read_fonts/generated/
generated_gvar.rs

1// THIS FILE IS AUTOGENERATED.
2// Any changes to this file will be overwritten.
3// For more information about how codegen works, see font-codegen/README.md
4
5#[allow(unused_imports)]
6use crate::codegen_prelude::*;
7
8impl<'a> MinByteRange<'a> for Gvar<'a> {
9    fn min_byte_range(&self) -> Range<usize> {
10        0..self.glyph_variation_data_offsets_byte_range().end
11    }
12    fn min_table_bytes(&self) -> &'a [u8] {
13        let range = self.min_byte_range();
14        self.data.as_bytes().get(range).unwrap_or_default()
15    }
16}
17
18impl TopLevelTable for Gvar<'_> {
19    /// `gvar`
20    const TAG: Tag = Tag::new(b"gvar");
21}
22
23impl ReadArgs for Gvar<'_> {
24    type Args = ();
25}
26
27impl<'a> FontRead<'a> for Gvar<'a> {
28    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
29        #[allow(clippy::absurd_extreme_comparisons)]
30        if data.len() < Self::MIN_SIZE {
31            return Err(ReadError::OutOfBounds);
32        }
33        Ok(Self { data })
34    }
35}
36
37/// The ['gvar' header](https://learn.microsoft.com/en-us/typography/opentype/spec/gvar#gvar-header)
38#[derive(Clone)]
39pub struct Gvar<'a> {
40    data: FontData<'a>,
41}
42
43#[allow(clippy::needless_lifetimes)]
44impl<'a> Gvar<'a> {
45    pub const MIN_SIZE: usize = (MajorMinor::RAW_BYTE_LEN
46        + u16::RAW_BYTE_LEN
47        + u16::RAW_BYTE_LEN
48        + Offset32::RAW_BYTE_LEN
49        + u16::RAW_BYTE_LEN
50        + GvarFlags::RAW_BYTE_LEN
51        + u32::RAW_BYTE_LEN);
52    basic_table_impls!(impl_the_methods);
53
54    /// Major/minor version number of the glyph variations table — set to (1,0).
55    pub fn version(&self) -> MajorMinor {
56        let range = self.version_byte_range();
57        self.data.read_at(range.start).ok().unwrap()
58    }
59
60    /// The number of variation axes for this font. This must be the
61    /// same number as axisCount in the 'fvar' table.
62    pub fn axis_count(&self) -> u16 {
63        let range = self.axis_count_byte_range();
64        self.data.read_at(range.start).ok().unwrap()
65    }
66
67    /// The number of shared tuple records. Shared tuple records can be
68    /// referenced within glyph variation data tables for multiple
69    /// glyphs, as opposed to other tuple records stored directly
70    /// within a glyph variation data table.
71    pub fn shared_tuple_count(&self) -> u16 {
72        let range = self.shared_tuple_count_byte_range();
73        self.data.read_at(range.start).ok().unwrap()
74    }
75
76    /// Offset from the start of this table to the shared tuple records.
77    pub fn shared_tuples_offset(&self) -> Offset32 {
78        let range = self.shared_tuples_offset_byte_range();
79        self.data.read_at(range.start).ok().unwrap()
80    }
81
82    /// Attempt to resolve [`shared_tuples_offset`][Self::shared_tuples_offset].
83    pub fn shared_tuples(&self) -> Result<SharedTuples<'a>, ReadError> {
84        let data = self.data;
85        let args = (self.shared_tuple_count(), self.axis_count());
86        self.shared_tuples_offset().resolve_with_args(data, args)
87    }
88
89    /// The number of glyphs in this font. This must match the number
90    /// of glyphs stored elsewhere in the font.
91    pub fn glyph_count(&self) -> u16 {
92        let range = self.glyph_count_byte_range();
93        self.data.read_at(range.start).ok().unwrap()
94    }
95
96    /// Bit-field that gives the format of the offset array that
97    /// follows. If bit 0 is clear, the offsets are uint16; if bit 0 is
98    /// set, the offsets are uint32.
99    pub fn flags(&self) -> GvarFlags {
100        let range = self.flags_byte_range();
101        self.data.read_at(range.start).ok().unwrap()
102    }
103
104    /// Offset from the start of this table to the array of
105    /// GlyphVariationData tables.
106    pub fn glyph_variation_data_array_offset(&self) -> u32 {
107        let range = self.glyph_variation_data_array_offset_byte_range();
108        self.data.read_at(range.start).ok().unwrap()
109    }
110
111    /// Offsets from the start of the GlyphVariationData array to each
112    /// GlyphVariationData table.
113    pub fn glyph_variation_data_offsets(&self) -> ComputedArray<'a, U16Or32> {
114        let range = self.glyph_variation_data_offsets_byte_range();
115        self.data
116            .read_with_args(range, self.flags())
117            .unwrap_or_default()
118    }
119
120    pub fn version_byte_range(&self) -> Range<usize> {
121        let start = 0;
122        let end = start + MajorMinor::RAW_BYTE_LEN;
123        start..end
124    }
125
126    pub fn axis_count_byte_range(&self) -> Range<usize> {
127        let start = self.version_byte_range().end;
128        let end = start + u16::RAW_BYTE_LEN;
129        start..end
130    }
131
132    pub fn shared_tuple_count_byte_range(&self) -> Range<usize> {
133        let start = self.axis_count_byte_range().end;
134        let end = start + u16::RAW_BYTE_LEN;
135        start..end
136    }
137
138    pub fn shared_tuples_offset_byte_range(&self) -> Range<usize> {
139        let start = self.shared_tuple_count_byte_range().end;
140        let end = start + Offset32::RAW_BYTE_LEN;
141        start..end
142    }
143
144    pub fn glyph_count_byte_range(&self) -> Range<usize> {
145        let start = self.shared_tuples_offset_byte_range().end;
146        let end = start + u16::RAW_BYTE_LEN;
147        start..end
148    }
149
150    pub fn flags_byte_range(&self) -> Range<usize> {
151        let start = self.glyph_count_byte_range().end;
152        let end = start + GvarFlags::RAW_BYTE_LEN;
153        start..end
154    }
155
156    pub fn glyph_variation_data_array_offset_byte_range(&self) -> Range<usize> {
157        let start = self.flags_byte_range().end;
158        let end = start + u32::RAW_BYTE_LEN;
159        start..end
160    }
161
162    pub fn glyph_variation_data_offsets_byte_range(&self) -> Range<usize> {
163        let glyph_count = self.glyph_count();
164        let start = self.glyph_variation_data_array_offset_byte_range().end;
165        let end = start
166            + (transforms::add(glyph_count, 1_usize))
167                .saturating_mul(<U16Or32 as ComputeSize>::compute_size(self.flags()).unwrap_or(0));
168        start..end
169    }
170}
171
172const _: () = assert!(FontData::default_data_long_enough(Gvar::MIN_SIZE));
173
174impl Default for Gvar<'_> {
175    fn default() -> Self {
176        Self {
177            data: FontData::default_table_data(),
178        }
179    }
180}
181
182#[cfg(feature = "experimental_traverse")]
183impl<'a> SomeTable<'a> for Gvar<'a> {
184    fn type_name(&self) -> &str {
185        "Gvar"
186    }
187    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
188        match idx {
189            0usize => Some(Field::new("version", self.version())),
190            1usize => Some(Field::new("axis_count", self.axis_count())),
191            2usize => Some(Field::new("shared_tuple_count", self.shared_tuple_count())),
192            3usize => Some(Field::new(
193                "shared_tuples_offset",
194                FieldType::offset(self.shared_tuples_offset(), self.shared_tuples()),
195            )),
196            4usize => Some(Field::new("glyph_count", self.glyph_count())),
197            5usize => Some(Field::new("flags", self.flags())),
198            6usize => Some(Field::new(
199                "glyph_variation_data_array_offset",
200                self.glyph_variation_data_array_offset(),
201            )),
202            7usize => Some(Field::new(
203                "glyph_variation_data_offsets",
204                traversal::FieldType::Unknown,
205            )),
206            _ => None,
207        }
208    }
209}
210
211#[cfg(feature = "experimental_traverse")]
212#[allow(clippy::needless_lifetimes)]
213impl<'a> std::fmt::Debug for Gvar<'a> {
214    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
215        (self as &dyn SomeTable<'a>).fmt(f)
216    }
217}
218
219#[derive(Clone, Copy, Default, PartialEq, Eq, PartialOrd, Ord, Hash, bytemuck :: AnyBitPattern)]
220#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
221#[repr(transparent)]
222pub struct GvarFlags {
223    bits: u16,
224}
225
226impl GvarFlags {
227    /// If set, offsets to GlyphVariationData are 32 bits
228    pub const LONG_OFFSETS: Self = Self { bits: 1 };
229}
230
231impl GvarFlags {
232    ///  Returns an empty set of flags.
233    #[inline]
234    pub const fn empty() -> Self {
235        Self { bits: 0 }
236    }
237
238    /// Returns the set containing all flags.
239    #[inline]
240    pub const fn all() -> Self {
241        Self {
242            bits: Self::LONG_OFFSETS.bits,
243        }
244    }
245
246    /// Returns the raw value of the flags currently stored.
247    #[inline]
248    pub const fn bits(&self) -> u16 {
249        self.bits
250    }
251
252    /// Convert from underlying bit representation, unless that
253    /// representation contains bits that do not correspond to a flag.
254    #[inline]
255    pub const fn from_bits(bits: u16) -> Option<Self> {
256        if (bits & !Self::all().bits()) == 0 {
257            Some(Self { bits })
258        } else {
259            None
260        }
261    }
262
263    /// Convert from underlying bit representation, dropping any bits
264    /// that do not correspond to flags.
265    #[inline]
266    pub const fn from_bits_truncate(bits: u16) -> Self {
267        Self {
268            bits: bits & Self::all().bits,
269        }
270    }
271
272    /// Returns `true` if no flags are currently stored.
273    #[inline]
274    pub const fn is_empty(&self) -> bool {
275        self.bits() == Self::empty().bits()
276    }
277
278    /// Returns `true` if there are flags common to both `self` and `other`.
279    #[inline]
280    pub const fn intersects(&self, other: Self) -> bool {
281        !(Self {
282            bits: self.bits & other.bits,
283        })
284        .is_empty()
285    }
286
287    /// Returns `true` if all of the flags in `other` are contained within `self`.
288    #[inline]
289    pub const fn contains(&self, other: Self) -> bool {
290        (self.bits & other.bits) == other.bits
291    }
292
293    /// Inserts the specified flags in-place.
294    #[inline]
295    pub fn insert(&mut self, other: Self) {
296        self.bits |= other.bits;
297    }
298
299    /// Removes the specified flags in-place.
300    #[inline]
301    pub fn remove(&mut self, other: Self) {
302        self.bits &= !other.bits;
303    }
304
305    /// Toggles the specified flags in-place.
306    #[inline]
307    pub fn toggle(&mut self, other: Self) {
308        self.bits ^= other.bits;
309    }
310
311    /// Returns the intersection between the flags in `self` and
312    /// `other`.
313    ///
314    /// Specifically, the returned set contains only the flags which are
315    /// present in *both* `self` *and* `other`.
316    ///
317    /// This is equivalent to using the `&` operator (e.g.
318    /// [`ops::BitAnd`]), as in `flags & other`.
319    ///
320    /// [`ops::BitAnd`]: https://doc.rust-lang.org/std/ops/trait.BitAnd.html
321    #[inline]
322    #[must_use]
323    pub const fn intersection(self, other: Self) -> Self {
324        Self {
325            bits: self.bits & other.bits,
326        }
327    }
328
329    /// Returns the union of between the flags in `self` and `other`.
330    ///
331    /// Specifically, the returned set contains all flags which are
332    /// present in *either* `self` *or* `other`, including any which are
333    /// present in both.
334    ///
335    /// This is equivalent to using the `|` operator (e.g.
336    /// [`ops::BitOr`]), as in `flags | other`.
337    ///
338    /// [`ops::BitOr`]: https://doc.rust-lang.org/std/ops/trait.BitOr.html
339    #[inline]
340    #[must_use]
341    pub const fn union(self, other: Self) -> Self {
342        Self {
343            bits: self.bits | other.bits,
344        }
345    }
346
347    /// Returns the difference between the flags in `self` and `other`.
348    ///
349    /// Specifically, the returned set contains all flags present in
350    /// `self`, except for the ones present in `other`.
351    ///
352    /// It is also conceptually equivalent to the "bit-clear" operation:
353    /// `flags & !other` (and this syntax is also supported).
354    ///
355    /// This is equivalent to using the `-` operator (e.g.
356    /// [`ops::Sub`]), as in `flags - other`.
357    ///
358    /// [`ops::Sub`]: https://doc.rust-lang.org/std/ops/trait.Sub.html
359    #[inline]
360    #[must_use]
361    pub const fn difference(self, other: Self) -> Self {
362        Self {
363            bits: self.bits & !other.bits,
364        }
365    }
366}
367
368impl std::ops::BitOr for GvarFlags {
369    type Output = Self;
370
371    /// Returns the union of the two sets of flags.
372    #[inline]
373    fn bitor(self, other: GvarFlags) -> Self {
374        Self {
375            bits: self.bits | other.bits,
376        }
377    }
378}
379
380impl std::ops::BitOrAssign for GvarFlags {
381    /// Adds the set of flags.
382    #[inline]
383    fn bitor_assign(&mut self, other: Self) {
384        self.bits |= other.bits;
385    }
386}
387
388impl std::ops::BitXor for GvarFlags {
389    type Output = Self;
390
391    /// Returns the left flags, but with all the right flags toggled.
392    #[inline]
393    fn bitxor(self, other: Self) -> Self {
394        Self {
395            bits: self.bits ^ other.bits,
396        }
397    }
398}
399
400impl std::ops::BitXorAssign for GvarFlags {
401    /// Toggles the set of flags.
402    #[inline]
403    fn bitxor_assign(&mut self, other: Self) {
404        self.bits ^= other.bits;
405    }
406}
407
408impl std::ops::BitAnd for GvarFlags {
409    type Output = Self;
410
411    /// Returns the intersection between the two sets of flags.
412    #[inline]
413    fn bitand(self, other: Self) -> Self {
414        Self {
415            bits: self.bits & other.bits,
416        }
417    }
418}
419
420impl std::ops::BitAndAssign for GvarFlags {
421    /// Disables all flags disabled in the set.
422    #[inline]
423    fn bitand_assign(&mut self, other: Self) {
424        self.bits &= other.bits;
425    }
426}
427
428impl std::ops::Sub for GvarFlags {
429    type Output = Self;
430
431    /// Returns the set difference of the two sets of flags.
432    #[inline]
433    fn sub(self, other: Self) -> Self {
434        Self {
435            bits: self.bits & !other.bits,
436        }
437    }
438}
439
440impl std::ops::SubAssign for GvarFlags {
441    /// Disables all flags enabled in the set.
442    #[inline]
443    fn sub_assign(&mut self, other: Self) {
444        self.bits &= !other.bits;
445    }
446}
447
448impl std::ops::Not for GvarFlags {
449    type Output = Self;
450
451    /// Returns the complement of this set of flags.
452    #[inline]
453    fn not(self) -> Self {
454        Self { bits: !self.bits } & Self::all()
455    }
456}
457
458impl std::fmt::Debug for GvarFlags {
459    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
460        let members: &[(&str, Self)] = &[("LONG_OFFSETS", Self::LONG_OFFSETS)];
461        let mut first = true;
462        for (name, value) in members {
463            if self.contains(*value) {
464                if !first {
465                    f.write_str(" | ")?;
466                }
467                first = false;
468                f.write_str(name)?;
469            }
470        }
471        if first {
472            f.write_str("(empty)")?;
473        }
474        Ok(())
475    }
476}
477
478impl std::fmt::Binary for GvarFlags {
479    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
480        std::fmt::Binary::fmt(&self.bits, f)
481    }
482}
483
484impl std::fmt::Octal for GvarFlags {
485    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
486        std::fmt::Octal::fmt(&self.bits, f)
487    }
488}
489
490impl std::fmt::LowerHex for GvarFlags {
491    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
492        std::fmt::LowerHex::fmt(&self.bits, f)
493    }
494}
495
496impl std::fmt::UpperHex for GvarFlags {
497    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
498        std::fmt::UpperHex::fmt(&self.bits, f)
499    }
500}
501
502impl font_types::Scalar for GvarFlags {
503    type Raw = <u16 as font_types::Scalar>::Raw;
504    fn to_raw(self) -> Self::Raw {
505        self.bits().to_raw()
506    }
507    fn from_raw(raw: Self::Raw) -> Self {
508        let t = <u16>::from_raw(raw);
509        Self::from_bits_truncate(t)
510    }
511}
512
513#[cfg(feature = "experimental_traverse")]
514impl<'a> From<GvarFlags> for FieldType<'a> {
515    fn from(src: GvarFlags) -> FieldType<'a> {
516        src.bits().into()
517    }
518}
519
520impl<'a> MinByteRange<'a> for SharedTuples<'a> {
521    fn min_byte_range(&self) -> Range<usize> {
522        0..self.tuples_byte_range().end
523    }
524    fn min_table_bytes(&self) -> &'a [u8] {
525        let range = self.min_byte_range();
526        self.data.as_bytes().get(range).unwrap_or_default()
527    }
528}
529
530impl ReadArgs for SharedTuples<'_> {
531    type Args = (u16, u16);
532}
533
534impl<'a> FontRead<'a> for SharedTuples<'a> {
535    fn read_with_args(data: FontData<'a>, args: (u16, u16)) -> Result<Self, ReadError> {
536        let (shared_tuple_count, axis_count) = args;
537
538        #[allow(clippy::absurd_extreme_comparisons)]
539        if data.len() < Self::MIN_SIZE {
540            return Err(ReadError::OutOfBounds);
541        }
542        Ok(Self {
543            data,
544            shared_tuple_count,
545            axis_count,
546        })
547    }
548}
549
550impl<'a> SharedTuples<'a> {
551    /// A constructor that requires additional arguments.
552    ///
553    /// This type requires some external state in order to be
554    /// parsed.
555    pub fn read(
556        data: FontData<'a>,
557        shared_tuple_count: u16,
558        axis_count: u16,
559    ) -> Result<Self, ReadError> {
560        let args = (shared_tuple_count, axis_count);
561        Self::read_with_args(data, args)
562    }
563}
564
565/// Array of tuple records shared across all glyph variation data tables.
566#[derive(Clone)]
567pub struct SharedTuples<'a> {
568    data: FontData<'a>,
569    shared_tuple_count: u16,
570    axis_count: u16,
571}
572
573#[allow(clippy::needless_lifetimes)]
574impl<'a> SharedTuples<'a> {
575    pub const MIN_SIZE: usize = 0;
576    basic_table_impls!(impl_the_methods);
577
578    pub fn tuples(&self) -> ComputedArray<'a, Tuple<'a>> {
579        let range = self.tuples_byte_range();
580        self.data
581            .read_with_args(range, self.axis_count())
582            .unwrap_or_default()
583    }
584
585    pub(crate) fn shared_tuple_count(&self) -> u16 {
586        self.shared_tuple_count
587    }
588
589    pub(crate) fn axis_count(&self) -> u16 {
590        self.axis_count
591    }
592
593    pub fn tuples_byte_range(&self) -> Range<usize> {
594        let shared_tuple_count = self.shared_tuple_count();
595        let start = 0;
596        let end = start
597            + (transforms::to_usize(shared_tuple_count)).saturating_mul(
598                <Tuple as ComputeSize>::compute_size(self.axis_count()).unwrap_or(0),
599            );
600        start..end
601    }
602}
603
604#[allow(clippy::absurd_extreme_comparisons)]
605const _: () = assert!(FontData::default_data_long_enough(SharedTuples::MIN_SIZE));
606
607impl Default for SharedTuples<'_> {
608    fn default() -> Self {
609        Self {
610            data: FontData::default_table_data(),
611            shared_tuple_count: Default::default(),
612            axis_count: Default::default(),
613        }
614    }
615}
616
617#[cfg(feature = "experimental_traverse")]
618impl<'a> SomeTable<'a> for SharedTuples<'a> {
619    fn type_name(&self) -> &str {
620        "SharedTuples"
621    }
622    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
623        match idx {
624            0usize => Some(Field::new(
625                "tuples",
626                traversal::FieldType::computed_array("Tuple", self.tuples(), self.offset_data()),
627            )),
628            _ => None,
629        }
630    }
631}
632
633#[cfg(feature = "experimental_traverse")]
634#[allow(clippy::needless_lifetimes)]
635impl<'a> std::fmt::Debug for SharedTuples<'a> {
636    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
637        (self as &dyn SomeTable<'a>).fmt(f)
638    }
639}
640
641impl<'a> MinByteRange<'a> for GlyphVariationDataHeader<'a> {
642    fn min_byte_range(&self) -> Range<usize> {
643        0..self.tuple_variation_headers_byte_range().end
644    }
645    fn min_table_bytes(&self) -> &'a [u8] {
646        let range = self.min_byte_range();
647        self.data.as_bytes().get(range).unwrap_or_default()
648    }
649}
650
651impl ReadArgs for GlyphVariationDataHeader<'_> {
652    type Args = ();
653}
654
655impl<'a> FontRead<'a> for GlyphVariationDataHeader<'a> {
656    fn read_with_args(data: FontData<'a>, _: ()) -> Result<Self, ReadError> {
657        #[allow(clippy::absurd_extreme_comparisons)]
658        if data.len() < Self::MIN_SIZE {
659            return Err(ReadError::OutOfBounds);
660        }
661        Ok(Self { data })
662    }
663}
664
665/// The [GlyphVariationData](https://learn.microsoft.com/en-us/typography/opentype/spec/gvar#the-glyphvariationdata-table-array) table
666#[derive(Clone)]
667pub struct GlyphVariationDataHeader<'a> {
668    data: FontData<'a>,
669}
670
671#[allow(clippy::needless_lifetimes)]
672impl<'a> GlyphVariationDataHeader<'a> {
673    pub const MIN_SIZE: usize = (TupleVariationCount::RAW_BYTE_LEN + Offset16::RAW_BYTE_LEN);
674    basic_table_impls!(impl_the_methods);
675
676    /// A packed field. The high 4 bits are flags, and the low 12 bits
677    /// are the number of tuple variation tables for this glyph. The
678    /// number of tuple variation tables can be any number between 1
679    /// and 4095.
680    pub fn tuple_variation_count(&self) -> TupleVariationCount {
681        let range = self.tuple_variation_count_byte_range();
682        self.data.read_at(range.start).ok().unwrap()
683    }
684
685    /// Offset from the start of the GlyphVariationData table to the
686    /// serialized data
687    pub fn serialized_data_offset(&self) -> Offset16 {
688        let range = self.serialized_data_offset_byte_range();
689        self.data.read_at(range.start).ok().unwrap()
690    }
691
692    /// Attempt to resolve [`serialized_data_offset`][Self::serialized_data_offset].
693    pub fn serialized_data(&self) -> Result<FontData<'a>, ReadError> {
694        let data = self.data;
695        self.serialized_data_offset().resolve(data)
696    }
697
698    /// Array of tuple variation headers.
699    pub fn tuple_variation_headers(&self) -> VarLenArray<'a, TupleVariationHeader<'a>> {
700        let range = self.tuple_variation_headers_byte_range();
701        self.data
702            .split_off(range.start)
703            .and_then(|d| VarLenArray::read(d).ok())
704            .unwrap_or_default()
705    }
706
707    pub fn tuple_variation_count_byte_range(&self) -> Range<usize> {
708        let start = 0;
709        let end = start + TupleVariationCount::RAW_BYTE_LEN;
710        start..end
711    }
712
713    pub fn serialized_data_offset_byte_range(&self) -> Range<usize> {
714        let start = self.tuple_variation_count_byte_range().end;
715        let end = start + Offset16::RAW_BYTE_LEN;
716        start..end
717    }
718
719    pub fn tuple_variation_headers_byte_range(&self) -> Range<usize> {
720        let start = self.serialized_data_offset_byte_range().end;
721        let end = start + self.data.len().saturating_sub(start);
722        start..end
723    }
724}
725
726const _: () = assert!(FontData::default_data_long_enough(
727    GlyphVariationDataHeader::MIN_SIZE
728));
729
730impl Default for GlyphVariationDataHeader<'_> {
731    fn default() -> Self {
732        Self {
733            data: FontData::default_table_data(),
734        }
735    }
736}
737
738#[cfg(feature = "experimental_traverse")]
739impl<'a> SomeTable<'a> for GlyphVariationDataHeader<'a> {
740    fn type_name(&self) -> &str {
741        "GlyphVariationDataHeader"
742    }
743    fn get_field(&self, idx: usize) -> Option<Field<'a>> {
744        match idx {
745            0usize => Some(Field::new(
746                "tuple_variation_count",
747                traversal::FieldType::Unknown,
748            )),
749            1usize => Some(Field::new(
750                "serialized_data_offset",
751                traversal::FieldType::Unknown,
752            )),
753            2usize => Some(Field::new(
754                "tuple_variation_headers",
755                traversal::FieldType::Unknown,
756            )),
757            _ => None,
758        }
759    }
760}
761
762#[cfg(feature = "experimental_traverse")]
763#[allow(clippy::needless_lifetimes)]
764impl<'a> std::fmt::Debug for GlyphVariationDataHeader<'a> {
765    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
766        (self as &dyn SomeTable<'a>).fmt(f)
767    }
768}
read_fonts/generated/generated_gvar.rs

read_fonts/generated/
generated_gvar.rs
