Struct Metrics

pub struct Metrics {
    pub extent_in_px: Option<SizeU>,
    pub extent_in_mm: Option<SizeU>,
    pub recommended_device_pixel_ratio: Option<VecF>,
    pub maximum_refresh_rate_in_millihertz: Option<u32>,
    /* private fields */
}

Describes the physical display, and how to map between physical and logical pixels.

Fields

extent_in_px: Option<SizeU>

Same meaning as horizontal_resolution and vertical_resolution in fuchsia.hardware.display.Mode. Given in physical pixels.

extent_in_mm: Option<SizeU>

Same meaning as horizontal_size_mm and vertical_size_mm in fuchsia.hardware.display.Info.

recommended_device_pixel_ratio: Option<VecF>

The number of physical pixels per “logical” pixel, for example as in fuchsia.ui.composition.LayoutInfo.logical_size. It provides an indication of the size of image buffers that should be allocated. This value would typically be used by a component near the root of the scene graph to set a scale for the rest of the scene beneath.

maximum_refresh_rate_in_millihertz: Option<u32>

The maximum mumber of images transmitted to the display in 1000 seconds. This is the display’s maximum vertical refresh rate, in millihertz (0.001 Hz).

Trait Implementations

impl Clone for Metrics

fn clone(&self) -> Metrics

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Metrics

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

Formats the value using the given formatter.

impl<D: ResourceDialect> Decode<Metrics, D> for Metrics

fn new_empty() -> Self

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, D>, offset: usize, depth: Depth, ) -> Result<()>

Decodes an object of type T from the decoder’s buffers into self.

impl Default for Metrics

fn default() -> Metrics

Returns the “default value” for a type.

impl<D: ResourceDialect> Encode<Metrics, D> for &Metrics

unsafe fn encode( self, encoder: &mut Encoder<'_, D>, offset: usize, depth: Depth, ) -> Result<()>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl PartialEq for Metrics

fn eq(&self, other: &Metrics) -> 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 TypeMarker for Metrics

type Owned = Metrics

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl ValueTypeMarker for Metrics

type Borrowed<'a> = &'a Metrics

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &Self::Owned. There are three cases:

fn borrow(value: &<Self as TypeMarker>::Owned) -> Self::Borrowed<'_>

Cheaply converts from &Self::Owned to Self::Borrowed.

impl Persistable for Metrics

impl StructuralPartialEq for Metrics