Struct image::codecs::jpeg::PixelDensity

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pub struct PixelDensity {
    pub density: (u16, u16),
    pub unit: PixelDensityUnit,
}

Expand description

Represents the pixel density of an image

For example, a 300 DPI image is represented by:

use image::codecs::jpeg::*;
let hdpi = PixelDensity::dpi(300);
assert_eq!(hdpi, PixelDensity {density: (300,300), unit: PixelDensityUnit::Inches})

Fields

density: (u16, u16)

A couple of values for (Xdensity, Ydensity)

unit: PixelDensityUnit

The unit in which the density is measured

Implementations

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impl PixelDensity

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pub fn dpi(density: u16) -> Self

Creates the most common pixel density type: the horizontal and the vertical density are equal, and measured in pixels per inch.

Trait Implementations

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impl Clone for PixelDensity

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fn clone(&self) -> PixelDensity

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for PixelDensity

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

Formats the value using the given formatter. Read more

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impl Default for PixelDensity

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fn default() -> Self

Returns a pixel density with a pixel aspect ratio of 1

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impl PartialEq<PixelDensity> for PixelDensity

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

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

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

This method tests for !=.

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impl StructuralPartialEq for PixelDensity

Auto Trait Implementations

impl RefUnwindSafe for PixelDensity

impl Send for PixelDensity

impl Sync for PixelDensity

impl Unpin for PixelDensity

impl UnwindSafe for PixelDensity

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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impl<R, P> ReadPrimitive<R> for P where
R: Read + ReadEndian,
P: Default,

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fn read_from_little_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_little_endian().

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fn read_from_big_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_big_endian().

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fn read_from_native_endian(read: &mut R) -> Result<Self, Error>

Read this value from the supplied reader. Same as ReadEndian::read_from_native_endian().

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct image::codecs::jpeg::PixelDensity

Fields

Implementations

impl PixelDensity

pub fn dpi(density: u16) -> Self

Trait Implementations

impl Clone for PixelDensity

fn clone(&self) -> PixelDensity

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

impl Debug for PixelDensity

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

impl Default for PixelDensity

fn default() -> Self

impl PartialEq<PixelDensity> for PixelDensity

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

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

impl Copy for PixelDensity

impl Eq for PixelDensity

impl StructuralEq for PixelDensity

impl StructuralPartialEq for PixelDensity

Auto Trait Implementations

impl RefUnwindSafe for PixelDensity

impl Send for PixelDensity

impl Sync for PixelDensity

impl Unpin for PixelDensity

impl UnwindSafe for PixelDensity

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::()

type Init = T

unsafe fn init(init: <T as Pointable>::Init) -> usize

unsafe fn deref<'a>(ptr: usize) -> &'a T

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

unsafe fn drop(ptr: usize)

impl<R, P> ReadPrimitive<R> for P where R: Read + ReadEndian<P>, P: Default,

fn read_from_little_endian(read: &mut R) -> Result<Self, Error>

fn read_from_big_endian(read: &mut R) -> Result<Self, Error>

fn read_from_native_endian(read: &mut R) -> Result<Self, Error>

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<R, P> ReadPrimitive<R> for P where
R: Read + ReadEndian<P>,
P: Default,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,