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/*
* Copyright 2023 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.
*/
#include "HardwareProperties.h"
namespace android {
namespace {
unsigned short getMaxTouchCount(const InputDeviceContext& context) {
if (context.hasScanCode(BTN_TOOL_QUINTTAP)) return 5;
if (context.hasScanCode(BTN_TOOL_QUADTAP)) return 4;
if (context.hasScanCode(BTN_TOOL_TRIPLETAP)) return 3;
if (context.hasScanCode(BTN_TOOL_DOUBLETAP)) return 2;
if (context.hasScanCode(BTN_TOOL_FINGER)) return 1;
return 0;
}
} // namespace
HardwareProperties createHardwareProperties(const InputDeviceContext& context) {
HardwareProperties props;
RawAbsoluteAxisInfo absMtPositionX;
context.getAbsoluteAxisInfo(ABS_MT_POSITION_X, &absMtPositionX);
props.left = absMtPositionX.minValue;
props.right = absMtPositionX.maxValue;
props.res_x = absMtPositionX.resolution;
RawAbsoluteAxisInfo absMtPositionY;
context.getAbsoluteAxisInfo(ABS_MT_POSITION_Y, &absMtPositionY);
props.top = absMtPositionY.minValue;
props.bottom = absMtPositionY.maxValue;
props.res_y = absMtPositionY.resolution;
RawAbsoluteAxisInfo absMtOrientation;
context.getAbsoluteAxisInfo(ABS_MT_ORIENTATION, &absMtOrientation);
props.orientation_minimum = absMtOrientation.minValue;
props.orientation_maximum = absMtOrientation.maxValue;
RawAbsoluteAxisInfo absMtSlot;
context.getAbsoluteAxisInfo(ABS_MT_SLOT, &absMtSlot);
props.max_finger_cnt = absMtSlot.maxValue - absMtSlot.minValue + 1;
props.max_touch_cnt = getMaxTouchCount(context);
// T5R2 ("Track 5, Report 2") is a feature of some old Synaptics touchpads that could track 5
// fingers but only report the coordinates of 2 of them. We don't know of any external touchpads
// that did this, so assume false.
props.supports_t5r2 = false;
props.support_semi_mt = context.hasInputProperty(INPUT_PROP_SEMI_MT);
props.is_button_pad = context.hasInputProperty(INPUT_PROP_BUTTONPAD);
// Mouse-only properties, which will always be false.
props.has_wheel = false;
props.wheel_is_hi_res = false;
// Linux Kernel haptic touchpad support isn't merged yet, so for now assume that no touchpads
// are haptic.
props.is_haptic_pad = false;
RawAbsoluteAxisInfo absMtPressure;
context.getAbsoluteAxisInfo(ABS_MT_PRESSURE, &absMtPressure);
props.reports_pressure = absMtPressure.valid;
return props;
}
} // namespace android
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