Request: new format-testing tool
It would be nice to have a tool that can submit buffers in any format that the Wayland compositor accepts, and be used to compare the results for multiple buffer formats at a time. Existing clients, like weston-simple-dmabuf-egl, only draw one surface at a time, or are limited in what formats they can submit.
For example, one might wish to check that a compositor correctly handles WL_SHM_XBGR16161616F or DRM_FORMAT_UYVY import, by comparing an image rendered as such a buffer with an image rendered as a WL_SHM_FORMAT_XRGB8888 buffer.