[vbox-dev] MacOs Native Fullscreen

[Sergey Dubov]

Lucas Dupin <oi at lucasdup.in> писал(а) в своём письме Sun, 28 Apr 2013  
18:22:19 +0400:

> Hey guys,
> I'm working on Mac OS native fullscreen support for VirtualBox.
> It's my first time hacking the source, so I'll need some help. Ok?
>
> I've already found the class where you call showFullscreen() and  
> modified the UIMachineWindow to show the arrow on the right corner of  
> the title bar.
> The code is self contained so I don't think we're going to have  
> compatibility issues, even with older versions of MacOs, like 10.6.
>
> One minor caveat is that you'll need MacOS SDK 10.7 to compile the  
> source. I don't think it's a problem since you'll still be able to  
> target older versions, like 10.6.
>
> What I really need to do now is to test the code I've written in a  
> proper way but I can't manage to turn my Virtual Machines on.
> I ran the loadall.sh script, so I don't think it's a kernel module  
> problem.
>
> Could you give me some directions on what to do? The error I receive is:
> 	Failed to load VMMR0.r0 (VERR_GENERAL_FAILURE)
>
> And the details say:
> 	Result Code:	NS_ERROR_FAILURE (0x80004005)
> 	Component:	Console
> 	Interface:	IConsole {db7ab4ca-2a3f-4183-9243-c1208da92392}
>
>
> In debug mode, this is the stacktrace:
> 	Thread 11 Crashed:: EMT-0
> 	0   VBoxRT.dylib                  	0x000000011082ba0d  
> rtkldrConvertError(int) + 973 (ldrkStuff.cpp:197)
> 	1   VBoxRT.dylib                  	0x000000011082bf8a rtldrkLdrOpen +  
> 762 (ldrkStuff.cpp:880)
> 	2   VBoxRT.dylib                  	0x0000000110724f9c  
> rtldrOpenWithReader + 1052 (ldrEx.cpp:160)
> 	3   VBoxRT.dylib                  	0x000000011072763d RTLdrOpen + 541  
> (ldrFile.cpp:278)
> 	4   VBoxRT.dylib                  	0x0000000110871614  
> supLoadModule(char const*, char const*, char const*, void**) + 1204  
> (SUPLib.cpp:1854)
> 	5   VBoxRT.dylib                  	0x0000000110873a00 SUPR3LoadModule +  
> 160 (SUPLib.cpp:1606)
> 	6   VBoxVMM.dylib                 	0x00000001101fd14e  
> pdmR3LoadR0U(UVM*, char const*, char const*, char const*) + 830  
> (PDMLdr.cpp:673)
> 	7   VBoxVMM.dylib                 	0x00000001101fc3dc  
> PDMR3LdrLoadVMMR0U + 44 (PDMLdr.cpp:82)
> 	8   VBoxVMM.dylib                 	0x0000000110305b16 vmR3CreateU(UVM*,  
> unsigned int, int (*)(UVM*, VM*, void*), void*) + 38 (VM.cpp:586)
> 	9   VBoxVMM.dylib                 	0x0000000110312113  
> vmR3ReqProcessOneU(UVM*, VMREQ*) + 643 (VMReq.cpp:1254)
> 	10  VBoxVMM.dylib                 	0x000000011031327e VMR3ReqProcessU +  
> 1262 (VMReq.cpp:1170)
> 	11  VBoxVMM.dylib                 	0x000000011030fab8  
> vmR3EmulationThreadWithId(RTTHREADINT*, UVMCPU*, unsigned int) + 856  
> >(VMEmt.cpp:123)
> 	12  VBoxVMM.dylib                 	0x000000011030bce4  
> vmR3EmulationThread + 52 (VMEmt.cpp:62)
> 	13  VBoxRT.dylib                  	0x00000001107754d9 rtThreadMain +  
> 473 (thread.cpp:698)
> 	14  VBoxRT.dylib                  	0x00000001108648ec  
> rtThreadNativeMain(void*) + 444 (thread-posix.cpp:312)
> 	15  libsystem_c.dylib             	0x00007fff95ed47a2 _pthread_start +  
> 327
> 	16  libsystem_c.dylib             	0x00007fff95ec11e1 thread_start + 13
>
>
> Best,
> Lucas Dupin


Hi Lucas.

I just have a few words to tell about native MacOS X fullscreen feature:
1. Within the current Runtime UI architecture having native MacOS X  
fullscreen support is not something easy (if possible at all).
Fullscreen-mode is not just "an arrow at the right corner", its internal  
mechanism which takes into account different aspects of VirtualBox GUI  
behavior.
When GUI changes mode representation (from normal to fullscreen, seamless  
or scale) through the menu action it recreates internal Runtime UI logic  
and finally machine-window(s), so entering fullscreen "the true Mac way"  
is not quite possible in such case.
Note: The VirtualBox Runtime UI architecture was developed in 2010, before  
the MacOS X Lion (2011) and ML (2012) was introduced, so such things like  
"animated fullscreen support" was not taken into account at all.
2. Moreover, iirc we are still supporting build on MacOS X SDK 10.5 and  
wish to do so for now.
3. And finally MacOS X Lion which supports "native fullscreen mode"  
doesn't have possibility to enter fullscreen on other than primary screen  
(multi-screen fullscreen support appeared in MacOS X Mountain Lion) which  
is totally unacceptable.

Taking into account these facts I'd say implementing and maintaining  
something *only* for MacOS X Mountain Lion is not our way.

-- 
With Best Regards,
[Oracle/VirtualBox] Sergey Dubov
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