227 lines
8.4 KiB
C
227 lines
8.4 KiB
C
/* Copyright 2020 Christopher Courtney, aka Drashna Jael're (@drashna) <drashna@live.com>
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* Copyright 2022 Daniel Kao <daniel.m.kao@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <lib/lib8tion/lib8tion.h>
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#include "cirque_pinnacle_gestures.h"
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#include "pointing_device.h"
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#include "timer.h"
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#include "wait.h"
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#if defined(CIRQUE_PINNACLE_TAP_ENABLE) || defined(CIRQUE_PINNACLE_CIRCULAR_SCROLL_ENABLE)
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static cirque_pinnacle_features_t features = {.tap_enable = true, .circular_scroll_enable = true};
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#endif
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#ifdef CIRQUE_PINNACLE_TAP_ENABLE
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static trackpad_tap_context_t tap;
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static report_mouse_t trackpad_tap(report_mouse_t mouse_report, pinnacle_data_t touchData) {
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if (touchData.touchDown != tap.touchDown) {
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tap.touchDown = touchData.touchDown;
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if (!touchData.zValue) {
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if (timer_elapsed(tap.timer) < CIRQUE_PINNACLE_TAPPING_TERM && tap.timer != 0) {
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mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, true, POINTING_DEVICE_BUTTON1);
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pointing_device_set_report(mouse_report);
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pointing_device_send();
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# if TAP_CODE_DELAY > 0
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wait_ms(TAP_CODE_DELAY);
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# endif
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mouse_report.buttons = pointing_device_handle_buttons(mouse_report.buttons, false, POINTING_DEVICE_BUTTON1);
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pointing_device_set_report(mouse_report);
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pointing_device_send();
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}
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}
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tap.timer = timer_read();
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}
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if (timer_elapsed(tap.timer) > (CIRQUE_PINNACLE_TOUCH_DEBOUNCE)) {
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tap.timer = 0;
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}
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return mouse_report;
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}
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void cirque_pinnacle_enable_tap(bool enable) {
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features.tap_enable = enable;
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}
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#endif
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#ifdef CIRQUE_PINNACLE_CIRCULAR_SCROLL_ENABLE
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/* To set a trackpad exclusively as scroll wheel: outer_ring_pct = 100, trigger_px = 0, trigger_ang = 0 */
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static circular_scroll_context_t scroll = {.config = {.outer_ring_pct = 33,
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.trigger_px = 16,
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.trigger_ang = 9102, /* 50 degrees */
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.wheel_clicks = 18}};
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static inline uint16_t atan2_16(int32_t dy, int32_t dx) {
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if (dy == 0) {
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if (dx >= 0) {
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return 0;
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} else {
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return 32768;
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}
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}
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int32_t abs_y = dy > 0 ? dy : -dy;
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int16_t a;
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if (dx >= 0) {
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a = 8192 - (8192 * (dx - abs_y) / (dx + abs_y));
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} else {
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a = 24576 - (8192 * (dx + abs_y) / (abs_y - dx));
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}
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if (dy < 0) {
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return -a; // negate if in quad III or IV
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}
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return a;
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}
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static circular_scroll_t circular_scroll(pinnacle_data_t touchData) {
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circular_scroll_t report = {0, 0, false};
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int8_t x, y, wheel_clicks;
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uint8_t center = 256 / 2, mag;
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int16_t ang, dot, det, opposite_side, adjacent_side;
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uint16_t scale = cirque_pinnacle_get_scale();
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if (touchData.zValue) {
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/*
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* Place origin at center of trackpad, treat coordinates as vectors.
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* Scale to fixed int8_t size; angles are independent of resolution.
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*/
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if (scale) {
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x = (int8_t)((int32_t)touchData.xValue * 256 / scale - center);
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y = (int8_t)((int32_t)touchData.yValue * 256 / scale - center);
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} else {
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x = 0;
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y = 0;
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}
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/* Check if first touch */
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if (!scroll.z) {
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report.suppress_touch = false;
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/* Check if touch falls within outer ring */
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mag = sqrt16(x * x + y * y);
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if (mag * 100 / center >= 100 - scroll.config.outer_ring_pct) {
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scroll.state = SCROLL_DETECTING;
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scroll.x = x;
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scroll.y = y;
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scroll.mag = mag;
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/*
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* Decide scroll axis:
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* Vertical if started from righ half
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* Horizontal if started from left half
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* Flipped for left-handed
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*/
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# if defined(POINTING_DEVICE_ROTATION_90)
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scroll.axis = y < 0;
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# elif defined(POINTING_DEVICE_ROTATION_180)
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scroll.axis = x > 0;
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# elif defined(POINTING_DEVICE_ROTATION_270)
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scroll.axis = y > 0;
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# else
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scroll.axis = x < 0;
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# endif
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}
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} else if (scroll.state == SCROLL_DETECTING) {
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report.suppress_touch = true;
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/* Already detecting scroll, check movement from touchdown location */
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mag = sqrt16((x - scroll.x) * (x - scroll.x) + (y - scroll.y) * (y - scroll.y));
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if (mag >= scroll.config.trigger_px) {
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/*
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* Find angle of movement.
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* 0 degrees here means movement towards center of circle
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*/
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dot = scroll.x * x + scroll.y * y;
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det = scroll.x * y - scroll.y * x;
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opposite_side = abs(det); /* Based on scalar rejection */
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adjacent_side = abs(scroll.mag * scroll.mag - abs(dot)); /* Based on scalar projection */
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ang = (int16_t)atan2_16(opposite_side, adjacent_side);
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if (ang < scroll.config.trigger_ang) {
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/* Not a scroll, release coordinates */
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report.suppress_touch = false;
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scroll.state = NOT_SCROLL;
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} else {
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/* Scroll detected */
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scroll.state = SCROLL_VALID;
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}
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}
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}
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if (scroll.state == SCROLL_VALID) {
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report.suppress_touch = true;
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dot = scroll.x * x + scroll.y * y;
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det = scroll.x * y - scroll.y * x;
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ang = (int16_t)atan2_16(det, dot);
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wheel_clicks = ((int32_t)ang * scroll.config.wheel_clicks) / 65536;
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if (wheel_clicks >= 1 || wheel_clicks <= -1) {
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if (scroll.config.left_handed) {
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if (scroll.axis == 0) {
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report.h = -wheel_clicks;
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} else {
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report.v = wheel_clicks;
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}
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} else {
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if (scroll.axis == 0) {
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report.v = -wheel_clicks;
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} else {
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report.h = wheel_clicks;
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}
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}
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scroll.x = x;
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scroll.y = y;
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}
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}
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}
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scroll.z = touchData.zValue;
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if (!scroll.z) scroll.state = SCROLL_UNINITIALIZED;
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return report;
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}
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void cirque_pinnacle_enable_circular_scroll(bool enable) {
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features.circular_scroll_enable = enable;
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}
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void cirque_pinnacle_configure_circular_scroll(uint8_t outer_ring_pct, uint8_t trigger_px, uint16_t trigger_ang, uint8_t wheel_clicks, bool left_handed) {
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scroll.config.outer_ring_pct = outer_ring_pct;
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scroll.config.trigger_px = trigger_px;
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scroll.config.trigger_ang = trigger_ang;
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scroll.config.wheel_clicks = wheel_clicks;
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scroll.config.left_handed = left_handed;
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}
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#endif
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bool cirque_pinnacle_gestures(report_mouse_t* mouse_report, pinnacle_data_t touchData) {
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bool suppress_mouse_update = false;
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#ifdef CIRQUE_PINNACLE_CIRCULAR_SCROLL_ENABLE
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circular_scroll_t scroll_report;
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if (features.circular_scroll_enable) {
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scroll_report = circular_scroll(touchData);
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mouse_report->v = scroll_report.v;
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mouse_report->h = scroll_report.h;
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suppress_mouse_update = scroll_report.suppress_touch;
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}
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#endif
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#ifdef CIRQUE_PINNACLE_TAP_ENABLE
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if (features.tap_enable) {
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*mouse_report = trackpad_tap(*mouse_report, touchData);
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}
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#endif
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return suppress_mouse_update;
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}
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