Function TestMemoryRequirements

src/Tests.cpp:3122–3181

}

static void TestMemoryRequirements()
{
    VkResult res;
    VkBuffer buf;
    VmaAllocation alloc;
    VmaAllocationInfo allocInfo;

    const VkPhysicalDeviceMemoryProperties* memProps;
    vmaGetMemoryProperties(g_hAllocator, &memProps);

    VkBufferCreateInfo bufInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
    bufInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
    bufInfo.size = 128;

    VmaAllocationCreateInfo allocCreateInfo = {};

    // No requirements.
    res = vmaCreateBuffer(g_hAllocator, &bufInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
    TEST(res == VK_SUCCESS);
    vmaDestroyBuffer(g_hAllocator, buf, alloc);

    // Usage = auto + host access.
    allocCreateInfo.usage = VMA_MEMORY_USAGE_AUTO;
    allocCreateInfo.flags = VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT;
    allocCreateInfo.requiredFlags = 0;
    allocCreateInfo.preferredFlags = 0;
    allocCreateInfo.memoryTypeBits = UINT32_MAX;

    res = vmaCreateBuffer(g_hAllocator, &bufInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
    TEST(res == VK_SUCCESS);
    TEST(memProps->memoryTypes[allocInfo.memoryType].propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
    vmaDestroyBuffer(g_hAllocator, buf, alloc);

    // Required flags, preferred flags.
    allocCreateInfo.usage = VMA_MEMORY_USAGE_UNKNOWN;
    allocCreateInfo.flags = 0;
    allocCreateInfo.requiredFlags = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
    allocCreateInfo.preferredFlags = VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT | VK_MEMORY_PROPERTY_HOST_CACHED_BIT;
    allocCreateInfo.memoryTypeBits = 0;

    res = vmaCreateBuffer(g_hAllocator, &bufInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
    TEST(res == VK_SUCCESS);
    TEST(memProps->memoryTypes[allocInfo.memoryType].propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
    TEST(memProps->memoryTypes[allocInfo.memoryType].propertyFlags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
    vmaDestroyBuffer(g_hAllocator, buf, alloc);

    // memoryTypeBits.
    const uint32_t memType = allocInfo.memoryType;
    allocCreateInfo.usage = VMA_MEMORY_USAGE_UNKNOWN;
    allocCreateInfo.flags = 0;
    allocCreateInfo.requiredFlags = 0;
    allocCreateInfo.preferredFlags = 0;
    allocCreateInfo.memoryTypeBits = 1u << memType;

    res = vmaCreateBuffer(g_hAllocator, &bufInfo, &allocCreateInfo, &buf, &alloc, &allocInfo);
    TEST(res == VK_SUCCESS);
    TEST(allocInfo.memoryType == memType);
    vmaDestroyBuffer(g_hAllocator, buf, alloc);