A Vulkan layer to display information about the running application
using an overlay.

To turn on the layer run :

VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay /path/to/my_vulkan_app

List the available statistics :

VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_CONFIG=help /path/to/my_vulkan_app

Turn on some statistics :
VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_CONFIG=submit,draw,pipeline_graphics /path/to/my_vulkan_app

Position the layer :

VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_CONFIG=submit,draw,pipeline_graphics,position=top-right /path/to/my_vulkan_app
