Remove render ahead from hwui

As HWUI uses vsync id to send buffers to SF, SF applies the right
amount of render ahead by latching the buffers at the configured time.

Test: launch an app and observe systrace
Bug: 178148035
Change-Id: Ifd3e1a2971aad0a085cb35d33e950194046aa634

1 files changed, 0 insertions, 17 deletions

diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index 33dabc9895b1..a4adb16a930e 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -123,23 +123,6 @@ public:
     void removeFrameMetricsObserver(FrameMetricsObserver* observer);
     void setForceDark(bool enable);
 
-    /**
-     * Sets a render-ahead depth on the backing renderer. This will increase latency by
-     * <swapInterval> * renderAhead and increase memory usage by (3 + renderAhead) * <resolution>.
-     * In return the renderer will be less susceptible to jitter, resulting in a smoother animation.
-     *
-     * Not recommended to use in response to anything touch driven, but for canned animations
-     * where latency is not a concern careful use may be beneficial.
-     *
-     * Note that when increasing this there will be a frame gap of N frames where N is
-     * renderAhead - <current renderAhead>. When decreasing this if there are any pending
-     * frames they will retain their prior renderAhead value, so it will take a few frames
-     * for the decrease to flush through.
-     *
-     * @param renderAhead How far to render ahead, must be in the range [0..2]
-     */
-    void setRenderAheadDepth(int renderAhead);
-
     static int copySurfaceInto(ANativeWindow* window, int left, int top, int right,
                                            int bottom, SkBitmap* bitmap);
     static void prepareToDraw(Bitmap& bitmap);