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/basictypes.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(); 25 26 // Returns display width in physical pixels. 27 int GetDisplayWidth(); 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(); 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(); 40 41 // Returns number of bits per pixel. 42 int GetBitsPerPixel(); 43 44 // Returns number of bits per component. 45 int GetBitsPerComponent(); 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(); 50 51 // Smallest possible screen size in density-independent pixels. 52 int GetSmallestDIPWidth(); 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(); 58 59 private: 60 DISALLOW_COPY_AND_ASSIGN(DeviceDisplayInfo); 61 }; 62 63 } // namespace gfx 64 65 #endif // UI_GFX_ANDROID_DEVICE_DISPLAY_INFO_H_ 66
