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dom: Add stub implementation for HTMLCanvasElement.captureStream.

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This commit is contained in:
Josh Matthews 2020-07-14 12:06:46 -04:00
parent 9fe92ecb4c
commit 1ae117f67b
4 changed files with 24 additions and 0 deletions
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15
components/script/dom/htmlcanvaselement.rs
View file

@ -7,10 +7,12 @@ use crate::dom::bindings::cell::{ref_filter_map, DomRefCell, Ref};
use crate::dom::bindings::codegen::Bindings::HTMLCanvasElementBinding::{
HTMLCanvasElementMethods, RenderingContext,
};
use crate::dom::bindings::codegen::Bindings::MediaStreamBinding::MediaStreamMethods;
use crate::dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLContextAttributes;
use crate::dom::bindings::conversions::ConversionResult;
use crate::dom::bindings::error::{Error, Fallible};
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::num::Finite;
use crate::dom::bindings::reflector::DomObject;
use crate::dom::bindings::root::{Dom, DomRoot, LayoutDom};
use crate::dom::bindings::str::{DOMString, USVString};
@ -22,6 +24,8 @@ use crate::dom::element::{AttributeMutation, Element, LayoutElementHelpers};
use crate::dom::globalscope::GlobalScope;
use crate::dom::gpucanvascontext::GPUCanvasContext;
use crate::dom::htmlelement::HTMLElement;
use crate::dom::mediastream::MediaStream;
use crate::dom::mediastreamtrack::MediaStreamTrack;
use crate::dom::node::{window_from_node, Node};
use crate::dom::virtualmethods::VirtualMethods;
use crate::dom::webgl2renderingcontext::WebGL2RenderingContext;
@ -41,6 +45,8 @@ use js::rust::HandleValue;
use profile_traits::ipc;
use script_layout_interface::{HTMLCanvasData, HTMLCanvasDataSource};
use script_traits::ScriptMsg;
use servo_media::streams::registry::MediaStreamId;
use servo_media::streams::MediaStreamType;
use style::attr::{AttrValue, LengthOrPercentageOrAuto};
const DEFAULT_WIDTH: u32 = 300;
@ -429,6 +435,15 @@ impl HTMLCanvasElementMethods for HTMLCanvasElement {
base64::encode_config_buf(&png, base64::STANDARD, &mut url);
Ok(USVString(url))
}
/// https://w3c.github.io/mediacapture-fromelement/#dom-htmlcanvaselement-capturestream
fn CaptureStream(&self, _frame_request_rate: Option<Finite<f64>>) -> DomRoot<MediaStream> {
let global = self.global();
let stream = MediaStream::new(&*global);
let track = MediaStreamTrack::new(&*global, MediaStreamId::new(), MediaStreamType::Video);
stream.AddTrack(&track);
stream
}
}
impl VirtualMethods for HTMLCanvasElement {

5
components/script/dom/webidls/HTMLCanvasElement.webidl
View file

@ -23,4 +23,9 @@ interface HTMLCanvasElement : HTMLElement {
//OffscreenCanvas transferControlToOffscreen();
};
partial interface HTMLCanvasElement {
[Pref="dom.canvas_capture.enabled"]
MediaStream captureStream (optional double frameRequestRate);
};
//callback BlobCallback = void (Blob? blob);