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https://github.com/servo/servo.git
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9195344b75
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>
93 lines
3 KiB
Rust
93 lines
3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use dom_struct::dom_struct;
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use euclid::Size2D;
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use profile_traits::ipc;
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use style_traits::CSSPixel;
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use webrender_api::units::DeviceIntSize;
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use webrender_traits::CrossProcessCompositorMessage;
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use crate::dom::bindings::codegen::Bindings::ScreenBinding::ScreenMethods;
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use crate::dom::bindings::num::Finite;
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use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
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use crate::dom::bindings::root::{Dom, DomRoot};
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use crate::dom::window::Window;
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#[dom_struct]
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pub struct Screen {
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reflector_: Reflector,
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window: Dom<Window>,
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}
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impl Screen {
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fn new_inherited(window: &Window) -> Screen {
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Screen {
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reflector_: Reflector::new(),
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window: Dom::from_ref(window),
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}
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}
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pub fn new(window: &Window) -> DomRoot<Screen> {
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reflect_dom_object(Box::new(Screen::new_inherited(window)), window)
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}
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fn screen_size(&self) -> Size2D<u32, CSSPixel> {
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let (send, recv) =
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ipc::channel::<DeviceIntSize>(self.global().time_profiler_chan().clone()).unwrap();
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self.window
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.compositor_api()
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.sender()
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.send(CrossProcessCompositorMessage::GetScreenSize(send))
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.unwrap();
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let dpr = self.window.device_pixel_ratio();
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let screen = recv.recv().unwrap_or(Size2D::zero());
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(screen.to_f32() / dpr).to_u32()
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}
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fn screen_avail_size(&self) -> Size2D<u32, CSSPixel> {
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let (send, recv) =
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ipc::channel::<DeviceIntSize>(self.global().time_profiler_chan().clone()).unwrap();
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self.window
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.compositor_api()
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.sender()
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.send(CrossProcessCompositorMessage::GetAvailableScreenSize(send))
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.unwrap();
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let dpr = self.window.device_pixel_ratio();
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let screen = recv.recv().unwrap_or(Size2D::zero());
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(screen.to_f32() / dpr).to_u32()
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}
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}
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impl ScreenMethods for Screen {
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// https://drafts.csswg.org/cssom-view/#dom-screen-availwidth
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fn AvailWidth(&self) -> Finite<f64> {
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Finite::wrap(self.screen_avail_size().width as f64)
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}
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// https://drafts.csswg.org/cssom-view/#dom-screen-availheight
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fn AvailHeight(&self) -> Finite<f64> {
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Finite::wrap(self.screen_avail_size().height as f64)
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}
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// https://drafts.csswg.org/cssom-view/#dom-screen-width
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fn Width(&self) -> Finite<f64> {
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Finite::wrap(self.screen_size().width as f64)
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}
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// https://drafts.csswg.org/cssom-view/#dom-screen-height
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fn Height(&self) -> Finite<f64> {
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Finite::wrap(self.screen_size().height as f64)
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}
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// https://drafts.csswg.org/cssom-view/#dom-screen-colordepth
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fn ColorDepth(&self) -> u32 {
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24
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}
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// https://drafts.csswg.org/cssom-view/#dom-screen-pixeldepth
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fn PixelDepth(&self) -> u32 {
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24
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}
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}
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