// Size in bytes, and the usages
private protected Buffer(uint size, BufferType type, Vk.BufferUsages usages)
{
Device = SpectrumApp.Instance.GraphicsDevice;
Size = size;
Type = type;
// Create the buffer
var bci = new Vk.BufferCreateInfo(
size,
Vk.BufferUsages.TransferDst | Vk.BufferUsages.TransferSrc | usages,
flags: Vk.BufferCreateFlags.None,
sharingMode: Vk.SharingMode.Exclusive
);
VkBuffer = Device.VkDevice.CreateBuffer(bci);
// Create the backing memory
var memReq = VkBuffer.GetMemoryRequirements();
var memIdx = Device.FindMemoryTypeIndex(memReq.MemoryTypeBits, Vk.MemoryProperties.DeviceLocal);
if (memIdx == -1)
{
throw new InvalidOperationException("Cannot find a memory type that supports buffers (this means bad or out-of-date hardware)");
}
var mai = new Vk.MemoryAllocateInfo(memReq.Size, memIdx);
VkMemory = Device.VkDevice.AllocateMemory(mai);
VkBuffer.BindMemory(VkMemory);
}
internal Buffer(Device parent, ref BufferCreateInfo createInfo, ref AllocationCallbacks?allocator)
{
Parent = parent;
Allocator = allocator;
fixed(int *queueFamilies = createInfo.QueueFamilyIndices)
{
createInfo.ToNative(out BufferCreateInfo.Native nativeCreateInfo, queueFamilies);
long handle;
Result result = vkCreateBuffer(
parent,
&nativeCreateInfo,
NativeAllocator,
&handle);
VulkanException.ThrowForInvalidResult(result);
Handle = handle;
}
}
/// <summary>
/// Create a new buffer object.
/// </summary>
/// <param name="createInfo">
/// The structure containing parameters affecting creation of the buffer.
/// </param>
/// <param name="allocator">Controls host memory allocation.</param>
/// <returns>Buffer object.</returns>
/// <exception cref="VulkanException">Vulkan returns an error code.</exception>
public Buffer CreateBuffer(BufferCreateInfo createInfo, AllocationCallbacks?allocator = null)
{
return(new Buffer(this, ref createInfo, ref allocator));
}