/// <summary>
/// Release the memory from the VRAM.
/// </summary>
public void ReleaseMemory()
{
StagingBuffer?.Dispose();
StagingBuffer = null;
IndexBuffer?.Dispose();
IndexBuffer = null;
StagingVRAM?.Free();
VertexVRAM?.Free();
}
/// <summary>
/// Upload the vertexs to the VRAM.
/// </summary>
public void Upload(CommandBuffer commands, int maxBytes)
{
if (StagingVRAM != null && VertexVRAM != null && IndexBuffer != null && StagingBuffer != null)
{
List <BufferCopy> uploadQueue = new List <BufferCopy>();
// - Order invalidated chunks by priority
var invalidated = UsedSpace.Where(x => (x as BufferResource).Invalidated)
.OrderByDescending(x => (x as BufferResource).UploadPriority);
// - Keep track of the upload zone
var uploadRange = (start : 0L, end : 0L);
foreach (BufferResource chunk in invalidated)
{
if (chunk.UploadPriority == int.MaxValue || maxBytes > 0)
{
uploadQueue.Add(new BufferCopy(chunk.Offset, chunk.Offset, chunk.Size));
maxBytes -= (int)chunk.Size;
chunk.Invalidated = false;
chunk.UploadPriority = 0;
uploadRange =
(
start : Math.Min(uploadRange.start, chunk.Offset),
end : Math.Max(uploadRange.end, chunk.Offset + chunk.Size)
);
}
}
// - No invalidated chunks
if (uploadQueue.Count <= 0)
{
return;
}
// - Calculate upload range
int uploadOffset = (int)uploadRange.start;
int uploadSize = (int)(uploadRange.end - uploadRange.start);
// TODO: This can be improved by splitting large upload areas
// - Gets the pointer to the staging memory
IntPtr vram = StagingVRAM.Map(uploadOffset, uploadSize, MemoryMapFlags.None);
unsafe
{
// - Perform the copy
System.Buffer.MemoryCopy
(
IntPtr.Add(RawMemory, uploadOffset).ToPointer(),
vram.ToPointer(),
uploadSize, uploadSize
);
}
// - Unmap the staging memory pointer
StagingVRAM.Unmap();
// - Send the upload message to the GPU
commands.CopyBuffer(StagingBuffer, IndexBuffer, uploadQueue.ToArray());
}
}
