From f57c0163f9c6fe8596a56df52a98f3f912f40ef5 Mon Sep 17 00:00:00 2001
From: Robert Carr <racarr@google.com>
Date: Wed, 24 Mar 2021 15:48:25 -0700
Subject: ASurfaceTransaction: Add setEnableBackpressure

Expose the backpressure flag to NDK. See comment in
header file for extensive discussion.

Bug: 177458703
Test: Need new CTS
Change-Id: I97cdaef5d499f57a270972f001517b8a520aa2fe
---
 native/android/surface_control.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'native/android/surface_control.cpp')

diff --git a/native/android/surface_control.cpp b/native/android/surface_control.cpp
index 195fd5e60295..8b60480bfe73 100644
--- a/native/android/surface_control.cpp
+++ b/native/android/surface_control.cpp
@@ -655,3 +655,17 @@ void ASurfaceTransaction_setFrameRateWithSeamlessness(ASurfaceTransaction* aSurf
     sp<SurfaceControl> surfaceControl = ASurfaceControl_to_SurfaceControl(aSurfaceControl);
     transaction->setFrameRate(surfaceControl, frameRate, compatibility, shouldBeSeamless);
 }
+
+void ASurfaceTransaction_setEnableBackPressure(ASurfaceTransaction* aSurfaceTransaction,
+                                               ASurfaceControl* aSurfaceControl,
+                                               bool enableBackpressure) {
+    CHECK_NOT_NULL(aSurfaceControl);
+    CHECK_NOT_NULL(aSurfaceTransaction);
+
+    sp<SurfaceControl> surfaceControl = ASurfaceControl_to_SurfaceControl(aSurfaceControl);
+    Transaction* transaction = ASurfaceTransaction_to_Transaction(aSurfaceTransaction);
+
+    const uint32_t flags = enableBackpressure ?
+                      layer_state_t::eEnableBackpressure : 0;
+    transaction->setFlags(surfaceControl, flags, layer_state_t::eEnableBackpressure);
+}
-- 
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