ttf_parser/tables/
svg.rs

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1// https://docs.microsoft.com/en-us/typography/opentype/spec/svg
2
3use crate::GlyphId;
4use crate::parser::{Stream, FromData, Offset, Offset32, NumFrom};
5
6
7#[derive(Clone, Copy)]
8struct SvgDocumentRecord {
9    start_glyph_id: GlyphId,
10    end_glyph_id: GlyphId,
11    svg_doc_offset: Option<Offset32>,
12    svg_doc_length: u32,
13}
14
15impl FromData for SvgDocumentRecord {
16    const SIZE: usize = 12;
17
18    #[inline]
19    fn parse(data: &[u8]) -> Option<Self> {
20        let mut s = Stream::new(data);
21        Some(SvgDocumentRecord {
22            start_glyph_id: s.read::<GlyphId>()?,
23            end_glyph_id: s.read::<GlyphId>()?,
24            svg_doc_offset: s.read::<Option<Offset32>>()?,
25            svg_doc_length: s.read::<u32>()?,
26        })
27    }
28}
29
30
31pub fn parse(
32    data: &[u8],
33    glyph_id: GlyphId,
34) -> Option<&[u8]> {
35    let mut s = Stream::new(data);
36    s.skip::<u16>(); // version
37    let doc_list_offset = s.read::<Option<Offset32>>()??;
38
39    let mut s = Stream::new_at(data, doc_list_offset.to_usize())?;
40    let count: u16 = s.read()?;
41    let records = s.read_array16::<SvgDocumentRecord>(count)?;
42    let record = records.into_iter()
43        .find(|rec| (rec.start_glyph_id..=rec.end_glyph_id).contains(&glyph_id))?;
44
45    let svg_offset = record.svg_doc_offset?;
46    let mut s = Stream::new_at(data, doc_list_offset.to_usize() + svg_offset.to_usize())?;
47    let svg_data = s.read_bytes(usize::num_from(record.svg_doc_length))?;
48
49    Some(svg_data)
50}
ttf_parser/tables/svg.rs

ttf_parser/tables/
svg.rs
