Enum wayland_client::protocol::wl_shm_pool::Request

#[non_exhaustive]
pub enum Request {
    CreateBuffer {
        offset: i32,
        width: i32,
        height: i32,
        stride: i32,
        format: Format,
    },
    Destroy,
    Resize {
        size: i32,
    },
}

Variants (Non-exhaustive)

[+] This enum is marked as 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.

CreateBuffer

[−] Expand description

create a buffer from the pool

Create a wl_buffer object from the pool.

The buffer is created offset bytes into the pool and has width and height as specified. The stride argument specifies the number of bytes from the beginning of one row to the beginning of the next. The format is the pixel format of the buffer and must be one of those advertised through the wl_shm.format event.

A buffer will keep a reference to the pool it was created from so it is valid to destroy the pool immediately after creating a buffer from it.

[−] Show fields

Fields of CreateBuffer

offset: i32width: i32height: i32stride: i32format: Format

Destroy

[−] Expand description

destroy the pool

Destroy the shared memory pool.

The mmapped memory will be released when all buffers that have been created from this pool are gone.

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

Resize

[−] Expand description

change the size of the pool mapping

This request will cause the server to remap the backing memory for the pool from the file descriptor passed when the pool was created, but using the new size. This request can only be used to make the pool bigger.

[−] Show fields

Fields of Resize

size: i32

Trait Implementations

impl Debug for Request[+]

[+] Show hidden undocumented items

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

Formats the value using the given formatter.

impl MessageGroup for Request[+]

[+] Show hidden undocumented items

const MESSAGES: &'static [MessageDesc][−][−]

Wire representation of this MessageGroup

type Map = ProxyMap

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