Struct webrender_api::ImageDescriptorFlags

pub struct ImageDescriptorFlags { /* fields omitted */ }

Various flags that are part of an image descriptor.

Methods

impl ImageDescriptorFlags

pub const IS_OPAQUE: ImageDescriptorFlags

Whether this image is opaque, or has an alpha channel. Avoiding blending for opaque surfaces is an important optimization.

pub const ALLOW_MIPMAPS: ImageDescriptorFlags

Whether to allow the driver to automatically generate mipmaps. If images are already downscaled appropriately, mipmap generation can be wasted work, and cause performance problems on some cards/drivers.

See https://github.com/servo/webrender/pull/2555/

pub const PREFER_COMPOSITOR_SURFACE: ImageDescriptorFlags

This is used as a performance hint - this image may be promoted to a native compositor surface under certain (implementation specific) conditions. This is typically used for large videos, and canvas elements.

pub const fn empty() -> ImageDescriptorFlags

Returns an empty set of flags

pub const fn all() -> ImageDescriptorFlags

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<ImageDescriptorFlags>

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) -> ImageDescriptorFlags

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

pub const unsafe fn from_bits_unchecked(bits: u32) -> ImageDescriptorFlags

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

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: ImageDescriptorFlags) -> bool

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

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

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

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

Inserts the specified flags in-place.

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

Removes the specified flags in-place.

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

Toggles the specified flags in-place.

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

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

Trait Implementations

impl Binary for ImageDescriptorFlags

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

Formats the value using the given formatter.

impl BitAnd<ImageDescriptorFlags> for ImageDescriptorFlags

type Output = ImageDescriptorFlags

The resulting type after applying the & operator.

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

Returns the intersection between the two sets of flags.

impl BitAndAssign<ImageDescriptorFlags> for ImageDescriptorFlags

fn bitand_assign(&mut self, other: ImageDescriptorFlags)

Disables all flags disabled in the set.

impl BitOr<ImageDescriptorFlags> for ImageDescriptorFlags

type Output = ImageDescriptorFlags

The resulting type after applying the | operator.

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

Returns the union of the two sets of flags.

impl BitOrAssign<ImageDescriptorFlags> for ImageDescriptorFlags

fn bitor_assign(&mut self, other: ImageDescriptorFlags)

Adds the set of flags.

impl BitXor<ImageDescriptorFlags> for ImageDescriptorFlags

type Output = ImageDescriptorFlags

The resulting type after applying the ^ operator.

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

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

impl BitXorAssign<ImageDescriptorFlags> for ImageDescriptorFlags

fn bitxor_assign(&mut self, other: ImageDescriptorFlags)

Toggles the set of flags.

impl Clone for ImageDescriptorFlags

fn clone(&self) -> ImageDescriptorFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ImageDescriptorFlags

impl Debug for ImageDescriptorFlags

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ImageDescriptorFlags

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Eq for ImageDescriptorFlags

impl Extend<ImageDescriptorFlags> for ImageDescriptorFlags

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

Extends a collection with the contents of an iterator.

impl FromIterator<ImageDescriptorFlags> for ImageDescriptorFlags

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

Creates a value from an iterator.

impl Hash for ImageDescriptorFlags

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 LowerHex for ImageDescriptorFlags

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

Formats the value using the given formatter.

impl Not for ImageDescriptorFlags

type Output = ImageDescriptorFlags

The resulting type after applying the ! operator.

fn not(self) -> ImageDescriptorFlags

Returns the complement of this set of flags.

impl Octal for ImageDescriptorFlags

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

Formats the value using the given formatter.

impl Ord for ImageDescriptorFlags

fn cmp(&self, other: &ImageDescriptorFlags) -> 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 PartialEq<ImageDescriptorFlags> for ImageDescriptorFlags

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

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

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

This method tests for !=.

impl PartialOrd<ImageDescriptorFlags> for ImageDescriptorFlags

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

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

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

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

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

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

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

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

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

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

impl Serialize for ImageDescriptorFlags

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl StructuralEq for ImageDescriptorFlags

impl StructuralPartialEq for ImageDescriptorFlags

impl Sub<ImageDescriptorFlags> for ImageDescriptorFlags

type Output = ImageDescriptorFlags

The resulting type after applying the - operator.

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

Returns the set difference of the two sets of flags.

impl SubAssign<ImageDescriptorFlags> for ImageDescriptorFlags

fn sub_assign(&mut self, other: ImageDescriptorFlags)

Disables all flags enabled in the set.

impl UpperHex for ImageDescriptorFlags

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

Formats the value using the given formatter.