* In python globals aren't really global, they're just module-level
variables. So to find our _renderdoc_internal we have to potentailly
walk the stack if we're inside another module until we get to the
globals dict we set up.
* If a window (like the PythonShell) owned a context and only stopped it
on destruction, it would be destructed after the global shutdown
destroyed the interpreter.
* This allows us to return complex types like byte arrays or pairs of
status & render handle.
* Also in future more introspection of the capture file will be possible
and this provides an easy extension to that without adding new entry
points.
* In python it's not as quick to get ~0U since ints aren't unsigned or
fixed size. Adding named constants makes it easier for people to use
the right values, and C++ users can still pass ~0U.
* Generally this means removing ref out parameters and instead returning
values. In a couple of cases we will want to avoid copies in future
either by returning const references (e.g. to the pipeline state which
is immutable).
* At the same time, some pointless bool return values that were always
true and didn't indicate errors have been removed. They can be added
again if an error condition comes back.
* Some free functions still have out parameters as C linkage doesn't
allow returning user types by value.
* The C# UI still invokes into C wrappers for all the C++ classes, which
handle taking the return value and doing a copy into an out parameter
still for compatibility.
* This means that if we BlockInvoke a python callback, we don't end up
in a deadlock where we're holding the GIL during script execution but
also waiting on the renderer running (which is trying to acquire the
GIL before calling the callback).
* Note, this API is still in-flux and beta, so there may still be some
more changes before it's 'stable', and even then it will still be
subject to some amount of change.
* This API is then exposed to python via SWIG bindings and hides
internals that don't need to be visible, and means the actual API is
easier to work with.
* We also use this API to reduce inter-dependencies between different
windows that need to interact with each other at a high level.
* The naming is python/standard RenderDoc TitleCase method names, not
Qt style camelCase methods.
# Conflicts:
# qrenderdoc/Windows/PipelineState/D3D11PipelineStateViewer.cpp
# qrenderdoc/Windows/TextureViewer.cpp
baldurk