Buffer

Sat, 12 Jun 2021 00:00:00 -0500

Buffers are unstructured regions of contiguous memory. Buffers are created from Memory objects:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11


import lluvia as ll

session = ll.createSession()

hostMemory = session.createMemory([ll.MemoryPropertyFlagBits.DeviceLocal,
 ll.MemoryPropertyFlagBits.HostVisible,
 ll.MemoryPropertyFlagBits.HostCoherent])

aBuffer = hostMemory.createBuffer(1024, usageFlags=[ll.BufferUsageFlagBits.TransferDst,
 ll.BufferUsageFlagBits.TransferSrc,
 ll.BufferUsageFlagBits.StorageBuffer])

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22


#include <iostream>
#include <vulkan/vulkan.hpp>
#include "lluvia/core.h"

#include <vulkan/vulkan.hpp>

int main() {
 
 ll::SessionDescriptor desc = ll::SessionDescriptor().enableDebug(true);

 std::shared_ptr<ll::Session> session = ll::Session::create(desc);

 hostMemory = session.createMemory([ll.MemoryPropertyFlagBits.DeviceLocal,
 ll.MemoryPropertyFlagBits.HostVisible,
 ll.MemoryPropertyFlagBits.HostCoherent])

 const auto usageFlags = vk::BufferUsageFlags { vk::BufferUsageFlagBits::eStorageBuffer
 | vk::BufferUsageFlagBits::eTransferSrc
 | vk::BufferUsageFlagBits::eTransferDst};

 auto aBuffer = hostMemory->createBuffer(1024, usageFlags);
}

The first parameter is the requested size in bytes. The usageFlags indicated the intended usage of this buffer; the values are taken directly from the Vulkan BufferUsageFlagBits. The most used values are:

Image

Sat, 12 Jun 2021 00:00:00 -0500

ImageView

Sat, 12 Jun 2021 00:00:00 -0500

Objects on Lluvia

Buffer

Image

ImageView