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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
ports/servoshell/desktop/headed_window.rs
View file

@ -536,10 +536,10 @@ impl WindowMethods for Window {
EmbedderCoordinates {
viewport,
framebuffer: viewport.size(),
window: (window_size, window_origin),
screen,
window_rect: DeviceIntRect::from_origin_and_size(window_origin, window_size),
screen_size: screen,
// FIXME: Winit doesn't have API for available size. Fallback to screen size
screen_avail: screen,
available_screen_size: screen,
hidpi_factor: self.hidpi_factor(),
}
}

6
ports/servoshell/desktop/headless_window.rs
View file

@ -167,9 +167,9 @@ impl WindowMethods for Window {
EmbedderCoordinates {
viewport,
framebuffer: size,
window: (size, Point2D::zero()),
screen: size,
screen_avail: size,
window_rect: DeviceIntRect::from_origin_and_size(Point2D::zero(), size),
screen_size: size,
available_screen_size: size,
hidpi_factor: dpr,
}
}