Enum wayland_protocols::wlr::unstable::screencopy::v1::client::zwlr_screencopy_frame_v1::Event

#[non_exhaustive]
pub enum Event {
    Buffer {
        format: Format,
        width: u32,
        height: u32,
        stride: u32,
    },
    Flags {
        flags: Flags,
    },
    Ready {
        tv_sec_hi: u32,
        tv_sec_lo: u32,
        tv_nsec: u32,
    },
    Failed,
    Damage {
        x: u32,
        y: u32,
        width: u32,
        height: u32,
    },
    LinuxDmabuf {
        format: u32,
        width: u32,
        height: u32,
    },
    BufferDone,
}

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.

Buffer

Fields

format: Format

width: u32

height: u32

stride: u32

wl_shm buffer information

Provides information about wl_shm buffer parameters that need to be used for this frame. This event is sent once after the frame is created if wl_shm buffers are supported.

Flags

Fields

flags: Flags

frame flags

Provides flags about the frame. This event is sent once before the “ready” event.

Ready

Fields

tv_sec_hi: u32

tv_sec_lo: u32

tv_nsec: u32

indicates frame is available for reading

Called as soon as the frame is copied, indicating it is available for reading. This event includes the time at which presentation happened at.

The timestamp is expressed as tv_sec_hi, tv_sec_lo, tv_nsec triples, each component being an unsigned 32-bit value. Whole seconds are in tv_sec which is a 64-bit value combined from tv_sec_hi and tv_sec_lo, and the additional fractional part in tv_nsec as nanoseconds. Hence, for valid timestamps tv_nsec must be in [0, 999999999]. The seconds part may have an arbitrary offset at start.

After receiving this event, the client should destroy the object.

Failed

frame copy failed

This event indicates that the attempted frame copy has failed.

After receiving this event, the client should destroy the object.

Damage

Fields

x: u32

y: u32

width: u32

height: u32

carries the coordinates of the damaged region

This event is sent right before the ready event when copy_with_damage is requested. It may be generated multiple times for each copy_with_damage request.

The arguments describe a box around an area that has changed since the last copy request that was derived from the current screencopy manager instance.

The union of all regions received between the call to copy_with_damage and a ready event is the total damage since the prior ready event.

Only available since version 2 of the interface

LinuxDmabuf

Fields

format: u32

width: u32

height: u32

linux-dmabuf buffer information

Provides information about linux-dmabuf buffer parameters that need to be used for this frame. This event is sent once after the frame is created if linux-dmabuf buffers are supported.

Only available since version 3 of the interface

BufferDone

all buffer types reported

This event is sent once after all buffer events have been sent.

The client should proceed to create a buffer of one of the supported types, and send a “copy” request.

Only available since version 3 of the interface

Trait Implementations

impl Debug for Event

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

Formats the value using the given formatter.

impl MessageGroup for Event

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<Event, ()>

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