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