/// <summary>
/// Construct a Graphics object belonging to a window
/// </summary>
/// <param name="window"></param>
public Graphics(WyvernWindow window)
{
// Argument checks
if (window is null)
{
throw new ArgumentNullException(nameof(window));
}
// Initialize the static part of Graphics if necessary
InitializeStatic();
// Store window
Window = window;
// Create window surface
{
AllocationCallbacks?allocationCallbacks = null;
Surface = new SurfaceKhr(
Instance,
ref allocationCallbacks,
VkGLFW3.VkGlfw.CreateWindowSurface(Instance.Handle, Window, IntPtr.Zero)
);
Surface.PrintDebug();
}
// Choose a physical device
{
PhysicalDevice = Instance.EnumeratePhysicalDevices()
.Where(e => GetDeviceMeetsRequirements(e, Surface))
.OrderByDescending(GetDeviceScore)
.FirstOrDefault();
if (PhysicalDevice is null)
{
throw new InvalidOperationException("No physical device found that meets the requirements for the application");
}
MemoryProperties = PhysicalDevice.GetMemoryProperties();
}
// Create default queue families
{
ComputeQueueFamily = new QueueFamily(
$"{Name}'s {nameof(ComputeQueueFamily)}", this, QueueFamily.QueueType.Compute, 2,
true, ComputeCommandPoolFlags
);
GraphicsQueueFamily = new QueueFamily(
$"{Name}'s {nameof(GraphicsQueueFamily)}", this, QueueFamily.QueueType.Graphics, 2,
true, GraphicsCommandPoolFlags
);
TransferQueueFamily = new QueueFamily(
$"{Name}'s {nameof(TransferQueueFamily)}", this, QueueFamily.QueueType.Transfer, 2,
true, TransferCommandPoolFlags
);
PresentQueueFamily = new QueueFamily(
$"{Name}'s {nameof(PresentQueueFamily)}", this, QueueFamily.QueueType.Present, 1,
false
);
}
// Create a logical device
{
// Generate queue create info structs
var queueCreateInfos = QueueFamilies.Select(queueFamily =>
{
// Generate queue priorities
var priorities = new float[queueFamily.Count];
for (var i = 0; i < priorities.Length; i++)
{
priorities[i] = 1f - (i / (float)(priorities.Length - 1));
}
// Create create info
var createInfo = new DeviceQueueCreateInfo()
{
QueueFamilyIndex = queueFamily.Index,
QueueCount = queueFamily.Count,
QueuePriorities = priorities
};
return(createInfo);
});
// Merge multiple queue families' queue create infos
{
var alreadyHave = new List <int>();
var uniqueCreateInfos = new List <DeviceQueueCreateInfo>();
foreach (var createInfo in queueCreateInfos.OrderByDescending(e => e.QueueCount))
{
if (!alreadyHave.Contains(createInfo.QueueFamilyIndex))
{
alreadyHave.Add(createInfo.QueueFamilyIndex);
uniqueCreateInfos.Add(createInfo);
}
}
queueCreateInfos = uniqueCreateInfos;
foreach (var createInfo in queueCreateInfos)
{
createInfo.PrintDebug();
}
}
// Create device
Device = PhysicalDevice.CreateDevice(new DeviceCreateInfo()
{
EnabledExtensionNames = EnabledDeviceExtensions.ToArray(),
QueueCreateInfos = queueCreateInfos.ToArray(),
EnabledFeatures = EnabledPhysicalDeviceFeatures
});
// Set the queues in the queue families, using those created with the device
foreach (var family in QueueFamilies)
{
var queues = new Queue[family.Count];
for (var i = 0; i < queues.Length; i++)
{
queues[i] = Device.GetQueue(family.Index, i);
}
family.SetQueues(queues);
}
// Create and set the command pools in the queue families
foreach (var family in QueueFamilies)
{
// Skip family that shouldn't have a command pool
if (!family.HasCommandPool)
{
continue;
}
// Create command pool
var commandPool = Device.CreateCommandPool(new CommandPoolCreateInfo()
{
QueueFamilyIndex = family.Index,
Flags = family.CommandPoolFlags
});
family.SetCommandPool(commandPool);
}
}
// Create swapchain
{
// Query supported capabilities and formats
var surfaceCapabilities = SurfaceCapabilities;
var surfaceFormats = SurfaceFormats;
var surfacePresentModes = SurfacePresentModes;
surfaceCapabilities.PrintDebug();
// Choose the best image format and color space
{
var imageFormat = Array.Find(
PreferredSwapchainFormats,
preferred => surfaceFormats.Any(available => available.Format == preferred)
);
if (imageFormat == Format.Undefined)
{
imageFormat = surfaceFormats.FirstOrDefault().Format;
}
if (imageFormat == Format.Undefined)
{
throw new InvalidOperationException("Surface somehow does not support any known image formats");
}
SwapchainImageFormat = imageFormat;
SwapchainColorSpace = surfaceFormats.First(e => e.Format == SwapchainImageFormat).ColorSpace;
}
// Choose the best present mode
{
var presentMode = Array.Find(
PreferredPresentModes,
preferred => surfacePresentModes.Any(available => available == preferred)
);
SwapchainPresentMode = presentMode;
}
// Create the swapchain
SwapchainExtent = surfaceCapabilities.CurrentExtent;
Swapchain = Device.CreateSwapchainKhr(new SwapchainCreateInfoKhr(
surface: Surface,
imageFormat: SwapchainImageFormat,
imageExtent: SwapchainExtent,
preTransform: surfaceCapabilities.CurrentTransform,
presentMode: SwapchainPresentMode,
minImageCount: SurfaceCapabilities.MinImageCount,
imageArrayLayers: SurfaceCapabilities.MaxImageArrayLayers,
imageSharingMode: SharingMode.Exclusive,
imageColorSpace: SwapchainColorSpace
));
SwapchainAttachmentImages = Swapchain.GetImages().Select(
e => new VKImage(
e, SwapchainImageFormat,
SwapchainExtent,
new ImageSubresourceRange(ImageAspects.Color, 0, 1, 0, 1)
)
).ToArray();
Swapchain.PrintDebug();
}
// Create semaphores & fences
{
// Image available semaphore
ImageAvailableSemaphore = Device.CreateSemaphore();
ReadyToPresentSemaphore = Device.CreateSemaphore();
// Swapchain image rendering fences
RenderToImageFences = new Fence[SwapchainAttachmentImages.Length];
for (var i = 0; i < RenderToImageFences.Length; i++)
{
RenderToImageFences[i] = Device.CreateFence(new FenceCreateInfo(flags: FenceCreateFlags.Signaled));
}
}
// Create content collection
{
Content = new ContentCollection(this);
}
// Misc
Stopwatch = Stopwatch.StartNew();
CurrentTime = 0.0;
}
/// <summary>
/// Get whether a physical device meets requirement features and capabilities
/// </summary>
/// <param name="device"></param>
/// <returns></returns>
private static bool GetDeviceMeetsRequirements(PhysicalDevice device, SurfaceKhr surface)
{
// Argument checks
if (device is null)
{
throw new ArgumentNullException(nameof(device));
}
if (surface is null)
{
throw new ArgumentNullException(nameof(surface));
}
// Check device features
{
var features = device.GetFeatures();
if (!features.SamplerAnisotropy)
{
return(false);
}
var limits = device.GetProperties().Limits;
if (limits.MaxVertexInputAttributes < 16)
{
return(false);
}
if (limits.MaxUniformBufferRange < sizeof(float) * 4 * 254)
{
return(false);
}
if (limits.MaxVertexInputBindings < 2)
{
return(false);
}
if (limits.MaxPointSize <= 1)
{
return(false);
}
}
// Check queue families
{
var families = device.GetQueueFamilyProperties();
// Graphics, compute, transfer
{
if (families.Count(family => QueueFamily.Supports(family, Queues.Graphics)) == 0 ||
families.Count(family => QueueFamily.Supports(family, Queues.Compute)) == 0 ||
families.Count(family => QueueFamily.Supports(family, Queues.Transfer)) == 0)
{
return(false);
}
}
// Present
{
var foundPresent = false;
for (var i = 0; i < families.Length; i++)
{
if (QueueFamily.SupportsPresenting(i, device, surface))
{
foundPresent = true;
break;
}
}
if (!foundPresent)
{
return(false);
}
}
}
return(true);
}
