>,
    pub width_max: u8,
    pub caret_slope_numerator: BigEndian<i8>,
    pub caret_slope_denominator: u8,
    pub caret_offset: BigEndian<i8>,
    pub min_origin_sb: BigEndian<i8>,
    pub min_advance_sb: BigEndian<i8>,
    pub max_before_bl: BigEndian<i8>,
    pub min_after_bl: BigEndian<i8>,
    pub pad1: BigEndian<i8>,
    pub pad2: BigEndian<i8>,
}

impl SbitLineMetrics {
    pub fn ascender(&self) -> i8 {
        self.ascender.get()
    }

    pub fn descender(&self) -> i8 {
        self.descender.get()
    }

    pub fn width_max(&self) -> u8 {
        self.width_max
    }

    pub fn caret_slope_numerator(&self) -> i8 {
        self.caret_slope_numerator.get()
    }

    pub fn caret_slope_denominator(&self) -> u8 {
        self.caret_slope_denominator
    }

    pub fn caret_offset(&self) -> i8 {
        self.caret_offset.get()
    }

    pub fn min_origin_sb(&self) -> i8 {
        self.min_origin_sb.get()
    }

    pub fn min_advance_sb(&self) -> i8 {
        self.min_advance_sb.get()
    }

    pub fn max_before_bl(&self) -> i8 {
        self.max_before_bl.get()
    }

    pub fn min_after_bl(&self) -> i8 {
        self.min_after_bl.get()
    }

    pub fn pad1(&self) -> i8 {
        self.pad1.get()
    }

    pub fn pad2(&self) -> i8 {
        self.pad2.get()
    }
}

impl FixedSize for SbitLineMetrics {
    const RAW_BYTE_LEN: usize = i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for SbitLineMetrics {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "SbitLineMetrics",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("ascender", self.ascender())),
                1usize => Some(Field::new("descender", self.descender())),
                2usize => Some(Field::new("width_max", self.width_max())),
                3usize => Some(Field::new(
                    "caret_slope_numerator",
                    self.caret_slope_numerator(),
                )),
                4usize => Some(Field::new(
                    "caret_slope_denominator",
                    self.caret_slope_denominator(),
                )),
                5usize => Some(Field::new("caret_offset", self.caret_offset())),
                6usize => Some(Field::new("min_origin_sb", self.min_origin_sb())),
                7usize => Some(Field::new("min_advance_sb", self.min_advance_sb())),
                8usize => Some(Field::new("max_before_bl", self.max_before_bl())),
                9usize => Some(Field::new("min_after_bl", self.min_after_bl())),
                10usize => Some(Field::new("pad1", self.pad1())),
                11usize => Some(Field::new("pad2", self.pad2())),
                _ => None,
            }),
            data,
        }
    }
}

/// [Bitmap flags](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#bitmap-flags).
#[derive(Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash, bytemuck :: AnyBitPattern)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[repr(transparent)]
pub struct BitmapFlags {
    bits: u8,
}

impl BitmapFlags {
    /// Horizontal
    pub const HORIZONTAL_METRICS: Self = Self { bits: 0x01 };

    /// Vertical
    pub const VERTICAL_METRICS: Self = Self { bits: 0x02 };
}

impl BitmapFlags {
    ///  Returns an empty set of flags.
    #[inline]
    pub const fn empty() -> Self {
        Self { bits: 0 }
    }

    /// Returns the set containing all flags.
    #[inline]
    pub const fn all() -> Self {
        Self {
            bits: Self::HORIZONTAL_METRICS.bits | Self::VERTICAL_METRICS.bits,
        }
    }

    /// Returns the raw value of the flags currently stored.
    #[inline]
    pub const fn bits(&self) -> u8 {
        self.bits
    }

    /// Convert from underlying bit representation, unless that
    /// representation contains bits that do not correspond to a flag.
    #[inline]
    pub const fn from_bits(bits: u8) -> Option<Self> {
        if (bits & !Self::all().bits()) == 0 {
            Some(Self { bits })
        } else {
            None
        }
    }

    /// Convert from underlying bit representation, dropping any bits
    /// that do not correspond to flags.
    #[inline]
    pub const fn from_bits_truncate(bits: u8) -> Self {
        Self {
            bits: bits & Self::all().bits,
        }
    }

    /// Returns `true` if no flags are currently stored.
    #[inline]
    pub const fn is_empty(&self) -> bool {
        self.bits() == Self::empty().bits()
    }

    /// Returns `true` if there are flags common to both `self` and `other`.
    #[inline]
    pub const fn intersects(&self, other: Self) -> bool {
        !(Self {
            bits: self.bits & other.bits,
        })
        .is_empty()
    }

    /// Returns `true` if all of the flags in `other` are contained within `self`.
    #[inline]
    pub const fn contains(&self, other: Self) -> bool {
        (self.bits & other.bits) == other.bits
    }

    /// Inserts the specified flags in-place.
    #[inline]
    pub fn insert(&mut self, other: Self) {
        self.bits |= other.bits;
    }

    /// Removes the specified flags in-place.
    #[inline]
    pub fn remove(&mut self, other: Self) {
        self.bits &= !other.bits;
    }

    /// Toggles the specified flags in-place.
    #[inline]
    pub fn toggle(&mut self, other: Self) {
        self.bits ^= other.bits;
    }

    /// Returns the intersection between the flags in `self` and
    /// `other`.
    ///
    /// Specifically, the returned set contains only the flags which are
    /// present in *both* `self` *and* `other`.
    ///
    /// This is equivalent to using the `&` operator (e.g.
    /// [`ops::BitAnd`]), as in `flags & other`.
    ///
    /// [`ops::BitAnd`]: https://doc.rust-lang.org/std/ops/trait.BitAnd.html
    #[inline]
    #[must_use]
    pub const fn intersection(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }

    /// Returns the union of between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags which are
    /// present in *either* `self` *or* `other`, including any which are
    /// present in both.
    ///
    /// This is equivalent to using the `|` operator (e.g.
    /// [`ops::BitOr`]), as in `flags | other`.
    ///
    /// [`ops::BitOr`]: https://doc.rust-lang.org/std/ops/trait.BitOr.html
    #[inline]
    #[must_use]
    pub const fn union(self, other: Self) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }

    /// Returns the difference between the flags in `self` and `other`.
    ///
    /// Specifically, the returned set contains all flags present in
    /// `self`, except for the ones present in `other`.
    ///
    /// It is also conceptually equivalent to the "bit-clear" operation:
    /// `flags & !other` (and this syntax is also supported).
    ///
    /// This is equivalent to using the `-` operator (e.g.
    /// [`ops::Sub`]), as in `flags - other`.
    ///
    /// [`ops::Sub`]: https://doc.rust-lang.org/std/ops/trait.Sub.html
    #[inline]
    #[must_use]
    pub const fn difference(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::BitOr for BitmapFlags {
    type Output = Self;

    /// Returns the union of the two sets of flags.
    #[inline]
    fn bitor(self, other: BitmapFlags) -> Self {
        Self {
            bits: self.bits | other.bits,
        }
    }
}

impl std::ops::BitOrAssign for BitmapFlags {
    /// Adds the set of flags.
    #[inline]
    fn bitor_assign(&mut self, other: Self) {
        self.bits |= other.bits;
    }
}

impl std::ops::BitXor for BitmapFlags {
    type Output = Self;

    /// Returns the left flags, but with all the right flags toggled.
    #[inline]
    fn bitxor(self, other: Self) -> Self {
        Self {
            bits: self.bits ^ other.bits,
        }
    }
}

impl std::ops::BitXorAssign for BitmapFlags {
    /// Toggles the set of flags.
    #[inline]
    fn bitxor_assign(&mut self, other: Self) {
        self.bits ^= other.bits;
    }
}

impl std::ops::BitAnd for BitmapFlags {
    type Output = Self;

    /// Returns the intersection between the two sets of flags.
    #[inline]
    fn bitand(self, other: Self) -> Self {
        Self {
            bits: self.bits & other.bits,
        }
    }
}

impl std::ops::BitAndAssign for BitmapFlags {
    /// Disables all flags disabled in the set.
    #[inline]
    fn bitand_assign(&mut self, other: Self) {
        self.bits &= other.bits;
    }
}

impl std::ops::Sub for BitmapFlags {
    type Output = Self;

    /// Returns the set difference of the two sets of flags.
    #[inline]
    fn sub(self, other: Self) -> Self {
        Self {
            bits: self.bits & !other.bits,
        }
    }
}

impl std::ops::SubAssign for BitmapFlags {
    /// Disables all flags enabled in the set.
    #[inline]
    fn sub_assign(&mut self, other: Self) {
        self.bits &= !other.bits;
    }
}

impl std::ops::Not for BitmapFlags {
    type Output = Self;

    /// Returns the complement of this set of flags.
    #[inline]
    fn not(self) -> Self {
        Self { bits: !self.bits } & Self::all()
    }
}

impl std::fmt::Debug for BitmapFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        let members: &[(&str, Self)] = &[
            ("HORIZONTAL_METRICS", Self::HORIZONTAL_METRICS),
            ("VERTICAL_METRICS", Self::VERTICAL_METRICS),
        ];
        let mut first = true;
        for (name, value) in members {
            if self.contains(*value) {
                if !first {
                    f.write_str(" | ")?;
                }
                first = false;
                f.write_str(name)?;
            }
        }
        if first {
            f.write_str("(empty)")?;
        }
        Ok(())
    }
}

impl std::fmt::Binary for BitmapFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Binary::fmt(&self.bits, f)
    }
}

impl std::fmt::Octal for BitmapFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::Octal::fmt(&self.bits, f)
    }
}

impl std::fmt::LowerHex for BitmapFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::LowerHex::fmt(&self.bits, f)
    }
}

impl std::fmt::UpperHex for BitmapFlags {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        std::fmt::UpperHex::fmt(&self.bits, f)
    }
}

impl font_types::Scalar for BitmapFlags {
    type Raw = <u8 as font_types::Scalar>::Raw;
    fn to_raw(self) -> Self::Raw {
        self.bits().to_raw()
    }
    fn from_raw(raw: Self::Raw) -> Self {
        let t = <u8>::from_raw(raw);
        Self::from_bits_truncate(t)
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> From<BitmapFlags> for FieldType<'a> {
    fn from(src: BitmapFlags) -> FieldType<'a> {
        src.bits().into()
    }
}

/// [BigGlyphMetrics](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#bigglyphmetrics) record.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct BigGlyphMetrics {
    /// Number of rows of data.
    pub height: u8,
    /// Number of columns of data.
    pub width: u8,
    /// Distance in pixels from the horizontal origin to the left edge of the bitmap.
    pub hori_bearing_x: BigEndian<i8>,
    /// Distance in pixels from the horizontal origin to the top edge of the bitmap.
    pub hori_bearing_y: BigEndian<i8>,
    /// Horizontal advance width in pixels.
    pub hori_advance: u8,
    /// Distance in pixels from the vertical origin to the left edge of the bitmap.
    pub vert_bearing_x: BigEndian<i8>,
    /// Distance in pixels from the vertical origin to the top edge of the bitmap.
    pub vert_bearing_y: BigEndian<i8>,
    /// Vertical advance width in pixels.
    pub vert_advance: u8,
}

impl BigGlyphMetrics {
    /// Number of rows of data.
    pub fn height(&self) -> u8 {
        self.height
    }

    /// Number of columns of data.
    pub fn width(&self) -> u8 {
        self.width
    }

    /// Distance in pixels from the horizontal origin to the left edge of the bitmap.
    pub fn hori_bearing_x(&self) -> i8 {
        self.hori_bearing_x.get()
    }

    /// Distance in pixels from the horizontal origin to the top edge of the bitmap.
    pub fn hori_bearing_y(&self) -> i8 {
        self.hori_bearing_y.get()
    }

    /// Horizontal advance width in pixels.
    pub fn hori_advance(&self) -> u8 {
        self.hori_advance
    }

    /// Distance in pixels from the vertical origin to the left edge of the bitmap.
    pub fn vert_bearing_x(&self) -> i8 {
        self.vert_bearing_x.get()
    }

    /// Distance in pixels from the vertical origin to the top edge of the bitmap.
    pub fn vert_bearing_y(&self) -> i8 {
        self.vert_bearing_y.get()
    }

    /// Vertical advance width in pixels.
    pub fn vert_advance(&self) -> u8 {
        self.vert_advance
    }
}

impl FixedSize for BigGlyphMetrics {
    const RAW_BYTE_LEN: usize = u8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for BigGlyphMetrics {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "BigGlyphMetrics",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("height", self.height())),
                1usize => Some(Field::new("width", self.width())),
                2usize => Some(Field::new("hori_bearing_x", self.hori_bearing_x())),
                3usize => Some(Field::new("hori_bearing_y", self.hori_bearing_y())),
                4usize => Some(Field::new("hori_advance", self.hori_advance())),
                5usize => Some(Field::new("vert_bearing_x", self.vert_bearing_x())),
                6usize => Some(Field::new("vert_bearing_y", self.vert_bearing_y())),
                7usize => Some(Field::new("vert_advance", self.vert_advance())),
                _ => None,
            }),
            data,
        }
    }
}

/// [SmallGlyphMetrics](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#smallglyphmetrics) record.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct SmallGlyphMetrics {
    /// Number of rows of data.
    pub height: u8,
    /// Number of columns of data.
    pub width: u8,
    /// Distance in pixels from the horizontal origin to the left edge of the bitmap (for horizontal text); or distance in pixels from the vertical origin to the top edge of the bitmap (for vertical text).
    pub bearing_x: BigEndian<i8>,
    /// Distance in pixels from the horizontal origin to the top edge of the bitmap (for horizontal text); or distance in pixels from the vertical origin to the left edge of the bitmap (for vertical text).
    pub bearing_y: BigEndian<i8>,
    /// Horizontal or vertical advance width in pixels.
    pub advance: u8,
}

impl SmallGlyphMetrics {
    /// Number of rows of data.
    pub fn height(&self) -> u8 {
        self.height
    }

    /// Number of columns of data.
    pub fn width(&self) -> u8 {
        self.width
    }

    /// Distance in pixels from the horizontal origin to the left edge of the bitmap (for horizontal text); or distance in pixels from the vertical origin to the top edge of the bitmap (for vertical text).
    pub fn bearing_x(&self) -> i8 {
        self.bearing_x.get()
    }

    /// Distance in pixels from the horizontal origin to the top edge of the bitmap (for horizontal text); or distance in pixels from the vertical origin to the left edge of the bitmap (for vertical text).
    pub fn bearing_y(&self) -> i8 {
        self.bearing_y.get()
    }

    /// Horizontal or vertical advance width in pixels.
    pub fn advance(&self) -> u8 {
        self.advance
    }
}

impl FixedSize for SmallGlyphMetrics {
    const RAW_BYTE_LEN: usize = u8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + i8::RAW_BYTE_LEN
        + u8::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for SmallGlyphMetrics {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "SmallGlyphMetrics",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("height", self.height())),
                1usize => Some(Field::new("width", self.width())),
                2usize => Some(Field::new("bearing_x", self.bearing_x())),
                3usize => Some(Field::new("bearing_y", self.bearing_y())),
                4usize => Some(Field::new("advance", self.advance())),
                _ => None,
            }),
            data,
        }
    }
}

/// [IndexSubtableArray](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtablearray) table.
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IndexSubtableArrayMarker {}

impl IndexSubtableArrayMarker {
    fn first_glyph_index_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + GlyphId16::RAW_BYTE_LEN
    }
    fn last_glyph_index_byte_range(&self) -> Range<usize> {
        let start = self.first_glyph_index_byte_range().end;
        start..start + GlyphId16::RAW_BYTE_LEN
    }
    fn additional_offset_to_index_subtable_byte_range(&self) -> Range<usize> {
        let start = self.last_glyph_index_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
}

impl<'a> FontRead<'a> for IndexSubtableArray<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<GlyphId16>();
        cursor.advance::<GlyphId16>();
        cursor.advance::<u32>();
        cursor.finish(IndexSubtableArrayMarker {})
    }
}

/// [IndexSubtableArray](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtablearray) table.
pub type IndexSubtableArray<'a> = TableRef<'a, IndexSubtableArrayMarker>;

impl<'a> IndexSubtableArray<'a> {
    /// First glyph ID of this range.
    pub fn first_glyph_index(&self) -> GlyphId16 {
        let range = self.shape.first_glyph_index_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Last glyph ID of this range (inclusive).
    pub fn last_glyph_index(&self) -> GlyphId16 {
        let range = self.shape.last_glyph_index_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Add to indexSubTableArrayOffset to get offset from beginning of EBLC.
    pub fn additional_offset_to_index_subtable(&self) -> u32 {
        let range = self.shape.additional_offset_to_index_subtable_byte_range();
        self.data.read_at(range.start).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtableArray<'a> {
    fn type_name(&self) -> &str {
        "IndexSubtableArray"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("first_glyph_index", self.first_glyph_index())),
            1usize => Some(Field::new("last_glyph_index", self.last_glyph_index())),
            2usize => Some(Field::new(
                "additional_offset_to_index_subtable",
                self.additional_offset_to_index_subtable(),
            )),
            _ => None,
        }
    }
}

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

/// [IndexSubtables](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtables) format type.
#[derive(Clone)]
pub enum IndexSubtable<'a> {
    Format1(IndexSubtable1<'a>),
    Format2(IndexSubtable2<'a>),
    Format3(IndexSubtable3<'a>),
    Format4(IndexSubtable4<'a>),
    Format5(IndexSubtable5<'a>),
}

impl<'a> IndexSubtable<'a> {
    ///Return the `FontData` used to resolve offsets for this table.
    pub fn offset_data(&self) -> FontData<'a> {
        match self {
            Self::Format1(item) => item.offset_data(),
            Self::Format2(item) => item.offset_data(),
            Self::Format3(item) => item.offset_data(),
            Self::Format4(item) => item.offset_data(),
            Self::Format5(item) => item.offset_data(),
        }
    }

    /// Format of this IndexSubTable.
    pub fn index_format(&self) -> u16 {
        match self {
            Self::Format1(item) => item.index_format(),
            Self::Format2(item) => item.index_format(),
            Self::Format3(item) => item.index_format(),
            Self::Format4(item) => item.index_format(),
            Self::Format5(item) => item.index_format(),
        }
    }

    /// Format of EBDT image data.
    pub fn image_format(&self) -> u16 {
        match self {
            Self::Format1(item) => item.image_format(),
            Self::Format2(item) => item.image_format(),
            Self::Format3(item) => item.image_format(),
            Self::Format4(item) => item.image_format(),
            Self::Format5(item) => item.image_format(),
        }
    }

    /// Offset to image data in EBDT table.
    pub fn image_data_offset(&self) -> u32 {
        match self {
            Self::Format1(item) => item.image_data_offset(),
            Self::Format2(item) => item.image_data_offset(),
            Self::Format3(item) => item.image_data_offset(),
            Self::Format4(item) => item.image_data_offset(),
            Self::Format5(item) => item.image_data_offset(),
        }
    }
}

impl<'a> FontRead<'a> for IndexSubtable<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let format: u16 = data.read_at(0usize)?;
        match format {
            IndexSubtable1Marker::FORMAT => Ok(Self::Format1(FontRead::read(data)?)),
            IndexSubtable2Marker::FORMAT => Ok(Self::Format2(FontRead::read(data)?)),
            IndexSubtable3Marker::FORMAT => Ok(Self::Format3(FontRead::read(data)?)),
            IndexSubtable4Marker::FORMAT => Ok(Self::Format4(FontRead::read(data)?)),
            IndexSubtable5Marker::FORMAT => Ok(Self::Format5(FontRead::read(data)?)),
            other => Err(ReadError::InvalidFormat(other.into())),
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> IndexSubtable<'a> {
    fn dyn_inner<'b>(&'b self) -> &'b dyn SomeTable<'a> {
        match self {
            Self::Format1(table) => table,
            Self::Format2(table) => table,
            Self::Format3(table) => table,
            Self::Format4(table) => table,
            Self::Format5(table) => table,
        }
    }
}

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

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtable<'a> {
    fn type_name(&self) -> &str {
        self.dyn_inner().type_name()
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        self.dyn_inner().get_field(idx)
    }
}

impl Format<u16> for IndexSubtable1Marker {
    const FORMAT: u16 = 1;
}

/// [IndexSubTable1](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable1-variable-metrics-glyphs-with-4-byte-offsets): variable-metrics glyphs with 4-byte offsets.
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IndexSubtable1Marker {
    sbit_offsets_byte_len: usize,
}

impl IndexSubtable1Marker {
    fn index_format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_format_byte_range(&self) -> Range<usize> {
        let start = self.index_format_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_data_offset_byte_range(&self) -> Range<usize> {
        let start = self.image_format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn sbit_offsets_byte_range(&self) -> Range<usize> {
        let start = self.image_data_offset_byte_range().end;
        start..start + self.sbit_offsets_byte_len
    }
}

impl<'a> FontRead<'a> for IndexSubtable1<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u16>();
        cursor.advance::<u16>();
        cursor.advance::<u32>();
        let sbit_offsets_byte_len =
            cursor.remaining_bytes() / u32::RAW_BYTE_LEN * u32::RAW_BYTE_LEN;
        cursor.advance_by(sbit_offsets_byte_len);
        cursor.finish(IndexSubtable1Marker {
            sbit_offsets_byte_len,
        })
    }
}

/// [IndexSubTable1](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable1-variable-metrics-glyphs-with-4-byte-offsets): variable-metrics glyphs with 4-byte offsets.
pub type IndexSubtable1<'a> = TableRef<'a, IndexSubtable1Marker>;

impl<'a> IndexSubtable1<'a> {
    /// Format of this IndexSubTable.
    pub fn index_format(&self) -> u16 {
        let range = self.shape.index_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Format of EBDT image data.
    pub fn image_format(&self) -> u16 {
        let range = self.shape.image_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Offset to image data in EBDT table.
    pub fn image_data_offset(&self) -> u32 {
        let range = self.shape.image_data_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn sbit_offsets(&self) -> &'a [BigEndian<u32>] {
        let range = self.shape.sbit_offsets_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtable1<'a> {
    fn type_name(&self) -> &str {
        "IndexSubtable1"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("index_format", self.index_format())),
            1usize => Some(Field::new("image_format", self.image_format())),
            2usize => Some(Field::new("image_data_offset", self.image_data_offset())),
            3usize => Some(Field::new("sbit_offsets", self.sbit_offsets())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for IndexSubtable1<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

impl Format<u16> for IndexSubtable2Marker {
    const FORMAT: u16 = 2;
}

/// [IndexSubTable2](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable2-all-glyphs-have-identical-metrics): all glyphs have identical metrics.
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IndexSubtable2Marker {
    big_metrics_byte_len: usize,
}

impl IndexSubtable2Marker {
    fn index_format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_format_byte_range(&self) -> Range<usize> {
        let start = self.index_format_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_data_offset_byte_range(&self) -> Range<usize> {
        let start = self.image_format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn image_size_byte_range(&self) -> Range<usize> {
        let start = self.image_data_offset_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn big_metrics_byte_range(&self) -> Range<usize> {
        let start = self.image_size_byte_range().end;
        start..start + self.big_metrics_byte_len
    }
}

impl<'a> FontRead<'a> for IndexSubtable2<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u16>();
        cursor.advance::<u16>();
        cursor.advance::<u32>();
        cursor.advance::<u32>();
        let big_metrics_byte_len = BigGlyphMetrics::RAW_BYTE_LEN;
        cursor.advance_by(big_metrics_byte_len);
        cursor.finish(IndexSubtable2Marker {
            big_metrics_byte_len,
        })
    }
}

/// [IndexSubTable2](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable2-all-glyphs-have-identical-metrics): all glyphs have identical metrics.
pub type IndexSubtable2<'a> = TableRef<'a, IndexSubtable2Marker>;

impl<'a> IndexSubtable2<'a> {
    /// Format of this IndexSubTable.
    pub fn index_format(&self) -> u16 {
        let range = self.shape.index_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Format of EBDT image data.
    pub fn image_format(&self) -> u16 {
        let range = self.shape.image_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Offset to image data in EBDT table.
    pub fn image_data_offset(&self) -> u32 {
        let range = self.shape.image_data_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// All the glyphs are of the same size.
    pub fn image_size(&self) -> u32 {
        let range = self.shape.image_size_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// All glyphs have the same metrics; glyph data may be compressed, byte-aligned, or bit-aligned.
    pub fn big_metrics(&self) -> &'a [BigGlyphMetrics] {
        let range = self.shape.big_metrics_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtable2<'a> {
    fn type_name(&self) -> &str {
        "IndexSubtable2"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("index_format", self.index_format())),
            1usize => Some(Field::new("image_format", self.image_format())),
            2usize => Some(Field::new("image_data_offset", self.image_data_offset())),
            3usize => Some(Field::new("image_size", self.image_size())),
            4usize => Some(Field::new(
                "big_metrics",
                traversal::FieldType::array_of_records(
                    stringify!(BigGlyphMetrics),
                    self.big_metrics(),
                    self.offset_data(),
                ),
            )),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for IndexSubtable2<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

impl Format<u16> for IndexSubtable3Marker {
    const FORMAT: u16 = 3;
}

/// [IndexSubTable3](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable3-variable-metrics-glyphs-with-2-byte-offsets): variable-metrics glyphs with 2-byte offsets.
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IndexSubtable3Marker {
    sbit_offsets_byte_len: usize,
}

impl IndexSubtable3Marker {
    fn index_format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_format_byte_range(&self) -> Range<usize> {
        let start = self.index_format_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_data_offset_byte_range(&self) -> Range<usize> {
        let start = self.image_format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn sbit_offsets_byte_range(&self) -> Range<usize> {
        let start = self.image_data_offset_byte_range().end;
        start..start + self.sbit_offsets_byte_len
    }
}

impl<'a> FontRead<'a> for IndexSubtable3<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u16>();
        cursor.advance::<u16>();
        cursor.advance::<u32>();
        let sbit_offsets_byte_len =
            cursor.remaining_bytes() / u16::RAW_BYTE_LEN * u16::RAW_BYTE_LEN;
        cursor.advance_by(sbit_offsets_byte_len);
        cursor.finish(IndexSubtable3Marker {
            sbit_offsets_byte_len,
        })
    }
}

/// [IndexSubTable3](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable3-variable-metrics-glyphs-with-2-byte-offsets): variable-metrics glyphs with 2-byte offsets.
pub type IndexSubtable3<'a> = TableRef<'a, IndexSubtable3Marker>;

impl<'a> IndexSubtable3<'a> {
    /// Format of this IndexSubTable.
    pub fn index_format(&self) -> u16 {
        let range = self.shape.index_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Format of EBDT image data.
    pub fn image_format(&self) -> u16 {
        let range = self.shape.image_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Offset to image data in EBDT table.
    pub fn image_data_offset(&self) -> u32 {
        let range = self.shape.image_data_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    pub fn sbit_offsets(&self) -> &'a [BigEndian<u16>] {
        let range = self.shape.sbit_offsets_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtable3<'a> {
    fn type_name(&self) -> &str {
        "IndexSubtable3"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("index_format", self.index_format())),
            1usize => Some(Field::new("image_format", self.image_format())),
            2usize => Some(Field::new("image_data_offset", self.image_data_offset())),
            3usize => Some(Field::new("sbit_offsets", self.sbit_offsets())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for IndexSubtable3<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

impl Format<u16> for IndexSubtable4Marker {
    const FORMAT: u16 = 4;
}

/// [IndexSubTable4](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable3-variable-metrics-glyphs-with-2-byte-offsets): variable-metrics glyphs with sparse glyph codes.
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IndexSubtable4Marker {
    glyph_array_byte_len: usize,
}

impl IndexSubtable4Marker {
    fn index_format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_format_byte_range(&self) -> Range<usize> {
        let start = self.index_format_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_data_offset_byte_range(&self) -> Range<usize> {
        let start = self.image_format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn num_glyphs_byte_range(&self) -> Range<usize> {
        let start = self.image_data_offset_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn glyph_array_byte_range(&self) -> Range<usize> {
        let start = self.num_glyphs_byte_range().end;
        start..start + self.glyph_array_byte_len
    }
}

impl<'a> FontRead<'a> for IndexSubtable4<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u16>();
        cursor.advance::<u16>();
        cursor.advance::<u32>();
        let num_glyphs: u32 = cursor.read()?;
        let glyph_array_byte_len = (transforms::add(num_glyphs, 1_usize))
            .checked_mul(GlyphIdOffsetPair::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(glyph_array_byte_len);
        cursor.finish(IndexSubtable4Marker {
            glyph_array_byte_len,
        })
    }
}

/// [IndexSubTable4](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable3-variable-metrics-glyphs-with-2-byte-offsets): variable-metrics glyphs with sparse glyph codes.
pub type IndexSubtable4<'a> = TableRef<'a, IndexSubtable4Marker>;

impl<'a> IndexSubtable4<'a> {
    /// Format of this IndexSubTable.
    pub fn index_format(&self) -> u16 {
        let range = self.shape.index_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Format of EBDT image data.
    pub fn image_format(&self) -> u16 {
        let range = self.shape.image_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Offset to image data in EBDT table.
    pub fn image_data_offset(&self) -> u32 {
        let range = self.shape.image_data_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Array length.
    pub fn num_glyphs(&self) -> u32 {
        let range = self.shape.num_glyphs_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// One per glyph.
    pub fn glyph_array(&self) -> &'a [GlyphIdOffsetPair] {
        let range = self.shape.glyph_array_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtable4<'a> {
    fn type_name(&self) -> &str {
        "IndexSubtable4"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("index_format", self.index_format())),
            1usize => Some(Field::new("image_format", self.image_format())),
            2usize => Some(Field::new("image_data_offset", self.image_data_offset())),
            3usize => Some(Field::new("num_glyphs", self.num_glyphs())),
            4usize => Some(Field::new(
                "glyph_array",
                traversal::FieldType::array_of_records(
                    stringify!(GlyphIdOffsetPair),
                    self.glyph_array(),
                    self.offset_data(),
                ),
            )),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for IndexSubtable4<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

/// [GlyphIdOffsetPair](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#glyphidoffsetpair-record) record.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct GlyphIdOffsetPair {
    /// Glyph ID of glyph present.
    pub glyph_id: BigEndian<GlyphId16>,
    /// Location in EBDT.
    pub sbit_offset: BigEndian<u16>,
}

impl GlyphIdOffsetPair {
    /// Glyph ID of glyph present.
    pub fn glyph_id(&self) -> GlyphId16 {
        self.glyph_id.get()
    }

    /// Location in EBDT.
    pub fn sbit_offset(&self) -> u16 {
        self.sbit_offset.get()
    }
}

impl FixedSize for GlyphIdOffsetPair {
    const RAW_BYTE_LEN: usize = GlyphId16::RAW_BYTE_LEN + u16::RAW_BYTE_LEN;
}

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

impl Format<u16> for IndexSubtable5Marker {
    const FORMAT: u16 = 5;
}

/// [IndexSubTable5](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable5-constant-metrics-glyphs-with-sparse-glyph-codes): constant-metrics glyphs with sparse glyph codes
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct IndexSubtable5Marker {
    big_metrics_byte_len: usize,
    glyph_array_byte_len: usize,
}

impl IndexSubtable5Marker {
    fn index_format_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_format_byte_range(&self) -> Range<usize> {
        let start = self.index_format_byte_range().end;
        start..start + u16::RAW_BYTE_LEN
    }
    fn image_data_offset_byte_range(&self) -> Range<usize> {
        let start = self.image_format_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn image_size_byte_range(&self) -> Range<usize> {
        let start = self.image_data_offset_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn big_metrics_byte_range(&self) -> Range<usize> {
        let start = self.image_size_byte_range().end;
        start..start + self.big_metrics_byte_len
    }
    fn num_glyphs_byte_range(&self) -> Range<usize> {
        let start = self.big_metrics_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }
    fn glyph_array_byte_range(&self) -> Range<usize> {
        let start = self.num_glyphs_byte_range().end;
        start..start + self.glyph_array_byte_len
    }
}

impl<'a> FontRead<'a> for IndexSubtable5<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        cursor.advance::<u16>();
        cursor.advance::<u16>();
        cursor.advance::<u32>();
        cursor.advance::<u32>();
        let big_metrics_byte_len = BigGlyphMetrics::RAW_BYTE_LEN;
        cursor.advance_by(big_metrics_byte_len);
        let num_glyphs: u32 = cursor.read()?;
        let glyph_array_byte_len = (num_glyphs as usize)
            .checked_mul(GlyphId16::RAW_BYTE_LEN)
            .ok_or(ReadError::OutOfBounds)?;
        cursor.advance_by(glyph_array_byte_len);
        cursor.finish(IndexSubtable5Marker {
            big_metrics_byte_len,
            glyph_array_byte_len,
        })
    }
}

/// [IndexSubTable5](https://learn.microsoft.com/en-us/typography/opentype/spec/eblc#indexsubtable5-constant-metrics-glyphs-with-sparse-glyph-codes): constant-metrics glyphs with sparse glyph codes
pub type IndexSubtable5<'a> = TableRef<'a, IndexSubtable5Marker>;

impl<'a> IndexSubtable5<'a> {
    /// Format of this IndexSubTable.
    pub fn index_format(&self) -> u16 {
        let range = self.shape.index_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Format of EBDT image data.
    pub fn image_format(&self) -> u16 {
        let range = self.shape.image_format_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Offset to image data in EBDT table.
    pub fn image_data_offset(&self) -> u32 {
        let range = self.shape.image_data_offset_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// All glyphs have the same data size.
    pub fn image_size(&self) -> u32 {
        let range = self.shape.image_size_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// All glyphs have the same metrics.
    pub fn big_metrics(&self) -> &'a [BigGlyphMetrics] {
        let range = self.shape.big_metrics_byte_range();
        self.data.read_array(range).unwrap()
    }

    /// Array length.
    pub fn num_glyphs(&self) -> u32 {
        let range = self.shape.num_glyphs_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// One per glyph, sorted by glyhph ID.
    pub fn glyph_array(&self) -> &'a [BigEndian<GlyphId16>] {
        let range = self.shape.glyph_array_byte_range();
        self.data.read_array(range).unwrap()
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for IndexSubtable5<'a> {
    fn type_name(&self) -> &str {
        "IndexSubtable5"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        match idx {
            0usize => Some(Field::new("index_format", self.index_format())),
            1usize => Some(Field::new("image_format", self.image_format())),
            2usize => Some(Field::new("image_data_offset", self.image_data_offset())),
            3usize => Some(Field::new("image_size", self.image_size())),
            4usize => Some(Field::new(
                "big_metrics",
                traversal::FieldType::array_of_records(
                    stringify!(BigGlyphMetrics),
                    self.big_metrics(),
                    self.offset_data(),
                ),
            )),
            5usize => Some(Field::new("num_glyphs", self.num_glyphs())),
            6usize => Some(Field::new("glyph_array", self.glyph_array())),
            _ => None,
        }
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> std::fmt::Debug for IndexSubtable5<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        (self as &dyn SomeTable<'a>).fmt(f)
    }
}

/// [EbdtComponent](https://learn.microsoft.com/en-us/typography/opentype/spec/ebdt#ebdtcomponent-record) record.
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Copy, bytemuck :: AnyBitPattern)]
#[repr(C)]
#[repr(packed)]
pub struct BdtComponent {
    /// Component glyph ID.
    pub glyph_id: BigEndian<GlyphId16>,
    /// Position of component left.
    pub x_offset: BigEndian<i8>,
    /// Position of component top.
    pub y_offset: BigEndian<i8>,
}

impl BdtComponent {
    /// Component glyph ID.
    pub fn glyph_id(&self) -> GlyphId16 {
        self.glyph_id.get()
    }

    /// Position of component left.
    pub fn x_offset(&self) -> i8 {
        self.x_offset.get()
    }

    /// Position of component top.
    pub fn y_offset(&self) -> i8 {
        self.y_offset.get()
    }
}

impl FixedSize for BdtComponent {
    const RAW_BYTE_LEN: usize = GlyphId16::RAW_BYTE_LEN + i8::RAW_BYTE_LEN + i8::RAW_BYTE_LEN;
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeRecord<'a> for BdtComponent {
    fn traverse(self, data: FontData<'a>) -> RecordResolver<'a> {
        RecordResolver {
            name: "BdtComponent",
            get_field: Box::new(move |idx, _data| match idx {
                0usize => Some(Field::new("glyph_id", self.glyph_id())),
                1usize => Some(Field::new("x_offset", self.x_offset())),
                2usize => Some(Field::new("y_offset", self.y_offset())),
                _ => None,
            }),
            data,
        }
    }
}