[PATCH vkd3d v2 5/5] Add support for MoltenVK on Mac OS.

[Henri Verbeet]

On 7 August 2018 at 23:24, Chip Davis <cdavis at codeweavers.com> wrote:
> August 7, 2018 1:42 PM, "Henri Verbeet" <hverbeet at gmail.com> wrote:
>> On 4 August 2018 at 01:42, Chip Davis <cdavis at codeweavers.com> wrote:
>>> static const char * const instance_extensions[] =
>>> {
>>> VK_KHR_SURFACE_EXTENSION_NAME,
>>> +#ifdef HAVE_MOLTENVK_VK_MVK_MOLTENVK_H
>>> + VK_MVK_MACOS_SURFACE_EXTENSION_NAME,
>>> +#elif defined(HAVE_XCB_XCB_H)
>>> VK_KHR_XCB_SURFACE_EXTENSION_NAME,
>>> +#endif
>>
>> I don't think those are necessarily mutually exclusive.
> Except that these are passed as required extensions. That means that if any aren't present, VkInstance creation will fail.

Hmm, right, that's a bit of an issue. The case of supporting both
MoltenVK and XCB is probably mostly theoretic for the foreseeable
future, but the case of supporting both XCB and Wayland with a single
build of vkd3d is very real. Other than the "adapter" argument,
D3D12CreateDevice() doesn't provide a lot of opportunities to request
a specific windowing system. We may have to try what works at runtime.