private unsafe void CreateBackBuffers()
{
// Create the texture object
var backBufferDescription = new TextureDescription
{
ArraySize = 1,
Dimension = TextureDimension.Texture2D,
Height = Description.BackBufferHeight,
Width = Description.BackBufferWidth,
Depth = 1,
Flags = TextureFlags.RenderTarget,
Format = Description.BackBufferFormat,
MipLevels = 1,
MultiSampleLevel = MSAALevel.None,
Usage = GraphicsResourceUsage.Default
};
backbuffer.InitializeWithoutResources(backBufferDescription);
var createInfo = new ImageViewCreateInfo
{
StructureType = StructureType.ImageViewCreateInfo,
SubresourceRange = new ImageSubresourceRange(ImageAspectFlags.Color, 0, 1, 0, 1),
Format = backbuffer.NativeFormat,
};
// We initialize swapchain images to PresentSource, since we swap them out while in this layout.
backbuffer.NativeAccessMask = AccessFlags.MemoryRead;
backbuffer.NativeLayout = ImageLayout.PresentSource;
var imageMemoryBarrier = new ImageMemoryBarrier
{
StructureType = StructureType.ImageMemoryBarrier,
SubresourceRange = new ImageSubresourceRange(ImageAspectFlags.Color, 0, 1, 0, 1),
OldLayout = ImageLayout.Undefined,
NewLayout = ImageLayout.PresentSource,
SourceAccessMask = AccessFlags.None,
DestinationAccessMask = AccessFlags.MemoryRead
};
var commandBuffer = GraphicsDevice.NativeCopyCommandBuffer;
var beginInfo = new CommandBufferBeginInfo {
StructureType = StructureType.CommandBufferBeginInfo
};
commandBuffer.Begin(ref beginInfo);
var buffers = GraphicsDevice.NativeDevice.GetSwapchainImages(swapChain);
swapchainImages = new SwapChainImageInfo[buffers.Length];
for (int i = 0; i < buffers.Length; i++)
{
// Create image views
swapchainImages[i].NativeImage = createInfo.Image = buffers[i];
swapchainImages[i].NativeColorAttachmentView = GraphicsDevice.NativeDevice.CreateImageView(ref createInfo);
// Transition to default layout
imageMemoryBarrier.Image = buffers[i];
commandBuffer.PipelineBarrier(PipelineStageFlags.AllCommands, PipelineStageFlags.AllCommands, DependencyFlags.None, 0, null, 0, null, 1, &imageMemoryBarrier);
}
// Close and submit
commandBuffer.End();
var submitInfo = new SubmitInfo
{
StructureType = StructureType.SubmitInfo,
CommandBufferCount = 1,
CommandBuffers = new IntPtr(&commandBuffer),
};
GraphicsDevice.NativeCommandQueue.Submit(1, &submitInfo, Fence.Null);
GraphicsDevice.NativeCommandQueue.WaitIdle();
commandBuffer.Reset(CommandBufferResetFlags.None);
// Get next image
currentBufferIndex = GraphicsDevice.NativeDevice.AcquireNextImage(swapChain, ulong.MaxValue, GraphicsDevice.GetNextPresentSemaphore(), Fence.Null);
// Apply the first swap chain image to the texture
backbuffer.SetNativeHandles(swapchainImages[currentBufferIndex].NativeImage, swapchainImages[currentBufferIndex].NativeColorAttachmentView);
}