private int?GetPresentQueueFamilyIndex(SurfaceKhr surface)
{
for (int i = 0; i < queueFamilies.Length; i++)
{
//Verify that this queue-family supports presenting to the platform compositor
switch (surfaceType)
{
//On windows test if this queue supports presentation to the win32 compositor
case SurfaceType.HkrWin32:
if (!physicalDevice.GetWin32PresentationSupportKhr(i))
{
continue;
}
break;
//On MacOS it is enough to know that the MVK extension is supported, if so we
//can also present to the compositor
}
//Verify that the given surface is compatible with this queue-family
if (physicalDevice.GetSurfaceSupportKhr(i, surface))
{
return(i);
}
}
return(null);
}
internal static bool GetPresentationSupport(PhysicalDevice physicalDevice, int queueFamilyIndex)
{
// Get whether a queue family supports presentation to the platform
switch (Environment.OSVersion.Platform)
{
case PlatformID.Win32NT:
return(physicalDevice.GetWin32PresentationSupportKhr(queueFamilyIndex));
//case PlatformID.Unix:
//return physicalDevice.GetXlibPresentationSupportKhr(queueFamilyIndex);
default:
throw new NotImplementedException();
}
}
/// <summary>
/// Get the presentation support for a queue family on the platform
/// </summary>
/// <param name="device"></param>
/// <param name="queueFamilyIndex"></param>
/// <returns></returns>
private static bool GetPresentationSupport(PhysicalDevice device, int queueFamilyIndex)
{
switch (Platform.Type)
{
case Platform.PlatformType.Win32:
return(device.GetWin32PresentationSupportKhr(queueFamilyIndex));
case Platform.PlatformType.Android:
case Platform.PlatformType.MacOS:
return(true);
default:
throw new PlatformNotSupportedException(
"Getting presentation support is not implemented for this platform"
);
}
}
