1A Vulkan layer to display information about the running application 2using an overlay. 3 4To turn on the layer run : 5 6VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay /path/to/my_vulkan_app 7 8List the available statistics : 9 10VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_CONFIG=help /path/to/my_vulkan_app 11 12Turn on some statistics : 13VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_CONFIG=submit,draw,pipeline_graphics /path/to/my_vulkan_app 14 15Position the layer : 16 17VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_CONFIG=submit,draw,pipeline_graphics,position=top-right /path/to/my_vulkan_app 18