From 0a866ea450d9fec88e9e15988afdf9265f021c34 Mon Sep 17 00:00:00 2001 From: Dan Stoza Date: Wed, 25 Feb 2015 16:45:08 -0800 Subject: [PATCH] ANativeWindow: Add NATIVE_WINDOW_BUFFER_AGE query Adds a NATIVE_WINDOW_BUFFER_AGE query, which returns the age of the contents of the most recently dequeued buffer as the number of frames that have elapsed since it was last queued. Change-Id: Ib6fd62945cb62d1e60133a65beee510363218a23 (cherry picked from commit 19df32cd19b7fd940eef01b9c92a485144263495) --- include/system/window.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/include/system/window.h b/include/system/window.h index a87542758..508ce00ba 100644 --- a/include/system/window.h +++ b/include/system/window.h @@ -267,7 +267,16 @@ enum { * The default data space for the buffers as set by the consumer. * The values are defined in graphics.h. */ - NATIVE_WINDOW_DEFAULT_DATASPACE = 12 + NATIVE_WINDOW_DEFAULT_DATASPACE = 12, + + /* + * Returns the age of the contents of the most recently dequeued buffer as + * the number of frames that have elapsed since it was last queued. For + * example, if the window is double-buffered, the age of any given buffer in + * steady state will be 2. If the dequeued buffer has never been queued, its + * age will be 0. + */ + NATIVE_WINDOW_BUFFER_AGE = 13, }; /* Valid operations for the (*perform)() hook.