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// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_ANDROID_SHARED_DEVICE_DISPLAY_INFO_H_
#define UI_GFX_ANDROID_SHARED_DEVICE_DISPLAY_INFO_H_
#include "base/android/scoped_java_ref.h"
#include "base/basictypes.h"
#include "base/memory/singleton.h"
#include "base/synchronization/lock.h"
namespace gfx {
// Facilitates access to device information typically only
// available using the Android SDK, including Display properties.
class SharedDeviceDisplayInfo {
public:
static SharedDeviceDisplayInfo* GetInstance();
int GetDisplayHeight();
int GetDisplayWidth();
int GetBitsPerPixel();
int GetBitsPerComponent();
double GetDIPScale();
int GetSmallestDIPWidth();
// Registers methods with JNI and returns true if succeeded.
static bool RegisterSharedDeviceDisplayInfo(JNIEnv* env);
void InvokeUpdate(JNIEnv* env,
jobject jobj,
jint display_height,
jint display_width,
jint bits_per_pixel,
jint bits_per_component,
jdouble dip_scale,
jint smallest_dip_width);
private:
friend struct DefaultSingletonTraits<SharedDeviceDisplayInfo>;
SharedDeviceDisplayInfo();
~SharedDeviceDisplayInfo();
void UpdateDisplayInfo(JNIEnv* env,
jobject jobj,
jint display_height,
jint display_width,
jint bits_per_pixel,
jint bits_per_component,
jdouble dip_scale,
jint smallest_dip_width);
base::Lock lock_;
base::android::ScopedJavaGlobalRef<jobject> j_device_info_;
int display_height_;
int display_width_;
int bits_per_pixel_;
int bits_per_component_;
double dip_scale_;
int smallest_dip_width_;
DISALLOW_COPY_AND_ASSIGN(SharedDeviceDisplayInfo);
};
} // namespace gfx
#endif // UI_GFX_ANDROID_SHARED_DEVICE_DISPLAY_INFO_H_
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