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Fetch correct query pool

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It should fetch the last query pool, and was off by one. That worked on
my machine (windows), but did cause panics.
This commit is contained in:
Raph Levien 2020-12-09 08:34:01 -08:00
parent 3906f348fd
commit 769d71915e
1 changed files with 10 additions and 2 deletions
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12
piet-gpu/bin/winit.rs
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@ -45,6 +45,7 @@ fn main() -> Result<(), Error> {
let renderer = Renderer::new(&session, scene, n_paths, n_pathseg)?;
let mut submitted: Option<hub::SubmittedCmdBuf> = None;
let mut last_frame_idx = 0;
event_loop.run(move |event, _, control_flow| {
*control_flow = ControlFlow::Poll; // `ControlFlow::Wait` if only re-render on event
@ -63,12 +64,16 @@ fn main() -> Result<(), Error> {
}
Event::RedrawRequested(window_id) if window_id == window.id() => {
let frame_idx = current_frame % NUM_FRAMES;
let query_pool = &query_pools[frame_idx];
// Note: this logic is a little strange. We have two sets of renderer
// resources, so we could have two frames in flight (submit two, wait on
// the first), but we actually just wait on the last submitted.
//
// Getting this right will take some thought.
if let Some(submitted) = submitted.take() {
submitted.wait().unwrap();
let ts = session.fetch_query_pool(query_pool).unwrap();
let ts = session.fetch_query_pool(&query_pools[last_frame_idx]).unwrap();
window.set_title(&format!(
"{:.3}ms :: e:{:.3}ms|alloc:{:.3}ms|cp:{:.3}ms|bd:{:.3}ms|bin:{:.3}ms|cr:{:.3}ms|r:{:.3}ms",
ts[6] * 1e3,
@ -82,8 +87,10 @@ fn main() -> Result<(), Error> {
));
}
let (image_idx, acquisition_semaphore) = swapchain.next().unwrap();
let swap_image = swapchain.image(image_idx);
let query_pool = &query_pools[frame_idx];
let mut cmd_buf = session.cmd_buf().unwrap();
cmd_buf.begin();
renderer.record(&mut cmd_buf, &query_pool);
@ -105,6 +112,7 @@ fn main() -> Result<(), Error> {
&[present_semaphores[frame_idx]],
)
.unwrap());
last_frame_idx = frame_idx;
swapchain
.present(image_idx, &[present_semaphores[frame_idx]])