The easiest way to build this is to check out the dhewm3-libs project
(https://github.com/dhewm/dhewm3-libs/) to provide the dependencies
(SDL2, OpenAL, cURL) and set YQUAKE2LIBS accordingly, by passing
-DYQUAKE2LIBS=c:/path/to/dhewm3-libs/i686-w64-mingw32 to cmake.
I wouldn't really recommend building with MSVC - I just somehow made it
work and ignored all the warnings and I have no idea how portable the
resulting binaries are etc. For binaries you actually want to use, please
continue using MinGW-w64. Especially my workaround for VLAs (C99 variable
length arrays) is kinda fishy, particularly if those arrays are allocated
in a loop (that's inly done in ref_gl1.dll's code).
The only reason I did this is that I had to debug on Windows and, at least
for my specific bug, gdb didn't really work with binaries produced by
MingGW-w64 and MSVC's debugger works well with binaries produced by MSVC.
Currently requires VS 2019 16.8 or newer with C11 (/std:c11) because I
couldn't get YQ2_ALIGNAS_TYPE() to work with MSVC without _Alignas().
If we can get this to work, VS2015 or newer might suffice (but not older
versions, because their so called C standardlib didn't provide exotic
functions like snprintf()).
# Conflicts:
# CMakeLists.txt
Added checks for:
```
Memory types must not have both VK_MEMORY_PROPERTY_LAZILY_ALLOCATED_BIT
and VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT set.
```
And
```
A memory type with this flag set is only allowed to be bound to a VkImage
whose usage flags include VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT.
```
https://registry.khronos.org/vulkan/specs/1.3-extensions/man/html/VkMemoryPropertyFlagBits.html
- vk_molten_metalbuffers: enable/disable Metal buffers to bind textures
more efficiently (>= Big Sur).
- vk_molten_fastmath: enable/disable float point op optimisations.
When the validation layers fails (or not present) then we "surprisingly"
fallback to a GL renderer losing all settings too.
Here we try to create the instance but without the validation part then.
Quake II is a single threaded application, so we don't require STB to be
thread save. Omitting thread local support prevents mingw from requiring
pthreads.
