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libservo: Expose an OffscreenRenderingContext and use it for servoshell (#35465)

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Create a new `RenderingContext` which is used to render to a
`SurfmanRenderingContext`-related offscreen buffer. This allows having a
temporary place to render Servo and then blitting the results to a
subsection of the parent `RenderingContext`.

The goal with this change is to remove the details of how servoshell
renders from the `Compositor` and prepare for the compositor-per-WebView
world.


Co-authred-by: Ngo Iok Ui (Wu Yu Wei) <yuweiwu@pm.me>

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Martin Robinson 2025-02-17 09:35:05 +01:00 • committed by GitHub
parent d466688526
commit 6dce329acc
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15 changed files with 655 additions and 608 deletions
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2
ports/servoshell/desktop/window_trait.rs
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@ -11,6 +11,7 @@ use euclid::{Length, Scale};
use servo::compositing::windowing::WindowMethods;
use servo::servo_geometry::DeviceIndependentPixel;
use servo::webrender_api::units::{DeviceIntPoint, DeviceIntSize, DevicePixel};
use servo::webrender_traits::rendering_context::RenderingContext;
use servo::{Cursor, WebView};
use super::app_state::RunningAppState;
@ -46,4 +47,5 @@ pub trait WindowPortsMethods: WindowMethods {
fn winit_window(&self) -> Option<&winit::window::Window>;
fn toolbar_height(&self) -> Length<f32, DeviceIndependentPixel>;
fn set_toolbar_height(&self, height: Length<f32, DeviceIndependentPixel>);
fn rendering_context(&self) -> Rc<dyn RenderingContext>;
}