Hello.
I try to retrieve the virtual machine screen frames to display them inside my
Qt application. For interaction with VirtualBox I use VBox SDK 6.1 (Glue C API)
in order to support all target OSes: Linux, macOS and Windows.
I use the following solution to receive the VM's frames. I implemented custom
IFramebuffer structure and all its' functions. In particular I implemented
get_Capabilities(), NotifyChange(), NotifyUpdate() and NotifyUpdateImage()
functions.
Inside get_Capabilities() I set FramebufferCapabilities_UpdateImage,
FramebufferCapabilities_RenderCursor, FramebufferCapabilities_MoveCursor
capabilities. Inside NotifyUpdateImage() I catch frames and pass them to the Qt
part of the application. This Framebuffer is attached to IDisplay instance
using AttachFramebuffer() method call.
This solution works correctly on Linux and macOS, it does not under Windows.
Problem is that the NotifyUpdateImage() function is not called. So the
application does not receive the frames from the virtual machine.
I ask for an advice. Is it correct way to retrieve VM's frames by implementing
IFramebuffer and attaching it to IDisplay for Windows?
I publish the source code of example on GitHub:
https://github.com/ivanshchitov/VBoxCAPISample
<https://github.com/ivanshchitov/VBoxCAPISample>. For debug purposes it runs
virtual machine and prints messages from the Framebuffer's functions into
console. Can you help with configuring the code for Windows?
Best regards, Ivan.
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