Pekka Paalanen authored Nov 22, 2018 and Jonas Ådahl committed Jan 30, 2019

Print the pixel format chosen for an output on a secondary GPU for
debugging. Knowing the format can aid in debugging e.g. red/blue channel
swaps and CPU copy performance issues.

This adds a DRM format printing helper in meta-crtc-kms.h. This header
is included in most native backend files making it widely available,
while DRM formats are specific to the native backend. It could be shared
with Wayland bits, DRM format codes are used there too.

The helper makes the pixel format much more readable than a "%x".

GNOME/mutter!341