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using Ryujinx.Graphics.GAL;
using Silk.NET.Vulkan;
using System;
using System.Runtime.CompilerServices;
namespace Ryujinx.Graphics.Vulkan
{
class DescriptorSetTemplate : IDisposable
{
private readonly VulkanRenderer _gd;
private readonly Device _device;
public readonly DescriptorUpdateTemplate Template;
public readonly int Size;
public unsafe DescriptorSetTemplate(VulkanRenderer gd, Device device, ResourceBindingSegment[] segments, PipelineLayoutCacheEntry plce, PipelineBindPoint pbp, int setIndex)
{
_gd = gd;
_device = device;
// Create a template from the set usages. Assumes the descriptor set is updated in segment order then binding order.
DescriptorUpdateTemplateEntry* entries = stackalloc DescriptorUpdateTemplateEntry[segments.Length];
nuint structureOffset = 0;
for (int seg = 0; seg < segments.Length; seg++)
{
ResourceBindingSegment segment = segments[seg];
int binding = segment.Binding;
int count = segment.Count;
if (setIndex == PipelineBase.UniformSetIndex)
{
entries[seg] = new DescriptorUpdateTemplateEntry()
{
DescriptorType = DescriptorType.UniformBuffer,
DstBinding = (uint)binding,
DescriptorCount = (uint)count,
Offset = structureOffset,
Stride = (nuint)Unsafe.SizeOf<DescriptorBufferInfo>()
};
structureOffset += (nuint)(Unsafe.SizeOf<DescriptorBufferInfo>() * count);
}
else if (setIndex == PipelineBase.StorageSetIndex)
{
entries[seg] = new DescriptorUpdateTemplateEntry()
{
DescriptorType = DescriptorType.StorageBuffer,
DstBinding = (uint)binding,
DescriptorCount = (uint)count,
Offset = structureOffset,
Stride = (nuint)Unsafe.SizeOf<DescriptorBufferInfo>()
};
structureOffset += (nuint)(Unsafe.SizeOf<DescriptorBufferInfo>() * count);
}
else if (setIndex == PipelineBase.TextureSetIndex)
{
if (segment.Type != ResourceType.BufferTexture)
{
entries[seg] = new DescriptorUpdateTemplateEntry()
{
DescriptorType = DescriptorType.CombinedImageSampler,
DstBinding = (uint)binding,
DescriptorCount = (uint)count,
Offset = structureOffset,
Stride = (nuint)Unsafe.SizeOf<DescriptorImageInfo>()
};
structureOffset += (nuint)(Unsafe.SizeOf<DescriptorImageInfo>() * count);
}
else
{
entries[seg] = new DescriptorUpdateTemplateEntry()
{
DescriptorType = DescriptorType.UniformTexelBuffer,
DstBinding = (uint)binding,
DescriptorCount = (uint)count,
Offset = structureOffset,
Stride = (nuint)Unsafe.SizeOf<BufferView>()
};
structureOffset += (nuint)(Unsafe.SizeOf<BufferView>() * count);
}
}
else if (setIndex == PipelineBase.ImageSetIndex)
{
if (segment.Type != ResourceType.BufferImage)
{
entries[seg] = new DescriptorUpdateTemplateEntry()
{
DescriptorType = DescriptorType.StorageImage,
DstBinding = (uint)binding,
DescriptorCount = (uint)count,
Offset = structureOffset,
Stride = (nuint)Unsafe.SizeOf<DescriptorImageInfo>()
};
structureOffset += (nuint)(Unsafe.SizeOf<DescriptorImageInfo>() * count);
}
else
{
entries[seg] = new DescriptorUpdateTemplateEntry()
{
DescriptorType = DescriptorType.StorageTexelBuffer,
DstBinding = (uint)binding,
DescriptorCount = (uint)count,
Offset = structureOffset,
Stride = (nuint)Unsafe.SizeOf<BufferView>()
};
structureOffset += (nuint)(Unsafe.SizeOf<BufferView>() * count);
}
}
}
Size = (int)structureOffset;
var info = new DescriptorUpdateTemplateCreateInfo()
{
SType = StructureType.DescriptorUpdateTemplateCreateInfo,
DescriptorUpdateEntryCount = (uint)segments.Length,
PDescriptorUpdateEntries = entries,
TemplateType = DescriptorUpdateTemplateType.DescriptorSet,
DescriptorSetLayout = plce.DescriptorSetLayouts[setIndex],
PipelineBindPoint = pbp,
PipelineLayout = plce.PipelineLayout,
Set = (uint)setIndex,
};
DescriptorUpdateTemplate result;
gd.Api.CreateDescriptorUpdateTemplate(device, &info, null, &result).ThrowOnError();
Template = result;
}
public unsafe void Dispose()
{
_gd.Api.DestroyDescriptorUpdateTemplate(_device, Template, null);
}
}
}
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