Struct OffscreenCanvas

#[repr(C)]
pub(crate) 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(crate) fn new_inherited( width: u64, height: u64, placeholder: Option<&HTMLCanvasElement>, ) -> OffscreenCanvas

pub(crate) fn new( global: &GlobalScope, proto: Option<HandleObject<'_>>, width: u64, height: u64, placeholder: Option<&HTMLCanvasElement>, can_gc: CanGc, ) -> DomRoot<OffscreenCanvas>

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

pub(crate) fn origin_is_clean(&self) -> bool

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

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

pub(crate) fn get_or_init_2d_context( &self, can_gc: CanGc, ) -> Option<DomRoot<OffscreenCanvasRenderingContext2D>>

pub(crate) fn is_valid(&self) -> bool

pub(crate) fn placeholder(&self) -> Option<&HTMLCanvasElement>

pub(crate) fn resize(&self, size: Size2D<u64>)

Trait Implementations

impl Castable for OffscreenCanvas

fn is<T>(&self) -> bool

where T: DerivedFrom<Self>,

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

fn upcast<T>(&self) -> &T

where 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.

impl DomObjectWrap<DomTypeHolder> for OffscreenCanvas

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

fn Constructor( global: &GlobalScope, proto: Option<HandleObject<'_>>, can_gc: CanGc, width: u64, height: u64, ) -> Fallible<DomRoot<OffscreenCanvas>>

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

fn Width(&self) -> u64

fn SetWidth(&self, value: u64, can_gc: CanGc)

fn Height(&self) -> u64

fn SetHeight(&self, value: u64, can_gc: CanGc)

impl PartialEq for OffscreenCanvas

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

Tests for self and other values to be equal, and is used by ==.

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

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 Traceable for OffscreenCanvas

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

Trace self.

impl DerivedFrom<EventTarget> for OffscreenCanvas

impl Eq for OffscreenCanvas