int Texture2DVK::loadFromFile(std::string filename) {
    const char * filename_char = filename.c_str();

    int texWidth, texHeight, texChannels;
    stbi_uc* pixels = stbi_load(filename_char, &texWidth, &texHeight, &texChannels, STBI_rgb_alpha);
    DeviceSize imageSize = texWidth * texHeight * 4;

    if (!pixels) {
        return -1;
    }

    ImageCreateInfo imageInfo = {};
    imageInfo.imageType = ImageType::e2D;
    imageInfo.extent.width = static_cast<uint32_t>(texWidth);
    imageInfo.extent.height = static_cast<uint32_t>(texHeight);
    imageInfo.extent.depth = 1;
    imageInfo.mipLevels = 1;
    imageInfo.arrayLayers = 1;
    imageInfo.format = Format::eR8G8B8A8Unorm;
    imageInfo.tiling = ImageTiling::eOptimal;
    imageInfo.initialLayout = ImageLayout::eUndefined;
    imageInfo.usage = ImageUsageFlagBits::eTransferDst | ImageUsageFlagBits::eSampled;
    imageInfo.sharingMode = SharingMode::eExclusive;
    imageInfo.samples = SampleCountFlagBits::e1;    //wrong?
    imageInfo.flags = vk::ImageCreateFlags();

    if (device.createImage(&imageInfo, nullptr, &textureImage) != Result::eSuccess) {   //create empty Image space
        return -1;
    }

    MemoryRequirements memReq;
    device.getImageMemoryRequirements();

    return 0;
}