This directory used to contain both the state tracking code for the
backends, and the common utilities that could be used both by the
backends and the rest of the code. Things are now:
- src/common is utility code for the whole repo
- src/backend contains libNXT's code
- src/utils is utility code that we don't want in libNXT
This commit also changes all includes to use global paths from src/
bacause it had to touch a bunch of #include statements anyway.
We want to test BufferMapRead validation using the null backend. To get
closer to conditions on a real backend, we call the callback only on the
next Queue::Submit. This is because on real backends, we would have to
wait for the GPU to be finished with the buffer, to be sure the correct
data is read.
Add depth and stencil tests. This is currently only implemented for the
OpenGL API. HelloDepthStencil is a test using the depth and stencil
buffers to do reflections. Currently clearing / stencil clearing is not
working properly.
