Enum Request

#[non_exhaustive]
pub enum Request<'a> {
    Destroy,
    SetMultiplier {
        factor: u32,
    },
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Destroy

destroy the alpha modifier object

This destroys the object, and is equivalent to set_multiplier with a value of UINT32_MAX, with the same double-buffered semantics as set_multiplier.

This is a destructor, once sent this object cannot be used any longer.

SetMultiplier

specify the alpha multiplier

Sets the alpha multiplier for the surface. The alpha multiplier is double-buffered state, see wl_surface.commit for details.

This factor is applied in the compositor’s blending space, as an additional step after the processing of per-pixel alpha values for the wl_surface. The exact meaning of the factor is thus undefined, unless the blending space is specified in a different extension.

This multiplier is applied even if the buffer attached to the wl_surface doesn’t have an alpha channel; in that case an alpha value of one is used instead.

Zero means completely transparent, UINT32_MAX means completely opaque.

Fields

factor: u32

Implementations

impl<'a> Request<'a>

pub fn opcode(&self) -> u16

Get the opcode number of this message

Trait Implementations

impl<'a> Debug for Request<'a>

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

Formats the value using the given formatter.