1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "base/android/animation_frame_time_histogram.h"
6 
7 #include "base/android/jni_string.h"
8 #include "base/metrics/histogram_macros.h"
9 #include "jni/AnimationFrameTimeHistogram_jni.h"
10 
11 using base::android::JavaParamRef;
12 
13 // static
14 void SaveHistogram(JNIEnv* env,
15                    const JavaParamRef<jobject>& jcaller,
16                    const JavaParamRef<jstring>& j_histogram_name,
17                    const JavaParamRef<jlongArray>& j_frame_times_ms,
18                    jint j_count) {
19   jlong *frame_times_ms = env->GetLongArrayElements(j_frame_times_ms, NULL);
20   std::string histogram_name = base::android::ConvertJavaStringToUTF8(
21       env, j_histogram_name);
22 
23   for (int i = 0; i < j_count; ++i) {
24     UMA_HISTOGRAM_TIMES(histogram_name.c_str(),
25                         base::TimeDelta::FromMilliseconds(frame_times_ms[i]));
26   }
27 }
28 
29 namespace base {
30 namespace android {
31 
32 // static
33 bool RegisterAnimationFrameTimeHistogram(JNIEnv* env) {
34   return RegisterNativesImpl(env);
35 }
36 
37 }  // namespace android
38 }  // namespace base
39