/**
* Create the swapchain and get it's Images with given width and height
*
* @param width Pointer to the width of the swapchain (may be adjusted to fit the requirements of the swapchain)
* @param height Pointer to the height of the swapchain (may be adjusted to fit the requirements of the swapchain)
* @param vsync (Optional) Can be used to force vsync'd rendering (by using VK_PRESENT_MODE_FIFO_KHR as presentation mode)
*/
public unsafe void Create(ref uint width, ref uint height, bool vsync = false)
{
VkResult err;
VkSwapchainKHR oldSwapchain = swapchain;
// Get physical Device Surface properties and formats
VkSurfaceCapabilitiesKHR surfCaps;
err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(Device.PhysicalDevice, Surface, out surfCaps);
Debug.Assert(err == VkResult.Success);
// Get available present modes
uint presentModeCount;
err = vkGetPhysicalDeviceSurfacePresentModesKHR(Device.PhysicalDevice, Surface, &presentModeCount, null);
Debug.Assert(err == VkResult.Success);
Debug.Assert(presentModeCount > 0);
using (Vector <VkPresentModeKHR> presentModes = new Vector <VkPresentModeKHR>(presentModeCount))
{
err = vkGetPhysicalDeviceSurfacePresentModesKHR(Device.PhysicalDevice, Surface, &presentModeCount, (VkPresentModeKHR *)presentModes.Data);
Debug.Assert(err == VkResult.Success);
presentModes.Count = presentModeCount;
// If width (and height) equals the special value 0xFFFFFFFF, the size of the Surface will be set by the swapchain
if (surfCaps.currentExtent.width != unchecked ((uint)-1))
{
width = surfCaps.currentExtent.width;
height = surfCaps.currentExtent.height;
}
extent = new VkExtent3D(width, height, 1);
// Select a present mode for the swapchain
// The VK_PRESENT_MODE_FIFO_KHR mode must always be present as per spec
// This mode waits for the vertical blank ("v-sync")
VkPresentModeKHR swapchainPresentMode = VkPresentModeKHR.Fifo;
// If v-sync is not requested, try to find a mailbox mode
// It's the lowest latency non-tearing present mode available
if (!vsync)
{
for (uint i = 0; i < presentModeCount; i++)
{
if (presentModes[i] == VkPresentModeKHR.Mailbox)
{
swapchainPresentMode = VkPresentModeKHR.Mailbox;
break;
}
if ((swapchainPresentMode != VkPresentModeKHR.Mailbox) && (presentModes[i] == VkPresentModeKHR.Immediate))
{
swapchainPresentMode = VkPresentModeKHR.Immediate;
}
}
}
// Determine the number of Images
uint desiredNumberOfSwapchainImages = IMAGE_COUNT;// surfCaps.minImageCount + 1;
if ((surfCaps.maxImageCount > 0) && (desiredNumberOfSwapchainImages > surfCaps.maxImageCount))
{
Debug.Assert(false);
desiredNumberOfSwapchainImages = surfCaps.maxImageCount;
}
// Find the transformation of the Surface
VkSurfaceTransformFlagsKHR preTransform;
if ((surfCaps.supportedTransforms & VkSurfaceTransformFlagsKHR.Identity) != 0)
{
// We prefer a non-rotated transform
preTransform = VkSurfaceTransformFlagsKHR.Identity;
}
else
{
preTransform = surfCaps.currentTransform;
}
VkSwapchainCreateInfoKHR swapchainCI = new VkSwapchainCreateInfoKHR
{
sType = VkStructureType.SwapchainCreateInfoKHR,
pNext = null,
surface = Surface,
minImageCount = desiredNumberOfSwapchainImages,
imageFormat = ColorFormat,
imageColorSpace = ColorSpace,
imageExtent = new VkExtent2D(extent.width, extent.height),
imageUsage = VkImageUsageFlags.ColorAttachment,
preTransform = preTransform,
imageArrayLayers = 1,
imageSharingMode = VkSharingMode.Exclusive,
queueFamilyIndexCount = 0,
pQueueFamilyIndices = null,
presentMode = swapchainPresentMode,
oldSwapchain = oldSwapchain,
// Setting clipped to VK_TRUE allows the implementation to discard rendering outside of the Surface area
clipped = true,
compositeAlpha = VkCompositeAlphaFlagsKHR.Opaque
};
// Set additional usage flag for blitting from the swapchain Images if supported
Device.GetPhysicalDeviceFormatProperties(ColorFormat, out VkFormatProperties formatProps);
if ((formatProps.optimalTilingFeatures & VkFormatFeatureFlags.BlitDst) != 0)
{
swapchainCI.imageUsage |= VkImageUsageFlags.TransferSrc;
}
swapchain = Device.CreateSwapchainKHR(ref swapchainCI);
// If an existing swap chain is re-created, destroy the old swap chain
// This also cleans up all the presentable Images
if (oldSwapchain.Handle != 0)
{
for (uint i = 0; i < ImageCount; i++)
{
ImageViews[i].Dispose();
}
Device.DestroySwapchainKHR(oldSwapchain);
}
var vkImages = Vulkan.vkGetSwapchainImagesKHR(Device.Handle, swapchain);
VkImages.Clear();
Images = new Image[vkImages.Length];
ImageViews = new ImageView[vkImages.Length];
for (int i = 0; i < vkImages.Length; i++)
{
Images[i] = new Image(vkImages[i])
{
imageType = VkImageType.Image2D,
extent = extent
};
ImageViews[i] = ImageView.Create(Images[i], VkImageViewType.Image2D, ColorFormat, VkImageAspectFlags.Color, 0, 1);
}
// Get the swap chain Images
VkImages.Add(vkImages);
}
}
