private IEnumerable <uint> GetPresentQueues(SharpVk.PhysicalDevice device, VKSurface surface)
{
// - Gets GPU command queues
var queues = device.GetQueueFamilyProperties();
for (uint i = 0; i < queues.Length; ++i)
{
if (device.GetSurfaceSupport(i, surface.Handle))
{
yield return(i);
}
}
}
private IEnumerable <SharpVk.PhysicalDevice> FilterSuitableDevices(IEnumerable <SharpVk.PhysicalDevice> devices, VKSurface surface)
{
bool SuitabilityCriteria(SharpVk.PhysicalDevice device)
{
// - Gets device features
var features = device.GetFeatures();
// - Check if this GPU has a graphic queue
if (GetSuitableQueues(device, QueueFlags.Graphics).Count() <= 0)
{
return(false);
}
// - Check if this GPU has a compatible drawing surface
if (GetPresentQueues(device, surface).Count() <= 0)
{
return(false);
}
// - We need at least a geometry shader support
if (!features.GeometryShader)
{
return(false);
}
return(true);
}
return(devices.Where(SuitabilityCriteria));
}