| /* |
| * 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, ui::LogicalDisplayId 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 |
