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canvas: Don't panic if webrender isn't reachable.

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This commit is contained in:
Josh Matthews 2020-06-10 10:39:52 -04:00
parent 04fae2fdca
commit 55fee1fb35
3 changed files with 7 additions and 4 deletions
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5
components/canvas/canvas_data.rs
View file

@ -982,7 +982,10 @@ impl<'a> CanvasData<'a> {
updates.push(ImageUpdate::Update(image_key, descriptor, data));
},
None => {
let key = self.webrender_api.generate_key();
let key = match self.webrender_api.generate_key() {
Ok(key) => key,
Err(()) => return,
};
updates.push(ImageUpdate::Add(key, descriptor, data));
self.image_key = Some(key);
debug!("New image {:?}.", self.image_key);

2
components/canvas/canvas_paint_thread.rs
View file

@ -26,7 +26,7 @@ pub enum ImageUpdate {
}
pub trait WebrenderApi {
fn generate_key(&self) -> webrender_api::ImageKey;
fn generate_key(&self) -> Result<webrender_api::ImageKey, ()>;
fn update_images(&self, updates: Vec<ImageUpdate>);
fn clone(&self) -> Box<dyn WebrenderApi>;
}

4
components/servo/lib.rs
View file

@ -949,12 +949,12 @@ impl gfx_traits::WebrenderApi for FontCacheWR {
struct CanvasWebrenderApi(CompositorProxy);
impl canvas_paint_thread::WebrenderApi for CanvasWebrenderApi {
fn generate_key(&self) -> webrender_api::ImageKey {
fn generate_key(&self) -> Result<webrender_api::ImageKey, ()> {
let (sender, receiver) = unbounded();
let _ = self.0.send(Msg::Webrender(WebrenderMsg::Canvas(
WebrenderCanvasMsg::GenerateKey(sender),
)));
receiver.recv().unwrap()
receiver.recv().map_err(|_| ())
}
fn update_images(&self, updates: Vec<canvas_paint_thread::ImageUpdate>) {
let _ = self.0.send(Msg::Webrender(WebrenderMsg::Canvas(