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using System;
namespace Ryujinx.Graphics.Vulkan
{
struct BufferState : IDisposable
{
public static BufferState Null => new(null, 0, 0);
private readonly int _offset;
private readonly int _size;
private Auto<DisposableBuffer> _buffer;
public BufferState(Auto<DisposableBuffer> buffer, int offset, int size)
{
_buffer = buffer;
_offset = offset;
_size = size;
buffer?.IncrementReferenceCount();
}
public readonly void BindTransformFeedbackBuffer(VulkanRenderer gd, CommandBufferScoped cbs, uint binding)
{
if (_buffer != null)
{
var buffer = _buffer.Get(cbs, _offset, _size, true).Value;
ulong offset = (ulong)_offset;
ulong size = (ulong)_size;
gd.TransformFeedbackApi.CmdBindTransformFeedbackBuffers(cbs.CommandBuffer, binding, 1, in buffer, in offset, in size);
}
}
public void Swap(Auto<DisposableBuffer> from, Auto<DisposableBuffer> to)
{
if (_buffer == from)
{
_buffer.DecrementReferenceCount();
to.IncrementReferenceCount();
_buffer = to;
}
}
public readonly bool Overlaps(Auto<DisposableBuffer> buffer, int offset, int size)
{
return buffer == _buffer && offset < _offset + _size && offset + size > _offset;
}
public readonly void Dispose()
{
_buffer?.DecrementReferenceCount();
}
}
}
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