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| 1 // Copyright 2015 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 // This file is based on http://osxbook.com/book/bonus/chapter10/light/ | |
| 6 | |
| 7 #include "device/sensors/ambient_light_mac.h" | |
| 8 | |
| 9 #include <utility> | |
| 10 | |
| 11 #include "base/mac/scoped_cftyperef.h" | |
| 12 #include "base/mac/scoped_ioobject.h" | |
| 13 | |
| 14 namespace device { | |
| 15 | |
| 16 namespace { | |
| 17 enum LmuFunctionIndex { | |
| 18 kGetSensorReadingID = 0, // getSensorReading(int *, int *) | |
| 19 kGetLEDBrightnessID = 1, // getLEDBrightness(int, int *) | |
| 20 kSetLEDBrightnessID = 2, // setLEDBrightness(int, int, int *) | |
| 21 kSetLEDFadeID = 3, // setLEDFade(int, int, int, int *) | |
| 22 }; | |
| 23 } // namespace | |
| 24 | |
| 25 // static | |
| 26 std::unique_ptr<AmbientLightSensor> AmbientLightSensor::Create() { | |
| 27 std::unique_ptr<AmbientLightSensor> light_sensor(new AmbientLightSensor); | |
| 28 return light_sensor->Init() ? std::move(light_sensor) : nullptr; | |
| 29 } | |
| 30 | |
| 31 AmbientLightSensor::~AmbientLightSensor() { | |
| 32 if (!io_connection_) | |
| 33 IOServiceClose(io_connection_); | |
| 34 } | |
| 35 | |
| 36 AmbientLightSensor::AmbientLightSensor() : io_connection_(IO_OBJECT_NULL) {} | |
| 37 | |
| 38 bool AmbientLightSensor::Init() { | |
| 39 // Tested and verified by riju that the following call works on | |
| 40 // MacBookPro9,1 : Macbook Pro 15" (Mid 2012 model) | |
| 41 // MacBookPro10,1 : Macbook Pro 15" (Retina Display, Early 2013 model). | |
| 42 // MacBookPro10,2 : Macbook Pro 13" (Retina Display, Early 2013 model). | |
| 43 // MacBookAir5,2 : Macbook Air 13" (Mid 2012 model) (by François Beaufort). | |
| 44 // MacBookAir6,2 : Macbook Air 13" (Mid 2013 model). | |
| 45 // Testing plans : please download the code and follow the comments :- | |
| 46 // https://gist.github.com/riju/74af8c81a665e412d122/ | |
| 47 // and add an entry here about the model and the status returned by the code. | |
| 48 | |
| 49 // Look up a registered IOService object whose class is AppleLMUController. | |
| 50 base::mac::ScopedIOObject<io_service_t> service_object( | |
| 51 IOServiceGetMatchingService(kIOMasterPortDefault, | |
| 52 IOServiceMatching("AppleLMUController"))); | |
| 53 | |
| 54 // Return early if the ambient light sensor is not present. | |
| 55 if (!service_object) | |
| 56 return false; | |
| 57 | |
| 58 // Create a connection to the IOService object. | |
| 59 kern_return_t kr = | |
| 60 IOServiceOpen(service_object, mach_task_self(), 0, &io_connection_); | |
| 61 | |
| 62 // IOServiceOpen error. | |
| 63 if (kr != KERN_SUCCESS || io_connection_ == IO_OBJECT_NULL) | |
| 64 return false; | |
| 65 | |
| 66 uint64_t lux_values[2]; | |
| 67 return ReadSensorValue(lux_values); | |
| 68 } | |
| 69 | |
| 70 bool AmbientLightSensor::ReadSensorValue(uint64_t lux_values[2]) { | |
| 71 uint32_t scalar_output_count = 2; | |
| 72 kern_return_t kr = IOConnectCallMethod( | |
| 73 io_connection_, LmuFunctionIndex::kGetSensorReadingID, nullptr, 0, | |
| 74 nullptr, 0, lux_values, &scalar_output_count, nullptr, 0); | |
| 75 | |
| 76 return kr == KERN_SUCCESS; | |
| 77 } | |
| 78 | |
| 79 } // namespace device | |
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Chromium Code Reviews
Issue 2845763002:
Remove DeviceLightEvent implementation (Closed)
