src/vulkan/overlay-layer/README

   1 A Vulkan layer to display information about the running application
   2 using an overlay.
   3
   4 To turn on the layer run :
   5 ```
   6 VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay /path/to/my_vulkan_app
   7 ```
   8
   9 List the available statistics :
  10 ```
  11 VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_STATS=help /path/to/my_vulkan_app
  12 ```
  13
  14 Turn on some statistics :
  15 ```
  16 VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_STATS=submit,draw,pipeline-graphics /path/to/my_vulkan_app
  17 ```
  18
  19 Position the layer :
  20 ```
  21 VK_INSTANCE_LAYERS=VK_LAYER_MESA_overlay VK_LAYER_MESA_OVERLAY_STATS=submit,draw,pipeline-graphics VK_LAYER_MESA_OVERLAY_POSITION=top-right /path/to/my_vulkan_app
  22 ```