Re: [OpenSmalltalk/opensmalltalk-vm] Newspeak VMs do not open the Newspeak UI on Windows (#151)

 

The UI does not open, neither on 32bits nor 64bits VM, so this is probably not related to X64 ABI.
I put a break in ioShowDisplay with gdb and the VM is going there (via primitiveShowDisplayRect).
It is painting a region of a bitmap.
But since the window is not visible (hidden?) nothing seems to happen...

I'm not a specialist of windows UI, but there must be some obvious GUI call missing...
There should be a ShowWindow(stWindow,SW_SHOW) or something like that.

There is one in ioForceDisplayUpdate() but only #if !NewspeakVM.
It is suggested that Newspeak has to explicitely emit such request...
See https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/36270b33202975eee7adab9fa0905dd48421e1ef/platforms/win32/vm/sqWin32Window.c#L2263

I have checked the history of platforms/win32 around may/june 2016, not much happened there...
https://github.com/OpenSmalltalk/opensmalltalk-vm/commits/Cog?after=36270b33202975eee7adab9fa0905dd48421e1ef+244&path%5B%5D=platforms&path%5B%5D=win32&path%5B%5D=vm

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If I remove the guard at line 2263 and recompile the VM, I see the newspeak window appear...
So it looks like an essential call to ShowWindow is missing or failed (via FFI???).

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Ah Ah, but then I see a debugger with stack setupWindowProc...
Error Case not found PointerFFICallbackThunk...

So I suggest to amend line 2263 of sqWin32Window.c (#if 1) recompile, debug newspeak, then return to regular VM.

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