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ohos: Present on vsync signals (#33117)

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Rely on callbacks from the vertical synchronization driver,
to drive presentation.
Future commits will base animation updates and touchless
gestures like fling off these vsync events.

Signed-off-by: Jonathan Schwender <jonathan.schwender@huawei.com>
Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
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Jonathan Schwender 2024-08-30 21:25:50 +08:00 • committed by GitHub
parent a58d816319
commit 8a0c7487e7
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6 changed files with 83 additions and 9 deletions
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8
ports/servoshell/egl/host_trait.rs
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@ -39,7 +39,13 @@ pub trait HostTrait {
/// Page animation state has changed. If animating, it's recommended
/// that the embedder doesn't wait for the wake function to be called
/// to call perform_updates. Usually, it means doing:
/// while true { servo.perform_updates() }. This will end up calling flush
/// ```rust
/// while true {
/// servo.perform_updates();
/// servo.present_if_needed();
/// }
/// ```
/// . This will end up calling flush
/// which will call swap_buffer which will be blocking long enough to limit
/// drawing at 60 FPS.
/// If not animating, call perform_updates only when needed (when the embedder