private DescriptorSet(GraphicsDevice graphicsDevice, DescriptorPool pool, DescriptorSetLayout desc)
{
if (pool.SrvOffset + desc.SrvCount > pool.SrvCount || pool.SamplerOffset + desc.SamplerCount > pool.SamplerCount)
{
// Eearly exit if OOM, IsValid should return false (TODO: different mechanism?)
Device = null;
BindingOffsets = null;
Description = null;
SrvStart = new CpuDescriptorHandle();
SamplerStart = new CpuDescriptorHandle();
return;
}
Device = graphicsDevice;
BindingOffsets = desc.BindingOffsets;
Description = desc;
// Store start CpuDescriptorHandle
SrvStart = desc.SrvCount > 0 ? (pool.SrvStart + graphicsDevice.SrvHandleIncrementSize * pool.SrvOffset) : new CpuDescriptorHandle();
SamplerStart = desc.SamplerCount > 0 ? (pool.SamplerStart + graphicsDevice.SamplerHandleIncrementSize * pool.SamplerOffset) : new CpuDescriptorHandle();
// Allocation is done, bump offsets
// TODO D3D12 thread safety?
pool.SrvOffset += desc.SrvCount;
pool.SamplerOffset += desc.SamplerCount;
}
internal unsafe VkDescriptorSet AllocateDescriptorSet(DescriptorSetLayout descriptorSetLayout)
{
// Keep track of descriptor pool usage
bool isPoolExhausted = ++allocatedSetCount > GraphicsDevice.MaxDescriptorSetCount;
for (int i = 0; i < DescriptorSetLayout.DescriptorTypeCount; i++)
{
allocatedTypeCounts[i] += descriptorSetLayout.TypeCounts[i];
if (allocatedTypeCounts[i] > GraphicsDevice.MaxDescriptorTypeCounts[i])
{
isPoolExhausted = true;
break;
}
}
if (isPoolExhausted)
{
return(VkDescriptorSet.Null);
}
// Allocate new descriptor set
var nativeLayoutCopy = descriptorSetLayout.NativeLayout;
var allocateInfo = new DescriptorSetAllocateInfo
{
sType = VkStructureType.DescriptorSetAllocateInfo,
DescriptorPool = NativeDescriptorPool,
DescriptorSetCount = 1,
SetLayouts = new IntPtr(&nativeLayoutCopy)
};
VkDescriptorSet descriptorSet;
GraphicsDevice.NativeDevice.AllocateDescriptorSets(ref allocateInfo, &descriptorSet);
return(descriptorSet);
}
private DescriptorSet(GraphicsDevice graphicsDevice, DescriptorPool pool, DescriptorSetLayout desc)
{
this.HeapObjects = pool.Entries;
this.DescriptorStartOffset = pool.Allocate(desc.ElementCount);
}
public static DescriptorSet New(GraphicsDevice graphicsDevice, DescriptorPool pool, DescriptorSetLayout desc)
{
return(new DescriptorSet(graphicsDevice, pool, desc));
}
private DescriptorSet(GraphicsDevice graphicsDevice, DescriptorPool pool, DescriptorSetLayout desc)
{
GraphicsDevice = graphicsDevice;
NativeDescriptorSet = pool.AllocateDescriptorSet(desc);
}