[vbox-dev] bug in H3DOR_FMT_RGBA support for offscreen framebuffer redirection

Vitali Pelenjow Vitali.Pelenjow at oracle.com
Thu May 19 18:48:47 UTC 2016

Hi Rudolfs,

H3DOR_FMT_RGBA was added as a placeholder for a possible optimization.
Exactly as you said to avoid additional conversion to _TOPDOWN.
However it was  never implemented  in display_vrdp.cpp. I.e. only the
ConsoleVRDPServer side has been implemented.

You could try to implement H3DOR_FMT_RGBA.
I do not think anyone here has time for this in near future.


Rūdolfs Bundulis wrote:
> Hi,
> While implementing 3D redirection in my framebuffer I think I've 
> discovered a bug - the H3DOR_FMT_RGBA format is not handled properly. 
> If you look at display_vrdp.cpp:345 then if the returned strings do 
> not match H3DOR_FMT_RGBA_TOPDOWN then successful return code is 
> returned but the initialization functions are called which results in 
> my framebuffer getting a null pointer in all the instance parameters 
> passed to the calls. I guess since the vrdp server sets both 
> everything goes fine and only issues can be experienced with external 
> framebuffers.
> What is more interesting to me - is H3DOR_FMT_RGBA going to be 
> supported? I am mixing the contents of the GPU framebuffer and the 
> offscreen OpenGl surface and having to rotate the latter makes a bit 
> of an inconvenience
> Best Regards,
> Rudolfs Bundulis
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