[macOS] minimized and hidden (cmd+h) leaks memory and blocks.

[seivan]

It eventually crashes with thread 'main' panicked at 'attempt to add with overflow', wgpu-native/src/swap_chain.rs:177:27

Reproducible with #77 & master

Fullscreen laggs to the point of unusable - however a maxed out window size works as normal.
Moved to separate issue since it no longer leaks memory and seems to be a different problem.

Memory usage spiked while this issue went up, and did not go away once the window was brought back into focused and not fullscreen - so definitely a leak.

Edit: Happens with gfx-hal/quad+SDL|Winit examples as well.

Edit: Fix for minimized and hidden is in gfx-rs/gfx#2973

Edit: Seems to have appeared again #78 (comment)

[seivan]

Although Maximized event doesn't create a new swapchain, the previous event is Resized(_, _) and that triggers a new swapchain.

I also added a new swapchain on Maximize just to make sure in case there is a slight delay between those two events, but the issue is still there

WINDOW EVENT Exposed
WINDOW EVENT Moved(0, 0)
WINDOW EVENT SizeChanged(1920, 1200)
WINDOW EVENT Resized(1920, 1200)
WINDOW EVENT Maximized
RECREATED SWAP CHAIN: 1920 - 1200

[seivan]

Intersting tidbit. Setting sdl's window to fullscreen with the same resolution as native full screen has no issues, it seems to be related to the way windows are fullscreen-ed on macOS, tapping that green icon.

Another weird thing is, during fullscreen in macOS, things work alright when the menubar is visible. Meaning when you move the mouse to the top of the screen and the menubar slides down for a second or so, everything goes back to 60fps, but as soon as the menubar disappears it starts to lag again (2fps)

[eldyer]

This seems to be not only a macOS issue, it also occurs on my Linux / Vulkan machine. My App doesn't lag, but crashes very often in fullscreen mode (initialization error or out of memory). No problems if I switch back to windowed mode.

[seivan]

Parts of this is fixed with gfx-rs/gfx#2973

• Minimizing
• Hiding
  No longer leaks memory.

Not fixed.

• Fullscreen (maximised window) still leaks memory and kill fps.