void HelloTriangle::init_swapchain(Context &context)
{
	VkSurfaceCapabilitiesKHR surface_properties;
	VK_CHECK(vkGetPhysicalDeviceSurfaceCapabilitiesKHR(context.gpu, context.surface, &surface_properties));
...
VkSwapchainCreateInfoKHR info{VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR};
info.surface            = context.surface;
info.minImageCount      = desired_swapchain_images;
info.imageFormat        = format.format;
info.imageColorSpace    = format.colorSpace;
info.imageExtent.width  = swapchain_size.width;
info.imageExtent.height = swapchain_size.height;
info.imageArrayLayers   = 1;
info.imageUsage         = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
info.imageSharingMode   = VK_SHARING_MODE_EXCLUSIVE;
info.preTransform       = pre_transform;
info.compositeAlpha     = composite;
info.presentMode        = swapchain_present_mode;
info.clipped            = true;
info.oldSwapchain       = old_swapchain;

VK_CHECK(vkCreateSwapchainKHR(context.device, &info, nullptr, &context.swapchain));

if (old_swapchain != VK_NULL_HANDLE)
{
	for (VkImageView image_view : context.swapchain_image_views)
	{
		vkDestroyImageView(context.device, image_view, nullptr);
	}

	uint32_t image_count;
	VK_CHECK(vkGetSwapchainImagesKHR(context.device, old_swapchain, &image_count, nullptr));
	for (size_t i = 0; i < image_count; i++)
	{
		teardown_per_frame(context, context.per_frame[i]);
	}

	context.swapchain_image_views.clear();

	vkDestroySwapchainKHR(context.device, old_swapchain, nullptr);
}
...

uint32_t image_count;
VK_CHECK(vkGetSwapchainImagesKHR(context.device, old_swapchain, &image_count, nullptr));