zwp_linux_dmabuf_v1_client_protocol/

zwp_linux_dmabuf_v1_client_protocol.rs

// GENERATED FILE -- DO NOT EDIT
//
// Copyright © 2014, 2015 Collabora, Ltd.
// 
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice (including the next
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// Software.
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#![allow(warnings)]
#![allow(clippy::all)]
use anyhow;
#[allow(unused_imports)]
use fuchsia_wayland_core::{Array, Enum, Fixed, NewId, NewObject};
use fuchsia_wayland_core::{ArgKind, Arg, FromArgs, IntoMessage, Message,
                            MessageGroupSpec, MessageHeader, MessageSpec, MessageType,
                            ObjectId, EncodeError, DecodeError, Interface};

#[allow(unused_imports)]
use wayland_client_protocol::*;
pub mod zwp_linux_dmabuf_v1 {
use super::*;

/// factory for creating dmabuf-based wl_buffers
///
/// Following the interfaces from:
/// https://www.khronos.org/registry/egl/extensions/EXT/EGL_EXT_image_dma_buf_import.txt
/// and the Linux DRM sub-system's AddFb2 ioctl.
/// 
/// This interface offers ways to create generic dmabuf-based
/// wl_buffers. Immediately after a client binds to this interface,
/// the set of supported formats and format modifiers is sent with
/// 'format' and 'modifier' events.
/// 
/// The following are required from clients:
/// 
/// - Clients must ensure that either all data in the dma-buf is
/// coherent for all subsequent read access or that coherency is
/// correctly handled by the underlying kernel-side dma-buf
/// implementation.
/// 
/// - Don't make any more attachments after sending the buffer to the
/// compositor. Making more attachments later increases the risk of
/// the compositor not being able to use (re-import) an existing
/// dmabuf-based wl_buffer.
/// 
/// The underlying graphics stack must ensure the following:
/// 
/// - The dmabuf file descriptors relayed to the server will stay valid
/// for the whole lifetime of the wl_buffer. This means the server may
/// at any time use those fds to import the dmabuf into any kernel
/// sub-system that might accept it.
/// 
/// To create a wl_buffer from one or more dmabufs, a client creates a
/// zwp_linux_dmabuf_params_v1 object with a zwp_linux_dmabuf_v1.create_params
/// request. All planes required by the intended format are added with
/// the 'add' request. Finally, a 'create' or 'create_immed' request is
/// issued, which has the following outcome depending on the import success.
/// 
/// The 'create' request,
/// - on success, triggers a 'created' event which provides the final
/// wl_buffer to the client.
/// - on failure, triggers a 'failed' event to convey that the server
/// cannot use the dmabufs received from the client.
/// 
/// For the 'create_immed' request,
/// - on success, the server immediately imports the added dmabufs to
/// create a wl_buffer. No event is sent from the server in this case.
/// - on failure, the server can choose to either:
/// - terminate the client by raising a fatal error.
/// - mark the wl_buffer as failed, and send a 'failed' event to the
/// client. If the client uses a failed wl_buffer as an argument to any
/// request, the behaviour is compositor implementation-defined.
/// 
/// Warning! The protocol described in this file is experimental and
/// backward incompatible changes may be made. Backward compatible changes
/// may be added together with the corresponding interface version bump.
/// Backward incompatible changes are done by bumping the version number in
/// the protocol and interface names and resetting the interface version.
/// Once the protocol is to be declared stable, the 'z' prefix and the
/// version number in the protocol and interface names are removed and the
/// interface version number is reset.
#[derive(Debug)]
pub struct ZwpLinuxDmabufV1;

impl Interface for ZwpLinuxDmabufV1 {
    const NAME: &'static str = "zwp_linux_dmabuf_v1";
    const VERSION: u32 = 3;
    const REQUESTS: MessageGroupSpec = MessageGroupSpec(&[
        // destroy
        MessageSpec(&[
        ]),
        // create_params
        MessageSpec(&[
            ArgKind::NewId,
        ]),
    ]);
    const EVENTS: MessageGroupSpec = MessageGroupSpec(&[
        // format
        MessageSpec(&[
            ArgKind::Uint,
        ]),
        // modifier
        MessageSpec(&[
            ArgKind::Uint,
            ArgKind::Uint,
            ArgKind::Uint,
        ]),
    ]);
    type Incoming = Event;
    type Outgoing = Request;
}

#[derive(Debug)]
pub enum Request {

    /// unbind the factory
    ///
    /// Objects created through this interface, especially wl_buffers, will
    /// remain valid.
    Destroy,

    /// create a temporary object for buffer parameters
    ///
    /// This temporary object is used to collect multiple dmabuf handles into
    /// a single batch to create a wl_buffer. It can only be used once and
    /// should be destroyed after a 'created' or 'failed' event has been
    /// received.
    CreateParams {
        /// the new temporary
        params_id: NewId,
    },
}

impl MessageType for Request {
    fn log(&self, this: ObjectId) -> String {
        match *self {
            Request::Destroy {
            } => {
                format!("zwp_linux_dmabuf_v1@{:?}::destroy()", this)
            }
            Request::CreateParams {
                ref params_id,
            } => {
                format!("zwp_linux_dmabuf_v1@{:?}::create_params(params_id: {:?})", this, params_id)
            }
        }
    }
    fn message_name(&self) -> &'static std::ffi::CStr{
        match *self {
            Request::Destroy { .. } => c"zwp_linux_dmabuf_v1::destroy",
            Request::CreateParams { .. } => c"zwp_linux_dmabuf_v1::create_params",
        }
    }
}
#[derive(Debug)]
pub enum Event {

    /// supported buffer format
    ///
    /// This event advertises one buffer format that the server supports.
    /// All the supported formats are advertised once when the client
    /// binds to this interface. A roundtrip after binding guarantees
    /// that the client has received all supported formats.
    /// 
    /// For the definition of the format codes, see the
    /// zwp_linux_buffer_params_v1::create request.
    /// 
    /// Warning: the 'format' event is likely to be deprecated and replaced
    /// with the 'modifier' event introduced in zwp_linux_dmabuf_v1
    /// version 3, described below. Please refrain from using the information
    /// received from this event.
    Format {
        /// DRM_FORMAT code
        format: u32,
    },

    /// supported buffer format modifier
    ///
    /// This event advertises the formats that the server supports, along with
    /// the modifiers supported for each format. All the supported modifiers
    /// for all the supported formats are advertised once when the client
    /// binds to this interface. A roundtrip after binding guarantees that
    /// the client has received all supported format-modifier pairs.
    /// 
    /// For the definition of the format and modifier codes, see the
    /// zwp_linux_buffer_params_v1::create request.
    Modifier {
        /// DRM_FORMAT code
        format: u32,
        /// high 32 bits of layout modifier
        modifier_hi: u32,
        /// low 32 bits of layout modifier
        modifier_lo: u32,
    },
}

impl MessageType for Event {
    fn log(&self, this: ObjectId) -> String {
        match *self {
            Event::Format {
                ref format,
            } => {
                format!("zwp_linux_dmabuf_v1@{:?}::format(format: {:?})", this, format)
            }
            Event::Modifier {
                ref format,
                ref modifier_hi,
                ref modifier_lo,
            } => {
                format!("zwp_linux_dmabuf_v1@{:?}::modifier(format: {:?}, modifier_hi: {:?}, modifier_lo: {:?})", this, format, modifier_hi, modifier_lo)
            }
        }
    }
    fn message_name(&self) -> &'static std::ffi::CStr{
        match *self {
            Event::Format { .. } => c"zwp_linux_dmabuf_v1::format",
            Event::Modifier { .. } => c"zwp_linux_dmabuf_v1::modifier",
        }
    }
}
impl IntoMessage for Request {
    type Error = EncodeError;
    fn into_message(self, id: u32) -> Result<Message, <Self as IntoMessage>::Error> {
        let mut header = MessageHeader {
            sender: id,
            opcode: 0,
            length: 0,
        };
        let mut msg = Message::new();
        msg.write_header(&header)?;
        match self {
        Request::Destroy {
        } => {
            header.opcode = 0;
        },
        Request::CreateParams {
            params_id,
        } => {
            msg.write_arg(Arg::NewId(params_id))?;
            header.opcode = 1;
        },
        }
        header.length = msg.bytes().len() as u16;
        msg.rewind();
        msg.write_header(&header)?;
        Ok(msg)
    }
}
impl FromArgs for Event {
    fn from_args(op: u16, mut args: Vec<Arg>) -> Result<Self, anyhow::Error> {
        match op {
        0 /* format */ => {
            let mut iter = args.into_iter();
            Ok(Event::Format {
                format: iter.next()
                                             .ok_or(DecodeError::InsufficientArgs)?
                                             .as_uint()?,

            })
        },
        1 /* modifier */ => {
            let mut iter = args.into_iter();
            Ok(Event::Modifier {
                format: iter.next()
                                             .ok_or(DecodeError::InsufficientArgs)?
                                             .as_uint()?,
                modifier_hi: iter.next()
                                             .ok_or(DecodeError::InsufficientArgs)?
                                             .as_uint()?,
                modifier_lo: iter.next()
                                             .ok_or(DecodeError::InsufficientArgs)?
                                             .as_uint()?,

            })
        },
        _ => {
            Err(DecodeError::InvalidOpcode(op).into())
        },
        }
    }
}
} // mod zwp_linux_dmabuf_v1

pub use crate::zwp_linux_dmabuf_v1::ZwpLinuxDmabufV1;
pub use crate::zwp_linux_dmabuf_v1::Request as ZwpLinuxDmabufV1Request;
pub use crate::zwp_linux_dmabuf_v1::Event as ZwpLinuxDmabufV1Event;
pub mod zwp_linux_buffer_params_v1 {
use super::*;

/// parameters for creating a dmabuf-based wl_buffer
///
/// This temporary object is a collection of dmabufs and other
/// parameters that together form a single logical buffer. The temporary
/// object may eventually create one wl_buffer unless cancelled by
/// destroying it before requesting 'create'.
/// 
/// Single-planar formats only require one dmabuf, however
/// multi-planar formats may require more than one dmabuf. For all
/// formats, an 'add' request must be called once per plane (even if the
/// underlying dmabuf fd is identical).
/// 
/// You must use consecutive plane indices ('plane_idx' argument for 'add')
/// from zero to the number of planes used by the drm_fourcc format code.
/// All planes required by the format must be given exactly once, but can
/// be given in any order. Each plane index can be set only once.
#[derive(Debug)]
pub struct ZwpLinuxBufferParamsV1;

impl Interface for ZwpLinuxBufferParamsV1 {
    const NAME: &'static str = "zwp_linux_buffer_params_v1";
    const VERSION: u32 = 3;
    const REQUESTS: MessageGroupSpec = MessageGroupSpec(&[
        // destroy
        MessageSpec(&[
        ]),
        // add
        MessageSpec(&[
            ArgKind::Handle,
            ArgKind::Uint,
            ArgKind::Uint,
            ArgKind::Uint,
            ArgKind::Uint,
            ArgKind::Uint,
        ]),
        // create
        MessageSpec(&[
            ArgKind::Int,
            ArgKind::Int,
            ArgKind::Uint,
            ArgKind::Uint,
        ]),
        // create_immed
        MessageSpec(&[
            ArgKind::NewId,
            ArgKind::Int,
            ArgKind::Int,
            ArgKind::Uint,
            ArgKind::Uint,
        ]),
    ]);
    const EVENTS: MessageGroupSpec = MessageGroupSpec(&[
        // created
        MessageSpec(&[
            ArgKind::NewId,
        ]),
        // failed
        MessageSpec(&[
        ]),
    ]);
    type Incoming = Event;
    type Outgoing = Request;
}

#[derive(Debug)]
pub enum Request {

    /// delete this object, used or not
    ///
    /// Cleans up the temporary data sent to the server for dmabuf-based
    /// wl_buffer creation.
    Destroy,

    /// add a dmabuf to the temporary set
    ///
    /// This request adds one dmabuf to the set in this
    /// zwp_linux_buffer_params_v1.
    /// 
    /// The 64-bit unsigned value combined from modifier_hi and modifier_lo
    /// is the dmabuf layout modifier. DRM AddFB2 ioctl calls this the
    /// fb modifier, which is defined in drm_mode.h of Linux UAPI.
    /// This is an opaque token. Drivers use this token to express tiling,
    /// compression, etc. driver-specific modifications to the base format
    /// defined by the DRM fourcc code.
    /// 
    /// This request raises the PLANE_IDX error if plane_idx is too large.
    /// The error PLANE_SET is raised if attempting to set a plane that
    /// was already set.
    Add {
        /// dmabuf fd
        fd: zx::Handle,
        /// plane index
        plane_idx: u32,
        /// offset in bytes
        offset: u32,
        /// stride in bytes
        stride: u32,
        /// high 32 bits of layout modifier
        modifier_hi: u32,
        /// low 32 bits of layout modifier
        modifier_lo: u32,
    },

    /// create a wl_buffer from the given dmabufs
    ///
    /// This asks for creation of a wl_buffer from the added dmabuf
    /// buffers. The wl_buffer is not created immediately but returned via
    /// the 'created' event if the dmabuf sharing succeeds. The sharing
    /// may fail at runtime for reasons a client cannot predict, in
    /// which case the 'failed' event is triggered.
    /// 
    /// The 'format' argument is a DRM_FORMAT code, as defined by the
    /// libdrm's drm_fourcc.h. The Linux kernel's DRM sub-system is the
    /// authoritative source on how the format codes should work.
    /// 
    /// The 'flags' is a bitfield of the flags defined in enum "flags".
    /// 'y_invert' means the that the image needs to be y-flipped.
    /// 
    /// Flag 'interlaced' means that the frame in the buffer is not
    /// progressive as usual, but interlaced. An interlaced buffer as
    /// supported here must always contain both top and bottom fields.
    /// The top field always begins on the first pixel row. The temporal
    /// ordering between the two fields is top field first, unless
    /// 'bottom_first' is specified. It is undefined whether 'bottom_first'
    /// is ignored if 'interlaced' is not set.
    /// 
    /// This protocol does not convey any information about field rate,
    /// duration, or timing, other than the relative ordering between the
    /// two fields in one buffer. A compositor may have to estimate the
    /// intended field rate from the incoming buffer rate. It is undefined
    /// whether the time of receiving wl_surface.commit with a new buffer
    /// attached, applying the wl_surface state, wl_surface.frame callback
    /// trigger, presentation, or any other point in the compositor cycle
    /// is used to measure the frame or field times. There is no support
    /// for detecting missed or late frames/fields/buffers either, and
    /// there is no support whatsoever for cooperating with interlaced
    /// compositor output.
    /// 
    /// The composited image quality resulting from the use of interlaced
    /// buffers is explicitly undefined. A compositor may use elaborate
    /// hardware features or software to deinterlace and create progressive
    /// output frames from a sequence of interlaced input buffers, or it
    /// may produce substandard image quality. However, compositors that
    /// cannot guarantee reasonable image quality in all cases are recommended
    /// to just reject all interlaced buffers.
    /// 
    /// Any argument errors, including non-positive width or height,
    /// mismatch between the number of planes and the format, bad
    /// format, bad offset or stride, may be indicated by fatal protocol
    /// errors: INCOMPLETE, INVALID_FORMAT, INVALID_DIMENSIONS,
    /// OUT_OF_BOUNDS.
    /// 
    /// Dmabuf import errors in the server that are not obvious client
    /// bugs are returned via the 'failed' event as non-fatal. This
    /// allows attempting dmabuf sharing and falling back in the client
    /// if it fails.
    /// 
    /// This request can be sent only once in the object's lifetime, after
    /// which the only legal request is destroy. This object should be
    /// destroyed after issuing a 'create' request. Attempting to use this
    /// object after issuing 'create' raises ALREADY_USED protocol error.
    /// 
    /// It is not mandatory to issue 'create'. If a client wants to
    /// cancel the buffer creation, it can just destroy this object.
    Create {
        /// base plane width in pixels
        width: i32,
        /// base plane height in pixels
        height: i32,
        /// DRM_FORMAT code
        format: u32,
        /// see enum flags
        flags: u32,
    },

    /// immediately create a wl_buffer from the given
    /// dmabufs
    ///
    /// This asks for immediate creation of a wl_buffer by importing the
    /// added dmabufs.
    /// 
    /// In case of import success, no event is sent from the server, and the
    /// wl_buffer is ready to be used by the client.
    /// 
    /// Upon import failure, either of the following may happen, as seen fit
    /// by the implementation:
    /// - the client is terminated with one of the following fatal protocol
    /// errors:
    /// - INCOMPLETE, INVALID_FORMAT, INVALID_DIMENSIONS, OUT_OF_BOUNDS,
    /// in case of argument errors such as mismatch between the number
    /// of planes and the format, bad format, non-positive width or
    /// height, or bad offset or stride.
    /// - INVALID_WL_BUFFER, in case the cause for failure is unknown or
    /// plaform specific.
    /// - the server creates an invalid wl_buffer, marks it as failed and
    /// sends a 'failed' event to the client. The result of using this
    /// invalid wl_buffer as an argument in any request by the client is
    /// defined by the compositor implementation.
    /// 
    /// This takes the same arguments as a 'create' request, and obeys the
    /// same restrictions.
    CreateImmed {
        /// id for the newly created wl_buffer
        buffer_id: NewId,
        /// base plane width in pixels
        width: i32,
        /// base plane height in pixels
        height: i32,
        /// DRM_FORMAT code
        format: u32,
        /// see enum flags
        flags: u32,
    },
}

impl MessageType for Request {
    fn log(&self, this: ObjectId) -> String {
        match *self {
            Request::Destroy {
            } => {
                format!("zwp_linux_buffer_params_v1@{:?}::destroy()", this)
            }
            Request::Add {
                ref fd,
                ref plane_idx,
                ref offset,
                ref stride,
                ref modifier_hi,
                ref modifier_lo,
            } => {
                format!("zwp_linux_buffer_params_v1@{:?}::add(fd: <handle>, plane_idx: {:?}, offset: {:?}, stride: {:?}, modifier_hi: {:?}, modifier_lo: {:?})", this, plane_idx, offset, stride, modifier_hi, modifier_lo)
            }
            Request::Create {
                ref width,
                ref height,
                ref format,
                ref flags,
            } => {
                format!("zwp_linux_buffer_params_v1@{:?}::create(width: {:?}, height: {:?}, format: {:?}, flags: {:?})", this, width, height, format, flags)
            }
            Request::CreateImmed {
                ref buffer_id,
                ref width,
                ref height,
                ref format,
                ref flags,
            } => {
                format!("zwp_linux_buffer_params_v1@{:?}::create_immed(buffer_id: {:?}, width: {:?}, height: {:?}, format: {:?}, flags: {:?})", this, buffer_id, width, height, format, flags)
            }
        }
    }
    fn message_name(&self) -> &'static std::ffi::CStr{
        match *self {
            Request::Destroy { .. } => c"zwp_linux_buffer_params_v1::destroy",
            Request::Add { .. } => c"zwp_linux_buffer_params_v1::add",
            Request::Create { .. } => c"zwp_linux_buffer_params_v1::create",
            Request::CreateImmed { .. } => c"zwp_linux_buffer_params_v1::create_immed",
        }
    }
}
#[derive(Debug)]
pub enum Event {

    /// buffer creation succeeded
    ///
    /// This event indicates that the attempted buffer creation was
    /// successful. It provides the new wl_buffer referencing the dmabuf(s).
    /// 
    /// Upon receiving this event, the client should destroy the
    /// zlinux_dmabuf_params object.
    Created {
        /// the newly created wl_buffer
        buffer: NewObject<WlBuffer>,
    },

    /// buffer creation failed
    ///
    /// This event indicates that the attempted buffer creation has
    /// failed. It usually means that one of the dmabuf constraints
    /// has not been fulfilled.
    /// 
    /// Upon receiving this event, the client should destroy the
    /// zlinux_buffer_params object.
    Failed,
}

impl MessageType for Event {
    fn log(&self, this: ObjectId) -> String {
        match *self {
            Event::Created {
                ref buffer,
            } => {
                format!("zwp_linux_buffer_params_v1@{:?}::created(buffer: {:?})", this, buffer)
            }
            Event::Failed {
            } => {
                format!("zwp_linux_buffer_params_v1@{:?}::failed()", this)
            }
        }
    }
    fn message_name(&self) -> &'static std::ffi::CStr{
        match *self {
            Event::Created { .. } => c"zwp_linux_buffer_params_v1::created",
            Event::Failed { .. } => c"zwp_linux_buffer_params_v1::failed",
        }
    }
}
impl IntoMessage for Request {
    type Error = EncodeError;
    fn into_message(self, id: u32) -> Result<Message, <Self as IntoMessage>::Error> {
        let mut header = MessageHeader {
            sender: id,
            opcode: 0,
            length: 0,
        };
        let mut msg = Message::new();
        msg.write_header(&header)?;
        match self {
        Request::Destroy {
        } => {
            header.opcode = 0;
        },
        Request::Add {
            fd,
            plane_idx,
            offset,
            stride,
            modifier_hi,
            modifier_lo,
        } => {
            msg.write_arg(Arg::Handle(fd))?;
            msg.write_arg(Arg::Uint(plane_idx))?;
            msg.write_arg(Arg::Uint(offset))?;
            msg.write_arg(Arg::Uint(stride))?;
            msg.write_arg(Arg::Uint(modifier_hi))?;
            msg.write_arg(Arg::Uint(modifier_lo))?;
            header.opcode = 1;
        },
        Request::Create {
            width,
            height,
            format,
            flags,
        } => {
            msg.write_arg(Arg::Int(width))?;
            msg.write_arg(Arg::Int(height))?;
            msg.write_arg(Arg::Uint(format))?;
            msg.write_arg(Arg::Uint(flags))?;
            header.opcode = 2;
        },
        Request::CreateImmed {
            buffer_id,
            width,
            height,
            format,
            flags,
        } => {
            msg.write_arg(Arg::NewId(buffer_id))?;
            msg.write_arg(Arg::Int(width))?;
            msg.write_arg(Arg::Int(height))?;
            msg.write_arg(Arg::Uint(format))?;
            msg.write_arg(Arg::Uint(flags))?;
            header.opcode = 3;
        },
        }
        header.length = msg.bytes().len() as u16;
        msg.rewind();
        msg.write_header(&header)?;
        Ok(msg)
    }
}
impl FromArgs for Event {
    fn from_args(op: u16, mut args: Vec<Arg>) -> Result<Self, anyhow::Error> {
        match op {
        0 /* created */ => {
            let mut iter = args.into_iter();
            Ok(Event::Created {
                buffer: iter.next()
                                             .ok_or(DecodeError::InsufficientArgs)?
                                             .as_new_id()?.into(),

            })
        },
        1 /* failed */ => {
            let mut iter = args.into_iter();
            Ok(Event::Failed {

            })
        },
        _ => {
            Err(DecodeError::InvalidOpcode(op).into())
        },
        }
    }
}
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[repr(u32)]
pub enum Error {
    /// the dmabuf_batch object has already been used to create a wl_buffer,
    AlreadyUsed = 0,
    /// plane index out of bounds,
    PlaneIdx = 1,
    /// the plane index was already set,
    PlaneSet = 2,
    /// missing or too many planes to create a buffer,
    Incomplete = 3,
    /// format not supported,
    InvalidFormat = 4,
    /// invalid width or height,
    InvalidDimensions = 5,
    /// offset + stride * height goes out of dmabuf bounds,
    OutOfBounds = 6,
    /// invalid wl_buffer resulted from importing dmabufs via,
    /// the create_immed request on given buffer_params,
    InvalidWlBuffer = 7,
}

impl Error {
    pub fn from_bits(v: u32) -> Option<Self> {
        match v {
        0 => Some(Error::AlreadyUsed),
        1 => Some(Error::PlaneIdx),
        2 => Some(Error::PlaneSet),
        3 => Some(Error::Incomplete),
        4 => Some(Error::InvalidFormat),
        5 => Some(Error::InvalidDimensions),
        6 => Some(Error::OutOfBounds),
        7 => Some(Error::InvalidWlBuffer),
        _ => None,
        }
    }

    pub fn bits(&self) -> u32 {
        *self as u32
    }
}
impl Into<Arg> for Error {
    fn into(self) -> Arg {
        Arg::Uint(self.bits())
    }
}
#[derive(Copy, Clone, Debug, Eq, PartialEq)]
#[repr(u32)]
pub enum Flags {
    /// contents are y-inverted,
    YInvert = 1,
    /// content is interlaced,
    Interlaced = 2,
    /// bottom field first,
    BottomFirst = 4,
}

impl Flags {
    pub fn from_bits(v: u32) -> Option<Self> {
        match v {
        1 => Some(Flags::YInvert),
        2 => Some(Flags::Interlaced),
        4 => Some(Flags::BottomFirst),
        _ => None,
        }
    }

    pub fn bits(&self) -> u32 {
        *self as u32
    }
}
impl Into<Arg> for Flags {
    fn into(self) -> Arg {
        Arg::Uint(self.bits())
    }
}
} // mod zwp_linux_buffer_params_v1

pub use crate::zwp_linux_buffer_params_v1::ZwpLinuxBufferParamsV1;
pub use crate::zwp_linux_buffer_params_v1::Request as ZwpLinuxBufferParamsV1Request;
pub use crate::zwp_linux_buffer_params_v1::Event as ZwpLinuxBufferParamsV1Event;