//VkMemoryPropertyFlagBits.VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
private uint GetMemoryTypeIndex(VkPhysicalDeviceMemoryProperties memoryProperties, VkMemoryRequirements memoryReq, VkMemoryPropertyFlagBits flags)
{
uint result = 0;
bool heapIndexSet = false;
VkMemoryType *memoryTypes = (VkMemoryType *)memoryProperties.memoryTypes;
for (uint i = 0; i < memoryProperties.memoryTypeCount; i++)
{
if (((memoryReq.memoryTypeBits >> (int)i) & 1) == 1 &&
(memoryTypes[i].propertyFlags & flags) == flags)
{
result = i;
heapIndexSet = true;
break;
}
}
if (!heapIndexSet)
{
result = memoryTypes[0].heapIndex;
}
return(result);
}
/// <summary>
/// Gets the memory heaps and types for the device.
/// </summary>
/// <param name="device">The device to get the memory info for.</param>
/// <param name="types">The memory types for the device.</param>
/// <param name="heaps">The memory heaps for the device.</param>
public static void GetMemoryInfo(VkPhysicalDevice device,
out VkMemoryType[] types, out VkMemoryHeap[] heaps)
{
if (!device)
{
throw new ArgumentNullException(nameof(device), "Cannot pass null device or device handle");
}
VkPhysicalDeviceMemoryProperties.New(out var props);
device.GetPhysicalDeviceMemoryProperties(&props);
VkMemoryType *typePtr = &(props.MemoryTypes_0);
VkMemoryHeap *heapPtr = &(props.MemoryHeaps_0);
types = new VkMemoryType[props.MemoryTypeCount];
heaps = new VkMemoryHeap[props.MemoryHeapCount];
for (uint i = 0; i < props.MemoryTypeCount; ++i)
{
types[i] = typePtr[i];
}
for (uint i = 0; i < props.MemoryHeapCount; ++i)
{
heaps[i] = heapPtr[i];
}
}
