Merge "Delete SurfaceFlinger CFlags (phase offset)"

    LOCAL_CFLAGS += -DRUNNING_WITHOUT_SYNC_FRAMEWORK

endif

# The following two BoardConfig variables define (respectively):

#

#   - The phase offset between hardware vsync and when apps are woken up by the

#     Choreographer callback

#   - The phase offset between hardware vsync and when SurfaceFlinger wakes up

#     to consume input

#

# Their values can be tuned to trade off between display pipeline latency (both

# overall latency and the lengths of the app --> SF and SF --> display phases)

# and frame delivery jitter (which typically manifests as "jank" or "jerkiness"

# while interacting with the device). The default values should produce a

# relatively low amount of jitter at the expense of roughly two frames of

# app --> display latency, and unless significant testing is performed to avoid

# increased display jitter (both manual investigation using systrace [1] and

# automated testing using dumpsys gfxinfo [2] are recommended), they should not

# be modified.

#

# [1] https://developer.android.com/studio/profile/systrace.html

# [2] https://developer.android.com/training/testing/performance.html

# These are left just for non-treble devices

ifneq ($(VSYNC_EVENT_PHASE_OFFSET_NS),)

    LOCAL_CFLAGS += -DVSYNC_EVENT_PHASE_OFFSET_NS=$(VSYNC_EVENT_PHASE_OFFSET_NS)

else

    LOCAL_CFLAGS += -DVSYNC_EVENT_PHASE_OFFSET_NS=1000000

endif

ifneq ($(SF_VSYNC_EVENT_PHASE_OFFSET_NS),)

    LOCAL_CFLAGS += -DSF_VSYNC_EVENT_PHASE_OFFSET_NS=$(SF_VSYNC_EVENT_PHASE_OFFSET_NS)

else

    LOCAL_CFLAGS += -DSF_VSYNC_EVENT_PHASE_OFFSET_NS=1000000

endif

ifneq ($(PRESENT_TIME_OFFSET_FROM_VSYNC_NS),)

    LOCAL_CFLAGS += -DPRESENT_TIME_OFFSET_FROM_VSYNC_NS=$(PRESENT_TIME_OFFSET_FROM_VSYNC_NS)

else