hayro_cmap/bcmap/
embedded.rs

1use std::ops::Range;
2use std::sync::LazyLock;
3
4use super::huffman::{self, HuffmanTable};
5use super::reader::Reader;
6use crate::CMapName;
7
8pub(super) static BUNDLE: LazyLock<Bundle> = LazyLock::new(|| {
9    // We already know the bundle is valid, so we can skip validation and just
10    // unwrap everywhere.
11
12    let compressed = include_bytes!("../../assets/cmaps.brotli");
13    let mut decompressed = Vec::new();
14    let mut reader = compressed.as_slice();
15
16    brotli::BrotliDecompress(&mut reader, &mut decompressed)
17        .ok()
18        .unwrap();
19
20    let mut reader = Reader::new(&decompressed);
21    let huff_size = reader.read_u32().unwrap() as usize;
22    let huff_data = reader.read_bytes(huff_size).unwrap();
23    let (delta_table, count_table) = huffman::decode_tables(huff_data).unwrap();
24
25    let mut entries = Vec::new();
26
27    while !reader.at_end() {
28        let start = reader.position();
29
30        // Skip file magic and version.
31        reader.read_bytes(6).unwrap();
32        let file_len = reader.read_u32().unwrap() as usize;
33
34        reader.read_bytes(file_len - 10).unwrap();
35        entries.push(start..start + file_len);
36    }
37
38    Bundle {
39        data: decompressed,
40        delta_table,
41        count_table,
42        entries,
43    }
44});
45
46pub(super) struct Bundle {
47    data: Vec<u8>,
48    pub(super) delta_table: HuffmanTable,
49    pub(super) count_table: HuffmanTable,
50    entries: Vec<Range<usize>>,
51}
52
53/// Load the data for a cmap file, by name.
54pub fn load_embedded(name: CMapName<'_>) -> Option<&'static [u8]> {
55    // Get the index of the font of the cmap in the bundle. They are sorted
56    // alphabetically.
57    let idx = match name {
58        CMapName::N83pvRksjH => 0,
59        CMapName::N90msRksjH => 1,
60        CMapName::N90msRksjV => 2,
61        CMapName::N90mspRksjH => 3,
62        CMapName::N90mspRksjV => 4,
63        CMapName::N90pvRksjH => 5,
64        CMapName::AddRksjH => 6,
65        CMapName::AddRksjV => 7,
66        CMapName::AdobeCns1Ucs2 => 8,
67        CMapName::AdobeGb1Ucs2 => 9,
68        CMapName::AdobeJapan1Ucs2 => 10,
69        CMapName::AdobeKorea1Ucs2 => 11,
70        CMapName::B5pcH => 12,
71        CMapName::B5pcV => 13,
72        CMapName::CnsEucH => 14,
73        CMapName::CnsEucV => 15,
74        CMapName::ETenB5H => 16,
75        CMapName::ETenB5V => 17,
76        CMapName::ETenmsB5H => 18,
77        CMapName::ETenmsB5V => 19,
78        CMapName::EucH => 20,
79        CMapName::EucV => 21,
80        CMapName::ExtRksjH => 22,
81        CMapName::ExtRksjV => 23,
82        CMapName::GbEucH => 24,
83        CMapName::GbEucV => 25,
84        CMapName::GbkEucH => 26,
85        CMapName::GbkEucV => 27,
86        CMapName::Gbk2kH => 28,
87        CMapName::Gbk2kV => 29,
88        CMapName::GbkpEucH => 30,
89        CMapName::GbkpEucV => 31,
90        CMapName::GbpcEucH => 32,
91        CMapName::GbpcEucV => 33,
92        CMapName::H => 34,
93        CMapName::HKscsB5H => 35,
94        CMapName::HKscsB5V => 36,
95        CMapName::IdentityH => 37,
96        CMapName::IdentityV => 38,
97        CMapName::KscEucH => 39,
98        CMapName::KscEucV => 40,
99        CMapName::KscmsUhcH => 41,
100        CMapName::KscmsUhcHwH => 42,
101        CMapName::KscmsUhcHwV => 43,
102        CMapName::KscmsUhcV => 44,
103        CMapName::KscpcEucH => 45,
104        CMapName::UniCnsUcs2H => 46,
105        CMapName::UniCnsUcs2V => 47,
106        CMapName::UniCnsUtf16H => 48,
107        CMapName::UniCnsUtf16V => 49,
108        CMapName::UniGbUcs2H => 50,
109        CMapName::UniGbUcs2V => 51,
110        CMapName::UniGbUtf16H => 52,
111        CMapName::UniGbUtf16V => 53,
112        CMapName::UniJisUcs2H => 54,
113        CMapName::UniJisUcs2HwH => 55,
114        CMapName::UniJisUcs2HwV => 56,
115        CMapName::UniJisUcs2V => 57,
116        CMapName::UniJisUtf16H => 58,
117        CMapName::UniJisUtf16V => 59,
118        CMapName::UniKsUcs2H => 60,
119        CMapName::UniKsUcs2V => 61,
120        CMapName::UniKsUtf16H => 62,
121        CMapName::UniKsUtf16V => 63,
122        CMapName::V => 64,
123        CMapName::Custom(_) => return None,
124    };
125
126    let range = BUNDLE.entries.get(idx)?;
127
128    Some(&BUNDLE.data[range.clone()])
129}
hayro_cmap/bcmap/embedded.rs

hayro_cmap/bcmap/
embedded.rs
