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using Ryujinx.Graphics.GAL;
using IndexType = Silk.NET.Vulkan.IndexType;
namespace Ryujinx.Graphics.Vulkan
{
internal struct IndexBufferState
{
private const int IndexBufferMaxMirrorable = 0x20000;
public static IndexBufferState Null => new(BufferHandle.Null, 0, 0);
private readonly int _offset;
private readonly int _size;
private readonly IndexType _type;
private readonly BufferHandle _handle;
private Auto<DisposableBuffer> _buffer;
public IndexBufferState(BufferHandle handle, int offset, int size, IndexType type)
{
_handle = handle;
_offset = offset;
_size = size;
_type = type;
_buffer = null;
}
public IndexBufferState(BufferHandle handle, int offset, int size)
{
_handle = handle;
_offset = offset;
_size = size;
_type = IndexType.Uint16;
_buffer = null;
}
public void BindIndexBuffer(VulkanRenderer gd, CommandBufferScoped cbs)
{
Auto<DisposableBuffer> autoBuffer;
int offset, size;
IndexType type = _type;
bool mirrorable = false;
if (_type == IndexType.Uint8Ext && !gd.Capabilities.SupportsIndexTypeUint8)
{
// Index type is not supported. Convert to I16.
autoBuffer = gd.BufferManager.GetBufferI8ToI16(cbs, _handle, _offset, _size);
type = IndexType.Uint16;
offset = 0;
size = _size * 2;
}
else
{
autoBuffer = gd.BufferManager.GetBuffer(cbs.CommandBuffer, _handle, false, out int bufferSize);
if (_offset >= bufferSize)
{
autoBuffer = null;
}
mirrorable = _size < IndexBufferMaxMirrorable;
offset = _offset;
size = _size;
}
_buffer = autoBuffer;
if (autoBuffer != null)
{
DisposableBuffer buffer = mirrorable ? autoBuffer.GetMirrorable(cbs, ref offset, size, out _) : autoBuffer.Get(cbs, offset, size);
gd.Api.CmdBindIndexBuffer(cbs.CommandBuffer, buffer.Value, (ulong)offset, type);
}
}
public void BindConvertedIndexBuffer(
VulkanRenderer gd,
CommandBufferScoped cbs,
int firstIndex,
int indexCount,
int convertedCount,
IndexBufferPattern pattern)
{
Auto<DisposableBuffer> autoBuffer;
// Convert the index buffer using the given pattern.
int indexSize = GetIndexSize();
int firstIndexOffset = firstIndex * indexSize;
autoBuffer = gd.BufferManager.GetBufferTopologyConversion(cbs, _handle, _offset + firstIndexOffset, indexCount * indexSize, pattern, indexSize);
int size = convertedCount * 4;
_buffer = autoBuffer;
if (autoBuffer != null)
{
gd.Api.CmdBindIndexBuffer(cbs.CommandBuffer, autoBuffer.Get(cbs, 0, size).Value, 0, IndexType.Uint32);
}
}
public Auto<DisposableBuffer> BindConvertedIndexBufferIndirect(
VulkanRenderer gd,
CommandBufferScoped cbs,
BufferRange indirectBuffer,
BufferRange drawCountBuffer,
IndexBufferPattern pattern,
bool hasDrawCount,
int maxDrawCount,
int indirectDataStride)
{
// Convert the index buffer using the given pattern.
int indexSize = GetIndexSize();
(var indexBufferAuto, var indirectBufferAuto) = gd.BufferManager.GetBufferTopologyConversionIndirect(
gd,
cbs,
new BufferRange(_handle, _offset, _size),
indirectBuffer,
drawCountBuffer,
pattern,
indexSize,
hasDrawCount,
maxDrawCount,
indirectDataStride);
int convertedCount = pattern.GetConvertedCount(_size / indexSize);
int size = convertedCount * 4;
_buffer = indexBufferAuto;
if (indexBufferAuto != null)
{
gd.Api.CmdBindIndexBuffer(cbs.CommandBuffer, indexBufferAuto.Get(cbs, 0, size).Value, 0, IndexType.Uint32);
}
return indirectBufferAuto;
}
private readonly int GetIndexSize()
{
return _type switch
{
IndexType.Uint32 => 4,
IndexType.Uint16 => 2,
_ => 1,
};
}
public readonly bool BoundEquals(Auto<DisposableBuffer> buffer)
{
return _buffer == buffer;
}
public void Swap(Auto<DisposableBuffer> from, Auto<DisposableBuffer> to)
{
if (_buffer == from)
{
_buffer = to;
}
}
public readonly bool Overlaps(Auto<DisposableBuffer> buffer, int offset, int size)
{
return buffer == _buffer && offset < _offset + _size && offset + size > _offset;
}
}
}
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