Enum servo_geometry::DeviceIndependentPixel

pub enum DeviceIndependentPixel {}

A normalized “pixel” at the default resolution for the display.

Like the CSS “px” unit, the exact physical size of this unit may vary between devices, but it should approximate a device-independent reference length. This unit corresponds to Android’s “density-independent pixel” (dip), Mac OS X’s “point”, and Windows “device-independent pixel.”

The relationship between DevicePixel and DeviceIndependentPixel is defined by the OS. On most low-dpi screens, one DeviceIndependentPixel is equal to one DevicePixel. But on high-density screens it can be some larger number. For example, by default on Apple “retina” displays, one DeviceIndependentPixel equals two DevicePixels. On Android “MDPI” displays, one DeviceIndependentPixel equals 1.5 device pixels.

The ratio between DeviceIndependentPixel and DevicePixel for a given display be found by calling servo::windowing::WindowMethods::hidpi_factor.

Trait Implementations

impl Clone for DeviceIndependentPixel

fn clone(&self) -> DeviceIndependentPixel

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DeviceIndependentPixel

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

Formats the value using the given formatter.

impl MallocSizeOf for DeviceIndependentPixel

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl Copy for DeviceIndependentPixel