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Experiments on frame pacing in Android #674

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@DJMcNab DJMcNab commented Aug 28, 2024

This is PR has two things:

  1. The proof of concept integration into with_winit of hal: cargo feature to allow using VK_GOOGLE_display_timing unsafely gfx-rs/wgpu#6149
  2. The start of a frame pacing library using this integration. This is targeted only at Android to reduce scope/risk, but similar ideas will ultimately need to be implemented for other backends. The current state of this library is as a set of ideas, with no actual implementation work.

See #gpu > Latency Investigation

examples/scenes/src/images.rs Outdated Show resolved Hide resolved
@@ -701,6 +770,8 @@ fn run(
let debug = vello::DebugLayers::none();

let mut app = VelloApp {
present_id: 0,
google_display_timing_ext_devices: vec![None; renderers.len()],
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Should keep the same order as the declaration and put them in the opposite order under renderers ?

std::thread::spawn(|| self.run());
}

/// Run a rendering task until presentation. Useful on macOS for resizing.
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Mads has been doing new work on macOS with respect to resizing!

Use my branch of `wgpu`
Also start sketching out the frame pacing library
Save some more thoughts

Continue sketch of pacing
More writings/logic
Some initial resizing logic
Continued resource management
Get the past presentation timing information

Merge branch 'achoreographer' into android-pacing
Start sketching the fully choreographed version.

Allow negative timestamp
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