Function create_graphics_pipelines 

pub unsafe fn create_graphics_pipelines(
    device: VkDevice,
    pipeline_cache: Option<VkPipelineCache>,
    create_info_count: u32,
    create_infos: *const VkGraphicsPipelineCreateInfo,
    allocator: *const VkAllocationCallbacks,
    pipelines_out: *mut VkPipeline,
) -> VkResult

Safety

direct calling ffi functions.