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expect to timeout when targeting WebGL

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This commit is contained in:
teoxoy 2024-10-15 19:11:02 +02:00 committed by Teodor Tanasoaia
parent ddf0e67da7
commit 394bf37f98
2 changed files with 14 additions and 0 deletions
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10
wgpu-core/src/device/queue.rs
View File

@ -154,7 +154,10 @@ impl Drop for Queue {
self.device.raw().wait(
fence.as_ref(),
last_successful_submission_index,
#[cfg(not(target_arch = "wasm32"))]
crate::device::CLEANUP_WAIT_MS,
#[cfg(target_arch = "wasm32")]
0, // WebKit and Chromium don't support a non-0 timeout
)
};
drop(fence);
@ -163,6 +166,13 @@ impl Drop for Queue {
Ok(true) => {}
// Note: If we don't panic here we are in UB land (destroying resources while they are still in use by the GPU).
Ok(false) => {
// It's fine that we timed out on WebGL; GL objects can be deleted early as they
// will be kept around by the driver if GPU work hasn't finished.
// Moreover, the way we emulate read mappings on WebGL allows us to execute map_buffer earlier than on other
// backends since getBufferSubData is synchronous with respect to the other previously enqueued GL commands.
// Relying on this behavior breaks the clean abstraction wgpu-hal tries to maintain and
// we should find ways to improve this. See https://github.com/gfx-rs/wgpu/issues/6538.
#[cfg(not(target_arch = "wasm32"))]
panic!("We timed out while waiting on the last successful submission to complete!");
}
Err(e) => {

4
wgpu-hal/src/gles/device.rs
View File

@ -1563,6 +1563,10 @@ impl crate::Device for super::Device {
) -> Result<bool, crate::DeviceError> {
if fence.last_completed.load(Ordering::Relaxed) < wait_value {
let gl = &self.shared.context.lock();
// MAX_CLIENT_WAIT_TIMEOUT_WEBGL is:
// - 1s in Gecko https://searchfox.org/mozilla-central/rev/754074e05178e017ef6c3d8e30428ffa8f1b794d/dom/canvas/WebGLTypes.h#1386
// - 0 in WebKit https://github.com/WebKit/WebKit/blob/4ef90d4672ca50267c0971b85db403d9684508ea/Source/WebCore/html/canvas/WebGL2RenderingContext.cpp#L110
// - 0 in Chromium https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/modules/webgl/webgl2_rendering_context_base.cc;l=112;drc=a3cb0ac4c71ec04abfeaed199e5d63230eca2551
let timeout_ns = if cfg!(any(webgl, Emscripten)) {
0
} else {