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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ | |
6 #define UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ | |
7 | |
8 #include <jni.h> | |
9 #include <string> | |
10 | |
11 #include "base/macros.h" | |
12 #include "ui/gfx/gfx_export.h" | |
13 | |
14 namespace gfx { | |
15 | |
16 // Facilitates access to device information typically only | |
17 // available using the Android SDK, including Display properties. | |
18 class GFX_EXPORT DeviceDisplayInfo { | |
19 public: | |
20 DeviceDisplayInfo(); | |
21 ~DeviceDisplayInfo(); | |
22 | |
23 // Returns display height in physical pixels. | |
24 int GetDisplayHeight() const; | |
25 | |
26 // Returns display width in physical pixels. | |
27 int GetDisplayWidth() const; | |
28 | |
29 // Returns real display height in physical pixels. | |
30 // This version does not subtract window decorations etc. | |
31 // WARNING: This is only supported on JB-MR1 (sdk >= 17). Either | |
32 // check the SDK-level, or check for '0' being returned. | |
33 int GetPhysicalDisplayHeight() const; | |
34 | |
35 // Returns real display width in physical pixels. | |
36 // This version does not subtract window decorations etc. | |
37 // WARNING: This is only supported on JB-MR1 (sdk >= 17). Either | |
38 // check the SDK-level, or check for '0' being returned. | |
39 int GetPhysicalDisplayWidth() const; | |
40 | |
41 // Returns number of bits per pixel. | |
42 int GetBitsPerPixel() const; | |
43 | |
44 // Returns number of bits per component. | |
45 int GetBitsPerComponent() const; | |
46 | |
47 // Returns a scaling factor for Density Independent Pixel unit | |
48 // (1.0 is 160dpi, 0.75 is 120dpi, 2.0 is 320dpi). | |
49 double GetDIPScale() const; | |
50 | |
51 // Smallest possible screen size in density-independent pixels. | |
52 int GetSmallestDIPWidth() const; | |
53 | |
54 // Returns the display rotation angle from its natural orientation. Expected | |
55 // values are one of { 0, 90, 180, 270 }. | |
56 // See DeviceDispayInfo.java for more information. | |
57 int GetRotationDegrees() const; | |
58 | |
59 private: | |
60 DISALLOW_COPY_AND_ASSIGN(DeviceDisplayInfo); | |
61 }; | |
62 | |
63 } // namespace gfx | |
64 | |
65 #endif // UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ | |
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