private void GetBufferMemoryRequirements(
SharpVulkan.Buffer buffer,
out SharpVulkan.MemoryRequirements requirements,
out bool prefersDedicatedAllocation,
out bool requiresDedicatedAllocation)
{
if (Context.SupportsDedicatedAllocation)
{
var requirementsInfo = new SharpVulkan.Ext.BufferMemoryRequirementsInfo2 {
StructureType = SharpVulkan.Ext.StructureType.BufferMemoryRequirementsInfo2,
Buffer = buffer
};
var dedicatedRequirements = new SharpVulkan.Ext.MemoryDedicatedRequirements {
StructureType = SharpVulkan.Ext.StructureType.MemoryDedicatedRequirements
};
var requirements2 = new SharpVulkan.Ext.MemoryRequirements2 {
StructureType = SharpVulkan.Ext.StructureType.MemoryRequirements2,
Next = new IntPtr(&dedicatedRequirements)
};
Context.VKExt.GetBufferMemoryRequirements2(Context.Device, ref requirementsInfo, ref requirements2);
requirements = requirements2.MemoryRequirements;
prefersDedicatedAllocation = dedicatedRequirements.PrefersDedicatedAllocation;
requiresDedicatedAllocation = dedicatedRequirements.RequiresDedicatedAllocation;
}
else
{
Context.Device.GetBufferMemoryRequirements(buffer, out requirements);
prefersDedicatedAllocation = false;
requiresDedicatedAllocation = false;
}
}
private MemoryAlloc Allocate(
SharpVulkan.MemoryRequirements requirements, SharpVulkan.Ext.MemoryDedicatedAllocateInfo *dedicatedAllocateInfo,
bool prefersDedicated, bool requiresDedicated, SharpVulkan.MemoryPropertyFlags propertyFlags, bool linear)
{
var type = TryFindMemoryType(requirements.MemoryTypeBits, propertyFlags);
if (type == null)
{
throw new InvalidOperationException();
}
if (prefersDedicated)
{
var memory = TryAllocateDeviceMemory(type, requirements.Size, dedicatedAllocateInfo);
if (memory != null)
{
return(new MemoryAlloc(this, memory));
}
if (requiresDedicated)
{
throw new OutOfMemoryException();
}
}
return(AllocateFromBlock(type, requirements.Size, requirements.Alignment, linear));
}
