Function TestAdvancedDataUploading

src/Tests.cpp:6423–6531

}

static void TestAdvancedDataUploading() {
    wprintf(L"Testing advanced data uploading...\n");

    // Generate some random data to fill the uniform buffer with.
    const VkDeviceSize bufferSize = 65536;
    std::vector<std::uint8_t> bufferData(bufferSize);
    for (auto& bufferByte : bufferData) {
        bufferByte = static_cast<std::uint8_t>(rand() % 256);
    }

    VkBufferCreateInfo uniformBufferCI = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
    uniformBufferCI.size = bufferSize;
    uniformBufferCI.usage = VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT; // Change this if you want to create another type of buffer.

    VmaAllocationCreateInfo uniformBufferAllocCI = {};
    uniformBufferAllocCI.usage = VMA_MEMORY_USAGE_AUTO;
    uniformBufferAllocCI.flags = VMA_ALLOCATION_CREATE_HOST_ACCESS_SEQUENTIAL_WRITE_BIT | VMA_ALLOCATION_CREATE_HOST_ACCESS_ALLOW_TRANSFER_INSTEAD_BIT
                                    | VMA_ALLOCATION_CREATE_MAPPED_BIT;

    VkBuffer uniformBuffer = VK_NULL_HANDLE;
    VmaAllocation uniformBufferAlloc = {};
    VmaAllocationInfo uniformBufferAllocInfo = {};

    VkResult result = vmaCreateBuffer(g_hAllocator, &uniformBufferCI, &uniformBufferAllocCI, &uniformBuffer, &uniformBufferAlloc, &uniformBufferAllocInfo);
    TEST(result == VK_SUCCESS);

    VkMemoryPropertyFlags memPropFlags;
    vmaGetAllocationMemoryProperties(g_hAllocator, uniformBufferAlloc, &memPropFlags);

    if (memPropFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) {
        // The allocation ended up as mapped memory.
        TEST(uniformBufferAllocInfo.pMappedData != nullptr);
        result = vmaCopyMemoryToAllocation(g_hAllocator, bufferData.data(), uniformBufferAlloc, 0, bufferData.size());
        TEST(result == VK_SUCCESS);

        BeginSingleTimeCommands();

        VkBufferMemoryBarrier bufferMemBarrier = { VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER };
        bufferMemBarrier.srcAccessMask = VK_ACCESS_HOST_WRITE_BIT;
        bufferMemBarrier.dstAccessMask = VK_ACCESS_UNIFORM_READ_BIT; // Change this if you want to create another type of buffer.
        bufferMemBarrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
        bufferMemBarrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
        bufferMemBarrier.buffer = uniformBuffer;
        bufferMemBarrier.offset = 0;
        bufferMemBarrier.size = VK_WHOLE_SIZE;

        vkCmdPipelineBarrier(g_hTemporaryCommandBuffer, VK_PIPELINE_STAGE_HOST_BIT, VK_PIPELINE_STAGE_VERTEX_SHADER_BIT, 0, 0, nullptr, 1, &bufferMemBarrier, 0, nullptr);

        EndSingleTimeCommands();
    }
    else {
        // The allocation did not end up in mapped memory, so we need a staging buffer and a copy operation to update it.
        VkBufferCreateInfo stagingBufferCI = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
        stagingBufferCI.size = bufferSize;
        stagingBufferCI.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;

        VmaAllocationCreateInfo stagingBufferAllocCI = {};
        stagingBufferAllocCI.usage = VMA_MEMORY_USAGE_AUTO;