public MgOptimizedStorageMap MapAllocations(MgOptimizedStorageCreateInfo createInfo, MgStorageBufferInstance[] bufferInstances)
{
Validate(createInfo);
var attributes = new MgOptimizedStorageAllocation[createInfo.Allocations.Length];
for (var i = 0U; i < bufferInstances.Length; i += 1)
{
var instance = bufferInstances[i];
foreach (var mapping in instance.Mappings)
{
attributes[mapping.Index] = new MgOptimizedStorageAllocation
{
AllocationIndex = mapping.Index,
BlockIndex = i,
Offset = mapping.Offset,
Size = mapping.Size,
Usage = mapping.Usage,
};
}
}
return(new MgOptimizedStorageMap {
Allocations = attributes
});
}
public MgStorageBufferInstance[] PrepareInstances(MgOptimizedStorageCreateInfo createInfo)
{
// setup
Validate(createInfo);
var optimalLayout = mSplitter.Setup(createInfo.Allocations);
return(mVerifier.Revise(createInfo, optimalLayout));
}
private void Validate(MgOptimizedStorageCreateInfo createInfo)
{
if (createInfo.Allocations == null)
{
throw new ArgumentNullException("createInfo.Allocations");
}
if (createInfo.Allocations.Length <= 0)
{
throw new ArgumentOutOfRangeException("createInfo.Allocations must be greater than zero");
}
}
public MgOptimizedStorageContainer Build(MgOptimizedStorageCreateInfo createInfo)
{
var bufferInstances = PrepareInstances(createInfo);
var storageMap = MapAllocations(createInfo, bufferInstances);
var storage = AllocateBlocks(bufferInstances);
return(new MgOptimizedStorageContainer
{
Storage = storage,
Map = storageMap,
});
}
public MgStorageBufferInstance[] Revise(MgOptimizedStorageCreateInfo createInfo, MgStorageBlockInfo[] segments)
{
var output = new List <MgStorageBufferInstance>();
foreach (var sector in segments)
{
if (DoPack(sector, createInfo, out MgStorageBufferInstance firstOutput))
{
output.Add(firstOutput);
}
else
{
OntoSecondChance(output, sector, createInfo);
}
}
return(output.ToArray());
}
private void OntoFinalChance(List <MgStorageBufferInstance> output, MgStorageBlockInfo second, MgOptimizedStorageCreateInfo createInfo)
{
var individuals = SplitToSingleBuffers(second);
foreach (var single in individuals)
{
if (DoPack(single, createInfo, out MgStorageBufferInstance thirdOutput))
{
output.Add(thirdOutput);
}
else
{
throw new InvalidOperationException("Cannot create buffer for MgOptimizedMesh");
}
}
}
private void OntoSecondChance(List <MgStorageBufferInstance> output, MgStorageBlockInfo sector, MgOptimizedStorageCreateInfo createInfo)
{
MgStorageBlockInfo[] slices = SubdivideByMemoryPropertyFlags(sector, createInfo.Allocations);
foreach (var second in slices)
{
if (DoPack(second, createInfo, out MgStorageBufferInstance secondOutput))
{
output.Add(secondOutput);
}
else
{
OntoFinalChance(output, second, createInfo);
}
}
}
private bool DoPack(MgStorageBlockInfo sector, MgOptimizedStorageCreateInfo createInfo, out MgStorageBufferInstance instance)
{
MgBufferUsageFlagBits bufferUsage = 0;
MgMemoryPropertyFlagBits deviceMemoryProperties = 0;
var sortedList = new SortedDictionary <SortedKey, uint>();
foreach (var attr in sector.Attributes)
{
bufferUsage |= attr.Usage;
deviceMemoryProperties |= createInfo.Allocations[attr.Index].MemoryPropertyFlags;
var firstGroup = 0U;
for (var i = 0U; i < mPackingOrder.Length; i += 1)
{
firstGroup = i;
var first = (mPackingOrder[i] & createInfo.Allocations[attr.Index].Usage) > 0;
if (first)
{
break;
}
}
Debug.Assert(firstGroup <= mPackingOrder.Length);
var key = new SortedKey
{
Group = firstGroup,
SubOrder = attr.Index,
};
sortedList.Add(key, attr.Index);
}
ulong overallSize = 0;
var pCreateInfo = new MgBufferCreateInfo
{
SharingMode = createInfo.SharingMode,
QueueFamilyIndices = createInfo.QueueFamilyIndices,
Size = 0,
Usage = bufferUsage,
};
// The alignment member is identical for all VkBuffer objects created with the same combination of values
// for the usage and flags members in the VkBufferCreateInfo structure passed to vkCreateBuffer.
var err = mConfiguration.Device.CreateBuffer(pCreateInfo, null, out IMgBuffer pZeroBuffer);
if (err != Result.SUCCESS)
{
instance = null;
return(false);
}
mConfiguration.Device.GetBufferMemoryRequirements(pZeroBuffer, out MgMemoryRequirements pZeroMemReqs);
pZeroBuffer.DestroyBuffer(mConfiguration.Device, null);
var requiredAlignment = pZeroMemReqs.Alignment;
var mappings = new List <MgStorageBufferOffset>();
foreach (var element in sortedList.Values)
{
var attr = createInfo.Allocations[element];
var mapping = new MgStorageBufferOffset
{
Index = element,
Offset = UpperBounded(overallSize, requiredAlignment),
Size = attr.Size,
Usage = attr.Usage,
};
mappings.Add(mapping);
overallSize = mapping.Offset + mapping.Size;
}
// Real memory allocation
pCreateInfo.Size = overallSize;
err = mConfiguration.Device.CreateBuffer(pCreateInfo, null, out IMgBuffer pBuffer);
if (err != Result.SUCCESS)
{
instance = null;
return(false);
}
mConfiguration.Device.GetBufferMemoryRequirements(pBuffer, out MgMemoryRequirements pMemReqs);
if (mConfiguration.MemoryProperties.GetMemoryType(pMemReqs.MemoryTypeBits, deviceMemoryProperties, out uint typeIndex))
{
instance = new MgStorageBufferInstance
{
Buffer = pBuffer,
Usage = bufferUsage,
MemoryPropertyFlags = deviceMemoryProperties,
TypeIndex = typeIndex,
AllocationSize = pMemReqs.Size,
Mappings = mappings.ToArray(),
};
return(true);
}
else
{
// CLEAN UP
pBuffer.DestroyBuffer(mConfiguration.Device, null);
instance = null;
return(false);
}
}