Struct script::dom::offscreencanvas::OffscreenCanvas

#[repr(C)]
pub struct OffscreenCanvas {
    eventtarget: EventTarget,
    width: Cell<u64>,
    height: Cell<u64>,
    context: DomRefCell<Option<OffscreenCanvasContext>>,
    placeholder: Option<Dom<HTMLCanvasElement>>,
}

Fields

eventtarget: EventTarget

width: Cell<u64>

height: Cell<u64>

context: DomRefCell<Option<OffscreenCanvasContext>>

placeholder: Option<Dom<HTMLCanvasElement>>

Implementations

impl OffscreenCanvas

fn __assert_parent_type(&self)

impl OffscreenCanvas

pub fn new_inherited(
    width: u64,
    height: u64,
    placeholder: Option<&HTMLCanvasElement>
) -> OffscreenCanvas

fn new(
    global: &GlobalScope,
    proto: Option<HandleObject<'_>>,
    width: u64,
    height: u64,
    placeholder: Option<&HTMLCanvasElement>
) -> Root<Dom<OffscreenCanvas>>

pub fn Constructor(
    global: &GlobalScope,
    proto: Option<HandleObject<'_>>,
    width: u64,
    height: u64
) -> Result<Root<Dom<OffscreenCanvas>>, Error>

pub fn get_size(&self) -> Size2D<u64>

pub fn origin_is_clean(&self) -> bool

pub fn context(&self) -> Option<Ref<'_, OffscreenCanvasContext>>

pub fn fetch_all_data(&self) -> Option<(Option<IpcSharedMemory>, Size2D<u32>)>

fn get_or_init_2d_context(
    &self
) -> Option<Root<Dom<OffscreenCanvasRenderingContext2D>>>

pub fn is_valid(&self) -> bool

Trait Implementations

impl Castable for OffscreenCanvas

fn is<T>(&self) -> boolwhere
    T: DerivedFrom<Self>,

Check whether a DOM object implements one of its deriving interfaces.

fn upcast<T>(&self) -> &Twhere
    T: Castable,
    Self: DerivedFrom<T>,

Cast a DOM object upwards to one of the interfaces it derives from.

fn downcast<T>(&self) -> Option<&T>where
    T: DerivedFrom<Self>,

Cast a DOM object downwards to one of the interfaces it might implement.

impl DomObject for OffscreenCanvas

fn reflector(&self) -> &Reflector

Returns the receiver’s reflector.

fn global(&self) -> Root<Dom<GlobalScope>>where
    Self: Sized,

Returns the global scope of the realm that the DomObject was created in.

impl DomObjectWrap for OffscreenCanvas

const WRAP: unsafe fn(_: SafeJSContext, _: &GlobalScope, _: Option<HandleObject<'_>>, _: Box<Self>) -> Root<Dom<Self>> = {dom::bindings::codegen::Bindings::OffscreenCanvasBinding::OffscreenCanvasBinding::Wrap as for<'a, 'b> unsafe fn(script_runtime::JSContext, &'a dom::globalscope::GlobalScope, std::option::Option<js::rust::Handle<'b, *mut js::jsapi::JSObject>>, std::boxed::Box<dom::offscreencanvas::OffscreenCanvas>) -> dom::bindings::root::Root<dom::bindings::root::Dom<dom::offscreencanvas::OffscreenCanvas>>}

Function pointer to the general wrap function type

impl HasParent for OffscreenCanvas

fn as_parent(&self) -> &EventTarget

This is used in a type assertion to ensure that the source and webidls agree as to what the parent type is

type Parent = EventTarget

impl IDLInterface for OffscreenCanvas

fn derives(class: &'static DOMClass) -> bool

Returns whether the given DOM class derives that interface.

impl JSTraceable for OffscreenCanvas

unsafe fn trace(&self, tracer: *mut JSTracer)

Trace self.

impl MallocSizeOf for OffscreenCanvas

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl MutDomObject for OffscreenCanvas

unsafe fn init_reflector(&self, obj: *mut JSObject)

Initializes the Reflector

impl OffscreenCanvasMethods for OffscreenCanvas

fn GetContext(
    &self,
    _cx: JSContext,
    id: DOMString,
    _options: HandleValue<'_>
) -> Option<OffscreenRenderingContext>

fn Width(&self) -> u64

fn SetWidth(&self, value: u64)

fn Height(&self) -> u64

fn SetHeight(&self, value: u64)

impl PartialEq<OffscreenCanvas> for OffscreenCanvas

fn eq(&self, other: &OffscreenCanvas) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ToJSValConvertible for OffscreenCanvas

unsafe fn to_jsval(&self, cx: *mut JSContext, rval: MutableHandleValue<'_>)

Convert self to a JSVal. JSAPI failure causes a panic.

impl DerivedFrom<EventTarget> for OffscreenCanvas