Function TestDebugMargin

src/Tests.cpp:3975–4067

#endif

static void TestDebugMargin()
{
    if(VMA_DEBUG_MARGIN == 0)
    {
        return;
    }

    wprintf(L"Test VMA_DEBUG_MARGIN = %u\n", (uint32_t)VMA_DEBUG_MARGIN);

    VkBufferCreateInfo bufInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
    bufInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
    bufInfo.size = 256; // Doesn't matter

    VmaAllocationCreateInfo allocCreateInfo = {};
    allocCreateInfo.usage = VMA_MEMORY_USAGE_AUTO_PREFER_HOST;
    allocCreateInfo.flags = VMA_ALLOCATION_CREATE_HOST_ACCESS_RANDOM_BIT;

    VmaPoolCreateInfo poolCreateInfo = {};
    TEST(vmaFindMemoryTypeIndexForBufferInfo(
        g_hAllocator, &bufInfo, &allocCreateInfo, &poolCreateInfo.memoryTypeIndex) == VK_SUCCESS);

    for(size_t algorithmIndex = 0; algorithmIndex < 2; ++algorithmIndex)
    {
        switch(algorithmIndex)
        {
        case 0: poolCreateInfo.flags = 0; break;
        case 1: poolCreateInfo.flags = VMA_POOL_CREATE_LINEAR_ALGORITHM_BIT; break;
        default: assert(0);
        }
        VmaPool pool = VK_NULL_HANDLE;
        TEST(vmaCreatePool(g_hAllocator, &poolCreateInfo, &pool) == VK_SUCCESS && pool);

        allocCreateInfo.pool = pool;

        // Create few buffers of different size.
        const size_t BUF_COUNT = 10;
        BufferInfo buffers[BUF_COUNT];
        VmaAllocationInfo allocInfo[BUF_COUNT];
        for(size_t allocIndex = 0; allocIndex < 10; ++allocIndex)
        {
            const bool isLast = allocIndex == BUF_COUNT - 1;
            bufInfo.size = (VkDeviceSize)(allocIndex + 1) * 256;
            // Last one will be mapped.
            allocCreateInfo.flags = isLast ? VMA_ALLOCATION_CREATE_MAPPED_BIT : 0;

            VkResult res = vmaCreateBuffer(g_hAllocator, &bufInfo, &allocCreateInfo, &buffers[allocIndex].Buffer, &buffers[allocIndex].Allocation, &allocInfo[allocIndex]);
            TEST(res == VK_SUCCESS);

            if(isLast)
            {
                // Fill with data.
                TEST(allocInfo[allocIndex].pMappedData != nullptr);
                // Uncomment this "+ 1" to overwrite past end of allocation and check corruption detection.
                memset(allocInfo[allocIndex].pMappedData, 0xFF, bufInfo.size /* + 1 */);
            }
        }

        // Check if their offsets preserve margin between them.