ash::vk::Display is defined as *const c_void while it should just be c_void

[philae-ael]

This is not a big issue but it makes it's usage confusing in

• XlibSurface::get_physical_device_xlib_presentation_support (takes a &mut Display)
• vk::XlibSurfaceCreateInfoKHR (takes a *mut Display)

[MarijnS95]

You're right that Xlib.h does not define Display as a pointer, but as a typedef to a forward-declared struct:

typedef struct _XDisplay Display;

And everything in C uses it as Display *. We have double pointers in our implementation that effectively confuse how Display is supposed to be used.

What I'll do is change get_physical_device_xlib_presentation_support() to take a *mut Display instead, and change the type alias to c_void.