Struct png::Transformations

pub struct Transformations { /* fields omitted */ }

Output transformations

Only IDENTITY and TRANSFORM_EXPAND | TRANSFORM_STRIP_ALPHA can be used at the moment.

Methods

impl Transformations

pub const IDENTITY: Transformations

No transformation

pub const STRIP_16: Transformations

Strip 16-bit samples to 8 bits

pub const STRIP_ALPHA: Transformations

Discard the alpha channel

pub const PACKING: Transformations

Expand 1; 2 and 4-bit samples to bytes

pub const PACKSWAP: Transformations

Change order of packed pixels to LSB first

pub const EXPAND: Transformations

Expand paletted images to RGB; expand grayscale images of less than 8-bit depth to 8-bit depth; and expand tRNS chunks to alpha channels.

pub const INVERT_MONO: Transformations

Invert monochrome images

pub const SHIFT: Transformations

Normalize pixels to the sBIT depth

pub const BGR: Transformations

Flip RGB to BGR; RGBA to BGRA

pub const SWAP_ALPHA: Transformations

Flip RGBA to ARGB or GA to AG

pub const SWAP_ENDIAN: Transformations

Byte-swap 16-bit samples

pub const INVERT_ALPHA: Transformations

Change alpha from opacity to transparency

pub const STRIP_FILLER: Transformations

pub const STRIP_FILLER_BEFORE: Transformations

pub const STRIP_FILLER_AFTER: Transformations

pub const GRAY_TO_RGB: Transformations

pub const EXPAND_16: Transformations

pub const SCALE_16: Transformations

pub const fn empty() -> Transformations

Returns an empty set of flags

pub const fn all() -> Transformations

Returns the set containing all flags.

pub const fn bits(&self) -> u32

Returns the raw value of the flags currently stored.

pub fn from_bits(bits: u32) -> Option<Transformations>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: u32) -> Transformations

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

pub const fn intersects(&self, other: Transformations) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: Transformations) -> bool

Returns true all of the flags in other are contained within self.

pub fn insert(&mut self, other: Transformations)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: Transformations)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: Transformations)

Toggles the specified flags in-place.

pub fn set(&mut self, other: Transformations, value: bool)

Inserts or removes the specified flags depending on the passed value.

Trait Implementations

impl<R: Read> Parameter<Decoder<R>> for Transformations

fn set_param(self, this: &mut Decoder<R>)

impl Copy for Transformations

impl Eq for Transformations

impl Clone for Transformations

fn clone(&self) -> Transformations

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialOrd<Transformations> for Transformations

fn partial_cmp(&self, other: &Transformations) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Transformations) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Transformations) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Transformations) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Transformations) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Extend<Transformations> for Transformations

fn extend<T: IntoIterator<Item = Transformations>>(&mut self, iterator: T)

Extends a collection with the contents of an iterator.

impl PartialEq<Transformations> for Transformations

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

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

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

This method tests for !=.

impl Ord for Transformations

fn cmp(&self, other: &Transformations) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

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

Restrict a value to a certain interval.

impl Hash for Transformations

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl Debug for Transformations

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

Formats the value using the given formatter.

impl Sub<Transformations> for Transformations

type Output = Transformations

The resulting type after applying the - operator.

fn sub(self, other: Transformations) -> Transformations

Returns the set difference of the two sets of flags.

impl SubAssign<Transformations> for Transformations

fn sub_assign(&mut self, other: Transformations)

Disables all flags enabled in the set.

impl Not for Transformations

type Output = Transformations

The resulting type after applying the ! operator.

fn not(self) -> Transformations

Returns the complement of this set of flags.

impl BitAnd<Transformations> for Transformations

type Output = Transformations

The resulting type after applying the & operator.

fn bitand(self, other: Transformations) -> Transformations

Returns the intersection between the two sets of flags.

impl BitOr<Transformations> for Transformations

type Output = Transformations

The resulting type after applying the | operator.

fn bitor(self, other: Transformations) -> Transformations

Returns the union of the two sets of flags.

impl BitXor<Transformations> for Transformations

type Output = Transformations

The resulting type after applying the ^ operator.

fn bitxor(self, other: Transformations) -> Transformations

Returns the left flags, but with all the right flags toggled.

impl BitAndAssign<Transformations> for Transformations

fn bitand_assign(&mut self, other: Transformations)

Disables all flags disabled in the set.

impl BitOrAssign<Transformations> for Transformations

fn bitor_assign(&mut self, other: Transformations)

Adds the set of flags.

impl BitXorAssign<Transformations> for Transformations

fn bitxor_assign(&mut self, other: Transformations)

Toggles the set of flags.

impl FromIterator<Transformations> for Transformations

fn from_iter<T: IntoIterator<Item = Transformations>>(
    iterator: T
) -> Transformations

Creates a value from an iterator.

impl Octal for Transformations

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

Formats the value using the given formatter.

impl Binary for Transformations

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

Formats the value using the given formatter.

impl LowerHex for Transformations

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

Formats the value using the given formatter.

impl UpperHex for Transformations

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

Formats the value using the given formatter.