Technically we can generate every possible render-pass up-front based on
the possible combinations of ColorFmt and DepthFmt, but we should only
allocate what the game asks for. Save that pattern for pipelines.
This surface is managed by SDL itself, so there is no need to keep it in
a Unique handle for us to delete. Fixes the bug where vulkan crashes
during shutdown.
Instead of operating directly on the swapchain images, we have our own
top/bottom framebuffer images that will be rendered to independent of
having an available swapchain. The images are blitted into the swapchain
images, allowing for resizing too!
Lots of todos, this should probably just be its own self-contained
object to allow the emulator to render "headlessly" regardless of a
swapchain existing or not.
This value is needed for vulkan to properly allocate a surface, and would benefit OpenGL to move more of its initialization code into here rather than in `emulator.cpp`.
Headlessly creates a new vulkan instance, with conditional MacOS
support, and enables the `VK_EXT_debug_utils` instance-extension with a
debug-messenger to hook onto validation layer messages.
A lot of the architecture of the emulator here does not allow for vulkan
to initialize easily since it involves a bit of data to be exchanged
between SDL and Vulkan. This commit just adds the foundational linkage
and library code for vulkan support.
