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

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

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

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.

Fields of SetSource

x: f64
y: f64
width: f64
height: f64

SetDestination

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.

Fields of SetDestination

width: i32
height: i32

Trait Implementations

impl MessageGroup for Request

fn is_destructor(&self) -> bool

Whether this message is a destructor

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