Since the top-level table is getting undefined, all the things in it will
be unreachable and eligible for garbage collection without explicitly
nulling them out.
Now, if the AudioContext starts in a "suspended" state, because the browser
blocked it from playing by default, we we run the audio "thread" in a timer
and throw away the generated audio. Once the AudioContext is allowed to
resume, we clear this timer.
The end result is that the app will continue to drain its audio queue
instead of consuming more memory over time (and, if it relies on an audio
callback to make progress, continue to run!), with the effect that the
page is merely silent but otherwise functioning as intended.
Once the user interacts with the page and the browser permits the the
AudioContext to run for real, audio should still be in sync, instead of
just starting to play audio that might now be at least several seconds behind.
The default cursor was being leaked on destruction as it is not in the cursor list, and subsequently SDL_DestroyCursor() wouldn't call the free function for it.
Some of the SDL_Convert_F32_to_*_SSE2 do not explicitly clamp the input,
but instead rely on saturating casts.
Inputs very far outside the valid [-1.0, 1.0] range may produce
an incorrect result, but I believe that is an acceptable trade-off.
The video core applies pending minimized/maximized/restored state to windows when they transition from the hidden to shown state, so no need to handle it internally anymore.
The 'orderOut' method has no effect on miniaturized windows, so 'close' must be used to remove the window from the desktop, dock, and window list in this case.
SDL holds a strong reference to the window (oneShot/releasedWhenClosed are 'NO'), and calling 'close' doesn't send a 'windowShouldClose' message, so it's safe to use for this purpose as nothing is implicitly released.
SDL considers a hidden window to be unmapped and blocks or defers certain operations until the window is shown again, however, the X11 and Cocoa backends would set the hidden flag when the window was minimized, which blocked the functionality of SDL_RestoreWindow().
Specify that a window with the hidden flag set is unmapped and not visible on the desktop or in the dock/taskbar without a call to SDL_ShowWindow(), and don't set the hidden flag in the X11 and Cocoa backends when the window is in the minimized state, but still mapped to the desktop.
