public static BufferWithMemory CreateBuffer(VkContext vulkan, Vk.DeviceSize size,
Vk.BufferUsageFlags usage, Vk.MemoryPropertyFlags memoryProps,
Vk.SharingMode sharingMode)
{
var bufferInfo = new Vk.BufferCreateInfo();
bufferInfo.Size = size;
bufferInfo.Usage = usage;
bufferInfo.SharingMode = sharingMode;
var container = new BufferWithMemory();
container.Buffer = vulkan.Device.CreateBuffer(bufferInfo);
var memoryReqs = vulkan.Device.GetBufferMemoryRequirements(container.Buffer);
var allocInfo = new Vk.MemoryAllocateInfo();
allocInfo.AllocationSize = memoryReqs.Size;
allocInfo.MemoryTypeIndex = FindMemoryType(memoryReqs.MemoryTypeBits,
vulkan.PhysicalDevice, memoryProps);
container.Memory = vulkan.Device.AllocateMemory(allocInfo);
container.Bind(vulkan.Device, 0);
return(container);
}
private void createIndexBuffer()
{
var size = Marshal.SizeOf(typeof(short)) * this.indices.Count;
var transferUsage = Vk.BufferUsageFlags.TransferSrc;
var indexUsage = Vk.BufferUsageFlags.IndexBuffer
| Vk.BufferUsageFlags.TransferDst;
var transferMemoryProps = Vk.MemoryPropertyFlags.DeviceLocal;
var indexMemoryProps = Vk.MemoryPropertyFlags.HostVisible
| Vk.MemoryPropertyFlags.HostCoherent;
var sharingMode = this.GetSharingMode();
BufferWithMemory stagingBuffer;
try {
stagingBuffer = VkHelper.CreateBuffer(this, size, transferUsage,
transferMemoryProps, sharingMode);
} catch (Vk.ResultException result) {
throw new VkException("An error occurred while creating the staging buffer.", result);
}
IntPtr memory = this.Device.MapMemory(stagingBuffer.Memory, 0, size);
var indexArray = this.indices.ToArray();
MemoryManagement.ArrayToPtr <short>(indexArray, memory, false);
this.Device.UnmapMemory(stagingBuffer.Memory);
try {
BufferWithMemory indexBuffer = VkHelper.CreateBuffer(this, size, indexUsage,
indexMemoryProps, sharingMode);
this.vkIndexBuffer = indexBuffer.Buffer;
this.vkIndexBufferMemory = indexBuffer.Memory;
} catch (Vk.ResultException result) {
throw new VkException("An error occurred while creating the index buffer.", result);
}
VkHelper.CopyBuffer(stagingBuffer.Buffer, this.vkIndexBuffer, size, this);
stagingBuffer.Destroy(this.Device);
}