void initUISurface()
{
iFace.surf?.Dispose();
uiImage?.Dispose();
uiImage = new Image(dev, VkFormat.B8g8r8a8Unorm, VkImageUsageFlags.Sampled,
VkMemoryPropertyFlags.HostVisible | VkMemoryPropertyFlags.HostCoherent, Width, Height, VkImageType.Image2D,
VkSampleCountFlags.SampleCount1, VkImageTiling.Linear);
uiImage.CreateView(VkImageViewType.ImageView2D, VkImageAspectFlags.Color);
uiImage.CreateSampler(VkFilter.Nearest, VkFilter.Nearest, VkSamplerMipmapMode.Nearest, VkSamplerAddressMode.ClampToBorder);
uiImage.Descriptor.imageLayout = VkImageLayout.ShaderReadOnlyOptimal;
uiImage.Map();
CommandBuffer cmd = cmdPool.AllocateAndStart(VkCommandBufferUsageFlags.OneTimeSubmit);
uiImage.SetLayout(cmd, VkImageAspectFlags.Color,
VkImageLayout.Undefined, VkImageLayout.ShaderReadOnlyOptimal);
presentQueue.EndSubmitAndWait(cmd, true);
NotifyValueChanged("uiImage", uiImage);
uiImageUpdate?.Write(dev, uiImage.Descriptor);
iFace.surf = new Crow.Cairo.ImageSurface(uiImage.MappedData, Crow.Cairo.Format.ARGB32,
(int)Width, (int)Height, (int)uiImage.GetSubresourceLayout().rowPitch);
}