PRESENT is an exclusive flag in NXT and can't be combined with other flags. The existing implementation treats the D3D12_RESOURCE_STATE_PRESENT as flag which is confusing due to being 0.
The Swapchain::Configure was changed to not require an initial usage
anymore. Previously the code was doing a transition to this usage
causing the code to now transition to <uninitialized data> usage.
Fix this by deleting code. Also make TextureD3D12 responsible for the
transition to PRESENT.
Adds the swap chain interfaces to the API without changing the behavior
of anything else. This includes the C APIs for applications to provide
swap chain implementations. Also adds stub implementations on every
backend.
Implements BeginRenderSubpass on the D3D12 backend. Descriptors for render target and depth stencil views are recorded in a descriptor heap for each framebuffer. For now, we still have the hack where no attachment renders to the backbuffer, so the CommandBuffer records those when necessary when it is submitted.
This PR also enables input states for D3D12 which are mostly working. One failure seems to be happening because our texture copies are not yet correct.
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.