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using Ryujinx.Graphics.GAL;
namespace Ryujinx.Graphics.Vulkan
{
internal struct VertexBufferState
{
private const int VertexBufferMaxMirrorable = 0x20000;
public static VertexBufferState Null => new(null, 0, 0, 0);
private readonly int _offset;
private readonly int _size;
private readonly int _stride;
private readonly BufferHandle _handle;
private Auto<DisposableBuffer> _buffer;
internal readonly int DescriptorIndex;
internal int AttributeScalarAlignment;
public VertexBufferState(Auto<DisposableBuffer> buffer, int descriptorIndex, int offset, int size, int stride = 0)
{
_buffer = buffer;
_handle = BufferHandle.Null;
_offset = offset;
_size = size;
_stride = stride;
DescriptorIndex = descriptorIndex;
AttributeScalarAlignment = 1;
buffer?.IncrementReferenceCount();
}
public VertexBufferState(BufferHandle handle, int descriptorIndex, int offset, int size, int stride = 0)
{
// This buffer state may be rewritten at bind time, so it must be retrieved on bind.
_buffer = null;
_handle = handle;
_offset = offset;
_size = size;
_stride = stride;
DescriptorIndex = descriptorIndex;
AttributeScalarAlignment = 1;
}
public void BindVertexBuffer(VulkanRenderer gd, CommandBufferScoped cbs, uint binding, ref PipelineState state, VertexBufferUpdater updater)
{
var autoBuffer = _buffer;
if (_handle != BufferHandle.Null)
{
// May need to restride the vertex buffer.
if (gd.NeedsVertexBufferAlignment(AttributeScalarAlignment, out int alignment) && (_stride % alignment) != 0)
{
autoBuffer = gd.BufferManager.GetAlignedVertexBuffer(cbs, _handle, _offset, _size, _stride, alignment);
if (autoBuffer != null)
{
int stride = (_stride + (alignment - 1)) & -alignment;
int newSize = (_size / _stride) * stride;
var buffer = autoBuffer.Get(cbs, 0, newSize).Value;
updater.BindVertexBuffer(cbs, binding, buffer, 0, (ulong)newSize, (ulong)stride);
_buffer = autoBuffer;
state.Internal.VertexBindingDescriptions[DescriptorIndex].Stride = (uint)stride;
}
return;
}
autoBuffer = gd.BufferManager.GetBuffer(cbs.CommandBuffer, _handle, false, out int size);
// The original stride must be reapplied in case it was rewritten.
state.Internal.VertexBindingDescriptions[DescriptorIndex].Stride = (uint)_stride;
if (_offset >= size)
{
autoBuffer = null;
}
}
if (autoBuffer != null)
{
int offset = _offset;
bool mirrorable = _size <= VertexBufferMaxMirrorable;
var buffer = mirrorable ? autoBuffer.GetMirrorable(cbs, ref offset, _size, out _).Value : autoBuffer.Get(cbs, offset, _size).Value;
updater.BindVertexBuffer(cbs, binding, buffer, (ulong)offset, (ulong)_size, (ulong)_stride);
}
}
public readonly bool BoundEquals(Auto<DisposableBuffer> buffer)
{
return _buffer == buffer;
}
public readonly bool Overlaps(Auto<DisposableBuffer> buffer, int offset, int size)
{
return buffer == _buffer && offset < _offset + _size && offset + size > _offset;
}
public readonly bool Matches(Auto<DisposableBuffer> buffer, int descriptorIndex, int offset, int size, int stride = 0)
{
return _buffer == buffer && DescriptorIndex == descriptorIndex && _offset == offset && _size == size && _stride == stride;
}
public void Swap(Auto<DisposableBuffer> from, Auto<DisposableBuffer> to)
{
if (_buffer == from)
{
_buffer.DecrementReferenceCount();
to.IncrementReferenceCount();
_buffer = to;
}
}
public readonly void Dispose()
{
// Only dispose if this buffer is not refetched on each bind.
if (_handle == BufferHandle.Null)
{
_buffer?.DecrementReferenceCount();
}
}
}
}
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