Check for Vulkan or Metal request and don't force OpenGL

[onehundredfeet]

To make adding Vulcan or metal easier, I removed the forced OpenGL specification on the window creation and only add it if neither Vulcan nor metal is added.

This will make it backwards compatible while also allowing Vulkan or Metal windows to be created.

[onehundredfeet]

The checks are failing because Neko not installing.

Chocolatey installed 1/2 packages. 1 packages failed.
 See the log for details (C:\ProgramData\chocolatey\logs\chocolatey.log).

Failures
 - vcredist2015 (exited 1) - vcredist2015 not installed. An error occurred during installation:
 Error downloading 'vcredist2015.14.0.24215.20170201 : vcredist140 [14.0.24215.1, )' from 'https://community.chocolatey.org/api/v2/package/vcredist2015/14.0.24215.20170201'.

[onehundredfeet]

any chance of a merge?

[ncannasse]

Look at the vulkan branch if you want to see how I did the SDL setup here : https://github.com/HaxeFoundation/hashlink/tree/vulkan
And this in particular
d15f466

[onehundredfeet]

It looks like the sdl_vulkan header is not available on the windows build machines. What's the best solution here?

1. Guard using a define?
2. Add the headers to the repo?
3. Something else?

[yuxiaomao]

CI Fixed