/// <summary>
/// Rebuilds the render target to use a new size.
/// </summary>
/// <param name="width">The new width of the render target.</param>
/// <param name="height">The new height of the render target.</param>
/// <param name="force">If <c>true</c>, the render target will be rebuilt even if the size doesnt change.</param>
public void Rebuild(uint width, uint height, bool force = false)
{
if (!force && width == Width && height == Height)
{
return;
}
Width = width;
Height = height;
// Destroy the existing objects, if needed
VkView?.Dispose();
VkImage?.Dispose();
VkMemory?.Dispose();
// Create the image
var ici = new Vk.ImageCreateInfo
{
ImageType = Vk.ImageType.Image2D,
Extent = new Vk.Extent3D((int)width, (int)height, 1),
MipLevels = 1,
ArrayLayers = 1,
Format = (Vk.Format)Format,
Tiling = Vk.ImageTiling.Optimal,
InitialLayout = Vk.ImageLayout.Undefined,
Usage = Vk.ImageUsages.Sampled | Vk.ImageUsages.TransferSrc | Vk.ImageUsages.TransferDst |
(HasDepth ? Vk.ImageUsages.DepthStencilAttachment : Vk.ImageUsages.ColorAttachment), // No subpassInput support yet, but add it here
SharingMode = Vk.SharingMode.Exclusive,
Samples = Vk.SampleCounts.Count1, // TODO: Change when we support multisampling
Flags = Vk.ImageCreateFlags.None
};
VkImage = Device.VkDevice.CreateImage(ici);
// Create the backing memory for the image
var memReq = VkImage.GetMemoryRequirements();
var memIdx = Device.FindMemoryTypeIndex(memReq.MemoryTypeBits, Vk.MemoryProperties.DeviceLocal);
if (memIdx == -1)
{
throw new InvalidOperationException("Cannot find a memory type that supports render targets (this means bad or out-of-date hardware)");
}
var mai = new Vk.MemoryAllocateInfo(memReq.Size, memIdx);
VkMemory = Device.VkDevice.AllocateMemory(mai);
DataSize = (uint)memReq.Size;
VkImage.BindMemory(VkMemory);
// Create the view
var vci = new Vk.ImageViewCreateInfo(
(Vk.Format)Format,
new Vk.ImageSubresourceRange(VkAspects, 0, 1, 0, 1),
viewType: Vk.ImageViewType.Image2D
);
VkView = VkImage.CreateView(vci);
// Make the initial layout transition
Device.SubmitScratchCommand(buf => {
buf.CmdPipelineBarrier(Vk.PipelineStages.AllGraphics, Vk.PipelineStages.AllGraphics, imageMemoryBarriers: new[] { new Vk.ImageMemoryBarrier(
VkImage, new Vk.ImageSubresourceRange(VkAspects, 0, 1, 0, 1), Vk.Accesses.None, Vk.Accesses.None,
Vk.ImageLayout.Undefined, DefaultImageLayout
) });
});
// Build the transitions
ClearBarrier = new Vk.ImageMemoryBarrier(
VkImage, new Vk.ImageSubresourceRange(VkAspects, 0, 1, 0, 1), Vk.Accesses.None, Vk.Accesses.None,
DefaultImageLayout, Vk.ImageLayout.TransferDstOptimal
);
AttachBarrier = new Vk.ImageMemoryBarrier(
VkImage, new Vk.ImageSubresourceRange(VkAspects, 0, 1, 0, 1), Vk.Accesses.None, Vk.Accesses.None,
Vk.ImageLayout.TransferDstOptimal, DefaultImageLayout
);
}
