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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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