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using Ryujinx.Common;
using Silk.NET.Vulkan;
using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
namespace Ryujinx.Graphics.Vulkan
{
ref struct DescriptorSetTemplateWriter
{
private Span<byte> _data;
public DescriptorSetTemplateWriter(Span<byte> data)
{
_data = data;
}
public void Push<T>(ReadOnlySpan<T> values) where T : unmanaged
{
Span<T> target = MemoryMarshal.Cast<byte, T>(_data);
values.CopyTo(target);
_data = _data[(Unsafe.SizeOf<T>() * values.Length)..];
}
}
unsafe class DescriptorSetTemplateUpdater : IDisposable
{
private const int SizeGranularity = 512;
private DescriptorSetTemplate _activeTemplate;
private NativeArray<byte> _data;
private void EnsureSize(int size)
{
if (_data == null || _data.Length < size)
{
_data?.Dispose();
int dataSize = BitUtils.AlignUp(size, SizeGranularity);
_data = new NativeArray<byte>(dataSize);
}
}
public DescriptorSetTemplateWriter Begin(DescriptorSetTemplate template)
{
_activeTemplate = template;
EnsureSize(template.Size);
return new DescriptorSetTemplateWriter(new Span<byte>(_data.Pointer, template.Size));
}
public DescriptorSetTemplateWriter Begin(int maxSize)
{
EnsureSize(maxSize);
return new DescriptorSetTemplateWriter(new Span<byte>(_data.Pointer, maxSize));
}
public void Commit(VulkanRenderer gd, Device device, DescriptorSet set)
{
gd.Api.UpdateDescriptorSetWithTemplate(device, set, _activeTemplate.Template, _data.Pointer);
}
public void CommitPushDescriptor(VulkanRenderer gd, CommandBufferScoped cbs, DescriptorSetTemplate template, PipelineLayout layout)
{
gd.PushDescriptorApi.CmdPushDescriptorSetWithTemplate(cbs.CommandBuffer, template.Template, layout, 0, _data.Pointer);
}
public void Dispose()
{
_data?.Dispose();
}
}
}
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