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constellation: Make setting up the WebGL state fallible.

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This fixes a regression caused by the glutin update.

We now are creating EGL contexts in Linux Wayland, instead of X context, so the
GLContextFactory assumption of one GL back-end per platform is broken.

This just works around it, for now, but in general I think not relying on
available WebGL state is a good thing, and we do that already for WebVR anyway.
This commit is contained in:
Emilio Cobos Álvarez 2018-03-09 23:27:29 +01:00
parent 3fc5bf87d3
commit 21df4014db
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GPG key ID: 056B727BB9C1027C
8 changed files with 48 additions and 31 deletions
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6
components/script/dom/webglrenderingcontext.rs
View file

@ -224,8 +224,12 @@ impl WebGLRenderingContext {
return Err("WebGL context creation error forced by pref `webgl.testing.context_creation_error`".into());
}
let webgl_chan = match window.webgl_chan() {
Some(chan) => chan,
None => return Err("WebGL initialization failed early on".into()),
};
let (sender, receiver) = webgl_channel().unwrap();
let webgl_chan = window.webgl_chan();
webgl_chan.send(WebGLMsg::CreateContext(webgl_version, size, attrs, sender))
.unwrap();
let result = receiver.recv().unwrap();

8
components/script/dom/window.rs
View file

@ -257,9 +257,9 @@ pub struct Window {
test_runner: MutNullableDom<TestRunner>,
/// A handle for communicating messages to the webvr thread, if available.
/// A handle for communicating messages to the WebGL thread, if available.
#[ignore_malloc_size_of = "channels are hard"]
webgl_chan: WebGLChan,
webgl_chan: Option<WebGLChan>,
/// A handle for communicating messages to the webvr thread, if available.
#[ignore_malloc_size_of = "channels are hard"]
@ -402,7 +402,7 @@ impl Window {
self.current_viewport.clone().get()
}
pub fn webgl_chan(&self) -> WebGLChan {
pub fn webgl_chan(&self) -> Option<WebGLChan> {
self.webgl_chan.clone()
}
@ -1756,7 +1756,7 @@ impl Window {
origin: MutableOrigin,
navigation_start: u64,
navigation_start_precise: u64,
webgl_chan: WebGLChan,
webgl_chan: Option<WebGLChan>,
webvr_chan: Option<IpcSender<WebVRMsg>>,
microtask_queue: Rc<MicrotaskQueue>,
webrender_document: DocumentId,