Enum wayland_client::protocol::wl_shm_pool::Request [−][src]
#[non_exhaustive]
pub enum Request {
CreateBuffer {
offset: i32,
width: i32,
height: i32,
stride: i32,
format: WEnum<Format>,
},
Destroy,
Resize {
size: i32,
},
}
Variants (Non-exhaustive)
This enum is marked as non-exhaustive
CreateBuffer
Fields
offset: i32
buffer byte offset within the pool
width: i32
buffer width, in pixels
height: i32
buffer height, in pixels
stride: i32
number of bytes from the beginning of one row to the beginning of the next row
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.
Destroy
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
Fields
size: i32
new size of the pool, in bytes
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.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for Request
impl UnwindSafe for Request
Blanket Implementations
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