-/* swapchain */
-VkSwapchainKHR vku_create_swapchain(VkSurfaceKHR surf, int xsz, int ysz, int n,
- VkPresentModeKHR pmode, VkSwapchainKHR prev);
-VkImage *vku_get_swapchain_images(VkSwapchainKHR sc, int *count);
-VkImageView *vku_create_image_views(VkImage *images, int count);
+bool vku_get_surface_format(VkPhysicalDevice gpu, VkSurfaceKHR surface, VkSurfaceFormatKHR *sformat);
+VkColorSpaceKHR vku_get_surface_colorspace(VkPhysicalDevice gpu, VkSurfaceKHR surface);
+