Enum wayland_protocols::viewporter::server::wp_viewport::Request

#[non_exhaustive]
pub enum Request {
    Destroy,
    SetSource {
        x: f64,
        y: f64,
        width: f64,
        height: f64,
    },
    SetDestination {
        width: i32,
        height: i32,
    },
}

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

remove scaling and cropping from the surface

The associated wl_surface’s crop and scale state is removed. The change is applied on the next wl_surface.commit.

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

SetSource

Fields

x: f64

y: f64

width: f64

height: f64

set the source rectangle for cropping

Set the source rectangle of the associated wl_surface. See wp_viewport for the description, and relation to the wl_buffer size.

If all of x, y, width and height are -1.0, the source rectangle is unset instead. Any other set of values where width or height are zero or negative, or x or y are negative, raise the bad_value protocol error.

The crop and scale state is double-buffered state, and will be applied on the next wl_surface.commit.

SetDestination

Fields

width: i32

height: i32

set the surface size for scaling

Set the destination size of the associated wl_surface. See wp_viewport for the description, and relation to the wl_buffer size.

If width is -1 and height is -1, the destination size is unset instead. Any other pair of values for width and height that contains zero or negative values raises the bad_value protocol error.

The crop and scale state is double-buffered state, and will be applied on the next wl_surface.commit.

Trait Implementations

impl Debug for Request

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

Formats the value using the given formatter.

impl MessageGroup for Request

const MESSAGES: &'static [MessageDesc] = _

Wire representation of this MessageGroup

type Map = ResourceMap

The wrapper type for ObjectMap allowing the mapping of Object and NewId arguments to the object map during parsing.

fn is_destructor(&self) -> bool

Whether this message is a destructor

fn opcode(&self) -> u16

The opcode of this message

fn since(&self) -> u32

The minimal object version for which this message exists

fn child<Meta: ObjectMetadata>(
    opcode: u16,
    version: u32,
    meta: &Meta
) -> Option<Object<Meta>>

Retrieve the child Object associated with this message if any

fn from_raw(msg: Message, map: &mut Self::Map) -> Result<Self, ()>

Construct a message from its raw representation

fn into_raw(self, sender_id: u32) -> Message

Turn this message into its raw representation

unsafe fn from_raw_c(
    obj: *mut c_void,
    opcode: u32,
    args: *const wl_argument
) -> Result<Request, ()>

Construct a message of this group from its C representation

fn as_raw_c_in<F, T>(self, f: F) -> T where
    F: FnOnce(u32, &mut [wl_argument]) -> T, 

Build a C representation of this message