I wanna help make iOS work

[mtak-]

See this winit issue #596.

• These are the changes required to vulkano to get ios running. It's not much; most of the work required is in winit.

With the changes to winit and vulkano, I can get the triangle example to run and render a few frames before a stack overflow occurs. Any tips on debugging that issue would be awesome.

Here is the portion of the stack that loops:

#8247	0x00000001059a5e88 in _$LT$vulkano..sync..future..fence_signal..FenceSignalFuture$LT$F$GT$$u20$as$u20$vulkano..sync..future..GpuFuture$GT$::cleanup_finished::ha1c63a88ab5eb6dc at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/sync/future/fence_signal.rs:318
#8248	0x00000001059c26ac in _$LT$alloc..boxed..Box$LT$F$GT$$u20$as$u20$vulkano..sync..future..GpuFuture$GT$::cleanup_finished::h1f597a1e1a74278e at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/sync/future/mod.rs:265
#8249	0x0000000105914ea8 in _$LT$vulkano..sync..future..join..JoinFuture$LT$A$C$$u20$B$GT$$u20$as$u20$vulkano..sync..future..GpuFuture$GT$::cleanup_finished::h1f3b280fab06bd62 at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/sync/future/join.rs:73
#8250	0x0000000105986b1c in _$LT$vulkano..command_buffer..traits..CommandBufferExecFuture$LT$F$C$$u20$Cb$GT$$u20$as$u20$vulkano..sync..future..GpuFuture$GT$::cleanup_finished::hbea70a6d3adc5a99 at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/command_buffer/traits.rs:208
#8251	0x000000010596e148 in _$LT$vulkano..swapchain..swapchain..PresentFuture$LT$P$C$$u20$W$GT$$u20$as$u20$vulkano..sync..future..GpuFuture$GT$::cleanup_finished::h0b78a2635f7da078 at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/swapchain/swapchain.rs:990
#8252	0x00000001059a8e00 in _$LT$vulkano..sync..future..fence_signal..FenceSignalFuture$LT$F$GT$$GT$::cleanup_finished_impl::h04fafc4e2c5cd352 at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/sync/future/fence_signal.rs:172
#8253	0x00000001059a5e88 in _$LT$vulkano..sync..future..fence_signal..FenceSignalFuture$LT$F$GT$$u20$as$u20$vulkano..sync..future..GpuFuture$GT$::cleanup_finished::ha1c63a88ab5eb6dc at /Users/tyler/Documents/git/opengles_rust_demo/rust/vulkano/vulkano/src/sync/future/fence_signal.rs:318

[mitchmindtree]

@mtak- awesome work on getting this far! Any chance you could share an update? Did you manage to workaround this issue? I wonder #1135 is related to this - it sounds very similar.

[mtak-]

Thanks for the follow up! I forgot about this issue. I have moved over to gfx-hal. Issue #1135 definitely looks related. I wouldn't be surprised if macos/ios with moltenvk would have roughly the same problems

Aside from this issue/1135, winit should have enough plumbing to support vulkano now, as hal seems to work fine.

IIRC, to setup a vulkano surface, using the WindowBuilder extension method with_root_view_class should be all that a user has to do (besides linking to moltenvk).

ex:

window_builder.with_root_view_class(class!(MTKView) as *const _ as *const _)

I'll try and find time to test it out again.