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compositor: Create a single cross-process compositor API (#33619) (#33660)

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Instead of exposing many different kinds of messages to the compositor
that are routed through the constellation, expose a single message type
which can be sent across IPC channels. In addition, this IPC channel and
the route to the crossbeam channel with the compositor is created along
with the `CompositorProxy`, simplifying what needs to be passed around
during pipeline initialization.

Previously, some image updates (from video) were sent over IPC with a
special serialization routine and some were sent via crossbeam channels
(canvas). Now all updates go over the IPC channel `IpcSharedMemory` is
used to avoid serialization penalties. This should improve performance
and reduce copies for video, but add a memory copy overhead for canvas.
This will improve in the future when canvas renders directly into a
texture.

All-in-all this is a simplification which opens the path toward having a
standard compositor API and reduces the number of duplicate messages and
proxying that had to happen in libservo.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2024-10-09 10:30:24 -07:00 • committed by GitHub
parent 30cbf01280
commit 9195344b75
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28 changed files with 547 additions and 800 deletions
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6
components/fonts/tests/font_context.rs
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@ -33,7 +33,7 @@ use style::values::computed::{FontLanguageOverride, XLang};
use style::values::generics::font::LineHeight;
use style::ArcSlice;
use webrender_api::{FontInstanceKey, FontKey, IdNamespace};
use webrender_traits::WebRenderScriptApi;
use webrender_traits::CrossProcessCompositorApi;
struct TestContext {
context: FontContext,
@ -47,11 +47,11 @@ impl TestContext {
let (core_sender, _) = ipc::channel().unwrap();
let (storage_sender, _) = ipc::channel().unwrap();
let mock_resource_threads = ResourceThreads::new(core_sender, storage_sender);
let mock_webrender_api = WebRenderScriptApi::dummy();
let mock_compositor_api = CrossProcessCompositorApi::dummy();
let proxy_clone = Arc::new(system_font_service_proxy.to_sender().to_proxy());
Self {
context: FontContext::new(proxy_clone, mock_webrender_api, mock_resource_threads),
context: FontContext::new(proxy_clone, mock_compositor_api, mock_resource_threads),
system_font_service,
system_font_service_proxy,
}