private unsafe void CreateBuffers()
{
PositionColorVertex[] positionData = VertexData.IndexedCubeData;
ushort[] indexData = VertexData.CubeIndexData;
InstanceData[] instanceData = new InstanceData[]
{
new InstanceData(new Vector3(0, 0, 0)),
new InstanceData(new Vector3(2, 0, 0)),
new InstanceData(new Vector3(-2, 0, 0))
};
CreateHostBufferWithContent <PositionColorVertex>(positionData, out var hostBuffer1, out var hostAlloc1);
CreateHostBufferWithContent <ushort>(indexData, out var hostBuffer2, out var hostAlloc2);
CreateHostBufferWithContent <InstanceData>(instanceData, out var hostBuffer3, out var hostAlloc3);
CreateDeviceLocalBuffer(BufferUsageFlags.BufferUsageVertexBufferBit, GetByteLength(positionData), out this.VertexBuffer, out this.VertexAllocation);
CreateDeviceLocalBuffer(BufferUsageFlags.BufferUsageIndexBufferBit, GetByteLength(indexData), out this.IndexBuffer, out this.IndexAllocation);
CreateDeviceLocalBuffer(BufferUsageFlags.BufferUsageVertexBufferBit, GetByteLength(instanceData), out this.InstanceBuffer, out this.InstanceAllocation);
var cbuffer = AllocateCommandBuffer(CommandBufferLevel.Primary);
BufferCopy *copies = stackalloc BufferCopy[1];
BeginCommandBuffer(cbuffer, CommandBufferUsageFlags.CommandBufferUsageOneTimeSubmitBit);
copies[0] = new BufferCopy(0, 0, (ulong)GetByteLength(positionData));
VkApi.CmdCopyBuffer(cbuffer, hostBuffer1, this.VertexBuffer, 1, copies);
copies[0] = new BufferCopy(0, 0, (ulong)GetByteLength(indexData));
VkApi.CmdCopyBuffer(cbuffer, hostBuffer2, this.IndexBuffer, 1, copies);
copies[0] = new BufferCopy(0, 0, (ulong)GetByteLength(instanceData));
VkApi.CmdCopyBuffer(cbuffer, hostBuffer3, this.InstanceBuffer, 1, copies);
EndCommandBuffer(cbuffer);
var subInfo = new SubmitInfo(commandBufferCount: 1, pCommandBuffers: &cbuffer);
var fence = CreateFence();
var res = VkApi.QueueSubmit(GraphicsQueue, 1, &subInfo, fence);
if (res != Result.Success)
{
throw new Exception("Unable to submit to queue. " + res);
}
var bufferTmp = cbuffer; //Allows the capture of this command buffer in a lambda
BufferCopyPromise = this.scheduler.WaitForFenceAsync(fence);
BufferCopyPromise.GetAwaiter().OnCompleted(() =>
{
VkApi.DestroyFence(Device, fence, null);
FreeCommandBuffer(bufferTmp);
VkApi.DestroyBuffer(Device, hostBuffer1, null);
VkApi.DestroyBuffer(Device, hostBuffer2, null);
VkApi.DestroyBuffer(Device, hostBuffer3, null);
hostAlloc1.Dispose();
hostAlloc2.Dispose();
hostAlloc3.Dispose();
});
this.VertexCount = (uint)positionData.Length;
this.IndexCount = (uint)indexData.Length;
this.InstanceCount = (uint)instanceData.Length;
}