Struct ImageDescriptorFlags

pub struct ImageDescriptorFlags {
    pub is_opaque: bool,
    pub allow_mipmaps: bool,
}

Various flags that are part of an image descriptor.

Fields

is_opaque: bool

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

allow_mipmaps: bool

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/

Trait Implementations

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 Debug for ImageDescriptorFlags

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

Formats the value using the given formatter.

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

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

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ImageDescriptorFlags

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd 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: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Copy for ImageDescriptorFlags

impl Eq for ImageDescriptorFlags

impl StructuralPartialEq for ImageDescriptorFlags