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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ | 5 #ifndef UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ |
6 #define UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ | 6 #define UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ |
7 | 7 |
8 #include <jni.h> | 8 #include <jni.h> |
9 #include <string> | 9 #include <string> |
10 | 10 |
11 #include "base/android/scoped_java_ref.h" | |
12 #include "base/basictypes.h" | 11 #include "base/basictypes.h" |
13 #include "ui/gfx/gfx_export.h" | 12 #include "ui/gfx/gfx_export.h" |
14 | 13 |
15 namespace gfx { | 14 namespace gfx { |
16 | 15 |
17 // Facilitates access to device information typically only | 16 // Facilitates access to device information typically only |
18 // available using the Android SDK, including Display properties. | 17 // available using the Android SDK, including Display properties. |
19 class GFX_EXPORT DeviceDisplayInfo { | 18 class GFX_EXPORT DeviceDisplayInfo { |
20 public: | 19 public: |
21 DeviceDisplayInfo(); | 20 DeviceDisplayInfo(); |
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33 // Returns number of bits per component. | 32 // Returns number of bits per component. |
34 int GetBitsPerComponent(); | 33 int GetBitsPerComponent(); |
35 | 34 |
36 // Returns a scaling factor for Density Independent Pixel unit | 35 // Returns a scaling factor for Density Independent Pixel unit |
37 // (1.0 is 160dpi, 0.75 is 120dpi, 2.0 is 320dpi). | 36 // (1.0 is 160dpi, 0.75 is 120dpi, 2.0 is 320dpi). |
38 double GetDIPScale(); | 37 double GetDIPScale(); |
39 | 38 |
40 // Smallest possible screen size in density-independent pixels. | 39 // Smallest possible screen size in density-independent pixels. |
41 int GetSmallestDIPWidth(); | 40 int GetSmallestDIPWidth(); |
42 | 41 |
43 // Registers methods with JNI and returns true if succeeded. | |
44 static bool RegisterDeviceDisplayInfo(JNIEnv* env); | |
45 | |
46 private: | 42 private: |
47 base::android::ScopedJavaGlobalRef<jobject> j_device_info_; | |
48 | |
49 DISALLOW_COPY_AND_ASSIGN(DeviceDisplayInfo); | 43 DISALLOW_COPY_AND_ASSIGN(DeviceDisplayInfo); |
50 }; | 44 }; |
51 | 45 |
52 } // namespace gfx | 46 } // namespace gfx |
53 | 47 |
54 #endif // UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ | 48 #endif // UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ |
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