commit 98fe7819c6d14f4f464a5cac047f9e82dee5da58
author Justin Klaassen <justinklaassen@google.com> Wed Jan 03 13:39:41 2018 -0500
committer Justin Klaassen <justinklaassen@google.com> Wed Jan 03 13:39:41 2018 -0500
tree a6b8b93eb21e205b27590ab5e2a1fb9efe27f892
parent 4217cf85c20565a3446a662a7f07f26137b26b7f

Import Android SDK Platform P [4524038]

/google/data/ro/projects/android/fetch_artifact \
    --bid 4524038 \
    --target sdk_phone_armv7-win_sdk \
    sdk-repo-linux-sources-4524038.zip

AndroidVersion.ApiLevel has been modified to appear as 28

Change-Id: Ic193bf1cf0cae78d4f2bfb4fbddfe42025c5c3c2

android/view/ThreadedRenderer.java

diff --git a/android/view/ThreadedRenderer.java b/android/view/ThreadedRenderer.java
index 7c76bab..6a8f8b1 100644
--- a/android/view/ThreadedRenderer.java
+++ b/android/view/ThreadedRenderer.java
@@ -190,6 +190,17 @@
     public static final String DEBUG_SHOW_NON_RECTANGULAR_CLIP_PROPERTY =
             "debug.hwui.show_non_rect_clip";
 
+    /**
+     * Sets the FPS devisor to lower the FPS.
+     *
+     * Sets a positive integer as a divisor. 1 (the default value) menas the full FPS, and 2
+     * means half the full FPS.
+     *
+     *
+     * @hide
+     */
+    public static final String DEBUG_FPS_DIVISOR = "debug.hwui.fps_divisor";
+
     static {
         // Try to check OpenGL support early if possible.
         isAvailable();
@@ -333,8 +344,10 @@
     private static final int FLAG_DUMP_FRAMESTATS   = 1 << 0;
     private static final int FLAG_DUMP_RESET        = 1 << 1;
 
-    @IntDef(flag = true, value = {
-            FLAG_DUMP_FRAMESTATS, FLAG_DUMP_RESET })
+    @IntDef(flag = true, prefix = { "FLAG_DUMP_" }, value = {
+            FLAG_DUMP_FRAMESTATS,
+            FLAG_DUMP_RESET
+    })
     @Retention(RetentionPolicy.SOURCE)
     public @interface DumpFlags {}
 
@@ -955,6 +968,9 @@
             if (mInitialized) return;
             mInitialized = true;
             mAppContext = context.getApplicationContext();
+
+            // b/68769804: For low FPS experiments.
+            setFPSDivisor(SystemProperties.getInt(DEBUG_FPS_DIVISOR, 1));
             initSched(renderProxy);
             initGraphicsStats();
         }
@@ -1007,6 +1023,13 @@
         observer.mNative = null;
     }
 
+    /** b/68769804: For low FPS experiments. */
+    public static void setFPSDivisor(int divisor) {
+        if (divisor <= 0) divisor = 1;
+        Choreographer.getInstance().setFPSDivisor(divisor);
+        nHackySetRTAnimationsEnabled(divisor == 1);
+    }
+
     /** Not actually public - internal use only. This doc to make lint happy */
     public static native void disableVsync();
 
@@ -1075,4 +1098,6 @@
 
     private static native Bitmap nCreateHardwareBitmap(long renderNode, int width, int height);
     private static native void nSetHighContrastText(boolean enabled);
+    // For temporary experimentation b/66945974
+    private static native void nHackySetRTAnimationsEnabled(boolean enabled);
 }