Struct bdf::Bitmap

pub struct Bitmap { /* fields omitted */ }

The bitmap of a glyph.

Implementations

impl Bitmap

pub fn new(width: u32, height: u32) -> Self

Creates a bitmap of the given size.

pub fn width(&self) -> u32

Gets the width.

pub fn height(&self) -> u32

Gets the height.

pub fn get(&self, x: u32, y: u32) -> bool

Gets a bit from the map.

pub fn set(&mut self, x: u32, y: u32, value: bool)

Sets a bit of the map.

Methods from Deref<Target = BitSet>

pub fn capacity(&self) -> usize

Returns the capacity in bits for this bit vector. Inserting any element less than this amount will not trigger a resizing.

Examples

use bit_set::BitSet;

let mut s = BitSet::with_capacity(100);
assert!(s.capacity() >= 100);

pub fn reserve_len(&mut self, len: usize)

Reserves capacity for the given BitSet to contain len distinct elements. In the case of BitSet this means reallocations will not occur as long as all inserted elements are less than len.

The collection may reserve more space to avoid frequent reallocations.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.reserve_len(10);
assert!(s.capacity() >= 10);

pub fn reserve_len_exact(&mut self, len: usize)

Reserves the minimum capacity for the given BitSet to contain len distinct elements. In the case of BitSet this means reallocations will not occur as long as all inserted elements are less than len.

Note that the allocator may give the collection more space than it requests. Therefore capacity can not be relied upon to be precisely minimal. Prefer reserve_len if future insertions are expected.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.reserve_len_exact(10);
assert!(s.capacity() >= 10);

pub fn get_ref(&self) -> &BitVec<B>

Returns a reference to the underlying bit vector.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.insert(0);

let bv = s.get_ref();
assert_eq!(bv[0], true);

pub fn shrink_to_fit(&mut self)

Truncates the underlying vector to the least length required.

Examples

use bit_set::BitSet;

let mut s = BitSet::new();
s.insert(32183231);
s.remove(32183231);

// Internal storage will probably be bigger than necessary
println!("old capacity: {}", s.capacity());

// Now should be smaller
s.shrink_to_fit();
println!("new capacity: {}", s.capacity());

pub fn iter(&self) -> Iter<B>

Iterator over each usize stored in the BitSet.

Examples

use bit_set::BitSet;

let s = BitSet::from_bytes(&[0b01001010]);

// Print 1, 4, 6 in arbitrary order
for x in s.iter() {
    println!("{}", x);
}

pub fn union(&'a self, other: &'a BitSet<B>) -> Union<'a, B>

Iterator over each usize stored in self union other. See union_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 0, 1, 2, 4 in arbitrary order
for x in a.union(&b) {
    println!("{}", x);
}

pub fn intersection(&'a self, other: &'a BitSet<B>) -> Intersection<'a, B>

Iterator over each usize stored in self intersect other. See intersect_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 2
for x in a.intersection(&b) {
    println!("{}", x);
}

pub fn difference(&'a self, other: &'a BitSet<B>) -> Difference<'a, B>

Iterator over each usize stored in the self setminus other. See difference_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 1, 4 in arbitrary order
for x in a.difference(&b) {
    println!("{}", x);
}

// Note that difference is not symmetric,
// and `b - a` means something else.
// This prints 0
for x in b.difference(&a) {
    println!("{}", x);
}

pub fn symmetric_difference(
    &'a self,
    other: &'a BitSet<B>
) -> SymmetricDifference<'a, B>

Iterator over each usize stored in the symmetric difference of self and other. See symmetric_difference_with for an efficient in-place version.

Examples

use bit_set::BitSet;

let a = BitSet::from_bytes(&[0b01101000]);
let b = BitSet::from_bytes(&[0b10100000]);

// Print 0, 1, 4 in arbitrary order
for x in a.symmetric_difference(&b) {
    println!("{}", x);
}

pub fn union_with(&mut self, other: &BitSet<B>)

Unions in-place with the specified other bit vector.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let res = 0b11101000;

let mut a = BitSet::from_bytes(&[a]);
let b = BitSet::from_bytes(&[b]);
let res = BitSet::from_bytes(&[res]);

a.union_with(&b);
assert_eq!(a, res);

pub fn intersect_with(&mut self, other: &BitSet<B>)

Intersects in-place with the specified other bit vector.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let res = 0b00100000;

let mut a = BitSet::from_bytes(&[a]);
let b = BitSet::from_bytes(&[b]);
let res = BitSet::from_bytes(&[res]);

a.intersect_with(&b);
assert_eq!(a, res);

pub fn difference_with(&mut self, other: &BitSet<B>)

Makes this bit vector the difference with the specified other bit vector in-place.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let a_b = 0b01001000; // a - b
let b_a = 0b10000000; // b - a

let mut bva = BitSet::from_bytes(&[a]);
let bvb = BitSet::from_bytes(&[b]);
let bva_b = BitSet::from_bytes(&[a_b]);
let bvb_a = BitSet::from_bytes(&[b_a]);

bva.difference_with(&bvb);
assert_eq!(bva, bva_b);

let bva = BitSet::from_bytes(&[a]);
let mut bvb = BitSet::from_bytes(&[b]);

bvb.difference_with(&bva);
assert_eq!(bvb, bvb_a);

pub fn symmetric_difference_with(&mut self, other: &BitSet<B>)

Makes this bit vector the symmetric difference with the specified other bit vector in-place.

Examples

use bit_set::BitSet;

let a   = 0b01101000;
let b   = 0b10100000;
let res = 0b11001000;

let mut a = BitSet::from_bytes(&[a]);
let b = BitSet::from_bytes(&[b]);
let res = BitSet::from_bytes(&[res]);

a.symmetric_difference_with(&b);
assert_eq!(a, res);

pub fn len(&self) -> usize

Returns the number of set bits in this set.

pub fn is_empty(&self) -> bool

Returns whether there are no bits set in this set

pub fn clear(&mut self)

Clears all bits in this set

pub fn contains(&self, value: usize) -> bool

Returns true if this set contains the specified integer.

pub fn is_disjoint(&self, other: &BitSet<B>) -> bool

Returns true if the set has no elements in common with other. This is equivalent to checking for an empty intersection.

pub fn is_subset(&self, other: &BitSet<B>) -> bool

Returns true if the set is a subset of another.

pub fn is_superset(&self, other: &BitSet<B>) -> bool

Returns true if the set is a superset of another.

pub fn insert(&mut self, value: usize) -> bool

Adds a value to the set. Returns true if the value was not already present in the set.

pub fn remove(&mut self, value: usize) -> bool

Removes a value from the set. Returns true if the value was present in the set.

Trait Implementations

impl Clone for Bitmap

fn clone(&self) -> Bitmap

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Bitmap

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Default for Bitmap

fn default() -> Self

Returns the "default value" for a type.

impl Deref for Bitmap

type Target = BitSet

The resulting type after dereferencing.

fn deref(&self) -> &BitSet

Dereferences the value.

impl DerefMut for Bitmap

fn deref_mut(&mut self) -> &mut BitSet

Mutably dereferences the value.

impl Eq for Bitmap

impl PartialEq<Bitmap> for Bitmap

fn eq(&self, other: &Bitmap) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Bitmap) -> bool

This method tests for !=.

impl StructuralEq for Bitmap

impl StructuralPartialEq for Bitmap