private static void CreateBuffer(ulong size, ResourceType type, out VkBuffer buffer, out MemoryAllocation memory)
{
var gd = Core.Instance !.Graphics;
// Create buffer handle
VkBufferCreateInfo bci = new(
flags : VkBufferCreateFlags.NoFlags,
size : size,
usage : GetUsageFlags(type),
sharingMode : VkSharingMode.Exclusive
);
VulkanHandle <VkBuffer> handle;
gd.VkDevice.CreateBuffer(&bci, null, &handle)
.Throw("Failed to create buffer handle");
buffer = new(handle, gd.VkDevice);
// Allocate and bind buffer memory
VkMemoryRequirements memreq;
buffer.GetBufferMemoryRequirements(&memreq);
memory = gd.Memory.AllocateDevice(memreq) ??
throw new Exception("Failed to allocate memory for buffer");
buffer.BindBufferMemory(memory.Handle, memory.Offset);
}
internal bool CanDestroyImmediately = false; // Default to normal delayed-destroy
#endregion // Fields
/// <summary>
/// Create and map a new host buffer with the given size in bytes.
/// </summary>
/// <param name="size">The buffer size, in bytes.</param>
public HostBuffer(ulong size)
: base(ResourceType.HostBuffer)
{
DataSize = size;
// Create buffer
VkBufferCreateInfo bci = new(
flags : VkBufferCreateFlags.NoFlags,
size : size,
usage : VkBufferUsageFlags.TransferDst | VkBufferUsageFlags.TransferSrc,
sharingMode : VkSharingMode.Exclusive
);
VulkanHandle <VkBuffer> handle;
Graphics.VkDevice.CreateBuffer(&bci, null, &handle).Throw("Failed to create host buffer");
Buffer = new(handle, Graphics.VkDevice);
// Allocate/bind memory
VkMemoryRequirements memreq;
Buffer.GetBufferMemoryRequirements(&memreq);
Memory = Graphics.Memory.AllocateUpload(memreq) ??
throw new Exception("Failed to allocate host buffer memory");
Buffer.BindBufferMemory(Memory.Handle, Memory.Offset);
// Map memory
Memory.Map();
_stream = new((byte *)Memory.DataPtr, 0, (long)DataSize, FileAccess.Write);
}
public UniformPushBuffer(ulong size)
{
var gd = Core.Instance !.Graphics;
Alignment = gd.VkDeviceInfo.Properties.Limits.MinUniformBufferOffsetAlignment;
// Calculate size requirements
FrameSize = MathHelper.RoundUp(size, Alignment);
FrameAlignment = FrameSize + PADDING;
TotalSize = FrameAlignment * GraphicsDevice.MAX_PARALLEL_FRAMES;
// Create the buffer
VkBufferCreateInfo bci = new(
flags : VkBufferCreateFlags.NoFlags,
size : TotalSize,
usage : VkBufferUsageFlags.UniformBuffer,
sharingMode : VkSharingMode.Exclusive,
queueFamilyIndexCount : 0,
queueFamilyIndices : null
);
VulkanHandle <VkBuffer> handle;
gd.VkDevice.CreateBuffer(&bci, null, &handle).Throw("Failed to create uniform push buffer");
Handle = new(handle, gd.VkDevice);
// Allocate and bind buffer memory
VkMemoryRequirements memreq;
Handle.GetBufferMemoryRequirements(&memreq);
Memory = gd.Memory.AllocateDynamic(memreq) ??
throw new Exception("Failed to allocate uniform push buffer memory");
Handle.BindBufferMemory(Memory.Handle, Memory.Offset)
.Throw("Failed to bind uniform push buffer memory");
// Map memory
DataPtr = (byte *)Memory.Map();
}