ServerParams should contain the server state and not information about
client settings or capabilities. Move those things up a level to the
CConnection object.

No need to have one setting for each extension. All the client code
needs to indicate is if it supports resize. The common code can then
map this to relevant extensions.

These were either completely unused, or always true.

Tight is the default preferred encoding, so we don't really need
special handling for it to be first in the list.

This is a lot safer and cleaner. The old code had a fixed size that
we didn't properly keep track of.

Make sure all methods only write what is given as arguments, and
avoid side effects by getting data from parameter objects. This keeps
things readable in the calling code.

It's a generic client thing, so abstract it in to the common library.
Makes it easier to integrate with other common code.

Avoid using the callbacks used for runtime changes for the initial
setup. They weren't really useful anyway as you could not allocate
a framebuffer without also knowing the pixel format. So make things
more clear by letting serverInit() get the initial settings.

Add an explicit callback for subclasses to do their startup in. This
makes it easier to do proper ordering, and avoids mistakes.

We need to track different things in the server and client, so
separate things to two independent structures to keep things more
clear.

That object is just a container for the current state. Move the I/O
to the classes already doing such stuff.

There is already an implicit connection between them, so let's make
it explicit. This allows easy lookup outside of the processMsg() function.

These are just confusing and obfuscating. Do a normal delete of
these objects instead.

Include the type of exception in the string generated by each
subclass. Also simplify the constructs to what is needed.

They are created in SConnection's and CConnection's constructors but never destroyed.

There is no reason for the indirection, so lets make them direct members.

This implements the basic infrastructure for multi-threaded
decoding of rects. However there is just one thread reading data
and one thread decoding it. More logic is needed to safely decode
multiple rects at the same time.

We need more callbacks for correct operation of multi-threaded
rect decoding.

Done in preparation for multi-core decoding. Keeps the complexity
out of the other classes. This also moves ownership of the
framebuffer in to CConnection. It's the CConnection object that is
aware of the threads and how to synchronise with them. Therefore
the ownership of the framebuffer must also be there to make sure
it isn't deleted whilst threads are working.

It's often useful to see if encryption was used, and how the user
authenticated (if at all).

We have no need for this abstraction so let's keep things simple.

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change.


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