| /* | |
| * Copyright (C) 2019 The Android Open Source Project | |
| * | |
| * Licensed under the Apache License, Version 2.0 (the "License"); | |
| * you may not use this file except in compliance with the License. | |
| * You may obtain a copy of the License at | |
| * | |
| * http://www.apache.org/licenses/LICENSE-2.0 | |
| * | |
| * Unless required by applicable law or agreed to in writing, software | |
| * distributed under the License is distributed on an "AS IS" BASIS, | |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| * See the License for the specific language governing permissions and | |
| * limitations under the License. | |
| */ | |
| #pragma once | |
| #include <input/DisplayViewport.h> | |
| #include <stdint.h> | |
| #include <ui/Rotation.h> | |
| #include "EventHub.h" | |
| #include "InputListener.h" | |
| #include "InputReaderContext.h" | |
| namespace android { | |
| ui::Rotation getInverseRotation(ui::Rotation orientation); | |
| void rotateDelta(ui::Rotation orientation, float* deltaX, float* deltaY); | |
| // Returns true if the pointer should be reported as being down given the specified | |
| // button states. This determines whether the event is reported as a touch event. | |
| bool isPointerDown(int32_t buttonState); | |
| [[nodiscard]] std::list<NotifyArgs> synthesizeButtonKeys( | |
| InputReaderContext* context, int32_t action, nsecs_t when, nsecs_t readTime, | |
| int32_t deviceId, uint32_t source, int32_t displayId, uint32_t policyFlags, | |
| int32_t lastButtonState, int32_t currentButtonState); | |
| // For devices connected over Bluetooth, although they may produce events at a consistent rate, | |
| // the events might end up reaching Android in a "batched" manner through the Bluetooth | |
| // stack, where a few events may be clumped together and processed around the same time. | |
| // In this case, if the input device or its driver does not send or process the actual event | |
| // generation timestamps, the event time will set to whenever the kernel received the event. | |
| // When the timestamp deltas are minuscule for these batched events, any changes in x or y | |
| // coordinates result in extremely large instantaneous velocities, which can negatively impact | |
| // user experience. To avoid this, we augment the timestamps so that subsequent event timestamps | |
| // differ by at least a minimum delta value. | |
| std::tuple<nsecs_t /*eventTime*/, nsecs_t /*readTime*/> applyBluetoothTimestampSmoothening( | |
| const InputDeviceIdentifier& identifier, nsecs_t currentEventTime, nsecs_t readTime, | |
| nsecs_t lastEventTime); | |
| } // namespace android |