Function TestAllocationWithAlignment

src/Tests.cpp:6143–6288

}

static void TestAllocationWithAlignment()
{
    wprintf(L"Test allocation with alignment\n");

    static const VkDeviceSize BUFFER_SIZE = 4 * KILOBYTE;
    static const VkDeviceSize MIN_ALIGNMENT = 64 * KILOBYTE;

    VkBufferCreateInfo bufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
    bufCreateInfo.size = BUFFER_SIZE;
    bufCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
    
    VkResult res;

    // 1. Using vmaAllocateMemory with VmaAllocationCreateInfo::minAlignment
    {
        VkBuffer buffers[2] = {};
        VkMemoryRequirements memReq[2] = {};
        VmaAllocation allocations[2] = {};
        VmaAllocationInfo allocInfo[2] = {};

        for(uint32_t i = 0; i < 2; ++i)
        {
            res = vkCreateBuffer(g_hDevice, &bufCreateInfo, g_Allocs, &buffers[i]);
            TEST(res == VK_SUCCESS && buffers[i] != VK_NULL_HANDLE);
            vkGetBufferMemoryRequirements(g_hDevice, buffers[i], &memReq[i]);
        }

        VmaAllocationCreateInfo allocCreateInfo = {};
        allocCreateInfo.minAlignment = MIN_ALIGNMENT;

        for(uint32_t i = 0; i < 2; ++i)
        {
            res = vmaAllocateMemory(g_hAllocator, &memReq[i], &allocCreateInfo, &allocations[i], &allocInfo[i]);
            TEST(res == VK_SUCCESS && allocations[i] != VK_NULL_HANDLE);
            TEST(allocInfo[i].offset % MIN_ALIGNMENT == 0); // !!!
        }

        for(uint32_t i = 0; i < 2; ++i)
        {
            res = vmaBindBufferMemory(g_hAllocator, allocations[i], buffers[i]);
            TEST(res == VK_SUCCESS);
        }

        for(uint32_t i = 0; i < 2; ++i)
        {
            vkDestroyBuffer(g_hDevice, buffers[i], g_Allocs);
            vmaFreeMemory(g_hAllocator, allocations[i]);
        }
    }

    // 2. Using vmaCreateBuffer with VmaAllocationCreateInfo::minAlignment
    {
        VkBuffer buffers[2] = {};
        VmaAllocation allocations[2] = {};
        VmaAllocationInfo allocInfo[2] = {};

        VmaAllocationCreateInfo allocCreateInfo = {};
        allocCreateInfo.minAlignment = MIN_ALIGNMENT;