Enum zng::render::ImageRendering

#[repr(u8)]
pub enum ImageRendering {
    Auto = 0,
    CrispEdges = 1,
    Pixelated = 2,
}

Image scaling algorithm in the renderer.

If an image is not rendered at the same size as their source it must be up-scaled or down-scaled. The algorithms used for this scaling can be selected using this enum.

Note that the algorithms used in the renderer value performance over quality and do a good enough job for small or temporary changes in scale only, such as a small size correction or a scaling animation. If and image is constantly rendered at a different scale you should considered scaling it on the CPU using a slower but more complex algorithm or pre-scaling it before including in the app.

Variants

Auto = 0

Let the renderer select the algorithm, currently this is the same as CrispEdges.

CrispEdges = 1

The image is scaled with an algorithm that preserves contrast and edges in the image, and which does not smooth colors or introduce blur to the image in the process.

Currently the Bilinear interpolation algorithm is used.

Pixelated = 2

When scaling the image up, the image appears to be composed of large pixels.

Currently the Nearest-neighbor interpolation algorithm is used.

Trait Implementations

impl Clone for ImageRendering

fn clone(&self) -> ImageRendering

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ImageRendering

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ImageRendering

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ImageRendering

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

where __H: Hasher,

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 PartialEq for ImageRendering

fn eq(&self, other: &ImageRendering) -> 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 PxToWr for ImageRendering

type AsDevice = ()

Self equivalent in webrender::units::DevicePixel units.

type AsWorld = ()

Self equivalent in `webrender::units::WorldPixel units.

type AsLayout = ImageRendering

Self equivalent in webrender::units::LayoutPixel units.

fn to_wr_device(self) -> <ImageRendering as PxToWr>::AsDevice

Returns self in webrender::units::DevicePixel units.

fn to_wr_world(self) -> <ImageRendering as PxToWr>::AsWorld

Returns self in webrender::units::WorldPixel units.

fn to_wr(self) -> <ImageRendering as PxToWr>::AsLayout

Returns self in webrender::units::LayoutPixel units.

impl Serialize for ImageRendering

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ImageRendering

impl Eq for ImageRendering

impl StructuralPartialEq for ImageRendering