private DeviceMemory TryAllocateDeviceMemory(MemoryType type, ulong size, SharpVulkan.Ext.MemoryDedicatedAllocateInfo *dedicatedAllocateInfo)
{
var allocateInfo = new SharpVulkan.MemoryAllocateInfo {
StructureType = SharpVulkan.StructureType.MemoryAllocateInfo,
MemoryTypeIndex = type.Index,
AllocationSize = size,
Next = new IntPtr(dedicatedAllocateInfo)
};
DeviceMemory memory;
try {
memory = new DeviceMemory(Context.Device.AllocateMemory(ref allocateInfo), type, size);
} catch (SharpVulkan.SharpVulkanException e) when(e.Result == SharpVulkan.Result.ErrorOutOfDeviceMemory)
{
return(null);
}
if (ShouldMapPersistenly(type))
{
MapDeviceMemory(memory);
}
return(memory);
}
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));
}
