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// Copyright (c) 2012 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_DEVICE_DISPLAY_INFO_H_
#define UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_
#include <jni.h>
#include <string>
#include "base/android/scoped_java_ref.h"
#include "base/basictypes.h"
#include "ui/base/ui_export.h"
namespace gfx {
// Facilitates access to device information typically only
// available using the Android SDK, including Display properties.
class UI_EXPORT DeviceDisplayInfo {
public:
DeviceDisplayInfo();
~DeviceDisplayInfo();
// Returns display height in physical pixels.
int GetDisplayHeight();
// Returns display width in physical pixels.
int GetDisplayWidth();
// Returns number of bits per pixel.
int GetBitsPerPixel();
// Returns number of bits per component.
int GetBitsPerComponent();
// Returns a scaling factor for Density Independent Pixel unit
// (1.0 is 160dpi, 0.75 is 120dpi, 2.0 is 320dpi).
double GetDIPScale();
// Returns display refresh rate in number of frames per second.
double GetRefreshRate();
// Registers methods with JNI and returns true if succeeded.
static bool RegisterDeviceDisplayInfo(JNIEnv* env);
private:
base::android::ScopedJavaGlobalRef<jobject> j_device_info_;
DISALLOW_COPY_AND_ASSIGN(DeviceDisplayInfo);
};
} // namespace gfx
#endif // UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_
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