This is like G_DECLARE_FINAL_TYPE(), except it doesn't make the class
struct public, so internally all the subclassing in the world can
happen.
Some subtle differences:
- It marks the get_type() function as G_GNUC_CONST
- It doesn't require the parent type
- It uses G_DEFINE_AUTOPTR_CLEANUP_FUNC() instead of the private glib
chainup method.
Port a bunch of GDK and the whole event controller + gesture machinery
to provew that it works.
As a side effect, we gained a bunch of missing autocleanups.
As far as possible, use per-display debug flags.
This will minimize the debug spew that we get from
the inspector if it is running on a separate display.
Previously, code would work fine with --disable-vulkan if the Vulkan
headers were installed - code would happily just use them as they're
installed in /usr/include.
gdk_window_create_vulkan_context() now exists and will return a Vulkan
context for the given window. It even initializes the surface. But it
doesn't do anything useful yet.
Adds the gdk_display_ref_vulkan() and gdk_display_unref_vulkan()
functions which setup/tear down VUlkan support for the display.
Nothing is using those functions yet.
