diff options
Diffstat (limited to 'include/ui')
| -rw-r--r-- | include/ui/egl/android_natives.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/ui/egl/android_natives.h b/include/ui/egl/android_natives.h index fdc8105..fd83f46 100644 --- a/include/ui/egl/android_natives.h +++ b/include/ui/egl/android_natives.h @@ -75,6 +75,26 @@ enum { NATIVE_WINDOW_WIDTH = 0, NATIVE_WINDOW_HEIGHT, NATIVE_WINDOW_FORMAT, + + /* The minimum number of buffers that must remain un-dequeued after a buffer + * has been queued. This value applies only if set_buffer_count was used to + * override the number of buffers and if a buffer has since been queued. + * Users of the set_buffer_count ANativeWindow method should query this + * value before calling set_buffer_count. If it is necessary to have N + * buffers simultaneously dequeued as part of the steady-state operation, + * and this query returns M then N+M buffers should be requested via + * native_window_set_buffer_count. + * + * Note that this value does NOT apply until a single buffer has been + * queued. In particular this means that it is possible to: + * + * 1. Query M = min undequeued buffers + * 2. Set the buffer count to N + M + * 3. Dequeue all N + M buffers + * 4. Cancel M buffers + * 5. Queue, dequeue, queue, dequeue, ad infinitum + */ + NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, }; /* valid operations for the (*perform)() hook */ |