read_fonts/generated/

generated_post.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::*;

/// [post (PostScript)](https://docs.microsoft.com/en-us/typography/opentype/spec/post#header) table
#[derive(Debug, Clone, Copy)]
#[doc(hidden)]
pub struct PostMarker {
    num_glyphs_byte_start: Option<usize>,
    glyph_name_index_byte_start: Option<usize>,
    glyph_name_index_byte_len: Option<usize>,
    string_data_byte_start: Option<usize>,
    string_data_byte_len: Option<usize>,
}

impl PostMarker {
    pub fn version_byte_range(&self) -> Range<usize> {
        let start = 0;
        start..start + Version16Dot16::RAW_BYTE_LEN
    }

    pub fn italic_angle_byte_range(&self) -> Range<usize> {
        let start = self.version_byte_range().end;
        start..start + Fixed::RAW_BYTE_LEN
    }

    pub fn underline_position_byte_range(&self) -> Range<usize> {
        let start = self.italic_angle_byte_range().end;
        start..start + FWord::RAW_BYTE_LEN
    }

    pub fn underline_thickness_byte_range(&self) -> Range<usize> {
        let start = self.underline_position_byte_range().end;
        start..start + FWord::RAW_BYTE_LEN
    }

    pub fn is_fixed_pitch_byte_range(&self) -> Range<usize> {
        let start = self.underline_thickness_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn min_mem_type42_byte_range(&self) -> Range<usize> {
        let start = self.is_fixed_pitch_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn max_mem_type42_byte_range(&self) -> Range<usize> {
        let start = self.min_mem_type42_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn min_mem_type1_byte_range(&self) -> Range<usize> {
        let start = self.max_mem_type42_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn max_mem_type1_byte_range(&self) -> Range<usize> {
        let start = self.min_mem_type1_byte_range().end;
        start..start + u32::RAW_BYTE_LEN
    }

    pub fn num_glyphs_byte_range(&self) -> Option<Range<usize>> {
        let start = self.num_glyphs_byte_start?;
        Some(start..start + u16::RAW_BYTE_LEN)
    }

    pub fn glyph_name_index_byte_range(&self) -> Option<Range<usize>> {
        let start = self.glyph_name_index_byte_start?;
        Some(start..start + self.glyph_name_index_byte_len?)
    }

    pub fn string_data_byte_range(&self) -> Option<Range<usize>> {
        let start = self.string_data_byte_start?;
        Some(start..start + self.string_data_byte_len?)
    }
}

impl TopLevelTable for Post<'_> {
    /// `post`
    const TAG: Tag = Tag::new(b"post");
}

impl<'a> FontRead<'a> for Post<'a> {
    fn read(data: FontData<'a>) -> Result<Self, ReadError> {
        let mut cursor = data.cursor();
        let version: Version16Dot16 = cursor.read()?;
        cursor.advance::<Fixed>();
        cursor.advance::<FWord>();
        cursor.advance::<FWord>();
        cursor.advance::<u32>();
        cursor.advance::<u32>();
        cursor.advance::<u32>();
        cursor.advance::<u32>();
        cursor.advance::<u32>();
        let num_glyphs_byte_start = version
            .compatible((2u16, 0u16))
            .then(|| cursor.position())
            .transpose()?;
        let num_glyphs = version
            .compatible((2u16, 0u16))
            .then(|| cursor.read::<u16>())
            .transpose()?
            .unwrap_or(0);
        let glyph_name_index_byte_start = version
            .compatible((2u16, 0u16))
            .then(|| cursor.position())
            .transpose()?;
        let glyph_name_index_byte_len = version.compatible((2u16, 0u16)).then_some(
            (num_glyphs as usize)
                .checked_mul(u16::RAW_BYTE_LEN)
                .ok_or(ReadError::OutOfBounds)?,
        );
        if let Some(value) = glyph_name_index_byte_len {
            cursor.advance_by(value);
        }
        let string_data_byte_start = version
            .compatible((2u16, 0u16))
            .then(|| cursor.position())
            .transpose()?;
        let string_data_byte_len = version
            .compatible((2u16, 0u16))
            .then_some(cursor.remaining_bytes());
        if let Some(value) = string_data_byte_len {
            cursor.advance_by(value);
        }
        cursor.finish(PostMarker {
            num_glyphs_byte_start,
            glyph_name_index_byte_start,
            glyph_name_index_byte_len,
            string_data_byte_start,
            string_data_byte_len,
        })
    }
}

/// [post (PostScript)](https://docs.microsoft.com/en-us/typography/opentype/spec/post#header) table
pub type Post<'a> = TableRef<'a, PostMarker>;

#[allow(clippy::needless_lifetimes)]
impl<'a> Post<'a> {
    /// 0x00010000 for version 1.0 0x00020000 for version 2.0
    /// 0x00025000 for version 2.5 (deprecated) 0x00030000 for version
    /// 3.0
    pub fn version(&self) -> Version16Dot16 {
        let range = self.shape.version_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Italic angle in counter-clockwise degrees from the vertical.
    /// Zero for upright text, negative for text that leans to the
    /// right (forward).
    pub fn italic_angle(&self) -> Fixed {
        let range = self.shape.italic_angle_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// This is the suggested distance of the top of the underline from
    /// the baseline (negative values indicate below baseline). The
    /// PostScript definition of this FontInfo dictionary key (the y
    /// coordinate of the center of the stroke) is not used for
    /// historical reasons. The value of the PostScript key may be
    /// calculated by subtracting half the underlineThickness from the
    /// value of this field.
    pub fn underline_position(&self) -> FWord {
        let range = self.shape.underline_position_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Suggested values for the underline thickness. In general, the
    /// underline thickness should match the thickness of the
    /// underscore character (U+005F LOW LINE), and should also match
    /// the strikeout thickness, which is specified in the OS/2 table.
    pub fn underline_thickness(&self) -> FWord {
        let range = self.shape.underline_thickness_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Set to 0 if the font is proportionally spaced, non-zero if the
    /// font is not proportionally spaced (i.e. monospaced).
    pub fn is_fixed_pitch(&self) -> u32 {
        let range = self.shape.is_fixed_pitch_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Minimum memory usage when an OpenType font is downloaded.
    pub fn min_mem_type42(&self) -> u32 {
        let range = self.shape.min_mem_type42_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Maximum memory usage when an OpenType font is downloaded.
    pub fn max_mem_type42(&self) -> u32 {
        let range = self.shape.max_mem_type42_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Minimum memory usage when an OpenType font is downloaded as a
    /// Type 1 font.
    pub fn min_mem_type1(&self) -> u32 {
        let range = self.shape.min_mem_type1_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Maximum memory usage when an OpenType font is downloaded as a
    /// Type 1 font.
    pub fn max_mem_type1(&self) -> u32 {
        let range = self.shape.max_mem_type1_byte_range();
        self.data.read_at(range.start).unwrap()
    }

    /// Number of glyphs (this should be the same as numGlyphs in
    /// 'maxp' table).
    pub fn num_glyphs(&self) -> Option<u16> {
        let range = self.shape.num_glyphs_byte_range()?;
        Some(self.data.read_at(range.start).unwrap())
    }

    /// Array of indices into the string data. See below for details.
    pub fn glyph_name_index(&self) -> Option<&'a [BigEndian<u16>]> {
        let range = self.shape.glyph_name_index_byte_range()?;
        Some(self.data.read_array(range).unwrap())
    }

    /// Storage for the string data.
    pub fn string_data(&self) -> Option<VarLenArray<'a, PString<'a>>> {
        let range = self.shape.string_data_byte_range()?;
        Some(VarLenArray::read(self.data.split_off(range.start).unwrap()).unwrap())
    }
}

#[cfg(feature = "experimental_traverse")]
impl<'a> SomeTable<'a> for Post<'a> {
    fn type_name(&self) -> &str {
        "Post"
    }
    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
        let version = self.version();
        match idx {
            0usize => Some(Field::new("version", self.version())),
            1usize => Some(Field::new("italic_angle", self.italic_angle())),
            2usize => Some(Field::new("underline_position", self.underline_position())),
            3usize => Some(Field::new(
                "underline_thickness",
                self.underline_thickness(),
            )),
            4usize => Some(Field::new("is_fixed_pitch", self.is_fixed_pitch())),
            5usize => Some(Field::new("min_mem_type42", self.min_mem_type42())),
            6usize => Some(Field::new("max_mem_type42", self.max_mem_type42())),
            7usize => Some(Field::new("min_mem_type1", self.min_mem_type1())),
            8usize => Some(Field::new("max_mem_type1", self.max_mem_type1())),
            9usize if version.compatible((2u16, 0u16)) => {
                Some(Field::new("num_glyphs", self.num_glyphs().unwrap()))
            }
            10usize if version.compatible((2u16, 0u16)) => Some(Field::new(
                "glyph_name_index",
                self.glyph_name_index().unwrap(),
            )),
            11usize if version.compatible((2u16, 0u16)) => {
                Some(Field::new("string_data", self.traverse_string_data()))
            }
            _ => None,
        }
    }
}

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