Struct Metrics

pub struct Metrics {
    pub scale_x: f32,
    pub scale_y: f32,
    pub scale_z: f32,
}

Rendering target metrics associated with a node. See also MetricsEvent.

Fields

scale_x: f32

The ratio between the size of one logical pixel within the node’s local coordinate system and the size of one physical pixel of the rendering target.

This scale factors change in relation to the resolution of the rendering target and the scale transformations applied by containing nodes. They are always strictly positive and non-zero.

For example, suppose the rendering target is a high resolution display with a device pixel ratio of 2.0 meaning that each logical pixel within the model corresponds to two physical pixels of the display. Assuming no scale transformations affect the node, then its metrics event will report a scale factor of 2.0.

Building on this example, if instead the node’s parent applies a scale transformation of 0.25 to the node, then the node’s metrics event will report a scale factor of 0.5 indicating that the node should render its content at a reduced resolution and level of detail since a smaller area of physical pixels (half the size in each dimension) will be rendered.

scale_y: f32

scale_z: f32

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<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<D: ResourceDialect, T0: Encode<f32, D>, T1: Encode<f32, D>, T2: Encode<f32, D>> Encode<Metrics, D> for (T0, T1, T2)

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 PartialOrd for Metrics

fn partial_cmp(&self, other: &Metrics) -> 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 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 Copy for Metrics

impl Persistable for Metrics

impl StructuralPartialEq for Metrics